Fiber-reinforced plastic products

Abstract

We can provide fiber-reinforced plastic products that suppress the occurrence of manufacturing defects and improve production efficiency. [Solution] In a fiber-reinforced plastic product 1 in which an upper fiber-reinforced plastic part 10 and a lower fiber-reinforced plastic part 20 are bonded to each other via an adhesive at their opposing bonding surfaces, the product includes a resistance shape 40 provided on the inside of the bonding surface 21 of the lower fiber-reinforced plastic part 20, which protrudes toward the bonding surface 11 of the upper fiber-reinforced plastic part 10 to suppress the flow of adhesive applied to the bonding surface toward the inner slope 22, and side projections 41 provided on the outer slope 23 of the upper fiber-reinforced plastic part 10, which extend vertically, and the side projections 41 are formed such that the end face in the direction of protrusion abuts against or is close to the outer opposing side surface 12, and a plurality of them are formed at predetermined intervals in the width direction of the outer slope 23.

Description

Technical Field

[0005] , ,

[0001] This invention relates to, for example, a fiber reinforced plastic product formed by bonding and integrating a plurality of fiber reinforced plastic parts.

Background Art

[0002] Conventionally, as a method for manufacturing a fiber reinforced plastic product having a laminated structure, a fiber preform made of preformed fibers is placed in a mold (forming mold) that can seal a laminate formed by laminating the fiber preforms, and a resin is injected into the mold to impregnate the laminate, thereby manufacturing a fiber reinforced plastic product (for example, Patent Document 1).

[0003] Some of such fiber reinforced plastic products are configured by bonding and integrating upper and lower fiber reinforced plastic parts. However, in the prior art, when bonding the upper and lower fiber reinforced plastic parts, it is important to appropriately maintain the clearance between the fiber reinforced plastic products, but there is a problem that it is difficult to maintain this clearance. In addition, there is a risk that the adhesive may flow out to unintended parts during bonding, causing manufacturing defects. Therefore, it is required to suppress the occurrence of manufacturing defects and improve production technicality.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a novel fiber reinforced plastic product capable of suppressing the occurrence of manufacturing defects and improving production technicality. [Means for solving the problem]

[0006] The present invention relates to a fiber-reinforced plastic product in which an upper fiber-reinforced plastic part and a lower fiber-reinforced plastic part are bonded to each other via an adhesive at their opposing bonding surfaces, wherein the fiber-reinforced plastic product comprises: an inner slope extending downward from the inner edge of the bonding surface of the lower fiber-reinforced plastic part; a resistance shape provided on the inside of the bonding surface of the lower fiber-reinforced plastic part, which protrudes toward the bonding surface of the upper fiber-reinforced plastic part to suppress the flow of the adhesive applied to the bonding surface to the inner slope; an outer slope extending upward or downward from the outer edge of the bonding surface of the lower fiber-reinforced plastic part; an outer opposing side surface provided on the upper fiber-reinforced plastic part and facing the outer slope; and a plurality of side projections provided on the outer slope that extend vertically, wherein the side projections are formed such that the end face in the direction of protrusion abuts against or is close to the opposing side surface, and a plurality of such projections are formed at predetermined intervals in the width direction of the outer slope.

[0007] Furthermore, the present invention relates to a fiber-reinforced plastic product in which an upper fiber-reinforced plastic part and a lower fiber-reinforced plastic part are bonded to each other via an adhesive at their opposing bonding surfaces, the fiber-reinforced plastic product comprising: an inner slope extending downward from the inner edge of the bonding surface of the lower fiber-reinforced plastic part; a resistance shape provided on the inside of the bonding surface of the upper fiber-reinforced plastic part, which protrudes toward the bonding surface of the lower fiber-reinforced plastic part to suppress the flow of the adhesive applied to the bonding surface to the inner slope; an outer slope extending upward or downward from the outer edge of the bonding surface of the lower fiber-reinforced plastic part; an outer opposing side surface provided on the upper fiber-reinforced plastic part and facing the outer slope; and a side projection provided on the outer opposing side surface and extending vertically, wherein the side projection is formed such that its end face in the direction of projection abuts against or is close to the outer slope, and a plurality of such projections are formed at predetermined intervals in the width direction of the outer opposing side surface. [Effects of the Invention]

