WO2023149083A1 - Vehicle structure comprising resin panel and metallic fastener having bolt insertion part - Google Patents

Abstract

When mounting a resin panel and another component such as a damper stay, the present invention reduces the number of manufacturing steps by embedding a metallic fastener in the resin panel by insert moulding. A vehicle structure (1) comprises: a metallic fastener (20) having a bolt insertion part (20A); and a resin panel (10). The metallic fastener (20) is embedded in the resin panel (10) by insert-moulding. The resin panel (10) is provided with a hole (10A) formed at a position corresponding to the bolt insertion part (20A).

Description

A vehicle structure comprising a metal fastener having a bolt insert and a resin panel

The present invention relates to a vehicle structure including a metal fastener having a bolt insertion portion and a resin panel, and a manufacturing method thereof.

Composite materials that use reinforcing fibers as reinforcing materials have high tensile strength and tensile modulus, and have excellent dimensional stability due to their small coefficient of linear expansion. It also has excellent shielding properties and X-ray transparency. Composite materials using reinforcing fibers as reinforcing materials are widely used in automobiles, sports/leisure, aerospace, and general industrial applications.
Patent Literature 1 describes a vehicle resin back door structure in which the rear glass can be replaced while the load from the damper is removed when the rear glass is replaced.
Patent Document 2 describes a resin molded product in which a metal plate is used as an insert member and the metal plate is embedded and integrated, and a method of insert molding the molded product. It is described that the metal plate embedded as the insert member can suppress the occurrence of sink marks in the resin ribs.
US Pat. No. 5,300,009 describes a hybrid tailgate or rear door for vehicles, particularly automobiles, such as passenger cars, comprising a thermoplastic internal structure and composite stiffeners.
In Patent Document 4, a heat-shrinkable container (nut), a fiber-reinforced plastic surrounding the container, and a fiber-reinforced plastic disposed between the container and the fiber-reinforced plastic due to the heat shrinkage of the container. A fiber-reinforced plastic molding is described that has a relief layer that relieves the tensile stress acting on the fiber. The relaxation layer is formed by evenly applying acrylic-modified silicone resin to the nut and curing the resin.
Patent Literature 5 describes an SMC (sheet molding compound) molded product having a uniform thickness and having a plate-like reinforcing member integrally formed on one side thereof. This molded product has a uniform thickness space corresponding to the thickness of this mold and the plate-shaped molded product by disposing the plate-shaped reinforcing member in a recess corresponding to the thickness of the plate-shaped reinforcing member formed in one of the molds. The sheet-shaped molding material is molded under heat and pressure using another mold designed to form a plate-shaped molded article and a plate-shaped reinforcing member.

JP 2014-76707 A JP-A-2003-251633 Japanese Patent Application Publication No. 2019-536688 Japanese Patent Application Laid-Open No. 2009-286070 Japanese Patent Application Laid-Open No. 2001-105506

However, in the invention described in Patent Document 1, when attaching the damper stay to the door panel, bolts are inserted into the bracket on the door panel side, but the bracket is adhered to the door panel with an adhesive, which requires a large number of man-hours for manufacturing. Too much. Similarly, the door panels described in Patent Literatures 2 and 3 also require fastening parts for attachment separately in order to be attached to other parts such as a damper stay, which also increases the number of manufacturing man-hours.
In the invention described in Patent Document 4, the core material needs to be formed into a predetermined shape in order to insert-mold the nut, and there is no degree of freedom in design.
In Patent Document 5, it is necessary to form a depression corresponding to the thickness of the plate-like reinforcing member in advance in the mold for disposing the plate-like reinforcing member, which increases the number of manufacturing steps.
An object of the present invention is to provide a vehicle structure that can reduce manufacturing man-hours by embedding a metal fastener having a bolt insertion part in a resin panel by insert molding when attaching a resin panel and other parts such as a damper stay. It is to provide the body.

In order to solve the above problems, the present invention provides the following means.

<1>
A vehicle structure comprising a metal fastener having a bolt insertion portion and a resin panel,
The metal fastener is embedded in the resin panel by insert molding,
The vehicle structure, wherein the resin panel is provided with a hole at a position corresponding to the bolt insertion portion.
<2>
The resin panel is
a fiber-reinforced resin member A containing reinforcing fibers a having a weight-average fiber length of less than 3 mm;
a fiber-reinforced resin member B containing reinforcing fibers b having a weight average fiber length of 3 mm or more;
The vehicle structure according to <1>.
<3>
The vehicle structure according to <2>, wherein the fiber-reinforced resin member A has the hole.
<4>
The vehicle structure according to <2> or <3>, wherein the metal fastener is covered with the fiber-reinforced resin member A.
<5>
The vehicle structure according to any one of <2> to <4>, wherein the fiber reinforced resin member B is in contact with the fiber reinforced resin member A.
<6>
The vehicle structure according to <4> or <5>, wherein the fiber-reinforced resin member B is not in contact with the metal fastener.
<7>
The resin contained in the fiber-reinforced resin member A is a thermoplastic resin or a thermosetting resin,
The vehicle structure according to any one of <2> to <6>, wherein the resin contained in the fiber-reinforced resin member B is a thermoplastic resin or a thermosetting resin.
<8>
The fiber reinforced resin member A is a glass fiber reinforced resin member A _GF containing glass fibers having a weight average fiber length of less than 3 mm,
The fiber reinforced resin member B is a carbon fiber reinforced resin member B _CF containing carbon fibers having a weight average fiber length of 3 mm or more, or a glass fiber reinforced resin member B _GF containing glass fibers having a weight average fiber length of 3 mm or more.
The vehicle structure according to any one of <2> to <7>.
<9>
The reinforced fiber resin member B includes a carbon fiber reinforced resin member B _CF containing carbon fibers having a weight average fiber length of 3 mm or more, and a glass fiber reinforced resin member B _GF containing glass fibers having a weight average fiber length of 3 mm or more,
The metal fastener is covered with a glass fiber reinforced resin member _AGF containing glass fibers having a weight average fiber length of less than 3 mm,
The vehicle structure according to <7>, wherein the glass fiber reinforced resin member _AGF is in contact with the carbon fiber reinforced resin member _BCF .
<10>
The vehicle structure according to <9>, wherein the glass fiber reinforced resin member A _GF , the carbon fiber reinforced resin member B _CF , and the glass fiber reinforced resin member B _GF contain a thermoplastic resin.
<11>
The vehicle structure according to <9>, wherein the carbon fiber reinforced resin member B _CF and the glass fiber reinforced resin member B _GF are molded from a sheet molding compound.
<12>
The vehicle structure according to <2>, wherein the fiber-reinforced resin member B has the hole.
<13>
The vehicle structure according to <2>, wherein the metal fastener is in contact with the fiber-reinforced resin member B.
<14>
The resin panel has a fiber reinforced resin member B,
The fiber reinforced resin member B is
Reinforcing fiber b having a weight average fiber length of 3 mm or more, and a thermoplastic resin,
The vehicle structure according to <1>, wherein the metal fastener is covered with the fiber-reinforced resin member B.
<15>
The reinforced resin member B includes a glass fiber reinforced resin member B _GF ,
The glass fiber reinforced resin member B _GF is
Glass fiber with a weight average fiber length of 3 mm or more, and a thermoplastic resin,
The vehicle structure according to <14>, wherein the metal fastener is covered with the glass fiber reinforced resin member _BGF .
<16>
The resin panel has a fiber reinforced resin member B,
The fiber reinforced resin member B includes a glass fiber reinforced resin member B _GF containing glass fibers having a weight average fiber length of 3 mm or more,
The vehicle structure according to <1>, wherein the glass fiber reinforced resin member _BGF is formed by molding a sheet molding compound.
<17>
The fiber reinforced resin member B includes a carbon fiber reinforced resin member B _CF containing carbon fibers having a weight average fiber length of 3 mm or more, and a glass fiber reinforced resin member B _GF containing glass fibers having a weight average fiber length of 3 mm or more,
The carbon fiber reinforced resin member _BCF is formed by molding a sheet molding compound,
The vehicle structure according to <16>, wherein the metal fastener is covered with the glass fiber reinforced resin member _BGF or the carbon fiber reinforced resin member _BCF .
<18>
The vehicle structure according to any one of <1> to <17>, wherein the metal fastener is L-shaped or I-shaped.
<19>
The resin panel is a door panel constituting a vehicle back door, and the vehicle structure is a vehicle resin back door structure.
The vehicle structure according to any one of <1> to <18>.
<20>
The vehicle back door includes a damper stay,
The door panel and the damper stay are fastened and fixed by a bolt inserted into the bolt insertion portion,
The vehicle structure according to <19>.
<21>
The vehicle structure according to <19> or <20>, wherein the door panel includes a rear glass.
<22>
The vehicle structure according to any one of <2> to <21>, wherein the resin panel has a rib within 30 mm from the metal fastener.
<23>
The vehicle structure according to any one of <2> to <22>, wherein the resin panel has an uneven thickness portion within 30 mm from the metal fastener.
<24>
The material Bm for producing the fiber-reinforced resin member B and the metal fastener are placed in a mold in advance, the material Am for producing the fiber-reinforced resin member A is injected into the mold, and the fiber The method for manufacturing a vehicle structure according to any one of <2> to <13>, wherein the reinforced resin member A, the fiber reinforced resin member B, and the metal fastener are integrally molded.
<25>
The method of manufacturing a vehicle structure according to <24>, wherein the hole is provided by secondary processing after integrally molding the fiber-reinforced resin member A, the fiber-reinforced resin member B, and the metal fastener.
<26>
The method for manufacturing a vehicle structure according to <24>, wherein the holes are provided at the same time when the fiber-reinforced resin member A, the fiber-reinforced resin member B, and the metal fastener are integrally molded.
<27>
With the metal fastener sandwiched between the plurality of materials Bm for creating the fiber reinforced resin member B, the plurality of materials Bm and the fastener are placed in a mold, and the fiber reinforced resin member B , and the method of manufacturing a vehicle structure according to any one of <14> to <17>, wherein the metal fastener is integrally molded.

