Automotive Panel Structure

Abstract

This vehicular panel structure has: a sheet-like outer panel member; an inner member disposed facing an inner surface of the outer panel member; and a resin member which is made of a resin and which is joined to the inner surface of the outer panel member. At least a part of the inner member is embedded in the resin member.

Description

[Technical field]

[0001] The present invention relates to a panel structure for an automobile. This application claims priority based on Japanese Patent Application No. 2021-88089 filed on May 26, 2021, the contents of which are incorporated herein by reference. [Background technology]

[0002] Currently, there is a demand for technology to reduce the weight of automobiles. It is believed that if the outer panels of an automobile, such as the roof, hood, or doors, can be strengthened, sufficient strength can be maintained even if the outer panels are made thin. Therefore, in order to reduce the weight of automobiles, technology to strengthen the outer panels is being developed.

[0003] However, making the outer panel thinner brings about the problem of insufficient tensile rigidity. Tension rigidity is a characteristic that indicates how resistant an outer panel is to bending. For example, when you place your hand on the outer panel of a car, if the outer panel has high tensile rigidity, the outer panel will not bend easily.

[0004] As a countermeasure to the lack of tension rigidity, for example, Patent Document 1 describes a technology related to a reinforcement structure for an automobile body, which is formed by placing an inner panel on an outer panel via a foam layer, where the foam layer is a thermosetting resin foam with an expansion ratio of 1.03 to 1.30. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 63-258274 Summary of the Invention [Problem to be solved by the invention]

[0006] The technology of Patent Document 1 is said to be able to achieve both high tension stiffness and prevention of distortion. However, with the technology of Patent Document 1, if the adhesion with the outer panel is insufficient, the high tension stiffness cannot be fully exhibited, which is also a factor preventing weight reduction.

[0007] The present disclosure has been made in consideration of the above problems, and an object of the present disclosure is to provide an automobile panel structure that is lightweight yet capable of exhibiting excellent tensile rigidity. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention employs the following configuration. (1) One aspect of the present invention is a vehicle body having a plate-shaped outer panel member, an inner member arranged to face the inner surface of the outer panel member, a resin member made of resin and joined to the inner surface of the outer panel member, and an adhesive portion joining the outer panel member and the inner member or the resin member, wherein at least a portion of the inner member is embedded in the resin member, and the resin member is disposed between the outer panel member and the inner member. The outer panel member is made of a metal plate, and the tensile strength of the outer panel member is 440 MPa or more. This is an automotive panel structure. (2) In the automobile panel structure described in (1) above, the inner member may extend along one direction in the in-plane direction of the outer panel member. (3) In the automobile panel structure described in (2) above, the inner member may have a cross-sectional portion perpendicular to an extending direction thereof, in which the inner member is entirely embedded in the resin member. (4) In the automotive panel structure described in (2) or (3) above, the inner members may be multiple, and the multiple inner members may be arranged in parallel and spaced apart in a direction perpendicular to the one of the in-plane directions of the outer panel member. (5) In the automotive panel structure described in (1) above, the inner member may have a plate-shaped main body portion arranged opposite the inner surface of the outer panel member, and the main body portion may have a protrusion protruding toward the outer panel member and a cross-sectional portion perpendicular to the in-plane direction of the outer panel member, where the tip of the protrusion is embedded in the resin member. (6) In the automotive panel structure described in (5) above, a cross-sectional portion perpendicular to an in-plane direction of the outer panel member may be provided, in which the entire surface of the protrusion closest to the outer panel member is embedded in the resin member. (7) In the automotive panel structure described in (1) above, the inner member has a plate-shaped main body portion arranged opposite the inner surface of the outer panel member, and the main body portion has a protruding portion including a peripheral wall portion rising toward the outer panel member and a top portion that extends and bends from the edge of the peripheral wall portion facing the outer panel member and has an opening formed in the center, and has a cross-sectional portion perpendicular to the in-plane direction of the outer panel member, where at least a portion of the top portion is embedded in the resin member. (8) In the automobile panel structure described in (7) above, the outer panel member may have a cross-sectional portion perpendicular to an in-plane direction, the top of which is entirely embedded in the resin member. (9) In the automobile panel structure according to any one of the above (1) to (8), the resin member may be a thermosetting resin. (10) In the automobile panel structure according to any one of (1) to (8) above, the resin member may be made of a thermoplastic resin. (11) In the automobile panel structure described in any one of (1) to (10) above, the resin members may be multiple, and the multiple resin members may be connected to each other along an in-plane direction of the outer panel member. (12) In the automobile panel structure described in (11) above, the plurality of resin members may be connected to one another by an adhesive. (13) In the automobile panel structure described in (11) or (12) above, the plurality of resin members may be connected to one another by fitting. (14) In the automobile panel structure according to any one of (1) to (13) above, an adhesive portion that joins the outer panel member and the resin member and an adhesive portion that joins the outer panel member and the inner member may be made of the same material. 。 (15 ) Above (1)~( 14 In the automobile panel structure described in any one of claims 1 to 4, the outer panel member may have a plate thickness of 0.30 mm or more and 0.55 mm or less. ( 16 ) Above (1)~( 15 In the automotive panel structure described in any one of the above, the thickness of a portion of the resin member whose dimension perpendicular to the in-plane direction of the outer panel member is maximum may be 3 mm or more and 60 mm or less. Effect of the Invention

