Front structure of vehicle

Abstract

The invention provides a front structure of a vehicle. A front structure (22) made of a fiber-reinforced resin, which is integrally molded by injection molding and constitutes a part of the front part of a vehicle body, has a main body section (23) that has: a pair of side member sections (24A, 24B) that are provided at a distance from each other in the vehicle width direction (W) and extend in the vertical direction (Z); an upper member section (25) extending in the vehicle width direction and connecting the upper end sections of the pair of side member sections to each other; and a pair of stay sections (26A, 26B) that extend from the lower end of each of the pair of side member sections in a direction intersecting both the vehicle width direction and the vertical direction, and that are connected to the upper member section. The lower end edges (26b) of the pair of stay portions constitute a part of the outer peripheral edge (22a) of the front structure. Each part (24A, 24B, 25, 26A, 26B) of the main body part (23) is provided with a protruding strip part (33) which extends along the extending direction of the part (24A, 24B, 25, 26A, 26B).

Description

Technical Field

[0001] The present invention relates to a front structure of a vehicle. Background Art

[0002] Patent Document 1 describes a vehicle body front structure, a so-called radiator support, that is arranged on the front side of a radiator to support the radiator. This vehicle body front structure comprises an upper member extending in the vehicle width direction and a lower member extending in the vehicle width direction below the upper member. A pair of side members extending in the vertical direction of the vehicle body are connected to both ends of the upper and lower members in the vehicle width direction.

[0003] The upper member is provided with a locking structure of a hood for opening and closing an engine room of a vehicle, for example.

[0004] The radiator is mounted on a pair of side members.

[0005] The vehicle body front structure includes a center stay extending in the vertical direction to connect the upper member and the lower member, and a pair of side stays extending in a direction intersecting both the vehicle width direction and the vertical direction to connect the upper member and the side members.

[0006] The vehicle body front structure is integrally molded from fiber-reinforced resin, thereby ensuring the desired strength for the radiator support.

[0007] According to this vehicle body front structure, the central stay and a pair of side stays enhance the vertical strength of the vehicle body front structure, particularly the upper member, thereby imparting strength to the vehicle body front structure capable of withstanding strong vertical loads, for example, when the hood is closed.

[0008] Patent Document 1: International Publication No. 2012 / 153601 Summary of the Invention

[0009] However, such a front structure has a problem in that the structure becomes complicated because of the central stay and the side stays. Therefore, it is desired to improve the strength of the front structure by a simple structure.

[0010] Various aspects of a front structure of a vehicle for solving the above-mentioned problems will be described.

[0011] [Mode 1] A front structure of a vehicle, comprising a fiber-reinforced resin formed integrally by injection molding and constituting a portion of a front portion of a vehicle body, wherein, when the width direction and the up-down direction of the vehicle are referred to as the vehicle width direction and the up-down direction, and the upper side and the lower side in the up-down direction are referred to as the upper side and the lower side, the front structure of the vehicle has a main body, the main body having: a pair of side member portions spaced apart in the vehicle width direction and extending in the up-down direction; an upper member portion extending in the vehicle width direction and connecting the upper end portions of the pair of side member portions to each other; and a pair of stay portions extending from the lower end portions of the pair of side member portions in a direction intersecting both the vehicle width direction and the up-down direction and connected to the upper member portion, the lower end edges of the pair of stay portions constituting a portion of an outer peripheral edge of the front structure, and a concave-convex portion extending in a direction extending in the portion is provided at at least one of the side member portions, the upper member portion, and the stay portion.

[0012] When the front structure is integrally formed by injection molding, at the front end portion of the flow direction of the molten resin flowing in the mold cavity, the molten resin gushes out and produces a fountain flow phenomenon that flows toward the molding surface side of the mold. Therefore, the fibers in the molten resin move along the surface of the above-mentioned front end portion and flow toward the molding surface side of the mold. As a result, the orientation of the fibers in the skin layer on the molding surface side formed by cooling and solidifying earlier than the central part (core layer) of the molten resin filled into the mold cavity is easy to be consistent in the flow direction. The fiber-reinforced resin has increased strength relative to the direction of consistent fiber orientation, thereby increasing the strength of the front structure through the above-mentioned skin layer.