In the vehicle structure of the present invention, by embedding metal fasteners in resin panels by insert molding, fasteners for attaching resin panels to other parts such as damper stays can be easily provided.

FIG. 2 is a schematic diagram showing a resin back door structure for a vehicle in which a reinforcing bracket is fastened to a resin back door panel; FIG. 2 is a schematic diagram showing a resin back door structure for a vehicle in which a reinforcing bracket is fastened to a resin back door panel; FIG. 5 is a schematic diagram showing the location of the AA cross section for explaining the damper stay mounting position in FIG. 4; FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3; 1 is a cross-sectional view showing an embodiment of a vehicle structure; FIG. FIG. 2 is a schematic diagram of a vehicle structure in which a metal fastener is embedded in a resin panel by insert molding, before bolts are attached; 1 is a cross-sectional view showing an embodiment of a vehicle structure; FIG. FIG. 4 is a schematic diagram of a vehicle structure in which a metal fastener is embedded in a resin panel by insert molding, after bolts are attached. 1 is a schematic diagram of a vehicle structure of the present invention comprising metal fasteners with bolt inserts and resin panels; FIG. The metal fastener is embedded in the resin panel by insert molding, and the resin panel is provided with a hole h1 (601) at a position corresponding to the bolt insertion portion. Before the bolt is inserted. The schematic diagram of the structure around the preferable hole h1. It has a structure in which the resin panel is not involved in the fastening part as much as possible. Schematic diagram illustrating sandwiching and molding a metal fastener 801 using a material Bm (sheet molding compound, 802). It is a mimetic diagram showing a back door for vehicles. FIG. 4 is a schematic diagram showing part of the side frame to which the damper stay is attached; 11 is a cross-sectional view taken along line XI-XI of FIG. 10; FIG. FIG. 4 is a cross-sectional view of a side frame using a metal fastener 20B having an L-shaped cross section; It is a schematic diagram which shows the manufacturing method of a vehicle structure. It is a schematic diagram which shows the manufacturing method of a vehicle structure. It is a schematic diagram which shows the manufacturing method of a vehicle structure. It is a schematic diagram which shows the manufacturing method of a vehicle structure. It is a schematic diagram which shows the modification of a vehicle structure. It is a schematic diagram which shows the manufacturing method of a vehicle structure.

The present invention will be described in detail below.
The present invention provides a vehicle structure including a metal fastener having a bolt insertion portion and a resin panel, wherein the metal fastener is embedded in the resin panel by insert molding, and is inserted into the resin panel. is a vehicle structure having a hole h1 at a position corresponding to the bolt insertion portion. Preferably, the resin panel has a fiber-reinforced resin member A and a fiber-reinforced resin member B.

[Reinforcing fiber]
In this specification, the reinforcing fiber is preferably at least one selected from the group consisting of carbon fiber, aramid fiber and glass fiber. More preferably, the reinforcing fibers are carbon fibers or glass fibers.
More specifically, when the fiber-reinforced resin member A is used, the reinforcing fibers contained therein are preferably carbon fibers or glass fibers. When the fiber-reinforced resin member B is used, the reinforcing fibers contained therein are preferably carbon fibers or glass fibers.

[Carbon fiber]
1. Carbon fibers in general Carbon fibers used in the present invention generally include polyacrylonitrile (PAN)-based carbon fibers, petroleum/coal pitch-based carbon fibers, rayon-based carbon fibers, cellulose-based carbon fibers, lignin-based carbon fibers, and phenol-based carbon fibers. Carbon fibers and the like are known, and any of these carbon fibers can be suitably used in the present invention. Among them, polyacrylonitrile (PAN)-based carbon fibers are preferably used in the present invention because of their excellent tensile strength. As the PAN-based carbon fiber, for example, carbon fiber “Tenax” (registered trademark) STS40-24KS (average fiber diameter 7 μm) manufactured by Teijin Limited can be used.

