JP2017218099A - License plate reinforcement structure - Google Patents

Abstract

An object of the present invention is to provide a license plate reinforcing structure capable of efficiently improving the mounting strength of a license plate with a simple configuration that suppresses an increase in weight. A reinforcing structure (100) includes an outer panel (106), an inner panel (108) provided on the vehicle inner side of the outer panel (106), a license plate (104) provided on the lower portion of the outer panel (106) on the vehicle outer side, and a position overlapping the license plate (104). The inner panel 108 is provided with reinforcements 110a and 110b. The reinforcements 110a and 110b have first bulging portions 116 and 124 that bulge from the inner panel 108 and are joined to the outer panel 106. The inner panel 108 bulges toward the vehicle interior, 124, there are second bulging portions 118, 122 that form closed cross sections E1, E2 that are visible from the vertical direction of the vehicle. [Selection drawing] Fig. 3

Description

  The present invention relates to a license plate reinforcing structure including a back door outer panel of a vehicle, a back door inner panel provided on the inner side of the back door outer panel, and a license plate provided on a lower portion of the back door outer panel outside the vehicle. Is.

  The back door of a vehicle is a part where various parts (fitting parts) are equipped, and it is desired to improve the mounting strength of these fitting parts. For example, Patent Document 1 discloses a technique for attaching a wiper device to a back door (tailgate). In Patent Document 1, a wiper motor insertion hole for mounting a wiper motor is provided in an inner panel constituting a back door, and the periphery of the wiper motor insertion hole is reinforced by a wiper motor mounting bracket.

  In addition to the wiper device, as a back door outfitting component, for example, a license plate can be cited. In general, in Japan, a light-type license plate that illuminates characters using a lighting fixture has become widespread. Since the light type license plate is likely to increase in weight compared to other license plates, higher mounting strength is required.

JP 2003-39954 A

  However, unlike a wiper device or the like, many license plates are attached to the lower end side of the back door. This position tends to increase the kinetic energy generated when closing the back door. In addition, if the weight of the license plate is further increased due to light-type lighting fixtures, etc., it may cause various problems such as back door swinging, cracking, and abnormal noise caused by vibration. It can be.

  In view of such problems, an object of the present invention is to provide a license plate reinforcing structure that can efficiently improve the mounting strength of a license plate with a simple configuration that suppresses an increase in weight.

  In order to solve the above-described problems, a typical configuration of the license plate reinforcing structure according to the present invention includes a vehicle back door outer panel, a back door inner panel provided inside the back door outer panel, and a back door outer panel. In the license plate reinforcing structure including a license plate provided at the lower part on the outside of the vehicle, the license plate reinforcing structure further includes one or more reinforcements provided on the back door inner panel at a position overlapping the license plate. Each of the reinforcements has at least one first bulging portion that bulges from the back door inner panel and is joined to the back door outer panel, and the back door inner panel bulges to the inside of the vehicle. One or more forming a closed cross section that is visible from the vertical direction of the vehicle between the bulging portion And having a second bulging portion of the.

  According to the above configuration, the load generated from the license plate when the back door is closed is transmitted not only to the back door outer panel but also to the back door inner panel through the reinforcement. Therefore, local stress concentration on the back door outer panel can be prevented, and cracking of the back door outer panel, swinging of the back door itself, and generation of abnormal noise due to vibration during traveling can be prevented. be able to. Moreover, since the rigidity is improved by joining the components, the plate thickness required for each component is reduced, leading to further weight reduction of the vehicle.

  The first bulging portion and the second bulging portion may be long in the vertical direction of the vehicle, and may be arranged at intervals in the vehicle width direction. With this configuration, since the cross-sectional secondary moment is further improved, the rigidity can be improved efficiently.

  The first bulging portion and the second bulging portion may bulge in a trapezoidal shape when viewed from the vehicle vertical direction, and may have a closed cross section formed in a hexagonal shape. By adopting a so-called honeycomb structure in which a hexagonal column closed section is formed, the rigidity can be improved more efficiently.

