Plate assembly

Abstract

A plate assembly (100) is provided with an outer plate member (1), an inner plate member (2), and a reinforcing member (3). The outer plate member (1) includes an outer plate main body (10) that is curved so as to protrude outward in a cross-sectional view perpendicular to the first direction. The inner plate member (2) includes an inner plate body (20) and is integrated with the outer plate member (1). The reinforcing member (3) is disposed in a space (V) between the outer panel main body (10) and the inner panel main body (20). In the reinforcing member (3), a first outer corner portion (35) and a second outer corner portion (36) are joined to the outer panel body (10), and a first inner lateral portion (33) and a second inner lateral portion (34) are joined to the inner panel body (20).

Description

Technical Field

[0001] The present disclosure relates to a panel assembly including an outer panel component and an inner panel component. Background Art

[0002] Automobiles are equipped with outer panel components (e.g., tailgate panels, hoods (engine hoods), fenders, and side panels). The outer panel components include a plate body (hereinafter also referred to as an "outer panel body") that is curved convexly outward. From the perspective of fuel efficiency, the outer panel components are required to be lightweight. In outer panel components, lightweighting can be achieved by making the plate thickness thinner.

[0003] During the driving process of the car, the outer panel parts are subjected to various vibrations, so noise and vibration characteristics are required. For example, vibrations are generated in the engine and transmission (drive system). In addition, the tires come into contact with the road surface and generate vibrations. These vibrations propagate to various parts of the vehicle body and are also transmitted to the outer panel parts. The air in the car cabin vibrates due to the vibrations of various parts, and this vibration sometimes becomes an uncomfortable sound and is transmitted to the ears of the passengers. Therefore, it is required to suppress the uncomfortable sound transmitted to the passengers. In addition, the sound generated by vibration is called roaring noise or drumming noise.

[0004] If the vibration frequency (frequency) of these vibrations is the same as the natural vibration frequency (natural value) of the corresponding component, resonance will occur in the component, and the sound (roaring sound, vibration noise) generated by the vibration will increase. In particular, in components with a large surface area such as outer panel components, if resonance occurs, a loud sound will be generated. Unlike components with a hat-shaped cross-section (such as lower side beams and B-pillars), in components such as outer panel components that do not have ridges and have low rigidity, if resonance occurs, a loud sound will also be generated. Hereinafter, the noise and vibration characteristics will also be referred to as NV characteristics (Noise, Vibration characteristics).

[0005] In addition, there is a case where the outer panel component is combined with the inner panel component and integrated with the inner panel component. By combining the inner panel component with the outer panel component, a panel assembly is formed. In the case of a panel assembly, the inner panel component is also required to be lightweight, just like the outer panel component. The inner panel component also includes a panel body (hereinafter also referred to as the "inner panel body"). Since the surface area of ​​the inner panel component is also large, when the vibration from the outside is transmitted to the inner panel component, if the transmitted vibration has the same vibration frequency as the natural vibration frequency of the inner panel component, resonance occurs, and the uncomfortable noise transmitted to the occupants increases.

[0006] From the perspective of weight reduction, it is required to set the thickness of the outer plate component, the thickness of the inner plate component, or the thickness of both the outer plate component and the inner plate component to be thinner. When the thickness of these components is thinner, the natural vibration frequency of the plate assembly is reduced. When the reduced natural vibration frequency is the same as the frequency of vibration from the engine, transmission, tires, etc., resonance occurs. As a result, sounds such as roaring and vibration noise are generated, and the uncomfortable noise transmitted to the occupants may increase.

[0007] When a certain external force is applied to a component, the component deforms. Components that are easily deformed have lower rigidity. The lower the rigidity of a component, the lower the natural vibration frequency of the component. Therefore, in order to increase the natural vibration frequency, it is considered effective to increase the rigidity of the component. Therefore, additional components such as reinforcements and reinforcing members (reinforcing ribs) are sometimes provided on the target component. In addition, there is also a method of suppressing vibration by attaching a vibration-damping member that can convert vibration energy into heat energy to the target component. However, if reinforcements, reinforcing members and vibration-damping members are blindly added, the total weight increases. Therefore, the addition of reinforcements, etc. needs to limit the effective positions where the natural vibration frequency increases in the component to a minimum.

[0008] On the other hand, it is relatively easy to reduce the natural frequency because the natural frequency can be reduced by, for example, drilling a hole in a thin member.

[0009] However, it is technically difficult to increase the natural frequency while suppressing an increase in weight and cost, and various technologies have been developed in the past.

[0010] For example, Japanese Patent Application Laid-Open No. 2010-228617 (Patent Document 1), Japanese Patent Application Laid-Open No. 2005-271707 (Patent Document 2), Japanese Patent Application Laid-Open No. 2006-036134 (Patent Document 3), and Japanese Patent Application Laid-Open No. 2010-058622 (Patent Document 4) disclose technologies focusing on noise and vibration.

[0011] Patent document 1 discloses a rear panel upper structure capable of reducing noise in a vehicle cabin caused by vibration of a rear panel upper. In the patent document 1, the rear panel upper has a natural vibration frequency different from the vibration frequency of the volume change of the vehicle cabin caused by running of the vehicle.

[0012] The technology described in Patent Document 2 relates to a dash panel structure that is lightweight and reduces manufacturing costs and has excellent sound insulation. The technology described in Patent Document 3 relates to a roof panel structure of a vehicle body that can be lightweight and can effectively reduce vibration energy to reduce sound radiation. In the technologies of Patent Documents 2 and 3, the areas to be reinforced with high-rigidity members are limited in the panels that are the targets of each.

[0013] The technology described in Patent Document 4 relates to an upper structure of a vehicle body that can achieve a reduction in booming noise in a vehicle cabin with a simple structure without increasing cost or weight. In the technology of Patent Document 4, the upper part of the vehicle body includes a cowl top, a front beam, and a rear beam, and the natural vibration frequencies of each are set to values ​​that become higher in the order of the cowl top, the front beam, and the rear beam.

[0014] Prior art literature

[0015] Patent Literature

[0016] Patent Document 1: Japanese Patent Application Publication No. 2010-228617

[0017] Patent Document 2: Japanese Patent Application Publication No. 2005-271707

[0018] Patent Document 3: Japanese Patent Application Publication No. 2006-036134

[0019] Patent Document 4: Japanese Patent Application Publication No. 2010-058622 Summary of the invention

[0020] Problem that the invention aims to solve

[0021] According to the techniques of Patent Documents 1 to 4, it may be possible to achieve weight reduction and improve NV characteristics simply for the panel components. However, Patent Documents 1 to 4 do not study the problem of suppressing the increase of uncomfortable noise transmitted to the occupants even if the thickness of the panel assembly including the outer panel component and the inner panel component is made thinner.

[0022] An object of the present disclosure is to provide a panel assembly including an outer panel member and an inner panel member, which can suppress an increase in uncomfortable noise transmitted to an occupant even when the panel assembly is reduced in weight.

[0023] Solutions for solving problems

[0024] The panel assembly disclosed in the present invention comprises an outer panel component, an inner panel component and a reinforcing member. The outer panel component extends in a first direction and a second direction perpendicular to the first direction. The outer panel component includes an outer panel body that is convexly bent outward in a cross-sectional view perpendicular to the first direction. The inner panel component is arranged on the inner side of the outer panel component and is integrated with the outer panel component. The inner panel component includes an inner panel body opposite to the outer panel body, and a space is formed between the outer panel body and the inner panel body. The reinforcing member is arranged in the above-mentioned space between the outer panel body and the inner panel body.

[0025] The reinforcing member, when viewed along the first direction, comprises an outer side transverse portion, a first longitudinal portion, a second longitudinal portion, a first inner side transverse portion, a second inner side transverse portion, a first outer side corner portion, a second outer side corner portion, a first inner side corner portion, and a second inner side corner portion. The outer side transverse portion is disposed on the outer plate body side. The first outer side corner portion connects the outer side transverse portion and the first longitudinal portion. The second outer side corner portion connects the outer side transverse portion and the second longitudinal portion. The first inner side corner portion connects the first longitudinal portion and the first inner side transverse portion. The second inner side corner portion connects the second longitudinal portion and the second inner side transverse portion. The reinforcing member has a width along the first direction.

[0026] The first outer side corner portion is joined to the outer panel body at a first region separated from the top portion of the outer panel body. The second outer side corner portion is joined to the outer panel body at a second region of the outer panel body, the second region being located on the side opposite to the first region relative to the top portion. The first inner side transverse portion and the second inner side transverse portion are joined to the inner panel body.

[0027] Effects of the Invention

[0028] According to the panel assembly of the present disclosure, even if the panel assembly is reduced in weight, it is possible to suppress an increase in uncomfortable noise transmitted to the occupant. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a perspective view of the assembled state of the panel assembly according to the first embodiment.

[0030] Figure 2 It is a perspective view of the panel assembly in the first embodiment in an exploded state.

[0031] Figure 3 yes Figure 1 A cross-sectional view of the plate assembly is shown.

[0032] Figure 4 It is a top view of a tailgate as a specific example of the panel assembly.

[0033] Figure 5 yes Figure 4 A perspective view of the outer panel components in the tailgate is shown.

[0034] Figure 6 yes Figure 4 A perspective view of the inner panel component in the tailgate is shown.

[0035] Figure 7 yes Figure 4 Cross-sectional view along line VII-VII.

[0036] Figure 8 This is a perspective view of a state where a reinforcement member is mounted on the inner panel body.

[0037] Fig. 9It is a cross-sectional view showing a modified example of the plate assembly.

[0038] Fig.10 It is a cross-sectional view showing another modified example of the plate assembly.

[0039] Fig.11 It is a perspective view of the reinforcing member in the panel assembly of the first embodiment.

[0040] Fig.12 This is a cross-sectional view showing a condition 1 which is suitable in the panel assembly of the first embodiment.

[0041] Fig.13 It is a plan view showing the condition 2 which is suitable in the panel assembly of the first embodiment.

[0042] Fig.14 It is a plan view showing the condition 3 which is suitable in the panel assembly of the first embodiment.

[0043] Fig.15 It is a perspective view of a reinforcing member in the panel assembly according to the second embodiment.

[0044] Fig.16 It is a cross-sectional view of a panel assembly including a reinforcing member according to a second embodiment.

[0045] Fig.17 It is a perspective view of a reinforcing member in the panel assembly according to the third embodiment.

[0046] Fig.18 It is a cross-sectional view of a panel assembly including a reinforcing member according to a third embodiment.

[0047] Fig.19 It is a perspective view of Modification 1 of the reinforcing member in the panel assembly of the third embodiment.

[0048] Fig. 20 It is a perspective view of Modification 2 of the reinforcing member in the panel assembly of the third embodiment.

[0049] Fig.21 It is a perspective view of Modification 3 of the reinforcing member in the panel assembly of the third embodiment.

[0050] Fig. 22 It is a perspective view of a reinforcing member in a panel assembly according to a fourth embodiment.

[0051] Fig.23 It is a cross-sectional view of a panel assembly including a reinforcing member according to a fourth embodiment.

[0052] Fig.24 It is a perspective view of Modification 4 of the reinforcing member in the panel assembly of the fourth embodiment.

[0053] Fig.25It is a perspective view of a fifth modification of the reinforcing member in the panel assembly of the fourth embodiment.

[0054] Fig.26 It is a perspective view of a reinforcing member in the panel assembly according to the fifth embodiment.

[0055] Fig. 27 It is a perspective view of a modification 6 of the reinforcing member in the panel assembly of the fifth embodiment.

[0056] Fig.28 It is a perspective view of a reinforcing member in a panel assembly according to a sixth embodiment.

[0057] Fig.29 It is a perspective view of Modification 7 of the reinforcing member in the panel assembly of the sixth embodiment.

[0058] Fig.30 It is a perspective view of Modification 8 of the reinforcing member in the panel assembly of the sixth embodiment.

[0059] Fig.31 It is a perspective view of Modification 9 of the reinforcing member in the panel assembly of the sixth embodiment.

[0060] Fig.32 It is a top view of the panel assembly of the seventh embodiment.

[0061] Fig.33 This is a diagram showing the results of Example 6.

[0062] Fig.34 This is a diagram showing the results of Example 6.

[0063] Fig.35 This is a diagram showing the results of Example 7.

[0064] Fig.36 This is a diagram showing the results of Example 7. DETAILED DESCRIPTION

[0065] The following is a description of the embodiments of the present disclosure. In addition, in the following description, the embodiments of the present disclosure are described by way of example, but the present disclosure is not limited to the examples described below. In the following description, there are cases where specific numerical values ​​and specific materials are illustrated, but the present disclosure is not limited to these examples.

[0066] The panel assembly of the embodiment of the present disclosure comprises an outer panel component, an inner panel component and a reinforcing member. The outer panel component extends in a first direction and a second direction perpendicular to the first direction. The outer panel component includes an outer panel body that is convexly bent outward in a cross-sectional perspective perpendicular to the first direction. The inner panel component is arranged on the inner side of the outer panel component and is integrated with the outer panel component. The inner panel component includes an inner panel body opposite to the outer panel body, and a space is formed between the outer panel body and the inner panel body. The reinforcing member is arranged in the above-mentioned space between the outer panel body and the inner panel body.

[0067] The reinforcing member, when viewed along the first direction, comprises an outer side transverse portion, a first longitudinal portion, a second longitudinal portion, a first inner side transverse portion, a second inner side transverse portion, a first outer side corner portion, a second outer side corner portion, a first inner side corner portion, and a second inner side corner portion. The outer side transverse portion is disposed on the outer plate body side. The first outer side corner portion connects the outer side transverse portion and the first longitudinal portion. The second outer side corner portion connects the outer side transverse portion and the second longitudinal portion. The first inner side corner portion connects the first longitudinal portion and the first inner side transverse portion. The second inner side corner portion connects the second longitudinal portion and the second inner side transverse portion. The reinforcing member has a width along the first direction.

[0068] The first outer corner is joined to the outer panel body at a first region separated from the top portion of the outer panel body. The second outer corner is joined to the outer panel body at a second region of the outer panel body, the second region being located on the side opposite to the first region relative to the top portion. The first inner side transverse portion and the second inner side transverse portion are joined to the inner panel body (first structure).

[0069] In a typical example, the reinforcing member has a hat-shaped cross section when viewed in a cross-sectional perspective perpendicular to the first direction. In another typical example, the reinforcing member has a C-shaped cross section when viewed in a cross-sectional perspective perpendicular to the first direction. In another typical example, the reinforcing member is a solid member.

[0070] In the panel assembly of the first structure, the reinforcing member is joined to the outer panel body and also to the inner panel body. Here, the first outer side corner and the second outer side corner of the reinforcing member are joined to the first area and the second area of ​​the outer panel body, respectively. Therefore, the outer side transverse portion is set from the first area of ​​the outer panel body to the second area, and is separated from the top of the outer panel body. In this case, when an external force is applied to the outer panel body, a tensile force or a compressive force along the second direction is generated in the outer side transverse portion, and the first area and the second area of ​​the outer panel body receive a reaction force of the tensile force or the compressive force along the second direction from the outer side transverse portion. As a result, the first area and the second area of ​​the outer panel body can maintain a relative positional relationship separated from each other in a manner of separating the protruding top, and suppress the shape change of the outer panel body in the cross section perpendicular to the first direction. In addition, since the reinforcing member has a width in the first direction, the first outer side corner and the second outer side corner are joined to the first area and the second area of ​​the outer panel body with a predetermined width in the first direction, respectively. Therefore, when the first area and the second area of ​​the outer plate body want to change their shape in the section perpendicular to the second direction, the first outer side corner and the second outer side corner will also generate a reaction force against them. Therefore, the shape change of the outer plate body can also be suppressed in the section perpendicular to the second direction. In this way, both the shape change of the outer plate body in the section perpendicular to the first direction and the shape change in the section perpendicular to the second direction can be suppressed, thereby suppressing the deformation of the surface shape of the outer plate body. Therefore, the rigidity of the outer plate body is improved.

[0071] In this case, even if the outer panel main body attempts to deform due to the vibration transmitted to the panel assembly, the outer panel main body is less likely to deform due to the increased rigidity of the outer panel member.

[0072] Furthermore, the first inner side lateral portion and the second inner side lateral portion of the reinforcing member are respectively joined to the inner panel body.

[0073] Specifically, the first inner side transverse portion is connected to the first longitudinal portion via the first inner side corner portion, and the second inner side transverse portion is connected to the second longitudinal portion via the second inner side corner portion. The reinforcing member has a width in the first direction, so the first inner side transverse portion and the second inner side transverse portion are respectively joined to the inner plate body with a predetermined width in the first direction. This produces the following effects. For example, when an external force is applied to the inner plate body so as to cause a shape change in a section perpendicular to the second direction (the Y direction described later), the first inner side transverse portion and the second inner side transverse portion generate a reaction force corresponding to each region that is separately joined to the first inner side transverse portion and the second inner side transverse portion. Therefore, the shape change of the inner plate body can also be suppressed in the section perpendicular to the second direction. That is, the rigidity of the inner plate component is improved. In this case, even if the inner plate body wants to deform in the section perpendicular to the second direction due to the vibration transmitted to the plate assembly, the inner plate body is not easily deformed due to the increased rigidity of the inner plate component.

[0074] In summary, the outer plate component has its rigidity increased by the outer side transverse portion, the first outer side corner portion, and the second outer side corner portion. The inner plate component has its rigidity increased by the first inner side transverse portion, the second inner side transverse portion, the first inner side corner portion, and the second inner side corner portion. The outer plate component and the inner plate component, whose rigidity and natural vibration frequency are increased in this way, are connected to each other via the first longitudinal portion and the second longitudinal portion. In this case, the components with increased rigidity are connected to each other, so when an external force is applied to one component, the external force is also transmitted to the other component that is not subjected to the external force. Since there are two components that need to be deformed, the deformation amount of each component becomes smaller. That is, the rigidity of the plate assembly is further improved.

[0075] In other words, the inner plate component is not easily deformed by the action of the first inner side transverse portion, the second inner side transverse portion, the first inner side corner portion, and the second inner side corner portion. The inner plate component that is not easily deformed is connected to the outer plate component via the first longitudinal portion and the second longitudinal portion. As a result, the outer plate component is even less likely to deform. That is, the rigidity of the outer plate component is improved. In addition, the outer plate component is not easily deformed by the action of the outer side transverse portion, the first outer side corner portion, and the second outer side corner portion. The outer plate component that is not easily deformed is connected to the inner plate component via the first longitudinal portion and the second longitudinal portion. As a result, the inner plate component is even less likely to deform. That is, the rigidity of the inner plate component is further improved.

