JPH07101356A - Panel reinforcing structure - Google Patents

Abstract

PURPOSE:To provide an excellent strength against deformation and collapse, to improve a coupling strength, and to reduce the ' hemming workhours, in a panel reinforcement structure wherein an edge bent part formed by a hemming work for the edge part of an outer panel is coupled to a flange part arranged to a reinforcing material to reinforce the outer panel from the inner surface side thereof. CONSTITUTION:A reinforcing material 331 is formed of an extruded material comprising a main part 39a formed in a closed surface shape in cross section; a flange part 39d extending sideways from the main part 39a; and a thick section part 39f protruded inwardly at the tip of the flange part 39d. The edge curved part 27a1 of an outer panel 27 is coupled to a flange part 39d in a roped hem shape wherein the edge curved part is brought into adhesion to the outer surface of the thick section part 39f.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an edge bent portion formed by hemming an edge portion of an outer panel, which is joined to a flange portion provided on a reinforcing member for reinforcing the outer panel from its inner surface side. Panel reinforcement structure.

[0002]

2. Description of the Related Art Conventionally, such a structure has been disclosed in, for example, Japanese Patent Laid-Open No. HEI-2.
280928 and Japanese Patent Publication No. 63-2690.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In Japanese Patent Publication No. 928, the hemming process applied to the edge portion of the outer panel connects the rope-hem-shaped edge bending portion to the flange portion of the reinforcing member, but there is a gap between the edge bending portion and the tip of the flange portion. It is hard to say that the binding force is sufficient because of the occurrence of Further, in performing the hemming process of the roped hem shape, as shown in FIG. 18, a bending step (step of FIG. 18 (a)) of bending an edge portion of the outer panel 27 ′ at a substantially right angle and a bent edge portion are performed. The pre-bending step of pre-bending into a curved shape (step of FIG. 18B) and the pre-bending portion up to about 45 degrees with the flange portion 33a 'of the reinforcing member 33' in contact with the outer panel 27 '. The step of folding back (step of FIG. 18 (c)) and the step of joining (step of FIG. 18 (d)) to join the edge bent portion 27a 'of the rope hem shape so as to wrap the tip of the flange portion 33a' to the flange portion 33a '. ) And must be performed in this order, and the number of hemming processes was relatively large.

In Japanese Patent Publication No. 63-2690, the flat hem-shaped edge bending portion is joined to the flange portion of the reinforcing member by the hemming process applied to the edge portion of the outer panel. Similar to the above case, since a gap is formed between the edge bent portion and the tip of the flange portion, it is difficult to say that the strength against deformation and crushing is insufficient and the bonding force is sufficient.

The present invention has been made in view of the above circumstances, and the edge bending portion of the outer panel is brought into close contact with the tip of the flange portion of the reinforcing member to obtain excellent strength against deformation and crushing, and the bonding strength. It is an object of the present invention to provide a panel reinforcing structure capable of reducing the processing man-hours when performing hemming of a roped hem shape by improving the above.

[0006]

In order to achieve the above object, according to the invention of claim 1, the reinforcing material comprises a main portion having a closed cross-sectional surface shape, and a flange extending laterally from the main portion. Section, and an extruded material having a thick portion that bulges inward at the tip of the flange portion, and the edge bend portion of the outer panel is joined to the flange portion in a rope-to-hem shape that is in close contact with the outer surface of the thick portion. It

According to the second aspect of the present invention, the reinforcing material is an extruded material having a main portion having a closed cross-sectional surface shape and a flange portion that extends laterally from the main portion and has a rounded tip. In addition, the edge bending portion of the outer panel is joined to the flange portion in a flat hem shape in close contact with the tip of the flange portion.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 15 show a first embodiment of the present invention. FIG. 1 is a front perspective view of a vehicle with a hood open, FIG. 2 is a bottom view of the hood, and FIG. FIG. 4 is a perspective view of the first extruded material, FIG. 4 is a perspective view of the second extruded material, FIG. 5 is an enlarged view of part 5 of FIG. 2, FIG. 6 is a sectional view taken along line 6-6 of FIG.
7 is an enlarged view of part 7 of FIG. 2, FIG. 8 is a sectional view taken along line 8-8 of FIG. 7, FIG. 9 is a sectional view showing a hemming process, FIG. 10 is a perspective view of a third extruded material, and FIG. 11 to 11 are cross-sectional perspective views of a portion taken along the line 11-11, FIGS. 12 to 14 are perspective views sequentially showing the steps of processing the coupling frame, and FIG. 15 is a cross-sectional perspective view of the portion taken along the line 15-15 in FIG.