[0008] The present invention provides a novel fiber-reinforced plastic product that can suppress the occurrence of manufacturing defects and improve production efficiency. [Brief explanation of the drawing]

[0009] [Figure 1] A perspective view showing an example of the composition of a fiber-reinforced plastic product in one embodiment of the present invention. [Figure 2] An exploded perspective view showing an example of the composition of a fiber-reinforced plastic product in one embodiment of the present invention. [Figure 3] A schematic cross-sectional view showing an example of the configuration of a joint structure in one embodiment of the present invention. [Figure 4] A perspective view showing an example of the configuration of the upper fiber-reinforced plastic component in one embodiment of the present invention. [Figure 5] An exploded perspective view showing an example of the configuration of a fiber-reinforced plastic product in another embodiment of the present invention. [Figure 6] A schematic cross-sectional view showing an example of the configuration of a joint structure in another embodiment of the present invention. [Figure 7] An enlarged cross-sectional view of the first joint in Figure 6. [Figure 8] An enlarged cross-sectional view of the second joint in Figure 6. [Figure 9] A perspective view showing an example of the configuration of an upper fiber-reinforced plastic component in another embodiment of the present invention. [Modes for carrying out the invention]

[0010] The following describes one embodiment of the present invention. The present invention relates to a method for molding resin products containing fibers (reinforcement fibers) and a laminated structure, and more particularly to a laminated structure made of a laminate formed by integrating multiple layers of fiber preforms, and a fiber-reinforced plastic product made of fiber-reinforced plastic (FRP) obtained by injecting resin into the laminated structure and curing the entire structure.

[0011] Figure 1 is a perspective view showing an example of the configuration of fiber-reinforced plastic product 1 in one embodiment of the present invention. Figure 2 is an exploded perspective view showing an example of the configuration of fiber-reinforced plastic product 1 in one embodiment of the present invention.

[0012] As shown in Figures 1 and 2, the fiber-reinforced plastic product 1 of the present invention is formed by bonding and integrating a plurality of fiber-reinforced plastic parts. In this embodiment, the fiber-reinforced plastic product 1 is formed by bonding an upper fiber-reinforced plastic part 10 and a lower fiber-reinforced plastic part 20 to each other via an adhesive 30 at their opposing bonding surfaces.

[0013] Each of the upper fiber-reinforced plastic part 10 and the lower fiber-reinforced plastic part 20 is molded using various known methods. For example, each of the upper fiber-reinforced plastic part 10 and the lower fiber-reinforced plastic part 20 is formed by the Resin Transfer Molding (RTM) method (hereinafter referred to as the "RTM method"), in which reinforcing fiber sheets are laminated in the thickness direction and then impregnated with resin. The RTM method is a molding method in which a pre-molded laminated structure is placed in a mold, liquid resin (matrix resin) is injected into it to impregnate it, and then it is cured by natural curing, heating, or pressurization, and fiber-reinforced resin products can be manufactured with high precision and efficiency. Each of the upper fiber-reinforced plastic part 10 and the lower fiber-reinforced plastic part 20 is not limited to the RTM method, and can also be molded using other known methods such as hand lay-up, spray-up, and press molding (SMC, BMC, cold press, etc.).

[0014] The matrix resin used in the present invention does not necessarily need to be particularly limited, and known ones can be appropriately used. For example, as the matrix resin, unsaturated polyester resin, epoxy resin, vinyl ester resin, phenol resin, polyurethane resin, polyamide resin, polyimide resin, and other resins similar thereto can be used. In particular, the mainstream ones include unsaturated polyester resin, epoxy resin, and vinyl ester resin. Unsaturated polyester resin is easy to handle and has low cost, so it is widely used for general purposes such as automotive parts. Epoxy resin has high mechanical properties and heat resistance and is suitable for the aerospace field and high-performance structural members. Vinyl ester resin is excellent in corrosion resistance and mechanical properties, shows performance equivalent to that of epoxy resin, and is easy to handle.

[0015] The reinforcing fiber sheet used in the present invention does not necessarily need to be particularly limited, and known ones can be appropriately used. For example, as the reinforcing fiber sheet, carbon fiber sheet, glass fiber sheet, etc. can be mentioned. The types of these fibers are not particularly limited, but those having an effect of improving strength when used as fiber reinforced plastics are desirable.

