0001]The present invention relates to an exterior panel of the automobile.
BACKGROUND
[0002]Conventionally, for example, Patent Document 1 below, and possible weight reduction of the parts itself, assuming technology to provide a reinforcement member of the vehicle body outer panel outside of the vehicle body panel for a high surface rigidity improvement effect of the vehicle is described ing.
CITATION
Patent Document
[0003]
Patent Document 1: JP 2011-251624 JP
Summary of the Invention
Problems that the Invention is to Solve
[0004]
　In recent years, external material used for the exterior panel of an automobile is the request of such weight reduction, there is a direction that is more thinned, there is a problem that tensile rigidity is reduced by thinning. Thus, for example, when you press the like by hand door panel, there is a problem that the outer package is thus easily deformed.
[0005]
　More particularly, tensile rigidity of the conventional face panel, the thickness of the outer package (such as curvature surface) shape, a conventional reinforcing component into character lines, and tensile rigidity weakest site (e.g. the center of the panel) of it was happy with the necessary performance depending on the installation. On the other hand, when carrying out the thinning of the outer package for the purpose of weight reduction, only such a plate than the thickness of the measures is difficult to compensate for the shortage of the tension rigidity.
[0006]
　In contrast, for example, as disclosed in Patent Document 1, thin some techniques to try to improve the conventional reinforcing component in terms of tensile rigidity improved, for example, from the original thickness 0.7mm of the outer package to 0.5mm or less as reduction, increasing the degree of thinning, in order to compensate the entire face panel to target shortage tension rigidity becomes large required number of reinforcing components, there is a problem that weight reduction is eroded. Also, by the required number of these reinforcing component increases, even if the lead to weight increase conversely.
[0007]
　As described above, in the structure of the conventional face panel, compensate the tensile rigidity shortage at the time of thinning the exterior material, and to obtain a weight reduction effect which is the original purpose of the outer package thinning is difficult.
[0008]
　The present invention has been made in view of the above problems, it is an object of the present invention is to provide which can compensate for the lack tensile rigidity, the exterior panel of an automobile.
Means for Solving the Problems
[0009]
　In order to solve the above problems, according to an aspect of the present invention, the outer package, and contact along automobile inner surface of the outer member, in a cross section perpendicular to the longitudinal direction of the orthogonal direction of the outer member second moment is 15000 4 automotive exterior panel with a reinforcing member or less is provided.
[0010]
　The yield stress of the reinforcing member may be more than 500 MPa.
[0011]
　Further, the reinforcing member intersecting portion is provided in the direction perpendicular to the second moment of the outer member in a cross section perpendicular to the longitudinal direction of said reinforcing member extending from the intersection portion 15000 4 be not more than good.
[0012]
　Further, the intersecting portion may be provided at two or more locations.
[0013]
　Further, the reinforcing member may be one that is in close contact with the outer member in more than one third of the area of ​​the entire length.
[0014]
　Further, the outer member has a concave curve portion which is concavely curved when viewed from the outside of the vehicle, the reinforcing member overlapping the concave curve portion may be one that is in close contact with the outer package.
[0015]
　Further, the reinforcing member may be one crossing the external material.
[0016]
　Further, the reinforcing member may be one that is joined to the outer member.
[0017]
　Further, the reinforcing member is out of the three line segments obtained by any of the longest line segment a line connecting the two points divided into three equal parts on the contour of the outer member, positioned in the center line the may be one through inner side than a circle whose diameter.
[0018]
　Further, between the first side and second side opposite of the outer member, a plurality of the reinforcing member is disposed, at least one of the reinforcing member intermediate said first side and said second side disposed on the first side than the line, at least one of said reinforcing member is disposed on the second side than the median line, the extending direction of each of said reinforcing member from said first side first a direction along the closer one of the two sides, the first between the two adjacent reinforcing members distance second to the reinforcing member closest to said first side or said second side it may be shorter than the distance.
[0019]
　Further, angle close to one said reinforcing member of said reinforcing member and said first side and said second side may be within 30 °.
[0020]
　The first distance is the adjacent two of the reinforcing member, the distance between two points and a line segment connecting the midpoint of the midpoint between the second side of the first side, intersects it may be.
[0021]
　The second distance is connecting the midpoint of the first side, and a midpoint of the first side and the nearest said reinforcing member and said second side and the midpoint of the first side the lines and may be a distance between the point of intersection.
[0022]
　The second distance is connecting the midpoint of the second side, and a midpoint of the second side closest the reinforcing member and the second side and the midpoint of the first side the lines and may be a distance between the point of intersection.
Effect of the invention
[0023]
　According to the present invention described above, it is possible to compensate for the lack tensile rigidity.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024]
Is a schematic view showing a state viewed exterior panel from the rear side of the vehicle according to FIG. 1 embodiment.
[Figure 2] A schematic view showing a conventional structure for comparison, is a schematic diagram showing a configuration of the inside of the outer package is a door impact bar and reinforcement disposed.
3 is a schematic diagram showing a variation of the arrangement of the reinforcing member.
4 is a schematic diagram showing a variation of the arrangement of the reinforcing member.
5 is a schematic diagram showing a variation of the arrangement of the reinforcing member.
6 is a schematic diagram showing a variation of the arrangement of the reinforcing member.
7 is a schematic diagram showing a variation of the arrangement of the reinforcing member.
8 is a perspective view showing the configuration of a reinforcing member.
[Figure 9] is a first reinforcing member is disposed in the vertical direction of the outer package is a schematic view showing a second reinforcing outer panel member is disposed (door panel) in the longitudinal direction of the casing 110.
It is a schematic view showing a state seen from an arrow A direction of FIG. 10 FIG.
11 is a perspective view showing in detail the intersection of the first reinforcing member and the second reinforcing member in FIG.
12 is a perspective view showing in detail the intersection of the first reinforcing member and the second reinforcing member in FIG.
In the configuration of FIG. 13 FIG. 9 is a schematic diagram showing the direction of the cross-sectional configuration perpendicular to the longitudinal direction of the first and second reinforcing members.
For [14] FIGS. 9 and 10 is a characteristic diagram showing the relationship between the applied load and the displacement amount of the indenter 140 obtained by simulation for evaluating the tensile rigidity of the outer panel.
