Reinforcement structure of panel parts

Abstract

The reinforcing structure (1) of the panel component (2) comprises a panel component (2) and a wire (3). The panel component (2) comprises a panel main body (21) bent to bulge outward. The wire (3) comprises a first end (31) and a second end (32). The first end (31) is joined to the inner surface (21a) of the first position (211) in the panel main body (21). The second end (32) is joined to the inner surface (21a) of the second position (212) in the panel main body (21). The wire (3) is stretched from the first position (211) to the second position (212).

Description

Technical Field

[0001] The present disclosure relates to a reinforcement configuration for a panel component. Background Art

[0002] Automobiles are equipped with panel components such as outer plate panels. Panel components require tensile rigidity. In the past, it is known that there are reinforcement structures for increasing the tensile rigidity of panel components used in automobile doors (for example, refer to Japanese Patent Publication No. 2019-156384 (Patent Document 1) and Japanese Patent Publication No. 2018-016171 (Patent Document 2)). In this specification, panel components used in automobile doors are sometimes referred to as door panel components.

[0003] Fig.28 It is a cross-sectional view showing an example of a conventional reinforcement structure 301 . Fig.29 3 is a cross-sectional view showing another example of the conventional reinforcement structure 301. Fig.28 and Fig.29 , the upper portion shows the reinforcement structure 301 before completion, and the lower portion shows the reinforcement structure 301 after completion.

[0004] Fig.28 The reinforcement structure 301 shown includes a door panel member 302 including a panel body 321. A reinforcement member 303 is attached to the inner surface 321a of the panel body 321. That is, the entire area of ​​the reinforcement member 303 overlaps and is bonded to the panel body 321. Thus, the tensile rigidity of the panel body 321 is ensured.

[0005] The reinforcement member 303 is made of resin. The reinforcement member 303 is attached to the inner surface 321a of the panel main body 321 before baking coating (see Fig.28 The reinforcing member 303 attached to the panel main body 321 is cured by the heat during the baking coating and is closely attached to the panel main body 321.

[0006] Usually, the door panel component 302 including the panel main body 321 is made of steel. The linear expansion coefficients are greatly different between the resin reinforcement 303 and the steel panel main body 321. Therefore, during the baking coating, if heat is applied to the door panel component 302 to which the reinforcement 303 is attached, a difference occurs between the deformation amount of the reinforcement 303 and the deformation amount of the panel main body 321. Therefore, the panel main body 321 deforms elastically, and plastically depending on the situation. As a result, the panel main body 321 produces a concave-convex 322 (see Fig.28 ). Therefore, in Fig.28 In the reinforcement structure 301 shown, the surface quality of the door panel member 302 may be reduced.

[0007] In contrast, Fig.29 In the reinforcement structure 301 shown, the reinforcement member 303A attached to the inner surface 321a of the panel main body 321 is made of steel. Therefore, the linear expansion coefficient of the reinforcement member 303A is unchanged relative to the linear expansion coefficient of the panel main body 321. In this way, the surface quality of the door panel component 302 will not be reduced due to the heat during baking and painting.

[0008] However, in this case, the dimensional accuracy of the reinforcement member 303A must be strictly managed. This is because if the reinforcement member 303A with low dimensional accuracy is attached to the panel main body 321 (see Fig.29 ), the panel body 321 elastically deforms along the shape of the reinforcement 303A, and may plastically deform depending on the situation (see Fig.29 ). Therefore, even if Fig.29 The reinforcement structure 301 shown may also cause a reduction in the surface quality of the door panel component 302 .

[0009] Prior art literature

[0010] Patent Literature

[0011] Patent Document 1: Japanese Patent Application Publication No. 2019-156384

[0012] Patent Document 2: Japanese Patent Application Publication No. 2018-016171 Summary of the invention

[0013] Problem that the invention aims to solve

[0014] As described above, in the conventional reinforcement structure, the surface quality of the panel member may be reduced. In addition, if the surface quality of the panel member is reduced, the tensile rigidity of the panel member may not be improved as expected.

[0015] An object of the present disclosure is to provide a reinforcement structure of a panel member that can ensure the surface quality of the panel member and improve the tensile rigidity of the panel member.

[0016] Solutions for solving problems

[0017] The reinforcement structure of the panel component disclosed in the present invention comprises a panel component and a wire. The panel component comprises a panel body portion bent to bulge outward. The wire has a first end and a second end. The first end is joined to the inner surface of the first position in the panel body portion. The second end is joined to the inner surface of the second position in the panel body portion. The wire is stretched from the first position to the second position.

[0018] Another reinforcement structure of a panel component disclosed in the present invention comprises a panel component, an auxiliary component, and a wire. The panel component includes a flat panel main body or a panel main body bent to bulge outward. The auxiliary component is arranged on the inner side of the panel component and is integrated with the panel component. The wire has a first end and a second end. The first end is joined to the inner surface of the first position in the panel main body. The second end is joined to the auxiliary component. The wire is stretched from the first position to the auxiliary component.

[0019] Another reinforcement structure of a panel component disclosed in the present invention comprises a panel component, a receiving portion, and a wire. The panel component includes a flat panel body portion or a panel body portion bent to bulge outward. The receiving portion protrudes from the inner surface of the panel body portion. The wire has a first end and a second end. The first end is joined to the inner surface of a first position in the panel body portion. The second end is joined to the inner surface of a second position in the panel body portion that is located on the opposite side of the first position relative to the receiving portion. The wire is stretched from the first position to the second position by means of the receiving portion.

[0020] Effects of the Invention

[0021] According to the reinforcement structure of the panel component disclosed in the present invention, the surface quality of the panel component can be ensured, and the tensile rigidity of the panel component can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view showing the reinforcement structure of the first embodiment.

[0023] Figure 2 It is a top view of the reinforcement structure of the first embodiment.

[0024] Figure 3 This is a schematic diagram showing a state when a wire member is joined to a panel main body in the reinforcement structure of the first embodiment.

[0025] Figure 4A This is a perspective view of the panel component when a load is applied to the panel component without a wire member.

[0026] Figure 4B This is a perspective view of the panel component when a load is applied to the panel component without a wire member.

[0027] Figure 4C This is a schematic diagram showing the deformation behavior of the panel body when a load is applied to the panel member in a state where there is no wire.

[0028] Figure 5 This is a schematic diagram showing a state when a load is applied to the panel member from the outside in the reinforcement structure of the first embodiment.

[0029] Figure 6It is a top view of the reinforcement structure of the second embodiment.

[0030] Figure 7 It is a top view of the reinforcement structure of the third embodiment.

[0031] Figure 8 It is a diagram showing the results of the first load test related to the reinforcement structure of the second embodiment and the third embodiment.

[0032] Fig. 9 It is a diagram showing the results of the second load test related to the reinforcement structures of the second embodiment and the third embodiment.

[0033] Fig.10 It is a cross-sectional view showing the reinforcement structure of the fourth embodiment.

[0034] Fig.11 It is a cross-sectional view showing the reinforcement structure of the fifth embodiment.

[0035] Fig.12 It is a top view showing the reinforcement structure of the sixth embodiment.

[0036] Fig.13 It is a cross-sectional view showing a part of the reinforcement structure of the sixth embodiment.

[0037] Fig.14 It is a top view showing the reinforcement structure of the seventh embodiment.

[0038] Fig.15 It is a top view showing the reinforcement structure of the eighth embodiment.

[0039] Fig.16 It is a cross-sectional view showing the reinforcement structure of the ninth embodiment.

[0040] Fig.17 It is a top view showing the reinforcement structure of the ninth embodiment.

[0041] Fig.18 It is a cross-sectional view showing the reinforcement structure of the tenth embodiment.

[0042] Fig.19 It is a top view showing the reinforcement structure of the eleventh embodiment.

[0043] Fig. 20 It is a diagram showing the results of the third load test related to the reinforcement structure of the eleventh embodiment.

[0044] Fig.21 It is a cross-sectional view showing the reinforcement structure of the twelfth embodiment.

[0045] Fig. 22 It is a cross-sectional view showing the reinforcement structure of the 13th embodiment.

[0046] Fig.23 It is a cross-sectional view showing the reinforcement structure of the fourteenth embodiment.

[0047] Fig.24 It is a cross-sectional view showing the reinforcement structure of the fifteenth embodiment.

[0048] Fig.25 It is a cross-sectional view showing the reinforcement structure of the sixteenth embodiment.

[0049] Fig.26 It is a cross-sectional view showing the reinforcement structure of the seventeenth embodiment.

[0050] Fig. 27 It is a diagram showing the results of the 4th load test related to the reinforcement structure of the 17th embodiment.

[0051] Fig.28 This is a cross-sectional view showing an example of a conventional reinforcement structure.

[0052] Fig.29 This is a cross-sectional view showing another example of a conventional reinforcement structure. DETAILED DESCRIPTION

[0053] Hereinafter, embodiments of the present disclosure will be described. In addition, in the following description, embodiments of the present disclosure are described by way of example, but the present disclosure is not limited to the examples described below. In the following description, specific numerical values ​​and specific materials are sometimes illustrated, but the present disclosure is not limited to these examples.

[0054] The present inventors have conducted intensive studies to solve the above-mentioned problems and have obtained the following findings.

[0055] The panel component requires high tensile rigidity. The tensile rigidity is evaluated by the amount of elastic deformation of the panel component when a load is applied to the panel component from the outside. Specifically, in the panel body of the panel component, when a load is applied from the outside to the inside, the loaded portion is elastically displaced in the direction of the load. The smaller the amount of this elastic displacement, the higher the tensile rigidity.

[0056] As a method of improving the tensile rigidity of the panel member, a method of increasing the thickness of the panel member and a method of attaching a reinforcement member to the panel body portion may be considered.

[0057] The tensile rigidity of the panel component increases or decreases in proportion to the cube of the plate thickness. Therefore, if the thickness of the panel component is reduced for the purpose of weight reduction, the tensile rigidity will be greatly reduced. In addition, even if the panel component is made stronger by selecting materials, the effect of improving the tensile rigidity is low. This is because the tensile rigidity is evaluated by the amount of elastic deformation.

[0058] On the other hand, in the case of a method of attaching a reinforcement member to the panel main body, the problems described in the conventional reinforcement structure occur.

[0059] As described above, in the reinforcement structure of the previous panel component, the reinforcement is attached to the inner surface of the panel body, and the entire area of ​​the reinforcement overlaps and joins with the panel body. In this case, the joining area between the panel body and the reinforcement is large. If the joining area is large, the shape of the panel body is strongly affected by the properties of the reinforcement (linear expansion coefficient, shape and size). Therefore, the panel body is easily plastically deformed depending on the properties of the reinforcement.

[0060] Therefore, in the conventional reinforcement structure, it can be said that the reason why the surface quality of the panel component is reduced is that the bonding area between the panel main body and the reinforcement is large. In this way, it can be said that if the bonding area between the panel main body and the reinforcement is small, the surface quality of the panel component can be ensured. In order to make the bonding area between the panel main body and the reinforcement small, it is sufficient to only bond the end of the reinforcement to the panel main body.

[0061] The reinforcement structure of the panel member according to the embodiment of the present disclosure is completed based on the above-mentioned findings.