First, in FIG. 1, a bonnet 26 formed in the front part of the vehicle body B for closing the engine room 25 from above is formed by reinforcing the inner surface of the outer panel 27 with a stiffener 28. Hinge portions 29, 29 for hinged connection to the vehicle body B are provided on both sides of the rear end along the vehicle front-rear direction, and an anchor portion 30 is provided on the center of the front end of the bonnet 26 along the vehicle front-rear direction. A striker 31 as an engaging means that is lockably engaged with the vehicle body B is attached to the anchor portion 30.

Referring also to FIG. 2, the stiffener 28
Both ends are connected to both hinge portions 29, 29, respectively.
Also, the main part whose middle part is connected to the anchor part 30
The frame 32 and both side edges and front edges of the outer panel 27
Outer peripheral frame 33 as a reinforcing member coupled to the
₁And a reinforcement member that is joined to the rear edge of the outer panel 27.
Second outer peripheral frame 33₂And the mainframe 32
And the first outer frame 33 ₁A pair of first connecting between
Combined frame 34₁, 34₁And the mainframe 32
And the first outer frame 33₁A pair of second connections that connect the two
Combined frame 34₂, 34₂And the mainframe 32 and
And the second outer frame 33₂Third connection frame that connects between
Mu 34₃And connect both ends to the main frame 32.
It consists of an auxiliary frame 35 that reinforces the in-frame 32.
It

In FIG. 3, the main frame 32 is a first extruded material 36 formed by extruding an aluminum alloy or the like.
Is formed by. The first extruded material 36 has a left-right symmetrical cross-sectional shape, and has a rectangular frame-shaped main body 36a having a closed cross-section and one side facing the frame main body 36a. A pair of overhanging portions 36 extended to the
b and 36c, a pair of overhanging portions 36d and 36e extending from the frame main portion 36a to the other side facing each other, and engaging claws provided inside the tips of the overhanging portions 36b to 36e, respectively. 36f ... Thus, the protrusions 36b and 36c having the engaging claws 36f on the inner side of the tip form a fitting concave portion 37 having a substantially U-shaped cross section open to one side, and the engaging claw on the inner side of the tip. Overhang 36 having 36f ...
By d and 36e, a fitting recess 37 having a substantially U-shaped cross section opened to the other side is formed. That is, the first extruded material 36 is provided with fitting recesses 37, 37 extending along the extruding direction on both sides of the frame main portion 36a having a closed cross section extending along the extruding direction 38.

The first extruded material 36 as described above is provided in the fitting recess 3
The main frame 32 is formed by bending the central portions so that the central portions of the main frames 32 and 7 are arranged at the inner and outer sides.

In FIG. 4, the first and second outer peripheral frames 33 ₁ and 33 ₂ are formed of a second extruded material 39 ₁ formed by extruding an aluminum alloy or the like. This second
Extruded material 39 ₁ includes a frame main portion 39a of the closed section is a rectangular shape, a pair of projecting portions 39 b, 39c which extends to one side to face each other from the frame main portion 39a, the frame A flange portion 39d which is continuous with the main portion 36a and extends on the opposite side of the overhanging portion 39b;
Engaging claws 39e provided on the inner side of the tip of 39c ...
And a thick-walled portion 39f that bulges in a hemispherical shape inside the front end of the flange portion 39d. Thus, the second extruded material 39 ₁ is
A frame main portion 39a having a closed cross-sectional shape extending along the pushing direction 41 has a substantially U-shaped cross section opened to one side by overhanging portions 39b and 39c having engaging claws 39f ... The fitting recess 40 is provided along the extruding direction 41, and the flange 39d having a thick portion 39f at the tip and projecting to the other side is provided along the extruding direction 41. The fitting recess 37 of the first extruded material 36 is formed in the same shape.

[0015] Such a second extrusion material 39 _1, by the flange portion 39d is bent into a shape corresponding to the side edges and the front edge of the outer panel 27 so as to be positioned laterally outwards, the first peripheral frame 33 ₁ is formed. The second extruded member 39 _1, by the flange portion 39d is bent in a shape corresponding to the rear edge of the outer panel 27 so as to be positioned laterally outside the second outer peripheral frame 33
₂ is formed.