2. Sizing Agent for Carbon Fiber The carbon fiber used in the present invention may have a sizing agent attached to its surface. When using carbon fibers to which a sizing agent is attached, the type of the sizing agent is appropriately selected according to the type of carbon fiber and the type of thermoplastic resin used for the fiber-reinforced resin member B or the fiber-reinforced resin member A. It can be done, and is not particularly limited.

3. Fiber diameter of carbon fiber The fiber diameter of the carbon fiber single yarn (generally, the single yarn is sometimes called a filament) used in the present invention may be appropriately determined according to the type of carbon fiber, and is particularly limited. not to be The average fiber diameter is generally preferably in the range of 3 μm to 50 μm, more preferably in the range of 4 μm to 12 μm, even more preferably in the range of 5 μm to 8 μm. When the carbon fiber is in the form of a fiber bundle, it refers to the diameter of the carbon fiber (single filament) forming the fiber bundle, not the diameter of the fiber bundle. The average fiber diameter of carbon fibers can be measured, for example, by the method described in JIS R7607:2000.

[Glass fiber]
A case where the reinforcing fibers used in the present invention are glass fibers will be described.
1. Glass fiber in general The glass fiber used in the present invention may be any glass fiber generally called glass fiber. The glass composition of A glass, C glass, E glass and the like is not particularly limited, and may contain components such as TiO ₂ , SO ₃ and P ₂ O ₅ depending on the case.
As the glass fiber, for example, glass fiber E-glass RS240QR-483 (count: 2400 g/1000 m) manufactured by Nitto Boseki Co., Ltd. can be used.

2. Sizing Agent for Glass Fiber The glass fiber used in the present invention may have a sizing agent attached to its surface. When using glass fibers to which a sizing agent is attached, the type of the sizing agent can be appropriately selected according to the type of glass fiber and the type of resin contained in the resin panel, and is not particularly limited. not something. Glass fibers pretreated with conventionally known coupling agents such as organic silane-based compounds, organic titanium-based compounds, organic borane-based compounds and epoxy-based compounds can preferably be used.

3. Fiber Diameter of Glass Fiber The average fiber diameter of the glass fiber is preferably 1 μm to 50 μm, more preferably 5 μm to 20 μm. If the average fiber diameter is too small, it becomes difficult to impregnate the fibers with the thermoplastic resin, and if it is too large, moldability and workability are adversely affected.

[Fiber length of reinforcing fiber contained in fiber-reinforced resin member A]
The weight-average fiber length of the reinforcing fibers a contained in the fiber-reinforced resin member A is preferably less than 3 mm. More preferably, the weight-average fiber length of the reinforcing fibers contained in the fiber-reinforced resin member A is 0.01 mm or more and less than 3 mm.
The weight-average fiber length Lwa of the reinforcing fibers a is not particularly limited, but the lower limit is preferably 0.01 mm or longer, more preferably 0.05 mm or longer, and even more preferably 0.1 mm or longer. When the weight average fiber length Lwa of the reinforcing fibers a is 0.01 mm or more, the mechanical strength is ensured. On the other hand, the upper limit of the weight average fiber length Lwa of the reinforcing fibers a is preferably less than 3 mm, more preferably less than 2 mm, and even more preferably less than 1 mm.
If Lwa is 1.0 mm or less, it is easy to manufacture the fiber-reinforced resin member A by injection. In the case of injection, a kneading process is included, and carbon fibers that have undergone a sufficient kneading process generally have a weight-average fiber length of less than 1 mm.
The weight-average fiber length Lwa of the reinforcing fibers a is obtained by the formulas (1) and (2) described below. The weight average fiber length of the reinforcing fibers a is preferably shorter than the weight average fiber length of the reinforcing fibers b.

[Fiber length of reinforcing fiber contained in fiber-reinforced resin member B]
The weight-average fiber length of the reinforcing fibers b contained in the fiber-reinforced resin member B is preferably 3 mm or more. More preferably, the weight-average fiber length of the reinforcing fibers b contained in the fiber-reinforced resin member B is 3 mm or more and 100 mm or less. The weight average fiber length of the reinforcing fibers b is preferably longer than the weight average fiber length of the reinforcing fibers a.
Reinforcing fibers b having different fiber lengths may be used together. In other words, the reinforcing fiber b used in the present invention may have a single peak in the weight-average fiber length distribution, or may have a plurality of peaks.
The weight average fiber length Lwb of the reinforcing fibers b is more preferably 3 mm or more and 80 mm or less, and even more preferably 5 mm or more and 60 mm or less. If Lwb is 100 mm or less, the fluidity of the material is less likely to decrease when the fiber-reinforced resin member B is manufactured by press molding, and the fiber-reinforced resin member B can be easily formed into a desired shape. Moreover, when Lwb is 1 mm or more, the mechanical strength of the resulting fiber-reinforced resin member is less likely to decrease, which is preferable.
The weight average fiber length and number average fiber length of the reinforcing fibers b can be measured in the same manner as in formulas (1) and (2) described below.

[Number average fiber length Ln and weight average fiber length Lw]
In general, when the fiber length of each reinforcing fiber is Li, the number average fiber length Ln and the weight average fiber length Lw are obtained by the following equations (1) and (2). The units of the number average fiber length Ln and the weight average fiber length Lw are mm.

Here, "I" indicates the number of reinforcing fibers measured.
When the fiber length is constant, the number average fiber length and the weight average fiber length have the same value. Reinforcing fibers can be extracted from a resin panel by, for example, performing heat treatment at 500° C. for about 1 hour and removing the resin in a furnace.
The number-average fiber length Ln and the weight-average fiber length Lw are obtained, for example, by measuring the fiber lengths L ₁ to L ₁₀₀ of 100 fibers (I=100) randomly extracted from the door inner panel using a vernier caliper or the like in units of 1 mm. can be measured to and determined based on equations (1) and (2).
If short fibers that cannot be measured with a vernier caliper are included, after removing the resin, the obtained reinforcing fibers are put into water containing a surfactant and thoroughly stirred by ultrasonic vibration, and the stirred reinforcing fibers Randomly sample the dispersion liquid with a measuring spoon to obtain an evaluation sample, and measure the length of 3000 (I = 3000) reinforcing fibers with an image analyzer Luzex AP manufactured by Nireco. Using the measured values L ₁ to L ₃₀₀₀ of the fiber lengths, the number average fiber length Ln and the weight average fiber length Lw can be obtained in the same manner as in the above formulas (1) and (2).

[Volume ratio of reinforcing fibers in fiber-reinforced resin member A and fiber-reinforced resin member B]
For each of the fiber reinforced resin member A and the fiber reinforced resin member B, the reinforcing fiber volume ratio (Vf) can be obtained by the following formula (3).
Although there is no particular limitation on the reinforcing fiber volume ratio, the reinforcing fiber volume ratio (Vf) is preferably 10 to 60 vol%, more preferably 20 to 50 vol%, and even more preferably 25 to 45 vol%. .
Reinforcing fiber volume ratio (Vf) = 100 × reinforcing fiber volume / (reinforcing fiber volume + resin volume) Equation (3)

In the present invention, it is preferable for the manufacturing process that the reinforcing fiber volume ratio Vfa of the fiber reinforced resin member A and the carbon fiber volume ratio Vfb of the fiber reinforced resin member B satisfy the relationship Vfb≧Vfa. For example, if a material obtained by crushing offcuts collected from the manufacturing process or product is used as the fiber reinforced resin member A, and after crushing the offcuts, a thermoplastic resin is further added to manufacture the fiber reinforced resin member A. In many cases, Vfb>Vfa. That is, if a manufacturing method that satisfies Vfb≧Vfa is adopted, scraps remaining after cutting out the fiber-reinforced resin member B can be efficiently used, and the product can be easily recycled.
Vfb is preferably 20 to 45 Vol%, more preferably 25 to 40 Vol%.
Vfa is preferably 1 to 40 Vol%, more preferably 5 to 30 Vol%, still more preferably 10 to 25 Vol%.