[0062] The reinforcement structure of the panel component of the embodiment of the present disclosure includes a panel component and a wire. The panel component includes a panel body portion that is bent to bulge outward. The wire has a first end and a second end. The first end is joined to the inner surface of the first position in the panel body portion. The second end is joined to the inner surface of the second position in the panel body portion. The wire is stretched from the first position to the second position (first structure).

[0063] In the reinforcement structure of the first structure, the panel component is not particularly limited as long as it has a panel body portion that is bent to bulge outward. In a typical example, the panel component is an outer panel for an automobile. The outer panel is, for example, a door outer panel, a hood (engine hood), a roof panel, and a fender.

[0064] The material of the wire is not limited. In a typical example, the wire is a metal wire. The material of the metal wire is not particularly limited. For example, the metal wire is a steel wire. The metal wire can be a single wire or a stranded wire. In addition, the wire can also be a CFRP (Carbon Fiber Reinforced Plastics) wire. The CFRP wire can be a CFRP strand or a CFRP gut. CFRP can be a thermosetting CFRP with a thermosetting resin (e.g., epoxy) as the base material, or a thermoplastic CFRP with a thermoplastic resin (e.g., polyamide) as the base material. The CFRP wire is more preferably a CFRP wire using continuous carbon fiber.

[0065] In addition, the diameter of the wire (metal wire, CFRP wire) is freely selected according to the design requirements. In the case where the cross section of the wire is not a circle, the diameter of the wire is set to the diameter of a circle with the same cross-sectional area (equivalent diameter). From the perspective of fully ensuring the rigidity of the wire and suppressing the increase in weight, the diameter of the wire is preferably 0.3mm to 3.0mm. More preferably, the diameter of the wire is 1.1mm to 2.5mm.

[0066] In the reinforcement structure of the first structure, the first end of the wire is connected to the first position of the panel body, and the second end of the wire is connected to the second position of the panel body. In other words, the wire is connected to the panel body through the first end and the second end. On this basis, the wire is stretched from the first position to the second position. In this case, the wire extends in a straight line between the first position and the second position. Moreover, the wire extending between the first position and the second position is separated from the inner surface of the panel body.

[0067] For the panel body of the panel component installed in the automobile, there are many cases where a load is applied from the outside. Hereinafter, in the panel body, the part where the load is assumed to be applied from the outside is sometimes referred to as the "load assumption point". If a load is applied to the load assumption point of the panel body, deflection occurs in the panel body. Specifically, in the panel body, the load assumption point is displaced in the direction of the load. In other words, the load assumption point is deformed toward the inside of the panel body. As the load assumption point is deformed, the local area separated from the load assumption point is deformed toward the outside of the panel body. Hereinafter, this area is sometimes referred to as the "outward deformation area". The outward deformation area is displaced in the direction opposite to the direction of the load and away from the load assumption point. When observing the panel component along the cross section, the outward deformation areas exist on both sides of the load assumption point.

[0068] According to the reinforcement structure of the first structure, the wire is stretched from the first position to the second position. The first position and the second position are respectively set at outward deformation areas separated from each other. In this case, when a load is applied to the panel main body, tension is generated in the wire. On the other hand, the first position and the second position of the panel main body receive a reaction force of the tension from the wire. Thus, the deformation of the first position and the second position of the panel main body is suppressed. By suppressing the deformation of the first position and the second position, the deformation of the load assumption point is suppressed. Therefore, the tensile rigidity of the panel component is improved. In short, the wire functions as a reinforcement.

[0069] In addition, according to the reinforcement structure of the first configuration, the wire material functioning as the reinforcement is joined to the panel body only through the first end and the second end. In this case, the joining area between the panel body and the wire material is small.

[0070] Therefore, compared with the case where the entire area of ​​the reinforcement overlaps and joins with the panel main body as in the conventional reinforcement structure, even if the dimensional accuracy of the wire (reinforcement) is not strictly managed, the shape of the wire has less influence on the shape of the panel main body. In addition, when heat is applied to the panel component and the wire by post-processing, the linear expansion coefficient of the wire has less influence on the shape of the panel main body, regardless of whether the material of the wire is the same or different from that of the panel component. Therefore, the surface quality of the panel component can be ensured.

[0071] The reinforcement structure of the first structure preferably has the following structure. The panel body includes a load assumption point where a load is assumed to be applied from the outside, and a first region and a second region. When a load is applied to the load assumption point from the outside in the absence of a wire, the first region and the second region are displaced in a direction opposite to the direction of the load and away from the load assumption point. The second region is located on the opposite side of the first region relative to the load assumption point. The first position is set in the first region, and the second position is set in the second region (second structure).

[0072] In the reinforcement structure of the second structure, the first region and the second region correspond to the above-mentioned outward deformation region. In this case, the surface quality of the panel member can be more fully ensured, and the tensile rigidity of the panel member can be more fully improved.

[0073] Another reinforcement structure of a panel component of an embodiment of the present disclosure includes a panel component, an auxiliary component, and a wire. The panel component includes a flat panel main body or a panel main body bent to bulge outward. The auxiliary component is arranged on the inner side of the panel component and integrated with the panel component. The wire has a first end and a second end. The first end is joined to the inner surface of the first position in the panel main body. The second end is joined to the auxiliary component. The wire is stretched from the first position to the auxiliary component (third structure).

[0074] The same panel member as the reinforcement structure of the first structure described above is applicable to the panel member of the reinforcement structure of the third structure. However, in the case of the third structure, the panel body portion to which the wires are joined is bent to be convex outward or flat.

[0075] The auxiliary component is not particularly limited as long as it is disposed inside the panel component and integrated with the panel component. For example, when the panel component is a door outer panel, the auxiliary component is a door inner panel, a door anti-collision beam, and the like.

[0076] The same wire material as that of the reinforcement structure of the first structure described above is applicable to the wire material of the reinforcement structure of the third structure.

[0077] In the reinforcement structure of the third structure, the first end of the wire is joined to the first position of the panel main body, and the second end of the wire is joined to the auxiliary component. In other words, the wire is joined to the panel main body through the first end, and is joined to the auxiliary component through the second end. On this basis, the wire is stretched from the first position to the auxiliary component. In this case, similarly to the reinforcement structure of the first structure, the wire extends in a straight line between the first position and the auxiliary component. Moreover, the wire extending between the first position and the auxiliary component is separated from the inner surface of the panel main body.

[0078] According to the reinforcement structure of the third structure, the wire is stretched from the first position to the auxiliary component. The first position is set in the outward deformation area. In this case, when a load is applied to the panel main body, tension is generated in the wire. On the other hand, the first position of the panel main body receives a reaction force of the tension from the wire. Thus, the deformation of the first position of the panel main body is suppressed. By suppressing the deformation of the first position, the deformation of the load assumption point is also suppressed. Therefore, the tensile rigidity of the panel component is improved. In short, in the case of the reinforcement structure of the third structure, the wire also functions as a reinforcement.

[0079] In addition, according to the reinforcement structure of the third structure, the wire material that functions as a reinforcement member is joined to the panel main body only through the first end and joined to the auxiliary component through the second end. In this case, as in the reinforcement structure of the first structure described above, the joining area between the panel main body and the wire material is small. Therefore, the surface quality of the panel component can be ensured.

[0080] The reinforcement structure of the third structure preferably has the following structure. The panel body includes a load assumption point where a load is assumed to be applied from the outside and a first region. When a load is applied to the load assumption point from the outside in the absence of a wire, the first region is displaced in a direction opposite to the direction of the load and away from the load assumption point. The first position is set in the first region (the fourth structure).

[0081] In the reinforcement structure of the fourth configuration, the first region corresponds to the above-mentioned outward deformation region. In this case, the surface quality of the panel member can be more fully ensured, and the tensile rigidity of the panel member can be more fully improved.

[0082] Another reinforcement structure of a panel component of an embodiment of the present disclosure includes a panel component, a receiving portion, and a wire. The panel component includes a flat panel main body or a panel main body bent to bulge outward. The receiving portion protrudes from the inner surface of the panel main body. The wire has a first end and a second end. The first end is joined to the inner surface of a first position in the panel main body. The second end is joined to the inner surface of a second position in the panel main body that is located on the opposite side of the first position relative to the receiving portion. The wire is stretched from the first position to the second position by means of the receiving portion (the fifth structure).

[0083] The same panel member as the reinforcement structure of the first structure is applicable to the panel member of the reinforcement structure of the fifth structure. However, in the fifth structure, as in the third structure, the panel body to which the wires are joined is bent to be convex outward or flat.

[0084] The receiving portion is not particularly limited as long as it protrudes from the inner surface of the panel main body. For example, the receiving portion is formed independently of the panel component and joined to the panel main body. The receiving portion can also be formed integrally with the panel component by stamping. The material of the receiving portion is not particularly limited. In the case where the receiving portion is formed independently of the panel component, for example, the material of the receiving portion is plastic. The material of the receiving portion can also be metal. The metal is, for example, steel. The method of joining the receiving portion to the panel main body is, for example, bonding using an adhesive. The joining method can also be welding or mechanical fastening. In addition, for example, in the case where the panel component is a door outer panel and the receiving portion is formed integrally with the panel component, the characteristic line formed on the panel main body can be set as the receiving portion.

[0085] The same wire material as that of the reinforcement structure of the first structure described above is applicable to the wire material of the reinforcement structure of the fifth structure.

[0086] In the reinforcement structure of the fifth structure, the second position is located on the opposite side of the first position relative to the receiving portion. That is, the receiving portion exists between the first position and the second position. The first end of the wire is connected to the first position of the panel body, and the second end of the wire is connected to the second position of the panel body. That is, the wire is connected to the panel body through the first end and the second end. On this basis, the wire is stretched from the first position to the second position by means of the receiving portion.

[0087] According to the reinforcement structure of the fifth structure, the wire is stretched from the first position to the second position by means of the receiving portion. The first position and the second position are respectively set in mutually separated outward deformation areas. In this case, as in the reinforcement structure of the first structure described above, when a load is applied to the panel body, tension is generated in the wire. Thus, the tensile rigidity of the panel component is improved.

[0088] In addition, according to the reinforcement structure of the fifth structure, the bonding area between the panel body and the wire material is small, similarly to the reinforcement structure of the first structure described above. Therefore, the surface quality of the panel member can be ensured.

[0089] The reinforcement structure of the fifth structure preferably has the following structure. The panel body includes a load assumption point where a load is assumed to be applied from the outside, and a first region and a second region. When a load is applied to the load assumption point from the outside in the absence of a wire, the first region and the second region are displaced in a direction opposite to the direction of the load and away from the load assumption point. The second region is located on the opposite side of the first region relative to the load assumption point. The first position is set in the first region, and the second position is set in the second region. The receiving portion is provided between the first region and the second region (the sixth structure).

[0090] In the reinforcement structure of the sixth configuration, the first region and the second region correspond to the above-mentioned outward deformation region. In this case, the surface quality of the panel member can be more fully ensured, and the tensile rigidity of the panel member can be more fully improved.

[0091] In any of the reinforcement structures of the first to sixth structures, it is preferred that the panel member is made of metal (the seventh structure). In the case of the seventh structure, it is preferred that the panel member is made of steel (the eighth structure). However, the metal in this case is not limited to steel. For example, the metal may also be aluminum or magnesium.