[0076] In addition, regarding the elements of the reinforcing member disposed on the inner plate component side, the first inner side corner portion is connected to the first inner side transverse portion, and the first longitudinal portion is connected to the first inner side corner portion. When an external force is applied to the inner plate body so as to cause a shape change in a section perpendicular to the second direction (Y direction), the reaction force generated by the first inner side transverse portion and the second inner side transverse portion is further increased due to the presence of the first longitudinal portion. Therefore, compared with a reinforcing member without the first longitudinal portion, the inner plate component is reinforced by the reinforcing member, and the rigidity of the inner plate component is further improved. The effect generated by the first longitudinal portion is also reflected by the second longitudinal portion.

[0077] In addition, regarding the elements of the reinforcing member disposed on the outer panel side, the first outer side corner is connected to the outer side transverse portion, and the first longitudinal portion is connected to the first outer side corner. When an external force is applied to the outer panel body so as to cause a shape change in a section perpendicular to the second direction (Y direction), the reaction force generated by the first outer side corner is further increased due to the presence of the first longitudinal portion. Therefore, compared with a reinforcing member without the first longitudinal portion, the outer panel component is reinforced by the reinforcing member, and the rigidity of the outer panel component is further improved. The effect generated by the first longitudinal portion is also reflected by the second longitudinal portion.

[0078] In the reinforcing member, the outer side transverse portion is connected to the first inner side transverse portion by the first longitudinal portion, and is connected to the second inner side transverse portion by the second longitudinal portion. In this case, the reinforcing member itself has a higher cross-sectional inertia moment than a reinforcing member without the first longitudinal portion and the second longitudinal portion, and as a result, the rigidity of the panel assembly reinforced by the reinforcing member is increased.

[0079] In short, the outer panel body and the inner panel body are connected to each other via the first longitudinal portion and the second longitudinal portion. Therefore, the rigidity of the panel assembly reinforced by the reinforcing member of the present embodiment is higher than the reinforcing effect of reinforcing only by the outer side transverse portion, higher than the reinforcing effect of reinforcing only by the first inner side transverse portion (the second inner side transverse portion) and the first inner side corner portion (the second inner side corner portion), and higher than the reinforcing effect of reinforcing by the outer side transverse portion, the first inner side transverse portion (the second inner side transverse portion), and the first inner side corner portion (the second inner side corner portion). Therefore, even if vibration is transmitted to the panel assembly, the outer panel body and the inner panel body are not easily deformed, the rigidity of the outer panel body and the inner panel body is improved, and the natural vibration frequency is increased compared to the case where there is no reinforcing member.

[0080] In other viewpoints, regarding the outer plate component, the first outer side corner portion connecting the first longitudinal portion to the outer side transverse portion is joined to the outer plate body in the first region. The second outer side corner portion connecting the second longitudinal portion to the outer side transverse portion is joined to the outer plate body in the second region. The first region and the second region are configured in a manner with the top portion spaced therebetween. That is, the first outer side corner portion and the second outer side corner portion are joined to the outer plate body in two regions separated from each other. Therefore, the first region and the second region are not only restricted from relative movement in the second direction, but also from relative movement in the plate thickness direction of the outer plate body. The first region and the second region can maintain a relative positional relationship separated from each other in a manner separated from each other by the protruding top portion in the second direction. Thus, the shape change of the outer plate body in a section perpendicular to the first direction is restricted. In addition, since the reinforcing member has a width in the first direction, the first outer side corner portion and the second outer side corner portion are joined to the first region and the second region of the outer plate body in the first direction with a predetermined width, respectively. Therefore, the shape change of the outer panel body in the section perpendicular to the second direction is restricted. In this way, the shape change of the outer panel body in the section perpendicular to the first direction and the shape change in the section perpendicular to the second direction are restricted, thereby restricting the deformation of the surface shape of the outer panel body. Therefore, the rigidity of the outer panel body is improved.

[0081] Regarding the inner plate component, the first inner side transverse portion and the second inner side transverse portion are configured to be separated from each other in the second direction in a posture along the inner plate body. Moreover, the first inner side transverse portion is connected to the first longitudinal portion using the first inner side corner portion, and the second inner side transverse portion is connected to the second longitudinal portion using the second inner side corner portion. Moreover, the first inner side transverse portion and the second inner side transverse portion are joined to the inner plate body. The first inner side transverse portion along the posture of the inner plate body, for example, is limited in deformation of the surface shape by the first inner side corner portion bent in a manner to become a ridge line. Similarly, the second inner side transverse portion along the posture of the inner plate body, for example, is limited in deformation of the surface shape by the second inner side corner portion bent in a manner to become a ridge line. Therefore, the deformation of the surface shape of the inner plate body joined by the first inner side transverse portion and the second inner side transverse portion is limited. In addition, the first inner side transverse portion and the second inner side transverse portion are separated in the second direction, so that the deformation of the surface shape of the inner plate body can be limited in a larger area corresponding to the setting interval between the two. In this way, by joining the first inner side lateral portion and the second inner side lateral portion to the inner panel main body, the rigidity of the inner panel main body is improved and deformation is difficult to occur.

[0082] Regarding the plate assembly, the relative movement of the first outer side corner portion and the first inner side transverse portion is limited by the first longitudinal portion, and the relative movement of the second outer side corner portion and the second inner side transverse portion is limited by the second longitudinal portion. The first outer side corner portion and the second outer side corner portion are joined to the outer plate body, and the first inner side transverse portion and the second inner side transverse portion are joined to the inner plate body. Therefore, at each position where the first longitudinal portion and the second longitudinal portion are arranged, the relative movement of the plate assembly in the stacking direction (for example, the third direction perpendicular to the first direction and the second direction) of the outer plate body and the inner plate body is limited, and the rigidity of the plate assembly as a whole can be improved.

[0083] Thus, by increasing the rigidity of the outer panel body and the inner panel body, and by connecting the outer panel body and the inner panel body to each other, the rigidity of the entire panel assembly can be increased. Therefore, even in the case where the natural vibration frequency is reduced by thinning and lightening the outer panel member and the inner panel member, the rigidity of the entire panel assembly can be increased according to the first structure, and the reduction in the natural vibration frequency can be suppressed, so that the following panel assembly can be obtained: even if the vibration from the vibration source such as the engine is transmitted to the panel assembly, it is difficult to resonate with the vibration and generate uncomfortable noise transmitted to the occupants.

[0084] As described above, according to the panel assembly of the first structure, even if the panel assembly is reduced in weight, an increase in noise transmitted to the occupants can be suppressed.

[0085] In a typical example, the number of reinforcing members is one. However, the number of reinforcing members may be two or more. When a plurality of reinforcing members are provided, the plurality of reinforcing members are arranged in the first direction.

[0086] The panel assembly preferably has the following structure: In a cross-sectional view perpendicular to the first direction, the first outer corner portion is shaped along the first region of the outer panel body, and the second outer corner portion is shaped along the second region of the outer panel body (second structure).

[0087] In the case of the second structure, the range where the first area of ​​the outer panel body and the first outer side corner of the reinforcing member overlap is large, and the range where the second area of ​​the outer panel body and the second outer side corner of the reinforcing member overlap is large. Therefore, in the range where the first area overlaps the first outer side corner and the range where the second area overlaps the second outer side corner, the interval between the outer panel body and the reinforcing member can be further reduced, so that the outer panel body and the reinforcing member can be joined in a stable state, and good quality joining can be performed. The interval is preferably a substantially constant value.

[0088] The plate assembly preferably has the following structure: the outer side transverse portion, the first longitudinal portion, the second longitudinal portion, the first inner side transverse portion, the second inner side transverse portion, the first outer side corner portion, the second outer side corner portion, the first inner side corner portion, and the second inner side corner portion are all plate-shaped (third structure).

[0089] In the case of the third structure, the reinforcing member is composed of a plate, for example. In this case, the first outer side corner and the second outer side corner joined to the outer plate body are plate-shaped. In addition, the first inner side transverse portion and the second inner side transverse portion joined to the inner plate body are plate-shaped. Therefore, the first outer side corner, the second outer side corner, the first inner side transverse portion, and the second inner side transverse portion can be realized with a simple structure. In addition, the reinforcing member can be obtained by stamping the plate, so the manufacturing cost can be suppressed.

[0090] The panel assembly of the third structure preferably has the following structure: The outer side lateral portion has a flat portion from the first outer side corner portion to the second outer side corner portion in a partial region or the entire region in the width direction (fourth structure).

[0091] In the case of the fourth structure, the outer side transverse portion is not loose, but is tensioned. The outer side transverse portion is set across from the first area of ​​the outer panel body to the second area, and is separated from the top part of the outer panel body. In this case, when an external force is applied to the outer panel body, a tensile force or a compressive force along the second direction is generated in the outer side transverse portion. When the outer side transverse portion is tensioned because the outer side transverse portion has a flat portion, the outer side transverse portion is not easy to deform in the parallel direction (second direction) of the first outer side corner portion and the second outer side corner portion, and a reaction force of a larger tensile force or a reaction force of a compressive force can be generated in the first area and the second area of ​​the outer panel body. Therefore, when a larger external force is applied to the outer panel body, the deformation of the first area and the second area of ​​the outer panel body can also be suppressed. As a result, the natural vibration frequency of the outer panel component can be increased.

[0092] In addition, the outer plate member and the inner plate member are connected via the first longitudinal portion and the second longitudinal portion. Therefore, in the second structure, since the rigidity of the outer plate member is further improved, the rigidity of the inner plate member is also further improved, the plate assembly is not easily deformed, and the natural frequency is also increased.

[0093] The plate assembly of the fourth structure may also have the following structure: the first longitudinal portion has a flat portion from the first outer corner to the first inner corner in a partial area or the entire area in the width direction, and the second longitudinal portion has a flat portion from the second outer corner to the second inner corner in a partial area or the entire area in the width direction (the fifth structure).

[0094] In the case of the fifth structure, the first longitudinal portion and the second longitudinal portion are not relaxed, and the first longitudinal portion and the second longitudinal portion are respectively tensioned. Therefore, when an external force is applied to the outer plate component or the inner plate component, if the first longitudinal portion and the second longitudinal portion are tensioned by having a flat portion, the first longitudinal portion and the second longitudinal portion are respectively less likely to deform in the direction in which the first outer side corner portion and the first inner side corner portion are arranged (along the direction of the first longitudinal portion) and in the direction in which the second outer side corner portion and the second inner side corner portion are arranged (along the direction of the second longitudinal portion), and the rigidity of the plate assembly is further improved. Even if a vibrating external force is transmitted to the plate assembly, the outer plate body and the inner plate body are less likely to deform, and the natural vibration frequencies of the outer plate body and the inner plate body are further increased.

[0095] Any of the third to fifth structures of the panel assembly may include the following structure: A protruding portion is formed on the outer side lateral portion, the protruding portion protruding in the plate thickness direction of the outer side lateral portion and extending in the second direction (sixth structure).

[0096] In the case of the sixth structure, in the cross section perpendicular to the first direction (cross section along the second direction), the rigidity of the outer side transverse portion is improved by the protrusion protruding in the plate thickness direction of the outer side transverse portion. Therefore, even if the outer plate member is vibrated or the inner plate member is vibrated, the vibration of the outer side transverse portion of the reinforcing member can be suppressed. The plate thickness direction of the outer side transverse portion is, for example, a third direction perpendicular to the first direction and the second direction, which is the direction in which the outer plate member and the inner plate member are stacked.

[0097] Here, in the case where the outer side transverse portion has a flat portion and there is no slack in the outer side transverse portion as in the fourth structure, and in the case where the outer side transverse portion has a protrusion protruding in the plate thickness direction as in the sixth structure, the rigidity of the outer side transverse portion is further improved. In this case, compared with the case of only the fourth structure, the outer side transverse portion is more difficult to deform in the direction (second direction) in which the first outer side corner portion and the second outer side corner portion are arranged, and a larger tensile force reaction force or compression force reaction force can be generated in the first area and the second area of ​​the outer plate body. Therefore, in the structure in which the sixth structure is combined with the fourth structure, even when a larger external force is applied to the outer plate body, the deformation of the first area and the second area of ​​the outer plate body is further suppressed compared with the case of only the fourth structure. As a result, the natural vibration frequency of the outer plate component can be increased.

[0098] In the case of the panel assembly of the sixth structure, it is preferable that the protrusion protrudes toward the inner panel body in the plate thickness direction of the outer side lateral portion (the seventh structure). However, the protrusion may protrude toward the outer panel body in the plate thickness direction of the outer side lateral portion.

[0099] The space between the outer panel body and the inner panel body is divided by the outer side transverse portion. That is, the space between the outer panel body and the inner panel body is divided into a space on the inner side (inner panel body side) of the outer side transverse portion and a space on the outer side (outer panel body side) of the outer side transverse portion. The protrusion may protrude toward either the inner side or the outer side of the outer side transverse portion, but in order to prevent interference with the components on the protruding side (outer panel body or inner panel body), it is preferred to protrude toward the side with the larger space. Usually, the space on the inner side of the outer side transverse portion is larger than the space on the outer side of the outer side transverse portion. In this case, the seventh structure is useful.

[0100] Any of the third to seventh structures of the plate assembly preferably has the following structure: the first inner side transverse portion extends to the side opposite to the side where the outer side transverse portion exists with respect to the first longitudinal portion, and the second inner side transverse portion extends to the side opposite to the side where the outer side transverse portion exists with respect to the second longitudinal portion (eighth structure).

[0101] In the case of the eighth structure, the first inner side lateral portion and the second inner side lateral portion extend in directions away from each other. That is, the reinforcing member has a hat-shaped cross section in a cross-sectional view perpendicular to the first direction. In this case, the reinforcing member can be easily manufactured by press forming.

[0102] The panel assembly preferably has the following structure: the first outer corner of the reinforcing member is bonded to the first region of the outer panel body by one or more first adhesive portions. The second outer corner of the reinforcing member is bonded to the second region of the outer panel body by one or more second adhesive portions (ninth structure).

[0103] In the case of the ninth structure, the outer panel body and the reinforcing member are bonded by an adhesive. In this case, the bond traces between the outer panel body and the reinforcing member do not appear on the outer surface of the outer panel body. Therefore, the surface quality and appearance design of the outer panel body observed from the outside are good, and the appearance is good.

[0104] In a typical example, one first adhesive portion is provided in a strip shape along the first direction in the first region, and one second adhesive portion is provided in a strip shape along the first direction in the second region. Alternatively, one first adhesive portion is provided in a linear shape along the first direction in the first region, or one second adhesive portion is provided in a linear shape along the first direction in the second region. Alternatively, a plurality of linear first adhesive portions are provided in parallel to each other in the first region, or a plurality of linear second adhesive portions are provided in parallel to each other in the second region.

[0105] Here, if, as in the second structure, in a cross-sectional view perpendicular to the first direction, the shape of the first outer side corner portion is the shape of the first region along the outer panel body, and the shape of the second outer side corner portion is the shape of the second region along the outer panel body, then when bonding with an adhesive, the interval between the outer panel body and the reinforcing member can be further reduced. Therefore, the outer panel body and the reinforcing member can be bonded in a stable state with an adhesive, and good quality bonding can be performed.

[0106] However, the method of joining the outer panel body and the reinforcing member is not limited to bonding using an adhesive. For example, when the outer appearance of the outer panel body is not required, the joining method may be welding or mechanical fastening.

[0107] The method of joining the inner plate body and the reinforcing member (the first inner side transverse portion and the second inner side transverse portion) is not particularly limited. For example, the joining method is welding. In addition, the joining method may be mechanical fastening or bonding with an adhesive.

[0108] The plate assembly of the ninth structure preferably has the following structure. The plurality of first adhesive portions are dot-shaped and are arranged at intervals in the first direction of the first outer corner. The plurality of second adhesive portions are dot-shaped and are arranged at intervals in the first direction of the second outer corner (the tenth structure).

[0109] In the case of the tenth configuration, the amount of adhesive used can be suppressed.

[0110] In a typical example, the panel assembly is a tailgate for an automobile (Structure No. 11).

[0111] Among various panel components, especially in the tailgate, the tailgate panel as an outer panel component requires rigidity. In addition, the tailgate as a whole is required to be lightweight, and the increase of uncomfortable noise transmitted to the occupants is required to be suppressed. The reasons are as follows. The tailgate has a larger surface area than other panel components. The larger the surface area, the easier it is to resonate. Therefore, when vibrations from the engine, transmission or tires are transmitted to the tailgate, resonance is likely to occur, and roaring and vibration noise are likely to be generated. In other words, the tailgate is a panel component that is prone to resonance and requires an increase in the natural vibration frequency.

[0112] Therefore, as in the 11th structure, the plate assembly is suitable for the tailgate. However, the plate assembly is not limited to the tailgate. For example, the plate assembly may also be a hood (engine hood), a front door, a rear door, and a side panel. In the plate assembly, the reinforcing member is arranged in a manner that the outer side transverse portion extends along the second direction. In the case where the plate assembly is a tailgate, a front door, and a rear door, the second direction is, for example, the vehicle body height direction. In this case, the reinforcing member is arranged in a manner that the outer side transverse portion extends along the vehicle body height direction. However, in the case of a tailgate, a front door, and a rear door, the first direction may also be the vehicle body height direction.

[0113] Hereinafter, a specific example of the panel assembly of the present embodiment will be described with reference to the drawings. The same reference numerals are given to the same or corresponding parts in the drawings, and duplicate descriptions are omitted as appropriate.

[0114] [First embodiment]

[0115] Reference Figure 1 to Figure 3 A panel assembly 100 according to a first embodiment will be described. The panel assembly 100 according to this embodiment is formed by combining an outer panel member 1 and an inner panel member 2. The panel assembly 100 is used in an automobile. For example, the panel assembly 100 is a tailgate.

[0116] In this specification, when indicating directions in the panel assembly 100, the X direction, Y direction, and Z direction that are orthogonal to each other are sometimes used. The X direction and the Y direction are directions in which the outer panel member 1 extends. The Z direction is a direction substantially perpendicular to the direction in which the outer panel member 1 extends, and the outer side O and the inner side I of the outer panel member 1 are indicated by the Z direction. In this specification, the X direction and the Y direction can be referred to as the first direction and the second direction, respectively, and the Z direction can also be referred to as the third direction.