  The back door inner panel further continues from the upper end of the second bulging portion and continuously from the upper bulging portion that bulges to the vehicle inner side over the longitudinal range in the vehicle width direction and from the lower end of the second bulging portion. And a lower bulging portion that bulges toward the vehicle inner side over a longitudinal range in the vehicle width direction.

  With the above configuration, the cross-sectional secondary moment of the back door inner panel is further improved, and the load can be absorbed efficiently. In addition, since the back door inner panel is a non-design surface that is not visible after assembly, a countermeasure for obtaining rigidity can be easily provided as compared with the back door outer panel that is a design surface.

  In order to solve the above-described problems, another typical configuration of the license plate reinforcing structure according to the present invention includes a back door outer panel of a vehicle, a back door inner panel provided inside the back door outer panel, and a back door. A license plate reinforcing structure including a license plate provided at a lower portion of the outer panel of the vehicle, wherein the license plate reinforcing structure further includes one or more reinforcements provided on the back door outer panel at a position overlapping the license plate. Each of the reinforcements has one or more third bulging portions that bulge from the back door outer panel and are joined to the back door inner panel, and the back door outer panel bulges to the outside of the vehicle. A closed cross section that is visible from the vehicle up-down direction is formed between the bulge and the bulge. And having a fourth bulging portion of the above.

  Also with the above configuration, the load generated from the license plate when the back door is closed is transmitted to the back door inner panel not only through the back door outer panel but also through the reinforcement. Therefore, local stress concentration of the back door outer panel can be prevented, and cracks of the back door outer panel, swinging of the back door itself, and generation of abnormal noise resulting from vibration can be prevented. . In addition, since the rigidity is improved by joining the parts together, the plate thickness required for each part is reduced, leading to a reduction in the weight of the vehicle.

  Said 3rd bulge part and 4th bulge part may each be long in the vehicle up-down direction, and may be arrange | positioned at intervals in the vehicle width direction. With this configuration, since the cross-sectional secondary moment is further improved, the rigidity can be improved efficiently.

  Said 3rd bulge part and 4th bulge part may each bulge in trapezoid seeing from a vehicle up-down direction, and may form the closed cross section in the hexagon. By adopting a so-called honeycomb structure in which a hexagonal column closed section is formed, the rigidity can be improved more efficiently.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the license plate reinforcement structure which can improve the attachment strength of a license plate efficiently with the simple structure which suppressed the increase in the weight.

It is a figure which shows the license plate reinforcement structure concerning 1st Embodiment of this invention. It is arrow A figure of the back door inner panel of FIG.1 (b). It is BB sectional drawing of the reinforcement structure of Fig.1 (a). It is the figure which showed each modification of the reinforcement structure shown in FIG.3 (b).

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a view showing a license plate reinforcing structure (hereinafter, reinforcing structure 100) according to the first embodiment of the present invention. FIG. 1A shows a back door 102 at the rear of the vehicle where the reinforcing structure 100 is implemented as viewed from the rear of the vehicle. Hereinafter, in FIG. 1 and all other drawings of the present application, the vehicle front-rear direction is indicated by arrows F (Forward) and B (Backward), the vehicle width direction is indicated by arrows L (Leftward), R (Rightward), and the vehicle vertical direction, respectively. Are illustrated by arrows U (upward) and D (downward), respectively.

  The reinforcing structure 100 is intended to improve the mounting strength of the license plate 104 efficiently. The license plate 104 is also referred to as a license plate, and is attached to the lower portion of the back side of the back door outer panel (hereinafter referred to as the outer panel 106) that constitutes the outer surface of the back door 102.

  FIG.1 (b) is the perspective view which looked at the back door 102 of Fig.1 (a) from the vehicle front. A back door inner panel (hereinafter referred to as an inner panel 108) is provided on the vehicle front side of the outer panel 106 (see FIG. 1A), that is, on the vehicle inner side.