[0013] Here, according to the above structure, the surface area of the main body of the front structure is increased due to the concave and convex portions. As a result, the area of the skin layer is increased. As a result, the strength of the front structure can be further improved.

[0014] Furthermore, according to the above-described structure, the lower end edges of the pair of stays constitute a portion of the outer periphery of the front structural body. In other words, the front structural body does not include the lower member portion described in Patent Document 1, which connects the lower end portions of the pair of side members and extends in the vehicle width direction. Even in this case, if the main body is provided with the concave and convex portions, the strength of the front structural body is increased due to the above-described effect, thereby achieving sufficient strength for the component that constitutes part of the front portion of the vehicle body.

[0015] Therefore, the strength can be improved with a simple structure.

[0016] [Aspect 2] The front structure of the vehicle according to [Aspect 1], wherein the concavo-convex portion is continuously provided throughout the entire pair of side member portions, the upper member portion, and the pair of stay portions.

[0017] According to the above structure, the area of the skin layer can be increased throughout the entire main body, thereby further improving the strength of the front structure.

[0018] [Method 3] A front structure of a vehicle according to [Method 1] or [Method 2], wherein, when the front-to-back direction of the vehicle is referred to as the front-to-back direction, and the front and rear sides of the front-to-back direction are referred to as the front and rear sides, the main body has: a pair of side wall portions extending along the front-to-back direction and arranged at intervals from each other; and a bottom wall portion connecting the rear end portions of the pair of side wall portions to each other, the concave-convex portion is a convex strip portion provided on the bottom wall portion and protruding toward the front side, and a groove portion extending along the convex strip portion and opening toward the rear side is provided on the rear surface of the bottom wall portion.

[0019] According to the above configuration, the front structure can be made smaller in the front-rear direction compared to a case where the concavo-convex portion is a ridge portion that protrudes rearward from the bottom wall portion of the main body.

[0020] [Method 4] The front structure of the vehicle according to [Method 3], wherein a restriction portion is provided on the rear surface of the bottom wall portion, extending in a direction intersecting with the direction in which the groove portion extends and opposite to the bottom surface of the groove portion.

[0021] According to the above structure, a portion of long components such as a wiring harness, a washer hose, and a wire rod for a hood lock arranged at the front of the vehicle can be accommodated in the groove. Moreover, since the groove is made of resin and surrounded, the number of protective parts such as a corrugated tube that protects the long components can be reduced.

[0022] Furthermore, according to the above structure, a restriction portion is provided on the rear surface of the bottom wall portion, which is opposite to the bottom surface of the groove portion. Thus, the elongated member received in the groove portion is restricted from moving backward from the groove portion, thereby preventing the elongated member from falling out of the groove portion.

[0023] [Method 5] A front structure of a vehicle according to any one of [Method 1] to [Method 4], wherein a gate mark is formed on the main body, the gate mark being a mark of the gate when the front structure is injection molded, and the gate mark is formed in a portion different from the concave and convex portion.

[0024] When the front structure is integrally molded by injection molding, the molten resin flowing in the cavity near the gate does not flow in a single direction, making it difficult for the fibers in the skin layer to be oriented in the same direction. Therefore, if the gate mark is placed on the concave and convex portion, the strength improvement achieved by the concave and convex portion is difficult to achieve.

[0025] In this regard, according to the above configuration, the gate mark is formed in a portion of the main body that is different from the concavo-convex portion. Therefore, the strength of the main body can be appropriately improved by the concavo-convex portion.

[0026] [Method 6] A front structure of a vehicle according to [Method 5], wherein the main body has a shape symmetrical with respect to a virtual plane passing through a central portion of the upper member portion in the vehicle width direction and orthogonal to the vehicle width direction, and the gate mark is located in the central portion.