[0092] In any one of the first to eighth reinforcement structures, the wire material is preferably a metal wire (ninth structure). In the case of the ninth structure, the wire material is preferably a steel wire (tenth structure).

[0093] In any of the reinforcement structures of the 7th to 10th structures, it is preferred that the material of the panel component and the material of the wire material are the same (the 11th structure). According to the reinforcement structure of the 11th structure, the linear expansion coefficient of the wire material is unchanged relative to the linear expansion coefficient of the panel body. Therefore, the linear expansion coefficient of the wire material does not affect the shape of the panel body. Therefore, the surface quality of the panel component can be more fully ensured.

[0094] In any of the reinforcement structures of the first to seventh structures, the wire material may be a CFRP wire (the twelfth structure). In addition, the Young's modulus of the wire material is preferably high because the effect of improving the tensile rigidity is greater.

[0095] In any one of the reinforcement structures of the first to twelfth structures, it is preferred that the panel member is an outer panel for an automobile (the thirteenth structure). In the case of the thirteenth structure, the panel member as the outer panel is, for example, a door outer panel, a hood, a roof panel, and a fender.

[0096] In the reinforcement structure of each structure described above, the method of joining the first end of the wire to the panel main body, the method of joining the second end of the wire to the panel main body, and the method of joining the second end of the wire to the auxiliary component are preferably bonded by an adhesive. This is because the appearance of the panel main body observed from the outside is not changed. However, the bonding method may also be welding or mechanical fastening.

[0097] When the panel component is subjected to a heat treatment (e.g., baking coating), the panel body and the wire can be joined either before or after the heat treatment. However, when the wire is a CFRP wire, the panel body and the wire are preferably joined after the heat treatment in consideration of the heat resistance of the wire or the difference in thermal expansion between the wire and the panel body.

[0098] Hereinafter, a specific example of the reinforcement structure of the panel member according to the present embodiment will be described with reference to the accompanying drawings. The same reference numerals are given to the same or corresponding parts in the drawings, and their description will not be repeated.

[0099] [First embodiment]

[0100] Reference Figure 1 to Figure 5 The reinforcement structure 1 of the panel component 2 of the first embodiment is described. In the reinforcement structure 1 of the present embodiment, the reinforced panel component 2 is an outer panel for an automobile. Examples of the outer panel include door outer panels, hoods, roof panels, and fenders. In this specification, when indicating directions in the reinforcement structure 1 of the panel component 2, mutually orthogonal X-direction, Y-direction, and Z-direction are sometimes used. The X-direction and the Y-direction are directions of expansion of the panel component 2 when the panel component 2 is viewed from above. The Z-direction is a direction perpendicular to the direction of expansion of the panel component 2, and the Z-direction is used to indicate the outer side O and the inner side I of the panel component 2.

[0101] Figure 1 and Figure 2 FIG. 1 is a diagram showing a reinforcement structure 1 of a panel member 2 according to a first embodiment. Figure 1 2 shows a cross-sectional view of the reinforcement structure 1 when the panel member 2 is cut along a plane perpendicular to the X direction. Figure 2 The figure shows the Figure 1 The panel component 2 is shown in a top view of the reinforcement structure 1.

[0102] Reference Figure 1 and Figure 2 The reinforcement structure 1 includes a panel member 2 and wires 3. In the present embodiment, the number of wires 3 is 3. However, the number of wires 3 is not limited to 3, and may be one, two, or more than three.

[0103] (Panel Part 2)

[0104] The panel component 2 of the present embodiment has a rectangular shape in a plan view when viewed along the Z direction. The panel component 2 includes a panel main body 21. The panel component 2 includes a first side edge portion 22A connected to one end of the panel main body 21 in the Y direction. The panel component 2 includes a second side edge portion 22B connected to the other end of the panel main body 21 in the Y direction.

[0105] The panel component 2 is made of a metal plate. Specifically, the panel component 2 is made of a steel plate. The panel body 21 is formed into a curved surface in which the central portion in the Y direction protrudes toward the outer side O. In other words, the panel body 21 is bent to bulge toward the outer side O. The cross-sectional shape of the panel body 21 is an arc shape. However, the cross-sectional shape of the panel body 21 can be any shape that bulges toward the outer side O, and can also be an elliptical arc shape or other convex curve shapes. In addition, in Figure 1 2 shows an exaggerated cross-sectional shape of the panel main body 21. This also applies to the following figures.

[0106] (Wire 3)

[0107] The wire 3 is made of a metal wire (metal wire). Specifically, the wire 3 is made of a steel wire (steel wire). The metal wire 3 is a single wire made of one wire. However, the metal wire 3 may also be a stranded wire formed by twisting a plurality of wires. The wire 3 is a slender linear member. For example, the diameter of the wire 3 is 2.0 mm. The diameter of the wire can be 0.3 mm to 3.0 mm.

[0108] The wires 3 are arranged along the Y direction of the panel main body 21. Specifically, the wires 3 extend in the Y direction from the first side edge 22A to the second side edge 22B within the range of the arc described by the cross section of the panel main body 21. The three wires 3 are arranged in a horizontal arrangement in the X direction at equal intervals (see Figure 2 ).

[0109] The wire 3 has a first end 31 and a second end 32. In the wire 3, one of the two ends located on opposite sides is the first end 31, and the other end is the second end 32. The first end 31 of the wire 3 is bonded to the first position 211 in the inner surface 21a of the panel main body 21 by the adhesive 4. The second end 32 is bonded to the second position 212 in the inner surface 21a of the panel main body 21 by the adhesive 4. The first position 211 is separated from the second position 212 in the Y direction of the panel main body 21.

[0110] Figure 3 Schematic diagram showing the state when the wire material 3 is joined to the panel main body 21 in the reinforcement structure of the first embodiment. Figure 3 In the figure, the upper part shows the situation before joining, and the lower part shows the situation after joining. Figure 3 The second end portion 32 of the wire 3 is representatively shown in FIG.

[0111] Reference Figure 3 As shown in the figure above, when the wire 3 is joined to the panel main body 21, the wire 3 bends the root 33 of each of the first end 31 and the second end 32. The root 33 contacts the inner surface 21a of the panel main body 21. From this state, as in Figure 3 As shown by arrows in the figure below, the wire 3 is rotated around the axis of the wire body 34. Then, the first end 31 and the second end 32 of the wire 3 are in close contact with the inner surface 21a of the panel body 21.

[0112] In this state, the adhesive 4 is supplied to the first end 31 and the second end 32 of the wire 3. The first end 31 and the second end 32 of the wire 3 are fixed by the cured adhesive 4. Thus, the first end 31 and the second end 32 of the wire 3 are joined to the panel body 21.

[0113] The method of joining the wire 3 to the panel main body 21 is not limited to Figure 3 The joining method shown. In order to improve the joining strength, for example, the first end portion 31 and the second end portion 32 may be pre-formed into a spiral shape. In addition, as a joining method, as long as bonding using an adhesive is adopted, a mark of joining that impairs the aesthetics will not appear on the outer surface 21b of the panel main body 21. From the viewpoint of aesthetics, the joining method is preferably bonding using an adhesive. However, in the case where the outer surface 21b of the panel main body 21 is eventually covered by other components, it does not matter whether it is aesthetically pleasing, so the joining method may also be welding or mechanical fastening.

[0114] When the panel member 2 is subjected to a heat treatment (for example, baking coating), the panel body 21 and the wire 3 may be joined together before or after the heat treatment.

[0115] Reference Figure 1 , the first end 31 of the wire 3 is joined to the first position 211 of the panel body 21, and the second end 32 of the wire 3 is joined to the second position 212 of the panel body 21. In other words, the wire 3 is joined to the panel body 21 through the first end 31 and the second end 32. On this basis, the wire 3 is stretched from the first position 211 to the second position 212.

[0116] In this case, the wire body 34 of the wire 3 extends on an imaginary straight line L passing through the first position 211 and the second position 212. That is, the wire 3 extends on a straight line between the first position 211 and the second position 212. Moreover, the wire body 34 extending between the first position 211 and the second position 212 is separated from the inner surface 21a of the panel body 21. A space S is formed between the wire body 34 and the panel body 21.

[0117] Figure 4A to Figure 4C Schematic diagram showing deformation behavior of the panel body 21 when a load F is applied to the panel member 2 from the outside O in the absence of the wire 3. Figure 4A and Figure 4B 2 shows a three-dimensional view of the panel component 2. Figure 4C 2 shows a cross section of the panel member 2 cut along a plane perpendicular to the X direction. These figures show results (simulation models and numerical values) of CAE (Computer Aided Engineering) analysis.

[0118] exist Figure 4A to Figure 4C In the panel component 2 shown, the central portion C of the panel main body 21 in the X direction and the Y direction protrudes most toward the outer side O. In the reinforcement structure 1 of the first embodiment, it is assumed that a load F is applied to the central portion C of the panel main body 21 from the outer surface 21b side toward the inner surface 21a side of the panel main body 21. In other words, the central portion C of the panel main body 21 is the above-mentioned load assumption point. If a load F is applied to the central portion C (load assumption point) of the panel main body 21 from the outer side O, deflection occurs in the panel main body 21. In this CAE analysis, the load F is set to two types: 10N and 25N.

[0119] exist Figure 4A and Figure 4B2 shows regions A1 and A2 that are deformed toward the outer side O when a load F is applied to the central portion C (load assumption point) in the panel main body 21. Regions A1 and A2 are displaced in the direction along the Z direction. From another perspective, regions A1 and A2 are displaced in the direction opposite to the direction of the load F. Furthermore, regions A1 and A2 are displaced in the direction along the Y direction. From another perspective, regions A1 and A2 are displaced in the direction away from the central portion C.

[0120] In addition, Figure 4C The displacement amounts at various parts of the panel main body 21 are shown in 100 times the numerical values ​​of the analysis results. Figure 4C In FIG. 1 , the solid line indicates the state before the load F is applied. The one-dot chain line indicates the state when the load F of 10 N is applied. The two-dot chain line indicates the state when the load F of 25 N is applied.

[0121] Reference Figure 4C When a load F is applied to the central portion C (load assumption point) of the panel body 21 from the outside O, the central portion C is displaced in the direction of the load F. That is, the central portion C is deformed toward the inside I of the panel body 21 .

[0122] As the central portion C deforms, in the panel main body 21, regions A1 and A2 separated from each other from the central portion C in the Y direction are deformed toward the outer side O of the panel main body 21. That is, regions A1 and A2 are displaced in the direction opposite to the direction of the load F and in the direction away from the central portion C. Therefore, regions A1 and A2 are the above-mentioned outward deformation regions. Region A1 is close to the first side edge 22A of the panel component 2. On the other hand, region A2 is close to the second side edge 22B of the panel component 2. When observing the panel component 2 along the cross section, regions A1 and A2 exist on both sides of the central portion C, respectively. From another perspective, region A2 is located on the opposite side of region A1 relative to the central portion C (load assumption point). Refer to Figure 4A to Figure 4C , the ranges of the regions A1 and A2 when the load F is 25N are wider than the ranges of the regions A1 and A2 when the load F is 10N.