[0009] According to the above-described automobile panel structure, the resin member is firmly held by the inner member and joined to the inner surface of the outer panel member, so that the structure is lightweight yet exhibits excellent tensile rigidity. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view of a panel structure according to a first embodiment of the present disclosure, as viewed from the vehicle exterior side. [Diagram 2] 1 is a perspective view of a panel structure according to a first embodiment, seen from the vehicle interior side. [Diagram 3] FIG. 2 is a cross-sectional view of an inner member of the panel structure according to the first embodiment. [Figure 4] FIG. 2 is a schematic diagram showing the positional relationship between members in the panel structure according to the first embodiment. [Diagram 5] 5A is a cross-sectional view taken along the line A in FIG. 4, and FIG. 5B is a cross-sectional view taken along the line B in FIG. [Figure 6] 10 is a schematic diagram showing a positional relationship between members in a panel structure according to a first modified example of the first embodiment. FIG. [Figure 7] 7A is a cross-sectional view taken along the line C in FIG. 6, and FIG. 7B is a cross-sectional view taken along the line D in FIG. [Figure 8] FIG. 11 is a schematic diagram showing the positional relationship between members in a panel structure according to a second modified example of the first embodiment. [Figure 9] 8, (a) is a cross-sectional view taken along the line E in FIG. 8, and (b) is a cross-sectional view taken along the line F in FIG. [Figure 10] FIG. 11 is a schematic diagram showing the positional relationship between members in a panel structure according to a third modified example of the first embodiment. [Figure 11] FIG. 13 is a schematic diagram showing the positional relationship between members in a panel structure according to a fourth modified example of the first embodiment. [Figure 12] FIG. 13 is a schematic diagram showing the positional relationship between members in a panel structure according to a fifth modified example of the first embodiment. [Figure 13] FIG. 13 is a schematic diagram showing the positional relationship between members in a panel structure according to a sixth modified example of the first embodiment. [Figure 14] 14 is a cross-sectional view taken along the line G in FIG. 13. [Figure 15] FIG. 11 is an exploded perspective view showing a panel structure according to a second embodiment of the present disclosure. [Figure 16] 16 is a cross-sectional view taken along the arrow H in FIG. 15. [Figure 17] FIG. 11 is a cross-sectional view illustrating a cross-sectional structure perpendicular to the longitudinal direction of a protrusion in a panel structure according to a first modified example of the second embodiment. [Figure 18] FIG. 13 is an exploded perspective view showing a panel structure according to a second modified example of the second embodiment. [Figure 19] 19 is a cross-sectional view taken along the line I in FIG. 18. [Figure 20] FIG. 11 is a cross-sectional view of a panel structure according to a third modified example of the second embodiment. [Figure 21] 1 is a schematic diagram of an automobile for explaining an application example of a panel structure. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] First embodiment Hereinafter, an automobile panel structure 100 according to a first embodiment of the present disclosure (hereinafter simply referred to as the panel structure 100) will be described. In the present specification and drawings, components having substantially the same functional configurations may be denoted by the same reference numerals to avoid redundant description. In the drawings, the forward direction of the vehicle is indicated by an arrow Fr.

[0012] The panel structure 100 according to this embodiment is a panel structure that is applied to the roof of an automobile 1000 shown in FIG. FIG. 1 is a perspective view showing the panel structure 100 as viewed from the vehicle exterior side, and FIG. 2 is a perspective view showing the panel structure 100 as viewed from the vehicle interior side.

[0013] As shown in FIGS. 1 and 2, the panel structure 100 has an outer panel member 110, an inner member 120 disposed opposite the inner surface of the outer panel member 110, and a resin member 130 joined to the inner surface of the outer panel member 110.

[0014] (Outer panel member 110) The outer panel member 110 is a plate-shaped member having a curved surface that is convex toward the outside of the vehicle. In this disclosure, the surface facing the outside of the vehicle may be referred to as the outer surface, and the surface facing the inside of the vehicle may be referred to as the inner surface. The outer panel member 110 is formed by press-forming a metal plate such as a steel plate. From the viewpoint of dent resistance, the tensile strength of the outer panel member 110 is preferably 440 MPa or more, and more preferably 590 MPa or more.

[0015] From the viewpoint of weight reduction, the plate thickness of the outer panel member 110 is preferably 0.55 mm or less, and more preferably 0.50 mm or less. If the thickness of the outer panel member 110 is too thin, the decrease in tension stiffness becomes evident. Also, if the thickness of the outer panel member 110 is too thin, the outer panel member 110 is likely to resonate with high-frequency vibration. For this reason, for example, when the outer panel 110 is applied to the roof of an automobile, sounds such as vibration noise caused by raindrops from the sky and wind noise during driving are likely to enter the interior of the automobile, and the decrease in quietness may become evident. Therefore, in order to reliably exhibit excellent tension stiffness and quietness, the thickness of the outer panel member 110 is preferably 0.30 mm or more, and more preferably 0.35 mm or more. According to the panel structure 100 of this embodiment, the tension stiffness of the outer panel member 110 can be increased by the configuration described later. Therefore, the outer panel member 110 can exhibit excellent tension stiffness while having a thin plate thickness.

[0016] (Inner member 120) The inner member 120 is an elongated member disposed opposite the inner surface of the outer panel member 110. The inner member 120 is disposed in a manner extending along one direction in the in-plane direction of the outer panel member 110. The inner member 120 has a role of reinforcing the panel structure 100 by being attached to the outer panel member 110 in a manner such that its longitudinal direction coincides with the vehicle width direction.

[0017] Fig. 3 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the inner member 120. As shown in Fig. 3, the inner member 120 has a substantially hat-shaped cross-section including a top plate portion 121, a pair of side wall portions 123, 123 bending and extending from both ends of the top plate portion 121, and a pair of flange portions 125, 125 bending and extending outward from ends of the pair of side wall portions 123, 123 opposite the top plate portion 121. In this disclosure, the width direction of the inner member 120 means a direction parallel to the top plate portion 121 among directions perpendicular to the longitudinal direction of the inner member 120 .

[0018] The inner member 120 can be obtained, for example, by press-molding a metal plate such as a steel plate.

[0019] (Resin member 130) As shown in FIGS. 1 and 2, the pair of resin members 130, 130 are joined to the inner surface of the outer panel member 110 in a manner such that a portion of the inner member 120 is embedded therein. In this disclosure, "at least a part of the inner member is embedded in the resin member" means that at least a part of the inner member enters the resin member and is held in surface contact with the resin member.

[0020] It is preferable that the thickness of the resin member 130 at the thickest portion, where the dimension in the direction perpendicular to the in-plane direction of the outer panel member 110 is maximum, is 3 mm or more and 60 mm or less. If the thickness of the maximum thickness portion of the resin member 130 is 3 mm or more, the inner member 120 can be more firmly held. This is preferable because it can compensate for the lack of rigidity caused by the thinning of the outer panel member 110. The thickness of the maximum thickness portion of the resin member 130 is more preferably 5 mm or more. On the other hand, even if the thickness of the maximum thickness portion of the resin member 130 exceeds 60 mm, the effect is saturated. Therefore, the thickness of the maximum thickness portion of the resin member 130 is preferably 60 mm or less. From the viewpoint of weight reduction, the thickness of the maximum thickness portion of the resin member 130 is more preferably 10 mm or less.

[0021] The material of the resin member 130 may be any resin, and either a thermosetting resin or a thermoplastic resin may be used for the resin member 130. Examples of the thermosetting resin include epoxy resin, unsaturated polyester resin, and vinyl ester resin. Examples of thermoplastic resins include polyolefins (polyethylene, polypropylene, etc.) and acid-modified products thereof, polyamide resins such as nylon 6 and nylon 66, thermoplastic aromatic polyesters such as polyethylene terephthalate and polybutylene terephthalate, polycarbonate, polyethersulfone, polyphenylene ether and modified products thereof, polyarylate, polyether ketone, polyether ether ketone, polyether ketone ketone, vinyl chloride, styrene-based resins such as polystyrene, and phenoxy resins. The resin may be made of a plurality of types of resin materials.