  FIG. 2 is an arrow A view of the back door inner panel 108 of FIG. View A is looking at the lower part of the inner panel 108 from the rear of the vehicle. Two reinforcements 110a and 110b are attached to the vehicle rear side of the inner panel 108, that is, the vehicle outer side. The reinforcements 110a and 110b are joined to the inner panel 108 and the outer panel 106 (see FIG. 3A) to reinforce them.

  FIG. 3 is a cross-sectional view taken along the line BB of the reinforcing structure 100 in FIG. As shown in FIG. 3A, the reinforcements 110a and 110b are provided at positions where the license plates 104 overlap. The two reinforcements 110a and 110b have the same configuration symmetrical in the vehicle width direction. Hereinafter, the reinforcement 110a on the left side of the vehicle will be described as a representative of each reinforcement.

  FIG. 3B is an enlarged view of the reinforcements 110a and 110b in FIG. The reinforcement 110a has a hat shape that is convex toward the outer panel 106 when viewed from the vehicle vertical direction. Specifically, the reinforcement 110a is joined to the inner panel 108 by flange portions 112 and 114 at both ends in the vehicle width direction. The first bulging portion 116 bulges between the flange portions 112 and 114, and is joined to the outer panel 106 by the first bulging portion 116. The attachment portion 105 of the license plate 104 is also connected to the first bulge portion 116.

  In the present embodiment, the inner panel 108 is also provided with a structure for improving rigidity. A second bulging portion 118 that bulges toward the inside of the vehicle is provided at a portion of the inner panel 108 where the reinforcement 110a is installed.

  The second bulging portion 118 forms a closed cross section E1 visually recognized from the vehicle vertical direction with the first bulging portion 116 of the reinforcement 110a, so that the load applied from the license plate 104 can be easily absorbed. The second bulging portion 118 is also provided with a through hole 120, and spot welding or the like can be performed to the reinforcement 110 a and the outer panel 106 through the through hole 120.

  The reinforcing structure 100 has a configuration in which two closed sections E1 and E2 are arranged side by side in the vehicle width direction on the vehicle inner side where the license plate 104 overlaps. These closed sections E1 and E2 are formed continuously in the vehicle vertical direction. Specifically, as shown in FIG. 1 (b), the second bulging portions 118 and 122 are arranged at two intervals in the vehicle width direction, and are respectively provided in the longitudinal direction in the vehicle vertical direction. Yes. As shown in FIG. 2, the first bulging portions 116 and 124 of the reinforcements 110a and 110b are also arranged at two intervals in the vehicle width direction, and are respectively provided longitudinally in the vehicle vertical direction. It has been. Due to the closed cross-sections E1 and E2 visually recognized from the vehicle up-and-down direction, the position where the license plate 104 overlaps has improved cross-sectional secondary moment and increased rigidity.

  As shown in FIG. 3B, each of the first bulge portion 116 and the second bulge portion 118 bulges in a trapezoidal shape when viewed from the vehicle vertical direction. Therefore, the closed cross section E1 is formed in a hexagonal shape, and the closed cross section E2 is also a so-called honeycomb structure. Since the first bulge portions 116 and 124 and the second bulge portions 118 and 122 form the closed cross sections E1 and E2 of the honeycomb structure, the second moment of the cross section is efficiently increased and the increase in weight is suppressed. The rigidity can be improved efficiently.

  According to the present embodiment, when the back door 102 is closed, the load applied from the license plate 104 is transmitted not only to the outer panel 106 but also to the inner panel 108 through the reinforcement 110a. Accordingly, local stress concentration on the outer panel 106 can be prevented, and cracks in the outer panel 106, rocking of the back door 102 itself, and generation of abnormal noise resulting from vibration during traveling can be prevented. be able to. Further, since the rigidity is improved by a simple configuration in which the parts are joined together by the reinforcements 110a and 110b, the plate thickness required for each part is reduced, which leads to further weight reduction of the vehicle.