[0123] The regions A1 and A2 obtained in the CAE analysis represent the outward deformation regions. When a load F is applied to the central portion C (load assumption point) of the panel component 2 from the outside O in the absence of the wire 3, the outward deformation region is displaced in the direction opposite to the direction of the load F and in the direction away from the central portion C. In this specification, the outward deformation region A1 on the side of the panel main body 21 close to the first side edge 22A is sometimes referred to as the first region A1. In addition, the outward deformation region A2 on the side of the panel component 2 close to the second side edge 22B is sometimes referred to as the second region A2.

[0124] Reference Figure 4C , the displacement amount of the first area A1 and the second area A2 to the side (Y direction) when the load F is 25N is larger than the displacement amount of the first area A1 and the second area A2 to the side (Y direction) when the load F is 10N. The first area A1 of the panel component 2 close to the first side edge 22A is displaced in the first deformation direction D1 toward the first side edge 22A. On the other hand, the second area A2 of the panel component 2 close to the second side edge 22B is displaced in the second deformation direction D2 toward the second side edge 22B. That is, the first area A1 and the second area A2 are displaced in the Y direction in a direction away from the central portion C (load assumption point) of the panel main body 21.

[0125] Reference Figure 1 , the first end 31 of the wire 3 is joined to the first position 211 of the panel body 21, and the second end 32 of the wire 3 is joined to the second position 212 of the panel body 21. Here, the first position 211 is set in the first area A1, and the second position 212 is set in the second area A2. Thus, the first position 211 joined by the first end 31 of the wire 3 and the second position 212 joined by the second end 32 of the wire 3 are both set in the outward deformation area.

[0126] Furthermore, the wire 3 extends linearly along the Y direction between the first position 211 (first area A1) and the second position 212 (second area A2).

[0127] In addition, in the present embodiment, the first region A1 and the second region A2 as the outward deformation region are derived by CAE analysis. However, the method of deriving the outward deformation region is not limited to such CAE analysis. For example, an experiment of applying a load F may be performed using the panel component 2 without the wire 3, and the outward deformation region may be derived from the experimental results.

[0128] (Function and Effect)

[0129] Hereinafter, the functions and effects of the reinforcement structure 1 of the present embodiment will be described.

[0130] In the panel body 21, the first end 31 of the wire 3 is joined to the first position 211, and the second end 32 of the wire 3 is joined to the second position 212. The first position 211 and the second position 212 are respectively set in the outward deformation areas (the first area A1 and the second area A2) separated from each other. On this basis, the wire 3 is stretched from the first position 211 to the second position 212. The wire 3 extends on the imaginary straight line L along the Y direction between the first position 211 and the second position 212.

[0131] Figure 5Schematic diagram showing a state when a load F is applied to the panel member 2 from the outside O in the reinforcement structure 1 of the present embodiment. Figure 5 The left side shows the cross section of the panel component 2. Figure 5 The portion to which the load F is applied and its vicinity are shown in an enlarged manner on the right side.

[0132] Reference Figure 5 When a load F is applied to the panel main body 21, deflection occurs in the panel main body 21. In this case, the first area A1 and the second area A2 of the panel main body 21 are deformed outward, and tension T is generated in the wire 3 as they deform. On the other hand, the first position 211 and the second position 212 of the panel main body 21 receive a reaction force of the tension T from the wire 3. Thus, the deformation of the first position 211 and the second position 212 of the panel main body 21 is suppressed. In the panel main body 21, by suppressing the deformation of the first position 211 and the second position 212, the deformation of the first area A1 and the second area A2 is suppressed. In other words, the deformation of the outward deformation area is suppressed. Thus, in the panel main body 21, the deformation of the load assumption point to which the load F is applied is suppressed. Therefore, the tensile rigidity of the panel component 2 is improved. In short, the wire 3 functions as a reinforcement.

[0133] In addition, the wire body 34 extending between the first position 211 and the second position 212 is separated from the inner surface 21a of the panel body 21. From another perspective, the wire 3 functioning as a reinforcement is joined to the panel body 21 only through the first end 31 and the second end 32. In this case, the joining area between the panel body 21 and the wire 3 is small.

[0134] Therefore, compared with the case where the entire area of ​​the reinforcement overlaps and joins with the panel main body 21 as in the conventional reinforcement structure, even if the dimensional accuracy of the wire 3 (reinforcement) is not strictly managed, the shape of the wire 3 has little effect on the panel main body 21. In addition, even if the panel component 2 and the wire 3 are subjected to a heat treatment (e.g., baking and coating), regardless of whether the material of the wire 3 is the same or different from that of the panel component 2, the linear expansion coefficient of the wire 3 has little effect on the shape of the panel main body 21. Therefore, the surface quality of the panel component 2 can be ensured.

[0135] In particular, in the present embodiment, the panel component 2 is made of metal (more specifically, steel), and the wire 3 is also made of metal (more specifically, steel). That is, the material of the panel component 2 is the same as the material of the wire 3 of the panel body 21 joined to the panel component 2. In this case, the linear expansion coefficient of the wire 3 is unchanged relative to the linear expansion coefficient of the panel body 21. Therefore, the linear expansion coefficient of the wire 3 does not affect the shape of the panel body 21. Therefore, the surface quality of the panel component 2 can be more fully ensured.

[0136] As described above, according to the reinforcement structure 1 of the panel member 2 of the present embodiment, the surface quality of the panel member 2 can be ensured, and the tensile rigidity of the panel member 2 can be improved.

[0137] In the present embodiment, the panel body 21 is bent to be convex toward the outer side O. That is, the panel body 21 is not bent to be concave toward the outer side O. In order to effectively demonstrate the effect of the present embodiment, the curvature radius R of the convex portion of the cross section of the panel body 21 is preferably greater than 100 mm.

[0138] Furthermore, Japanese Patent Application Laid-Open No. 2008-68757 discloses a method for improving tensile rigidity by installing a tension applying jig on the inner side of an outer door panel.

[0139] In this tensile rigidity improvement method, a tensioning jig having a higher linear expansion coefficient than the door outer panel is inserted into the door outer panel, and the panel is plastically deformed by utilizing the thermal strain in the painting process, thereby improving the rigidity of the door outer panel after the tensioning jig is removed.

[0140] In this tensile rigidity improvement method, the tension applying jig is removed from the door outer panel after the painting process. Therefore, no load is applied to the door outer panel in a state where the tension applying jig is attached.

[0141] In addition, in terms of the structure for removing the tensioning jig after the painting process, the tensioning jig is installed in an embedded structure. Therefore, if a load is applied to the door outer panel while the tensioning jig is still installed on the door outer panel, a gap is formed in the embedded portion, and the tensioning jig falls off.

[0142] On the other hand, in the reinforcement structure 1 of the present embodiment, the first end portion 31 and the second end portion 32 of the wire 3 are joined to the panel body portion 21. Thus, the wire 3 can improve the tensile rigidity of the panel member 2.

[0143] [Second embodiment]

[0144] Figure 6 FIG. 1 is a diagram showing a reinforcement structure 1A of a panel member 2 according to a second embodiment. Figure 61A is a top view of the reinforcing structure 1A when the panel member 2 is viewed from the inner side 1. The reinforcing structure 1A of the second embodiment is a deformation of the reinforcing structure 1 of the first embodiment. The following mainly describes the differences from the first embodiment.

[0145] In the reinforcement structure 1A of this embodiment, the panel member 2 has a rectangular shape in a plan view along the Z direction. Ribs 26 are formed at four side edges of the panel member 2 along the sides that constitute the contour of the panel member 2. The ribs 26 are formed outside the panel body 21.

[0146] The panel body 21 is provided with wires 3 in the same manner as in the first embodiment. However, in this embodiment, the number of wires 3 is five. The five wires 3 are arranged in a horizontal arrangement in the X direction at equal intervals. The panel member 2 is reinforced by the five wires 3. In this case, as compared with the reinforcement structure of the first embodiment, the tensile rigidity of the panel member 2 is improved as the number of wires 3 increases.

[0147] [Third Embodiment]

[0148] Figure 7 FIG. 1 is a diagram showing a reinforcement structure 1B of a panel member 2 according to a third embodiment. Figure 7 1 shows a top view of the reinforcing structure 1B when the panel member 2 is viewed from the inner side I. The reinforcing structure 1B of the third embodiment is a deformation of the reinforcing structure 1A of the second embodiment. The following mainly describes the differences from the second embodiment.

[0149] In the reinforcement structure 1B of the present embodiment, the number of wires 3 provided in the panel body 21 is 15. The panel member 2 is reinforced by the 15 wires 3. In this case, as compared with the reinforcement structures of the first and second embodiments, the tensile rigidity of the panel member 2 increases as the number of wires 3 increases.

[0150] The reinforcement structure 1B of the present embodiment includes a first wire 3A, a second wire 3B, and a third wire 3C having different lengths as the wires 3. Among the three types of wires 3, the first wire 3A has the shortest length. The second wire 3B has a longer length than the first wire 3A. The third wire 3C has the longest length. The first wire 3A, the second wire 3B, and the third wire 3C are arranged alternately in the X direction in a horizontal arrangement.

[0151] (First weighted test)

[0152] Figure 8 1 is a diagram showing the results of the first load test related to the reinforcement structure of the second embodiment and the third embodiment. Figure 8The relationship between the load applied to the panel member and the deflection amount of the panel member is shown in . The deflection amount refers to the displacement amount of the portion (load assumption point) to which the load is applied in the panel body.

[0153] In the first load test, a panel component 2 having a reinforcement structure 1A of the second embodiment and a panel component 2 having a reinforcement structure 1B of the third embodiment were prepared. In the reinforcement structure 1A of the second embodiment, the number of wires 3 was 5. In the reinforcement structure 1B of the third embodiment, the number of wires 3 was 15. In addition, for comparison, a panel component 2 of a non-reinforcement structure 1C without wires was prepared. A load was applied to each panel component 2, and the deflection amount was investigated.

[0154] Main conditions of the reinforced structures 1A and 1B and the non-reinforced structure 1C are shown below.

[0155] The material of the panel component 2 is set to be a cold-rolled steel plate JSC270D for automobiles (Japan Iron and Steel Federation Standard (JFS)). The plate thickness of the panel component 2 is set to 0.4 mm. In addition, the panel component 2 has a square shape in a plan view when viewed from the Z direction, and the length of each side constituting its outline is set to 400 mm. In the cross section of the panel main body 21, the curvature radius R of the portion bent into a convex shape is set to 1200 mm.

[0156] The material of the wire rod 3 is set to SS400 (JIS G 3101), a rolled steel material for general construction. The wire rod 3 is set to a single wire, and its diameter is set to 2.0 mm. In the reinforcement structure 1A of the second embodiment, the length of the wire rod 3 is set to 275 mm. In the reinforcement structure 1B of the third embodiment, the length of the third wire rod 3C is set to 275 mm, the length of the second wire rod 3B is set to 210 mm, and the length of the first wire rod 3A is set to 160 mm.

[0157] As the adhesive 4 for bonding the wire material 3 and the panel member 2 , low-odor acrylic adhesive Y-600 manufactured by CEMEDINE Co., Ltd. was used.

[0158] As a non-reinforced structure 1C, two panel components 2 were tested. Figure 8 , the test results of the non-reinforced structure 1C using the first panel component 2 are represented by 1C-A, and the test results of the non-reinforced structure 1C using the second panel component 2 are represented by 1C-B.

