Automobile Roof Panel Structure

Abstract

To provide a roof panel structure for an automobile which can exhibit excellent quietness while lightweight.SOLUTION: A roof panel structure for an automobile has a plate-like outer panel member, an inner member which is arranged so as to face the inner surface of the outer panel member and extends in a first direction that is one direction in an in-plane direction of the outer panel member, and a resin member which is made of a resin and is joined to the inner surface of the outer panel member, wherein at least a part of the inner member is embedded in the resin member.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a roof panel structure for automobiles.

Background Art

[0002] Currently, technologies for lightweighting automobiles are in demand. If the outer panel of the roof constituting the automobile can be made to have higher strength, it is considered that sufficient strength can be maintained even if the outer panel is made thinner. Therefore, in order to lightweight automobiles, the development of technologies for increasing the strength of the outer panel of the roof has been underway.

[0003] However, if the outer panel of the roof is made thinner, unpleasant sounds such as vibration noise caused by raindrops from above and wind noise during driving are likely to enter the vehicle interior, and thus the problem of insufficient quietness becomes apparent.

[0004] As a technology focusing on sound insulation and lightweighting, for example, Patent Document 1 discloses a technology in which a thermosetting reinforcing sheet having adhesiveness is attached to the entire back surface of a panel, and the reinforcing sheet is foamed and cured during painting and baking of the panel surface.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] According to the technology of Patent Document 1, it is said that an automobile panel with improved rigidity of panel components and excellent sound insulation and lightweighting can be provided. However, even when using the technology of Patent Document 1, the problem of insufficient quietness as described above is not solved, and this has also been a factor hindering the lightweighting of automobiles.

[0007] The present disclosure has been made in view of the above problems, and an object of the present disclosure is to provide an automotive roof panel structure that is lightweight and yet exhibits excellent sound insulation properties.

Means for Solving the Problems

[0008] To solve the above problems, the present invention adopts the following configuration. (1) One aspect of the present invention is a plate-shaped outer panel member, an inner member disposed opposite to the inner surface of the outer panel member and extending along a first direction which is one direction in the in-plane direction of the outer panel member, It is a long member a resin member having a resin material and joined to the inner surface of the outer panel member, and at least a part of the inner member is buried in the resin member, Among the cross-sectional parts perpendicular to the first direction, in the cross-sectional part at the longitudinal center of the inner member and it is an automotive roof panel structure in which the resin member exists between the inner surface of the outer panel member and the inner member. (2) In the automotive roof panel structure described in (1) above, it may have a cross-sectional portion perpendicular to the first direction, in which the entire inner member is buried in the resin member. (3) In the automotive roof panel structure described in (1) or (2) above, a plurality of the inner members may be provided, and the plurality of inner members may be spaced apart and arranged in parallel along the inner surface of the outer panel member and in a second direction which is a direction perpendicular to the first direction. (4) In the automotive roof panel structure described in (3) above, at least a part of each of a pair of adjacent inner members in the second direction among the plurality of inner members may be buried in a single resin member. (5) In the automotive roof panel structure according to any one of (1) to (4) above, a pair of side frames extending along a second direction which is a direction perpendicular to the first direction and along the inner surface of the outer panel member are provided at each of a pair of edges of the outer panel member in the first direction, both ends of the inner member in the first direction are connected to the pair of side frames, and the resin member may be provided at both ends of the inner member in the first direction. (6) In the roof panel structure for an automobile according to any one of (1) to (5) above, the resin member may be a thermosetting resin. (7) In the roof panel structure for an automobile according to any one of (1) to (5) above, the resin member may be a thermoplastic resin. (8) In the roof panel structure for an automobile according to (7) above, the expansion ratio of the resin member may be from 5 times to 50 times. (9) In the roof panel structure for an automobile according to any one of (1) to (8) above, a plurality of the resin members may be provided, and the plurality of resin members may be connected to each other along the in-plane direction of the outer panel member. (10) In the roof panel structure for an automobile according to (9) above, the plurality of resin members may be connected to each other by an adhesive. (11) In the roof panel structure for an automobile according to (9) or (10) above, the plurality of resin members may be connected to each other by fitting. (12) In the roof panel structure for an automobile according to any one of (1) to (11) above, the adhesive portion that joins the outer panel member and the resin member and the adhesive portion that joins the outer panel member and the inner member may be made of the same material. (13) In the roof panel structure for an automobile according to any one of (1) to (12) above, the outer panel member may have a tensile strength of 440 MPa or more. (14) In the roof panel structure for an automobile according to any one of (1) to (13) above, the outer panel member may have a plate thickness of 0.30 mm or more and 0.55 mm or less. (15) In the roof panel structure for an automobile according to any one of (1) to (14) above, among the resin members, the thickness of the portion where the dimension in the direction perpendicular to the in-plane direction of the outer panel member is maximum may be 3 mm or more and 60 mm or less. (16) Another aspect of the present invention is a plate-shaped outer panel member, and an inner member that is disposed facing the inner surface of the outer panel member and extends along a first direction that is one direction in the in-plane direction of the outer panel member It is a long memberAn inner member, and a resin member made of resin and joined to the inner surface of the outer panel member, wherein only a part of the inner member is embedded in the resin member, and the resin member is joined to the inner surface of the outer panel member via an adhesive portion, which is a roof panel structure for an automobile.