[15] assume the collision side of the car (the side collision) is a schematic view showing a state in which given load onto the outer panel load applying member.
In the configuration of FIG. 16 FIG. 9 was obtained by simulation for evaluating the performance of side impact of the outer panel, is a characteristic diagram showing the relationship between the stroke and the load when a load is applied by the load applying member 300 .
[17] The vehicle door panel when the outer panel is a schematic diagram showing an arrangement position in placing the reinforcing member in order to secure the tensile rigidity.
[18] The vehicle door panel when the outer panel is a schematic diagram showing another example of the arrangement position when placing the reinforcing member in order to secure the tensile rigidity.
[19] vehicle roof (the roof) when the outer panel is a schematic diagram showing an arrangement position in placing the reinforcing member in order to secure the tensile rigidity.
To the configuration shown in FIG. 20 FIG. 13 is a schematic diagram showing an example of bending the respective end portions of the plate on the other side.
DESCRIPTION OF THE INVENTION
[0025]
　Reference will now be described in detail preferred embodiments of the present invention. In the specification and the drawings, components having substantially the same function and structure are a repeated explanation thereof by referring to the figures.
[0026]
　First, referring to FIG. 1, the configuration of the automotive exterior panel according to an embodiment of the present invention. Figure 1 is a schematic view showing a state seen an exterior panel 100 of an automobile according to the present embodiment from the back side (inner side of the car). Illustrated here is a door panel as an exterior panel 100, the outer panel 100, fenders, hood, etc. roof may be a panel of other parts of the automobile.
[0027]
　As shown in FIG. 1, the outer panel 100 is composed of a casing 110 reinforcing member 120.. Casing 110, the thickness as an example is composed of a steel plate of about 0.4 mm. Casing 110 is the front side is curved so as to be convex. The curvature of the curved is along the vehicle height direction of the vehicle (vertical direction).
[0028]
　Reinforcement member 120 includes a first reinforcing member 122 disposed in the vertical direction, and a second reinforcing member 124 disposed in the vehicle length direction (horizontal direction) of the motor vehicle. The first reinforcing member 122 is curved to follow the curvature of the casing 110. The second reinforcing member 124 is extends substantially linearly, when casing 110 is curved is that following the curved shape. A first reinforcing member 122 second reinforcing member 124 are both in close contact with the casing 110, which is preferably bonded (adhered) to the casing 110.
[0029]
　Figure 2 is a schematic view showing a conventional structure for comparison. 2, the door impact bar 300 and reinforcement 310 is disposed inside the casing 110. 3 to 7 are views showing a vehicle door panel according to the present embodiment as an exterior panel 100. 3 to 7 are schematic views showing variations of the arrangement of the reinforcing member 120. In the example shown in FIG. 3 shows an example in which only the first reinforcing member 122 disposed vertically to the outer panel 100.
[0030]
　Further, in the example shown in FIG. 4 shows an example in which only the second reinforcing member 124 disposed in the longitudinal direction in the outer panel 100. Further, in the example shown in FIG. 5 shows a first reinforcing member 122 disposed vertically to the outer panel 100, an example in which a second reinforcing member 124 disposed in the front-rear direction. Further, in the example shown in FIG. 6 shows an example in which the radial reinforcing member 120 to the outer panel 100. Further, in the example shown in FIG. 7 shows an example in which intersects the reinforcing member 120 diagonally face panel 100.
[0031]
　Figure 8 is a perspective view showing the configuration of a reinforcing member 120. A first reinforcing member 122 basic configuration of the second reinforcing member 124 may be identical. 8 also shows a cross-sectional configuration perpendicular to the longitudinal direction of the reinforcing member 120. Reinforcing member 120 has a rectangular cross-section. The reinforcement member 120 is manufactured by bending a plate member 130. In the example shown in FIG. 8, the reinforcing member 120 is a square cross-sectional shape, one side is about 6 mm ~ 10 mm. Further, the thickness of the plate material 130 constituting the reinforcing member 120 is 0.8mm approximately as an example. The plate member 130 can be used steel.
[0032]
　As shown in FIG. 8, a predetermined gap is provided between the end portion 130a and the end portion 130b of the bent plate member 130. On the other hand, the end portion 130a and the end portion 130b may be in close contact. The end portion 130a and the end portion 130b may be joined by welding or bonding or the like. Preferably, the reinforcing member 120 has an end 130a, 130b is opposite to the surface on the surface is located is arranged so as to be in intimate contact with the casing 110. Thus, in the configuration in which the ends 130a, 130b are not joined, if the curved reinforcing member 120 is pushed from the outer direction of the face panel 100, end 130a, cross from 130b are cross-sectional shape collapse open since it is possible to prevent, it is possible to increase the rigidity of the outer panel 100. Further, if the reinforcing member 120 and the casing 110 are joined, the end portions 130a of the reinforcement member 120, 130b is the face positioned may be arranged so as to be bonded to the casing 110. By being joined to the casing 110, it is because it is possible to prevent the end portion 130a, is cross-shaped cross section is opened from 130b collapse. The cross-sectional configuration of the reinforcing member 120 is not limited to the structure of closed cross section as shown in FIG. 8, for example, cross section Ya trench (channel) shape surface opposite open to casing 110 it may be a hat shape shown in FIG. 20.
[0033]
　As described above, in the present embodiment, the first and second reinforcing members 122, 124 are in contact with the casing 110. Thus, the area of ​​each region surrounded by the contour of the first and second reinforcing members 122, 124, and casing 110 is to become smaller than the area of ​​the entire casing 110, an external force to the exterior member 110 acting since early tension is likely to occur when, it is possible to increase the tensile rigidity of the outer package 110. Furthermore, it is more preferable to bond the casing 110 and the reinforcing member 120, early tension generated by the exterior material 110 in the region between the reinforcing member 120 adjacent in casing 110 is deformed, more the tensile rigidity it can be further improved.