[0016] When the upper fiber reinforced plastic component 10 and the lower fiber reinforced plastic component 20 are molded, the upper fiber reinforced plastic component 10 and the lower fiber reinforced plastic component 20 are adhered via an adhesive 30 (adhesion step).

[0017] In the adhesion step, after the adhesive 30 is measured and mixed, the adhesive 30 is applied to the joint surface, and the upper fiber reinforced plastic component 10 and the lower fiber reinforced plastic component 20 are aligned with each other and joined. At this time, if necessary, a certain pressure can be applied to the upper fiber reinforced plastic component 10 and the lower fiber reinforced plastic component 20 to press and fix them. By doing so, it is possible to prevent voids from remaining inside the layer of the adhesive 30 (adhesive layer) and make the thickness of the adhesive layer as uniform as possible.

[0018] After the bonding process, the adhesive 30 is cured (curing process). In the curing process, although it varies depending on the type of adhesive 30 used, in order to achieve high strength, it is desirable to perform heat curing.

[0019] The adhesive 30 used in the present invention does not particularly need to be limited, and known ones can be appropriately used. The adhesive 30 preferably has a high affinity with the bonding surfaces of the upper fiber reinforced plastic part 10 and the lower fiber reinforced plastic part 20 and excellent mechanical properties after curing. For example, as the adhesive 30, an epoxy resin-based adhesive, a urethane resin-based adhesive, a vinyl ester resin-based adhesive, a methacrylic acid ester (acrylic) - based adhesive, etc. can be used.

[0020] Before entering the bonding process, the bonding surfaces of the upper fiber reinforced plastic part 10 and the lower fiber reinforced plastic part 20 can also be pretreated to maximize the bonding strength. The pretreatment includes degreasing using acetone or the like, and mechanical roughening of the surface using sandpaper or sandblasting. Also, if necessary, a primer treatment such as a silane coupling agent can be performed. By doing so, the chemical bond between the bonding surfaces of the upper fiber reinforced plastic part 10 and the lower fiber reinforced plastic part 20 and the adhesive 30 can be promoted. <Structure of the bonded part of the present invention> The bonding structure of the upper fiber reinforced plastic part 10 and the lower fiber reinforced plastic part 20 in the present invention will be described. FIG. 3 is a schematic cross-sectional view showing an example of the configuration of the bonding structure in one embodiment of the present invention. FIG. 4 is a perspective view showing an example of the configuration of the upper fiber reinforced plastic part in one embodiment of the present invention.

[0021] As shown in Figures 3 and 4, the joining structure of the upper fiber-reinforced plastic part 10 and the lower fiber-reinforced plastic part 20 according to the present invention includes an inner slope 22 extending downward from the inner edge of the adhesive surface 21 of the lower fiber-reinforced plastic part 20, a resistance shape 40 provided on the inner side (inner slope 22 side) of the adhesive surface 11 of the upper fiber-reinforced plastic part 10 and protruding toward the adhesive surface 21 of the lower fiber-reinforced plastic part 20 to suppress the flow of adhesive 30 applied to the adhesive surface 11 or adhesive surface 21 toward the inner slope 22 side, an outer slope 23 extending upward or downward from the outer edge of the adhesive surface 21 of the lower fiber-reinforced plastic part 20, an outer opposing side surface 12 provided on the upper fiber-reinforced plastic part 10 and facing the outer slope 23, a side projection 41 provided on the outer opposing side surface 12 and extending vertically, and an adhesive surface projection 42 provided on the adhesive surface 11 of the upper fiber-reinforced plastic part 10 and protruding downward.

[0022] In Figure 3, etc., for the sake of simplicity, the inner slope 22 is positioned perpendicular to the adhesive surface 21. Although formed at an angle, in reality, a draft angle is set, so it is a surface inclined at a predetermined angle with respect to the bonding surface 21. The inner inclined surface 22 may serve to guide the adhesive 30 before curing to flow inward (downward). The inner inclined surface 22 is typically formed as a plane inclined with respect to the bonding surface 21, but its shape may also be other shapes such as a gently curved surface or a bent surface that is bent at multiple angles.