[0117] Here, in Figures 4 to 8 In FIG. 1 , a typical tailgate is shown as a specific example of the panel assembly 100. Figure 4 In FIG. 1 , a top view of a tailgate is shown as a panel assembly 100. Figure 5 , a perspective view of the outer panel component 1 in the panel assembly 100 is shown. Figure 6 , a perspective view of the inner panel component 2 in the panel assembly 100 is shown. Figure 7 In Figure 4 A cross-sectional view of the line VII-VII. Figure 8 , a perspective view showing a state where the reinforcement member 3 is installed on the inner panel body 20. In each figure showing the tailgate, the X direction (first direction) indicates the vehicle width direction, the Y direction (second direction) indicates the vehicle height direction, and the Z direction (third direction) indicates the vehicle front and rear direction.

[0118] Reference Figures 4 to 8The tailgate (panel assembly 100) is mainly composed of an outer panel member 1 and an inner panel member 2. A light, a hinge, a striker, etc. are provided in the space between the outer panel member 1 and the inner panel member 2. In addition, a reinforcing member 3 is provided between the outer panel member 1 and the inner panel member 2 (see Figure 8 ).

[0119] The outer panel component 1 is divided into a lower portion that becomes an exterior surface and an upper portion that becomes a window frame. The lower portion includes an outer panel body 10. The inner panel component 2 is divided into a lower portion that is deeply drawn and an upper portion that becomes a window frame, corresponding to the outer panel component 1. The lower portion includes an inner panel body 20, and there are holes and projections and depressions in this portion. In the outer panel component 1, the portion including the lower side of the outer panel body 10 has, for example, a first edge 11 located on the upper side, a second edge 12 located on the lower side, a third edge 13 located on the left side, and a fourth edge 14 located on the right side. In the inner panel component 2, the portion including the lower side of the inner panel body 20 has a first edge 21 located on the upper side, a second edge 22 located on the lower side, a third edge 23 located on the left side, and a fourth edge 24 located on the right side. The outer panel component 1 and the inner panel component 2 are joined by hemming bending. The outer edge of each of the outer panel component 1 and the inner panel component 2 is joined by hemming. The inner side of the window frame of the upper portion of the outer panel component 1 and the inner panel component 2 is not joined by hemming. Therefore, the first edge 11 and the first edge 21 that become the upper part of the window frame in the portion including the lower side of the outer panel body 10 and the portion including the lower side of the inner panel body 20 are not joined by hemming. For example, the first edge 11 and the first edge 21 are joined by spot welding. The outer edge mentioned here refers to the surrounding portion of each of the outer panel component 1 and the inner panel component 2.

[0120] Reference Figure 4 , Figure 5 as well as Figure 7 The outer panel body 10 has a top portion 10a. The outer panel body 10 is viewed from the outside O (see FIG. Figure 7 ) is convexly curved. In the outer panel body 10, the curved top 10a exists in the extension direction along the X direction. The extension direction of the curved top 10a is convexly curved toward the outer side O. That is, the outer panel body 10 is also convexly curved toward the outer side O in a cross-sectional view perpendicular to the Y direction. Figure 4 and Figure 5 In the example shown, in the outer panel body 10, the top 10a exists separately in the central area and the areas at both ends in the X direction. In this case, there are a plurality of tops 10a. A reinforcing member 3 is provided in each section including each top 10a. However, it is also possible that in the outer panel body 10, one top 10a exists in a straight line from end to end.

[0121] The following, such as Figure 1 to Figure 3 The panel assembly 100 of this embodiment is described using a simplified model of an actual component such as a tailgate. The outer panel body 10 in the panel assembly 100 is not curved in a cross-sectional view perpendicular to the Y direction, and the curved top 10a of the outer panel body 10 extends in a straight line.

[0122] The material of the outer panel component 1 is, for example, metal. The metal is, for example, steel, aluminum, magnesium, aluminum alloy, magnesium alloy, etc. In a typical example, the outer panel component 1 is manufactured by stamping a metal plate. In terms of practicality, the plate thickness of the outer panel component 1, that is, the plate thickness of the metal plate, is greater than 0.3 mm and less than 1.4 mm. In addition, from the viewpoint of formability, the tensile strength of the outer panel component 1 is preferably less than 780 MPa. More preferably, the tensile strength of the outer panel component 1 is greater than 270 MPa and less than 700 MPa.

[0123] The same can be said about the inner panel component 2 as the outer panel component 1. Specifically, the material of the inner panel component 2 is, for example, metal. Examples of metals are steel, aluminum, magnesium, aluminum alloys, magnesium alloys, and the like. The material of the inner panel component 2 is preferably the same as or the same type as the material of the outer panel component 1. This is to avoid contact corrosion between dissimilar metals. However, the materials of the two may also be different. In a typical example, the inner panel component 2 is manufactured by stamping a metal plate. In terms of practicality, the plate thickness of the inner panel component 2, i.e., the plate thickness of the metal plate, is greater than 0.3 mm and less than 1.4 mm. In addition, from the viewpoint of formability, the tensile strength of the inner panel component 2 is preferably less than 780 MPa. More preferably, the tensile strength of the inner panel component 2 is greater than 270 MPa and less than 700 MPa.

[0124] Figure 1 to Figure 3 1 is a diagram showing the overall structure of the panel assembly 100. Figure 1 1 is a perspective view showing the assembled state of the panel assembly 100. Figure 2 FIG. 1 is a perspective view showing an exploded state of the panel assembly 100. Figure 1 and Figure 2 2 shows the panel assembly 100 when viewed from the outer panel member 1 side, that is, the outer side O. Figure 3 The figure shows a cross section perpendicular to the X direction. Figure 1 The plate assembly 100 is shown in cross-section.

[0125] Reference Figure 1 to Figure 3 The panel assembly 100 includes an outer panel component 1 and an inner panel component 2. In addition, the panel assembly 100 includes a reinforcing member 3. In the present embodiment, the number of the reinforcing member 3 is one. However, the number of the reinforcing member 3 may be two or more.

[0126] [Outer panel part 1]

[0127] The outer panel member 1 extends in the X direction (first direction) and in the Y direction (second direction) perpendicular to the X direction. The outer panel member 1 of this embodiment has a rectangular shape when viewed from above along the Z direction. The outer panel member 1 includes an outer panel body 10. Figure 1 and Figure 2 In the figure, the outer panel body 10 is rectangular in a top view when viewed along the Z direction. The four corners of the rectangular shape are rounded. However, the outer panel component 1 can be rectangular, trapezoidal, pentagonal, or other shapes other than rectangular when viewed from above. For example, in the case where the panel assembly 100 is a tailgate, the outer panel component 1 can also have a window frame (window frame) on any side. The corners when viewed from above when viewed along the Z direction can also be rounded.

[0128] The outer panel body 10 is rectangular in a plan view and thus has four ends. The outer panel member 1 includes a first edge 11, a second edge 12, a third edge 13, and a fourth edge 14 around the outer panel body 10. The first edge 11 is arranged at one end of the outer panel body 10 in the Y direction (second direction). The second edge 12 is arranged at the other end of the outer panel body 10 in the Y direction. The third edge 13 is arranged at one end of the outer panel body 10 in the X direction (first direction). The fourth edge 14 is arranged at the other end of the outer panel body 10 in the X direction.

[0129] exist Figure 1 and Figure 2 2 shows an example in which the outer panel body 10 is in a square shape when viewed from above. However, the outer panel body 10 may be in a rectangular shape, a trapezoidal shape, a pentagonal shape, or any other shape other than a rectangular shape when viewed from above. The corners when viewed from above may also be rounded.

[0130] Reference Figure 3 , the outer panel main body 10 is bent convexly toward the outer side O in a sectional view perpendicular to the X direction (first direction). Therefore, the outer panel main body 10 has a top 10a. The cross-sectional shape of the outer panel main body 10 is, for example, an arc shape. However, in a sectional view perpendicular to the X direction (first direction), the shape of the outer panel main body 10 may be an elliptical arc shape or other convex curve shape as long as it is a shape convex toward the outer side O. For example, in the cross-sectional shape of the outer panel main body 10, the curvature radius of the bend is 200mm to 2000mm. The curvature radius may also vary. In addition, the outer panel main body 10 also extends in the X direction (first direction) and the Y direction (second direction) perpendicular to the X direction, similarly to the outer panel component 1. In addition, in Figure 3 2 and 3 show an exaggerated cross-sectional shape of the outer panel body 10. This also applies to the following figures.

[0131] [Inner panel part 2]

[0132] The inner panel component 2 is arranged on the inner side I of the outer panel component 1. The inner panel component 2 includes an inner panel body 20, an inner panel punch shoulder 200, an inner panel side wall 201, an inner panel die shoulder 202, and an inner panel flange 203. In a cross-sectional view perpendicular to the X direction (first direction), the inner panel body 20 is located in the center, the inner panel punch shoulder 200 connects the inner panel body 20 and the inner panel side wall 201, and the inner panel die shoulder 202 connects the inner panel side wall 201 and the inner panel flange 203. Figure 1 and Figure 2 In the figure, the inner plate body 20 has a flat shape. However, the inner plate body 20 may have a concave-convex shape, a hole, or a curved shape. In addition, in a cross-sectional view perpendicular to the X direction (first direction), the inner plate side walls 201 sandwiched between the inner plate body 20 may be set to be unequal to each other, so that the inner plate body 20 is inclined relative to the Y direction. In addition, in a cross-sectional view perpendicular to the Y direction (second direction), the inner plate side walls 201 sandwiched between the inner plate body 20 may be set to be unequal to each other, so that the inner plate body 20 is inclined relative to the X direction.

[0133] The inner panel body 20 is opposite to the outer panel body 10. Figure 1 and Figure 2 In the embodiment, the inner plate body 20 is rectangular in a plan view along the Z direction. However, the inner plate body 20 may be rectangular, trapezoidal, pentagonal, or other shapes when viewed from above. The corners when viewed from above may also be rounded.

[0134] The inner plate body 20 is rectangular in a plan view and thus has four ends. The inner plate member 2 includes a first edge 21, a second edge 22, a third edge 23, and a fourth edge 24 around the inner plate body 20. The first edge 21 is arranged at one end of the inner plate body 20 in the Y direction (second direction). That is, the first edge 21 is arranged at a position corresponding to the first edge 11 of the outer plate member 1. The second edge 22 is arranged at the other end of the inner plate body 20 in the Y direction. That is, the second edge 22 is arranged at a position corresponding to the second edge 12 of the outer plate member 1. The third edge 23 is arranged at one end of the inner plate body 20 in the X direction (first direction). That is, the third edge 23 is arranged at a position corresponding to the third edge 13 of the outer plate member 1. The fourth edge 24 is arranged at the other end of the inner plate body 20 in the X direction. That is, the fourth edge 24 is arranged at a position corresponding to the fourth edge 14 of the outer plate member 1 .

[0135] Each edge 21, 22, 23 and 24 of the inner panel member 2 includes an inner panel punch shoulder 200, an inner panel side wall 201, an inner panel die shoulder 202 and an inner panel flange 203. Each flange 203 is joined to the corresponding edge 11, 12, 13 and 14 of the outer panel member 1. In the present embodiment, each edge 21, 22, 23 and 24 of the inner panel member 2 is joined to the corresponding edge 11, 12, 13 and 14 of the outer panel member 1 by hemming processing (folding back processing). Thus, the inner panel member 2 is integrated with the outer panel member 1, and a space V is formed between the outer panel body 10 and the inner panel body 20. However, for example, when the panel assembly 100 is a tailgate, there is a window frame between the outer panel member 1 and the inner panel member 2. In this case, the hemming processing is not performed on each edge inside the window frame, but the hemming processing is performed along the outer edge of the window frame.

[0136] However, the integration method of the inner plate member 2 and the outer plate member 1 is not limited to the folding process. For example, the integration method may be welding, mechanical fastening, or adhesive. Welding may be spot welding or laser welding.

[0137] In the outer panel member 1, the boundary between the outer panel body 10 and the edge portions 11, 12, 13, and 14 is defined as follows. When the outer panel member 1 is integrated with the inner panel member 2, the outer panel member 1 has a portion that is overlapped with the flange 203 of the inner panel member 2 in a state of contact with the flange 203. In the outer panel member 1, the portion that is overlapped with the flange 203 of the inner panel member 2 in a state of contact with the flange 203 is the edge portions 11, 12, 13, and 14, and the central portion that is not overlapped with the flange 203 of the inner panel member 2 is the outer panel body 10.

[0138] [Reinforcement member 3]

[0139] The reinforcing member 3 is disposed in a space V between the outer panel body 10 and the inner panel body 20. The reinforcing member 3 has a hat-shaped cross section in a cross-sectional view perpendicular to the X direction (first direction).

[0140] The material of the reinforcing member 3 is, for example, metal. Metal is, for example, steel, aluminum, magnesium, aluminum alloy, magnesium alloy, etc. The material of the reinforcing member 3 is preferably the same or the same type as the material of the outer plate component 1 and the material of the inner plate component 2. This is to avoid contact corrosion of dissimilar metals. The material of the reinforcing member 3 is preferably the same as the material of the outer plate component 1 and the inner plate component 2. Sometimes the plate assembly 100 is subjected to baking coating. In this case, if the material is the same, the linear expansion coefficient is the same. As a result, when baking coating is performed, the thermal deformation caused by the difference in linear expansion coefficient between the elements (reinforcing member 3, outer plate component 1 and inner plate component 2) can be reduced. However, the materials of the two can also be different. In a typical example, the reinforcing member 3 is manufactured by stamping a metal plate. The plate thickness of the reinforcing member 3 is not particularly limited. In terms of practicality, the plate thickness of the reinforcing member 3, that is, the plate thickness of the metal plate, can be 0.10 mm or more, and more preferably 0.15 mm or more. If the plate thickness is thicker, the reinforcing member 3 becomes heavier, so in consideration of the lightweight effect, the plate thickness is preferably 0.8 mm or less. The tensile strength of the reinforcing member 3 is not particularly limited. From the perspective of ease of stamping, when a steel plate is used, the tensile strength of the reinforcing member 3 is 270 MPa or more and 700 MPa or less.

[0141] The reinforcing member 3 includes an outer side transverse portion 30, a first longitudinal portion 31, a second longitudinal portion 32, a first inner side transverse portion 33, a second inner side transverse portion 34, a first outer side corner portion 35, a second outer side corner portion 36, a first inner side corner portion 37, and a second inner side corner portion 38. The outer side transverse portion 30 is flat over the entire region and substantially extends in the Y direction (second direction). The first outer side corner portion 35 connects the outer side transverse portion 30 and the first longitudinal portion 31. The second outer side corner portion 36 connects the outer side transverse portion 30 and the second longitudinal portion 32.

[0142] In a cross-sectional view perpendicular to the X direction (first direction), the outer side cross section 30 has a portion that is straight from the first outer side corner 35 to the second outer side corner 36. In other viewpoints, the outer side cross section 30 has a portion that is flat from the first outer side corner 35 to the second outer side corner 36 in the entire width direction. In this case, in the section perpendicular to the X direction, the outer side cross section 30 is not loose, but the outer side cross section 30 is tensioned. In the present embodiment, the outer side cross section 30 is flat in the entire area, and therefore, in the entire cross-sectional view perpendicular to the X direction, the outer side cross section 30 is straight. However, it is also possible that the outer side cross section 30 has a portion that is flat from the first outer side corner 35 to the second outer side corner 36 in a part of the width direction. Figure 3In the example shown, the outer side transverse portion 30 extends in the Y direction. In the outer side transverse portion 30, the length (width) in the X direction (first direction) may be smaller than the length in the Y direction (second direction). The length (width) in the X direction is preferably less than half of the length in the Y direction, and more preferably less than 1 / 3 of the length in the Y direction. The length (width) in the X direction is, for example, preferably more than 1 / 10 of the length in the Y direction. However, the length (width) in the X direction may be the same as the length in the Y direction, or may be greater than the length in the Y direction.

[0143] For example, in the outer side transverse portion 30, if the length (width) in the X direction is less than half of the length in the Y direction, the outer side transverse portion 30 becomes a shape that is appropriately slender in the Y direction. In this case, the reinforcing member 3 can be made lightweight. If the length (width) in the X direction is less than 1 / 3 of the length in the Y direction, a better effect can be obtained. If there is a reinforcing member 3, the rigidity of the outer panel body 10 located directly above the reinforcing member 3 in the Z direction increases. In addition, by reinforcing with the reinforcing member 3, the rigidity of the outer panel body 10 located around the reinforcing member 3 in the Z direction increases. Therefore, even if the reinforcing member 3 is slender, the effect of improving the rigidity can be obtained. However, if the length (width) in the X direction is less than 1 / 10 of the length in the Y direction, although the reinforcing member 3 can be made lightweight, the effect of improving the rigidity is reduced.

[0144] However, the outer side lateral portion 30 may be inclined with respect to the Y direction in a cross-sectional view perpendicular to the X direction. Fig. 9 Indicates an example. Fig. 9 In the example shown, the outer side lateral portion 30 is inclined relative to the Y direction in a cross-sectional view perpendicular to the X direction. In addition, the outer side lateral portion 30 may be inclined relative to the Y direction when viewed from the Z direction. In addition, the outer side lateral portion 30 may be inclined relative to the X direction in a cross-sectional view perpendicular to the Y direction.

[0145] Back to Figure 3 , the first longitudinal portion 31 is flat in the entire region and substantially extends along the Z direction. The second longitudinal portion 32 is also flat in the entire region, substantially extending along the Z direction, similar to the first longitudinal portion 31. The first longitudinal portion 31 may be inclined relative to the Z direction in a cross-sectional perspective perpendicular to the X direction, or may extend strictly along the Z direction. The second longitudinal portion 32 may be inclined relative to the Z direction in a cross-sectional perspective perpendicular to the X direction, similar to the first longitudinal portion 31, or may extend strictly along the Z direction. In addition, the first longitudinal portion 31 may be inclined relative to the X direction when viewed from the Z direction. The second longitudinal portion 32 may be inclined relative to the X direction when viewed from the Z direction, similar to the first longitudinal portion 31.

[0146] The first inner side corner portion 37 connects the first longitudinal portion 31 and the first inner side transverse portion 33. The first inner side transverse portion 33 substantially follows the shape of the inner panel body 20 and extends to the side opposite to the side where the outer side transverse portion 30 exists with respect to the first longitudinal portion 31. Figure 1 and Figure 2 In the embodiment, the first inner side transverse portion 33 is flat. The second inner side corner portion 38 connects the second longitudinal portion 32 and the second inner side transverse portion 34. The second inner side transverse portion 34 substantially follows the shape of the inner panel body 20 and extends to the side opposite to the side where the outer side transverse portion 30 exists relative to the second longitudinal portion 32. Figure 1 and Figure 2 In the embodiment, the second inner lateral portion 34 is flat.