[0159] like Figure 8 As shown, the bending amount of the panel component 2 of the reinforced structure 1A of the second embodiment is smaller than the bending amount of the panel component 2 of the non-reinforced structure 1C (1C-A, 1C-B). Moreover, the bending amount of the panel component 2 of the reinforced structure 1B of the third embodiment is smaller than the bending amount of the panel component 2 of the reinforced structure 1A of the second embodiment.

[0160] (Second weighted test)

[0161] Fig. 9 2 is a diagram showing the results of the second load test related to the reinforcement structure of the second embodiment and the third embodiment. Fig. 9 The relationship between the weight per unit area of ​​the panel member and the deflection amount of the panel member is shown in . As in the first load test, the deflection amount refers to the displacement amount of the portion (load assumption point) to which the load is applied in the panel body.

[0162] In the second load test, a panel component 2 having the reinforcement structure 1A of the second embodiment and a panel component 2 having the reinforcement structure 1B of the third embodiment were prepared. In the reinforcement structure 1A of the second embodiment, the number of wires 3 was 5. In the reinforcement structure 1B of the third embodiment, the number of wires 3 was 15. In addition, for comparison, a panel component 2 having a non-reinforcement structure 1C without wires was prepared. A load of 90N was applied to each panel component 2, and the deflection amount was investigated.

[0163] The conditions of the second load test that are different from those of the first load test are as follows. As the non-reinforced structure 1C, the test was conducted with four panel components 2 having different plate thicknesses t. The plate thicknesses t of the four panel components 2 were set to 0.4 mm, 0.5 mm, 0.6 mm, and 0.7 mm, respectively. In addition, in the reinforced structure 1A of the second embodiment and the reinforced structure 1B of the third embodiment, the plate thickness t of the panel component 2 was set to 0.4 mm in the same manner as in the first load test.

[0164] like Fig. 9 As shown, compared with the non-reinforced structure 1C consisting only of the panel component 2 with a plate thickness t of 0.5 mm, the weight per unit area of ​​the reinforced structure 1A of the second embodiment is smaller, and the amount of deflection is slightly reduced. In addition, compared with the non-reinforced structure 1C consisting only of the panel component 2 with a plate thickness t of 0.5 mm, the weight per unit area of ​​the reinforced structure 1B of the third embodiment is smaller, and the amount of deflection is greatly reduced. Moreover, compared with the non-reinforced structure 1C consisting only of the panel component 2 with a plate thickness t of 0.7 mm, the weight per unit area of ​​the reinforced structure 1B of the third embodiment is greatly reduced, and the amount of deflection is slightly reduced. In addition, compared with the reinforced structure 1A of the second embodiment, the weight per unit area of ​​the reinforced structure 1B of the third embodiment increases slightly as the number of wires 3 increases.

[0165] [Fourth embodiment]

[0166] Fig.10 FIG. 1 is a diagram showing a reinforcement structure 1 of a panel member 2 according to a fourth embodiment. Fig.102 shows a cross-sectional view of the reinforcing structure 1 when the panel member 2 is cut along a plane perpendicular to the X direction. The reinforcing structure 1 of the fourth embodiment is a modification of the reinforcing structure 1 of the first embodiment. The following mainly describes the differences from the first embodiment.

[0167] The reinforcement structure 1 of the present embodiment includes a first wire 3A and a second wire 3B of different lengths as the wire 3. The length of the first wire 3A is shorter than the length of the second wire 3B. Similar to the first embodiment, the panel body 21 of the panel component 2 is bent to bulge toward the outside O. In the cross section of the panel component 2, the first wire 3A is arranged at a position close to the outside O of the panel component 2, and the second wire 3B is arranged at a position close to the inside I of the panel component 2. In other words, the first wire 3A and the second wire 3B are arranged in a manner arranged in the Z direction. From another perspective, the first wire 3A and the second wire 3B are arranged at the same position in the X direction.

[0168] The first end 31 of each of the first wire 3A and the second wire 3B is joined to a first position 211 in the first region A1 of the panel body 21 . The second end 32 of each of the first wire 3A and the second wire 3B is joined to a second position 212 in the second region A2 of the panel body 21 .

[0169] The reinforcing structure 1 of this embodiment can also produce the same effects as those of the first embodiment. In addition, according to the reinforcing structure 1 of this embodiment, the tensile rigidity can be further improved compared to the first embodiment.

[0170] [Fifth embodiment]

[0171] Fig.11 FIG. 1 is a diagram showing a reinforcement structure 1 of a panel member 2 according to a fifth embodiment. Fig.11 2 shows a cross-sectional view of the reinforcing structure 1 when the panel member 2 is cut along a plane perpendicular to the X direction. The reinforcing structure 1 of the fifth embodiment is a modification of the reinforcing structure 1 of the first embodiment. The following mainly describes the differences from the first embodiment.

[0172] The reinforcement structure 1 of the present embodiment includes a first wire 3A and a second wire 3B as the wire 3. Each wire 3A, 3B extends in the Y direction. In the cross section of the panel component 2, the first wire 3A is arranged at a position close to the first side edge 22A of the panel component 2, and the second wire 3B is arranged at a position close to the second side edge 22B of the panel component 2. The second wire 3B intersects with the first wire 3A. However, the second wire 3B is arranged at a position slightly offset from the first wire 3A in the X direction.

[0173] The length of the first wire 3A is the same as the length of the second wire 3B. However, the length of the first wire 3A may be different from the length of the second wire 3B.

[0174] In the first wire 3A, the first end 31 is joined to the first position 211 on the first side edge 22A side in the first area A1, and the second end 32 is joined to the second position 212 on the first side edge 22A side in the second area A2. In the second wire 3B, the first end 31 is joined to the first position 211 on the second side edge 22B side in the first area A1, and the second end 32 is joined to the second position 212 on the second side edge 22B side in the second area A2.

[0175] The reinforcing structure 1 of this embodiment can also produce the same effects as those of the first embodiment. In addition, according to the reinforcing structure 1 of this embodiment, the tensile rigidity can be further improved similarly to the fourth embodiment.

[0176] [Sixth embodiment]

[0177] Fig.12 and Fig.13 1 is a diagram showing a reinforcement structure 1 of a panel member 2 according to a sixth embodiment. Fig.12 2 shows a top view of the reinforcement structure 1 when the panel member 2 is viewed from the inner side I. Fig.13 2 shows a partial cross-sectional view of the reinforcing structure 1 when the panel member 2 is cut along a plane perpendicular to the X direction. The reinforcing structure 1 of the sixth embodiment is a modified version of the reinforcing structure 1 of the first embodiment. The following mainly describes the differences from the first embodiment.

[0178] In the reinforcement structure 1 of the present embodiment, it is assumed that load F is applied to three locations spaced apart from each other in the Y direction in the panel main body 21. That is, there are three assumed load points, namely, the first assumed load point P1, the second assumed load point P2, and the third assumed load point P3, in the panel main body 21. The first assumed load point P1, the second assumed load point P2, and the third assumed load point P3 are arranged in this order from the first side edge 22A of the panel main body 21 toward the second side edge 22B.

[0179] Moreover, for each of the assumed load points P1, P2, and P3, there is a corresponding outward deformation area. That is, there are the first area A1 and the second area A2 on both sides of the first assumed load point P1 in the Y direction. There are the first area A1 and the second area A2 on both sides of the second assumed load point P2 in the Y direction. There are the first area A1 and the second area A2 on both sides of the third assumed load point P3 in the Y direction.

[0180] The reinforcement structure 1 of this embodiment includes a first wire 3A, a second wire 3B, and a third wire 3C as the wire 3. Each wire 3A, 3B, and 3C extends in the Y direction. Each wire 3A, 3B, and 3C is arranged in a manner corresponding to each load assumption point P1, P2, and P3. The lengths of each wire 3A, 3B, and 3C are the same. However, the lengths of each wire 3A, 3B, and 3C may also be different from each other.

[0181] The first end 31 of the first wire 3A is joined to a first position 211 in the first region A1 corresponding to the first assumed load point P1. The second end 32 of the first wire 3A is joined to a second position 212 in the second region A2 corresponding to the first assumed load point P1.

[0182] The first end 31 of the second wire 3B is joined to the first position 211 in the first area A1 corresponding to the second assumed load point P2. The second end 32 of the second wire 3B is joined to the second position 212 in the second area A2 corresponding to the second assumed load point P2.

[0183] The first end 31 of the third wire 3C is joined to the first position 211 in the first area A1 corresponding to the third assumed load point P3. The second end 32 of the third wire 3C is joined to the second position 212 in the second area A2 corresponding to the third assumed load point P3.

[0184] The reinforcing structure 1 of this embodiment can also achieve the same effects as those of the first embodiment. In addition, even when the panel body 21 has a plurality of assumed load points, the reinforcing structure 1 of this embodiment can improve the tensile rigidity for each assumed load point.

[0185] [Seventh embodiment]

[0186] Fig.14 1 is a diagram showing a reinforcement structure 1 of a panel member 2 according to a seventh embodiment. Fig.14 1 shows a top view of the reinforcing structure 1 when the panel member 2 is viewed from the inner side 1. The reinforcing structure 1 of the seventh embodiment is a deformation of the reinforcing structure 1 of the first embodiment. The following mainly describes the differences from the first embodiment.

[0187] In the reinforcement structure 1 of the present embodiment, the panel component 2 has a rectangular shape in a plan view when viewed along the Z direction. The panel component 2 includes a panel main body 21. The panel main body 21 extends from the central portion of the panel component 2 to the vicinity of the four side edge portions. The panel main body 21 is formed into a spherical shape in which the central portion in the X direction and the Y direction protrudes toward the outer side O. In other words, the panel main body 21 is bent to bulge toward the outer side O. In this panel component 2, the central portion of the panel main body 21 protrudes most toward the outer side O. From another perspective, the panel main body 21 is bent in multiple directions. In addition, the panel main body 21 of the first embodiment is bent roughly in one direction (Y direction).

[0188] In the reinforcement structure 1 of the present embodiment, it is assumed that a load F is applied to the central part of the panel main body 21. That is, there is a load assumption point in the central part of the panel main body 21. There is an outward deformation area A corresponding to the load assumption point in the panel main body 21. Since the panel main body 21 is a spherical shape, the outward deformation area A is connected in a ring shape with the load assumption point as the center. Therefore, for example, in the cross section when the panel main body 21 is cut by a plane perpendicular to the Y direction, there are outward deformation areas A on both sides of the central part (load assumption point) of the panel main body 21. In this case, the outward deformation area A on one side can be regarded as the first area, and the outward deformation area A on the other side can be regarded as the second area.

[0189] The reinforcement structure 1 of the present embodiment includes a first wire 3A, a second wire 3B, and a third wire 3C as wires. The first wire 3A extends in the X direction. The second wire 3B is arranged on a straight line in a manner of obliquely crossing the first wire 3A. The third wire 3C extends in a direction substantially orthogonal to the second wire 3B.

[0190] The first wire 3A crosses the second wire 3B and the third wire 3C at a position deviated from the crossing position between the second wire 3B and the third wire 3C. Therefore, the three wires 3A, 3B, and 3C do not overlap at the same position. Each wire 3A, 3B, and 3C is arranged so as to pass through the central part (load assumption point) of the panel body 21 or its vicinity.

