JP3311107B2 - Panel reinforcement structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer panel having a bend formed by hemming of an edge of the outer panel, the flange being provided on a reinforcing member for reinforcing the outer panel from its inner surface. It relates to a panel reinforcement structure.

[0002]

2. Description of the Related Art Conventionally, such a structure is disclosed in
Japanese Patent Application Laid-Open No. 2880928 and Japanese Patent Publication No. Sho 63-2690.

[0003]

SUMMARY OF THE INVENTION The above-mentioned JP-A-2-280
According to Japanese Patent No. 928, a hemming process applied to the edge of the outer panel connects the edge bent portion of the rope-to-hem shape to the flange portion of the reinforcing member. However, a gap is provided between the edge bent portion and the tip of the flange portion. Therefore, it is difficult to say that the bonding force is sufficient. Further, in performing the hemming processing of the rope hem shape, as shown in FIG. 16 , a bending step of bending the edge of the outer panel 27 'at a substantially right angle (step of FIG. 16 (a)) and a step of bending the bent edge are performed. A pre-bending step of pre-bending into a curved shape (step of FIG. 16 (b)), and the pre-bending section is raised to about 45 degrees with the flange 33a 'of the reinforcing member 33' in contact with the outer panel 27 '. A folding step (FIG. 16 (c)) and a joining step (FIG. 16 (d)) for joining the edge bent portion 27a 'of the rope to hem shape to the flange portion 33a' so as to wrap the tip of the flange portion 33a '. ) Must be performed in this order, and the man-hour for hemming has been relatively large.

In Japanese Patent Publication No. 63-2690, a flat hem-shaped edge bent portion is joined to a flange portion of a reinforcing member by hemming processing performed on an edge portion of an outer panel. As in the case of (1), since a gap is formed between the edge bent portion and the tip of the flange portion, the strength against deformation or crushing is insufficient, and it cannot be said that the bonding force is sufficient.

The present invention has been made in view of the above-mentioned circumstances, and has an edge bent portion of an outer panel brought into close contact with a front end of a flange portion of a reinforcing material to obtain excellent strength against deformation and crushing, and to provide bonding strength. It is an object of the present invention to provide a panel reinforcement structure capable of reducing the number of processing steps when performing hemming of a rope hem shape.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, a reinforcing member includes a main portion having a closed cross- sectional shape, and a reinforcing member having a closed cross- sectional shape. Extending to the outer side
An extruded material having a flange portion one surface of which is in intimate contact with the inner surface of the panel , and a thick portion protruding inward of the outer panel from the other surface of the flange portion at the tip of the flange portion, bent portion is coupled to the flange portion in intimate contact with Roputohemu shape on the outer surface of the thick portion.

[0007]

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

[0008] FIGS. 1 to 15 shows the actual施例of the present invention, FIG. 1 is a front perspective view of a vehicle with open hood, FIG. 2 is a bottom view of the hood, Figure 3 a 1 is a perspective view of an extruded material, FIG. 4 is a perspective view of a second extruded material, and FIG.
6 is a sectional view taken along line 6-6 of FIG. 5, FIG. 7 is an enlarged view of section 7 of FIG. 2, FIG. 8 is a sectional view taken along line 8-8 of FIG. 7, and FIG. 10, FIG. 10 is a perspective view of a third extruded material, FIG. 11 is a sectional perspective view of a portion along line 11-11 in FIG. 2, FIG. 12 to FIG. FIG. 15 is a sectional perspective view of a portion taken along line 15-15 of FIG.

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

Referring also to FIG. 2, stiffener 28
Is a main frame 32 having both ends connected to both hinge portions 29, 29 and an intermediate portion connected to the anchor portion 30, and a first reinforcing member connected to both side edges and a front edge of the outer panel 27. Outer frame 33
_1, a second outer peripheral frame 33 ₂ as a reinforcing member that is coupled to the rear edge of the outer panel 27, the main frame 32
And a pair of first outer frames 33 connecting the first outer frame 33 ₁ and the first outer frame 33 ₁ .
A pair of second connecting frames 34 ₂ , 34 ₂ connecting the connecting frames 34 ₁ , 34 ₁ to the main frame 32 and the first outer peripheral frame 33 _1, and connecting a pair of the main frame 32 and the second outer peripheral frame 33 ₂ to each other. a third coupling frame 34 _3, an auxiliary frame 35 for reinforcing the main frame 32 by bonding both ends to the main frame 32.