[0027] According to the above structure, when the front structure is integrally molded by injection molding, molten resin is filled into the mold cavity from the gate located in the center. Here, the main body of the front structure has a symmetrical shape relative to the above-mentioned virtual plane. Therefore, the molten resin in the mold cavity tends to flow in a constant flow direction, flowing from the center of the mold cavity for molding the upper member portion toward the outside in the vehicle width direction and flowing into the mold cavity for molding the side member portion and the stay portion. As a result, in the epidermis, the orientation of the fibers tends to be consistent in the above-mentioned flow direction. Therefore, the strength of the front structure can be further improved.

[0028] [Method 7] A front structure of a vehicle according to [Method 6], wherein the concave-convex portion is provided on the upper member portion and a pair of strut portions, the main body portion has a weld portion formed by collision of molten resins when the front structure is integrally molded by injection molding, and the weld portion is formed only on the side member portion.

[0029] The upper member and the pair of stays have portions extending in the vehicle width direction. Therefore, when the vehicle body twists during cornering, for example, loads in the vehicle width direction are likely to act on the upper member and the pair of stays. Therefore, the upper member and the stays are required to have strength that can withstand these loads.

[0030] However, when the front structure is integrally molded by injection molding, the fibers in the front structure change their orientation due to melting after diversion within the mold cavity. Consequently, the fibers become oriented in a direction that intersects the flow direction of the molten resin within the mold cavity. Consequently, the welded portion tends to be weaker than the rest of the structure.

[0031] In this regard, according to the above structure, the welded portions are formed only on the side members. Therefore, the strength of the upper member and the pair of stays is not reduced by the welded portions. Furthermore, the concave-convex portions are provided on the upper member and the pair of stays, thereby increasing the strength of the upper member and the pair of stays.

[0032] Therefore, the strength of the front structure can be further improved.

[0033] Effects of the Invention

[0034] According to the present invention, the strength can be improved with a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a perspective view showing the front portion of a vehicle equipped with a front structure according to one embodiment.

[0036] Figure 2 Yes Figure 1 Rear view of the front structure.

[0037] Figure 3 It is along Figure 2 Cross-sectional view of line 3-3.

[0038] Figure 4 It is a schematic diagram showing the orientation of fibers in the skin layer and the core layer.

[0039] Figure 5 This is a schematic diagram showing the orientation of fibers in the skin layer including the welded portion. DETAILED DESCRIPTION

[0040] Below, refer to Figures 1 to 5 An embodiment of a front structure of a vehicle will be described. In this embodiment, the present invention is embodied as a front structure 22 of an automobile 10 .

[0041] Hereinafter, the front-to-back direction of the vehicle 10 will be referred to simply as the front-to-back direction X, and the front and rear sides of the front-to-back direction X will be referred to simply as the front side and the rear side. The vehicle width direction of the vehicle 10 will be referred to as the vehicle width direction W. The up-down direction of the vehicle 10 when the vehicle 10 is on a horizontal surface will be referred to simply as the up-down direction Z, and the upper and lower sides of the up-down direction Z will be referred to simply as the upper side and the lower side.

[0042] <Front Structure 22>

[0043] like Figure 1 As shown, an exterior member 13 is provided on the front portion 11 of the automobile 10 , which integrally forms an outer shell of a portion below a pair of headlights 12 of the front portion 11 .

[0044] A front structure 22 is provided on the rear side of the exterior member 13 . The front structure 22 is attached to the front ends of a pair of front side members (not shown) of the vehicle body 20 and constitutes a part of the front portion 21 of the vehicle body 20 .

[0045] The front structure 22 is made of fiber-reinforced resin and is integrally formed by injection molding. As the fiber-reinforced resin, for example, a glass fiber-reinforced resin in which glass fibers are mixed with polyethylene resin can be used.

[0046] (Main body 23)

[0047] like Figure 2 As shown, the front structure 22 includes a main body 23 having a pair of side member portions 24A, 24B, an upper member portion 25, and a pair of stay portions 26A, 26B.

[0048] The pair of side members 24A and 24B are portions extending in the up-down direction Z and provided at a distance from each other in the vehicle width direction W.