Effect of the Invention

[0009] According to the above-described roof panel structure for an automobile, since the resin member is joined to the inner surface of the outer panel member while being firmly held by the inner member, the rigidity of the outer panel member can be improved, and the vibration characteristics can be improved such that high-frequency vibrations are easily attenuated. Therefore, excellent quietness can be exhibited while being lightweight.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

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Figure 8

Figure 9

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Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Mode for Carrying Out the Invention

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

[0012] The roof panel structure 100 according to the present embodiment is a roof panel structure applied to the roof of the automobile 1000 shown in FIG. 17. FIG. 1 is a perspective view showing the roof panel structure 100 as viewed from the outside of the vehicle, and FIG. 2 is a perspective view showing the roof panel structure 100 as viewed from the inside of the vehicle.

[0013] As shown in FIGS. 1 and 2, the roof panel structure 100 includes an outer panel member 110, an inner member 120 disposed to face 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 convex curved surface facing the outside of the vehicle. In the present disclosure, the surface on the outside of the vehicle may be referred to as the outer surface, and the surface on 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 plate thickness of the outer panel member 110 is excessively thin, the outer panel member 110 is likely to resonate with high-frequency vibrations. For this reason, unpleasant sounds such as vibration sounds caused by raindrops from above and wind noise during driving are likely to enter the vehicle, and the deterioration of quietness becomes apparent. Therefore, in order to surely exhibit excellent quietness, the plate thickness of the outer panel member 110 is preferably 0.30 mm or more, and more preferably 0.35 mm or more. In addition, according to the roof panel structure 100 according to the present embodiment, the rigidity of the outer panel member 110 can be improved by the configuration described later, and the vibration characteristics can be improved such that high-frequency vibrations are easily attenuated, and the quietness can be enhanced. For this reason, excellent quietness can be exhibited while reducing the plate thickness of the outer panel member 110.

[0016] (Inner member 120) The inner member 120 is a member having a role of reinforcing the roof panel structure 100, and is a long member disposed to face 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 is attached to the outer panel member 110 in such a manner that its longitudinal direction coincides with the vehicle width direction (first direction). That is, in the automobile 1000 to which the roof panel structure 100 is applied, the longitudinal direction of the inner member 120 coincides with the vehicle width direction (first direction) of the automobile.

[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-sectional portion including a top plate portion 121, a pair of side wall portions 123, 123 that bend and extend from both end portions of the top plate portion 121, and a pair of flange portions 125, 125 that bend and extend outward from end portions of the pair of side wall portions 123, 123 on the side opposite to the top plate portion 121. In addition, in the present disclosure, the width direction of the inner member 120 means a direction parallel to the top plate portion 121 among the directions perpendicular to the longitudinal direction of the inner member 120.

[0018] The inner member 120 can be obtained, for example, by press-forming 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 of filling a part of the inner member 120. In addition, in the present disclosure, "at least a part of the inner member is filled with the resin member" means that at least a part of the inner member enters the resin member and is held in a state of surface contact.

[0020] Among the resin members 130, it is preferable that the thickness of the maximum thickness portion in the direction perpendicular to the in-plane direction of the outer panel member 110 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 held more firmly, so it is preferable because it can compensate for the lack of rigidity associated with the thinning of the outer panel member 110. On the other hand, if the thickness of the maximum thickness portion of the resin member 130 exceeds 60 mm, the effect saturates, so it is preferably 60 mm or less.