[0022] Furthermore, when the resin material forming the resin member 130 contains a foaming agent, the efficiency of the work when attaching the resin member 130 is improved. Therefore, it is preferable that the resin material forming the resin member 130 contains a foaming agent. Examples of the foaming agent include N,N'-dinitrosopentamethylenetetramine, azodicarbonamide, 4,4'-oxybis(benzenesulfonylhydrazide), hydrogen carbonate, and sodium hydrogen carbonate. When the resin material contains a foaming agent, it is preferable to adjust the content of the foaming agent so that the foaming ratio is 5 times or more and 50 times or less. When the foaming ratio is 5 times or more, the flange portion 125 of the inner member 120 can be more reliably embedded in the resin member 130. Therefore, the effect of improving the tensile rigidity can be reliably exhibited. In addition, when the foaming ratio is 5 times or more, vibration is easily attenuated, so the effect of improving quietness can be further enhanced. The foaming ratio is more preferably 10 times or more from the viewpoint of compensating for the lack of rigidity while reducing weight. On the other hand, when the foaming ratio is 50 times or less, the density of the resin member 130 can be prevented from being excessively reduced. Therefore, the effect of improving the tensile rigidity can be reliably exhibited. In addition, when the foaming ratio is 50 times or less, the density of the resin member 130 can be prevented from being excessively reduced, so that the vibration characteristics can be improved and the effect of improving quietness can be further enhanced. The foaming ratio is more preferably 20 times or less.

[0023] Hereinafter, the positional relationship between the outer panel member 110, the inner member 120, and the resin member 130 will be described with reference to FIGS.

[0024] 4 is a schematic diagram for explaining the positional relationship between the members when the panel structure 100 is viewed from the inside of the vehicle. As shown in FIG. 4, the pair of resin members 130, 130 are arranged in the center of the inner member 120 in the longitudinal direction so as to fill a part of the inner member 120.

[0025] Fig. 5(a) is a cross-sectional view taken along the line A in Fig. 4. That is, Fig. 5(a) shows a cross-sectional portion at the longitudinal center of the inner member 120 of the panel structure 100, among cross-sectional portions perpendicular to the longitudinal direction of the inner member 120. 5(a), at the longitudinal center of the inner member 120, the widthwise ends of the pair of flange portions 125, 125 of the inner member 120 extend into the pair of resin members 130, 130 from the side surfaces of the pair of resin members 130, 130. In other words, a part of the inner member 120 is embedded in the resin members 130. Furthermore, the upper surfaces of the pair of resin members 130 , 130 are joined to the inner surface of the outer panel member 110 via adhesive parts 150 .

[0026] The adhesive portion 150 may be any adhesive. When a mastic adhesive containing synthetic rubber as a main component is used as the material for the adhesive portion 150, the tensile rigidity of the outer panel member 110 can be further increased. Furthermore, when a mastic adhesive containing synthetic rubber as a main component is used as the material for the adhesive portion 150, vibration characteristics that make it easier to attenuate high-frequency vibrations can be imparted, so that the quietness of the outer panel member 110 can be further increased. For this reason, it is preferable to use a mastic adhesive containing synthetic rubber as a main component as the material for the adhesive portion 150. The adhesive portion 150 may be provided on the entire upper surface of the resin member 130, or may be provided on only a portion of the upper surface.

[0027] When the resin material forming the resin member 130 contains a foaming agent, the resin material containing the foaming agent is sprayed onto the outer panel member 110 and / or the inner member 120, and the resin material is heated to foam, thereby forming the resin member 130. In this case, the upper surface of the resin member 130 is directly bonded to the outer panel member 110, so that the adhesive portion 150 can be omitted.

[0028] Fig. 5(b) is a cross-sectional view taken along the line B in Fig. 4. That is, Fig. 5(b) shows a cross-sectional portion of the inner member 120 at a longitudinal end of the inner member 120 in the panel structure 100, among cross-sectional portions perpendicular to the longitudinal direction of the inner member 120. As shown in (b) of Figure 5, a pair of resin members 130, 130 are not arranged on the longitudinal end side of the inner member 120, and a pair of flange portions 125, 125 of the inner member 120 are joined to the outer panel member 110 via adhesive portions 160.

[0029] The adhesive portion 160 may be any adhesive. When a mastic adhesive containing synthetic rubber as a main component is used as the material for the adhesive portion 160, the tensile rigidity of the outer panel member 110 can be further increased. Furthermore, when a mastic adhesive containing synthetic rubber as a main component is used as the material for the adhesive portion 160, vibration characteristics that make it easier to attenuate high-frequency vibrations can be imparted, so that the quietness of the outer panel member 110 can be further increased. For this reason, it is preferable to use a mastic adhesive containing synthetic rubber as a main component as the material for the adhesive portion 160. The adhesive parts 160 are provided only on the longitudinal end sides of the inner member 120, but may also be provided in the longitudinal center portion. When the adhesive parts 160 are provided in the longitudinal center portion of the inner member 120, the adhesive parts 160 may be provided continuously along the longitudinal direction of the inner member 120, or may be provided intermittently at a predetermined pitch along the longitudinal direction of the inner member 120.

[0030] It is preferable that the adhesive portion 150 joining the outer panel member 110 and the resin member 130 and the adhesive portion 160 joining the outer panel member 110 and the inner member 120 are made of the same material, from the viewpoint of improving work efficiency when attaching the inner member 120 and the resin member 130 to the outer panel member 110.

[0031] The panel structure 100 can be obtained by: Pattern A, in which the resin component is formed and then assembled; Pattern B, in which the assembly is performed before the resin component is formed; The details will be described below.

[0032] (Pattern A) In the first step A11, a molding die is placed so as to surround a predetermined portion of the inner member 120, and a resin material is injected into the molding die and hardened, thereby integrating the inner member 120 and the pair of resin members 130, 130. In the second step A12, the integrated inner member 120 and the pair of resin members 130, 130 are attached to the outer panel member 110 with an adhesive or the like.

[0033] The resin material used in the first step A11 may be either a thermoplastic resin or a thermosetting resin, and may contain a foaming agent. In the first step A11, a resin material may first be injected into a molding die and allowed to harden to form an intermediate product of a pair of resin members 130, 130, and then slits may be formed in each intermediate product. The flange portion 125 of the inner member 120 may then be inserted into the slits to integrate the intermediate products.