[0147] The first inner side lateral portion 33 and the second inner side lateral portion 34 are substantially shaped along the inner panel body 20. Figure 3 In the example shown, the first inner lateral portion 33 is not inclined with respect to the Y direction and extends strictly in the Y direction. The second inner lateral portion 34 also extends strictly in the Y direction similarly to the first inner lateral portion 33 .

[0148] However, depending on the shape of the inner panel body 20, the first inner side lateral portion 33 may be inclined relative to the Y direction in a cross-sectional view perpendicular to the X direction. The second inner side lateral portion 34 may be inclined relative to the Y direction in a cross-sectional view perpendicular to the X direction, similarly to the first inner side lateral portion 33. Fig.10 An example is shown below. Fig.10 In the example shown, the first inner side transverse portion 33 and the second inner side transverse portion 34 are inclined relative to the Y direction in a cross-sectional view perpendicular to the X direction. In addition, the first inner side transverse portion 33 may be inclined relative to the X direction in a cross-sectional view perpendicular to the Y direction. The second inner side transverse portion 34 may be inclined relative to the X direction in a cross-sectional view perpendicular to the Y direction, similarly to the first inner side transverse portion 33. In addition, the first inner side transverse portion 33 may be inclined relative to the Y direction when viewed from the Z direction. The second inner side transverse portion 34 may be inclined relative to the Y direction when viewed from the Z direction, similarly to the first inner side transverse portion 33.

[0149] Back to Figure 3 The first inner side transverse portion 33 and the second inner side transverse portion 34 are preferably formed along the shape of the inner panel body 20 corresponding to each other, and are more preferably flat. However, in order to remove water and coating liquid during painting, the first inner side transverse portion 33 and the second inner side transverse portion 34 may be provided with a base surface, a groove (Japanese: back-cut), or other concave-convex shapes. In addition, the first inner side transverse portion 33 and the second inner side transverse portion 34 may also have a hole.

[0150] In the cross-sectional view perpendicular to the X direction (first direction), the first longitudinal portion 31 has a portion that is linear from the first outer corner 35 to the first inner corner 37, and the second longitudinal portion 32 has a portion that is linear from the second outer corner 36 to the second inner corner 38. In other viewpoints, the first longitudinal portion 31 has a portion that is flat from the first outer corner 35 to the first inner corner 37 in the entire width direction, and the second longitudinal portion 32 has a portion that is flat from the second outer corner 36 to the second inner corner 38 in the entire width direction. In this case, in the cross section perpendicular to the X direction, the first longitudinal portion 31 and the second longitudinal portion 32 are not relaxed, and the first longitudinal portion 31 and the second longitudinal portion 32 are respectively tensed. In the present embodiment, the first longitudinal portion 31 and the second longitudinal portion 32 are flat in the entire region, and therefore, in the entire cross section perpendicular to the X direction, the first longitudinal portion 31 and the second longitudinal portion 32 are linear. However, the first longitudinal portion 31 may have a flat portion from the first outer corner 35 to the first inner corner 37 in a portion in the width direction. The second longitudinal portion 32 may have a flat portion from the second outer corner 36 to the second inner corner 38 in a portion in the width direction.

[0151] In the present embodiment, the first longitudinal portion 31 is not arranged at a negative angle relative to the outer lateral portion 30, and the second longitudinal portion 32 is not arranged at a negative angle relative to the outer lateral portion 30. Figure 3 As shown, the angle θ1 formed by the outer side transverse portion 30 and the first longitudinal portion 31 is a right angle or an obtuse angle (90° or more), and the angle θ2 formed by the outer side transverse portion 30 and the second longitudinal portion 32 is a right angle or an obtuse angle. Angles θ1 and θ2 refer to the angles on the inner side I (the inner plate body 20 side) of the outer side transverse portion 30. In this case, when the reinforcing member 3 is manufactured by stamping, the manufactured product can be demolded from the mold. Therefore, the reinforcing member 3 can be easily manufactured by stamping.

[0152] The reinforcing member 3 disposed between the outer panel body 10 and the inner panel body 20 is joined to the outer panel body 10 and also joined to the inner panel body 20. Figure 3The first outer corner 35 of the reinforcing member 3 is joined to the outer panel body 10 in the first region 10b separated from the top 10a in the outer panel body 10. The first region 10b is a region closer to the first edge 11 of the outer panel member 1. Specifically, the first region 10b is a region closer to the first edge 11 side than the middle position between the top 10a and the first edge 11. However, the first region 10b may be located in the middle of the top 10a and the first edge 11. The second outer corner 36 of the reinforcing member 3 is joined to the outer panel body 10 in the second region 10c in the outer panel body 10, and the second region 10c is located on the side opposite to the first region 10b with respect to the top 10a. The second region 10c is a region closer to the second edge 12 of the outer panel member 1. Specifically, the second region 10c is a region closer to the second edge 12 side than the middle position between the top 10a and the second edge 12. However, the second region 10c may be located between the top portion 10a and the second edge portion 12. The first inner side lateral portion 33 and the second inner side lateral portion 34 of the reinforcing member 3 are joined to the inner panel body 20, respectively.

[0153] The reinforcing member 3 has a width in the X direction (first direction). The width of the reinforcing member 3 is constant. However, the width of the reinforcing member 3 may not be constant.

[0154] In the present embodiment, in the cross-sectional view perpendicular to the X direction (first direction), the shape of the first outer corner 35 is a shape along the first region 10b of the outer panel body 10. In this case, the first region 10b of the outer panel body 10 and the first outer corner 35 of the reinforcing member 3 overlap in a wide range, and the interval between the outer panel body 10 and the reinforcing member 3 can be reduced within the overlap range of the first region 10b and the first outer corner 35. The shape of the second outer corner 36 is a shape along the second region 10c of the outer panel body 10. In this case, the second region 10c of the outer panel body 10 and the second outer corner 36 of the reinforcing member 3 overlap in a wide range, and the interval between the outer panel body 10 and the reinforcing member 3 can be reduced within the overlap range of the second region 10c and the second outer corner 36. Therefore, the outer panel body 10 and the reinforcing member 3 can be joined in a stable posture (state), and good quality joining can be performed. The interval is preferably a substantially constant value. In addition, in addition to the cross-sectional view perpendicular to the X direction (first direction), it is also preferred that the shape of the first outer corner 35 is along the shape of the first region 10b of the outer panel body 10, and the shape of the second outer corner 36 is along the shape of the second region 10c of the outer panel body 10 in the cross-sectional view perpendicular to the Y direction (second direction). In the cross-sectional view perpendicular to the X direction (first direction) and the Y direction (second direction), if the first outer corner 35 is along the shape of the first region 10b and the second outer corner 36 is along the shape of the second region 10c, the outer panel body 10 and the reinforcing member 3 can be joined with better quality.

[0155] In the outer panel body 10 , the first region 10 b is a region corresponding to the first outer corner portion 35 , and the second region 10 c is a region corresponding to the second outer corner portion 36 .

[0156] In the present embodiment, the first outer corner portion 35 is in the shape along the first region 10b of the outer panel body 10, and the inclination direction of the outer surface of the first outer corner portion 35 is consistent with the inclination direction of the inner surface of the first region 10b in both the cross-sectional view perpendicular to the X direction and the cross-sectional view perpendicular to the Y direction. Similarly, the second outer corner portion 36 is in the shape along the second region 10c of the outer panel body 10, and the inclination direction of the outer surface of the second outer corner portion 36 is consistent with the inclination direction of the inner surface of the second region 10c in both the cross-sectional view perpendicular to the X direction and the cross-sectional view perpendicular to the Y direction.

[0157] Here, in the cross-sectional view perpendicular to the X direction, the inclination direction of the outer surface of the first outer corner portion 35 coincides with the inclination direction of the inner surface of the first region 10b, which means that in the cross-sectional view perpendicular to the X direction (first direction), the inclination direction of the outer surface of the first outer corner portion 35 is substantially parallel to the inclination direction of the inner surface of the first region 10b of the outer panel body 10. Substantially parallel in the cross-sectional view perpendicular to the X direction (first direction) means that the angle formed by the inclination directions of the two is within 6°. In addition, in the cross-sectional view perpendicular to the Y direction, the inclination direction of the outer surface of the first outer corner portion 35 coincides with the inclination direction of the inner surface of the first region 10b, which means that in the cross-sectional view perpendicular to the Y direction (second direction), the inclination direction of the outer surface of the first outer corner portion 35 is substantially parallel to the inclination direction of the inner surface of the first region 10b of the outer panel body 10. Substantially parallel in a cross-sectional view perpendicular to the Y direction (second direction) means that the angle formed by the two inclined directions is within 6°.

[0158] Similarly, in the cross-sectional view perpendicular to the X direction, the inclination direction of the outer surface of the second outer corner portion 36 coincides with the inclination direction of the inner surface of the second region 10c, which means that in the cross-sectional view perpendicular to the X direction (first direction), the inclination direction of the outer surface of the second outer corner portion 36 is substantially parallel to the inclination direction of the inner surface of the second region 10c of the outer plate body 10. Substantially parallel in the cross-sectional view perpendicular to the X direction (first direction) means that the angle formed by the inclination directions of the two is within 6°. In addition, in the cross-sectional view perpendicular to the Y direction, the inclination direction of the outer surface of the second outer corner portion 36 coincides with the inclination direction of the inner surface of the second region 10c, which means that in the cross-sectional view perpendicular to the Y direction (second direction), the inclination direction of the outer surface of the second outer corner portion 36 is substantially parallel to the inclination direction of the inner surface of the second region 10c of the outer plate body 10. Substantially parallel in a cross-sectional view perpendicular to the Y direction (second direction) means that the angle formed by the two inclined directions is within 6°.

[0159] In addition, in a cross-sectional view perpendicular to the X direction (first direction), the inclination direction of the inner surface of the first region 10b of the outer panel body 10 refers to the inclination direction of the straight line connecting the two ends of the inner surface of the first region 10b. In addition, in a cross-sectional view perpendicular to the Y direction (second direction), the inclination direction of the inner surface of the first region 10b of the outer panel body 10 refers to the inclination direction of the straight line connecting the two ends of the inner surface of the first region 10b. Similarly, in a cross-sectional view perpendicular to the X direction (first direction), the inclination direction of the inner surface of the second region 10c of the outer panel body 10 refers to the inclination direction of the straight line connecting the two ends of the inner surface of the second region 10c. In addition, in a cross-sectional view perpendicular to the Y direction (second direction), the inclination direction of the inner surface of the second region 10c of the outer panel body 10 refers to the inclination direction of the straight line connecting the two ends of the inner surface of the second region 10c.

[0160] In addition, in the cross-sectional view perpendicular to the X direction, the inclination direction of the outer surface of the first outer corner portion 35 refers to the inclination direction of the straight line connecting the two ends of the outer surface of the first outer corner portion 35. In addition, in the cross-sectional view perpendicular to the Y direction, the inclination direction of the outer surface of the first outer corner portion 35 refers to the inclination direction of the straight line connecting the two ends of the outer surface of the first outer corner portion 35. Similarly, in the cross-sectional view perpendicular to the X direction, the inclination direction of the outer surface of the second outer corner portion 36 refers to the inclination direction of the straight line connecting the two ends of the outer surface of the second outer corner portion 36. In addition, in the cross-sectional view perpendicular to the Y direction, the inclination direction of the outer surface of the second outer corner portion 36 refers to the inclination direction of the straight line connecting the two ends of the outer surface of the second outer corner portion 36.

[0161] As described above, in the cross-sectional shape of the outer panel body 10, the curvature radius of the curve is 200 mm to 2000 mm. The curvature radius may also be varied. Therefore, the first outer corner portion 35 and the second outer corner portion 36 may each be substantially flat.

[0162] From the viewpoint of the ease of manufacturing the reinforcing member 3, Figure 3As shown in FIG. 1 , the shape of the first outer corner portion 35 is preferably flat, and the shape of the second outer corner portion 36 is preferably flat. In this case, more specifically, in a cross-sectional view perpendicular to the X direction (first direction), the first outer corner portion 35 has a straight portion, a smaller arc-shaped portion connecting one end of the straight portion and the outer side transverse portion 30, and a smaller arc-shaped portion connecting the other end of the straight portion and the first longitudinal portion 31. In addition, in a cross-sectional view perpendicular to the Y direction (second direction), the first outer corner portion 35 has a straight portion. Similarly, in a cross-sectional view perpendicular to the X direction (first direction), the second outer corner portion 36 has a straight portion, a smaller arc-shaped portion connecting one end of the straight portion and the outer side transverse portion 30, and a smaller arc-shaped portion connecting the other end of the straight portion and the second longitudinal portion 32. In addition, in a cross-sectional view perpendicular to the Y direction (second direction), the second outer corner portion 36 has a straight portion.

[0163] As described above, from the viewpoint of the ease of manufacturing the reinforcing member 3, the shapes of the first outer corner 35 and the second outer corner 36 are preferably flat, but from the viewpoint of the increase in the natural frequency, the shape of the first outer corner 35 is preferably curved along the first region 10b, and the shape of the second outer corner 36 is preferably curved along the second region 10c. More specifically, in a cross-sectional view perpendicular to the X direction (first direction), the first outer corner 35 has a portion curved along the first region 10b, a small arc-shaped portion connecting one end of the curved portion to the outer side transverse portion 30, and a small arc-shaped portion connecting the other end of the curved portion to the first longitudinal portion 31. In addition, in a cross-sectional view perpendicular to the Y direction (second direction), the first outer corner 35 has a straight portion. Similarly, in a cross-sectional view perpendicular to the X direction (first direction), the second outer corner portion 36 has a portion bent along the second region 10c, a smaller arc-shaped portion connecting one end of the bent portion to the outer side transverse portion 30, and a smaller arc-shaped portion connecting the other end of the bent portion to the second longitudinal portion 32. In addition, in a cross-sectional view perpendicular to the Y direction (second direction), the second outer corner portion 36 has a straight portion.

[0164] Furthermore, in both the cross-sectional view perpendicular to the X direction (first direction) and the cross-sectional view perpendicular to the Y direction (second direction), even when the outer panel body 10 is curved convexly outward, the shapes of the first outer corner 35 and the second outer corner 36 are preferably flat from the viewpoint of ease of manufacturing the reinforcing member 3. On the other hand, from the viewpoint of an increase in the natural frequency, in the cross-sectional view perpendicular to the Y direction (second direction), the first outer corner 35 may have a portion curved along the first region 10b. Similarly, in the cross-sectional view perpendicular to the Y direction (second direction), the second outer corner 36 may have a portion curved along the second region 10c.

[0165] The figure shows a case where the shape of the first outer corner 35 is along the shape of the first region 10b of the outer panel body 10 in both the cross-sectional view perpendicular to the X direction and the cross-sectional view perpendicular to the Y direction, but the shape of the first outer corner 35 may not be along the shape of the first region 10b of the outer panel body 10 in the cross-sectional view perpendicular to the Y direction. In addition, the figure shows a case where the shape of the second outer corner 36 is along the shape of the second region 10c of the outer panel body 10 in both the cross-sectional view perpendicular to the X direction and the cross-sectional view perpendicular to the Y direction, but the shape of the second outer corner 36 may not be along the shape of the second region 10c of the outer panel body 10 in the cross-sectional view perpendicular to the Y direction.

[0166] Here, the first outer corner portion 35 of the reinforcing member 3 is joined to the first region 10b of the outer panel body 10 by one first adhesive portion 41 , and the second outer corner portion 36 of the reinforcing member 3 is joined to the second region 10c of the outer panel body 10 by one second adhesive portion 42 .

[0167] Fig.11 1 is a perspective view of the reinforcing member 3 of the panel assembly 100 according to the first embodiment. Fig.11 , one first adhesive portion 41 is provided over the entire area of ​​the first outer corner portion 35, and one second adhesive portion 42 is provided over the entire area of ​​the second outer corner portion 36. In this case, one first adhesive portion 41 is provided in a strip shape along the X direction (first direction) in the first region 10b, and one second adhesive portion 42 is provided in a strip shape along the X direction in the second region 10c.

[0168] In short, refer to Figure 1 to Figure 3 In the case of the present embodiment, the outer panel body 10 and the reinforcing member 3 are bonded by an adhesive. In this case, the bond traces between the outer panel body 10 and the reinforcing member 3 do not appear on the outer surface of the outer panel body 10. Therefore, the outer panel body 10 has a good appearance when viewed from the outside O, and has excellent appearance design and surface quality.

[0169] The adhesive used in the first adhesive portion 41 and the second adhesive portion 42 is, for example, a rubber elastic body with synthetic rubber as the main component. This adhesive is generally referred to as an adhesive. Since the first adhesive portion 41 and the second adhesive portion 42 are respectively rubber elastic bodies, each adhesive portion 41 and 42 can adhere the reinforcing member 3 to the outer plate body 10 while adapting to the curved outer plate body 10. In particular, as described above, if the shape of the first outer side corner portion 35 is a shape along the first region 10b of the outer plate body 10, the thickness of the first adhesive portion 41 is uniform. Similarly, if the shape of the second outer side corner portion 36 is a shape along the second region 10c of the outer plate body 10, the thickness of the second adhesive portion 42 is uniform. In this case, the outer plate body 10 and the reinforcing member 3 can be joined in a more stable state (posture), and a better quality joint can be performed.

[0170] However, the method of joining the outer panel body 10 and the reinforcing member 3 is not limited to bonding by an adhesive. That is, the method of joining the outer panel body 10 and the reinforcing member 3 (the first outer corner 35 and the second outer corner 36) is not particularly limited. For example, when the appearance of the outer panel body 10 is not required, the joining method may be welding or mechanical fastening. Welding is, for example, spot welding. Welding may also be laser welding.

[0171] The method for joining the inner plate body 20 and the reinforcing member 3 (the first inner side transverse portion 33 and the second inner side transverse portion 34) is not particularly limited. For example, the joining method is welding. Welding is, for example, spot welding. Welding may also be laser welding. In addition, the joining method may be mechanical fastening or bonding with an adhesive.