[0034]
　Reinforcing member 120, the direction of the second moment perpendicular to the longitudinal direction, 15000 4 are less, more preferably, 12000 mm 4 is less. So as to satisfy this condition, the material of the plate 130 of the reinforcing member 120, the plate thickness and cross-sectional shape is appropriately set. By satisfying this condition, it is possible to the reinforcing member 120 with a small cross section, can lead to significant weight gain even if the first and second reinforcing members 122, 124 have a plurality of arranged in order to increase the tensile rigidity without the efficiently can be improved tensile rigidity. Direction of the second moment perpendicular to the longitudinal direction of the reinforcing member 120 is small it is possible to reduce the cross-sectional shape, it is possible to reduce the weight per one reinforcing member 120, for tensile rigidity improving improved flexibility in the number and arrangement of the reinforcement member 120, but more efficiently can be improved tensile rigidity, in view of the workability when assembling the reinforcement member 120 to the outer panel 100, the cross-sectional secondary moment is 10 mm 4 may be as or more.
[0035]
　Moreover, the yield stress of the reinforcement member 120 is equal to or greater than 500 MPa. Accordingly, since the external force to the reinforcing member 120 can be prevented that the plastic deformation occurs even when working, it is possible to effectively lighter to ensure tensile rigidity.
[0036]
　The reinforcing member 120 is somewhat longer than is placed along the casing 110. Specifically, the reinforcement member 120 is in close contact with the casing 110 at one-third or more regions of the full length. By closely arranging the reinforcing member 120 to the casing 110, when the degree of thinning of the outer package 110 is large even (eg thinner from the original thickness 0.7mm to 0.5mm or less), tensile rigidity of the outer panel 100 it is possible to improve. More preferably, by joining in close contact the reinforcing member 120 and the casing 110, by applying a tensile force to the casing 110 during deformation of the casing 110, it is possible to further increase the tensile rigidity of the outer panel 100.
[0037]
　In particular, the first reinforcing member 122 is disposed vertically along the direction of the curvature of the casing 110. Thus, it is possible to improve the tensile rigidity of the curved convex curved portion so as to protrude toward the outside of the vehicle. Further, casing 110 has a concave curve portion curved to protrude toward the inside as viewed from the outside of the vehicle, the reinforcement member 120 overlapping the concave curve portion is in close contact with the casing 110. Concave curve portion than in the convexly curved portion for tensile rigidity against a load from the outside of the car is poor, that closely arranged reinforcing member 120 to the site, it can effectively improve the tensile rigidity of the entire face panel.
[0038]
　The reinforcing member 120 is configured so as to cross the casing 110 (transverse). In this embodiment, smaller second moment of the reinforcing member 120, the (larger elastic deformation zone) high yield stress. Therefore, in order to improve the tensile rigidity of the whole of the exterior panel 100, the reinforcing member 120 is suitably better to as long as possible.
[0039]
　In the example shown in FIG. 5, the cross section of the first reinforcement member 122 is a second reinforcing member 124 intersect is provided. Then, the direction of the second moment perpendicular to the longitudinal direction of the reinforcing member 120 extending from the intersections 15000 4 are as follows. When a cross section, the area of the region of the outer package sandwiched reinforcing member 120 extending from the intersection portion is narrower than the area of the face panel entire surface, the ratio of the thickness to the area sandwiched between the reinforcing member 120 is relatively to increase, it is possible to further improve the tensile rigidity. Thus, by providing the intersection, it is possible to effectively improve the tensile rigidity.
[0040]
　Also, by the intersection between two or more locations, each region between the reinforcing member 120 adjacent the casing 110 is further narrowed, since the ratio of the thickness to the area of ​​the individual regions is increased relatively, the tension rigidity can be further improved. Thus, it is possible to effectively improve the tensile rigidity
[0041]
　Further, at the intersection, by providing the recess 122a, the 124a to the first and second reinforcing members 122 and 124 as will be described later, with respect to the first reinforcement member 122 casing 110 of the second reinforcing member 124 the thickness of the perpendicular direction is reduced. Accordingly, even in a region including and neighboring intersections are brought into close contact with the first and second reinforcing members 122, 124 and casing 110 can be joined, it is possible to effectively improve the tensile rigidity.
[0042]
　It will now be described a preferred arrangement of the reinforcing member 120 to improve the tensile rigidity of the outer package 110. In casing 110, at its periphery, or other member is connected, to or supported by other members, tensile rigidity is relatively high. On the other hand, the central portion of the outer package 110, if it is not supported by the other member, tensile rigidity is low. Thus the securing tensile rigidity is important is mainly the central portion of the casing 110. Figure 17, similar to FIGS. 3 to 7, a vehicle door panel when the face panel 100 is a schematic view showing the arrangement position in placing the reinforcing member 120 in order to secure the tensile rigidity.
[0043]
　As shown in FIG. 17, in the center of the casing 110 of the outer panel 100, the virtual circle C is set to the reinforcing member 120 passes. Virtual circle C, of ​​the three line segments obtained by three equal a line segment L length D shown in FIG. 17, is a circle a line segment located in the center and the diameter (= D / 3) . Line segment L, of the line segments obtained by connecting any two points to be set to the contour of casing 110 (the edge of the outer circumference), the longest line segment. If the outer panel 100 is of the door panel, as shown in FIG. 17, the line segment L is diagonal lines connecting the diagonal of the door panel.
[0044]
　In terms of setting the imaginary circle C, as described above, the reinforcing member 120 according to this embodiment is arranged to pass through the inside of the virtual circle C. By arranging the reinforcing member 120 so as to pass through the virtual circle C, the outer panel 100 is fender (front or rear), hood, door panels, roof, etc. trunks, whatever the panel, the reinforcement member 120 thus passing near the center of the casing 110. Accordingly, in the vicinity of the center of the casing 110, it is possible to increase the tension rigidity.
[0045]
　Even when arranging a plurality of reinforcing members 120, at least one reinforcing member 120 is disposed so as to pass through the inside of the virtual circle C. Also, that two or more reinforcing members 120 are arranged to pass through the inside of the virtual circle C, it is also possible to increase the tensile rigidity in the vicinity of the center of the casing 110.
[0046]
　Figure 18 is a vehicle door panel when the face panel 100 is a schematic diagram showing another example of the position to place the reinforcing member 120 in order to secure the tensile rigidity.
