JPH09323664A - Panel reinforcing structure and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bulk type panel reinforcing structure having the capability of reinforcing an arbitrary area with sufficient strength. SOLUTION: A reinforcement is applied to panels 2a and 2b of hat type cross section having flanges 17 and 18 at both sides. A bulk material is solidified around a core material 12 projected from the surface of a reinforcing panel 10, to such a form as corresponding to the recess 2c of the panels 2a and 2b having hat type cross section, thereby forming a reinforcing bulk 13. Then, both ends of the reinforcing panel 10 are jointed to the flanges 17 and 18 of the panels 2a and 2b having hat type cross section, with the bulk 13 inserted in the recess 2c.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel reinforcing structure for reinforcing a hat-shaped cross-section panel and a manufacturing method thereof.

[0002]

2. Description of the Related Art A center pillar of a vehicle has a plurality of hat cross-section structures, a plurality of partition wall structures, and an increase in plate thickness in order to secure a living space by suppressing the deformation in a side collision. It is reinforced by using high-strength materials. Further, instead of such a reinforcing structure that leads to an increase in weight or cost, it is also practiced to fit a styrene foam as a reinforcing bulk.

[0003]

However, only by fitting the Styrofoam into the hat cross section, the cross section deformation of that portion is suppressed against the deformation at the time of collision, and there is little contribution to the improvement of the plastic moment of all sections. Further, it is impossible to obtain the rigidity effect in the elastic region where the deformation is minute.

In view of the above points, an object of the present invention is to provide a bulk type panel reinforcing structure capable of reinforcing any place with sufficient strength and a manufacturing method thereof.

[0005]

In order to achieve this object, the present invention provides a panel reinforcing structure for reinforcing a hat-shaped cross-section panel having flange portions on both sides according to claim 1, and a surface of a reinforcement panel. A reinforcing bulk is formed by solidifying the bulk material into a shape corresponding to the recess of the hat-shaped cross-section panel around the core material that protrudes from the core material. It is characterized in that both ends of the reinforcement panel are joined to the flange portion of the panel.

As a result, the reinforcing bulk is solidified and integrated with the core material of the reinforcement panel, and the hat-shaped cross-section panel is reinforced in the state of being inserted into the recess.

According to claim 3, such a reinforcing structure is
At least two cuts are formed in the reinforcement panel, the reinforcement panel portion between these cuts is pressed to form a core material, and the core material is inserted into the mold in a shape corresponding to the recess. Bulk material is poured as a molding material such as concrete, ceramic, resin, molten metal, etc. to form a reinforcing bulk, and with the reinforcing bulk inserted in the recess, the reinforcement panel of the reinforcement panel is attached to the flange part of the hat cross-section panel. It is manufactured by spot welding both ends.

When the two cross-section hat-shaped panels are joined to each other at the flange portions on both sides to form a pillar, according to claim 2, the bulk material is cross-section hat-shaped around the core material protruding from both sides of the reinforcement panel. In the state that the reinforcing bulk is formed on both sides by hardening to the shape corresponding to the concave part of the panel, and the reinforcing bulk belonging to the concave part is inserted to sandwich the reinforcement panel between the two hat-shaped cross-section panels. Join both ends of the reinforcement panel to the flanges on both sides of the two hat-shaped cross-section panels. At this time, according to claim 4, four or more parallel cuts are formed in the reinforcement panel, and the reinforcement panel portions between the cuts adjacent to each other are alternately pressed in opposite directions to form a core on both sides of the reinforcement panel. The material is easily formed.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A panel reinforcing structure for a vehicle center pillar according to an embodiment of the present invention will be described with reference to FIGS. In the vehicle body shown in FIG. 4, the center pillar 2A is integrally formed from the roof to the rocker, and the center pillar 2 of FIG. 1 has only the center pillar portion in the circle portion A reinforced to cope with a side collision. Show.

The center pillar 2, as shown in FIGS. 3A and 3B, is constructed by joining flange portions 17 and 18 of two hat-shaped cross-section panels 2a and 2b to each other in the same manner as the rest of the center pillar 2A. To be done. In FIG. A, reference numeral 10 is a reinforcement panel of a portion within a circular portion A which is narrowed toward the upper side formed corresponding to the plan view shape of the center pillar 2A.

A manufacturing process of a panel reinforcing structure for reinforcing the center pillar 2 with the reinforcement panel 10 will be described with reference to FIG. Reinforcement panel 1
At 0, a cut 11 which is narrower than the recess 2c of the hat-shaped cross-section panels 2a and 2b is formed (A in the figure). By pressing, parallel cuts 11 are alternately pressed in opposite directions to form U-shaped cores 12 so as to project from both sides (FIG. B). A concrete-based bulk 13 corresponding to the recess 2c around the core 12 and having a hollow portion 19 is molded by a method described later (FIG. 7C). When assembling the entire center pillar 2A,
The center pillar 2 is obtained by sandwiching the reinforcement panel 10 in which the bulk 13 is solidified and integrated with the panel 2 between the panels 2a and 2b (D in the same figure), and spot-welding the flange portions 17 and 18 to both ends of the reinforcement panel 10. The reinforcement structure is manufactured. FIG. 3 shows a sectional view thereof.