[0034] (Pattern B) In the first step B11, a resin material containing a foaming agent is spray-coated onto the outer panel member 110 and / or the inner member 120. In the second step B12, the pair of flange portions 125, 125 of the inner member 120 are attached to the outer panel member 110 with an adhesive or the like. In the third step B13, the resin material is foamed to form the resin member 130 in which the pair of flange portions 125, 125 of the inner member 120 are filled.

[0035] The resin material sprayed in the first step B11 is a thermosetting resin. The order of the first step B11 and the second step B12 may be reversed. In the third step B13, it is preferable to adjust the content of the foaming agent so that the foaming ratio is 5 times or more and 50 times or less. When the foaming ratio is 5 times or more, the flange portion 125 of the inner member 120 can be more reliably embedded in the resin member 130, so that the effect of improving the tensile rigidity can be reliably achieved. In addition, when the foaming ratio is 5 times or more, vibration is more easily attenuated, so that the effect of improving the quietness can be further enhanced. On the other hand, when the foaming ratio is 50 times or less, the density of the resin member 130 can be prevented from being excessively reduced. Therefore, the effect of improving the tensile rigidity can be reliably achieved. In addition, when the foaming ratio is 50 times or less, the density of the resin member 130 can be prevented from being excessively reduced, so that the vibration characteristics can be improved and the effect of improving the quietness can be further enhanced. In the third step B13, the resin material may be foamed by utilizing the heat generated during the electrodeposition coating.

[0036] According to the above-described panel structure 100, a portion of the inner member 120 is embedded in the pair of resin members 130, 130. Therefore, the pair of resin members 130, 130 are joined to the inner surface of the outer panel member 110 in a state in which they are firmly held by the inner member 120. Therefore, the tensile rigidity of the outer panel member 110 can be improved compared to the case where the resin member 130 is simply disposed only between the outer panel member 110 and the inner member 120. Since the tensile rigidity can be improved in this manner, it is possible to prevent a decrease in the tensile rigidity that becomes apparent when the outer panel member 110 is made thinner and lighter. Therefore, the above panel structure 100 is lightweight yet exhibits excellent tensile rigidity.

[0037] Furthermore, as mentioned above, with conventional automobile roof outer panels, as the outer panel becomes thinner, sounds such as vibration noise caused by raindrops from above and wind noise while driving can easily enter the interior of the vehicle, resulting in a lack of quietness. However, according to the above roof panel structure 100, a portion of the inner member 120 is embedded in the pair of resin members 130, 130. Therefore, the pair of resin members 130, 130 are joined to the inner surface of the outer panel member 110 while being firmly held by the inner member 120. This makes it possible to improve the vibration characteristics so that high-frequency vibrations are more easily attenuated, compared to a case in which the resin members 130 are simply disposed only between the outer panel member 110 and the inner member 120, thereby improving the vibration characteristics of the outer panel member 110 and enhancing quietness. In this way, the quietness can be improved, and therefore the decrease in quietness that becomes evident when the outer panel member 110 is made thinner and lighter can be prevented. Therefore, the roof panel structure 100 described above is lightweight yet provides excellent quietness.

[0038] The following describes modified examples of the panel structure 100 described in the first embodiment. The same reference numerals are used for components that are substantially the same as those in the panel structure 100, and descriptions thereof will be omitted.

[0039] (First Modification) The panel structure 100 according to the first embodiment described above has a configuration including a pair of resin members 130. However, the panel structure 100A according to the first modified example has a configuration including a single resin member 130A. Fig. 6 is a schematic diagram for explaining the positional relationship between members of the panel structure 100A according to the first modification when viewed from the vehicle interior side. Fig. 7(a) is a cross-sectional view taken along the line C in Fig. 6, and Fig. 7(b) is a cross-sectional view taken along the line D in Fig. 6. In this panel structure 100A, a pair of flange portions 125, 125 of the inner member 120 and a portion of a pair of side wall portions 123 are filled with a single resin member 130A. According to this panel structure 100A, a wider portion of the inner member 120 can be held by the resin member 130A. Furthermore, since the resin member 130A is also present in the region between the pair of flange portions 125, 125, a wider portion of the outer panel member 110 can be joined to the resin member 130A. This can further increase the tensile rigidity of the outer panel member 110. In addition, the vibration characteristics of the outer panel member 110 can be improved, and quietness can be further increased. The single resin member 130A may be formed by connecting a plurality of divided resin members.

[0040] (Second Modification) Furthermore, like the panel structure 100B according to the second modified example, the inner member 120 may have a cross-sectional portion entirely filled with a single resin member 130B. Fig. 8 is a schematic diagram for explaining the positional relationship between members of the panel structure 100B according to the second modification when viewed from the vehicle interior side. Fig. 9(a) is a cross-sectional view taken along the line E in Fig. 8, and Fig. 9(b) is a cross-sectional view taken along the line F in Fig. 8. In this panel structure 100B, as shown in (a) of Figure 9, in the cross-sectional portion at the longitudinal center of the inner member 120, the entire inner member 120 (i.e., the top plate portion 121, the pair of side wall portions 123, 123, and the pair of flange portions 125, 125) are filled with a single resin member 130B. According to this panel structure 100B, the inner member 120 has a cross-sectional portion in which the entirety is embedded in a single resin member 130B, so that a wider portion of the inner member 120 can be held by the resin member 130B. Furthermore, since the resin member 130B is also present in the region between the pair of flange portions 125, 125, a wider portion of the outer panel member 110 can be joined to the resin member 130B. This can further increase the tensile rigidity of the outer panel member 110. In addition, the vibration characteristics of the outer panel member 110 can be improved, and quietness can be further increased. The single resin member 130B may be formed by connecting a plurality of divided resin members.

[0041] The method for obtaining the panel structure 100A according to the first modification or the panel structure 100B according to the second modification can be similar to the method for obtaining the panel structure 100. Pattern A, in which the resin component is formed and then assembled; Pattern B, in which the assembly is performed before the resin component is formed; Either of the above may be adopted.

[0042] In addition, in the case where the order of the first step B11 and the second step B12 is reversed in pattern B (i.e., where the resin material containing a foaming agent is spray-applied after the inner member 120 is attached to the outer panel member 110 with an adhesive or the like), the spray application can be performed from the gap between the flange portion 125 and the outer panel member 110. However, if the gap is narrow, a hole for spray application may be formed in the top plate portion 121 or the side wall portion 123 of the inner member 120.