[0047]
　In the example shown in FIG. 18, a plurality of reinforcing members 120 between the two sides 112, 114 that face of the outer package 110 is disposed. Although two reinforcing members 120 between FIG. 18 the two sides 112, 114 are disposed, three or more reinforcing members 120 may be disposed. Although the two opposing sides 112, 114 of the casing 110 in FIG. 18 is a vehicle length direction of the side of the door panel may be of the vehicle height direction sides. To intermediate lines L0 located midway between the sides 112 and sides 114, at least one reinforcing member 120 is disposed on the side 112 side of the median line L0. Further, with respect to the middle line L0, at least one reinforcing member 120 is disposed on the side 114 side of the median line L0. Then, the direction of each of the extension of the reinforcing member 120 is a direction along the closer one of the sides 112 and the side 114.
[0048]
　In the present embodiment, in the arrangement of the reinforcing member 120 shown in FIG. 18, the distance D1 between two adjacent reinforcing members 120 is shorter than the distance D2 to the reinforcing member 120 closest to the edge 112. The distance D1 between adjacent two reinforcing members 120 is shorter than the distance D3 to the reinforcing member 120 closest to the edge 114.
[0049]
　Usually, the outer panel 100 is supported by its contour or is connected to another member, or other member. Thus, relatively close to the region from the contour of the outer package 110 would be held by other members, tensile rigidity is relatively high. Therefore, it is possible to ensure a relatively long and tensile rigidity of the region along the edge 112 even when the distance D2 to the nearest reinforcement member 120 from the side 112. Similarly, it is possible to ensure a relatively long and tensile rigidity of the region along the even side 114 a distance D3 to the nearest reinforcement member 120 from the side 114.
[0050]
　Meanwhile, near the center of the middle line L0 of the outer package 110, since apart from the side 112 or side 114, side 112 or side 114 liable tensile rigidity is reduced than the region along the. Therefore, the distance D1 between two adjacent reinforcing members 120, by shorter than the distance D2 to the reinforcing member 120 closest to the edge 112, in the vicinity of the center of the middle line L0 of the outer package 110, tension it is possible to increase the rigidity. Similarly, the distance D1 between two adjacent reinforcing members 120, by shorter than the distance D3 to the reinforcing member 120 closest to the edge 114, in the vicinity of the center of the middle line L0 of the outer package 110, tension it is possible to increase the rigidity.
[0051]
　18, when the side 112 and the side 114 are not parallel, the value of the distance D1, D2, D3, depending on the position to be measured is different it is assumed. Therefore, the line segment L connecting the center point P2 of the middle point P1 and the side 114 of the side 112 P1-P2 is set and the line segment L P1-P2 point and the reinforcing member 120 intersects P3, seeking P4, D1 is the distance between P3-P4, D2 is the distance between P1-P3, D3 is a distance between P4-P2.
[0052]
　Further, in FIG. 18 shows the case where the reinforcing member 120 to the side 112 and the side 114 are substantially parallel to, the reinforcing member 120 to the side 112, 114 may not be parallel. In the present embodiment, the angle formed by the reinforcing member 120 and the side 112 close to the edge 112 is within 30 °. Further, the angle between the reinforcing member 120 and the side 114 close to the edge 114 is within 30 °. Thus, the reinforcement member 120, the sides 112, by a side angle near the reinforcing member 120 of the sides 114 to within 30 °, can be enhanced tensile rigidity in the vicinity of the sides 112 or edge 114 it is.
[0053]
　Figure 19 is a vehicle roof (the roof) when the face panel 100 is a schematic view showing the arrangement position in placing the reinforcing member 120 in order to secure the tensile rigidity. For panel disposed on the upper surface of the automobile, such as roof, vehicle height direction is not present in the panel. Vehicle height direction of the panel disposed on a vehicle side, such as door panels (vertical direction) corresponds to the vehicle width direction of the panel disposed on the upper surface of the automobile, such as roof (left-right direction). In the example shown in FIG. 19, similarly to FIG. 18, three reinforcing members 120 between the two sides 112, 114 that face of the outer package 110 is disposed. Further, with respect to the middle line L0 located midway between the sides 112 and sides 114, at least one reinforcing member 120 is disposed on the side 112 side of the median line L0. Further, with respect to the middle line L0, at least one reinforcing member 120 is disposed on the side 114 side of the median line L0. Then, the direction of each of the extension of the reinforcing member 120 is a direction along the closer one of the sides 112 and the side 114.
[0054]
　Similar to Figure 18, also in the arrangement of the reinforcing member 120 shown in FIG. 19, the distance D6, D7 between two adjacent reinforcing members 120 is shorter than the distance D8 to the reinforcing member 120 closest to the edge 112. The distance D6, D7 between two adjacent reinforcing members 120 is shorter than the distance D9 to the reinforcement member 120 closest to the edge 114.
[0055]
　Also in FIG. 19, relatively close to the region from the contour of the outer package 110 is connected to the contour or contour will be retained by other member that supports the, tensile rigidity is relatively high. Therefore, it is possible to ensure a relatively long and tensile rigidity of the region along the edge 112 be the distance D8 of the nearest reinforcement member 120 from the side 112. Similarly, it is possible to ensure a relatively long and tensile rigidity of the region along the even side 114 a distance D9 the nearest reinforcement member 120 from the side 114.
[0056]
　Meanwhile, near the center of the middle line L0 of the outer package 110, since apart from the side 112 or side 114, side 112 or side 114 liable tensile rigidity is reduced than the region along the. Therefore, the distance D6, D7 between two adjacent reinforcing members 120, by shorter than a distance D8 to the reinforcing member 120 closest to the edge 112, in the vicinity of the center of the middle line L0 of the outer package 110 , it is possible to increase the tension rigidity. Likewise, the distance D6, D7 between two adjacent reinforcing members 120, by shorter than the distance D9 to the reinforcement member 120 closest to the edge 114, in the vicinity of the center of the middle line L0 of the outer package 110 , it is possible to increase the tension rigidity.
[0057]
　Also in FIG. 19, a line segment L connecting the center point P2 of the middle point P1 and the side 114 of the side 112 P1-P2 is set and the line segment L P1-P2 that each reinforcing member 120 and the cross seek P4, P5, P6. Then, D6 is the distance between P4-P5, D7 is the distance between P5-P6, D8 is the distance between P1-P4, D9 is the distance between P6-P2.
[0058]
　Also in FIG. 19, the edges 112 and 114 closer to the reinforcing member 120, by an angle between the reinforcing member 120 within 30 °, can be enhanced tensile rigidity in the vicinity of the sides 112 or edge 114 it is.