[0049] The upper member portion 25 is a portion extending in the vehicle width direction W and connecting upper end portions of the pair of side member portions 24A, 24B.

[0050] The stay portion 26A is a portion that extends from the lower end portion of the side member portion 24A in a direction intersecting both the vehicle width direction W and the up-down direction Z and is connected to the upper member portion 25 .

[0051] The stay portion 26B is a portion that extends from the lower end portion of the side member portion 24B in a direction intersecting both the vehicle width direction W and the up-down direction Z and is connected to the upper member portion 25 .

[0052] The pair of stay portions 26A and 26B constitute an arch portion 26 as a whole, the arch portion 26 extending in a curved shape such that the center portion in the vehicle width direction W is convex upward.

[0053] An upper end edge 26 a of the arch portion 26 is connected to a lower end edge 25 a of the upper member portion 25 at a center portion of the upper member portion 25 in the vehicle width direction W.

[0054] The lower end edge 26 b of the arched portion 26 constitutes a portion of the outer peripheral edge 22 a of the front structure 22 .

[0055] The main body portion 23 has a shape that is symmetrical with respect to a virtual plane V that passes through the center portion of the upper member portion 25 in the vehicle width direction W and is perpendicular to the vehicle width direction W.

[0056] (Side wall portion 31, bottom wall portion 32)

[0057] like Figure 2 and Figure 3As shown, the main body 23 has a pair of side walls 31 and a bottom wall 32 .

[0058] The pair of side wall portions 31 extend in the front-rear direction X and are arranged at intervals from each other in a direction perpendicular to both the front-rear direction X and the extending direction of the portions 24A, 24B, 25, and 26 of the main body 23 (see FIG. Figure 2 ).

[0059] The bottom wall portion 32 connects the rear end portions of the pair of side wall portions 31 (see Figure 3 ).

[0060] The bottom wall 32 is provided with a convex stripe 33 that protrudes toward the front. Furthermore, a groove 34 that opens toward the rear is provided on the rear surface 32b of the bottom wall 32. The groove 34 is a portion formed integrally with the convex stripe 33 on both the front and rear surfaces.

[0061] like Figure 2 As shown, the ridges 33 extend along the extending direction of the portions 24A, 24B, 25, and 26 of the main body 23. The ridges 33 are continuously provided throughout the portions 24A, 24B, 25, and 26 of the main body 23.

[0062] The groove portion 34 is configured to be able to house a portion of a long member disposed in the front portion 11 of the automobile 10. Figure 3 In FIG, a wire harness 14 as an example of an elongated member is shown by a two-dot chain line. As the elongated member, in addition to the wire harness, for example, a washer hose, a wire material of a hood lock, etc. can be cited.

[0063] like Figure 2 and Figure 3 As shown, a restriction portion 35 is provided on the rear surface 32b of the bottom wall portion 32. In this embodiment, a pair of restriction portions 35 are provided in the upper member portion 25 at intervals in the vehicle width direction W (see FIG. Figure 2 ).

[0064] like Figure 3 As shown, the restricting portion 35 includes a base end portion 35a that protrudes rearward from the rear surface 32b, and an opposing wall portion 35b that extends from the base end portion 35a in a direction (in this embodiment, the vertical direction Z) that intersects the extending direction of the groove portion 34. The opposing wall portion 35b opposes the bottom surface 34a of the groove portion 34 in the front-to-back direction X.

[0065] (Gate trace 41, weld portion 42)

[0066] like Figure 2As shown, the main body 23 has a gate mark 41 which is a gate mark when the front structure 22 is injection-molded, and a weld portion 42 which is formed by collision of molten resins.

[0067] The gate mark 41 is located in the center portion of the bottom wall portion 32 of the upper member portion 25 in the vehicle width direction W. The gate mark 41 is formed in a portion different from the ridge portion 33 .

[0068] In this embodiment, the welded portion 42 is formed only on the pair of side members 24A and 24B. Each side member 24A and 24B has a welded portion 42 formed at one location. The welded portion 42 extends in a direction intersecting the direction in which the groove 34 extends (in this embodiment, the vehicle width direction W).