[0172] [Effect]

[0173] The first outer corner portion 35 and the second outer corner portion 36 of the reinforcing member 3 are respectively joined to the outer panel body 10. Therefore, the outer side lateral portion 30 is provided from the first region 10b to the second region 10c of the outer panel body 10, and is separated from the top 10a of the outer panel body 10. Since the first outer side corner portion 35 and the second outer side corner portion 36 are joined to the outer panel body 10, for example, the outer side lateral portion 30 is separated from the outer panel body 10. The outer side lateral portion 30 is not joined to the outer panel body 10. However, in the outer side lateral portion 30, the vicinity of the first outer side corner portion 35 and the vicinity of the second outer side corner portion 36 may be joined to the outer panel body 10. In this case, when an external force is applied to the outer panel body 10, a tensile force or a compressive force along the second direction is generated in the outer side lateral portion 30. On the other hand, the first region 10b and the second region 10c of the outer panel body 10 receive a reaction force of the tensile force or the compression force along the second direction from the outer side lateral portion 30. Thus, the relative positional relationship of the first region 10b and the second region 10c of the outer panel body 10 separated from each other by the top of the protrusion can be maintained, and the shape change of the outer panel body 10 in the section perpendicular to the first direction can be suppressed. The reinforcing member 3 has a width in the X direction (the first direction). Therefore, the first outer side corner portion 35 and the second outer side corner portion 36 are respectively joined to the first region 10b and the second region 10c of the outer panel body 10 with a predetermined width in the first direction. Therefore, when the first region 10b and the second region 10c of the outer panel body 10 want to change their shape in the section perpendicular to the Y direction (the second direction), the first outer side corner portion 35 and the second outer side corner portion 36 will also generate a reaction force thereto. Therefore, the shape change of the outer panel body 10 can also be suppressed in the cross section perpendicular to the second direction. In this way, the shape change of the outer panel body 10 in the cross section perpendicular to the first direction and the shape change in the cross section perpendicular to the second direction can be suppressed, thereby suppressing the deformation of the surface shape of the outer panel body 10. Therefore, the outer panel component 1 is reinforced by the reinforcing member 3, and the rigidity of the outer panel component 1 is improved.

[0174] In addition, the first inner side transverse portion 33 is connected to the first longitudinal portion 31 via the first inner side corner portion 37, and the second inner side transverse portion 34 is connected to the second longitudinal portion 32 via the second inner side corner portion 38. The reinforcing member 3 has a width in the first direction, so the first inner side transverse portion 33 and the second inner side transverse portion 34 are respectively joined to the inner panel body 20 with a predetermined width in the first direction. This produces the following effects. For example, when an external force is applied to the inner panel body 20 so as to cause a shape change in a cross section perpendicular to the second direction (Y direction), the first inner side transverse portion 33 and the second inner side transverse portion 34 generate a reaction force corresponding to the region that is separately joined to the first inner side transverse portion 33 and the second inner side transverse portion 34. Therefore, the shape change of the inner panel body 20 can be suppressed also in the cross section perpendicular to the second direction. That is, the inner panel component 2 is reinforced by the reinforcing member 3, and the rigidity of the inner panel component 2 is improved.

[0175] In addition, regarding the elements of the reinforcing member 3 disposed on the inner plate part 2 side, the first inner side corner portion 37 is connected to the first inner side transverse portion 33, and the first longitudinal portion 31 is connected to the first inner side corner portion 37. When an external force is applied to the inner plate body 20 so as to cause a shape change in a cross section perpendicular to the second direction (Y direction), the reaction force generated by the first inner side transverse portion 33 and the second inner side transverse portion 34 is further increased due to the presence of the first longitudinal portion 31. Therefore, compared with a reinforcing member without the first longitudinal portion 31, the inner plate part 2 is reinforced by the reinforcing member 3, and the rigidity of the inner plate part 2 is further improved. The effect generated by the first longitudinal portion 31 is also reflected by the second longitudinal portion 32.

[0176] In addition, regarding the elements of the reinforcing member 3 disposed on the outer panel part 1 side, the first outer side corner portion 35 is connected to the outer side transverse portion 30, and the first longitudinal portion 31 is connected to the first outer side corner portion 35. When an external force is applied to the outer panel body 10 so as to cause a shape change in a cross section perpendicular to the second direction (Y direction), the reaction force generated by the first outer side corner portion 35 is further increased due to the presence of the first longitudinal portion 31. Therefore, compared with a reinforcing member without the first longitudinal portion 31, the outer panel part 1 is reinforced by the reinforcing member 3, and the rigidity of the outer panel part 1 is further improved. The effect generated by the first longitudinal portion 31 is also reflected by the second longitudinal portion 32.

[0177] In the reinforcing member 3, the outer side transverse portion 30 is connected to the first inner side transverse portion 33 by the first longitudinal portion 31, and is connected to the second inner side transverse portion 34 by the second longitudinal portion 32. In this case, compared with a reinforcing member without the first longitudinal portion and the second longitudinal portion (for example, a reinforcing member composed of the outer side transverse portion 30, the first outer side corner portion 35 and the second outer side corner portion 36, a reinforcing member composed of the first inner side corner portion 37 and the first inner side transverse portion 33, and a reinforcing member composed of the second inner side corner portion 38 and the second inner side transverse portion 34), the section moment of inertia of the reinforcing member 3 itself is higher, and as a result, the rigidity of the panel assembly 100 reinforced by the reinforcing member 3 is improved. In addition, the first longitudinal portion 31 and the second longitudinal portion 32 of the reinforcing member 3 extend from the outer panel body 10 to the inner panel body 20, respectively, and the outer panel body 10 and the inner panel body 20 are supported by each other via the reinforcing member 3. In this case, the components with increased rigidity are connected to each other, so when an external force is applied to one component, the external force is also transmitted to the other component that is not subjected to the external force. Since there are two components to be deformed, the deformation amount of the outer panel body 10 and the inner panel body 20 becomes smaller.

[0178] In short, the outer panel body 10 and the inner panel body 20 are connected to each other via the first longitudinal portion 31 and the second longitudinal portion 32. Therefore, the rigidity of the panel assembly 100 reinforced by the reinforcing member 3 is higher than the reinforcing effect of the outer side transverse portion 30 alone, higher than the reinforcing effect of the first inner side transverse portion 33 (second inner side transverse portion 34) and the first inner side corner portion 37 (second inner side corner portion 38), and higher than the reinforcing effect of the outer side transverse portion 30, the first inner side transverse portion 33 (second inner side transverse portion 34) and the first inner side corner portion 37 (second inner side corner portion 38). Therefore, even if vibration is transmitted to the panel assembly 100, the outer panel body 10 and the inner panel body 20 are not easily deformed, the rigidity of the outer panel body 10 and the inner panel body 20 becomes higher, and the natural vibration frequency increases compared to the case where the reinforcing member 3 is not provided.

[0179] As described above, according to the panel assembly 100 of the present embodiment, the rigidity of each of the outer panel member 1 and the inner panel member 2 is improved by the reinforcement member 3. Furthermore, the outer panel member 1 and the inner panel member 2 having improved rigidity are connected to each other by the reinforcement member 3. Therefore, by the reinforcement member 3, the rigidity of the outer panel member 1 is further improved, and the rigidity of the inner panel member 2 is further improved. That is, the rigidity of the panel assembly 100 is further improved, and the natural vibration frequency of the panel assembly 100 is further increased. Therefore, even if the panel assembly 100 is made lighter, the increase in uncomfortable noise transmitted to the occupant can be suppressed.

[0180] [Preferable condition 1: Size of the reinforcing member 3 in the Y direction (second direction)]

[0181] Fig.12This is a cross-sectional view showing a condition 1 which is suitable in the panel assembly 100 according to the first embodiment. Fig.12 and Figure 3 Corresponding. That is, Fig.12 The figure shows a cross section taken along a plane perpendicular to the X direction (first direction). Figure 1 A cross-sectional view of the plate assembly 100 is shown. Fig.12 In a cross-sectional view perpendicular to the X direction, the elements of the panel assembly 100 are defined as follows.

[0182] The length in the Y direction (second direction) from the top 10a of the outer panel body 10 to the end of the outer panel body 10 on the first region 10b side is referred to as P1. The end of the outer panel body 10 on the first region 10b side corresponds to the end on the first edge 11 side of the two ends of the outer panel body 10 in the Y direction (second direction). The length in the second direction from the top 10a of the outer panel body 10 to the junction between the first outer corner 35 and the outer panel body 10 is referred to as S1. Strictly speaking, the junction between the first outer corner 35 and the outer panel body 10 refers to the position of the center of the first outer corner 35 in the Y direction (second direction) in a cross-sectional view perpendicular to the X direction. The length in the second direction from the top 10a of the outer panel body 10 to the junction between the first inner side lateral portion 33 and the inner panel body 20 is referred to as T1. Strictly speaking, the junction between the first inner side lateral portion 33 and the inner panel body 20 refers to the position of the center of the junction in the Y direction (second direction) in a cross-sectional view perpendicular to the X direction. The lengths P1, S1, and T1 defined in this way preferably satisfy the relationship of the following equations (1) to (3).

[0183] 0.35≤S1 / P1≤0.80···(1)

[0184] 0.50≤T1 / P1≤0.90···(2)

[0185] S1<T1···(3)

[0186] In addition, Fig.12 In the embodiment, the outer panel body 10 is a rectangular component, and therefore, P1, S1, and T1 when cut along a plane perpendicular to the X direction (first direction) are consistent with P1, S1, and T1 when viewed from above. When it is not a rectangular component and the size of P1 changes along the X direction, P1, S1, and T1 when cut along a plane perpendicular to the X direction (first direction) preferably satisfy the relationship of the above-mentioned formulas (1) to (3).

[0187] Furthermore, the length in the Y direction (second direction) from the top 10a of the outer panel body 10 to the end of the outer panel body 10 on the second region 10c side is set as P2. The end of the outer panel body 10 on the second region 10c side corresponds to the end on the second edge 12 side of the two ends of the outer panel body 10 in the Y direction (second direction). The length in the second direction from the top 10a of the outer panel body 10 to the junction between the second outer corner 36 and the outer panel body 10 is set as S2. Strictly speaking, the junction between the second outer corner 36 and the outer panel body 10 refers to the position of the center of the second outer corner 36 in the Y direction (second direction) in the cross-sectional view perpendicular to the X direction. The length in the second direction from the top 10a of the outer panel body 10 to the junction between the second inner side lateral portion 34 and the inner panel body 20 is set as T2. Strictly speaking, the junction between the second inner side lateral portion 34 and the inner panel body 20 refers to the position of the center of the junction in the Y direction (the second direction) in a cross-sectional view perpendicular to the X direction. The lengths P2, S2, and T2 defined in this way preferably satisfy the relationship of the following equations (4) to (6).

[0188] 0.35≤S2 / P2≤0.80···(4)

[0189] 0.50≤T2 / P2≤0.90···(5)

[0190] S2<T2···(6)

[0191] In addition, Fig.12 In the embodiment, the outer panel body 10 is a rectangular component, and therefore, P2, S2, and T2 when cut along a plane perpendicular to the X direction (first direction) are consistent with P2, S2, and T2 when viewed from above. When it is not a rectangular component and the size of P2 changes along the X direction, P2, S2, and T2 when cut along a plane perpendicular to the X direction (first direction) preferably satisfy the relationship of the above-mentioned formulas (4) to (6).

[0192] In order to reliably increase the natural vibration frequency of the outer panel component 1 and the inner panel component 2, the length of the reinforcing member 3 in the Y direction (the second direction) is within an appropriate range. However, regarding the length in the Y direction, if the reinforcing member 3 is too large relative to the outer panel body 10, the joint between the reinforcing member 3 and the outer panel body 10 is far from the center of the outer panel body 10, and the joint between the reinforcing member 3 and the inner panel body 20 is far from the center of the inner panel body 20.

[0193] Since the center of the outer panel body 10 is far from the edge of the outer panel body 10, the amplitude of the vibration tends to increase. Therefore, if the joint between the reinforcing member 3 and the outer panel body 10 is far from the center of the outer panel body 10, it is difficult to suppress the vibration generated in the outer panel body 10, and the effect of increasing the natural vibration frequency is reduced. In addition, since the center of the inner panel body 20 is far from the edge of the inner panel body 20, the amplitude of the vibration tends to increase. Therefore, if the joint between the reinforcing member 3 and the inner panel body 20 is far from the center of the inner panel body 20, it is difficult to suppress the vibration generated in the inner panel body 20, and the effect of increasing the natural vibration frequency is small.

[0194] In this regard, satisfying equations (1) and (4) means that the interval (S1+S2) between the two joints of the reinforcing member 3 relative to the outer panel body 10 is appropriately large with respect to the length in the Y direction (second direction). That is, it means that the total length of the outer side lateral portion 30 is appropriately large with respect to the length in the Y direction. Satisfying equations (2) and (5) means that the interval (T1+T2) between the two joints of the reinforcing member 3 relative to the inner panel body 20 is appropriately large with respect to the length in the Y direction. Therefore, if these equations are satisfied, the natural vibration frequencies of the outer panel member 1 and the inner panel member 2 can be reliably increased.

[0195] In addition, by satisfying the formula (3), the joint between the first inner side lateral portion 33 and the inner panel body 20 is arranged at a position closer to the outside than the joint between the first outer side corner portion 35 and the outer panel body 10. By satisfying the formula (6), the joint between the second inner side lateral portion 34 and the inner panel body 20 is arranged at a position closer to the outside than the joint between the second outer side corner portion 36 and the outer panel body 10. In such an outer side arrangement of the joint, the moment of inertia of the section of the reinforcing member is increased compared to the inner side arrangement, and the rigidity of the reinforcing member and the panel assembly 100 is increased. Therefore, when the outer panel component 1 and the inner panel component 2 are about to vibrate due to the vibration transmitted to the panel assembly 100, vibration is less likely to occur due to the increased rigidity. Therefore, the natural vibration frequency of the outer panel component 1 and the inner panel component 2 increases.

[0196] Furthermore, in order to satisfy that the first longitudinal portion 31 is not arranged at a negative angle relative to the outer side transverse portion 30 and the second longitudinal portion 32 is not arranged at a negative angle relative to the outer side transverse portion 30, at least equations (3) and (6) need to be satisfied. Therefore, if these equations are satisfied, the reinforcing member 3 can be easily manufactured by press forming.

[0197] Furthermore, the reinforcing member 3 is joined to the inner panel body 20 at the first inner side transverse portion 33 and the second inner side transverse portion 34. Even if the length of the first inner side transverse portion 33 in the Y direction (second direction) is large, the effect on the performance is small. If the length is too large, the weight of the reinforcing member 3 increases. On the other hand, if the length is too small, it is difficult to ensure the joining area. Therefore, the length of the first inner side transverse portion 33 in the Y direction is preferably not less than 10 mm and not more than 30 mm. Based on the same viewpoint, the length of the second inner side transverse portion 34 in the Y direction is preferably not less than 10 mm and not more than 30 mm.

[0198] The length of the reinforcing member 3 in the Y direction (second direction) may also be specified according to the curved shape of the outer panel body 10. That is, when the dimensions of P1 and P2 in the outer panel body 10 gradually change along the X direction (first direction), the length of the reinforcing member 3 in the Y direction may also gradually change along the X direction.

[0199] [Preferable condition 2: Size of the reinforcing member 3 in the X direction (first direction)]

[0200] Fig.13 2 is a plan view showing a condition 2 which is suitable for the panel assembly 100 according to the first embodiment. Fig.13 The figure shows the Z direction when viewed from the outside O. Figure 1 The top view of the plate assembly 100 is shown. Fig.13 The reinforcing member 3 hidden behind the outer panel body 10 is shown by a solid line.

[0201] Reference Fig.13 , the elements of the panel assembly 100 are defined as follows. The length from one end to the other end of the outer panel body 10 in the X direction (first direction) is set to Q. One end of the outer panel body 10 in the X direction corresponds to the end on the side of the third edge 13. The other end of the outer panel body 10 in the X direction corresponds to the end on the side of the fourth edge 14. In this case, the length W of the reinforcing member 3 in the X direction preferably satisfies the relationship of the following formula (7).

[0202] 0.01×Q≤W≤0.50×Q···(7)

[0203] The length W of the reinforcing member 3 in the X direction may also be referred to as the width of the reinforcing member 3. The length (width) W of the reinforcing member 3 in the X direction is the average value of the length of the outer lateral portion 30 in the X direction over the entire Y direction of the outer lateral portion 30.

[0204] In addition, Fig.13In the figure, the outer panel body 10 is a rectangular component, so Q when cut with a plane perpendicular to the Y direction (second direction) is consistent with Q when viewed from above. When it is not a rectangular component and the size changes along the Y direction, Q when cut with a plane perpendicular to the Y direction (second direction) preferably satisfies the relationship of the above formula (7).

[0205] In order to reliably increase the natural vibration frequency of the outer plate component 1 and the inner plate component 2, the length W of the reinforcing member 3 in the X direction (first direction) is preferably large. However, if the length W is too large, the weight of the reinforcing member 3 increases. On the other hand, even if the length W is small, the performance can be exerted. However, if the length W is too small, the length of the first inner side transverse portion 33 and the second inner side transverse portion 34 in the X direction (first direction) also becomes small, and it is difficult to ensure the bonding area. Therefore, the length W is preferably 5 mm or more.

[0206] In this regard, satisfying equation (7) means that, with respect to the length in the X direction (first direction), the length W (width) of the reinforcing member 3 relative to the outer panel body 10 is of an appropriate size. Therefore, if equation (7) is satisfied, the increase in weight can be suppressed, and the natural vibration frequencies of the outer panel member 1 and the inner panel member 2 can be reliably increased.

[0207] The length W of the reinforcing member 3 in the X direction more preferably satisfies the relationship of the following formula (7′) which is stricter than the condition of the above formula (7).

[0208] 0.05×Q≤W≤0.30×Q···(7')

[0209] If the expression (7′) is satisfied, the natural frequencies of the outer panel member 1 and the inner panel member 2 can be reliably increased while further suppressing an increase in weight.

[0210] [Preferable condition 3: Position of the reinforcing member 3 in the X direction (first direction)]

[0211] Fig.14 1 is a plan view showing a condition 3 which is suitable for the panel assembly 100 of the first embodiment. Fig.13 Similarly, in Fig.14 The figure shows the Z direction when viewed from the outside O. Figure 1 The plate assembly 100 is shown in a top view.

[0212] Reference Fig.14 , the elements of the panel assembly 100 are defined as follows. Fig.13Similarly, the length from one end to the other end of the outer panel body 10 in the X direction (first direction) is Q. In this case, the reinforcing member 3 is preferably laminated with at least a portion of the length range from the position of 0.45×Q to the position of 0.55×Q in the X direction (first direction) of the outer panel body 10. Here, one end of the outer panel body 10 in the X direction (first direction) is set to the position of 0, and the other end is set to the position of Q.

[0213] As described in the above-mentioned preferred condition 1, the center of the outer panel body 10 is separated from the edge of the outer panel body 10. Therefore, the center of the outer panel body 10 in the X direction (first direction) is easily bent by vibration.