[Analysis of reinforcing fiber volume ratio (Vf)]
Although the analysis of the reinforcing fiber volume ratio is not limited, it is preferable to measure it as follows.
A sample is cut out from the resin panel, the resin is burned off in a furnace at 500° C. for 1 hour, and the mass of the sample before and after treatment is weighed to calculate the mass of the reinforcing fiber and the resin. Next, using the specific gravity of each component, the volume ratio of the reinforcing fiber and the resin is calculated.
Vf = 100 x reinforcing fiber volume/(reinforcing fiber volume + resin volume)

[resin]
The resin used for the resin panel may be thermosetting or thermoplastic.
1. 1. Thermoplastic Resin 1.1 Overview When the resin used is a thermoplastic resin, the type thereof is not particularly limited, and one having a desired softening point or melting point can be appropriately selected and used. As the thermoplastic resin, one having a softening point in the range of 180° C. to 350° C. is usually used, but the thermoplastic resin is not limited to this.
Thermoplastic resins include polyolefin resins, polystyrene resins, polyamide resins, polyester resins, polyacetal resins (polyoxymethylene resins), polycarbonate resins, (meth)acrylic resins, polyarylate resins, polyphenylene ether resins, polyimide resins, and polyether nitriles. Resins, phenoxy resins, polyphenylene sulfide resins, polysulfone resins, polyketone resins, polyetherketone resins, thermoplastic urethane resins, fluorine-based resins, and thermoplastic polybenzimidazole resins can be used.
The thermoplastic resin used in the resin panel of the present invention may be of only one type, or may be of two or more types. Examples of a mode in which two or more thermoplastic resins are used in combination include, for example, a mode in which thermoplastic resins having different softening points or melting points are used in combination, and a mode in which thermoplastic resins having different average molecular weights are used in combination. is possible, but not limited to this.
When using a thermoplastic resin, it is more preferable to use a polyolefin resin, and it is even more preferable to use a polypropylene resin.

1.2 Resins of Fiber Reinforced Resin Member A and Fiber Reinforced Resin Member B The resin contained in the fiber reinforced resin member A is preferably a thermoplastic resin. When the resin contained in the fiber-reinforced resin member B is a thermoplastic resin, it is more preferable that the resins contained in the fiber-reinforced resin members A and B are the same type of thermoplastic resin.
2. Thermosetting Resin The resin contained in the fiber-reinforced resin member B may be a thermosetting resin. In this case, the fiber-reinforced resin member B is preferably formed by molding a sheet molding compound (sometimes referred to as SMC) using reinforcing fibers. Due to its high formability, the sheet molding compound can be easily molded even into complex shapes. Sheet molding compounds have higher fluidity and formability than continuous fibers, and can easily form ribs and bosses.

[Material Am, Material Bm]
In this specification, the material before molding of the fiber reinforced resin member A used in the vehicle structure may be referred to as material Am, and the material before molding of the fiber reinforced resin member B may be referred to as material Bm. That is, a material containing reinforcing fibers a with a weight average fiber length of less than 3 mm may be called material Am, and a material containing reinforcing fibers b with a weight average fiber length of 3 mm or more may be called material Bm.

[Other agents]
In the resin used for the resin panel, various fibrous or non-fibrous fillers of organic fibers or inorganic fibers, flame retardants, UV-resistant agents, stabilizers, release agents, Additives such as pigments, softeners, plasticizers and surfactants may be included.

[Types and structures of metal fasteners]
The metal fastener used in the present invention is a metal fastener.
The shape of the metal fastener used in the present invention is not particularly limited. For example, the cross-sectional shape may be an L-shape or an I-shape. The metal fastener has a bolt insert.
An example of the vehicle structure of the present invention is shown in FIGS. 5A and 5B. In FIG. 5A, metal fasteners (503) are embedded in plastic panel 504 by insert molding. In FIG. 5B, bolt 505 fastens metal fastener 503 and bracket 502 . Thereby, for example, it becomes possible to join the damper stay and the resin panel. Reference numeral 506 is a nut for fastening the bolt. Preferably, the bolt 505 is inserted from the outside of the resin panel 504 and fastened to the nut 506 as shown in FIG. 5B. Also, as shown in FIG. 5A, the resin panel 504 may have ribs 501 .

[Metal fastener embedded in resin panel by insert molding]
The metal fastener 503 is embedded in the resin panel 504 by insert molding. Insert molding is a molding method in which resin is injected around a metal fastener inserted into a mold to integrate the metal fastener and the resin. There is no particular limitation on the insert molding method.

1. Insert Molding Using Injection As will be described later, it is preferable to place the material Bm and the metal fastener in advance in the molding die, and then inject the material Am into the molding die to put it into the molding die.

1.1 Location of Metal Fastener It is preferable that the metal fastener is covered with the fiber-reinforced resin member A. In this case, the metal fastener is placed in the mold in advance, the material Am is injected into the mold, the metal fastener is covered with the material Am, and the metal fastener is a fiber-reinforced resin member. covered by A. At this time, the fiber-reinforced resin member A, the fiber-reinforced resin member B, and the metal fastener are integrally molded.

Also, it is preferable that the fiber-reinforced resin member B is not in contact with the metal fastener. In this case, when performing insert molding, it is preferable that the material Bm and the metal fastener are placed in advance in the mold without contacting each other, and then the material Am is injected into the mold and put into the mold. The resin of the fiber-reinforced resin member A is a thermoplastic resin, and the metal fastener is covered with the fiber-reinforced resin member A by injecting the material Am. This manufacturing method leads to a reduction in manufacturing man-hours. Furthermore, by covering the metal fastener with the fiber-reinforced resin member A and not contacting the fiber-reinforced resin member B, welds caused by contact between the material Am and the material Bm do not exist around the metal fastener. It will be. In other words, it is more preferable that the metal fastener is covered with the fiber-reinforced resin member A and that there is no weld caused by the fiber-reinforced resin member A on the contact surface with the metal fastener. It is preferable that the fiber reinforced resin member B is in contact with the fiber reinforced resin member A when the fiber reinforced resin member B is not in contact with the metal fastener.