[0191] The first end 31 of the first wire 3A is joined to the first position 211 in the outward deformation region A regarded as the first region. The second end 32 of the first wire 3A is joined to the second position 212 in the outward deformation region A regarded as the second region. The same applies to the second wire 3B and the third wire 3C.

[0192] The reinforcing structure 1 of this embodiment can also achieve the same effects as those of the first embodiment. In addition, according to the reinforcing structure 1 of this embodiment, even when the panel body 21 is bent in multiple directions, the tensile rigidity can be improved.

[0193] [Eighth embodiment]

[0194] Fig.15 1 is a diagram showing a reinforcement structure 1 of a panel member 2 according to an eighth embodiment. Fig.15 2 shows a top view of the reinforcing structure 1 when the panel member 2 is viewed from the inner side 1. The reinforcing structure 1 of the eighth embodiment is obtained by applying the technical concept of the sixth embodiment to the reinforcing structure 1 of the seventh embodiment. The following mainly describes the differences from the seventh embodiment.

[0195] In the reinforcement structure 1 of the present embodiment, it is assumed that a load F is applied to four locations spaced apart from each other in the X direction and the Y direction in the spherical panel main body 21. That is, there are four assumed load points in the panel main body 21, namely, the first assumed load point P1, the second assumed load point P2, the third assumed load point P3, and the fourth assumed load point P4. The first assumed load point P1 and the second assumed load point P2 are arranged in this order from the first side edge 22A of the panel main body 21 toward the second side edge 22B. The third assumed load point P3 and the fourth assumed load point P4 are arranged in this order from the first side edge 22A of the panel main body 21 toward the second side edge 22B. The first assumed load point P1 and the third assumed load point P3 are arranged in a manner arranged in the X direction. The second assumed load point P2 and the fourth assumed load point P4 are arranged in a manner arranged in the X direction.

[0196] Moreover, there is a corresponding outward deformation area A for each load assumption point P1, P2, P3, and P4. Similar to the seventh embodiment, the outward deformation area A corresponding to the first load assumption point P1 is connected in a ring shape with the first load assumption point P1 as the center. Therefore, for example, in a cross section when the panel main body 21 is cut by a plane perpendicular to the Y direction, there are outward deformation areas A on both sides of the first load assumption point P1. In this case, the outward deformation area A on one side can be regarded as the first area, and the outward deformation area A on the other side can be regarded as the second area. The same content also applies to the second load assumption point P2, the third load assumption point P3, and the fourth load assumption point P4.

[0197] For the first load imaginary point P1, the reinforcement structure 1 of the present embodiment includes the first wire 3A, the second wire 3B and the third wire 3C as wires. The first wire 3A extends in the X direction. The second wire 3B is arranged on a straight line in a manner of crossing obliquely with respect to the first wire 3A. The third wire 3C extends in a direction substantially orthogonal to the second wire 3B. The three wires 3A, 3B, and 3C cross at the same position. Each wire 3A, 3B, and 3C is arranged in a manner of passing through the first load imaginary point P1 of the panel main body 21.

[0198] For the first load assumption point P1, the first end 31 of the first wire 3A is joined to the first position in the outward deformation area A regarded as the first area. The second end 32 of the first wire 3A is joined to the second position in the outward deformation area A regarded as the second area. The same content also applies to the second wire 3B and the third wire 3C. In addition, the same content also applies to the wires of the second load assumption point P2, the third load assumption point P3, and the fourth load assumption point P4.

[0199] According to the reinforcement structure 1 of this embodiment, it is possible to achieve the same effects as those of the sixth embodiment and the seventh embodiment. That is, according to the reinforcement structure 1 of this embodiment, even when the panel body 21 is bent in multiple directions and there are multiple load assumption points in the panel body 21, it is possible to increase the tensile rigidity for each load assumption point.

[0200] [Ninth embodiment]

[0201] Fig.16 and Fig.17 1 is a diagram showing a reinforcement structure 1 of a panel member 2 according to a ninth embodiment. Fig.16 2 shows a cross-sectional view of the reinforcement structure 1 when the panel member 2 is cut along a plane perpendicular to the X direction. Fig.17 The figure shows the Fig.16 The reinforcing structure 1 of the ninth embodiment is a plan view of the panel member 2 shown. The reinforcing structure 1 of the ninth embodiment is a modification of the reinforcing structure 1 of the first embodiment. The following mainly describes the differences from the first embodiment.

[0202] In the reinforcement structure 1 of the present embodiment, the panel component 2 has a rectangular shape in a plan view when viewed along the Z direction. The panel component 2 includes a panel body portion 21, an extension portion 23, and a flange portion 24. The panel body portion 21 is flat. The panel body portion 21 has a rectangular shape in a plan view when viewed along the Z direction. The extension portion 23 extends from each side constituting the contour of the panel body portion 21 toward the inner side I of the panel component 2. The flange portion 24 extends laterally from the extension portion 23. The extension portion 23 and the flange portion 24 correspond to the four side edge portions (the first side edge portion 22A, the second side edge portion 22B) of the panel component 2.

[0203] A receiving portion 25 is provided on the inner surface 21a of the panel main body 21. In the present embodiment, the receiving portion 25 protrudes from the central portion of the panel main body 21 toward the inner side I. The receiving portion 25 has a frustum shape. Specifically, the receiving portion 25 is in the shape of a truncated cone. However, the shape of the receiving portion 25 is not limited to a truncated cone, but may be in the shape of a prism. In addition, the shape of the receiving portion 25 is not limited to a frustum shape, but may be in the shape of a cylinder or a prism.

[0204] The receiving portion 25 is formed of plastic. The receiving portion 25 is bonded to the panel body 21 by an adhesive 4. However, the receiving portion 25 may be made of metal, such as steel. In order to avoid an increase in the weight of the reinforcement structure 1, the receiving portion 25 is preferably made of plastic.

[0205] In the case of the present embodiment, there is a load assumption point at the center portion of the panel main body 21 and its vicinity. That is, the load assumption point exists at the receiving portion 25 of the panel main body 21 and its vicinity. Furthermore, even when the panel main body 21 is flat, there is an outward deformation area. Similar to the case where the panel main body 21 is bent to bulge outward O, the outward deformation area of ​​the present embodiment is connected in a ring shape with the center portion (receiving portion 25) of the panel main body 21 as the center. Therefore, for example, in a cross section when the panel main body 21 is cut by a plane perpendicular to the X direction, there are outward deformation areas on both sides of the receiving portion 25 (load assumption point) of the panel main body 21. In this case, the outward deformation area on one side can be regarded as the first area A1, and the outward deformation area on the other side can be regarded as the second area A2.

[0206] The first position 211 is set in the first area A1 regarded as the outward deformation area on one side. The second position 212 is set in the second area A2 regarded as the outward deformation area on the other side. At this time, the second position 212 is located on the side opposite to the first position 211 with respect to the receiving portion 25. That is, the receiving portion 25 exists between the first position 211 and the second position 212.

[0207] The wire 3 is arranged so as to extend straightly from the receiving portion 25 toward both sides. For example, the wire 3 extends in the Y direction from the first side edge portion 22A side toward the second side edge portion 22B side. Fig.17 The reinforcement structure 1 of this embodiment includes four wires 3. The four wires 3 are arranged in a cross-shaped manner at the position of the receiving portion 25. From another perspective, the four wires 3 are arranged to extend radially with the receiving portion 25 as the center. However, the number of wires 3 is not limited to four, and may be one, two, or more than four.

[0208] Reference Fig.16 and Fig.17 , the first end 31 of the wire 3 is bonded to the first position 211 in the inner surface 21a of the panel main body 21 by the adhesive 4. The second end 32 of the wire 3 is bonded to the second position 212 in the inner surface 21a of the panel main body 21 by the adhesive 4. In addition, there is a receiving portion 25 between the first position 211 and the second position 212, so the wire 3 is stretched from the first position 211 to the second position 212 by means of the receiving portion 25. In other words, the wire 3 is supported by the receiving portion 25. In this case, the wire body 34 contacts the receiving portion 25 and bends at the position of the receiving portion 25. Therefore, the wire 3 extends in a straight line between the first position 211 and the receiving portion 25, and extends in a straight line between the second position 212 and the receiving portion 25. Furthermore, a portion of the wire body 34 extending between the first position 211 and the receiving portion 25 and a portion of the wire body 34 extending between the second position 212 and the receiving portion 25 are separated from the inner surface of the panel body 21 .

[0209] The wire material 3 is not joined to the receiving portion 25. However, the wire material 3 may be joined to the receiving portion 25. The joining method in this case is, for example, bonding using an adhesive.

[0210] In the reinforcement structure 1 of the present embodiment, when a load F is applied to the panel main body 21, a tension T is generated in the wire 3, similarly to the first embodiment, and the first position 211 and the second position 212 of the panel main body 21 receive a reaction force of the tension T from the wire 3. Thus, the deformation of the first position 211 and the second position 212 of the panel main body 21 is suppressed. In the panel main body 21, by suppressing the deformation of the first position 211 and the second position 212, the deformation of the first area A1 and the second area A2 is suppressed. In other words, the deformation of the outward deformation area is suppressed. Thus, in the panel main body 21, the deformation of the load assumption point to which the load F is applied is suppressed.

[0211] Therefore, according to the reinforcement structure 1 of the present embodiment, even when the panel body portion 21 is flat, it is possible to achieve the same effects as those of the first embodiment.

[0212] In the present embodiment, the receiving portion 25 supporting the wire 3 is provided on the flat panel main body 21. However, the receiving portion 25 supporting the wire 3 may be provided on the panel main body 21 that is curved to be convex toward the outer side O. That is, the structure in which the wire 3 is supported by the receiving portion 25 can be applied to the reinforcement structure 1 of the first to eighth embodiments.

[0213] [10th embodiment]

[0214] Fig.18 1 is a diagram showing a reinforcement structure 1 of a panel member 2 according to a tenth embodiment. Fig.18 , a cross-sectional view of the reinforcing structure 1 when the panel member 2 is cut along a plane perpendicular to the X direction is shown. The reinforcing structure 1 of the tenth embodiment is obtained by applying the technical concept of the sixth embodiment to the reinforcing structure 1 of the ninth embodiment. The following mainly describes the differences from the ninth embodiment.

[0215] In the reinforcement structure 1 of the present embodiment, it is assumed that a load F is applied to two locations spaced apart from each other in the Y direction in the flat panel main body 21. That is, there are two assumed load points, namely, a first assumed load point P1 and a second assumed load point P2, in the panel main body 21. The first assumed load point P1 and the second assumed load point P2 are arranged in this order from the first side edge 22A toward the second side edge 22B of the panel main body 21. A receiving portion 25 is provided at the position of each assumed load point P1, P2.

[0216] In the reinforcement structure 1 of this embodiment, as in the ninth embodiment, there is a corresponding outward deformation region for each load assumption point P1, P2 (receiving portion 25). Also, for the outward deformation region of each load assumption point P1, P2, a wire 3 is provided as in the ninth embodiment.

[0217] According to the reinforcement structure 1 of this embodiment, the same effects as those of the sixth embodiment and the ninth embodiment can be achieved. That is, according to the reinforcement structure 1 of this embodiment, even when the panel body 21 is flat and there are a plurality of load assumption points in the panel body 21, the tensile rigidity can be increased for each load assumption point.