In FIGS. 5 and 6, the hinge portion 29 is shown.
Is the frame main part 3 at the end of the main frame 32.
6a, the connecting arm portion 29a and the first outer peripheral frame
Mu 33 ₁Coupling arm 29b engaged in the fitting recess 40 of
And the second outer peripheral frame 33₂Engaged in the fitting recess 40 of
Each of the connecting arm portions 29c.
29a to 29c are the main frames due to the screw members 42 ...
Frame 32, first outer frame 33₁And the second outer frame
Mu 33₂Fastened to.

7 and 8, the anchor portion 30
Is a coupling arm portion 30a engaged in the outer fitting recess 37 in the middle portion of the main frame 32, and a coupling arm portion 3 engaged in the fitting recess 40 of the first outer peripheral frame 33 _1.
0b, and both connecting arm portions 30a, 30b
Are fastened to the main frame 32 and the first outer peripheral frame 33 ₁ by the screw members 43 ....

By the way, the peripheral portion of the outer panel 27
Is the first and second outer peripheral frames 33. ₁, 33₂To hemi
It is joined by a ring process. That is, the first and second
Outer frame 33₁, 33₂In the outer part of FIG.
As shown in FIG. 8, a flange portion 39d ... Is provided.
And the thick portion 3 at the tip of the flange portion 39 ...
9f ... Hemin the outer panel 27 peripheral edge.
The outer edge of the outer panel 27 is
Rope heme-shaped edge bend 27a₁Is processed as
The edge bent portion 27a₁Is the first and second outer frame 33
₁, 33₂To be connected to the flange portion 39 ...
It

In FIG. 9, when the outer panel 27 is joined to the first outer peripheral frame 33 ₁ by subjecting its front edge and both side edges to hemp hem hemming, first, as shown in FIG. 9 (a), Outer panel 27
With the upper and lower molds 55, 56 sandwiched between them.
The edges of the outer panel 27 projecting from 5, 5 and 56 are bent at a substantially right angle by a bending die 57 to form a bent portion 27b.
The bending step is performed. Next, as shown in FIG. 9B, the outer panel 27 and the first outer frame 33 ₁
And the upper and lower molds 58 and 59 in close contact with each other, and by the folding mold 60, the bending portion 27b.
4 along the thick portion 39f at the tip of the flange portion 39d.
The turn back process is performed up to about 5 degrees. After that, as shown in FIG. 9C, the press-fitting mold 61 having the pressing surface 61a corresponding to the tip shape of the flange portion 39d including the thick wall portion 39f is brought into close contact with the thick wall portion 39f by the rope hem-shaped edge bending portion 27a. ₁ is formed while being joined to the tip of the flange portion 39d.

Also, when the outer panel 27 is joined to the second outer peripheral frame 33 ₂ by applying hemp-hem hemming to its rear edge, the same steps as those described above are executed.

In FIG. 10, the first combined frame 3
4 ₁ , second combined frame 34 ₂ , third combined frame 34
_{The 3} and the auxiliary frame 35 are formed by a third extruded material 45 formed by extruding an aluminum alloy or the like. The third extruded material 45 is formed symmetrically to the left and right. A pair of fitting portions 47, 47 extending along the pushing direction 46 of the three-extruded material 45 are connected to each other by a connecting portion 48, and both fitting portions 47, 47 include the first and second fitting portions 47, 47. Fitting recesses 37, 40 for extruded materials 36, 39
It is formed to have a rectangular closed cross-sectional shape to enable fitting. Moreover, the fitting recesses 37 in the first extruded material 36 are formed on the outer surfaces of the four corners of the fitting portions 47, 47.
Engaging claw 36f and engaging claw 39e of the fitting recess 40 in the second extruded material 39 ₁ can be engaged.
... are provided respectively.

Referring again to FIG. 2, the first combined frame 34
₁ is formed by bifurcating both ends thereof and bending the bifurcating portion, and the fitting portions 47 ... In the bifurcated portion, as shown in FIG.
3 ₁ are respectively fitted in the fitting recesses 40, and the fitting parts 47 ...
By being fitted in the fitting recesses 37 of the respective parts, the space between the main frame 32 and the first outer peripheral frame 33 ₁ becomes the first part.
They are joined by the joining frame 34 ₁ .

That is, as shown in FIG. 12, after making a cut 49 in the connecting portion 48 of the third extruded material 45 from one end thereof to an appropriate position, both fitting portions 4 are formed as shown in FIG.
7, 47 are bent so as to be separated from each other. Further, as shown in FIG. 14, in the separated fitting portion 47, the fitting concave portion 40 of the first outer frame 33 _{1 and} the fitting concave portion 37 of the main frame 32 are formed. To the fitting part to
Grooves 50 ... For engaging the 9f ..., 36f ... Are provided.