1.2 Preferred Embodiment 1
The fiber reinforced member A is a glass fiber reinforced member _AGF containing glass fibers having a weight average fiber length of less than 3 mm, and the fiber reinforced member B is a carbon fiber reinforced member containing carbon fibers having a weight average fiber length of 3 mm or more. It is preferably B _CF or a glass fiber reinforced member B _GF containing glass fibers having a weight average fiber length of 3 mm or more.
More preferably, the reinforcing fiber member B is a carbon fiber reinforced resin member B _CF containing carbon fibers having a weight average fiber length of 3 mm or more, and a glass fiber reinforced resin member B _GF containing glass fibers having a weight average fiber length of 3 mm or more. The metal fastener is covered with a glass fiber reinforced resin member _AGF containing glass fibers having a weight average fiber length of less than 3 mm, and the glass fiber reinforced resin member _AGF is in contact with the carbon fiber reinforced resin member _BCF . By using both the carbon fiber reinforced member _BCF and the glass fiber reinforced member _BGF , the carbon fiber reinforced resin member _BCF can be partially used. The place where the carbon fiber reinforced resin member _BCF is partially used is preferably the periphery of the hole h1, and is preferably used to reinforce the fastening.

1.3 Resin of Preferred Embodiment 1 The resin contained in the fiber-reinforced resin member A is a thermoplastic resin or a thermosetting resin, and the resin contained in the fiber-reinforced resin member B is a thermoplastic resin or a thermosetting resin. is preferred.
The resin contained in the glass fiber reinforced resin member A _GF , the carbon fiber reinforced resin member B _CF and the glass fiber reinforced resin member B _GF may be a thermoplastic resin.
While the glass fiber reinforced resin member _AGF is a thermoplastic resin, the carbon fiber reinforced resin member _BCF and the glass fiber reinforced resin member _BGF may be molded bodies using a sheet molding compound.

2. Insert Molding Using SMC As another method of insert molding, a sheet molding compound containing carbon fiber may be used as the material Bm, and the metal fastener may be covered at the same time as the material Bm is molded. In this case, it is not always necessary to use the fiber-reinforced resin member A.

2.2 Preferred configuration 2
The resin panel of the vehicle structure has a fiber reinforced resin member B, the fiber reinforced resin member B includes a glass fiber reinforced resin member B _GF , and the glass fiber reinforced resin member B _GF is formed by molding a sheet molding compound. is preferred.
More preferably, the fiber reinforced resin member B includes a carbon fiber reinforced resin member B _CF and a glass fiber reinforced resin member B _GF , and the carbon fiber reinforced resin member B _CF is formed by molding a sheet molding compound, and is a metal fastener. is preferably covered with a glass fiber reinforced resin member _BGF or a carbon fiber reinforced resin member _BCF . By covering the periphery of the metal fastener with the carbon fiber reinforced resin member _BCF and creating the other area with the glass fiber reinforced resin member _BGF , the metal fastener and the periphery of the hole h1 can be reinforced.

[Resin panel]
1. Shape The shape of the resin panel is not particularly limited. The resin panel preferably has at least one plane portion having at least one thickness (plate thickness), and has a cross-sectional shape of T-shape, L-shape, U-shape, hat-shape (hat shape) and these It may have a three-dimensional shape including, and may further have an uneven shape (eg, ribs, bosses, etc.). It is preferable that the resin panel has a shape including a portion having a hat-shaped cross section.

2. Uneven-thickness structure The resin panel may include an uneven-thickness portion. That is, the resin panel may include a non-uniform thickness structure.
The uneven thickness of the resin panel should be within 30 mm from the metal fastener. Naturally, the uneven thickness portion may exist outside 30 mm from the metal fastener. In other words, the periphery of the metal fastener may have uneven thickness structure. In addition, when the metal fastener is covered with the fiber reinforced resin member A, it is preferable to provide an uneven thickness structure within 30 mm from the metal fastener by the thickness of the fiber reinforced resin member B and the thickness of the fiber reinforced resin member A. It is more preferable that the uneven thickness of the resin panel is within 20 mm from the metal fastener.

2.1 When Insert Molding Using Injection is Used When the resin panel has an uneven thickness structure (a portion where the thickness is not uniform), the fiber-reinforced resin member A preferably contributes to the uneven thickness structure. This is because the material Bm for producing the fiber-reinforced resin member B is preferably plate-shaped, and the material Am for producing the fiber-reinforced resin member A is preferably an injection material. By using the material Am, it is easy to manufacture a resin panel having an uneven thickness structure.
For example, when manufacturing a resin panel having an uneven thickness structure whose thickness gradually increases from 2 mm to 3 mm, when a material Bm having a thickness of 1 mm is placed in a mold, the remaining uneven thickness area of 1 mm to 2 mm is made of material Am. It is preferable to form the fiber reinforced resin member A by throwing it in.

2.2 When using insert molding using SMC When using a sheet molding compound containing carbon fiber as the material Bm and covering the metal fastener at the same time as molding the material Bm, the fiber reinforced resin member B has an uneven thickness structure. can contribute.

3. Ribs 3.1 When Insert Molding Using Injection is Used As shown in FIG. Of course, the ribs 602 may exist outside 30 mm from the metal fasteners 603 .

3.2 When insert molding using SMC is used When using a sheet molding compound containing carbon fiber as the material Bm and covering the metal fastener at the same time as molding the material Bm, ribs are provided using a fiber reinforced resin member. be able to.

4. FIG. 6 shows a schematic diagram of the vehicle structure of the present invention, which includes a metal fastener having a bolt insertion portion and a resin panel. The metal fastener 603 is embedded in the resin panel by insert molding, and the resin panel is provided with a hole h1 (601) at a position corresponding to the bolt insertion portion. FIG. 6 is before the bolt is inserted. In FIG. 6, ribs 602 are provided around metal fasteners 603 .

[Hole h1]
The resin panel is provided with a hole h1 at a position corresponding to the bolt insertion portion.
1. Forming Holes h1 Simultaneously with Molding It is preferable to form holes h1 simultaneously with molding.
For example, it is preferable that a hole h1 is formed in the resin panel by forming a hole in the fiber-reinforced resin member A. In the case of insert molding in which the material Am is injected into the molding die and put into the molding die, if projections corresponding to the holes h1 to be created are provided in advance on the molding die, when the molding is completed by pouring the material Am , a hole h1 can be created in the fiber-reinforced resin member A.
On the other hand, in the case of insert molding using SMC, the mold is provided with projections corresponding to the holes h1 to be formed in advance, and holes h0 are formed at positions corresponding to the projections of the mold for the material Bm, A hole h1 can be formed in the fiber-reinforced resin member B by fitting the hole h0 into the projection of the molding die and pressing. For more details, the methods described in International Publication No. WO 2017/043186 and JP-A-10-100175 can be referred to.
In both cases, since the hole h1 is provided at the same time as the integral molding, the hole h1 can be easily provided. If the hole h1 is provided by integral molding, the manufacturing process can be simplified.

2. Hole h1 provided by secondary processing Alternatively, the hole h1 may be provided by secondary processing.
For example, the hole h1 may be formed by secondary processing after integral molding, which will be described later.