[0043] (Third Modification) The panel structure 100 according to the first embodiment described above has a configuration including a single inner member 120, but may have a configuration including a plurality of inner members 120. FIG. 10 is a schematic diagram for explaining the positional relationship between members of a panel structure 100C according to a third modified example, as viewed from the vehicle interior side. In this panel structure 100C, the first inner member 120C1 and the second inner member 120C2 are arranged in a manner such that they are spaced apart in the front-rear direction of the vehicle. More specifically, the first inner member 120C1 and the second inner member 120C2 are arranged in a manner such that the longitudinal direction of the first inner member 120C1 and the longitudinal direction of the second inner member 120C2 are parallel to each other. The first inner member 120C1 and the second inner member 120C2 are provided with a pair of first resin members 130C1, 130C1 and a pair of second resin members 130C2, 130C2 that fill the pair of flange portions 125, 125, respectively. The first inner member 120C1 and the second inner member 120C2 have the same configuration as the inner member 120, and the first resin member 130C1 and the second resin member 130C2 have the same configuration as the resin member 130, so that the description will be omitted. According to the panel structure 100C of the third modified example, it is possible to increase the tensile rigidity of a desired portion even when the dimensions of the outer panel member 110 are large. Also, according to the roof panel structure 100C of the third modified example, it is possible to improve vibration characteristics and increase quietness even when the dimensions of the outer panel member 110 are large. Depending on the shape and dimensions of the outer panel member 110, three or more inner members 120 may be provided, and a plurality of inner members 120 may be provided with their longitudinal directions intersecting each other. 10, the first resin member 130C1 and the second resin member 130C2 are disposed apart from each other in the center in the front-rear direction of the vehicle, but may be integrated with each other. That is, at least a portion of each of a pair of inner members 120 adjacent to each other in the front-rear direction of the vehicle may be embedded in a single (common) resin member 130.

[0044] (Fourth Modification) In the panel structure 100 of the above-described first embodiment, each of the pair of resin members 130, 130 is composed of a single member, but each resin member 130 may be composed of multiple divided members connected along the in-plane direction of the outer panel member 110. 11 is a schematic diagram for explaining the positional relationship between members of a panel structure 100D according to a fourth modified example when viewed from the vehicle interior side. This panel structure 100D has a first resin member 130D1 and a second resin member 130D2 that are divided into two in the longitudinal direction (vehicle width direction) of the inner member 120 in the in-plane direction of the outer panel member 110. The first resin member 130D1 and the second resin member 130D2 are connected by bonding an end face 131D1 of the first resin member 130D1 and an end face 131D2 of the second resin member 130D2 with an adhesive. The first resin member 130D1 and the second resin member 130D2 have the same configuration as the resin member 130, and therefore the description thereof will be omitted. According to the panel structure 100D of the fourth modified example, it is possible to increase the tensile rigidity of a desired portion even when the dimensions of the outer panel member 110 are large. Also, according to the roof panel structure 100D of the fourth modified example, it is possible to improve vibration characteristics and increase quietness even when the dimensions of the outer panel member 110 are large.

[0045] 12 is a schematic diagram for explaining the positional relationship between members of a panel structure 100E according to a fifth modified example when viewed from the vehicle interior side. This panel structure 100E has a first resin member 130E1 and a second resin member 130E2 that are divided into two in the longitudinal direction (vehicle width direction) of the inner member 120 in the in-plane direction of the outer panel member 110. The first resin member 130E1 and the second resin member 130E2 are connected to each other by fitting an end surface 131E1 of the first resin member 130E1 and an end surface 131E2 of the second resin member 130E2 to each other. Specifically, the first resin member 130E1 and the second resin member 130E2 have mutually opposing end faces 131E1 and 131E2 each having alternating convex portions and concave portions, and the first resin member 130E1 and the second resin member 130E2 are connected by the convex portions and concave portions of the end face 131E1 engaging with the concave portions and convex portions of the end face 131E2. The first resin member 130E1 and the second resin member 130E2 have the same configuration as the resin member 130, and therefore a duplicated description will be omitted. According to the panel structure 100D of the fifth modification, the tensile stiffness of a desired portion can be increased even when the outer panel member 110 has a large dimension. Also, according to the roof panel structure 100D of the fifth modification, the vibration characteristics can be improved and the quietness can be increased even when the outer panel member 110 has a large dimension. Also, in the panel structure 100D of the fifth modification, it is not necessary to bond the end faces with an adhesive as in the panel structure 100 of the fourth modification, so that the workability during installation is improved. However, if the mating portion between the convex portion and the concave portion is bonded with an adhesive, the first resin member 130E1 and the second resin member 130E2 can be more reliably prevented from falling off. Therefore, it is preferable to bond the mating portion between the convex portion and the concave portion with an adhesive.

[0046] (Sixth Modification) Fig. 13 is a schematic diagram showing the positional relationship between members in a panel structure 100F according to a sixth modified example. Fig. 14 is a cross-sectional view taken along the line G in Fig. 13 . In this panel structure 100F, a pair of side frames 170, 170 are provided in the vicinity of the vehicle width direction edges of the outer panel member 110 so as to extend in the front-rear direction of the vehicle. The side frame 170 may be, for example, a hollow, elongated member made of a metal plate such as a steel plate. In this panel structure 100F, the inner member 120 has both longitudinal ends fixed to a pair of side frames 170, 170 by welding or the like. Furthermore, both ends in the longitudinal direction of the inner member 120 are embedded in a resin member 130F as shown in FIG. According to this embodiment, the pair of resin members 130F, 130F are joined to the inner surface of the outer panel member 110 in a state in which both ends thereof are firmly held by the inner member 120 fixed to the pair of side frames 170, 170. Therefore, the vibration characteristics of the outer panel member 110 can be improved, and quietness can be further enhanced.

[0047] (Other variations) In addition to the above, various other modifications can be adopted. For example, although a member having a hat-shaped cross section is used as the inner member 120, the inner member 120 may be a member having a U-shaped cross section or a member having a T-shaped cross section. Moreover, although the resin member 130 is configured to be provided only on a portion of the inner member 120 in the longitudinal direction, the resin member 130 may be configured to be provided over the entire longitudinal length of the inner member 120. For example, by spraying a resin material over the entire inner member 120, the resin member 130 can be provided in a manner that completely surrounds and fills the inner member 120.

[0048] Second Embodiment Hereinafter, an automobile panel structure 200 according to a second embodiment of the present disclosure (hereinafter simply referred to as the panel structure 200) will be described.

[0049] The panel structure 200 according to this embodiment is a panel structure applied to the hood of an automobile 1000 shown in FIG. FIG. 15 is an exploded perspective view of the panel structure 200.

[0050] As shown in FIG. 15, the panel structure 200 has an outer panel member 210, an inner member 220 disposed opposite the inner surface of the outer panel member 210, and a resin member 230 joined to the inner surface of the outer panel member 210.

