JPS59186762A - Joint structure of framework - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a joint structure for a frame such as a vehicle body structure, and in particular, to improve the local rigidity and stress of a frame that has been made thinner in order to reduce the weight of the body structure. The present invention relates to a frame joint structure suitable for

[Background of the invention]

The conventional structure will be explained below with reference to FIGS. 1 to 4. Fig. 1 is a side view of a vehicle body structure in which the frame joint structure targeted by the present invention is used, and Figs. 2 and 3 show the frame joint structure of section A in Fig. 1 viewed from the interior side. In the same figure, ■ is the outer plate of the side structure, 2 is the side pillar formed of a hat-shaped thin plate, 2a, 2b, and 2c.
are the outer plate side flange, the indoor side flange, and the web of the side column 2, respectively. 3 is a waist belt made of 2-shaped thin plate;
3a, 3b, and 3C indicate the outer plate side flange, indoor side flange, and web of the waistband 3, respectively. Reference numeral 4 indicates a spot weld that joins the outer panel 1, the side pillar 2, and the waist belt 3.

FIG. 3 shows a state where the frame connection part shown in FIG. 2 is constructed using a three-dimensional frame joint, and 5 is a three-dimensional frame joint;
5a, 5b and 5c are the outer plate side flange, indoor side flange and web of the three-dimensional frame joint 5, respectively.

By the way, when loads such as passengers and dead weight act on the vehicle structure shown in FIG. 1, a large shearing load acts in the vicinity of the fulcrum corresponding to the position of the bogie.

Therefore, the corner of the window in section A in FIG. 1 is in a compressive stress state. The structure of the frame connection within this window is generally (one frame passes through as the main member, and the other members are divided at two positions and joined to the sides of the main member. Figure 2 shows one of them.
As an example, in order to reduce the thickness, the side post 2 is made into a hunt shape, and a Z-shaped waist belt 3 is connected to the web 2cl. FIG. 3 shows an example of a structure in which a three-dimensional frame joint 5 is used in order to achieve a lightweight limit design of this joint, to make the members ultra-thin and to reduce the number of man-hours. In such a joint structure, a compression weight of 1 bending load (acting on section A in FIG. 1) is applied as shown by the arrow in FIGS. 2 and 3.

), the thinned, knot-shaped side column 2 deforms and makes a noise. FIG. 4 shows a cross section taken along line B-B in FIG. 2. The hat-shaped side column 2 forms a closed cross section with the outer plate 1, and is thinned, so its web 2C is deformed. This will cause out-of-plane deformation of the outer panel 1 (III l).For this reason, the shared load of the outer panel 1, which transmits the most multiple loads, will decrease at the window corners, so the This increases the stress and the load shared by the spot welds 4 that connect the outer skin 1 and the frame.Therefore, it is difficult to reduce the thickness of the hunt-shaped frame, which is effective in reducing the weight of the vehicle structure, and the plate In order to ensure the strength of the window corner, which is a factor that determines the strength and reliability of the vehicle body structure, there is a limit to how thin the parts can be made in the conventional structure. There were drawbacks.

[Purpose of the invention]

In view of the above points, the present invention aims to reduce the weight of frame members in a thin plate structure formed by a frame such as a vehicle body and an outer plate. The purpose of this invention is to provide a frame joint structure that can improve local rigidity and ensure strength and rigidity at openings such as window corners.

[Summary of the invention]

The present invention is a frame consisting of an outer panel side flange, an indoor side flange, and a web, and which forms a closed cross section with the outer panel. In order to effectively utilize the flange and the web close to the outer panel side, a member is provided on the outer panel side of the frame to connect the web of the frame and the outer panel to prevent out-of-plane deformation of the outer panel and the frame. In particular, we will explain how the construction is such that strength and rigidity are ensured in areas where strength is critical, such as the inside, and the frame member is made thinner to reduce weight and improve reliability in terms of strength. FIG. 5 is a perspective view showing a joint structure in which the present invention is applied to part A in FIG. 1, and FIG. 6 is C in FIG.
-C sectional view and FIG. 7 are perspective views showing a member provided on the inside of the hat-shaped steel.

In FIG. 1, the same reference numerals as in the conventional example indicate the same members. Reference numeral 6 indicates a reinforcing member provided on the inside of the side post 2, that is, a reinforcing member provided at the center of the connecting portion between the side post of the public corner and the waist belt 3, and 7 indicates a spot for combining two of the reinforcing members 6 in advance and joining them together. The welded part 8 is the reinforcing member 6 attached to the side column 2I.
A coupling portion 9 such as a column weld or a blind rivet is an adhesive for bonding the reinforcing member 6 to the outer panel 1 and the side panel 2. II, 11' are notched holes for improving adhesive bonding of the adhesive.