In FIG. 3, a main frame 32 has a first extruded member 36 formed by extruding an aluminum alloy or the like.
Formed by The first extruded member 36 has a symmetrical left and right cross-sectional shape. The first extruded member 36 has a rectangular frame-shaped main portion 36a having a closed cross-section, and one side of the frame main portion 36a opposed to the frame main portion 36a. A pair of overhangs 36 extending to
b, 36c, a pair of overhanging portions 36d, 36e extending from the frame main portion 36a to the other side so as to face each other, and engaging claws provided inside the distal ends of the overhanging portions 36b to 36e, respectively. 36f... The protrusions 36b and 36c having the engagement claws 36f on the inside of the distal end form a fitting concave portion 37 having a substantially U-shaped cross section opened to one side, and the engagement claw on the inside of the distal end. 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 member 36 is provided with fitting recesses 37, 37 extending along the extrusion direction on both sides of the frame main portion 36a having a closed cross section extending along the extrusion direction 38, respectively.

The first extruded member 36 is provided in the fitting recess 3.
The main frame 32 is formed by bending the central portion at the top such that the central portions 7 and 37 are arranged on both the inner and outer sides.

[0013] In FIG. 4, the first and second outer peripheral frame 33 _1, 33 ₂ is formed by the second extruding material 39 ₁ made of an aluminum alloy or the like by extrusion molding. 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 It is connected to the main portion 36a and extends to the opposite side to the overhang portion 39b, and one surface thereof is in close contact with the outer surface of the outer panel 27.
Of the flange 39d, engagement claws 39e provided on the inside of the distal ends of the overhangs 39b, 39c, respectively, and the outer end of the flange 39d at the distal end of the flange 39d.
Thick portion 39 which protrudes hemispherically inwardly of the panel 27
f. Thus, the second extruded member 39 ₁ has a closed-section frame main portion 39 extending along the extrusion direction 41.
a overhang portion 39 having an engagement claw 39f on the inside of the tip end;
A fitting concave portion 40 having a substantially U-shaped cross section opened to one side by b and 39c is provided along the extrusion direction 41, and a flange portion having a thick portion 39f at the tip and extending to the other side. 39d is provided along the extrusion direction 41,
The fitting recess 40 is formed in the same shape as the fitting recess 37 of the first extruded member 36.

[0014] 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.

5 and 6, the hinge 29
Is the frame main part 3 at the end of the main frame 32.
A coupling arm portion 29a which is inserted into the inside 6a, coupling arms 29b to be engaged with the first outer peripheral frame 33 ₁ of the fitting recess 40
When, which comprises a coupling arm portion 29c to be engaged with the second outer peripheral frame 33 _{and second} mating recesses 40, each coupling arms 29a~29c is, the screw member 42 ... by the main frame 32, first It is fastened to the peripheral frame 33 ₁ and the second outer peripheral frame 33 _2.

Referring to FIGS. 7 and 8, the anchor 30
It includes a coupling arm portion 30a which is engaged in the outer side of the fitting recess 37 in the intermediate portion of the main frame 32, coupling arms 3 to be engaged with the first outer peripheral frame 33 ₁ of the fitting recess 40
0b, the two connecting arms 30a, 30b
There are fastening screw members 43 ... by the main frame 32 and the first outer peripheral frame 33 _1.

[0017] Incidentally, the peripheral edge of the outer panel 27 is joined by hemming to ₂ first and second outer peripheral frame 33 _1, 33. That is, the first and second
The outer portion of the outer peripheral frame 33 _1, 33 _2, as shown in FIGS. 6 and 8, which flange portion 39d ... are provided, their flanges 39 ... thick portion 3 of the tip of
9f ... by hemming the peripheral edge of the outer panel 27 in accordance with the peripheral portion of the outer panel 27 is processed as a crimp 27a ₁ of Roputohemu shape,
It said edge bent portion 27a ₁ is the first and second outer peripheral frame 33
_1, 33 ₂ of the flange portion 39 ... will be coupled to.

[0018] In FIG. 9, the outer panel 27, when bound to its leading edge and the first outer peripheral frame 33 on both side edges subjected to hemming of Roputohemu shape _1, first, as shown in FIG. 9 (a), the Outer panel 27
Are held between the upper and lower dies 55 and 56, and the
The edges of the outer panel 27 protruding from the fifth and 56 are bent at substantially right angles by a bending mold 57 to form bent portions 27b.
Is carried out. Next, as shown in FIG. 9B, the outer panel 27 and the first outer peripheral frame 33 ₁
Are sandwiched between upper and lower dies 58 and 59 in a state where they are in close contact with each other.
4 along the thick portion 39f at the tip of the flange portion 39d.
A turn-back step of turning up to about 5 degrees is performed. Thereafter, as shown in FIG. 9 (c), the press-molding die 61 having a pressing surface 61a corresponding to the distal end shape of the flange portion 39d including the thick portion 39f is used to form an edge bent portion 27a in a rope to hem shape closely contacting the thick portion 39f. ₁ is formed while being connected to the tip of the flange portion 39d.