[0051] (Outer panel member 210) The outer panel member 210 is a plate-shaped member having a curved surface that is convex toward the outside of the vehicle. In this disclosure, the surface facing the outside of the vehicle may be referred to as the outer surface, and the surface facing the inside of the vehicle may be referred to as the inner surface. The outer panel member 210 is formed by press-forming a metal plate such as a steel plate. From the viewpoint of dent resistance, the tensile strength of the outer panel member 210 is preferably 440 MPa or more, and more preferably 590 MPa or more.

[0052] From the viewpoint of weight reduction, the plate thickness of the outer panel member 210 is preferably 0.55 mm or less, and more preferably 0.50 mm or less. If the plate thickness of the outer panel member 210 is excessively thin, a decrease in tensile rigidity becomes apparent. Therefore, in order to reliably exert excellent tensile rigidity, the plate thickness of the outer panel member 210 is preferably 0.30 mm or more, and more preferably 0.35 mm or more. According to the panel structure 200 of this embodiment, the tensile rigidity of the outer panel member 210 can be increased by a configuration described below. Therefore, excellent tensile rigidity can be exerted even when the plate thickness of the outer panel member 210 is thin.

[0053] (Inner member 220) The inner member 220 is configured with a plate-shaped main body portion 221 disposed opposite the inner surface of the outer panel member 210 . The main body portion 221 has a protruding portion 221a that protrudes toward the outer panel member 210 at the center in the in-plane direction. In this panel structure 200, the protruding portion 221a is formed on the inner member 220 in such a manner that its longitudinal direction coincides with the vehicle width direction, and thus has the role of reinforcing the panel structure 200.

[0054] The protruding portion 221a may be formed on the inner member 220 in such a manner that its longitudinal direction intersects with the vehicle width direction when viewed from a direction perpendicular to the in-plane direction of the outer panel member 210. The protruding portion 221a may be circular, elliptical, or polygonal when viewed from a direction perpendicular to the in-plane direction of the outer panel member 210.

[0055] The inner member 220 can be obtained, for example, by press-molding a metal plate such as a steel plate.

[0056] (Resin member 230) 15, the resin member 230 has a bottom surface 231 facing the main body portion 221 of the inner member 220. A groove 231a having a shape corresponding to the protruding portion 221a is formed in the bottom surface 231. The resin member 230 is joined to the inner surface of the outer panel member 210 in a manner that fills in the tip of the protruding portion 221a on the outer panel member 210 side.

[0057] It is preferable that the thickness of the resin member 230 at the thickest portion, where the dimension in the direction perpendicular to the in-plane direction of the outer panel member 210 is maximum, is 3 mm or more and 60 mm or less. If the thickness of the maximum thickness portion of the resin member 230 is 3 mm or more, it is possible to more firmly hold the inner member 220. This makes it possible to compensate for the lack of rigidity caused by the thinning of the outer panel member 210, so it is preferable that the thickness of the maximum thickness portion of the resin member 230 is 3 mm or more. On the other hand, since the effect is saturated even if the thickness of the maximum thickness portion of the resin member 230 exceeds 60 mm, it is preferable that the thickness of the maximum thickness portion of the resin member 230 is 60 mm or less.

[0058] The material of the resin member 230 may be any resin, and either a thermosetting resin or a thermoplastic resin may be used for the material of the resin member 230. Examples of the thermosetting resin include epoxy resin, unsaturated polyester resin, and vinyl ester resin. Examples of thermoplastic resins include polyolefins (polyethylene, polypropylene, etc.) and acid-modified products thereof, polyamide resins such as nylon 6 and nylon 66, thermoplastic aromatic polyesters such as polyethylene terephthalate and polybutylene terephthalate, polycarbonate, polyethersulfone, polyphenylene ether and modified products thereof, polyarylate, polyether ketone, polyether ether ketone, polyether ketone ketone, vinyl chloride, styrene-based resins such as polystyrene, and phenoxy resins. The resin may be made of a plurality of types of resin materials.

[0059] Furthermore, when the resin material forming the resin member 230 contains a foaming agent, the efficiency of the work when attaching the resin member 230 is improved. Therefore, it is preferable that the resin material forming the resin member 230 contains a foaming agent. Examples of the foaming agent include N,N'-dinitrosopentamethylenetetramine, azodicarbonamide, 4,4'-oxybis(benzenesulfonylhydrazide), hydrogen carbonate, and sodium hydrogen carbonate. When a foaming agent is contained in the resin material, it is preferable to adjust the content of the foaming agent so that the expansion ratio is 5 times or more and 50 times or less.

[0060] Fig. 16 is a cross-sectional view taken along the line H in Fig. 15. That is, Fig. 16 shows a cross-sectional portion of the panel structure 200 at the center in the longitudinal direction of the protruding portion 221a, among cross-sectional portions perpendicular to the longitudinal direction of the protruding portion 221a. 16, at the longitudinal center of the protruding portion 221a of the inner member 220, the tip of the protruding portion 221a of the inner member 220 on the outer panel member 210 side fits into a groove 231a of the resin member 230. In other words, a part of the inner member 220 is embedded in the resin member 230. Furthermore, the upper surface of the resin member 230 is joined to the inner surface of the outer panel member 210 via an adhesive portion 250 .

[0061] The adhesive portion 250 may be any adhesive. When a mastic adhesive containing synthetic rubber as a main component is used as the material for the adhesive portion 250, the tensile rigidity of the outer panel member 210 can be further increased. For this reason, it is preferable to use a mastic adhesive containing synthetic rubber as a main component as the material for the adhesive portion 250. The adhesive portion 250 may be provided on the entire upper surface of the resin member 230, or may be provided on only a portion of the upper surface.

[0062] When the resin material forming the resin member 230 contains a foaming agent, the resin material containing the foaming agent is sprayed onto the outer panel member 210 and / or the inner member 220, and the resin material is heated to foam, thereby forming the resin member 230. In this case, the upper surface of the resin member 230 is directly bonded to the outer panel member 210, so that the adhesive part 250 can be omitted.

[0063] The panel structure 200 can be obtained by: Pattern A, in which the resin component is formed and then assembled; Pattern B, in which the assembly is performed before the resin component is formed; The details will be described below.

[0064] (Pattern A) In the first step A21, a molding die is placed so as to surround a predetermined portion of the protruding portion 221a of the inner member 220, and a resin material is injected into the molding die and hardened, thereby integrating the inner member 220 and the resin member 230. In the second step A22, the integrated inner member 220 and resin member 230 are attached to the outer panel member 210 with an adhesive or the like.

[0065] The resin material used in the first step A21 may be either a thermoplastic resin or a thermosetting resin, and may contain a foaming agent. In the first step A21, the resin member 230 previously prepared in a molding die may be bonded to the inner member 220 with an adhesive or the like, thereby integrating the resin material 230 and the inner member 220 together.