[0214] In this regard, under the present preferred condition 3, the reinforcing member 3 is present at least in the approximate center of the outer panel body 10 in the X direction (first direction). Therefore, the vibration generated in the outer panel body 10 can be more fully suppressed, and the natural vibration frequency of the outer panel component 1 can be increased. However, it is preferred that the reinforcing member 3 is present in the center of the outer panel body 10 in the X direction.

[0215] [Second embodiment]

[0216] Fig.15 It is a perspective view of the reinforcing member 3 in the panel assembly 100 according to the second embodiment. Fig.16 It is a cross-sectional view of a panel assembly 100 including a reinforcing member 3 according to the second embodiment. This embodiment is a modification of the first embodiment.

[0217] Reference Fig.15 and Fig.16 In the present embodiment, in the cross-sectional view perpendicular to the X direction (first direction), the shapes of the first outer corner 35 and the second outer corner 36 are not along the first region 10b and the second region 10c of the outer panel body 10. The cross-sectional shape of the first outer corner 35 is an arc shape, and the radius of the arc is sufficiently small relative to the radius of curvature of the outer panel body 10. For example, the radius of curvature of the first outer corner 35 is 1 / 50 or less of the radius of curvature of the first region 10b of the outer panel body 10, which is different from the first embodiment. Similarly, the cross-sectional shape of the second outer corner 36 is an arc shape, and the radius of the arc is sufficiently small relative to the radius of curvature of the outer panel body 10. For example, the radius of curvature of the second outer corner 36 is 1 / 50 or less of the radius of curvature of the second region 10c of the outer panel body 10, which is different from the first embodiment.

[0218] Here, in the cross-sectional shape of the first outer corner portion 35, the radius of curvature of the arc may be constant or variable. In the case where the radius of curvature varies, the radius of curvature can be defined by an arc passing through three points, namely, the intersection point between the outer side transverse portion 30 and the first outer corner portion 35, the center point of the first outer corner portion 35, and the intersection point between the first outer corner portion 35 and the first longitudinal portion 31, at a cross-sectional viewing angle perpendicular to the X direction (first direction). Similarly, in the cross-sectional shape of the second outer corner portion 36, the radius of curvature of the arc may be constant or variable.

[0219] In the case of the present embodiment, the range in which the first region 10b of the outer panel body 10 and the first outer corner 35 of the reinforcing member 3 overlap is narrow. Similarly, the range in which the second region 10c of the outer panel body 10 and the second outer corner 36 of the reinforcing member 3 overlap is narrow. Therefore, the thickness of the first adhesive portion 41 cannot be called uniform, and the thickness of the second adhesive portion 42 cannot be called uniform, but the reinforcing member 3 can be joined to the outer panel body 10. Therefore, the cross-sectional shape of each of the first outer corner 35 and the second outer corner 36 may also be an arc shape. However, as in the present embodiment, if the curvature radius of the first outer corner 35 is less than 1 / 50 of the curvature radius of the first region 10b of the outer panel body 10, the joining strength between the outer panel body 10 and the reinforcing member 3 becomes lower than the case in which the first outer corner 35 is along the first region 10b as in the first embodiment. Similarly, if the curvature radius of the second outer corner portion 36 is less than 1 / 50 of the curvature radius of the second region 10 c of the outer panel body 10 , the bonding strength between the outer panel body 10 and the reinforcing member 3 is lower than when the second outer corner portion 36 is along the second region 10 c as in the first embodiment.

[0220] [Third embodiment]

[0221] Fig.17 It is a perspective view of the reinforcing member 3 in the panel assembly 100 according to the third embodiment. Fig.18 It is a cross-sectional view of a panel assembly 100 including a reinforcing member 3 according to a third embodiment. This embodiment is a modification of the first embodiment.

[0222] Reference Fig.17 and Fig.18 In this embodiment, a protrusion 30a is formed on the outer side lateral portion 30. The protrusion 30a protrudes in the plate thickness direction of the outer side lateral portion 30 and extends along the Y direction (the second direction). The shape of the cross section of the protrusion 30a perpendicular to the Y direction changes along the Y direction. Fig.17 and Fig.18In the example shown, the protrusion 30a protrudes in the plate thickness direction toward the inner panel body 20. The outer side lateral portion 30 has a flat portion from the first outer side corner 35 to the second outer side corner 36 in a portion in the width direction, that is, on both sides of the protrusion 30a.

[0223] When external force of vibration is applied from the outside, if the outer side lateral portion 30 is simply flat, the center of the outer side lateral portion 30 may easily vibrate in the cross section perpendicular to the X direction (first direction). In other words, by providing the reinforcing member 3, the outer plate member 1 and the inner plate member 2 are reinforced, and even if vibration is applied, it is not easy to generate noise. However, if the outer side lateral portion 30 is simply flat, the reinforcing member 3 may easily vibrate, and the reinforcing member 3 itself may become a noise source.

[0224] In this regard, in the present embodiment, the protrusion 30a provided on the outer side transverse portion 30 has two side walls extending in the Y direction (second direction) standing relative to the outer side transverse portion 30. The side walls of the protrusion 30a further improve the rigidity of the outer side transverse portion 30. Therefore, the rigidity of the outer side transverse portion 30 is further improved, and even if the plate assembly 100 is vibrated, the natural vibration frequency of the outer side transverse portion 30 of the reinforcing member 3 is further increased, and the effect of suppressing the generation of noise from the reinforcing member can be improved.

[0225] Furthermore, the rigidity of the outer plate member 1 is further improved by the protrusion 30a provided on the outer side transverse portion 30. In addition, the rigidity of the inner plate member 2 is also further improved by combining the outer plate member 1 with the reinforcing member 3. Thus, the natural vibration frequencies of the outer plate member 1 and the inner plate member 2 can be further increased, and the effect of suppressing the generation of noise from the plate assembly 100 can be improved.

[0226] Here, the space V between the outer panel body 10 and the inner panel body 20 is divided by the outer side lateral portion 30. That is, the space V between the outer panel body 10 and the inner panel body 20 is divided into a space on the inner side I (inner panel body 20 side) of the outer side lateral portion 30 and a space on the outer side O (outer panel body 10 side) of the outer side lateral portion 30. In the present embodiment, the protrusion 30a protrudes toward the inner panel body 20 (inner side I) in the plate thickness direction. In the case of the present embodiment, the space on the inner side I of the outer side lateral portion 30 is larger than the space on the outer side O of the outer side lateral portion 30. In this case, it is possible to prevent the protrusion 30a from interfering with the member on the protruding side (i.e., the inner panel body 20).

[0227] However, the protrusion 30a may protrude toward either the inner side I or the outer side O of the outer side lateral portion 30. However, in order to prevent interference with the member on the protruding side (the outer panel body 10 or the inner panel body 20), the protrusion 30a preferably protrudes toward the side with a larger space.

[0228] The protruding portion 30a may reach the first outer corner portion 35 or further reach the first longitudinal portion 31. In addition, the protruding portion 30a may reach the second outer corner portion 36 or further reach the second longitudinal portion 32.

[0229] The direction in which the protrusion 30a extends may be inclined relative to the direction in which the outer side lateral portion 30 extends (the direction in which the first outer side corner portion 35 and the second outer side corner portion 36 are arranged). That is, the direction in which the protrusion 30a extends may be inclined relative to the Y direction (the second direction).

[0230] In the outer side lateral portion 30, the protrusion 30a is preferably located at the center of the direction in which the outer side lateral portion 30 extends. In the outer side lateral portion 30, since the center of the direction in which the outer side lateral portion 30 extends is easy to vibrate, by locating the protrusion 30a at the center of the direction in which the outer side lateral portion 30 extends, the rigidity is further improved and the natural vibration frequency can be further increased.

[0231] [Modification 1]

[0232] Fig.19 1 is a perspective view of a first modification of the reinforcing member 3 in the panel assembly 100 according to the third embodiment. Fig.19 In the first modification, the shape of the cross section of the protrusion 30 a perpendicular to the Y direction is constant along the Y direction.

[0233] [Modification 2]

[0234] Fig. 20 2 is a perspective view of a second modification of the reinforcing member 3 in the panel assembly 100 according to the third embodiment. Fig. 20 In the second modification, two protrusions 30a are provided on the outer side transverse portion 30. The two protrusions 30a are arranged in the X direction (first direction). The number of the protrusions 30a can be one or more than three. In short, a plurality of protrusions 30a can be provided on the outer side transverse portion 30.

[0235] [Variation 3]

[0236] Fig.21 3 is a perspective view of a third modification of the reinforcing member 3 in the panel assembly 100 according to the third embodiment. Fig.21 In the modification 3, a hole 30b is provided at the bottom of the protrusion 30a in the Z direction. The hole 30b can reduce the weight of the reinforcing member 3.

[0237] In each of the protrusions 30a of the modified examples 1 to 3, there are two side walls extending in the Y direction (second direction) standing up from the outer side lateral portion 30. Such side walls of the protrusions 30a improve the rigidity of the outer side lateral portion 30. In addition, in the outer side lateral portion 30, the region without the protrusions 30a is a flat portion from the first outer side corner 35 to the second outer side corner 36.

[0238] In the present embodiment, the size of the protrusion 30a affects the magnitude of the effect of reducing the vibration generation of the outer lateral portion 30. Therefore, it is important to define the size of the protrusion 30a.

[0239] The height of the protrusion 30a is preferably 2.5 times or more the thickness of the outer side lateral portion 30, and more preferably 5.0 times or more the thickness of the outer side lateral portion 30. In addition, the length of the protrusion 30a in the Y direction (second direction) is preferably 2 / 3 or more of the length of the outer side lateral portion 30 in the Y direction.

[0240] The protrusion 30 a of the present embodiment can be applied not only to the reinforcing member 3 of the first embodiment but also to the reinforcing member 3 of the second embodiment.

[0241] [Fourth embodiment]

[0242] Fig. 22 It is a perspective view of the reinforcing member 3 in the panel assembly 100 according to the fourth embodiment. Fig.23 It is a cross-sectional view of a panel assembly 100 including a reinforcing member 3 according to a fourth embodiment. This embodiment is a modification of the third embodiment.

[0243] Reference Fig. 22 and Fig.23 In this embodiment, a stepped first protrusion 31a is formed in the first longitudinal portion 31. The first protrusion 31a protrudes in the plate thickness direction of the first longitudinal portion 31 and extends along the Z direction. The shape of the cross section of the first protrusion 31a perpendicular to the Z direction is constant along the Z direction. The first protrusion 31a reaches the first inner side corner portion 37 and further reaches the first inner side transverse portion 33. Fig. 22 and Fig.23 In the example shown, the first protrusion 31a protrudes toward the side in the plate thickness direction where the first inner side lateral portion 33 exists. Similar to the first protrusion 31a, the second protrusion 32a is formed in the second longitudinal portion 32. The first longitudinal portion 31 has a flat portion from the first outer side corner 35 to the first inner side corner 37 on both sides of the first protrusion 31a in the width direction. The second longitudinal portion 32 has a flat portion from the second outer side corner 36 to the second inner side corner 38 on both sides of the second protrusion 32a in the width direction.

[0244] If the first longitudinal portion 31 is simply flat and the length along the Z direction of the first longitudinal portion 31 is large, the center of the first longitudinal portion 31 may be easily vibrated in the cross section perpendicular to the X direction. In this regard, in the present embodiment, in the first protrusion 31a provided in the first longitudinal portion 31, there are two side walls extending in the Z direction standing relative to the first longitudinal portion 31. The rigidity of the first longitudinal portion 31 is improved by such side walls of the first protrusion 31a. Therefore, even if the outer plate member 1 is vibrated or the inner plate member 2 is vibrated, the vibration of the first longitudinal portion 31 of the reinforcing member 3 can be effectively suppressed.

[0245] Furthermore, if the second longitudinal portion 32 is simply flat and the length along the Z direction of the second longitudinal portion 32 is large, the center of the second longitudinal portion 32 may be easily vibrated in the cross section perpendicular to the X direction. In this regard, in the present embodiment, in the second protruding portion 32a provided in the second longitudinal portion 32, there are two side walls extending in the Z direction standing relative to the second longitudinal portion 32. Such side walls of the second protruding portion 32a improve the rigidity of the second longitudinal portion 32. Therefore, even if the outer plate member 1 is vibrated or the inner plate member 2 is vibrated, the vibration of the second longitudinal portion 32 of the reinforcing member 3 can be effectively suppressed.

[0246] Furthermore, the first protrusion 31a provided on the first longitudinal portion 31 improves the rigidity of the first longitudinal portion 31, and the second protrusion 32a provided on the second longitudinal portion 32 improves the rigidity of the second longitudinal portion 32. Thus, the rigidity of the outer plate member 1 and the inner plate member 2 connected via the first longitudinal portion 31 and the second longitudinal portion 32 is further improved. Thus, the natural vibration frequencies of the outer plate member 1 and the inner plate member 2 can be further increased, and the effect of suppressing the generation of noise from the plate assembly 100 can be improved.

[0247] The first protrusion 31a may be Fig. 22 , Fig.23 In this way, the second protrusion 32a protrudes toward the side where the first inner side lateral portion 33 exists, or toward the side where the outer side lateral portion 30 exists. Similarly, the second protrusion 32a may protrude toward the side where the outer side lateral portion 30 exists.

[0248] like Fig. 22 and Fig.23 As shown, the first protrusion 31a reaches the first inner side corner portion 37, further reaches the first inner side transverse portion 33, and further reaches the first outer side corner portion 35, and further reaches the outer side transverse portion 30. Similarly, the second protrusion 32a reaches the second inner side corner portion 38, further reaches the second inner side transverse portion 34, and further reaches the second outer side corner portion 36, and further reaches the outer side transverse portion 30.

[0249] [Variation 4]

[0250] Fig.24 1 is a perspective view of a fourth modification of the reinforcing member 3 in the panel assembly 100 according to the fourth embodiment. Fig.24 In modification example 4, three first protrusions 31a are provided at the first outer side corner 35 and the first longitudinal portion 31. The three first protrusions 31a are arranged in the X direction (first direction). The first protrusion 31a protrudes toward the side in the plate thickness direction where the outer side transverse portion 30 exists. The number of first protrusions 31a can be two or more than four. In short, a plurality of first protrusions 31a can be provided at the first outer side corner 35 and the first longitudinal portion 31. However, one or more first protrusions 31a can be provided only at the first longitudinal portion 31. In addition, the first protrusion 31a can be provided from the first longitudinal portion 31 to the first inner side corner 37.

[0251] Furthermore, three second protrusions 32a are provided at the second outer side corner 36 and the second longitudinal portion 32. The three second protrusions 32a are arranged in the X direction (first direction). The second protrusions 32a protrude toward the side in the plate thickness direction where the outer side transverse portion 30 exists. The number of second protrusions 32a can be two or more than four. In short, a plurality of second protrusions 32a can be provided at the second outer side corner 36 and the second longitudinal portion 32. However, one or more second protrusions 32a can also be provided only at the second longitudinal portion 32. In addition, the second protrusions 32a can also be provided from the second longitudinal portion 32 to the second inner side corner 38.

[0252] [Variation 5]

[0253] Fig.25 1 is a perspective view of a fifth modification of the reinforcing member 3 in the panel assembly 100 according to the fourth embodiment. Fig.25 In the fifth modification, the first hole 31b is provided in the first longitudinal portion 31. The first protrusion is not provided in the first longitudinal portion 31. The first hole 31b can reduce the weight of the reinforcing member 3. Similarly, the second hole 32b is provided in the second longitudinal portion 32.

[0254] Even if the first longitudinal portion 31 is only flat, if the length of the first longitudinal portion 31 along the Z direction is small, the rigidity of the first longitudinal portion 31 has a small effect on vibration. Therefore, the first hole 31b may be provided in the first longitudinal portion 31. Furthermore, even if the second longitudinal portion 32 is only flat, if the length of the second longitudinal portion 32 along the Z direction is small, the rigidity of the second longitudinal portion 32 has a small effect on vibration. Therefore, the second hole 32b may be provided in the second longitudinal portion 32. However, the first hole 31b and the second hole 32b are preferably small in size or do not exist.

[0255] In addition, in the first longitudinal portion 31, the region without the first protrusion 31a is a straight portion from the first outer corner 35 to the first inner corner 37. In the second longitudinal portion 32, the region without the second protrusion 32a is a straight portion from the second outer corner 36 to the second inner corner 38. In another viewpoint, the first longitudinal portion 31 has a flat portion from the first outer corner 35 to the first inner corner 37 in a portion in the width direction, i.e., on both sides of the first hole 31b. The second longitudinal portion 32 has a flat portion from the second outer corner 36 to the second inner corner 38 in a portion in the width direction, i.e., on both sides of the second hole 32b.

[0256] In the present embodiment, the size of the first protrusion 31a affects the size of the effect of reducing the vibration of the first longitudinal portion 31. The size of the second protrusion 32a affects the size of the effect of reducing the vibration of the second longitudinal portion 32. Therefore, it is important to define the size of each of the first protrusion 31a and the second protrusion 32a.

[0257] The height of the first protrusion 31a is preferably 2.5 times or more of the thickness of the first longitudinal portion 31, and more preferably 5.0 times or more of the thickness of the first longitudinal portion 31. In addition, the length of the first protrusion 31a in the Z direction is preferably 2 / 3 or more of the length of the first longitudinal portion 31 in the Z direction. The same can be said for the second protrusion 32a.

[0258] [Fifth embodiment]

[0259] Fig.26 It is a perspective view of the reinforcing member 3 in the panel assembly 100 of the fifth embodiment. This embodiment is a modification of the fourth embodiment.

[0260] Reference Fig.26 In this embodiment, a protrusion 30a is formed at the open edge of the outer side lateral portion 30 along the Y direction (second direction). The protrusion 30a is formed at the center of the open edge of the outer side lateral portion 30. A part of the open edge of the outer side lateral portion 30 is bent toward the inner side I (the inner plate body 20 side), and thus the protrusion 30a protrudes toward the inner side I. The outer side lateral portion 30 has a flat portion from the first outer side corner portion 35 to the second outer side corner portion 36 between the protrusions 30a in the width direction.