The manufacturing procedure for such a configuration is to first process and mold each member. The side post 2 is cut to a predetermined size.

For the reinforcing member 6, cut holes 11 and 11' for adhesion are formed in advance at predetermined positions, and then bent to fit the inner dimensions of the side column 2, as shown in FIG. The webs 6c are overlapped and joined by spot welding ali 71CJC-5. The set of reinforcing members 6 is set in a predetermined position by forming a joint 8 such as plug welding or blind rivet on the inner surface of the hat-shaped side column 2, as shown in FIG. The position and length l of the reinforcing member 6 are determined by the side post 2 and the waist belt 3.
It is determined based on the area where the window stress converges to a nearly constant value, centered on the location where the two bond. In addition, the height l' of the reinforcing member 6 is within a range where the web 2c of the side pillar 2 can be effectively used, that is, the outer panel 1, the web 2c of the side pillar 2, and the reinforcing member 6 are integrated (there is almost no cross-sectional deformation). ) is determined as the operating range. (Determined by the plate thickness, width, and quality of each member.) In this way, after setting the reinforcing member 6 to the side pillar 2, the waist belt 3 and outer plate 1 are set, and assembly is performed by spot welding 4. Let's do it. In this way, after the entire assembly is completed, the adhesive 9 is inserted through the hole 10 previously provided in the web 2c of the side column 2. In this case, the bonding strength between the reinforcing member 6, the outer panel 1, and the web 2c of the side column 2 is In order to increase the flange 6a of the reinforcing member 6
and 6b' are provided with cutout holes 11.11'.

In addition, as the adhesive material 9, a hard urethane agent or the like that can be injected and foamed and has relatively high rigidity and strength is considered to be suitable.

According to such a configuration, when a compressive load as shown by the arrow in FIG. The side column 2, that is, the web 2c of the hat-shaped steel is effective. Further, in place of the flange 2b, which hardly contributed to the in-plane load of the outer panel 1 in the conventional structure, the nib 6b of the reinforcing member 6 becomes effective. Furthermore, the outer plate l
By hardening the webs 2C and 2C with the reinforcing material 6 and the adhesive 9, it is possible to prevent out-of-plane deformation of the outer plate 1 between the side columns 2 having a closed cross section, that is, the webs 2c of the hat-shaped steel.

Therefore, the stress at the window corners and spot welds, which are the most severe in terms of strength, in the vehicle body structure is significantly reduced compared to conventional structures, making it possible to use thinner members for the entire body structure. A skeleton joint that is lightweight and highly reliable in terms of strength can be obtained.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to effectively utilize one member close to the outer panel of the thinned frame.
The outer panel can be effectively used as a strength member. Therefore, it is possible to reduce the dimensions of components such as window blinds, which are difficult to strengthen, and to reduce the stress on window blinds and reduce the shared load at joints such as spot welding, which reduces the overall weight of the structure. This has the effect of further improving strength and reliability.

[Brief explanation of the drawing]

FIG. 1 is a side view of the vehicle structure, FIG. 2 and FIG. 3 are perspective views showing different conventional examples corresponding to section A in FIG. 1, and FIG. 4 is a sectional view taken along line B-B in FIG. FIG. 5 is a perspective view corresponding to part A in FIG. 1 of a vehicle body structure to which the present invention is applied, FIG. 6 is a cross-sectional view taken along line C-C in FIG. 5, and FIG. FIG. l... Outer plate, 2... Side pillar, 2a...
... Outer plate side flanone, 2b ... Indoor side flange, 2c ... Web, 4.7 ... Spot welded part, 6 ... Reinforcement member, 8...Joining part, 9...Adhesive, figure 1, figure 4, figure 6, figure f7

Claims (1)

[Scope of Claims] 1. An outer panel flange that is separated by a predetermined interval and is joined to the outer panel, an indoor flange located on the indoor side of the outer panel flange, and the outer panel flange and the indoor flange. A frame member comprising a tube formed to connect the two and forming a closed cross section with the outer plate;
7 langes on the outer panel side that are joined to the outer panel, 7 langes on the indoor side located on the indoor side, and formed to connect the outer panel side flange and the indoor side flange, and are coupled to the web surface of the bone member. 7 on the outer plate side of each bone member.
In a joint structure of a frame consisting of an outer plate joined to a lunge, a reinforcing member is provided near the outer plate side inside the frame member and connects each of the webs and connects each web and the outer plate. A frame joint structure characterized by being composed of. 2. The frame joint structure according to claim 1, wherein the frame member, the reinforcing member, and the outer plate are joined by an adhesive filled inside the reinforcing member.