[0066] (Pattern B) In the first step B21, a resin material containing a foaming agent is spray-coated onto the outer panel member 210 and / or the inner member 220. In the second step B22, the inner member 220 is attached to the outer panel member 210 with an adhesive or the like. In the third step B23, the resin material is foamed to form the resin member 230 in which the tip of the protruding portion 221a of the inner member 220 is filled.

[0067] The resin material sprayed in the first step B21 is a thermosetting resin. The order of the first step B21 and the second step B22 may be reversed, provided that some ingenuity is required, such as forming holes in the inner member 220 for spray application. In the third step B23, it is preferable to heat so that the expansion ratio is 5 times or more and 50 times or less. When the expansion ratio is 5 times or more, the protruding portion 221a of the inner member 220 can be more reliably embedded in the resin member 230, so that the effect of improving the tensile rigidity can be reliably achieved. From the viewpoint of making up for the lack of rigidity while reducing the weight, the expansion ratio is more preferably 10 times or more. On the other hand, when the expansion ratio is 50 times or less, it is possible to prevent the density of the resin member 230 from being excessively reduced, so that the effect of improving the tensile rigidity can be reliably achieved. The expansion ratio is more preferably 20 times or less. In the third step B23, foaming may be performed by utilizing heat during electrodeposition coating.

[0068] According to the above-described panel structure 200, the tip of the protruding portion 221a of the inner member 220 is embedded in the resin member 230. Therefore, the resin member 230 is joined to the inner surface of the outer panel member 210 in a state where it is firmly held by the inner member 220. Therefore, the tensile rigidity of the outer panel member 210 can be improved compared to the case where the resin member 230 is simply disposed only between the outer panel member 210 and the inner member 220. Since the tensile rigidity can be improved in this manner, it is possible to prevent a decrease in the tensile rigidity that becomes apparent when the outer panel member 210 is made thinner and lighter. Therefore, the above panel structure 200 can exhibit excellent tensile rigidity while being lightweight.

[0069] The following describes modified examples of the panel structure 200 described in the second embodiment. The same reference numerals are used for components that are substantially the same as those in the panel structure 200, and descriptions thereof will be omitted.

[0070] (First Modification) The panel structure 200 of the second embodiment was configured to have a cross-sectional portion in which the tip of the protruding portion 221a of the inner member 220 is embedded in the resin member 230, but it may also be configured to have a cross-sectional portion in which the entire surface of the protruding portion 221a facing the outer panel member 210 is embedded in the resin member 230. Fig. 17 shows a cross section at the center of the protruding portion 221a in the longitudinal direction of the panel structure 200A according to the first modified example of the second embodiment, among cross sections perpendicular to the longitudinal direction of the protruding portion 221a. As shown in Fig. 17, the panel structure 200A is configured such that the bottom surface 231A of the resin member 230A is in surface contact with the main body portion 221 of the inner member 220 (i.e., a portion other than the protruding portion 221a). With this configuration, the panel structure 200A has a cross section in which the entire surface of the protruding portion 221a of the inner member 220 on the outer panel member 210 side is filled with the resin member 230A. According to this configuration, the resin member 230A is joined to the outer panel member 210 in a state in which the resin member 230A is held more firmly by the inner member 220, so that the tensile rigidity of the outer panel member 210 can be further improved.

[0071] (Second Modification) The panel structure 200 of the second embodiment is configured such that the protrusion 221a formed on the inner member 220 has a cross-sectional portion embedded in the resin member 230, but the panel structure 200 may also be configured such that the vicinity of the opening penetrating the inner member 220 has a cross-sectional portion embedded in the resin member 230. FIG. 18 is an exploded perspective view of a panel structure 200B according to a second modified example of the second embodiment. As shown in FIG. 18, in the panel structure 200B, an inner member 220B is configured with a plate-shaped main body 221B arranged to face the inner surface of the outer panel member 210. The main body 221B has a plurality of overhanging portions 221b and a bottom portion 221c continuous with the overhanging portions 221b at the center in the in-plane direction. The overhanging portions 221b are formed in a manner that they rise toward the outer panel member 210. The bottom portion 221c is arranged continuous with the overhanging portions 221b on the inner member 220B side. A plurality of such overhanging portions 221b and bottom portions 221c are provided so as to be aligned in the in-plane direction of the main body 221B.

[0072] Fig. 19 is a cross-sectional view taken along the line I in Fig. 18. That is, Fig. 19 is a cross-sectional view including the protruding portion 221b and the bottom portion 221c among cross-sectional portions perpendicular to one direction (the vehicle forward direction Fr) in the in-plane direction of the outer panel member 210 in the panel structure 200B.

[0073] As shown in FIG. 19, the protruding portion 221b has a peripheral wall portion 221b1 and a top portion 221b2. The peripheral wall portion 221b1 is a portion formed in a manner rising from the main body portion 221B toward the outer panel member 210. The peripheral wall portion 221b1 is disposed between the top portion 221b2 and the bottom portion 221c, and connects the top portion 221b2 and the bottom portion 221c. As shown in Fig. 18, the peripheral wall portion 221b1 has a substantially hexagonal outer shape, but may be polygonal, circular, or elliptical. The apex 221b2 is a portion of the overhanging portion 221b that bends and extends from the edge on the outer panel member 210 side. The upper surface of the apex 221b2 is joined to the inner surface of the outer panel member 210 via an adhesive portion 250B.

[0074] The top portion 221b2 has a substantially hexagonal opening formed at its center, penetrating in a direction perpendicular to the in-plane direction of the outer panel member 210. The opening may be polygonal, circular, or elliptical. In this way, when the protruding portion 221b has the peripheral wall portion 221b1 and the top portion 221b2, the opening can reduce the weight of the inner member 220B, while the three-dimensionally formed peripheral wall portion 221b1 can compensate for the reduced rigidity caused by the opening.

[0075] As shown in Fig. 19, the bottom 221c is continuous with the peripheral wall 221b1 and is spaced apart from the top 221b2. In other words, the bottom 221c is continuous with the peripheral wall 221b1 on the side opposite the top 221b2. Also, the bottom 221c has a substantially hexagonal outer shape as shown in Fig. 18, but may be polygonal, circular, or elliptical. As shown in FIG. 19, the bottom portion 221c continuous with one apex portion 221b2 is butted against the bottom portion 221c continuous with the other apex portion 221b2.

[0076] As shown in FIG. 19, this panel structure 200B has a cross-sectional portion in which a portion of the top portion 221b2 is embedded in the resin member 230B.