In FIG. 15, the second coupling frame 34 ₂
Is formed by cutting the third extruded material 45 with a relatively short length. The fitting recess 37 on the outer side of the end of the main frame 32 and the end of the first outer peripheral frame 33 _{1 on} the hinge 29 side. The fitting portions 47, 47 are fitted into the fitting concave portion 40 on the inner side. Thus, both engaging claws 36f of the fitting recess 37 ...
The engaging claws 39e of the fitting recess 40 are engaged with the engaging recesses 47a on the inner sides of the fitting parts 47, 47, respectively.

Referring again to FIG. 2, the third combined frame 34
₃ is formed by separating both ends of the third extruded material 45 into bifurcated parts and bending the separated parts, and the one end side separated part is formed in the fitting concave part 37 of the main frame 32.
The coupling frame 34 ₁ is fitted with a structure similar to the fitting structure with the first outer peripheral frame 33 ₁ , and the middle portion of the other end side separating portion is fitted into the fitting concave portion 40 of the second outer peripheral frame 33 _2. And the leading end is the fitting recess 3 of the main frame 32.
7 are fitted respectively.

The auxiliary frame 35 is formed by separating both ends of the third extruded material 45 into bifurcated parts, bending the separated parts, and bending the intermediate part so as to straddle the third coupling frame 34 _3. The end separating portions are fitted into the fitting recesses 37 of the main frame 32, respectively.

Next, the operation of the first embodiment will be described. The stiffener 28 is formed of the first extruded material 36, both ends thereof are connected to the hinge portions 29, 29, respectively, and the intermediate portion is the anchor portion 30. The main frame 32 to be connected, the first and second outer peripheral frames 33 ₁ and 33 ₂ formed of the second extruded material 39 ₁ and coupled to the peripheral edge of the outer panel 27, and the third extruded material 45. Main frame 32 and both outer frame 33
_1, 33 first to third coupling frame for coupling between ₂ 3
4 _1, and 34 _2, 34 _3, in which an auxiliary frame 35 for reinforcing the main frame 32 by bonding both ends to the main frame 32 while being formed by the third extruding material 45 _1.

According to the stiffener 28 having such a structure, each of the extruded materials 36, 39 and 45 has a closed cross-sectional shape and has a relatively high rigidity, so that the stiffener 28 is prevented from becoming large. You can The bending of each extruded member 36, 39 _1, 45 is relatively free, and freely change the shape of the stiffener 28 also for different bonnet of vehicles it is possible to provide versatility. Furthermore, each frame 32, 33 ₁ , 33 ₂ , 34 ₁
Since a space is provided between ˜34 ₃ and 353, the weight can be reduced, and the stiffener 28 can be configured without wasting material, so that the material yield can be improved. Becomes

Moreover, the edge bending portion 27 of the outer panel 27
a ₁ is the tip of the flange portion 39d provided in the second extruding material 39 ₁ constituting the first and second outer peripheral frame 33 _1, 33 _2, and so closely to the thick portion 39f of the distal end Since they are joined in the shape of a rope hem, excellent strength against deformation and crushing can be obtained, and the joining strength can be improved. Further, in performing the hemming process for forming the roped hem-shaped edge bend portion 27a _1, as is apparent from a comparison between the hemming process shown in FIG. 9 and the conventional hemming process shown in FIG. Since the thick portion 39f is provided at the tip, the pre-bending step shown in FIG. 18 (b) becomes unnecessary, and the number of hemming steps can be reduced.

16 and 17 show a second embodiment of the present invention, in which parts corresponding to those of the first embodiment are designated by the same reference numerals.

First and second outer peripheral frames 33 ₁ , 33
₂ is formed by an extruded material 39 ₂ shown in FIG. 17, and this extruded material 39 ₂ is engaged with a frame main portion 39a having a closed cross-sectional shape extending along the extruding direction 41 and engaging claws on the inner side of the tip. A fitting recess 40 having a substantially U-shaped cross section opened to one side by the overhanging portions 39b and 39c having 39f is provided along the extrusion direction 41, and the tip is rounded to project to the other side. The flange portion 39d is in the extrusion direction 41.
It is provided along with.