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

[0022] When the resin material forming the resin member 130 contains a foaming agent, it is preferable in terms of improving the working efficiency when attaching the resin member 130. Examples of the foaming agent include N,N'-dinitrosopentamethylenetetramine, azodicarbonamide, 4,4'-oxybis(benzenesulfonyl hydrazide), 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, a part of the inner member 120 can be more surely embedded in the resin member 130, so that the effect of improving the quietness can be surely exhibited. Even when the foaming ratio exceeds 50 times, the effect saturates, so the upper limit is preferably 50 times.

[0023] Hereinafter, the positional relationship among the outer panel member 110, the inner member 120, and the resin member 130 will be described based on FIGS. 4 and 5.

[0024] FIG. 4 is a schematic diagram for explaining the positional relationship between members in the state of viewing the roof panel structure 100 from the vehicle interior side. As shown in FIG. 4, a pair of resin members 130, 130 are arranged in a manner of filling a part of the inner member 120 at the longitudinal center of the inner member 120.

[0025] FIG. 5(a) is a cross-sectional view taken along the arrow A in FIG. 4. That is, FIG. 5(a) shows a cross-sectional portion at the longitudinal center of the inner member 120 among the cross-sectional portions perpendicular to the longitudinal direction of the inner member 120 in the roof panel structure 100. As shown in FIG. 5(a), at the longitudinal center of the inner member 120, the widthwise end portions of the pair of flange portions 125, 125 of the inner member 120 enter from the side surfaces of the pair of resin members 130, 130 into the interiors of the pair of resin members 130, 130. That is, a part of the inner member 120 is filled in the resin member 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 the adhesive portion 150.

[0026] The adhesive portion 150 may be an adhesive. When using a mastic adhesive mainly composed of synthetic rubber as the material of the adhesive portion 150, it is possible to impart vibration characteristics to the outer panel member 110 that make it easier to attenuate high-frequency vibrations, and it is preferable because the quietness of the outer panel member 110 can be further enhanced. The adhesive portion 150 may be provided over the entire upper surface of the resin member 130, or may be provided only on a part thereof.

[0027] When the resin material forming the resin member 130 contains a foaming agent, the resin member 130 can be formed by spray-applying the resin material to the outer panel member 110 and / or the inner member 120 and heating it to cause foaming. In this case, since the upper surface of the resin member 130 is directly joined to the outer panel member 110, the adhesive portion 150 can be omitted.

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

[0029] The bonding portion 160 may be an adhesive. When using a mastic adhesive mainly composed of synthetic rubber as the material of the bonding portion 160, it is possible to impart vibration characteristics to the outer panel member 110 that are likely to attenuate high-frequency vibrations, and it is preferable because the quietness of the outer panel member 110 can be further enhanced. The bonding portion 160 is provided only on the longitudinal end side of the inner member 120, but it may also be provided at the longitudinal center portion. When the bonding portion 160 is also provided at the longitudinal center portion of the inner member 120, the bonding portion 160 may be continuously provided along the longitudinal direction of the inner member 120, or may be intermittently provided at a predetermined pitch along the longitudinal direction of the inner member 120.

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

[0031] As a method for obtaining the roof panel structure 100, · Pattern A in which assembly is performed after forming the resin member, and · Pattern B in which assembly is performed before forming the resin member Any of these can be adopted. Details will be described below.

[0032] (Pattern A) As the first step A11, a molding die is installed so as to surround a predetermined part of the inner member 120, and a resin material is injected into the inside of the molding die and hardened, thereby integrating the inner member 120 with the pair of resin members 130, 130. As 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] As the resin material used in the first step A11, either a thermoplastic resin or a thermosetting resin can be adopted. Further, the resin material may contain a foaming agent. In the first step A11, first, a resin material is injected into the inside of the molding die and hardened to mold intermediate products of the pair of resin members 130, 130, and each intermediate product is slit-processed, and the flange portion 125 of the inner member 120 is inserted into the slit to be integrated.

[0034] (Pattern B) As the first step B11, a resin material containing a foaming agent is spray-coated on the outer panel member 110 and / or the inner member 120. As 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. As the third step B13, the resin material is foamed to form resin members 130 in a state where the pair of flange portions 125, 125 of the inner member 120 are filled.