[0059]
　Figure 13 is a schematic diagram showing the direction of the cross-sectional configuration perpendicular to the longitudinal direction of the first and second reinforcing members 122, 124. As shown in FIG. 13, the first and second reinforcing members 122, 124 has a rectangular cross-sectional shape, vertical 16mm approximately as an example, it is about the horizontal 10 mm. Similar to FIG. 8, first and second reinforcing members 122, 124 is constituted by bending the plate member 130, the end portion 130a and the end portion 130b is opposed. The first and second reinforcing members 122, 124 may not necessarily be without the same cross-sectional shape (i.e. the second moment), for example, one of the reinforcing member is a rectangular cross-sectional shape as shown in FIG. 13, the other one of the reinforcing members may be a square cross-sectional shape as shown in FIG. When the first and second reinforcing members 122, 124 are respectively plural arrangement, each of the first reinforcing member 122 may be not always the same cross-sectional shape, similarly the second reinforcement each of the members 124 may be not necessarily the same cross-sectional shape. This is because it can be obtained more efficiently the effects of the effects and weight reduction of tensile rigidity improvement of the exterior panel 100.
[0060]
　In the configuration shown in FIG. 13, the short side of the rectangular cross-sectional shape is in close contact with the casing 110. Thus, in order to ensure the desired cross-sectional second moment, it is possible to constitute a reinforcing member 120 having the most efficient cross-section.
[0061]
　Figure 20 is to the configuration shown in FIG. 13 is a schematic diagram showing an example of bending on the opposite side of each end portion 130a and the end portion 130b of the plate 130. The shape of FIG. 20 referred to as a hat shape.
[0062]
　In the structure shown in FIG. 20, the short side of the rectangular cross-sectional shape is in close contact with the casing 110. Thus, in order to ensure the desired cross-sectional second moment, it is possible to constitute a reinforcing member 120 having the most efficient cross-section.
[0063]
　14, in the configuration example of FIGS. 9 and 10, in order to evaluate the tensile rigidity is a characteristic diagram showing the relationship between the applied load and the displacement amount of the indenter 140 obtained by simulation. 9, the first reinforcing member 122 is disposed in the vertical direction of the casing 110, there are schematic views showing an outer panel 100 that the second reinforcing member 124 is disposed in the longitudinal direction of the casing 110 (door panel) Te is shown in detail the configuration of FIG. Further, FIG. 10 is a schematic view showing a state seen from an arrow A direction in FIG. 9, but shows a state viewed outer panel 100 from the front side (from the outside of the car), it shows a first reinforcing member 122 in a transparent state the casing 110 of the second reinforcing member 124 . Further, the indenter 140 shown in FIG. 9, in the simulation shown in FIG. 14 is a member for pressing the outer panel 100. In the simulation results shown in FIG. 14, when the thickness of the casing 110 is not bonded to the first reinforcing member 122 by 0.4mm the second reinforcing member 124 to the casing 110 (Inventive Example 1, the characteristics indicated by the solid line) If, when joined to the first reinforcing member 122 and the second reinforcing member 124 to the casing 110 shows (Inventive example 2, the characteristics indicated by the two-dot chain line). Further, the simulation results shown in FIG. 14, for comparison, (dashed line) characteristics when the thickness of the casing 110 there is no reinforcing member in 0.7 mm, the reinforcing member in a thickness of the outer package 110 is 0.4mm also shows characteristic (broken line) when there is no.
[0064]
　The thickness of a typical automobile exterior panels currently used is about 0.7 mm, which corresponds to the characteristic of the chain line. As shown in FIG. 14, the first reinforcing member 122 and the invention Example 2 (two-dot chain line) formed by joining a second reinforcement member 124 to the casing 110, the reinforcing member in 0.7mm thickness of the casing 110 compared with the characteristics in the absence (dashed line), the displacement amount with respect to the applied load is equivalent above results were obtained. In particular, the invention example 2, when the load exceeds 80 [N], is lowered than the characteristic amount of displacement one-dot chain line against the applied load. Further, the characteristics of the invention Example 1 not bonded to the first reinforcing member 122 and the second reinforcing member 124 to the casing 110 (solid line), the displacement amount with respect to the applied load is slightly greater than the characteristic of the chain line, the applied load there were comparable to properties of one-dot chain line becomes a degree 200 [N]. Therefore, according to this embodiment, even when significantly thinner than the current thickness of the casing 110 as 0.4 mm, it is possible to suppress that the tensile rigidity is lowered. Thus, it can be reduced to a thickness of, for example, 0.4mm approximately casing 110, it is possible to reduce the weight of the outer panel 100.
[0065]
　Further, as shown by the broken line characteristic in FIG. 14, characteristic when the thickness of the casing 110 there is no reinforcing member in 0.4mm is the amount of displacement relative to the applied load is significantly increased in comparison with the other properties there. This indicates that the casing 110 by pressing the outer panel will be largely deformed. Therefore, if the thickness is no reinforcing member in 0.4mm, it is difficult to use as an exterior panel of an automobile.
[0066]
　As described above, according to the reinforcing member 120 of the present embodiment, it is possible to reliably improve the tensile rigidity of the outer package 110. Furthermore, according to the reinforcing member 120 of the present embodiment, it is possible to improve also the impact resistance at the time of collision. The following describes the improvement of crashworthiness performance by the reinforcing member 120 of the present embodiment.
[0067]
　As described above, the reinforcing member 120, the direction of the second moment perpendicular to the longitudinal direction, 15000 4 are less, more preferably, 12000 mm 4 is less. So as to satisfy this condition, the material of the plate 130 of the reinforcing member 120, the plate thickness and cross-sectional shape is appropriately set. In this condition is satisfied, there is a case where not only the effect on the improvement of tensile rigidity as described above, the effect regarding the improvement of crashworthiness performance obtained. That is, by satisfying the above-mentioned second moment, increasing the plastic buckling limit of the reinforcing member 120, without causing easy plastic buckling when subjected to the input of collision load, the reaction force due to the elastic deformation it can be effectively used against resistant crashworthiness. A reaction force due to elastic deformation is large reaction force increment for the relatively deformable, the reaction force increment for deformation in the plastic deformation is small. Therefore, a reaction force by elastic deformation, can be effectively used as an anti-collision performance. Incidentally, easily cause plastic buckling even small bending Larger second moment. In the conventional structure, the second moment of the door impact bar 300 is 18000Mm 4 are about, it is assumed that exert anti-collision performance due to plastic deformation. On the other hand, in this embodiment, the upper limit of the second moment is set as described above, as a result, the plastic buckling of the reinforcement member 120 is suppressed when receiving the input of the collision load, the elastic deformation it can exhibit a resistance to collision function.