  Reference is again made to FIG. The inner panel 108 is provided with an upper bulging portion 126 and a lower bulging portion 128 for further improvement in rigidity. The upper bulging portion 126 is a portion that bulges inward of the vehicle in the same manner as the second bulging portion 118, and is provided continuously from the upper end of the second bulging portion 118 over a longitudinal range in the vehicle width direction. Yes. The lower bulging portion 128 is also a portion that bulges toward the inside of the vehicle, and is provided continuously from the lower end of the second bulging portion 118 over a longitudinal range in the vehicle width direction.

  With the above configuration, the cross-sectional secondary moment of the inner panel 108 is further improved, and the load can be absorbed efficiently. Further, since the inner panel 108 is a non-design surface that cannot be visually recognized after assembly, a measure for obtaining rigidity can be easily provided as compared with the outer panel 106 that is a design surface.

(Modification)
FIG. 4 is a view showing each modification of the reinforcing structure 100 shown in FIG. Henceforth, about the same component as already demonstrated, the description is abbreviate | omitted by attaching | subjecting the same code | symbol. In addition, components having the same names as the components already described have the same functions unless otherwise specified even if they are given different reference numerals.

  FIG. 4A is a view showing a reinforcing structure 140 of the first modification. Unlike the reinforcement structure 100 including the two reinforcements 110a and 110b in FIG. 3B, the reinforcement structure 140 includes an integral large-shape reinforcement 142.

  The reinforcement 142 includes a first bulging portion 144 between the first bulging portions 116 and 124, and is joined to the outer panel 106 by these three first bulging portions 116, 124, and 144. On the other hand, the inner panel 146 has a second bulging portion 148 that bulges toward the inside of the vehicle at a location corresponding to the first bulging portion 144. As a result, in the reinforcing structure 140, a total of three hexagonal closed cross sections E1 to E3 that are visually recognized from the vehicle vertical direction are provided in the vehicle width direction.

  In the reinforcing structure 140, since the number of closed cross sections E1 to E3 to be formed is larger than that in the reinforcing structure 140 in FIG. 3B, higher rigidity can be exhibited. Therefore, the generation of cracks in the outer panel 106, the swinging of the back door 102 itself, and the generation of abnormal noise resulting from vibration during traveling can be further prevented.

  FIG. 4B is a view showing a reinforcing structure 160 of the second modified example. In the reinforcing structure 160, third bulging portions 164, 166, 168 are provided in the reinforcement 162, and fourth bulging portions 172, 174 are provided in the outer panel 170.

  The third bulging portion 164 of the reinforcement 162 bulges from the outer panel 170 side and is joined to the inner panel 176. The fourth bulges 172 and 174 of the outer panel 170 bulge to the outside of the vehicle, and the attachment parts 105 and 107 of the license plate 104 are connected. Since the fourth bulging portions 172 and 174 become invisible when covered with the license plate 104, the aesthetic appearance of the vehicle is not impaired.

  The third bulging portions 164, 166, 168 and the fourth bulging portions 172, 174 are also arranged at intervals in the vehicle width direction, and are each long in the vehicle vertical direction and trapezoidal when viewed from the vehicle vertical direction. It bulges out. And the 3rd bulging parts 164 and 168 and the 4th bulging parts 172 and 174 form hexagonal closed sections E4 and E5 visually recognized from the vehicle up-and-down direction.

  The inner panel 176 is provided with fifth bulging portions 178 and 180 bulging to the inside of the vehicle. The fifth bulges 178 and 180 are also arranged at intervals in the vehicle width direction, are each longitudinal in the vehicle vertical direction, and bulge in a trapezoidal shape when viewed from the vehicle vertical direction. These fifth bulging portions 178 and 180 also form hexagonal closed cross sections E6 and E7 that are visually recognized from the vehicle up-down direction with the reinforcement 162. As described above, the reinforcing structure 160 has a honeycomb structure in which a plurality of hexagonal closed cross sections E4 to E7 are formed between the outer panel 170, the reinforcement 162, and the inner panel 176 in order from the outside of the vehicle. .

  The reinforcing structure 160 has a plurality of closed cross sections E4 to E7 formed adjacent to each other, so that the secondary moment of the cross section is large and the rigidity is further increased. Therefore, the load input from the license plate 104 can be absorbed more efficiently.