[0023] The resistance shape 40 is provided on the inner slope 22 side of the adhesive surface 11 of the upper fiber-reinforced plastic part 10. By protruding toward the adhesive surface 21 of the lower fiber-reinforced plastic part 20, the resistance shape 40 plays a role in preventing the adhesive 30 applied to the adhesive surface 11 or adhesive surface 21 from flowing out toward the inner slope 22. The specific shape of the resistance shape 40 can be various forms, such as a rib shape extending in the vertical direction or a shape with multiple protrusions arranged in a row, as long as it can suppress the outflow of the adhesive 30. Furthermore, when the resistance shape 40 is formed in a rib shape, various cross-sectional shapes can be adopted, such as a roughly circular, roughly semicircular, or roughly rectangular shape.

[0024] The amount of protrusion of the resistance shape 40 is set to provide sufficient resistance to the path through which the adhesive 30 flows into the inner slope 22. Specifically, the amount of protrusion of the resistance shape 40 can be 70% or more of the clearance between the adhesive surface 11 and the adhesive surface 21, preferably 90% or more, and more preferably 100% (a configuration in which the tip surface of the resistance shape 40 abuts against the adhesive surface 21). Furthermore, if the amount of protrusion of the resistance shape 40 is less than 100% of the clearance between the adhesive surface 11 and the adhesive surface 21, the lower limit of the clearance between the tip surface of the resistance shape 40 and the adhesive surface 21 can be 0.3 mm or more, 0.75 mm or more, or 2 mm or more. Furthermore, the upper limit of the clearance between the tip surface of the resistance shape 40 and the adhesive surface 21 can be 10 mm or less, or 4 mm or less. In this way, the adhesive 30 can be filled into the gap between the resistance shape 40 and the adhesive surface 21, and adhesive strength can be ensured.

[0025] The outer bevel 23 is formed to extend upward or downward from the outer edge of the bonding surface 21 of the lower fiber-reinforced plastic part 20. In this embodiment, the outer bevel 23 is formed to extend downward from the outer edge of the bonding surface 21. This outer bevel 23 can also function as a guide when aligning with the upper fiber-reinforced plastic part 10. The outer bevel 23 is also typically an inclined plane, but it may be a curved surface or a bent surface, as long as it satisfies the roles of fitting the parts and acting as a guide. Note that in Figure 3 and other figures, the outer bevel 23 is formed at an angle perpendicular to the bonding surface 21 for the sake of simplicity in the diagram, but in reality, a draft angle is set, so it is a surface inclined at a predetermined angle with respect to the bonding surface 21.

[0026] The outer opposing side surface 12 is provided on the upper fiber-reinforced plastic part 10 and is positioned to face the outer slope 23. The outer opposing side surface 12 functions as a surface facing the outer slope 23 and forms part of the joint structure of the parts. In Figure 3 and other figures, the outer opposing side surface 12 is formed at an angle perpendicular to the bonding surface 11 for the sake of simplicity in the diagram, but in reality, a draft angle is set, so it is a surface that is inclined at a predetermined angle with respect to the bonding surface 11.

[0027] The side projections 41 are provided on the outer opposing side surfaces 12 and have a shape that extends vertically. The side projections 41 are formed so that the end face in the direction of projection abuts against or is close to the outer slope 23. This effectively positions the upper fiber-reinforced plastic part 10 and the lower fiber-reinforced plastic part 20 in the width direction. It is desirable that the end face of the side projection 41 be designed to form a planar, linear, or point-like contact shape corresponding to the shape of the outer slope 23.

[0028] Multiple side protrusions 41 are formed at predetermined intervals in the width direction of the outer opposing side surface 12. These multiple side protrusions 41 contact or approach the outer inclined surface 23 during joining, thereby suppressing play in the width direction between the upper fiber-reinforced plastic part 10 and the lower fiber-reinforced plastic part 20, and achieving highly accurate positioning. The specific shape of the side protrusions 41 is not particularly limited, as long as it can ensure an appropriate contact or proximity relationship with the outer inclined surface 23, such as a cylindrical, prismatic, or rib shape. Furthermore, the side protrusions 41 not only position the upper fiber-reinforced plastic part 10 and the lower fiber-reinforced plastic part 20, but also stabilize the clearance between the outer opposing side surface 12 and the outer inclined surface 23, i.e., the thickness of the adhesive layer into which the adhesive 30 enters (bringing it closer to the design value). It is also possible to configure the side protrusions 41 to contact the outer inclined surface 23.