[0069] (Skin layer 51, core layer 52)

[0070] like Figure 4 As shown, a pair of side wall portions 31 and a bottom wall portion 32 are composed of a pair of skin layers 51 and a core layer 52 disposed between the pair of skin layers 51. Figure 4 The skin layer 51 and the core layer 52 of the bottom wall portion 32 are shown in FIG.

[0071] The skin layer 51 is a portion on the molding surface side formed by cooling and solidifying the molten resin in the cavity earlier than the center portion (core layer 52 ) when the front structure 22 is integrally molded by injection molding.

[0072] In the pair of skin layers 51 , the fibers 53 are oriented more in the flow direction R of the molten resin flowing in the cavity (in this embodiment, the extending direction of the portions 24A, 24B, 25 , and 26 of the main body 23 ) than in the core layer 52 .

[0073] like Figure 5 As shown, in the skin layer 51 of the welded portion 42 , the fibers 53 are oriented in a direction intersecting the flow direction R (the vehicle width direction W in this embodiment).

[0074] <Function of this embodiment>

[0075] Next, the operation of this embodiment will be described.

[0076] When the front structure 22 is integrally molded by injection molding, a fountain flow phenomenon occurs in which the molten resin flows out from the front end of the flow direction R of the molten resin flowing in the mold cavity and flows toward the molding surface of the mold. Therefore, the fibers 53 in the molten resin move along the surface of the front end and flow toward the molding surface of the mold. Figure 4As shown, in the skin layer 51 on the molding surface side, formed by cooling and solidifying earlier than the central portion (core layer 52) of the molten resin filled into the mold cavity, the fibers 53 are easily oriented in the flow direction R (the direction in which the portions 24A, 24B, 25, and 26 extend). The fiber-reinforced resin improves its strength in the direction in which the fibers 53 are oriented. Therefore, the skin layer 51 improves the strength of the front structure 22.

[0077] Here, according to the above structure, the surface area of the main body 23 of the front structure 22 is increased by the ridges 33. This increases the area of the skin layer 51. As a result, the strength of the front structure 22 can be further improved.

[0078] Furthermore, according to the above-described structure, the lower end edge 26b of the arched portion 26 constitutes a portion of the outer peripheral edge 22a of the front structural body 22. In other words, the front structural body 22 does not include the lower member portion described in Patent Document 1, which connects the lower end portions of the pair of side member portions 24A and 24B and extends in the vehicle width direction W. Even in this case, the provision of the ridge portion 33 on the main body portion 23 enhances the strength of the front structural body 22 due to the aforementioned effect, thereby ensuring sufficient strength as a component constituting a portion of the front portion 21 of the vehicle body 20.

[0079] <Effects of this embodiment>

[0080] Next, the effects of this embodiment will be described.

[0081] (1) The front structure 22 includes a main body 23 having a pair of side members 24A and 24B spaced apart in the vehicle width direction W and extending in the vertical direction Z; an upper member 25 extending in the vehicle width direction W and connecting the upper ends of the pair of side members 24A and 24B; and a pair of stays 26A and 26B extending from the lower ends of each of the pair of side members 24A and 24B in a direction intersecting both the vehicle width direction W and the vertical direction Z and connected to the upper member 25. The lower end edges 26b of the pair of stays 26A and 26B constitute a portion of the outer peripheral edge 22a of the front structure 22. Each of the pair of side members 24A and 24B, the upper member 25, and the pair of stays 26A and 26B is provided with a ridge 33 serving as a concave-convex portion extending in the direction in which the portion extends.

[0082] According to this structure, the above-mentioned effects can be achieved.

[0083] Therefore, the strength of the front structure 22 can be improved with a simple structure.

[0084] (2) The convex stripe portion 33 as the concave-convex portion is continuously provided over the entire pair of side member portions 24A, 24B, the upper member portion 25, and the pair of stay portions 26A, 26B.

[0085] According to such a structure, the area of the skin layer 51 can be increased over the entire body portion 23. Therefore, the strength of the front structure 22 can be further improved.