  The reinforcement 142 in FIG. 4 (a) and the reinforcement 162 in FIG. 4 (b) have an integral structure. However, like the reinforcements 110a and 110b in FIG. It is also possible to have a configuration divided for each.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  The present invention includes a back door outer panel provided at the rear portion of the vehicle, a back door inner panel provided at the vehicle interior side of the back door outer panel, and a license plate provided at a lower portion of the back door outer panel outside the vehicle. It can be used for a license plate reinforcement structure.

E1, E2: Closed cross section of reinforcement and inner panel, E4, E5 ... Closed cross section of reinforcement and outer panel, E6, E7 ... Closed cross section of reinforcement and inner panel, 100 ... Reinforced structure, 102 ... Back door 104 ... License plate 105, 107 ... License plate mounting portion 106 ... Outer panel 108 ... Inner panel 110a ... Left side reinforcement 110b ... Right side reinforcement 112, 114 ... Flange portion 116 ... First A bulging part, 118 ... a second bulging part, 120 ... a through hole, 122 ... a second bulging part, 124 ... a first bulging part, 126 ... an upper bulging part, 128 ... a lower bulging part, 140 ... Reinforcing structure of the first modified example, 142... Reinforce, 144... First bulging portion, 146... Inner panel, 148. Concrete, 162 ... reinforcement, 164, 166, 168 ... third bulging portion, 170 ... outer panel, 172, 174 ... fourth bulging portion, 176 ... inner panel, 178, 180 ... fifth bulging portion

Claims (7)

In a license plate reinforcing structure comprising a vehicle back door outer panel, a back door inner panel provided on the vehicle inner side of the back door outer panel, and a license plate provided on a lower portion outside the vehicle of the back door outer panel,
The license plate reinforcement structure further includes
One or more reinforcements provided on the back door inner panel at a position overlapping the license plate,
Each of the reinforcements has one or more first bulges that bulge from the back door inner panel and are joined to the back door outer panel,
The back door inner panel has at least one second bulging portion that bulges toward the inside of the vehicle and forms a closed cross section that is visible from the vehicle vertical direction between the first bulging portion and the first bulging portion. License plate reinforcement structure.   2. The license plate reinforcement according to claim 1, wherein the first bulge portion and the second bulge portion are each longitudinal in the vehicle vertical direction and spaced apart in the vehicle width direction. Construction.   The said 1st bulging part and the said 2nd bulging part are each bulging in trapezoid seeing from the vehicle up-down direction, The said closed cross section is formed in the hexagon, The Claim 1 or 2 characterized by the above-mentioned. The license plate reinforcement structure described. The back door inner panel further includes:
An upper bulging portion that bulges inward from the upper end of the second bulging portion over the longitudinal range in the vehicle width direction; and
4. The vehicle according to claim 1, further comprising: a lower bulging portion that continuously bulges from the lower end of the second bulging portion to the vehicle inner side over a longitudinal range in the vehicle width direction. The license plate reinforcement structure described. In a license plate reinforcing structure comprising a back door outer panel of a vehicle, a back door inner panel provided on the inner side of the back door outer panel, and a license plate provided on a lower portion on the outer side of the back door outer panel,
The license plate reinforcement structure further includes
One or more reinforcements provided on the back door outer panel at a position overlapping the license plate,
Each of the reinforcements has one or more third bulges that bulge from the back door outer panel and are joined to the back door inner panel,
The back door outer panel has at least one fourth bulging portion that bulges to the outside of the vehicle and forms a closed cross section that is visible from the vehicle vertical direction between the third bulging portion and the third bulging portion. License plate reinforcement structure.   6. The license plate reinforcement according to claim 5, wherein the third bulge portion and the fourth bulge portion are each longitudinal in the vehicle vertical direction and spaced apart in the vehicle width direction. Construction.   The said 3rd bulging part and the said 4th bulging part are each bulging in trapezoid seeing from the vehicle up-down direction, and the said closed cross section is formed in the hexagon. The license plate reinforcement structure described.

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