[0029] The adhesive surface protrusions 42 are provided at predetermined positions on the adhesive surface 11 of the upper fiber-reinforced plastic part 10. Multiple adhesive surface protrusions 42 are formed at predetermined intervals in the width direction of the adhesive surface 11 of the upper fiber-reinforced plastic part 10, and can be positioned spaced apart from the resistance shape 40. Various shapes can be adopted for the adhesive surface protrusions 42, such as a rib shape extending in the vertical direction or a shape with multiple protrusions lined up. Furthermore, when the adhesive surface protrusions 42 are formed in a rib shape, various cross-sectional shapes can be adopted, such as a roughly circular, roughly semicircular, or roughly rectangular shape. The amount of protrusion of the adhesive surface protrusions 42 can be 70% or more of the clearance between the adhesive surface 11 and the adhesive surface 21, preferably 90% or more, and more preferably 100% (a configuration in which the tip surface of the adhesive surface protrusion 42 abuts against the adhesive surface 21). That is, the adhesive surface protrusions 42 may be positioned spaced apart from the adhesive surface 21 of the lower fiber-reinforced plastic part 20. In this case, the lower limit of the clearance between the tip surface of the adhesive surface projection 42 and the adhesive surface 21 can be 0.3 mm or more, 0.75 mm or more, or 2 mm or more. The upper limit of the clearance between the tip surface of the adhesive surface projection 42 and the adhesive surface 21 can be 10 mm or less, or 4 mm or less. In this way, the adhesive 30 can be filled into the gap between the adhesive surface projection 42 and the adhesive surface 21, ensuring adhesive strength. The adhesive surface projection 42 may also be positioned to abut against the adhesive surface 21. In this way, the clearance between the adhesive surface 11 and the adhesive surface 21, that is, the thickness of the adhesive layer into which the adhesive 30 enters, can be stabilized (brought closer to the design value).

[0030] Furthermore, the lower limit of the minimum separation distance (clearance) between adjacent adhesive surface protrusions 42 can be 0.3 mm or more, preferably 0.75 mm or more, and more preferably 2 mm or more. The upper limit of the clearance between adjacent adhesive surface protrusions 42 can be 25 mm or less, preferably 12 mm or less, and more preferably 10 mm or less.

[0031] Furthermore, the clearance between each adhesive surface projection 42 and the resistive shape 40 can be at least 0.3 mm, preferably 0.75 mm or more, and more preferably 2 mm or more. In addition, each adhesive surface projection 42 can be arranged to abut against the resistive shape 40 (the adhesive surface projection 42 and the resistive shape 40 can be arranged as an integrated unit).

[0032] As described above, the fiber-reinforced plastic product 1 of the present invention has a resistance shape 40 provided on the inner side (inner slope 22 side) of the adhesive surface 11 of the upper fiber-reinforced plastic part 10, which protrudes toward the adhesive surface 21 of the lower fiber-reinforced plastic part 20, and a side projection 41 provided on the outer opposing side surface 12 that extends vertically. Therefore, the resistance shape 40 can suppress the flow of adhesive 30 applied to the adhesive surface 11 or adhesive surface 21 toward the inner slope 22, and the side projection 41 can not only position the upper fiber-reinforced plastic part 10 and the lower fiber-reinforced plastic part 20, but also stabilize the clearance between the outer opposing side surface 12 and the outer slope 23, that is, the thickness of the adhesive layer into which the adhesive 30 enters (bringing it closer to the design value). Thus, it is possible to suppress the occurrence of manufacturing defects and improve production efficiency.

[0033] Furthermore, in this invention, the adhesive surface projection 42 is provided on the adhesive surface 11 of the upper fiber-reinforced plastic part 10 and protrudes downward. Multiple adhesive surface projections 42 are formed at predetermined intervals in the width direction of the adhesive surface 21 of the lower fiber-reinforced plastic part 20 and are spaced apart from the resistance shape 40. This makes it possible to stabilize the clearance between the adhesive surface 11 of the upper fiber-reinforced plastic part 10 and the adhesive surface 21 of the lower fiber-reinforced plastic part 20, that is, the thickness of the adhesive layer into which the adhesive 30 enters (approaching the design value). In addition, since the adhesive 30 before curing can flow and move between the adhesive surface projection 42 and the resistance shape 40, the thickness of the adhesive 30 can be brought closer to the ideal configuration (design value) defined by the adhesive surface 11 and the adhesive surface 21.