[0068]
　Moreover, the yield stress of the reinforcement member 120 is equal to or greater than 500 MPa. This increases the plastic buckling limit of the reinforcement member 120, since the reaction force due to elastic deformation can be further effectively utilized, thereby improving the effective resistance crashworthiness.
[0069]
　The reinforcing member 120 also consists example thin member, the practical impact absorbing member by crossing. Further, the door impact bar 300 as in the conventional structure is only one, depending on the position where the collision load is applied is likely to misses. Also it leads to significant weight gain when a door impact bar 300 as fruitless measures to a plurality of installation. According to this embodiment, since the light-weight reinforcing member 120 than the conventional can widely deployed on the entire surface of the face panel 100, a miss can be avoided while suppressing the increase in weight. Furthermore, since the first and second reinforcing members 122, 124 are connected as a reinforcing member 120, that a collision load applied to one of the reinforcing member also propagated to the other of the reinforcing member, to absorb the impact with it can.
[0070]
　Furthermore, in the case where the exterior member 110 and the reinforcement member 120 is joined, the reinforcement member 120 when deformation is large reinforcement member 120 at the time of a collision deformation collapsing can be suppressed (rotation), can be further improved crashworthiness performance . Further, it is also effective that the tension is generated in the outer package in the region between the reinforcing member 120 adjacent to the collision deformation. When thinning the casing 110 there is no stiff, (flex) easily recessed but useless shock absorption, by constraining the casing 110 by joining the outer member 110 and the reinforcement member 120, reinforcing member 120 is deformed If, casing 110 around the portion where deformation is pulled in the plane direction. Since casing 110 is that certain tensile strength in the thickness direction of the plane direction even without rigidity to resist deformation of the tension, it is possible to improve the performance of the shock absorbing member.
[0071]
　Thus, outer panel 100 according to this embodiment, not only the tensile rigidity, crashworthiness performance can be improved. Therefore, the simplification or omission of the conventional anti-collision parts can provide additional weight reduction. In the case of using a conventional anti-collision parts, which can contribute to further improvement of collision safety performance.
[0072]
　The first reinforcing member 122 that is disposed vertically along the direction of curvature of the outer package 110, improved crashworthiness function of the convex curved portion that is curved to protrude toward the outside of the motor vehicle it can be.
[0073]
　The reinforcing member 120 is configured so as to cross the casing 110 (transverse). In this embodiment, smaller second moment of the reinforcing member 120, the (larger elastic deformation zone) high yield stress. Therefore, for receiving a load or impact upon collision of the outer panel 100 across member, the reinforcing member 120 is suitably better to as long as possible. Further, since the reinforcing member 120 is configured to traverse the casing 110, to increase the degree of freedom in setting the fulcrum for the reinforcing member 120 which receives the impact load to obtain a reaction force (the contact point with respect to the conventional other components) it can. Further, by long as possible reinforcement member 120, it is possible to widen the range to receive the impact in a collision, it is possible to improve crash-resisting capability.
[0074]
　In the following, by providing the reinforcement member 120 will be described improvement in crashworthiness features of the exterior panel 100. 9, so that as described above the longitudinal direction of the first reinforcing member 122 is disposed so that the vertical direction of the casing 110, the longitudinal direction of the second reinforcing member 124 is in the horizontal direction of the casing 110 a schematic diagram showing the arranged outer panel 100 (door panel) to show in detail the structure of FIG.
[0075]
　9, the first reinforcing member 122 is supported by the supporting portion 220 disposed vertically across the face panel 100. The second reinforcing member 124 is supported by the supporting portion 230 disposed vertically across the face panel 100. More specifically, the first reinforcing member 122 has its both ends are supported by being sandwiched in the support portion 220 and the casing 110. Similarly, second reinforcing member 124 has its both ends are supported by being sandwiched support 230 and the casing 110. Further, in FIG. 9, is supported with the first reinforcing member 122 of the intersection of the second reinforcing member 124, and the vertical direction outside or front-rear direction outside the intersection of the vehicle, by the supporting portion 220 or the support 230 the distance between the supported portion of the first reinforcing member 122 or the second reinforcing member 124 is within 1/3 of the length of the first reinforcing member 122 or the second reinforcing member 124. Thus, when a load caused by the collision is applied to the reinforcing member 120, for example, take the load applied from the intersection to the second reinforcing member 124 to the first reinforcing member 122 is supported by the supporting portion 220 from the intersection since the distance to the supported portion of the first reinforcing member 122 are close, it is possible to receive the load caused by collision efficiently elastically deformed.
[0076]
　9, the first reinforcing member 122 and the recess 122a at the intersection of the second reinforcing member 124, by crossing provided 124a, a first reinforcing member 122 and the second reinforcing member 124 on the same plane It shows an arrangement described example. Further, in FIG. 9, the first reinforcing member 122 is disposed so as braiding the second reinforcing member 124, at the intersection of adjacent, the first reinforcing member 122 is vertical arrangement of the second reinforcing member 124 It is configured differently.
[0077]
　Placing such weaving first and second reinforcing members 122 and 124, the efficiency of load transmission between the first reinforcing member 122 with each other the second reinforcing member 124 is improved. Thus, it is possible by the first and second reinforcing members 122, 124 to ensure effective shock-absorbing function during a collision.