[0019] The outer panel 27, also when subsequently binds to Roputohemu ₂ second peripheral frame 33 is subjected to hemming shape edge, the same process as the above process is performed.

In FIG. 10, the first combined frame 3
4 _1, the second combined frame 34, _second and third coupling frame 34
₃ and the auxiliary frame 35 are formed by a third extruded member 45 formed by extruding an aluminum alloy or the like. The third extruded member 45 is formed symmetrically left and right. A pair of fitting portions 47, 47 extending along the extrusion direction 46 of the three extruded members 45 are connected to each other by a connecting portion 48, and both fitting portions 47, 47 are connected to the first and second fitting portions 47, 47, respectively. Fitting recesses 37, 40 of extruded members 36, 39
It is formed so as to have a rectangular closed cross-sectional shape so as to be able to be fitted into the connector. Moreover, the fitting recesses 37 of the first extruded member 36 are provided on the outer surfaces of the four corners of the fitting portions 47, 47.
Engagement recess 47a which can engage the engaging claws 39e of the fitting recess 40 in the engagement pawls 36f and the second extruding material 39 ₁
... are provided respectively.

Referring again to FIG.
Numeral ₁ is obtained by branching both ends into a fork and bending the branch portion. At the branch portion, the fitting portions 47, as shown in FIG.
3 with fitted respectively to the _first fitting recess 40, similar mating fitting portion 47 ... main frame structure 32
By being fitted respectively to the fitting recess 37 of, between ₁ mainframe 32 and the first outer peripheral frame 33 is first
It is combined in the combined frame 34 _1.

That is, as shown in FIG. 12, a cut 49 is made in the connecting portion 48 of the third extruded member 45 from one end thereof to an appropriate position, and then, as shown in FIG.
Bend 7 and 47 processed so as to separate from each other, further, as shown in Figure 14, the fitting recess 37 of the first outer peripheral frame 33 ₁ of the fitting recess 40 and the main frame 32 at the fitting portion 47 separated The engaging claw 3
Grooves 50 for engaging 9f, 36f are provided.

In FIG. 15, the second combined frame 34 ₂
Are those formed by cutting the third extruded material 45 with a relatively short length, the fitting recess 37 of the end portion outer side of the main frame 32, a first peripheral frame 33 ₁ of the hinge portion 29 side end portion The fitting portions 47 are fitted into the fitting recess 40 on the inner side, respectively. Thus, both engagement claws 36f of the fitting recess 37 are formed.
The engaging claws 39e of the fitting recess 40 are respectively engaged with the locking recesses 47a inside the fitting portions 47.

Referring again to FIG. 2, the third combined frame 34
₃ is formed by separating both ends of the third extruded member 45 into a forked shape and bending the separated portion. One end side separated portion is fitted into the fitting recess 37 of the main frame 32 and the first
Fitted with the same structure as the fitting structure of the coupling frame 34 first peripheral frame 33 ₁ of _1, the other end separation unit, fitted to the intermediate portion of the second peripheral frame 33 _second fitting recess 40 And the leading end is fitted into the fitting recess 3 of the main frame 32.
7 respectively.

The auxiliary frame 35 has its separate part bending processing to separate the two ends of the third extruded material 45 to each bifurcated, made by bending a middle portion so as to straddle the third coupling frame 34 ₃ , The two end separation portions are fitted into fitting recesses 37 of the main frame 32, respectively.

Next, the operation of the first embodiment will be described. The stiffener 28 is formed by a first extruded material 36, both ends of which are connected to both hinge portions 29, 29, and an intermediate portion is connected to the anchor portion 30. It is formed by the main frame 32 to be connected, the first and second outer peripheral frames 33 ₁ and 33 ₂ formed by the second extruded material 39 ₁ and connected to the peripheral portion of the outer panel 27, and the third extruded material 45. And the main frame 32 and both outer peripheral frames 33
First to third combined frames 3 connecting between ₁ and 33 ₂
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 configuration, each of the extruded members 36, 39, and 45 has a closed cross-sectional shape, and has relatively high rigidity. Can be. The bending of the extruded members 36, 39 ₁ and 45 is relatively free, and the stiffener 28 can be freely changed in shape for bonnets of different types of vehicles to have versatility. Further, each frame 32, 33 ₁ , 33 ₂ , 34 ₁
Since the space between ３４ 343 and ₃ 35 is an empty space, the weight can be reduced, and the stiffener 28 can be configured without wasting the material wastefully, 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 the joints are formed in a rotohem shape, excellent strength against deformation and crushing can be obtained, and the joint strength can be improved. The carrying is carried out hemming forming a crimp 27a ₁ of Roputohemu shape, a hemming process shown in FIG. 9, as is apparent from a comparison of the conventional hemming step shown in FIG. 16, the flange portion 39d by thick portion 39f at the tip is provided, which pre-bending step shown is not required in FIG. 16 (b), the it is possible to reduce the hemming steps.