[0035] A thermosetting resin is used as the resin material spray-coated in the first step B11. The first step B11 and the second step B12 may be in reverse order. 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 quietness can be surely exhibited. On the other hand, when the foaming ratio is 50 times or less, it is possible to prevent the density of the resin member 130 from excessively decreasing, so that the vibration characteristics can be improved and the effect of improving the quietness can be surely exhibited. In the third step B13, foaming may be performed using the heat during electrocoating.

[0036] According to the above roof panel structure 100, a part 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. Therefore, compared with the case where the resin member 130 is simply arranged only between the outer panel member 110 and the inner member 120, the vibration characteristics of the outer panel member 110 can be improved and the quietness can be improved. In this way, since the quietness can be improved, it is possible to prevent the decrease in quietness that becomes apparent when the outer panel member 110 is thinned and weight-reduced. Therefore, according to the above roof panel structure 100, excellent quietness can be exhibited while being lightweight.

[0037] Hereinafter, a modification of the roof panel structure 100 described in the first embodiment will be described. For members that are substantially the same as those of the roof panel structure 100, the description will be omitted using the same reference numerals.

[0038] (First Modification Example) The roof panel structure 100 according to the above first embodiment has a configuration having a pair of resin members 130. However, the roof panel structure 100A according to the first modification example has a configuration having a single resin member 130A. FIG. 6 is a schematic diagram for explaining the positional relationship between members in the state of viewing the roof panel structure 100A according to the first modification from the vehicle interior side. (a) of FIG. 7 is a cross-sectional view taken along arrow C of FIG. 6, and (b) of FIG. 7 is a cross-sectional view taken along arrow D of FIG. 6. In this roof panel structure 100A, a single resin member 130A fills a pair of flange portions 125, 125 of the inner member 120 and a part of a pair of side wall portions 123. According to this roof 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 also exists in the region between the pair of flange portions 125, 125, a wide portion of the outer panel member 110 can be joined to the resin member 130A. Therefore, the vibration characteristics of the outer panel member 110 can be improved, and the quietness can be further enhanced. Note that the single resin member 130A may be configured by connecting a plurality of divided resin members.

[0039] (Second Modification) Furthermore, like the roof panel structure 100B according to the second modification, it may have a cross-sectional portion in which the entire inner member 120 is filled by a single resin member 130B. FIG. 8 is a schematic diagram for explaining the positional relationship between members in the state of viewing the roof panel structure 100B according to the second modification from the vehicle interior side. (a) of FIG. 9 is a cross-sectional view taken along arrow E of FIG. 8, and (b) of FIG. 9 is a cross-sectional view taken along arrow F of FIG. 8. In this roof panel structure 100B, as shown in (a) of FIG. 9, in the cross-sectional portion at the center in the longitudinal direction of the inner member 120, the entire inner member 120 (that is, the top plate portion 121, a pair of side wall portions 123, 123, and a pair of flange portions 125, 125) is filled by a single resin member 130B. According to this roof panel structure 100B, since the entire inner member 120 has a cross-sectional portion buried in a single resin member 130B, a wider portion of the inner member 120 can be held by the resin member 130B. Furthermore, since the resin member 130B also exists in the region between the pair of flange portions 125, 125, a wide portion of the outer panel member 110 can be joined to the resin member 130B. Therefore, the vibration characteristics of the outer panel member 110 can be improved, and the quietness can be further enhanced. Note that the single resin member 130B may be configured by connecting a plurality of divided resin members.

[0040] As a method for obtaining the roof panel structure 100A according to the first modification or the roof panel structure 100B according to the second modification, similar to the method for obtaining the roof panel structure 100, · Pattern A in which assembly is performed after forming the resin member, and · Pattern B in which assembly is performed before forming the resin member either can be adopted.

[0041] Note that in Pattern B, when the order of the first step B11 and the second step B12 is reversed (that is, when the resin material containing the foaming agent is spray-coated after attaching the inner member 120 to the outer panel member 110 with an adhesive or the like), it may be spray-coated from the gap between the flange portion 125 and the outer panel member 110. However, when the gap is narrow, holes for spray coating may be formed in the top plate portion 121 or the side wall portion 123 of the inner member 120.