[0077] According to this structure, not only can the overall weight of the panel structure 200B be reduced, but also the tensile rigidity can be further increased by embedding a portion of the peripheral wall portion 221b1 in the resin member 230B.

[0078] The adhesive portion 250B may be any adhesive. When a mastic adhesive containing synthetic rubber as a main component is used as the material for the adhesive portion 250B, the tensile rigidity of the outer panel member 210 can be further increased. For this reason, it is preferable to use a mastic adhesive containing synthetic rubber as a main component as the material for the adhesive portion 250B. The adhesive portion 250B may be provided continuously in an annular shape along the upper surface of the top portion 221b2, or may be provided in an annular shape at a predetermined pitch.

[0079] (Third Modification) Furthermore, a configuration may be adopted in which the top portion 221b2 has a cross-sectional portion entirely embedded in the resin member 230C, as in the panel structure 200C according to a third modified example shown in Fig. 20. This structure can further increase the tensile rigidity compared to the panel structure 200B according to the second modified example.

[0080] (Other variations) In addition to the above, various other modifications can be adopted. For example, in the panel structure 200B according to the second modified example and the panel structure 200C according to the third modified example, a plurality of overhanging portions 221b are formed, but it is sufficient that at least one overhanging portion 221b is formed.

[0081] Although the panel structure of the present disclosure has been described above based on the first embodiment, the second embodiment, and their respective modified examples, the panel structure of the present disclosure is not limited thereto. For example, the roof panel structure 100 can also be applied to panel structures such as a hood, a side door, and a back door. For example, when the panel structure 100 is applied to a hood, the inner member 120 may be attached to the outer panel member 110 in a manner in which the longitudinal direction of the inner member 120 coincides with the longitudinal direction of the vehicle. This allows the panel structure 100 to be reinforced. The inner member 120 may be one or more. When the multiple inner members 120 are arranged in a manner in which the longitudinal directions of the inner members 120 coincide with the longitudinal direction of the vehicle, the inner members 120 may have different shapes or the same shape. In addition, the inner members 120 may have different lengths or the same length. Furthermore, the arrangement of the inner members 120 is not particularly limited. The inner members 120 may be arranged, for example, at equal intervals in the vehicle width direction, or at different intervals. In addition, the inner members 120 may be arranged, for example, shifted in the longitudinal direction of the vehicle. Moreover, the inner members 120 may be arranged side by side in the vehicle front-rear direction at equal positions in the vehicle width direction. Furthermore, the inner member 120 may have an opening extending in the longitudinal direction thereof. When the inner member 120 is attached to the outer panel member 110 in such a manner that the longitudinal direction thereof coincides with the front-rear direction of the vehicle, the opening extending in the longitudinal direction of the inner member 120 extends in the front-rear direction of the vehicle. In addition, the hood panel structure 200 can also be applied to panel structures for roofs, side doors, back doors, etc. Moreover, the modified examples described in the first and second embodiments may be applied to the panel structures according to the other embodiments. [Explanation of symbols]

[0082] 100 Automotive Panel Structure 110 Outer panel member 120 Inner member 130 Resin parts 150 Adhesive part 160 Adhesive part 170 Side Frame 200 Automotive Panel Structure 210 Outer panel member 220 Inner member 221 Main body 221a Protrusion 221b Peripheral wall section 221c bottom 230 Resin parts 250 Adhesive part 1000 Cars

Claims

1. A plate-shaped outer panel member; an inner member disposed opposite an inner surface of the outer panel member; a resin member made of a resin and joined to the inner surface of the outer panel member; an adhesive portion that joins the outer panel member and the inner member or the resin member; having At least a portion of the inner member is embedded in the resin member, The resin member is disposed between the outer panel member and the inner member, The outer panel member is made of a metal plate, and the tensile strength of the outer panel member is 440 MPa or more.

1. An automobile panel structure comprising:

2. 2. The automobile panel structure according to claim 1, wherein the inner member extends along one direction in the in-plane direction of the outer panel member.

3. The inner member has a cross-sectional portion perpendicular to a direction in which the inner member extends, the cross-sectional portion being entirely embedded in the resin member.

3. The automobile panel structure according to claim 2.

4. The inner member includes a plurality of inner members, The inner members are arranged in parallel to each other and spaced apart from each other in a direction perpendicular to the one direction among the in-plane directions of the outer panel member.

4. The automobile panel structure according to claim 2 or 3.

5. the inner member has a plate-shaped main body portion disposed opposite the inner surface of the outer panel member, the main body portion has a protruding portion protruding toward the outer panel member, a cross-sectional portion perpendicular to an in-plane direction of the outer panel member, the cross-sectional portion having a tip of the protruding portion embedded in the resin member; 2. The automobile panel structure according to claim 1.

6. a cross-sectional portion perpendicular to an in-plane direction of the outer panel member, the cross-sectional portion being such that the entire surface of the protruding portion close to the outer panel member is embedded in the resin member; 6. The automobile panel structure according to claim 5.

7. the inner member has a plate-shaped main body portion disposed opposite the inner surface of the outer panel member, the main body portion has a peripheral wall portion rising toward the outer panel member, and a protruding portion including a top portion that is bent and extends from an edge of the peripheral wall portion on the outer panel member side and has an opening formed in a center, a cross section perpendicular to an in-plane direction of the outer panel member, the cross section having at least a portion of the top embedded in the resin member; 2. The automobile panel structure according to claim 1.

8. a cross-sectional portion perpendicular to an in-plane direction of the outer panel member, the top of the cross-sectional portion being entirely embedded in the resin member; 8. The automobile panel structure according to claim 7.

9. The resin member is a thermosetting resin. The automobile panel structure according to any one of claims 1 to 8.

10. The resin member is made of a thermoplastic resin.

9. The automobile panel structure according to claim 1,

11. The resin member includes a plurality of resin members, 11. The automobile panel structure according to claim 1, wherein a plurality of the resin members are connected to each other along an in-plane direction of the outer panel member.

12. The resin members are connected to each other by an adhesive.

12. The automobile panel structure according to claim 11.

13. The plurality of resin members are connected to each other by fitting.

13. The automobile panel structure according to claim 11 or 12.

14. An adhesive portion that joins the outer panel member and the resin member and an adhesive portion that joins the outer panel member and the inner member are made of the same material. The automobile panel structure according to any one of claims 1 to 13.

15. The outer panel member has a plate thickness of 0.30 mm or more and 0.55 mm or less. The automobile panel structure according to any one of claims 1 to 14.

16. The thickness of the resin member at a portion where the dimension perpendicular to the in-plane direction of the outer panel member is maximum is 3 mm or more and 60 mm or less. The automobile panel structure according to any one of claims 1 to 15.

Images