[0261] The first protrusion 31a is formed at the open edge of the first longitudinal portion 31 along the Z direction (third direction). The first protrusion 31a is formed at the center of the open edge of the first longitudinal portion 31. A portion of the open edge of the first longitudinal portion 31 is bent toward the side where the outer side transverse portion 30 is present in the plate thickness direction, so that the first protrusion 31a protrudes toward the side where the outer side transverse portion 30 is present. Similar to the first protrusion 31a, the second protrusion 32a is formed at the open edge of the second longitudinal portion 32. The first longitudinal portion 31 has a flat portion from the first outer side corner 35 to the first inner side corner 37 in a portion in the width direction, i.e., between the first protrusions 31a. The second longitudinal portion 32 has a flat portion from the second outer side corner 36 to the second inner side corner 38 in a portion in the width direction, i.e., between the second protrusions 32a.

[0262] Furthermore, a third protrusion 33a is formed on the first inner side transverse portion 33. Specifically, the third protrusion 33a is formed on the open edge of the first inner side transverse portion 33 along the Y direction (the second direction). The third protrusion 33a is formed at the center of the open edge of the first inner side transverse portion 33. A portion of the open edge of the first inner side transverse portion 33 is bent toward the outer side O (the outer panel body 10 side), whereby the third protrusion 33a protrudes toward the outer side O. Similar to the third protrusion 33a, a fourth protrusion 34a is formed on the second inner side transverse portion 34.

[0263] [Variation 6]

[0264] Fig. 27 1 is a perspective view of a sixth modification of the reinforcing member 3 in the panel assembly 100 according to the fifth embodiment. Fig. 27 In the sixth modification, the protrusion 30 a is formed over the entire region of the open edge of the outer lateral portion 30 along the Y direction (the second direction).

[0265] The first protrusion 31a is formed over the entire open edge of the first longitudinal portion 31 along the Z direction (third direction). Similarly to the first protrusion 31a, the second protrusion 32a is formed over the entire open edge of the second longitudinal portion 32.

[0266] The third protrusion 33a is formed in the entire region of the open edge along the Y direction (the second direction) of the first inner side lateral portion 33. Similarly to the third protrusion 33a, the fourth protrusion 34a is formed in the entire region of the second inner side lateral portion 34. Furthermore, the third protrusion 33aa is formed in the open edge along the X direction (the first direction) of the first inner side lateral portion 33. Similar to the third protrusions 33a and 33aa, the fourth protrusions 34a and 34aa are formed in the second inner side lateral portion 34.

[0267] In addition, the above-mentioned protrusions 30a, 31a, 32a, 33a, 34a, 33aa, 34aa may be located at each of the outer side transverse portion 30, the first longitudinal portion 31, the second longitudinal portion 32, the first inner side transverse portion 33, and the second inner side transverse portion 34, or a part thereof. In addition, the same protrusions as described above may be formed at the first outer side corner portion 35, the second outer side corner portion 36, the first inner side corner portion 37, and the second inner side corner portion 38. The protrusion formed at the first outer side corner portion 35 and the protrusion formed at the second outer side corner portion 36 preferably protrude toward the side opposite to the outer panel body 10, that is, toward the inner panel body 20. The protrusion formed at the first inner side corner portion 37 and the protrusion formed at the second inner side corner portion 38 preferably protrude toward the side opposite to the inner panel body 20, that is, toward the outer panel body 10.

[0268] [Sixth embodiment]

[0269] Fig.28 It is a perspective view of the reinforcing member 3 in the panel assembly 100 of the sixth embodiment. This embodiment is a modification of the first embodiment.

[0270] Reference Fig.28 In this embodiment, one first adhesive portion 41 is provided at a part of the first outer corner portion 35. In this case, one first adhesive portion 41 is provided in a linear shape along the X direction (first direction) in the first region. In addition, one second adhesive portion 42 is provided at a part of the second outer corner portion 36. In this case, one second adhesive portion 42 is provided in a linear shape along the X direction in the second region.

[0271] [Variation 7]

[0272] Fig.29 1 is a perspective view of a seventh modification of the reinforcing member 3 in the panel assembly 100 according to the sixth embodiment. Fig.29 In the modification 7, a plurality of linear first adhesive portions 41 are provided in parallel to each other at the first outer corner portion 35. In addition, a plurality of linear second adhesive portions 42 are provided in parallel to each other at the second outer corner portion 36. The number of the linear first adhesive portions 41 may be two or more than two. The number of the linear second adhesive portions 42 may be two or more than two.

[0273] [Variation 8]

[0274] Fig.30 1 is a perspective view of a modification 8 of the reinforcing member 3 in the panel assembly 100 according to the sixth embodiment. Fig.30In the eighth modification, a dot-shaped first adhesive portion 41 is provided at the first outer corner portion 35 . In addition, a dot-shaped second adhesive portion 42 is provided at the second outer corner portion 36 .

[0275] [Variation 9]

[0276] Fig.31 1 is a perspective view of a ninth modification of the reinforcing member 3 in the panel assembly 100 according to the sixth embodiment. Fig.31 In modification example 9, the plurality of first adhesive portions 41 are dot-shaped and are arranged at intervals in the X direction (first direction) of the first outer corner portion 35. In addition, the plurality of second adhesive portions 42 are dot-shaped and are arranged at intervals in the X direction of the second outer corner portion 36. In addition, the dot-shaped first adhesive portion 41 can be arranged on a straight line along the X direction, can be arranged on a plurality of straight lines, or can be arranged at any position. The dot-shaped second adhesive portion 42 can also be arranged in the same manner as the dot-shaped first adhesive portion 41.

[0277] In terms of practicality, it is preferable to arrange a plurality of first adhesive portions 41 in a dotted shape, and to arrange a plurality of second adhesive portions 42 in a dotted shape, as in Modification 9. This is because the amount of adhesive used can be suppressed. In order to be able to join the outer plate body 10 and the reinforcing member 3 in a stable state, while ensuring the bonding area and performing a sufficient bonding strength, the amount of adhesive per point of each of the first adhesive portion 41 and the second adhesive portion 42 is preferably 2 to 4 g. In this case, the size of each of the first adhesive portions 41 is preferably such that the circle equivalent diameter when viewed from above is 10 mm or more and 50 mm or less. The circle equivalent diameter refers to the diameter of a circle equivalent to the area of ​​the adhesive portion. For example, if it is a circle, the circle equivalent diameter is the diameter of the circle, if it is an ellipse, the circle equivalent diameter is the average of the major axis and the minor axis, and if it is a closed surface, the circle equivalent diameter is the average of the lengths of the long side direction and the short side direction of the closed surface. The interval between the first adhesive portions 41 in the X direction is preferably 40 mm or more and 100 mm or less. Similarly, the size of each second adhesive portion 42 is preferably such that the equivalent circle diameter in a plan view is 10 mm or more and 50 mm or less. The interval between the second adhesive portions 42 is preferably 40 mm or more and 100 mm or less.

[0278] The conditions of this embodiment are applicable not only to the reinforcing member 3 of the first embodiment but also to the reinforcing members 3 of the second to fifth embodiments.

[0279] [Seventh embodiment]

[0280] Fig.32 It is a plan view of the panel assembly 100 according to the seventh embodiment. Fig.32Equivalent to observing from the outside O along the Z direction Figure 1 The top view of the plate assembly 100 is shown. Fig.32 In the figure, the reinforcing member 3 hidden behind the outer panel body 10 is shown by a solid line. The present embodiment is a modification of the first embodiment.

[0281] Reference Fig.32 In this embodiment, two reinforcing members 3 are arranged in the X direction (first direction). The number of reinforcing members 3 may be three or more. However, as the number of reinforcing members 3 increases, the number of joints with respect to the outer panel body 10 and the inner panel body 20 increases. Therefore, from the perspective of weight reduction and manufacturing efficiency, the number of reinforcing members 3 is preferably small.

[0282] When a plurality of reinforcing members 3 are provided, the dimensions (e.g., dimensions in the width direction, dimensions in the direction perpendicular to the width direction, height) of the reinforcing members 3 may be the same or different. In addition, when a plurality of reinforcing members 3 are provided, the forms (e.g., shapes, depths, directions) of the protrusions formed on the reinforcing members 3 may be the same or different.

[0283] Even when there are a plurality of reinforcing members 3, the above formula (7) can be used. In this case, W in formula (7) can be set to the total length (total width) of the plurality of reinforcing members 3 in the X direction. In addition, in this case, it is preferred that at least one of the plurality of reinforcing members 3 is laminated with at least a portion of the length range from the position of 0.45×Q to the position of 0.55×Q in the X direction (first direction) of the outer panel body 10.

[0284] The conditions of this embodiment are applicable not only to the reinforcing member 3 of the first embodiment but also to the reinforcing members 3 of the second to sixth embodiments.

[0285] [Conditions related to numerical ranges of each embodiment]

[0286] The effects produced by the numerical ranges of the above-mentioned embodiments are effectively manifested under the following conditions. The dimensions of the outer panel body 10 are 1800 mm or less in the X direction and 1500 mm or less in the Y direction. The length is the maximum in each direction. The minimum length is 800 mm in the X direction and 300 mm in the Y direction. The maximum separation distance between the outer panel body 10 and the inner panel body 20 is 400 mm or less. The lower limit of the maximum separation distance is 50 mm.

[0287] The thickness of the outer plate component 1 is 0.3 mm or more and 1.4 mm or less. The tensile strength of the outer plate component 1 is 270 MPa or more and 780 MPa or less. The thickness of the inner plate component 2 is 0.3 mm or more and 1.4 mm or less. The tensile strength of the inner plate component 2 is 270 MPa or more and 780 MPa or less. The thickness of the reinforcing member 3 is 0.15 mm or more and 0.8 mm or less. The tensile strength of the reinforcing member 3 is 270 MPa or more and 700 MPa or less.

[0288] In the outer panel body 10, the top 10a is located within the range of ±P1×0.2 from the center position in the Y direction of the outer panel body 10. The value of S1 / P1 may be different from the value of S2 / P2. The value of T1 / P1 may be different from the value of T2 / P2.

[0289] The width of the reinforcing member 3 may be constant or may vary within a range of 40% or less. For example, in a reinforcing member 3 having a width of 100 mm, a contraction portion having a width of 60 mm may exist in the reinforcing member 3. In the case where the outer side lateral portion 30 of the reinforcing member 3 is provided with a protruding portion 30a, a hole 30b may be provided at the bottom of the protruding portion 30a.

[0290] Example 1

[0291] In order to confirm the effect of the present embodiment, CAE analysis was performed. The detailed conditions and analysis results of the CAE analysis are shown in Table 1. The CAE analysis used a commercially available general solver, namely LS-DYNA ver.971 (manufactured by ANSYS). In the CAE analysis, a model of the plate assembly 100 of the present embodiment described above was made under various conditions.

[0292] The common conditions of the panel assembly 100 are as follows.

[0293] · Length of the outer plate body 10 in the X direction when viewed from above: 400 mm

[0294] · Length of the outer plate body 10 in the Y direction when viewed from above: 400 mm

[0295] · Radius of curvature of the outer panel body 10 in a cross section perpendicular to the X direction: 1000 mm

[0296] Position of the top 10a of the outer panel body 10 in the Y direction: the center of the length of the outer panel body in the Y direction (P1 = P2 = 200)

[0297] Minimum height of the side wall of the inner plate member 2 in the Z direction: 15 mm (position of the top 10a of the outer plate body 10)

[0298] Maximum height of the side wall of the inner plate member 2 in the Z direction: 40 mm (position of the end of the outer plate body 10)

[0299] ·Integration method of inner panel component 2 and outer panel component 1: Folding process

[0300] · Material of outer plate component 1, inner plate component 2 and reinforcing member 3: steel plate, yield stress 180MPa, tensile strength 300Mpa

[0301] · Length of the first edge 11 and the second edge 12 in the Y direction (width of the folded edge): 10 mm

[0302] · Length of the third edge 13 and the fourth edge 14 in the X direction (width of the folded edge): 10 mm

[0303] The number of reinforcing members 3 is one, two or three. When there is one reinforcing member 3, the reinforcing member 3 is arranged at the center of the outer panel body 10 in the X direction. When there are two reinforcing members 3, the two reinforcing members 3 are arranged in a manner that sandwiches the center of the outer panel body 10 in the X direction. When there are three reinforcing members 3, one reinforcing member 3 is arranged in the center of the outer panel body 10 in the X direction, and the two reinforcing members 3 are arranged in a manner that sandwiches the central reinforcing member 3. When there are two or three reinforcing members 3, the interval between the reinforcing members 3 is 30 mm. In this case, at least one of the plurality of reinforcing members 3 is stacked with at least a portion of the length range from the position of 0.45×Q to the position of 0.55×Q in the X direction of the outer panel body 10.

[0304] The outer side lateral portion 30 of the reinforcing member 3 is flat or has a protrusion 30a. The height of the protrusion 30a is 10 mm, the length of the protrusion in the Y direction is 210 mm, and the length in the X direction is 0.7 times the width of the reinforcing member 3. Fig.12 , S1=S2=120mm, and T1=T2=158mm. Therefore, S1 / P1=0.60, T1 / P1=0.79, S2 / P2=0.60, and T2 / P2=0.79. The length of each of the first inner side lateral portion 33 and the second inner side lateral portion 34 in the Y direction is 16mm. In addition, the reinforcing member 3 is formed in a shape in which the first inner side lateral portion 33 and the second inner side lateral portion 34 extend to the side opposite to the side where the outer side lateral portion 30 exists. When viewed in a cross section perpendicular to the X direction, the radius of curvature of each of the first inner side corner portion 37 and the second inner side corner portion 38 is set to 6mm. When viewed in a cross section perpendicular to the X direction, the length of each of the linear portion of the first outer side corner portion 35 and the linear portion of the second outer side corner portion 36 is set to 15mm. The length (width) of the reinforcing member 3 in the X direction is set to be constant, and does not change with respect to the Y direction.

[0305] The reinforcing member 3 and the inner panel component 2 are joined by spot welding at a point at the center of the first inner side lateral portion 33 and the second inner side lateral portion 34 of the reinforcing member 3 in the X direction and the Y direction, respectively. The reinforcing member 3 and the outer panel component 1 are joined by applying adhesive to the entire first outer side corner portion 35 and the second outer side corner portion 36 of the reinforcing member 3, respectively.

[0306] The length (P1+P2) of the outer panel body 10 in the Y direction is set to 400 mm, and the length (Q) of the outer panel body 10 in the X direction is set to 400 mm.

[0307] In Comparative Example 1, the thickness of each of the outer plate member 1 and the inner plate member 2 is 0.5 mm. In Comparative Example 2, the thickness of each of the outer plate member 1 and the inner plate member 2 is 0.4 mm. In Examples 1 to 18 of the present invention, the thickness of each of the outer plate member 1 and the inner plate member 2 is 0.4 mm. In Examples 1 to 18 of the present invention, the thickness, the length W in the X direction, the number of reinforcing members 3, and the presence or absence of the protrusion 30a were changed.

[0308] The analysis was performed for each model, and the natural vibration frequency of the vibration generated by each of the outer panel member 1, the inner panel member 2, and the reinforcing member 3 was obtained. The analysis results are shown in Table 1. In Table 1, in the column "Presence or absence of protrusion", the case where "Presence" is recorded means that the protrusion 30a protrudes toward the inner panel member 2, and the case where "Presence" is recorded means that the protrusion 30a protrudes toward the outer panel member 1.

[0309] Table 1

[0310]

[0311] According to Comparative Examples 1 and 2, when the thickness of each plate of the outer plate component 1 and the inner plate component 2 is reduced, the natural vibration frequencies of the outer plate component 1 and the inner plate component 2 are reduced. Next, Examples 1 to 18 of the present invention are compared with Comparative Examples 1 and 2. Examples 1 to 18 of the present invention all add a reinforcing member 3 that satisfies the relationship of formula (7). The natural vibration frequencies of Examples 1 to 18 of the present invention are increased compared with Comparative Example 2, and are thin-walled or have a larger natural vibration frequency than Comparative Example 1. Based on the above, by adding a reinforcing member 3, the natural vibration frequency can be greatly increased. In particular, as in Example 8 of the present invention, if W / Q according to formula (7) is greater than 0.20, the natural vibration frequency is greater than that of Comparative Example 1, where the plate thickness is 0.1 mm.

[0312] The difference between Example 4 of the present invention and Example 13 of the present invention, the difference between Example 8 of the present invention and Example 14 of the present invention, and the difference between Example 11 of the present invention and Example 15 of the present invention is whether or not the protrusion 30a is provided on the reinforcing member 3. If the two are compared, the natural vibration frequencies of the inner plate member 2 are approximately the same value regardless of the presence or absence of the protrusion 30a. However, the natural vibration frequency of the outer plate member 1 in the present invention example having the protrusion 30a becomes a larger value. Therefore, in order to increase the natural vibration frequency of the outer plate member 1, it is better to provide the protrusion 30a. In addition, the natural vibration frequency of the reinforcing member 3 is a larger value when the protrusion 30a is provided. Therefore, it can be seen that in order to avoid the vibration of the reinforcing member 3 itself, it is better to apply the protrusion 30a to the reinforcing member 3.

[0313] Inventive Examples 16 to 18 have a smaller plate thickness of the reinforcing member 3 than inventive Example 4. The plate thickness of the reinforcing member 3 in inventive Example 16 is 0.10 mm, and its natural vibration frequency is greater than that in comparative example 2, but smaller than inventive Examples 17, 18, and 4. The values ​​of the natural vibration frequencies of inventive Examples 17, 18, and 4 are substantially the same, and it can be seen that the plate thickness of the reinforcing member 3 only needs to be 0.15 mm or more.

[0314] The difference between Example 4 of the present invention and Example 19 of the present invention, and the difference between Example 8 of the present invention and Example 20 of the present invention lies in the direction of the protrusion 30a of the reinforcing member 3. In Examples 19 and 20 of the present invention, the protrusion 30a protrudes toward the outer panel member 1. In Examples 4 and 8 of the present invention, the protrusion 30a protrudes toward the inner panel member 2. When comparing Example 4 of the present invention and Example 19 of the present invention, the natural vibration frequencies of the outer panel member 1, the inner panel member 2, and the reinforcing member 3 are the same. In addition, when comparing Example 8 of the present invention and Example 20 of the present invention, the natural vibration frequencies of the outer panel member 1, the inner panel member 2, and the reinforcing member 3 are the same. Therefore, regardless of the direction in which the protrusion 30a protrudes, the effect of increasing the natural vibration frequencies of the outer panel member 1, the inner panel member 2, and the reinforcing member 3 can be confirmed.