3. Structure of Hole h1 A preferable structure of the hole h1 will be described with reference to FIG. FIG. 7 is a schematic diagram showing a structure in which the resin panel is not involved in the fastening portion as much as possible.
That is, the metal fasteners (eg 701 in FIG. 7) embedded in the resin panel by insert molding and the fasteners (eg 704 in FIG. 7) used for connecting to the vehicle body side are in contact with each other. preferable. More preferably, the metal fastener (eg 701 in FIG. 7) embedded in the resin panel by insert molding and the fastener (eg 704 in FIG. 7) used for coupling with the vehicle body side are in surface contact. preferably. A fastener (for example, 704 in FIG. 7) used for connection with the vehicle body side is preferably a bracket, and is preferably used for connection with the damper stay.
As shown in FIG. 7, the fastening stability is improved by making surface contact between the metals (701 and 704 in FIG. 7) at the bolt fixing locations where the load is applied. In other words, the shape of the hole h1 is defined by the area S1 of the hole h1 viewed from the metal fastener side embedded in the resin panel by insert molding (for example, the area of the hole h1 viewed from the left side in FIG. 7) and the vehicle body side The relationship with the area S2 of the hole h1 viewed from the fastener side (for example, the area of the hole h1 viewed from the right side in FIG. 7) for use in connection with the fastener is preferably S1<S2. Since S1<S2, it is possible to embed a fastener (for example, 704 in FIG. 7) for connection with the vehicle body side in the resin panel. This stabilizes the fastening strength.

[Door panels that make up the back door]
1. Door Panel FIG. 9 is a schematic diagram showing a vehicle back door 1 to which a vehicle structure according to an embodiment of the present invention is applied. As shown in FIG. 9, it is preferable that the resin panel is a door panel constituting the vehicle back door 1, and the vehicle structure is the vehicle resin back door structure. The door panel may have a rear glass 5. The vehicle back door 1 has a side frame 3L on the left side of the rear glass 5 and a side frame 3R on the right side of the rear glass 5. As shown in FIG.

2. Damper Stay FIG. 10 is a schematic diagram showing a part of the side frame 3L to which the damper stay 30 is attached, and FIG. 11 is a cross-sectional view taken along line XI-XI of FIG. As shown in FIGS. 10 and 11 , the vehicle backdoor 1 includes a damper stay 30 . It is preferable that the door panel and the damper stay 30 that constitute the side frame 3L are fastened and fixed by inserting the bolt 32 into the bolt insertion portion 20h. Specifically, bolts are inserted from the inside of the vehicle into the holes 1h provided in the molded body 1A that constitutes the side frame 3L, the bolt insertion portions 20h provided in the metal fasteners 20, and the holes 31 provided in the damper stay 30. 32 is inserted and fastened to the nut 33 outside the vehicle, the damper stay 30 is fixed to the side frame 3L.
The damper stay 30 is a fastener for the damper 35 . The damper 35 is a member that prevents unintentional closing of the back door when the door, lid, or drawer is closed or opened by an orifice structure or a shear structure.

As shown in FIG. 11, the side frame 3L is a vehicle structure including a molding 1A in which a resin panel 10 and metal fasteners 20 are integrally molded. The resin panel 10 has a fiber reinforced resin member 11A containing reinforcing fibers a with a weight average fiber length of less than 3 mm, and a fiber reinforced resin member 12B containing reinforcing fibers b with a weight average fiber length of 3 mm or more. As shown in FIG. 11, the fiber reinforced resin member 12B is in contact with the fiber reinforced resin member 11A.

As shown in FIG. 11, the metal fastener 20 is embedded in the resin panel 10 by insert molding. The metal fastener 20 is covered with the fiber reinforced resin member 11A. Since the fiber reinforced resin member 11A exists between the metal fastener 20 and the fiber reinforced resin member 12B, the fiber reinforced resin member 12B is not in contact with the metal fastener 20.
The fiber-reinforced resin member 11A preferably has a hole 11h at a position corresponding to the bolt insertion portion 20h of the metal fastener 20. As shown in FIG. Moreover, the fiber-reinforced resin member 12B preferably has a hole 12h at a position corresponding to the bolt insertion portion 20h of the metal fastener 20. As shown in FIG.

Although the metal fastener 20 has an I-shaped cross section in FIG. 11, the cross-sectional shape of the metal fastener 20 is not limited to this. For example, as shown in FIG. 12, a metal fastener 20B having an L-shaped cross section may be used, or a molded body 1B in which a resin panel and a metal fastener 20B are integrally molded may be used for a vehicle structure. good.

[Manufacturing method: Insert molding using injection]
In the following, the case where the material Am is injected into the molding die and put into the molding die will be described.
1. Overview In the vehicle structure of the present invention, a material Bm for producing a fiber-reinforced resin member B and a metal fastener are placed in a mold in advance, and a material Am for producing a fiber-reinforced resin member A is placed in the mold. It is preferable that the fiber-reinforced resin member A, the fiber-reinforced resin member B, and the metal fastener are integrally molded.

2. When Cold Press Molding is Used When the resin contained in the fiber-reinforced resin member A and the fiber-reinforced resin member B is a thermoplastic resin, the vehicle structure is preferably manufactured using a cold press.

2.1. A step of arranging in advance the metal fastener 20 and the material Bm for making the fiber-reinforced resin member B in the mold

2.1.1 Arrangement of Metal Fasteners As shown in FIG. 13, the metal fasteners 20 are preferably fixed to the lower die 101 so as not to move during the pressing process. For example, the metal fastener 20 may be fixed to the lower mold 101 by inserting the slide core 110 provided in the lower mold 101 into the hole 21 of the metal fastener 20 . Alternatively, the metal fastener 20 may be clamped to the lower mold 101 in advance, and the slide core 110 may be used so that the molding (finished product) is removed from the mold at the same time as the molding is completed.

2.1.2 Arrangement of Material Bm for Creating Fiber-Reinforced Resin Member 12B After fixing the metal fastener 20 to the lower mold 101, as shown in FIG. Deploy. A hole Bh may be provided at a position corresponding to the slide core 110 of the material Bm.
The step of arranging the material Bm for producing the fiber-reinforced resin member B in the present invention in the mold can be performed using a conventionally known method.
In this case, the material Bm is preferably placed in the mold in a preheated state. When the thermoplastic resin contained in the fiber-reinforced resin member B is crystalline, it is preferably heated to a temperature higher than the melting point and lower than the decomposition temperature. In addition, the temperature of the mold (lower mold 101 and upper mold 102) is adjusted to below the melting point when the thermoplastic resin contained in the fiber-reinforced resin member B is crystalline, and below the glass transition temperature when amorphous. It is preferable that By adjusting the temperature of the material Bm and the mold in this way, the cold press can be suitably performed.
It should be noted that the material Bm is preferably pre-shaped before starting pressing.

2.2 Process of injecting material Am into the mold after closing the mold and starting to apply pressure to a part of the material Bm In the method for manufacturing a vehicle structure of the present invention, as shown in FIG. After placing the material Bm in the mold, the mold is closed. After closing the mold (typically, the upper mold 102 is lowered), the material Am is injected into the mold (preferably by an injection device It is preferable to put it into the mold by).
The timing of injecting the material Am may be immediately before or immediately after pressure is applied to a portion of the material Bm. If the material Bm tends to be misaligned in the mold, it is preferable to inject the material Am immediately after pressure is applied to at least a portion of the material Bm.