[0218] [11th embodiment]

[0219] Fig.19 1D is a diagram showing a reinforcement structure 1D of a panel member 2 according to an eleventh embodiment. Fig.19 1 shows a top view of the reinforcing structure 1D when the panel member 2 is viewed from the inner side I. The reinforcing structure 1D of the eleventh embodiment is a deformation of the reinforcing structure 1 of the ninth embodiment. The following mainly describes the differences from the ninth embodiment.

[0220] In the reinforcement structure 1D of the present embodiment, the number of the receiving portions 25 is 5. The 5 receiving portions 25 are arranged horizontally in the X direction at equal intervals. In addition, a wire 3 is provided for each receiving portion 25. The wire 3 extends in the Y direction from the first side edge 22A side toward the second side edge 22B side. In this case, the 5 wires 3 are arranged horizontally in the X direction at equal intervals.

[0221] According to the reinforcement structure 1D of this embodiment, it is possible to achieve the same effects as those of the ninth embodiment.

[0222] (3rd weighted test)

[0223] Fig. 20 11 is a diagram showing the results of the third load test related to the reinforcement structure of the 11th embodiment. Fig. 20 The relationship between the weight per unit area of ​​the panel member and the deflection amount of the panel member is shown in . As in the first load test, the deflection amount refers to the displacement amount of the portion (load assumption point) to which the load is applied in the panel body.

[0224] In the third load test, a panel member 2 having the reinforcement structure 1D of the eleventh embodiment was prepared. In addition, for comparison, a panel member 2 having a non-reinforcement structure 1E without a wire member and a receiving portion was prepared. A load of 90 N was applied to each panel member 2, and the deflection amount was examined.

[0225] The main conditions of the reinforced structure 1D and the non-reinforced structure 1E are shown below.

[0226] The material of the panel component 2 is set to be a cold-rolled steel plate for automobiles JSC270D (Japan Iron and Steel Federation Standard (JFS)). In addition, the panel component 2 is set to be flat in the entire area. The panel component 2 has a square shape when viewed from the Z direction, and the length of each side constituting its outline is set to 400 mm. The height of the receiving portion 25 is set to 20 mm.

[0227] The material of the wire material 3 is set to general structural rolled steel material SS400 (JIS G 3101). The wire material 3 is set to be a single wire, and its diameter is set to be 2.0 mm. The length of the wire material 3 is set to be 275 mm.

[0228] As the adhesive 4 for bonding the wire material 3 and the panel member 2 , low-odor acrylic adhesive Y-600 manufactured by CEMEDINE Co., Ltd. was used.

[0229] In the reinforced structure 1D, the plate thickness t of the panel member 2 was set to 0.4 mm. As the non-reinforced structure 1E, four panel members 2 with different plate thicknesses t were tested. The plate thicknesses t of the four panel members 2 were set to 0.4 mm, 0.5 mm, 0.6 mm, and 0.7 mm, respectively.

[0230] like Fig. 20 As shown, when comparing the panel components 2 having the same plate thickness t of 0.4 mm, the deflection amount of the panel component 2 of the reinforced structure 1D is significantly smaller than the deflection amount of the panel component 2 of the non-reinforced structure 1E. Compared with the non-reinforced structure 1E consisting of only the panel component 2 with the plate thickness t increased to more than 0.5 mm, the weight per unit area of ​​the panel component 2 in the reinforced structure 1D is significantly reduced.

[0231] [12th embodiment]

[0232] Fig.21 1 is a diagram showing a reinforcement structure 1 of a panel member 2 according to a twelfth embodiment. Fig.21 2 shows a cross-sectional view of the reinforcing structure 1 when the panel member 2 is cut along a plane perpendicular to the X direction. The reinforcing structure 1 of the twelfth embodiment is a modified version of the reinforcing structure 1 of the eleventh embodiment. The following mainly describes the differences from the eleventh embodiment.

[0233] Generally, a character line is formed on a panel main body of a door outer panel along the vehicle length direction. The character line protrudes toward the inner side of the door outer panel. The door outer panel having the character line is integrally formed by stamping.

[0234] Reference Fig.21 In the reinforcement structure 1 of the present embodiment, the panel member 2 is a door outer panel, and the receiving portion 25 provided on the panel member 2 is a character line. In this case, the receiving portion 25 is formed integrally with the panel member 2. Fig.21 In the example shown, the X direction indicates the vehicle length direction, the Y direction indicates the vehicle height direction, and the Z direction indicates the left and right direction of the vehicle.

[0235] The receiving portion 25 is provided at, for example, the center portion in the Y direction (vehicle height direction) of the panel main body portion 21. The receiving portion 25 protrudes toward the inner side I of the panel member 2. In addition, the receiving portion 25 extends in the X direction (vehicle length direction). The wire 3 extends in the Y direction (vehicle height direction) from the first side edge portion 22A side toward the second side edge portion 22B side.

[0236] The reinforcing structure 1 of this embodiment can also achieve the same effects as those of the ninth embodiment. In addition, according to the reinforcing structure 1 of this embodiment, the receiving portion 25 is integrally formed with the panel member 2, so that the manufacturing cost can be suppressed.

[0237] In the present embodiment, the panel component 2 is a door outer panel, and the receiving portion 25 is a characteristic line provided on the panel component 2. However, the receiving portion 25 only needs to be formed integrally with the panel component 2, and the panel component 2 is not limited to the door outer panel. For example, the panel component 2 may also be a hood or a fender. In this case, the receiving portion 25 is a characteristic line provided on the hood or the fender.

[0238] [13th embodiment]

[0239] Fig. 22 1 is a diagram showing a reinforcement structure 1 of a panel member 2 according to a 13th embodiment. Fig. 222 shows a cross-sectional view of the reinforcing structure 1 when the panel member 2 is cut along a plane perpendicular to the X direction. The reinforcing structure 1 of the thirteenth embodiment is a modification of the reinforcing structure 1 of each of the above-mentioned embodiments. The following mainly describes the differences from the above-mentioned embodiments.

[0240] The reinforcement structure 1 of the present embodiment includes a panel member 2, an auxiliary member 5, and a wire 3. The panel member 2 includes a panel main body 21, and the panel main body 21 is bent to be convex toward the outside O. A first auxiliary member 5A and a second auxiliary member 5B are arranged on the inner side I of the panel member 2 as auxiliary members 5. The first auxiliary member 5A and the second auxiliary member 5B are integrated with the panel member 2.

[0241] For example, when the panel component 2 is a door outer panel, the first auxiliary component 5A is a door inner panel. The side edge of the first auxiliary component 5A (door inner panel) is joined to the side edge of the panel component 2 (door outer panel) by welding and mechanical fastening. Thus, the first auxiliary component 5A is integrated with the panel component 2. And, in this case, the second auxiliary component 5B is a longitudinal door anti-collision beam. Both ends of the second auxiliary component 5B are fixed to the joint between the first auxiliary component 5A and the panel component 2. Thus, the second auxiliary component 5B is integrated with the panel component 2.

[0242] The reinforcement structure 1 of the present embodiment includes a first wire 3A and a second wire 3B as the wire 3. In the cross section of the panel component 2, the first wire 3A is arranged at a position close to the first side edge 22A of the panel component 2, and the second wire 3B is arranged at a position close to the second side edge 22B of the panel component 2. The length of the first wire 3A is different from the length of the second wire 3B. However, the length of the first wire 3A may be the same as the length of the second wire 3B.

[0243] The first end 31 of the first wire 3A is joined to the first position 211 of the panel body 21 (the panel body of the door outer panel). The second end 32 of the first wire 3A is joined to the second auxiliary component 5B (the door anti-collision beam). On this basis, the first wire 3A is stretched from the first position 211 to the second auxiliary component 5B.

[0244] In addition, the first end 31 of the second wire 3B is joined to the second position 212 of the panel body 21 (the panel body of the door outer panel). The second end 32 of the second wire 3B is joined to the second auxiliary component 5B (the door anti-collision beam). On this basis, the second wire 3B is stretched from the second position 212 to the second auxiliary component 5B.

[0245] The method of joining the wires 3A, 3B to the second auxiliary member 5B is bonding using an adhesive. This is because it is simple. However, the joining method may also be welding or mechanical fastening.

[0246] In this case, the first wire 3A extends in a straight line between the first position 211 and the second auxiliary component 5B. Furthermore, the first wire 3A extending between the first position 211 and the second auxiliary component 5B is separated from the inner surface 21a of the panel main body 21. In addition, the second wire 3B extends in a straight line between the second position 212 and the second auxiliary component 5B. Furthermore, the second wire 3B extending between the second position 212 and the second auxiliary component 5B is separated from the inner surface 21a of the panel main body 21.

[0247] In the reinforcement structure 1 of the present embodiment, when a load F is applied to the panel main body 21, similarly to the first embodiment, a tension T is generated in each wire 3A, 3B, and the first position 211 and the second position 212 of the panel main body 21 receive a reaction force of the tension T from each wire 3A, 3B. Thus, the deformation of the first position 211 and the second position 212 of the panel main body 21 is suppressed. In the panel main body 21, by suppressing the deformation of the first position 211 and the second position 212, the deformation of the first area A1 and the second area A2 is suppressed. In other words, the deformation of the outward deformation area is suppressed. Thus, in the panel main body 21, the deformation of the load assumption point to which the load F is applied is suppressed.

[0248] Therefore, according to the reinforcement structure 1 of this embodiment, it is possible to achieve the same effects as those of the first embodiment.

[0249] In the present embodiment, the first wire 3A is provided to suppress the deformation of the first position 211 of the panel main body 21, and the second wire 3B is provided to suppress the deformation of the second position 212 of the panel main body 21. However, only one of the first wire 3A and the second wire 3B may be provided. In other words, only the first wire 3A may be provided, or only the second wire 3B may be provided. This is because, in the panel main body 21, as long as the deformation of either the first position 211 or the second position 212 is suppressed, the deformation of the load assumption point to which the load F is applied will be suppressed to some extent.

[0250] [14th embodiment]

[0251] Fig.23 1 is a diagram showing a reinforcement structure 1 of a panel member 2 according to a fourteenth embodiment. Fig.23 2 shows a cross-sectional view of the reinforcing structure 1 when the panel member 2 is cut along a plane perpendicular to the X direction. The reinforcing structure 1 of the fourteenth embodiment is a modified version of the reinforcing structure 1 of the thirteenth embodiment. The following mainly describes the differences from the thirteenth embodiment.

[0252] In the reinforcement structure 1 of the present embodiment, the first end 31 of the first wire 3A is joined to the first position 211 of the panel body 21 (the panel body of the door outer panel). The second end 32 of the first wire 3A is joined to the first auxiliary component 5A (the door inner panel). On this basis, the first wire 3A is stretched from the first position 211 to the first auxiliary component 5A.

[0253] In addition, the first end 31 of the second wire 3B is joined to the second position 212 of the panel body 21 (the panel body of the door outer panel). The second end 32 of the second wire 3B is joined to the first auxiliary component 5A (the door inner panel). On this basis, the second wire 3B is stretched from the second position 212 to the first auxiliary component 5A.

[0254] The method of joining the wires 3A, 3B to the first auxiliary member 5A is bonding using an adhesive. This is because it is simple. However, the bonding method may also be welding or mechanical fastening.