[0042] (Third Modification) In the roof panel structure 100 according to the above-described first embodiment, the configuration has a single inner member 120, but a configuration having a plurality of inner members 120 may also be used. FIG. 10 is a schematic diagram for explaining the positional relationship between members in a state where the roof panel structure 100C according to the third modification is viewed from the vehicle interior side. In this roof panel structure 100C, the first inner member 120C1 and the second inner member 120C2 are arranged in a manner spaced apart in the longitudinal direction (second 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 is parallel to the longitudinal direction of the second inner member 120C2. For each of the first inner member 120C1 and the second inner member 120C2, a pair of first resin members 130C1, 130C1 and a pair of second resin members 130C2, 130C2 that fill a pair of flange portions 125, 125 are provided. 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 the description thereof is omitted. According to the roof panel structure 100C according to the third modification example, even when the size of the outer panel member 110 is large, the vibration characteristics can be improved and the quietness can be enhanced. In addition, depending on the shape and size of the outer panel member 110, three or more inner members 120 may be provided, or a plurality of inner members 120 may be provided in a manner such that their longitudinal directions intersect each other. Also, in the example shown in FIG. 10, the first resin member 130C1 and the second resin member 130C2 are arranged to be spaced apart from each other at the center in the longitudinal direction of the vehicle, but they may be integrated with each other. That is, a configuration may be adopted in which at least a part of each of a pair of adjacent inner members 120 in the longitudinal direction of the vehicle is filled with a single (common) resin member 130.

[0043] (Fourth Modification Example) In the roof panel structure 100 according to the above-described first embodiment, each of the pair of resin members 130, 130 is constituted by a single member, but each resin member 130 may have a configuration in which a plurality of divided members are connected along the in-plane direction of the outer panel member 110. FIG. 11 is a schematic diagram for explaining the positional relationship between members in a state where the roof panel structure 100D according to the fourth modification is viewed from the inside of the vehicle. In this roof panel structure 100D, there are a first resin member 130D1 and a second resin member 130D2 that are divided into two in the vehicle width direction (the first direction), which is the longitudinal 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 joining the end face 131D1 of the first resin member 130D1 and the end face 131D2 of the second resin member 130D2 with an adhesive. Since the first resin member 130D1 and the second resin member 130D2 have the same configuration as the resin member 130, the description thereof is omitted. According to the roof panel structure 100D according to the fourth modification, even when the size of the outer panel member 110 is large, the vibration characteristics can be improved and the quietness can be enhanced.

[0044] Furthermore, FIG. 12 is a schematic diagram for explaining the positional relationship between members in a state where the roof panel structure 100E according to the fifth modification is viewed from the inside of the vehicle. In this roof panel structure 100E, there are a first resin member 130E1 and a second resin member 130E2 that are divided into two in the vehicle width direction (the first direction), which is the longitudinal 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 by fitting the end face 131E1 of the first resin member 130E1 and the end face 131E2 of the second resin member 130E2 to each other. Specifically, the first resin member 130E1 and the second resin member 130E2 each have convex portions and concave portions alternately on the end faces 131E1 and 131E2 facing each other, and the first resin member 130E1 and the second resin member 130E2 are connected by fitting the convex portions and concave portions of the end face 131E1 to the concave portions and convex portions of the end face 131E2. Since the first resin member 130E1 and the second resin member 130E2 have the same configuration as the resin member 130, the overlapping description is omitted. According to the roof panel structure 100D according to the fifth modification example, even when the dimensions of the outer panel member 110 are large, the vibration characteristics can be improved and the quietness can be enhanced. Also, since it is not essential to join the end faces with an adhesive as in the roof panel structure 100 according to the fourth modification example, the workability during installation is improved. However, when joining the fitting portions of the convex portion and the concave portion with an adhesive, it is preferable in that the first resin member 130E1 and the second resin member 130E2 can be more reliably prevented from falling off.

[0045] (Sixth Modification Example) FIG. 13 is a schematic diagram showing the positional relationship between members in the roof panel structure 100F according to the sixth modification example. FIG. 14 is a cross-sectional view taken along the G arrow direction in FIG. 13. In this roof 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 in a manner extending in the longitudinal direction (second direction) of the vehicle. The side frame 170 may be, for example, a hollow elongated member formed from a metal plate such as a steel plate. In this roof panel structure 100F, both longitudinal ends of the inner member 120 are fixed to a pair of side frames 170, 170 by welding or the like. Furthermore, both longitudinal ends of the inner member 120 are embedded in a resin member 130F as shown in FIG. 14. According to this aspect, 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 whose both ends are fixed to a pair of side frames 170, 170. Therefore, the vibration characteristics of the outer panel member 110 can be improved and the quietness can be further enhanced.