[0078]
　11 and 12 are a perspective view detailing a first reinforcing member 122 in FIG. 9 the intersection of the second reinforcing member 124. Figure 11 corresponds to the cross section C1 of FIG. 9, FIG. 12 corresponds to the intersection C2 shown in FIG. The second reinforcing member 124 in the intersecting portions C1 is positioned outwardly of the vehicle (casing 110 side) relative to the first reinforcing member 122. Thus, it can be arranged to weaving first and second reinforcing members 122, 124. Recess 122a is provided on the first reinforcing member 122, by the recess 124a to the second reinforcing member 124 is provided, the first reinforcing member 122 is a second reinforcing member 124 is disposed in the same plane. Further, the intersection C2 is first reinforcing member 122 is positioned outwardly of the vehicle with respect to the second reinforcing member 124. Also at the intersection C2, the recess 122a is provided in a first reinforcing member 122, by the recess 124a to the second reinforcing member 124 is provided, the first reinforcing member 122 is a second reinforcing member 124 flush It is placed in.
[0079]
　Although not shown, first and second reinforcing members 122, 124 need not necessarily be arranged to knitted, the first reinforcing member or the like construction reasons during assembly of the outer panel 100 122 outer panel side all may be arranged to face panel side with respect to all of the second reinforcing member 124, also all of the second reinforcing member 124 in the opposite to all of the first reinforcing member 122 of the to may be arranged.
[0080]
　The direction of the second moment perpendicular to the longitudinal direction of the reinforcing member 120 extending from the intersection as described above 15000 4 or less. By providing the intersection, it is possible to shorten the bending fulcrum of deformation imparted to the reinforcing member 120 at the input of the collision load distance of the point, it is possible to further enhance the reaction force increment for the deformation. Thus, by providing the intersection, it is possible to improve the crashworthiness effectively.
[0081]
　Also, by the intersection between two or more locations, it is possible to further shorten the distance of the fulcrum and the point of application of the bending imparted deformation to the reinforcing member 120 at the input of the collision load, to increase the reaction force increment for the deformation more can. Moreover, since it is possible to receive the impact load is propagated to other of the plurality of reinforcing members 120, it is possible to obtain a higher reaction force. Thus, the collision performance is further improved.
[0082]
　Further, at the intersection, the recess 122a in the first and second reinforcing members 122 and 124, by providing the 124a, the thickness of the direction orthogonal to the first reinforcing member 122 with respect to casing 110 of the second reinforcing member 124 of decreases. Accordingly, even in a region including and neighboring intersections are brought into close contact with the first and second reinforcing members 122, 124 and casing 110 can be joined, collision performance is improved.
[0083]
　Further, by providing the intersection, so that the first reinforcing member 122 is a second reinforcing member 124 for restraining each other at the crossing. Thus, for example, a cross section of the reinforcement member 120 is rectangular, when the short side is in close contact with the casing 110, close to the casing 110 lying on the reinforcing member 120 is long side occurs upon receipt of an impact that can be suppressed. Further, by arranging so as weaving first and second reinforcing members 122 and 124, it caused collapse the reinforcing member 120 upon receipt of an impact the long side can be prevented from being close to the casing 110. The shorter the distance between the intersection, because the restriction of rotation inhibiting at short intervals is made, first and second reinforcing members 122, 124 is less likely to collapse. Thus, it is possible to suppress the reduction in the cross-sectional secondary moment due to the inclination of the reinforcing member 120 can reduce a decrease in crashworthiness performance.
[0084]
　The impact absorbing member, as the shock absorbing member is not rigid move against a load input direction, it is necessary to be supported on something receives the impact load. Load to be input from the exterior member 110, support portions 220 and 230 for receiving the impact load is provided on the side opposite to the casing 110 of the reinforcing member 120. At that time, load input point (intersection) near the supporting portion 220 and 230 of the reinforcing member 120, it is possible to obtain a high reaction force with less deformation. The support portion 220 and 230, when the outer panel 100 is a door panel, a door inner panel, a front pillar, center pillar, abutting portion corresponds to the side sill or the like. Further, when the outer panel 100 other than the door may support the support portion 220 and 230 in contact with the other body structural material. For example if the roof panel, a roof side rail, a front roof rail, is the site in contact with the rear roof rail and the like corresponding to the supporting portions 220 and 230. Also, the contact of the support portion 220 and 230 to these body structure materials, provided another support parts contact via the supporting component may be supported.
[0085]
　In the reinforcing member 120, a supported portion supported by the support portion 220 and 230 is an end portion of the reinforcing member 120. In this way, by supporting an end portion of the reinforcing member 120, you can take advantage of the entire reinforcement member 120 to the impact absorption. Further, a supported portion that is joined to the other parts other than the outer package, can also be restrained in a direction other than the load input direction the supported portion, the prevention falling of the reinforcement member 120 while improving the crashworthiness it can also contribute. Furthermore, the supported portion may be provided in addition to an end portion of the reinforcing member 120.
[0086]
　Next, based on FIGS. 15 and 16, the exterior panel 100 of this embodiment will be described the results of evaluation of the bending strength in consideration of the time of collision. 15, in the configuration of FIG. 9, assume the collision side of the car (the side collision) is a schematic view showing a state in which given load onto the outer panel 100 by the load applying member 300.
[0087]
　16, in the configuration of FIG. 9 is a characteristic diagram showing the relationship between the stroke and the load when a load is applied by the load applying member 300. In Figure 16, in order to evaluate the crashworthiness function, applying a load greater than 14, it shows a case that caused the stroke corresponding to the time of collision. 16, the characteristics shown by the broken line shows the characteristic in the case of evaluating the conventional structure shown in FIG. 2 for comparison under the same conditions. Also, the characteristics shown by the solid line corresponds to the invention Example 1 not bonded to the first reinforcing member 122 and the second reinforcing member 124 to the casing 110, the characteristics indicated by the two-dot chain line and the first reinforcing member 122 second corresponds to the reinforcing member 124 to the invention example 2 was bonded to the casing 110 of the.
[0088]
　As shown in FIG. 16, in the configuration of the invention Example 1, in particular stroke in the case of more than 50 mm, than the conventional structure has a higher load, it was possible to obtain a high shock absorbing performance than the conventional structure. In the configuration of the invention example 2, has a higher load than the conventional structure in substantially the entire stroke, it was possible to obtain a higher shock absorbing capacity than Invention Example 1. In the conventional structure as described above, since it is assumed to cause the impact member such as a door impact bar 300 is plastically deformed, plastic deformation occurs as the stroke increases, the increase rate of the load with increasing stroke invention examples 1, it is lower than the invention example 2. On the other hand, Invention Examples 1 according to this embodiment, the invention example 2, for shock absorption in the range of elastic deformation, the rate of increase in the load due to the increase of the stroke becomes greater than the conventional structure. Therefore, according to the configuration example of FIG. 9, for example, even when the pole side collision etc. utility pole strikes the door panel is generated, it is possible to obtain a sufficient impact-absorbing performance.