FIG. 2 schematically illustrates a method of molding the bulk 13, in which the reinforcement panel 10 is inserted between the molds 21 that can be opened and closed so that the core material 12 faces each other, and then the hollow portion 19 is formed. Therefore, the core members 22 on both sides are made to enter the core member 12 from above. Then, the core member 22
With the mold 21 pressed against the reinforcement panel 10.
The concrete 21 as a molding material.
Inject. As a result, after the concrete material is solidified around the core material 12, the core member 22 is pulled out downward, the mold 21 is further opened, and the bulk 13 shown in FIG.
Is formed.

The rigidity of the circular portion A, which is particularly easily deformed at the time of a side collision, is determined by the shape of the hollow portion 19 due to the square-shaped concrete type bulk which is solidified by providing the hollow portion 19 around the core material 12. The weight can be locally increased as desired in consideration of the weight. That is, it is possible to improve bending rigidity, torsional rigidity, full-section plastic moment and deformation energy absorption performance. further,
When a synthetic resin having an adhesive force is poured between the outer peripheral surface of the bulk 13 and the inner surfaces of the panels 2a, 2b and cured and adhered in the coating process, the rigidity is significantly improved.

Similarly, in the case of reinforcing the circular portion B near the rocker of the center pillar 2A which may receive a large impact at the time of a side collision, as shown in FIG. 5, the reinforcement panel 10A has a bulk corresponding to the T-shape. 23 is molded by the same method. At this time, the core material 24 can be formed in the above-mentioned U-shape, but it is also conceivable to form the core material simply by cutting and raising as shown in FIG.

The bulk may be made of ceramics as a molding material, or may be molded of synthetic resin. Also in this case, a mold corresponding to the recess is prepared, and the core is inserted into the mold for bulk support, and the mold is formed.
Further, it is also possible to mold the material for molding or forging by using a metal as a molding material. Instead of the above-described embodiment, a hat-shaped cross-section panel having only one side can be reinforced by forming a bulk on only one side of the reinforcement panel and spot-welding both ends thereof to the flange portion.

[0016]

According to the first aspect of the present invention, a hat-shaped cross-section panel made of a steel plate or the like can be arbitrarily formed by a molded bulk without increasing the plate thickness, forming a complicated panel structure, or using a high-strength material. It is possible to surely increase the rigidity or the deformation strength of the portion. According to the invention of claim 2, 2
Pillars composed of a single hat-shaped panel in section are reinforced with a similar structure.

According to the third aspect of the present invention, the bulk of any shape can be easily integrally formed at any position of the hat-shaped cross-section panel. According to the invention of claim 4, even in a pillar constituted by two hat-shaped cross-section panels, a bulk can be easily formed on both sides of one reinforcement panel.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating a method of manufacturing a vehicle center pillar reinforcing structure according to an embodiment of the present invention.

FIG. 2 is a perspective view schematically explaining a method of molding a bulk of the reinforcing structure.

FIG. 3 is a sectional view of the reinforcing structure.

FIG. 4 is a perspective view showing a panel structure of a vehicle to which the reinforcing structure is applied.

5 is an exploded perspective view showing a reinforcing structure of a circular portion B of FIG.

FIG. 6 is a perspective view showing a modified example of the core material of the same reinforcing structure.

[Explanation of symbols]

 2, 2A Center pillar 2a, 2b Cross section hat type panel 10, 10A Reinforce panel 12, 24 Core material 13, 23 Bulk 17, 18 Flange part

Claims (4)

[Claims] 1. A panel reinforcing structure for reinforcing a cross-section hat-shaped panel having flanges on both sides, wherein a bulk material is provided around a core material projecting from the surface of the reinforcement panel and corresponds to a recess of the hat-shaped cross-section panel. A reinforcing bulk is formed by hardening it into a shape, and both ends of the reinforcement panel are joined to the flange portion of the hat cross-section panel in a state where the reinforcing bulk is inserted into the recess. Panel reinforced structure. 2. A panel reinforcing structure for reinforcing two cross-section hat-shaped panels that form pillars by joining flanges on both sides to each other, wherein a bulk material is provided around a core material protruding from both sides of the reinforcement panel. Is formed into a shape corresponding to the concave portion of the hat-shaped cross-section panel, a reinforcing bulk is formed on both surfaces of the panel, and the reinforcing bulk belonging to the concave portion is inserted between the two hat-shaped cross-section panels. A panel reinforcing structure characterized in that both ends of the reinforcement panel are joined to the flange portions of the two hat-shaped cross-section panels in a state where the reinforcement panel is sandwiched. 3. Reinforcement panel with at least 2
Form cuts of a book, press the reinforce panel portion between these cuts to form a core material, and insert the bulk material into the mold with the core material inserted in a mold having a shape corresponding to the recess. Injecting as a molding material to form a reinforcing bulk, and in a state where the reinforcing bulk is inserted into the recess, spot welding both ends of the reinforcement panel to the flange portion of the hat-shaped cross-section panel. The method for manufacturing the panel reinforcing structure according to claim 1. 4. In order to reinforce two hat-shaped cross-section panels that form pillars by joining flange portions on both sides to each other, four or more parallel cuts are formed in the reinforcement panel, and the adjacent reinforcement sections are adjacent to each other. The method for manufacturing a panel reinforcing structure according to claim 3, wherein the reinforcement panel portions between the cuts are alternately pressed in opposite directions to form core members on both surfaces of the reinforcement panel.