[0315] In the present invention example 5, the present invention example 21 and the present invention example 22, the width of the reinforcing member is set to 60 mm, and the plate thickness of the outer plate member 1, the inner plate member 2 and the reinforcing member 3 are changed. When comparing the present invention example 5 and the present invention example 21, the natural vibration frequency of the outer plate member 1 and the natural vibration frequency of the inner plate member 2 are higher in the present invention example 21 where the plate thickness of the outer plate member 1 and the inner plate member 2 are larger. When comparing the present invention example 21 and the present invention example 22, although the plate thickness of the outer plate member 1 and the inner plate member 2 are the same and the plate thickness of the reinforcing member 3 is different, the natural vibration frequency of the outer plate member 1 and the natural vibration frequency of the inner plate member 2 are the same. In other words, the natural vibration frequency of the outer plate member 1 and the natural vibration frequency of the inner plate member 2 are less affected by the plate thickness of the reinforcing member 3.

[0316] In Example 23 of the present invention, the natural vibration frequency of the outer plate member 1 and the natural vibration frequency of the inner plate member 2 are higher than those of Comparative Example 2. However, in Example 23 of the present invention, W / Q ≤ 0.1. Therefore, in Example 23 of the present invention, the natural vibration frequency of the outer plate member 1 and the natural vibration frequency of the inner plate member 2 are smaller than those of Example 1 of the present invention, and the effect is smaller.

[0317] Example 2

[0318] In Example 2, based on the conditions of Example 1, the lengths (S1, S2, T1, and T2) in the Y direction and the length W (width) in the X direction of the reinforcing member 3 are changed. The number of reinforcing members 3 is set to one. A protrusion 30a is formed on the outer side transverse portion 30 of the reinforcing member 3. The height of the protrusion 30a is 10 mm. The thickness of each of the outer plate member 1, the inner plate member 2, and the reinforcing member 3 is 0.4 mm. Detailed conditions and analysis results are shown in Table 2.

[0319] Table 2

[0320]

[0321] In Table 2, Inventive Examples 4 and 6 are the same as Inventive Examples 4 and 6 in Table 1. In Inventive Examples 41 to 46, the width of the reinforcing member 3 is set to 40 mm, which is the same as Inventive Example 4. In Inventive Examples 61 to 66, the width of the reinforcing member 3 is set to 100 mm, which is the same as Inventive Example 6.

[0322] The natural vibration frequencies of Examples 41 to 45 of the present invention are greater than those of Comparative Example 2, and the effect is produced. In particular, Examples 41 to 43 of the present invention satisfy the conditions of equations (1), (2), (4), and (5), while Examples 44 and 45 of the present invention do not satisfy the conditions of these equations. Therefore, with respect to the outer plate member 1 and the inner plate member 2, the natural vibration frequencies of Examples 41 to 43 of the present invention are greater than those of Examples 44 and 45 of the present invention.

[0323] The natural vibration frequencies of Examples 61 to 65 of the present invention are greater than those of Comparative Example 2, and the effect is produced. In particular, Examples 61 to 63 of the present invention satisfy the conditions of equations (1), (2), (4), and (5), while Examples 64 and 65 of the present invention do not satisfy the conditions of these equations. Therefore, with respect to the outer plate member 1 and the inner plate member 2, the natural vibration frequencies of Examples 61 to 63 of the present invention are greater than those of Examples 64 and 65 of the present invention.

[0324] In Examples 4 and 46 of the present invention, S1 and S2 are set to 120 mm, T1 of Example 4 of the present invention is set to 158 mm, and T1 of Example 46 of the present invention is set to 100 mm. Example 4 of the present invention satisfies equations (3) and (6), but Example 46 of the present invention does not. The natural vibration frequency of Example 4 of the present invention is greater than that of Example 46 of the present invention. In Examples 6 and 66 of the present invention, S1 and S2 are set to 120 mm, T1 of Example 6 of the present invention is set to 158 mm, and T1 of Example 66 of the present invention is set to 100 mm. Example 6 of the present invention satisfies equations (3) and (6), but Example 66 of the present invention does not. The natural vibration frequency of Example 6 of the present invention is greater than that of Example 66 of the present invention. Therefore, when equations (3) and (6) are satisfied, the natural vibration frequency is larger.

[0325] Example 3

[0326] In Example 3, the natural frequency raising effect of each part of the reinforcing member 3 was confirmed. Inventive Example 5 is the same as Table 1. Inventive Examples A and B are models based on Inventive Example 5, and the reinforcing member 3 of Inventive Example A is composed of an outer side transverse portion 30, a first outer side corner portion 35, and a second outer side corner portion 36. The reinforcing member 3 of Inventive Example B is composed of a first inner side transverse portion 33, a second inner side transverse portion 34, a first inner side corner portion 37, and a second inner side corner portion 38. Detailed conditions and analysis results are shown in Table 3.

[0327] Table 3

[0328]

[0329] In the example A of the present invention, since the reinforcing member 3 is composed of the outer side transverse portion 30, the first outer side corner portion 35, and the second outer side corner portion 36, the natural vibration frequency of the outer plate member 1 is increased compared with the comparative example 2, but the natural vibration frequency of the inner plate member 2 is unchanged. That is, the outer side transverse portion 30, the first outer side corner portion 35, and the second outer side corner portion 36 reinforce the outer plate member 1 and increase its natural vibration frequency. In addition, the natural vibration frequency of the outer plate member 1 of the example 5 of the present invention is higher than that of the example A of the present invention, and thus, the interaction generated by connecting the wall portions can be confirmed.

[0330] In the example B of the present invention, since the reinforcing member 3 is composed of the first inner side transverse portion 33, the second inner side transverse portion 34, the first inner side corner portion 37, and the second inner side corner portion 38, the natural vibration frequency of the outer plate member 1 does not change, but the natural vibration frequency of the inner plate member 2 increases compared with the comparative example 2. That is, the first inner side transverse portion 33, the second inner side transverse portion 34, the first inner side corner portion 37, and the second inner side corner portion 38 reinforce the inner plate member 2 and increase its natural vibration frequency. In addition, the natural vibration frequency of the inner plate member 2 of the example 5 of the present invention is higher than that of the example B of the present invention, and thus, the interaction generated by connecting the wall portions can be confirmed.

[0331] Example 4

[0332] In Example 4, the position of the reinforcing member 3 is changed based on the conditions of Example 1 described above. Detailed conditions and analysis results are shown in Table 4. In the column "Is it within the range of 0.45×Q to 0.55×Q?" in Table 4, "Yes" is set for the case where the reinforcing member is partially overlapped with the length range from the position of 0.45×Q to the position of 0.55×Q, and "No" is set for the case where it is not overlapped. Inventive Example 6 in Table 4 is a model with the same conditions as Inventive Example 6 in Table 1, and the reinforcing member 3 is arranged at the center position of the outer panel body 10 in the X direction, in other words, at the position of 0.5×Q in the X direction. In Inventive Examples 401, 402, and 403, the reinforcing member 3 is arranged at the positions of 0.4×Q, 0.3×Q, and 0.2×Q in the X direction of the outer panel body 10. Here, the position of the reinforcing member 3 in the X direction refers to the position where the center of the length (width) of the reinforcing member 3 in the X direction is located.

[0333] Table 4

[0334]

[0335] Inventive Examples 401 to 403 have increased natural vibration frequencies compared to Comparative Example 2, and have thinner walls or larger natural vibration frequencies than Comparative Example 1, and the effect of increasing natural vibration frequencies can be confirmed. When Inventive Example 6 in which the position of the reinforcing member 3 is 0.5×Q in the X direction of the outer panel body 10 is compared with Inventive Example 401 in which the position of the reinforcing member 3 is 0.4×Q in the X direction of the outer panel body 10, the natural vibration frequencies of the outer panel component 1, the inner panel component 2, and the reinforcing member 3 are almost the same.

[0336] Next, when comparing Example 401 of the present invention in which the position of the reinforcing member 3 is 0.4×Q in the X direction of the outer panel body 10, Example 402 of the present invention in which the position of the reinforcing member 3 is 0.3×Q in the X direction of the outer panel body 10, and Example 403 of the present invention in which the position of the reinforcing member 3 is 0.2×Q in the X direction of the outer panel body 10, the farther the position of the reinforcing member 3 is from the center of the X direction of the outer panel body 10, the lower the natural vibration frequencies of each of the outer panel component 1 and the inner panel component 2.

[0337] Example 5

[0338] In Example 5, the adhesive applied to the first outer corner portion 35 and the second outer corner portion 36 of the reinforcing member 3 was changed based on the conditions of Example 1. Table 5 shows the detailed conditions and analysis results.

[0339] Inventive Example 7 in Table 5 is a model with the same conditions as Inventive Example 7 in Table 1, and adhesive is applied to the entire first outer corner 35 and the second outer corner 36 of the reinforcing member 3. Inventive Examples 301 to 305 are applied in a circular shape. The adhesive of each of the first outer corner 35 and the second outer corner 36 of Inventive Examples 301 to 303 is set to a diameter of 20 mm, and the number of points applied is 1 point, 2 points, and 3 points in sequence. Inventive Examples 304 and 305 are each applied with 1 point of adhesive on the first outer corner 35 and the second outer corner 36, and the diameter is changed.

[0340] Table 5

[0341]

[0342] Inventive Examples 301 to 305 have increased natural vibration frequencies compared to Comparative Example 2, and have thinner walls or larger natural vibration frequencies than Comparative Example 1, and the effect of increasing natural vibration frequencies can be confirmed. Inventive Example 302 with 2 bonding points has increased natural vibration frequencies of the outer plate component 1, inner plate component 2, and reinforcing member 3 compared to the present invention example 301 with 1 bonding point. Inventive Example 302 with 2 bonding points and a spacing of 47 mm between adhesives in the X direction has approximately the same natural vibration frequencies of the outer plate component 1, inner plate component 2, and reinforcing member 3 compared to the present invention example 303 with 3 bonding points and a spacing of 35 mm between adhesives in the X direction. If the spacing of adhesives in the X direction is less than 40 mm, the effect of increasing natural vibration frequencies is saturated.

[0343] When the example 301 of the present invention with a diameter of 20 mm, the example 304 of the present invention with a diameter of 10 mm, and the example 305 of the present invention with a diameter of 5 mm are compared with each other, as the diameter increases, the natural vibration frequencies of the outer plate component 1, the inner plate component 2 and the reinforcing member 3 increase.

[0344] Example 6

[0345] In Example 6, the thickness of the reinforcing member 3 is changed based on the conditions of Example 4 of the present invention in Example 1 described above. Fig.33 and Fig.34 The analysis results of Example 6 are shown. Fig.33 It is a diagram showing the relationship between the plate thickness of the reinforcing member 3 and the natural frequency of the inner panel member 2 . Fig.33 The vertical axis of represents the increase in the natural frequency of the inner plate member 2 relative to the result of the comparative example 2 with different conditions of whether or not the reinforcement member 3 is provided. Fig.34 It is a diagram showing the relationship between the plate thickness of the reinforcing member 3 and the natural frequency of the outer panel member 1 . Fig.34The vertical axis of represents the amount of increase in the natural frequency of the outer panel member 1 with respect to the result of Comparative Example 2 in which the conditions of whether or not the reinforcing member 3 is provided are different.

[0346] Fig.33 The following is shown. If the thickness of the reinforcing member 3 is 0.15 mm or more, the natural frequency of the inner plate component 2 increases significantly compared to the case where the reinforcing member 3 is not provided. If the thickness of the reinforcing member 3 is 0.15 mm or more, the natural frequency of the inner plate component 2 remains substantially unchanged.

[0347] in addition, Fig.34 Even when the thickness of the reinforcing member 3 is 0.05 mm, the natural frequency of the outer panel 1 increases compared to the case where the reinforcing member 3 is not provided, but when the thickness of the reinforcing member 3 is 0.15 mm or more, the natural frequency of the outer panel 1 increases significantly.

[0348] Example 7

[0349] In Example 7, the tensile strength of the reinforcing member 3 was changed based on the conditions of Example 4 of the present invention in Example 1 described above. Fig.35 and Fig.36 The analysis results of Example 7 are shown in FIG. Fig.35 This is a diagram showing the relationship between the tensile strength of the reinforcing member 3 and the natural frequency of the inner panel member 2 . Fig.35 The vertical axis of represents the amount of increase in the natural frequency of the inner panel member 2 with respect to the result of Comparative Example 2 in which the conditions of whether or not the reinforcing member 3 is provided are different. Fig.36 It is a graph showing the relationship between the tensile strength of the reinforcing member 3 and the natural frequency of the outer panel member 1 . Fig.36 The vertical axis of represents the amount of increase in the natural frequency of the outer panel member 1 relative to the result of Comparative Example 2 in which the conditions of whether or not the reinforcing member 3 is provided are different.

[0350] according to Fig.35 , even if the tensile strength of the reinforcing member 3 increases, the natural vibration frequency of the inner plate member 2 remains substantially unchanged. Fig.36 , even if the tensile strength of the reinforcing member 3 increases, the natural vibration frequency of the outer plate member 1 remains substantially unchanged.

[0351] The embodiments of the present disclosure are described above. However, the above embodiments are merely examples for implementing the present disclosure. Therefore, the present disclosure is not limited to the above embodiments, and the above embodiments can be appropriately modified and implemented within the scope of the present disclosure.

[0352] For example, the plate assembly may also have the following structure. The reinforcing member is formed of a rod. In this case, the outer side transverse portion is formed in a frame shape. The first longitudinal portion is formed in a frame shape. The second longitudinal portion is formed in a frame shape. The first inner side transverse portion is formed in a frame shape. The second inner side transverse portion is formed in a frame shape.

[0353] The plate assembly in which the reinforcing member is made of a rod material may also have the following structure. The first inner side transverse portion extends to the side opposite to the side where the outer side transverse portion exists relative to the first longitudinal portion, and the second inner side transverse portion extends to the side opposite to the side where the outer side transverse portion exists relative to the second longitudinal portion. In this case, the first inner side transverse portion and the second inner side transverse portion extend in directions away from each other. That is, the reinforcing member has a hat-shaped cross section in a cross-sectional perspective perpendicular to the first direction.

[0354] In addition, the panel assembly may have the following structure: The reinforcing member is solid, and in this case, from the viewpoint of reducing the weight of the entire panel assembly, the material of the reinforcing member is more preferably resin.

[0355] The plate assembly may also have the following structure. The first inner side transverse portion extends to the side where the outer side transverse portion exists relative to the first longitudinal portion, and the second inner side transverse portion extends to the side where the outer side transverse portion exists relative to the second longitudinal portion. In this case, the first inner side transverse portion and the second inner side transverse portion extend in directions facing each other. That is, the reinforcing member has a C-shaped cross section in a cross-sectional view perpendicular to the first direction.

[0356] Description of Reference Numerals

[0357] 100. Plate assembly; 1. Outer plate component; 10. Outer plate body; 10a. Top; 10b. First region; 10c. Second region; 2. Inner plate component; 20. Inner plate body; 3. Reinforcing member; 30. External side transverse portion; 31. First longitudinal portion; 32. Second longitudinal portion; 33. First internal side transverse portion; 34. Second internal side transverse portion; 35. First external side corner portion; 36. Second external side corner portion; 37. First internal side corner portion; 38. Second internal side corner portion; 41. First adhesive portion; 42. Second adhesive portion.

Claims

1. A plate assembly comprising: an outer panel member extending in a first direction and in a second direction perpendicular to the first direction, the outer panel member including an outer panel body that is curved convexly outward in a cross-sectional view perpendicular to the first direction; an inner plate member disposed inside the outer plate member and integrated with the outer plate member, the inner plate member including an inner plate body opposite to the outer plate body, and forming a space between the outer plate body and the inner plate body; and a reinforcing member disposed in the space between the outer panel body and the inner panel body, In this plate assembly, The reinforcing member, when viewed along the first direction, comprises an outer side transverse portion arranged on the outer panel main body side, a first longitudinal portion, a second longitudinal portion, a first inner side transverse portion, a second inner side transverse portion, a first outer side corner portion connecting the outer side transverse portion and the first longitudinal portion, a second outer side corner portion connecting the outer side transverse portion and the second longitudinal portion, a first inner side corner portion connecting the first longitudinal portion and the first inner side transverse portion, and a second inner side corner portion connecting the second longitudinal portion and the second inner side transverse portion, The reinforcing member has a width along the first direction, The first outer corner portion is joined to the outer panel body at a first region of the outer panel body that is separated from the top portion. The second outer corner portion is joined to the outer panel body in a second region of the outer panel body, the second region being located on the side opposite to the first region with respect to the top portion, The first inner side lateral portion and the second inner side lateral portion are joined to the inner panel body.

2. The plate assembly according to claim 1, wherein: In a cross-sectional view perpendicular to the first direction, The shape of the first outer corner portion is along the shape of the first region of the outer panel body. The second outer corner portion has a shape that follows the shape of the second region of the outer panel body.

3. The plate assembly according to claim 1, wherein: The outer side transverse portion, the first longitudinal portion, the second longitudinal portion, the first inner side transverse portion, the second inner side transverse portion, the first outer side corner portion, the second outer side corner portion, the first inner side corner portion, and the second inner side corner portion are all plate-shaped.

4. The plate assembly according to claim 3, wherein: The outer side lateral portion has a flat portion from the first outer side corner portion to the second outer side corner portion in a partial region or an entire region in the width direction.

5. The plate assembly according to claim 4, wherein: The first longitudinal portion has a flat portion from the first outer corner to the first inner corner in a partial area or the entire area in the width direction. The second longitudinal portion has a flat portion from the second outer corner to the second inner corner in a partial region or the entire region in the width direction.

6. The plate assembly according to claim 3, wherein: The outer side lateral portion has a protruding portion formed thereon, the protruding portion protruding in the plate thickness direction of the outer side lateral portion and extending along the second direction.

7. The plate assembly according to claim 6, wherein: The protrusion protrudes toward the inner panel body in the plate thickness direction of the outer lateral portion.

8. The plate assembly according to claim 3, wherein: The first inner lateral portion extends to a side opposite to a side where the outer lateral portion exists with respect to the first longitudinal portion. The second inner lateral portion extends to a side opposite to a side on which the outer lateral portion exists with respect to the second longitudinal portion.

9. The plate assembly according to claim 1, wherein: The first outer corner of the reinforcing member is bonded to the first region of the outer panel body by one or more first adhesive portions. The second outer corner portion of the reinforcing member is joined to the second region of the outer panel body by one or more second adhesive portions.

10. The plate assembly according to claim 9, wherein: The plurality of first adhesive portions are each in a dot shape and are disposed at intervals in the first direction of the first outer corner portion. The plurality of second adhesive portions are each in a dot shape and are provided at intervals in the first direction at the second outer corner portion.

11. The plate assembly according to any one of claims 1 to 10, wherein: The panel assembly is a tailgate for an automobile.

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