[0089]
　Simulation results, according to the configuration of FIG. 9, the invention Example 1, in any of the inventive example 2 also, the plastic buckling also be a stroke to approximately 75mm did not occur. Therefore, according to this embodiment, it is possible to absorb the impact of a collision the reinforcing member 120 as an elastic member. In Invention Example 1, but temporarily load of about stroke 65mm is reduced, which, by not bonding the reinforcing member 120 to the casing 110, collapse occurs in a part of the reinforcing member 120 It was in order. However, collapse of such reinforcing member 120 by bonding the reinforcing member 120 and the casing 110 as in the invention example 2, or may be provided a cross-section in the reinforcing member 120 as described above, in different directions It can be suppressed by arranging such braiding reinforcing member 120.
[0090]
　Note that the first reinforcing member 122 second reinforcing member 124 may not be separate members, for example, a single steel plate lattice shape and cross-section processed into a thin press-formed article, the first and second reinforcing members 122 and 124 may be integrated. In this case, the portions that are branched become intersection.
[0091]
　Further, casing 110 and the reinforcing member 120 is not limited to steel, it may be configured by a non-ferrous metal such as aluminum. Furthermore, for example, the casing 110 is formed in CFRP, it may be a rib corresponding to the first and second reinforcing members 122, 124 disposed on the back side of the casing 110. In this case, the ribs corresponding to the first and second reinforcing members 122, 124 may be integrally molded. In this case, regarded as intersections of portions (cross-shaped portions) are branched. Furthermore, the ribs corresponding to the first and second reinforcing members 122, 124 may be integrally formed with casing 110, a rib corresponding to the first and second reinforcing members 122, 124 in this case is the outer package deemed to have been joined to the 110.
[0092]
　According to the present embodiment as described above, with respect to casing 110 composed of 0.4mm around a thin plate, by in close contact with the casing 110 by disposing the reinforcing member 120, the tensile rigidity significantly it is possible to increase. Thus, touching the user to the exterior panel 100 composed of a thin plate, even if the or pressing the outer panel 100 users, it is possible to suppress the deformation of the outer panel 100.
[0093]
　If necessary, a plurality of first reinforcing member 122 and a plurality of second reinforcing member 124 is adhered to the casing 110 arranged in a grid, when the collision load to be absorbed by the elastic deformation mainly It can also improve crash-resisting capability. Thus, with achieving weight reduction, improved tensile rigidity, it is possible and to provide a car exterior panels excellent in resistance crashworthiness.
[0094]
　Having described in detail preferred embodiments of the present invention with reference to the accompanying drawings, the present invention is not limited to such an example. It would be appreciated by those skilled in the relevant field of technology of the present invention, within the scope of the technical idea described in the claims, it is intended to cover various changes and modifications , also such modifications are intended to fall within the technical scope of the present invention.
DESCRIPTION OF SYMBOLS
[0095]
　100 outer panel
　110 exterior material
　120 reinforcing member
　122 first reinforcing member
　124 second reinforcing member

WE CLAIM

And the outer member,
　and contact along automobile inner surface of the outer member, the orthogonal direction of the second moment of the outer member in a cross section perpendicular to the longitudinal direction 15000 4 comprises a reinforcing member is not more than, the automobile exterior panel.
[Requested item 2]
　The yield stress of the reinforcing member is not less than 500 MPa, automotive exterior panel according to claim 1.
[Requested item 3]
　The reinforcing member intersecting portion is provided in the direction perpendicular to the second moment of the outer member in a cross section perpendicular to the longitudinal direction of said reinforcing member extending from the intersection portion 15000 4 or less, according to claim 1 or automotive exterior panel according to claim 2.
[Requested item 4]
　The intersecting portion is provided two or more places, automotive exterior panel according to claim 3.
[Requested item 5]
　The reinforcing member is in close contact with the outer member in more than one third of the area of ​​the full-length, automotive exterior panel according to any one of claims 1 to 4.
[Requested item 6]
　The outer member has a concave curve portion which is concavely curved when viewed from the outside of the vehicle, the reinforcing member overlapping the concave curve portion is in close contact with the outer material, to any one of claims 1 to 5 automotive exterior panel as claimed.
[Requested item 7]
　The reinforcing member across the exterior materials, automobile exterior panel according to any one of claims 1 to 6.
[Requested item 8]
　The reinforcing member is joined to the outer member, automotive exterior panel according to any one of claims 1 to 7.
[Requested item 9]
　The reinforcing member of any three line segments obtained the longest line segment a line connecting the two points 3 equal portions on the contour of the outer member, the diameter a line segment located in the central through the inner side than a circle, automotive exterior panel according to any one of claims 1-8.
[Requested item 10]
　During the first side and second side opposite of the outer member, a plurality of the reinforcing member is disposed, at least one of said reinforcing member than the middle line of the second side and the first side disposed on the first side, at least one of said reinforcing member is disposed on the second side than the median line, the reinforcing members each extending direction of the first side and the second a direction along the closer one of the sides, than a second distance between the first distance between adjacent two of said reinforcing member to said reinforcement member closest to said first side or said second side It is short, automotive exterior panel according to any one of claims 1-8.
[Requested item 11]
　The angle of the reinforcing member first side and closer to the reinforcing member or the second side is within 30 °, automotive exterior panel according to claim 10.
[Requested item 12]
　The first distance is the adjacent two of said reinforcing member, and a line segment connecting the midpoint of the first side middle point between said second side of, is a distance between two points crossing , automotive exterior panel according to claim 10.
[Requested item 13]
　The second distance is the line connecting the midpoint of the middle point of the first side, said first side and nearest the reinforcing member said the midpoint of the first side a second side min and is the distance between the point of intersection, automotive exterior panel according to claim 12.
[Requested item 14]
　The second distance is the line connecting the middle point of the the midpoint of the second side, said second side and nearest the reinforcing member said the midpoint of the first side a second side min and is the distance between the point of intersection, automotive exterior panel according to claim 12.