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

[0030]

As described above, according to the first aspect of the present invention, the reinforcing member has a main portion having a closed cross- sectional shape, and extends laterally from the main portion, and one surface is in close contact with the inner surface of the outer panel. a full <br/> flange portion to the other surface of the flange portion at the tip of the flange portion
It consists extruded material having a thick portion which is raised inward side of the outer panel than, the crimp of the outer panel is coupled to the flange portion in intimate contact with Roputohemu shape on the outer surface of the thick portion, the outer Panel rope hem shape
Of the edge bend that forms
Hemming process is possible without gap along the thick part
As a result, deformation and crushing of the outer panel
Outer panel and
Closed cross section of extruded material due to increased bond strength between reinforcements
The structure is also effective in improving the rigidity of the reinforcing plate itself.
In addition, the overall effect of outer panel rigidity and strength
Can be increased.

In addition, the rope hem of the outer panel
The shape is extruded so that it protrudes inward at the tip of the flange.
It can be easily processed along the formed thick part.
It is not necessary to specially hemming the reinforcement (ie
The processing object can be limited to the outer panel)
Together, it greatly contributes to reduction of processing man-hours and processing labor.
Can be given.

Also, a special bulge is formed inward at the tip of the flange portion.
The raised thick part is replaced with a reinforcing material main part having a closed cross-sectional shape.
Extrusion molding can be performed simultaneously and precisely with the flange.
Because it is possible, the protruding shape of the thick part and the closure of the main part of the reinforcing material
The surface shape can be selected with a high degree of freedom.
The degree of freedom in designing the outer panel
You.

[Brief description of the drawings]

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

FIG. 2 is a bottom view of the hood.

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 a part of FIG. 2;

FIG. 6 is a sectional view taken along line 6-6 in FIG. 5;

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

FIG. 8 is a sectional view taken along line 8-8 in FIG. 7;

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

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

FIG. 11 is a sectional perspective view of a portion along line 11-11 in FIG. 2;

FIG. 12 is a perspective view showing an initial processing step of the connecting frame.

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

FIG. 14 is a perspective view showing a completed state of the processing of the coupling frame.

FIG. 15 is a sectional perspective view of a portion taken along line 15-15 of FIG. 2;

FIG. 16 shows a conventional rope hemming process.
It is sectional drawing.

[Explanation of symbols]

27 ... outer panel 27a _1, 27a ₂ ... crimp 33 _1, 33 ₂ ... outer peripheral frame 39 ₁ ... extrusions 39d ... flange portion 39f ... thick as a reinforcing material Department

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-293921 (JP, A) JP-A-2-280928 (JP, A) JP-A-56-41032 (JP, A) JP-A-5- 155355 (JP, A) JP-A-5-193360 (JP, A) JP-A-3-81024 (JP, A) JP-A-56-132170 (JP, U) JP-A-58-179946 (JP, U) Japanese Utility Model Showa 58-6668 (JP, U) Japanese Utility Model Showa 58-28737 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62D 25/10 B21D 19/08

Claims (1)

(57) [Claims] An edge bending portion (27a ₁ ) formed by hemming an edge portion of an outer panel (27) serves as a reinforcing member (33 ₁ , 33 ₂ ) for reinforcing the outer panel (27) from its inner surface side. ) Flange section (39d)
In panel reinforcing structure coupled to, reinforcement material (33 _1, 33 ₂₎ includes a main portion (39a) having a closed section, extending main portion from (39a) laterally Au
Flanges one surface to the inner surface of Tapaneru (27) are in close contact with (39d), said hula at the tip of the flange portion (39d)
Outer panel (27) than the other side of the flange (39d)
And an extruded material (39 ₁ ) having a thick portion (39f) protruding inwardly of the outer panel (27), and an edge bent portion (27a ₁ ) of the outer panel (27) is in close contact with an outer surface of the thick portion (39f). Roped hem shape
Panel reinforcement structure, characterized in that coupled to the flange portion (39d).