[0034] Furthermore, in the present invention, when the adhesive surface protrusion 42 is positioned spaced apart from the adhesive surface 21 of the lower fiber-reinforced plastic part 20, the contact area between the adhesive surface 11 of the upper fiber-reinforced plastic part 10 and the adhesive surface 21 of the lower fiber-reinforced plastic part 20 and the adhesive 30 can be increased, thereby enhancing the adhesive strength and ultimately increasing the mechanical strength of the fiber-reinforced plastic product 1. <Modified Embodiment> A modified embodiment of the present invention will now be described. Figure 5 is an exploded perspective view showing an example of the configuration of a fiber-reinforced plastic product 1 in another embodiment (modified embodiment) of the present invention. Figure 6 is a schematic cross-sectional view showing an example of the configuration of a joint structure in a modified embodiment. In Figure 6, the joint on the left side of the paper is referred to as the first joint 2, and the joint on the right side is referred to as the second joint 3. Figure 7 is an enlarged cross-sectional view of the first joint in Figure 6. Figure 8 is an enlarged cross-sectional view of the second joint in Figure 6. Figure 9 is a perspective view showing an example of the configuration of the upper fiber-reinforced plastic part 10 in a modified embodiment.

[0035] As shown in Figure 5, in this embodiment, the adhesive surface 21 of the lower fiber-reinforced plastic part 20 is formed in an annular shape. Although it is difficult to see from the drawing, the adhesive surface 11 of the upper fiber-reinforced plastic part 10 is also formed in an annular shape to match the adhesive surface 21, and the adhesive 30 interposed between the adhesive surface 11 and the adhesive surface 21 is also provided in an annular shape.

[0036] As shown in Figures 6 to 8, in this embodiment as well, the joining structure of the upper fiber-reinforced plastic part 10 and the lower fiber-reinforced plastic part 20 includes an inner slope 22, a resistance shape 40, an outer slope 23, an outer opposing side surface 12, a side projection 41, and an adhesive surface projection 42. The functions and characteristics of each of these parts constituting the joining structure are the same as those of the embodiments described above with reference to Figures 3 and 4.

[0037] As shown in Figure 9, in this embodiment, the resistance shape 40 is also formed in an annular shape to match the adhesive surfaces 11 and 21. That is, the resistance shape 40 is formed without gaps at the inner position of the adhesive surfaces 11 and 21. Therefore, in this embodiment, in addition to the effects obtained in the above-described embodiment, it is possible to more reliably suppress the outflow of the adhesive 30 applied to the adhesive surface 11 or 21 to the inner slope surface 22, and to stabilize the thickness of the adhesive layer into which the annularly formed adhesive 30 enters. Thus, it is possible to suppress the occurrence of manufacturing defects and improve production efficiency.

[0038] Furthermore, in this embodiment, the side projections 41 and the adhesive surface projections 42 are positioned at corresponding locations in the width direction (circumferential direction) of the adhesive surface 11 and the adhesive surface 21. This allows for maintaining a balance in the circumferential direction of the adhesive layer into which the adhesive 30 penetrates, thereby suppressing the occurrence of manufacturing defects and improving production efficiency.

[0039] The fiber-reinforced plastic product of this invention corresponds to the fiber-reinforced plastic product 1 of the above embodiment. Similarly, the upper fiber-reinforced plastic part corresponds to the upper fiber-reinforced plastic part 10, the lower fiber-reinforced plastic part corresponds to the lower fiber-reinforced plastic part 20, the adhesive surface corresponds to the adhesive surface 11 or adhesive surface 21, the outer opposing side surface corresponds to the outer opposing side surface 12, the inner slope corresponds to the inner slope 22, the outer slope corresponds to the outer slope 23, the adhesive corresponds to the adhesive 30, the resistance shape corresponds to the resistance shape 40, the side projection corresponds to the side projection 41, and the adhesive surface projection corresponds to the adhesive surface projection 42. However, this invention is not limited to this embodiment and can take various other forms. Furthermore, the specific configurations and other details listed in the above embodiment are examples and can be appropriately modified according to the actual product.