[0046] (Other Modification Examples) As described above, the roof panel structure of the present disclosure has been described based on one embodiment and its modification examples. However, the roof panel structure of the present disclosure is not limited to this. Various other modification examples can be adopted in addition to the above. For example, a member with a hat-shaped cross-section is used as the inner member 120, but a member with a U-shaped cross-section or a T-shaped cross-section may also be used. Also, the resin member 130 is configured to be provided only in a part of the longitudinal direction of the inner member 120, but the resin member 130 may be configured to be provided over the entire length of the longitudinal direction of the inner member 120. For example, by spray-applying a resin material to the entire inner member 120, the resin member 130 can be provided in a manner that completely surrounds and fills the inner member 120.

Explanation of Reference Numerals

[0047] 100 Automobile roof panel structure 110 Outer panel member 120 Inner member 130 Resin member 150 Adhesive part 160 Adhesive part 170 Side frame 1000 Automobile

Claims

1. A plate-shaped outer panel member, an inner member which is arranged to face the inner surface of the outer panel member and is a long member extending along a first direction which is one direction in the in-plane direction of the outer panel member, a resin member whose material is resin and which is joined to the inner surface of the outer panel member, and having, at least a part of the inner member is buried in the resin member, in a cross-sectional portion perpendicular to the first direction, in a cross-sectional portion at the longitudinal center of the inner member, the resin member exists between the inner surface of the outer panel member and the inner member A roof panel structure for an automobile, characterized in that.

2. It has a cross-sectional portion perpendicular to the first direction, in which the entire inner member is buried in the resin member The roof panel structure for an automobile according to claim 1, characterized in that.

3. having a plurality of the inner members, the plurality of inner members are arranged in parallel, separated from each other in a second direction which is a direction perpendicular to the first direction and along the inner surface of the outer panel member The roof panel structure for an automobile according to claim 1 or 2, characterized in that.

4. At least a part of each of a pair of adjacent inner members in the second direction among the plurality of inner members is buried in a single resin member The roof panel structure for an automobile according to claim 3, characterized in that.

5. On each of a pair of edges in the first direction of the outer panel member, a pair of side frames extending along a second direction which is a direction perpendicular to the first direction and along the inner surface of the outer panel member are provided, both ends of the inner member in the first direction are connected to the pair of side frames, the resin member is provided at both ends of the inner member in the first direction The roof panel structure for an automobile according to any one of claims 1 to 4, characterized in that.

6. The resin member is a thermosetting resin The roof panel structure for an automobile according to any one of claims 1 to 5, characterized in that.

7. The resin member is a thermoplastic resin The roof panel structure for an automobile according to any one of claims 1 to 5, characterized in that.

8. The foaming ratio of the resin member is 5 to 50 times The roof panel structure for an automobile according to claim 7, characterized in that.

9. having a plurality of the resin members, the plurality of resin members are connected to each other along the in-plane direction of the outer panel member The automobile roof panel structure according to any one of claims 1 to 8, characterized in that...

10. A plurality of the resin members are connected to each other by an adhesive. The automobile roof panel structure according to claim 9, characterized in that...

11. A plurality of the resin members are connected to each other by fitting. The automobile roof panel structure according to claim 9 or 10, characterized in that...

12. An adhesive portion for joining the outer panel member and the resin member and an adhesive portion for joining the outer panel member and the inner member are made of the same material. The automobile roof panel structure according to any one of claims 1 to 11, characterized in that...

13. The outer panel member has a tensile strength of 440 MPa or more. The automobile roof panel structure according to any one of claims 1 to 12, characterized in that...

14. The outer panel member has a plate thickness of 0.30 mm or more and 0.55 mm or less. The automobile roof panel structure according to any one of claims 1 to 13, characterized in that...

15. Among the resin members, the thickness of the portion where the dimension in the direction perpendicular to the in-plane direction of the outer panel member is the largest is 3 mm or more and 60 mm or less. The automobile roof panel structure according to any one of claims 1 to 14, characterized in that...

16. A plate-shaped outer panel member, An inner member that is disposed opposite to the inner surface of the outer panel member and is a long member extending along a first direction that is one direction in the in-plane direction of the outer panel member, A resin member whose material is resin and that is joined to the inner surface of the outer panel member, having Only a part of the inner member is embedded in the resin member, The resin member is joined to the inner surface of the outer panel member via an adhesive portion. An automobile roof panel structure, characterized in that...

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