[0255] In this case, the first wire 3A extends in a straight line between the first position 211 and the first auxiliary component 5A. Furthermore, the first wire 3A extending between the first position 211 and the first auxiliary component 5A is separated from the inner surface 21a of the panel main body 21. In addition, the second wire 3B extends in a straight line between the second position 212 and the first auxiliary component 5A. Furthermore, the second wire 3B extending between the second position 212 and the first auxiliary component 5A is separated from the inner surface 21a of the panel main body 21.

[0256] According to the reinforcement structure 1 of this embodiment, it is possible to achieve the same effects as those of the thirteenth embodiment.

[0257] [15th embodiment]

[0258] Fig.24 1 is a diagram showing a reinforcement structure 1 of a panel member 2 according to a fifteenth embodiment. Fig.24 2 shows a cross-sectional view of the reinforcing structure 1 when the panel member 2 is cut along a plane perpendicular to the X direction. The reinforcing structure 1 of the fifteenth embodiment is a modified version of the reinforcing structure 1 of the thirteenth embodiment. The following mainly describes the differences from the thirteenth embodiment.

[0259] In the reinforcement structure 1 of the present embodiment, the panel member 2 is flat over the entire area. Therefore, the panel main body 21 is flat. Furthermore, the first end 31 of the first wire 3A is joined to the first position 211 of the panel main body 21. The first end 31 of the second wire 3B is joined to the second position 212 of the panel main body 21. The second end 32 of each of the first wire 3A and the second wire 3B is joined to the second auxiliary member 5B.

[0260] The reinforcement structure 1 of this embodiment can also produce the same effects as those of the thirteenth embodiment.

[0261] [Sixteenth embodiment]

[0262] Fig.25 1 is a diagram showing a reinforcement structure 1 of a panel member 2 according to a sixteenth embodiment. Fig.25 2 shows a cross-sectional view of the reinforcing structure 1 when the panel member 2 is cut along a plane perpendicular to the X direction. The reinforcing structure 1 of the sixteenth embodiment is a modified version of the reinforcing structure 1 of the fourteenth embodiment. The following mainly describes the differences from the fourteenth embodiment.

[0263] In the reinforcement structure 1 of the present embodiment, the panel member 2 is flat over the entire area. Therefore, the panel main body 21 is flat. Furthermore, the first end 31 of the first wire 3A is joined to the first position 211 of the panel main body 21. The first end 31 of the second wire 3B is joined to the second position 212 of the panel main body 21. The second end 32 of each of the first wire 3A and the second wire 3B is joined to the bottom of the first auxiliary member 5A.

[0264] The reinforcement structure 1 of this embodiment can also produce the same effects as those of the fourteenth embodiment.

[0265] [Seventeenth embodiment]

[0266] Fig.26 1F is a diagram showing a reinforcement structure 1F of a panel member 2 according to a seventeenth embodiment. Fig.26 2 shows a cross-sectional view of the reinforcing structure 1F when the panel member 2 is cut along a plane perpendicular to the X direction. The reinforcing structure 1F of the seventeenth embodiment is a modified version of the reinforcing structure 1 of the fourteenth embodiment. The following mainly describes the differences from the fourteenth embodiment.

[0267] The reinforcement structure 1F of the present embodiment includes the first auxiliary member 5A (door inner panel) as the auxiliary member 5 , but does not include the second auxiliary member 5B (door anti-collision beam).

[0268] In the reinforcement structure 1F of the present embodiment, the number of the first wires 3A is 5. The number of the second wires 3B is 5. That is, the total number of the wires 3 is 10. The length of the first wire 3A is the same as the length of the second wire 3B. When viewed along the X direction, the first wire 3A and the second wire 3B intersect. The five first wires 3A are arranged horizontally in the X direction at equal intervals. The five second wires 3B are also arranged horizontally in the X direction at equal intervals.

[0269] The first end 31 of the first wire 3A is joined to the first position 211 of the panel body 21. The first end 31 of the second wire 3B is joined to the second position 212 of the panel body 21. The second end 32 of each of the first wire 3A and the second wire 3B is joined to the bottom of the first auxiliary member 5A.

[0270] The reinforcement structure 1F of this embodiment can also produce the same effects as those of the fourteenth embodiment.

[0271] (4th weighted test)

[0272] Fig. 27 17 is a diagram showing the results of the fourth load test related to the reinforcement structure of the seventeenth embodiment. Fig. 27 The relationship between the weight per unit area of ​​the panel member and the deflection amount of the panel member is shown in . As in the first load test, the deflection amount refers to the displacement amount of the portion (load assumption point) to which the load is applied in the panel body.

[0273] In the fourth load test, a panel component 2 having the reinforcement structure 1F of the seventeenth embodiment was prepared. In addition, for comparison, a panel component 2 having a non-reinforcement structure 1G without a wire was prepared. Each panel component 2 was joined to the first auxiliary component 5A. A load of 90N was applied to each panel component 2, and the deflection amount was examined.

[0274] The main conditions of the reinforced structure 1F and the non-reinforced structure 1G are shown below.

[0275] The material of the panel component 2 is set to be JSC270D (Japan Iron and Steel Federation Standard (JFS)) for automobile cold-rolled steel sheet. The panel component 2 has a square shape in a top view when viewed from the Z direction, and the length of each side constituting its outline is set to 400 mm. The height from the bottom of the first auxiliary component 5A to the joint between the first end 31 of the first wire 3A and the second position 212 of the panel main body 21 is set to 100 mm. The material of the first auxiliary component 5A is set to be the same as the material of the panel component 2.

[0276] The material of the wire material 3 is set to general structural rolled steel material SS400 (JIS G 3101). The wire material 3 is set to be a single wire, and its diameter is set to be 2.0 mm. The length of the wire material 3 is set to be 275 mm.

[0277] As the adhesive 4 for bonding the wire material 3 and the panel member 2 , low-odor acrylic adhesive Y-600 manufactured by CEMEDINE Co., Ltd. was used.

[0278] In the reinforced structure 1F, the plate thickness t of the panel member 2 was set to 0.4 mm. As the non-reinforced structure 1G, four panel members 2 with different plate thicknesses t were tested. The plate thicknesses t of the four panel members 2 were set to 0.4 mm, 0.5 mm, 0.6 mm, and 0.7 mm, respectively. The plate thickness of the first auxiliary member 5A was set to 0.75 mm.

[0279] like Fig. 27 As shown, when comparing panel components 2 having the same plate thickness t of 0.4 mm, the deflection amount of the panel component 2 of the reinforced structure 1F is significantly smaller than the deflection amount of the panel component 2 of the non-reinforced structure 1G. Compared with the non-reinforced structure 1G consisting of only the panel component 2 with the plate thickness t increased to more than 0.5 mm, the weight per unit area of ​​the panel component 2 of the reinforced structure 1F is significantly reduced.

[0280] The embodiments of the present disclosure have been described above. However, the above embodiments are merely examples for implementing the present disclosure. Therefore, the present disclosure is not limited to the above embodiments, and the above embodiments can be appropriately modified and implemented within the scope of the present disclosure.

[0281] For example, the wire 3 may also be a CFRP wire. CFRP may be either a thermosetting CFRP or a thermoplastic CFRP. However, the heat resistance of the CFRP wire is not high. In addition, when a CFRP wire is used as the wire 3, a thermal expansion difference may occur between the wire 3 and the panel main body 21. Therefore, when the wire 3 is a CFRP wire, it is preferred to perform the joining of the panel main body 21 and the wire 3 after the heating treatment.

[0282] Description of Reference Numerals

[0283] 1. 1A, 1B, 1D, 1F, reinforcement structure; 2. panel component; 21. panel main body; 21a, inner surface of panel main body; 211, 1st position; 212, 2nd position; A, outward deformation area; A1, 1st area; A2, 2nd area; 25, receiving part; 3. 3A, 3B, 3C, wire; 31, 1st end; 32, 2nd end; P1, 1st load assumption point; P2, 2nd load assumption point; P3, 3rd load assumption point; P4, 4th load assumption point; 4. adhesive; 5. auxiliary component; 5A, 1st auxiliary component; 5B, 2nd auxiliary component.

Claims

1. A reinforcement structure of a panel component, wherein: The reinforcement structure of the panel component has: a panel member including a panel main body portion bent to bulge outward; and a wire having a first end and a second end, the first end being joined to the inner surface of a first position in the panel body, and the second end being joined to the inner surface of a second position in the panel body, the wire being stretched from the first position to the second position, The panel body comprises: Load assumption points, where loads are assumed to be applied from the outside; and The first region and the second region are displaced in a direction opposite to the direction of the load and away from the load assumption point when a load is applied to the load assumption point from the outside in the absence of the wire rod, The second region is located on the opposite side of the first region with respect to the assumed load point. The first position is set in the first area, and the second position is set in the second area.

2. A reinforcement structure of a panel component, wherein: The reinforcement structure of the panel component has: A panel member including a flat panel main body portion or a panel main body portion bent to bulge outward; an auxiliary component, which is arranged on the inner side of the panel component and is integrated with the panel component; as well as a wire having a first end and a second end, wherein the first end is joined to the inner surface of a first position in the panel main body, and the second end is joined to the auxiliary component, and the wire is stretched from the first position to the auxiliary component, The panel body comprises: Load assumption point, where the load is assumed to be applied from the outside; as well as The first region is displaced in a direction opposite to the direction of the load and away from the load assumption point when a load is applied to the load assumption point from the outside in the absence of the wire rod, The first position is set in the first area.

3. A reinforcement structure of a panel component, wherein: The reinforcement structure of the panel component has: A panel member including a flat panel main body portion or a panel main body portion bent to bulge outward; a receiving portion protruding from an inner surface of the panel main body; as well as a wire having a first end and a second end, wherein the first end is joined to the inner surface of a first position in the panel main body, and the second end is joined to the inner surface of a second position in the panel main body located on the opposite side of the receiving portion from the first position, wherein the wire is stretched from the first position to the second position by means of the receiving portion, The panel body comprises: Load assumption point, where the load is assumed to be applied from the outside; as well as The first region and the second region are displaced in a direction opposite to the direction of the load and away from the load assumption point when a load is applied to the load assumption point from the outside in the absence of the wire rod, The second region is located on the opposite side of the first region with respect to the assumed load point. The first position is set in the first area, and the second position is set in the second area. The receiving portion is provided between the first region and the second region.

4. The reinforcement structure of a panel member according to any one of claims 1 to 3, wherein: The panel member is made of metal.

5. The reinforcement structure of the panel member according to claim 4, wherein: The panel member is made of steel.

6. The reinforcement structure of a panel member according to any one of claims 1 to 3, wherein: The wire material is a metal wire.

7. The reinforcement structure of the panel member according to claim 6, wherein: The wire material is a steel wire.

8. The reinforcement structure of the panel member according to claim 4, wherein: The material of the panel component is the same as that of the wire.

9. The reinforcement structure of the panel member according to claim 6, wherein: The material of the panel component is the same as that of the wire.

10. The reinforcement structure of a panel member according to any one of claims 1 to 3, wherein: The wire material is a CFRP wire.

11. The reinforcement structure of a panel member according to any one of claims 1 to 3, wherein: The panel component is an outer panel for an automobile.

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