[0040] For example, in the above embodiment, the case in which the resistance shape 40, side projections 41, and adhesive surface projections 42 are provided on the upper fiber-reinforced plastic part 10 was described as an example, but some or all of the resistance shape 40, side projections 41, and adhesive surface projections 42 may be provided on the lower fiber-reinforced plastic part 20. In this modified embodiment, the resistance shape 40 is provided on the inside (inner slope 22 side) of the adhesive surface 21 of the lower fiber-reinforced plastic part 20, and is configured to suppress the flow of adhesive 30 toward the inner slope 22 side by protruding toward the adhesive surface 11 of the upper fiber-reinforced plastic part 10. The side projections 41 are provided on the outer slope 23 and are configured to extend vertically. The adhesive surface projections 42 are provided on the adhesive surface 21 of the lower fiber-reinforced plastic part 20 and are configured to protrude upward. [Industrial applicability]

[0041] The present invention can be used in the industry that manufactures fiber-reinforced plastic products. [Explanation of Symbols]

[0042] 1…Fiber-reinforced plastic products 10…Upper fiber-reinforced plastic part 11…Adhesive surface 12…Outside facing side 20…Lower fiber-reinforced plastic part 21...Adhesive surface 22…Inner slope 23…Outside slope 30…Adhesive 40…Resistance shape 41…Side protrusion 42...Adhesive surface protrusion

Claims

1. In a fiber-reinforced plastic product in which an upper fiber-reinforced plastic component and a lower fiber-reinforced plastic component are bonded together via an adhesive at their opposing bonding surfaces, The inner slope extending downward from the inner edge of the adhesive surface of the lower fiber-reinforced plastic part, A resistance shape is provided on the inside of the bonding surface of the lower fiber-reinforced plastic part, and protrudes toward the bonding surface of the upper fiber-reinforced plastic part to suppress the flow of the adhesive applied to the bonding surface toward the inner slope, An outer bevel extending upward or downward from the outer edge of the adhesive surface of the lower fiber-reinforced plastic part, The upper fiber-reinforced plastic part is provided with an outer opposing side surface that faces the outer inclined surface, The aforementioned outer slope is provided with a lateral projection that extends vertically, The aforementioned side projections are formed such that the end face in the direction of projection abuts against or is close to the outer opposing side surface, and a plurality of them are formed at predetermined intervals in the width direction of the outer slope. Fiber-reinforced plastic products.

2. In a fiber-reinforced plastic product in which an upper fiber-reinforced plastic component and a lower fiber-reinforced plastic component are bonded together via an adhesive at their opposing bonding surfaces, The inner slope extending downward from the inner edge of the adhesive surface of the lower fiber-reinforced plastic part, A resistance shape is provided on the inside of the bonding surface of the upper fiber-reinforced plastic part, and protrudes toward the bonding surface of the lower fiber-reinforced plastic part to suppress the flow of the adhesive applied to the bonding surface toward the inner slope, An outer bevel extending upward or downward from the outer edge of the adhesive surface of the lower fiber-reinforced plastic part, The upper fiber-reinforced plastic part is provided with an outer opposing side surface that faces the outer inclined surface, The aforementioned outer opposing side surface is provided with a side projection that extends vertically, The aforementioned side projections are formed such that the end face in the direction of projection abuts against or is close to the outer slope, and a plurality of them are formed at predetermined intervals in the width direction of the outer opposing side surface. Fiber-reinforced plastic products.

3. The adhesive surface of the lower fiber-reinforced plastic part is further provided with an adhesive surface projection that protrudes upward, The aforementioned adhesive surface protrusions are formed in multiple locations at predetermined intervals in the width direction of the adhesive surface of the lower fiber-reinforced plastic component, and are arranged spaced apart from the resistance shape. A fiber-reinforced plastic product according to claim 1 or 2.

4. The fiber-reinforced plastic product according to claim 3, wherein the adhesive surface protrusion is arranged spaced apart from the adhesive surface of the upper fiber-reinforced plastic component.

5. The adhesive surface of the upper fiber-reinforced plastic part is further provided with an adhesive surface projection that protrudes downward, The aforementioned adhesive surface protrusions are formed in multiple locations at predetermined intervals in the width direction of the adhesive surface of the upper fiber-reinforced plastic component, and are arranged spaced apart from the resistance shape. A fiber-reinforced plastic product according to claim 1 or 2.

6. The aforementioned adhesive surface protrusions are positioned spaced apart from the adhesive surface of the lower fiber-reinforced plastic component. The fiber-reinforced plastic product according to claim 5.

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