It is usually possible to confirm that pressure has started to be applied to part of the material Bm with a pressure gauge provided in the press molding machine. More specifically, after the upper mold 102 (molding upper mold) of the molding die descends and comes into contact with the material Bm, it can be confirmed by outputting the pressure to the pressure gauge of the press molding machine.

The method of injecting the material Am into the mold is not particularly limited, and conventionally known methods can be used. For example, there is a method in which a mold is provided with a gate 103 and the material Am is injected from the outside of the mold by an injection device. The number of gates 103 for injecting the material Am and the positions of the gates 103 are not particularly limited.

In the present invention, it is preferable that the volume Va of the material Am used and the volume Vb of the material Bm used satisfy the relationship of Vb≧Va. Va:Vb is preferably 10:90 to 50:50, more preferably 20:80 to 40:60.
When Va:Vb is 10:90 to 50:50, for example, the material Bm is used to form the main part of the press-molded body, and only the necessary parts (such as edges and details) have high fluidity. It can be formed using the material Am.

The pressure when injecting the material Am is preferably 30-200 kgf/m ² , more preferably 40-150 kgf/m ² . The heating temperature of the material Am is not particularly limited, but is preferably 200 to 300° C. when nylon 6 is used as the thermoplastic resin.

2.3 Process of Cold Pressing Material Am and Material Bm in Mold to Integrally Mold Next, as shown in FIG. By pressing 20, the resin panel 10 and the metal fastener 20 are integrally formed.
Cold pressing can be performed using a conventionally known method. In general, the cold press method is, for example, a fiber-reinforced thermoplastic resin material heated to a first predetermined temperature (material Am when using a thermoplastic resin, material Bm when using a thermoplastic resin as a general term (sometimes referred to as a "fiber-reinforced thermoplastic resin material") is put into a mold set to a second predetermined temperature, and then pressurized and cooled.
Specifically, when the thermoplastic resin contained in the fiber-reinforced thermoplastic resin material is crystalline, the first predetermined temperature is equal to or higher than the melting point, and the second predetermined temperature is lower than the melting point. If the thermoplastic resin is amorphous, the first predetermined temperature is above the glass transition temperature and the second predetermined temperature is below the glass transition temperature. That is, the cold press method includes at least the following steps A-1) to A-2).
Step A-1) A step of heating a fiber-reinforced thermoplastic resin material to a temperature above the melting point and below the decomposition temperature if the thermoplastic resin is crystalline, and to a temperature above the glass transition temperature and below the decomposition temperature if the thermoplastic resin is amorphous.
Step A-2) The temperature of the fiber-reinforced thermoplastic resin material heated in step A-1) is adjusted to below the melting point if the thermoplastic resin is crystalline and below the glass transition temperature if the thermoplastic resin is amorphous. The process of placing and pressurizing in a molded mold.
By carrying out these steps, molding of the fiber-reinforced thermoplastic resin material can be completed (a press-molded article can be produced).
Each of the above steps must be performed in the above order, but other steps may be included between each step. The other step is, for example, prior to step A-2), using a shaping die different from the shaping die used in step A-2) to pre-shape into the shape of the cavity of the shaping die. There is a shaping process, etc. Further, step A-2) is a step of applying pressure to the fiber-reinforced thermoplastic resin material to obtain a molded body having a desired shape. is preferably less than 20 MPa, more preferably 10 MPa or less. In addition, as a matter of course, various steps may be interposed between the above steps during press molding. For example, vacuum press molding in which press molding is performed while a vacuum is applied may be used.

In addition, since the material Am is put into the mold by injection, the material Am when the thermoplastic resin is injected into the mold is above the melting point or above the decomposition temperature if the thermoplastic resin is crystalline and below the glass transition temperature if the thermoplastic resin is amorphous. It is common to heat above the temperature and below the decomposition temperature.
In the present invention, it is preferable that the material Bm is plate-shaped, and the resin panel 10 is manufactured by flowing and extending the material Am in the in-plane direction of the material Bm.

3. Molding method other than cold press Although the above description has focused on "cold press molding", the resin panel 10 and the metal fastener 20 may be integrally molded using hot press molding.

4. Effect of Integral Molding In the preferred method of manufacturing a vehicle structure of the present invention, the material Bm and the metal fastener are placed in advance in a mold, the material Am is injected into the mold, and the fiber reinforced resin member A and the fiber Since the reinforced resin member B and the metal fasteners are integrally molded, a resin panel in which the metal fasteners are integrated can be manufactured in a single molding process, resulting in excellent productivity.
Moreover, in a preferable manufacturing method, the bonding strength between the fiber reinforced resin member A and the fiber reinforced resin member B is also excellent in the resin panel.
Furthermore, in the present invention, it is also possible to inject and press the material Am, which is easy to flow, only to the necessary parts, so that it is possible to manufacture molded bodies with more complicated shapes (for example, molded bodies having ribs and bosses). is possible.

<Modification>
In the above embodiment, the metal fastener 20 is covered with the fiber reinforced resin member 11A, the fiber reinforced resin member 12B is in contact with the fiber reinforced resin member 11A, and the fiber reinforced resin member 12B is in contact with the metal fastener 20. Although a non-existent example has been described, the invention is not limited to this.
For example, as shown in FIG. 17, a molded body 1C in which a metal fastener 20 is covered with a fiber-reinforced resin member 12B may be used for a vehicle structure. In FIG. 17, the resin panel 10 and the metal fastener 20 are integrally molded in a state where the metal fastener 20 is in contact with the fiber-reinforced resin member 12B and the fiber-reinforced resin member 11A is not in contact with the metal fastener 20. .
The fiber-reinforced resin member 12B preferably has a hole 12h at a position corresponding to the bolt insertion portion 20h of the metal fastener 20. As shown in FIG.

A molded body 1C shown in FIG. 17 can be manufactured, for example, as described below.
First, the metal fastener 20 is fixed to the lower mold 101 as in FIG.
Next, as in FIG. 14, the material Bm is placed in the cavity of the lower mold 101 .
Next, as shown in FIG. 18, after placing the material Bm in the mold, the mold is closed.
Next, the material Am is injected from the gate 103 into the mold. At this time, as shown in FIG. 18, a gate 103 is provided at a portion of the lower mold 101 away from the position where the metal fastener 20 is fixed.
After that, press molding is completed so that the material Bm and the metal fastener 20 come into contact with each other before the material Am injected from the gate 103 flows into the space between the material Bm and the metal fastener 20 .