Thus, the peripheral portion of the outer panel 27 is first
When connecting to the second outer peripheral frames 33 ₁ and 33 ₂ , the edge bent portion 27a ₂ of the outer panel 27 is
It is joined to the flange portion 39d in a flat hem shape so as to be in close contact with the rounded tip of the flange portion 39d, and also according to the second embodiment, excellent strength against deformation and crushing can be obtained, and the joint strength Can also be improved.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims. It is possible to do.

[0034]

As described above, according to the first aspect of the present invention, the reinforcing material includes the main portion having the closed cross-sectional surface shape, the flange portion extending laterally from the main portion, and the tip of the flange portion. It is made of an extruded material having a thick part that bulges inward, and the edge bending part of the outer panel is connected to the flange part with a rope hem shape that is in close contact with the outer surface of the thick part. It can be improved by the closed cross-section structure of the extruded material, and by eliminating the gap between the tip and the edge bending part of the flange part, excellent strength against deformation and crushing can be obtained, and the bond strength can be improved. You can In addition, the roped hem-shaped edge bending portion can be formed along the thick portion, so that the number of processing steps during hemming can be reduced.

According to the second aspect of the present invention, the reinforcing material is an extruded material having a main portion having a closed cross-sectional surface shape and a flange portion that extends laterally from the main portion and has a rounded tip. Since the edge bending portion of the outer panel is joined to the flange portion in a flat hem shape that is in close contact with the tip of the flange portion, the rigidity of the outer panel can be enhanced by the closed cross-section structure of the extruded material, and the flange portion By eliminating the gap between the tip and the edge-bent portion, excellent strength against deformation and crushing can be obtained, and the bonding strength can be improved.

[Brief description of drawings]

FIG. 1 is a front perspective view of a vehicle with a hood opened.

FIG. 2 is a bottom view of the bonnet.

FIG. 3 is a perspective view of a first extruded material.

FIG. 4 is a perspective view of a second extruded material.

FIG. 5 is an enlarged view of part 5 in FIG.

6 is a sectional view taken along line 6-6 of FIG.

FIG. 7 is an enlarged view of part 7 of FIG.

8 is a sectional view taken along line 8-8 of FIG.

FIG. 9 is a cross-sectional view showing a hemming process.

FIG. 10 is a perspective view of a third extruded material.

11 is a cross-sectional perspective view of a portion taken along line 11-11 of FIG.

FIG. 12 is a perspective view showing an initial process of processing the coupling frame.

FIG. 13 is a perspective view showing an intermediate processing step of the coupling frame.

FIG. 14 is a perspective view showing a finished state of the combined frame.

15 is a sectional perspective view of a portion taken along line 15-15 of FIG.

FIG. 16 is a cutaway perspective view of the second embodiment.

FIG. 17 is a perspective view showing an extruded material according to a second embodiment.

FIG. 18 is a cross-sectional view showing a conventional roped hem hemming process.

[Explanation of symbols]

27 ... outer panel 27a _1, 27a ₂ ... crimp 33 _1, 33 ₂ ... outer peripheral frame 39 ₁ as a reinforcing material, 39 ₂ ... extrusions 39d ... flange portion 39f · ·・ Thick part

Claims (2)

[Claims] 1. A reinforcing material (33 ₁ , 33 ₂ ) for reinforcing an outer panel (27) from its inner surface side by an edge bent portion (27a ₁ ) formed by hemming the edge of the outer panel (27). ) Flange portion (39d)
In the panel reinforcing structure connected to the
3 ₁ , 33 ₂ ) is a main part (39
extruded material (3) having a), a flange portion (39d) extending laterally from the main portion (39a), and a thick portion (39f) protruding inward at the tip of the flange portion (39d).
9 ₁ ), characterized in that the edge bent portion (27 a ₁ ) of the outer panel (27) is connected to the flange portion (39 d) in a rope hem shape in close contact with the outer surface of the thick portion (39 f). Reinforced structure. 2. A reinforcing material (33 ₁ , 33 ₂ ) for reinforcing an outer panel (27) from its inner surface side by an edge bending portion (27a ₂ ) formed by hemming the edge of the outer panel (27). ) Flange portion (39d)
In the panel reinforcing structure connected to the
3 ₁ , 33 ₂ ) is a main part (39
and a) consists of the main part (flange tip rounded extends laterally from 39a) (39d) and an extruded material having a (39 _2), crimp of the outer panel (27) (27a ₂ ) Is joined to the flange portion (39d) in a flat hem shape in close contact with the tip of the flange portion (39d).