[Manufacturing method: Molding method using sheet molding compound to cover metal fasteners]
A sheet molding compound is used to form a glass fiber reinforced resin member _BGF or a carbon fiber reinforced resin member _BCF , and the metal fastener is covered with the glass fiber reinforced resin member _BGF or the carbon fiber reinforced resin member _BCF . Also good. In this case, injection material need not necessarily be used.
FIG. 8 depicts sandwiching and molding a metal fastener 801 using material Bm (sheet molding compound, 802). The metal fastener 801 is supported by the slide core 803 so as not to move by the material Bm or the like. As shown in FIG. 8, a plurality of materials Bm and the metal fasteners 801 are arranged in a mold with the metal fasteners 801 sandwiched between the plurality of materials Bm for making the fiber-reinforced resin member B, By integrally molding the fiber-reinforced resin member B and the metal fastener 801, the vehicle structure can be molded. By arranging them as shown in FIG. 8, it is possible to manufacture a vehicle structure in which the metal fasteners are covered with the glass fiber reinforced resin member _BGF or the carbon fiber reinforced resin member _BCF .

This application claims priority based on Japanese Patent Application No. 2022-016724 filed on February 4, 2022.

Claims (27)

1. A vehicle structure comprising a metal fastener having a bolt insertion portion and a resin panel,
   The metal fastener is embedded in the resin panel by insert molding,
   The vehicle structure, wherein the resin panel is provided with a hole at a position corresponding to the bolt insertion portion.
2. The resin panel is
   a fiber-reinforced resin member A containing reinforcing fibers a having a weight-average fiber length of less than 3 mm;
   a fiber-reinforced resin member B containing reinforcing fibers b having a weight average fiber length of 3 mm or more;
   A vehicle structure according to claim 1 .
3. The vehicle structure according to claim 2, wherein said fiber reinforced resin member A has said hole.
4. The vehicle structure according to claim 2 or 3, wherein the metal fastener is covered with the fiber-reinforced resin member A.
5. The vehicle structure according to any one of claims 2 to 4, wherein said fiber reinforced resin member B is in contact with said fiber reinforced resin member A.
6. The vehicle structure according to claim 4 or 5, wherein the fiber-reinforced resin member B is not in contact with the metal fastener.
7. The resin contained in the fiber-reinforced resin member A is a thermoplastic resin or a thermosetting resin,
   The vehicle structure according to any one of claims 2 to 6, wherein the resin contained in said fiber-reinforced resin member B is a thermoplastic resin or a thermosetting resin.
8. The fiber reinforced resin member A is a glass fiber reinforced resin member A _GF containing glass fibers having a weight average fiber length of less than 3 mm,
   The fiber reinforced resin member B is a carbon fiber reinforced resin member B _CF containing carbon fibers having a weight average fiber length of 3 mm or more, or a glass fiber reinforced resin member B _GF containing glass fibers having a weight average fiber length of 3 mm or more.
   The vehicle structure according to any one of claims 2-7.
9. The reinforced fiber resin member B includes a carbon fiber reinforced resin member B _CF containing carbon fibers having a weight average fiber length of 3 mm or more, and a glass fiber reinforced resin member B _GF containing glass fibers having a weight average fiber length of 3 mm or more,
   The metal fastener is covered with a glass fiber reinforced resin member _AGF containing glass fibers having a weight average fiber length of less than 3 mm,
   The vehicle structure according to claim 7, wherein the glass fiber reinforced resin member _AGF is in contact with the carbon fiber reinforced resin member _BCF .
10. The vehicle structure according to claim 9, wherein said glass fiber reinforced resin member _AGF , said carbon fiber reinforced resin member _BCF , and said glass fiber reinforced resin member _BGF contain a thermoplastic resin.
11. The vehicle structure according to claim 9, wherein said carbon fiber reinforced resin member _BCF and said glass fiber reinforced resin member _BGF are molded from a sheet molding compound.
12. The vehicle structure according to claim 2, wherein said fiber-reinforced resin member B has said hole.
13. The vehicle structure according to claim 2, wherein the metal fastener is in contact with the fiber-reinforced resin member B.
14. The resin panel has a fiber reinforced resin member B,
    The fiber reinforced resin member B is
    Reinforcing fiber b having a weight average fiber length of 3 mm or more, and a thermoplastic resin,
    The vehicle structure according to claim 1, wherein the metal fastener is covered with the fiber-reinforced resin member (B).
15. The reinforced resin member B includes a glass fiber reinforced resin member B _GF ,
    The glass fiber reinforced resin member B _GF is
    Glass fiber with a weight average fiber length of 3 mm or more, and a thermoplastic resin,
    15. The vehicle structure according to claim 14, wherein said metal fastener is covered by said glass fiber reinforced resin member _BGF .
16. The resin panel has a fiber reinforced resin member B,
    The fiber reinforced resin member B includes a glass fiber reinforced resin member B _GF containing glass fibers having a weight average fiber length of 3 mm or more,
    2. The vehicle structure according to claim 1, wherein said glass fiber reinforced resin member _BGF is formed by molding a sheet molding compound.
17. The fiber reinforced resin member B includes a carbon fiber reinforced resin member B _CF containing carbon fibers having a weight average fiber length of 3 mm or more, and a glass fiber reinforced resin member B _GF containing glass fibers having a weight average fiber length of 3 mm or more,
    The carbon fiber reinforced resin member _BCF is formed by molding a sheet molding compound,
    17. The vehicle structure according to claim 16, wherein the metal fastener is covered with the glass fiber reinforced resin member _BGF or the carbon fiber reinforced resin member _BCF .
18. The vehicle structure according to any one of claims 1 to 17, wherein the metal fastener is L-shaped or I-shaped.
19. The resin panel is a door panel constituting a vehicle back door, and the vehicle structure is a vehicle resin back door structure.
    Vehicle structure according to any one of claims 1 to 18.
20. The vehicle back door includes a damper stay,
    The door panel and the damper stay are fastened and fixed by bolts inserted into the bolt fastening holes,
    20. Vehicle structure according to claim 19.
21. The vehicle structure according to claim 19 or 20, wherein said door panel comprises a rear glass.
22. The vehicle structure according to any one of claims 2 to 21, wherein said resin panel has a rib within 30 mm from said metal fastener.
23. The vehicle structure according to any one of claims 2 to 22, wherein the resin panel has an uneven thickness portion within 30 mm from the metal fastener.
24. The material Bm for producing the fiber-reinforced resin member B and the metal fastener are placed in a mold in advance, the material Am for producing the fiber-reinforced resin member A is injected into the mold, and the fiber The method for manufacturing a vehicle structure according to any one of claims 2 to 13, wherein the reinforced resin member A, the fiber reinforced resin member B, and the metal fastener are integrally molded.
25. The method of manufacturing a vehicle structure according to claim 24, wherein the hole is provided by secondary processing after integrally molding the fiber reinforced resin member A, the fiber reinforced resin member B, and the metal fastener.
26. The method of manufacturing a vehicle structure according to claim 24, wherein the holes are provided at the same time when the fiber reinforced resin member A, the fiber reinforced resin member B, and the metal fastener are integrally molded.
27. The plurality of materials Bm and the metal fastener are arranged in a mold with the metal fastener sandwiched between the plurality of materials Bm for creating the fiber reinforced resin member B, and the fiber reinforced resin member B, and the method of manufacturing a vehicle structure according to any one of claims 14 to 17, wherein the metal fasteners are integrally molded.

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