[0086] (3) The main body 23 includes a pair of side walls 31 extending in the front-to-rear direction X and spaced apart from each other, and a bottom wall 32 connecting the rear ends of the pair of side walls 31. A ridge 33, which serves as a concave-convex portion, is provided on the bottom wall 32 and projects toward the front. A groove 34 is provided on the rear surface 32b of the bottom wall 32, extending along the ridge 33 and opening toward the rear.

[0087] According to this configuration, the size of the front structure 22 in the front-rear direction X can be reduced compared to a case where the ridges 33 protrude rearward from the bottom wall 32 of the main body 23 .

[0088] (4) A restriction portion 35 is provided on the rear surface 32b of the bottom wall portion 32, extending in a direction intersecting the direction in which the groove portion 34 extends (the up-down direction Z in this embodiment) and facing the bottom surface 34a of the groove portion 34 in the front-to-back direction X.

[0089] With this configuration, a portion of the wire harness 14 routed in the front portion 11 of the vehicle 10 can be accommodated in the groove 34. Since the wire harness 14 is surrounded by the resin groove, the number of protective members such as corrugated tubes typically used to protect the wire harness 14 can be reduced.

[0090] Furthermore, according to the above configuration, the restricting portion 35 is provided on the rear surface 32b of the bottom wall portion 32, facing the bottom surface 34a of the groove portion 34. Therefore, the wire harness 14 housed in the groove portion 34 is restricted from moving rearward from the groove portion 34. Consequently, the wire harness 14 can be prevented from falling out of the groove portion 34.

[0091] (5) The main body 23 has a gate mark 41 formed therein. The gate mark 41 is a mark of a gate formed when the front structure 22 is injection-molded. The gate mark 41 is formed in a portion different from the ridge portion 33 .

[0092] When the front structure 22 is integrally molded by injection molding, the flow direction R of the molten resin flowing in the cavity near the gate is not uniform, so it is difficult for the fibers 53 of the skin layer 51 to be oriented in the same direction. Therefore, if the gate mark 41 is provided on the ridge portion 33, it is difficult to achieve the improvement in strength due to the ridge portion 33.

[0093] In this regard, according to the above configuration, the gate mark 41 is formed in a portion of the main body 23 that is different from the ridge portion 33. Therefore, the strength of the main body 23 can be appropriately improved by the ridge portion 33.

[0094] (6) The main body portion 23 has a symmetrical shape with respect to a virtual plane V passing through the center portion of the upper member portion 25 in the vehicle width direction W and perpendicular to the vehicle width direction W. The gate mark 41 is located in the center portion.

[0095] According to this structure, when the front structure 22 is integrally molded by injection molding, molten resin is filled into the cavity from the gate located in the above-mentioned central portion. Here, the main body 23 of the front structure 22 has a shape symmetrical with respect to the virtual plane V. Therefore, the molten resin in the cavity tends to flow outward from the central portion of the cavity for molding the upper member portion 25 in the vehicle width direction W and flow into the cavity for molding the side member portion 24A (24B) and the stay portion 26A (26B) in a constant flow direction R. As a result, the orientation of the fibers 53 in the skin layer 51 tends to be consistent in the above-mentioned flow direction R. Therefore, the strength of the front structure 22 can be further improved.

[0096] (7) The ridges 33 are provided on the upper member 25 and the pair of stays 26A and 26B. The main body 23 has welded portions 42 formed by the collision of molten resins during the integral molding of the front structure 22 by injection molding. The welded portions 42 are formed only on the pair of side member 24A and 24B.

[0097] The upper member portion 25 and the pair of stay portions 26A and 26B have portions extending in the vehicle width direction W. Therefore, when the vehicle body 20 is twisted, for example when the automobile 10 turns, loads in the vehicle width direction W are likely to act on the upper member portion 25 and the pair of stay portions 26A and 26B. Therefore, the upper member portion 25 and the pair of stay portions 26A and 26B are required to have strength capable of withstanding such loads.

[0098] However, when the front structure 22 is integrally molded by injection molding, the molten resins that have been divided in the mold cavity collide with each other in the front structure 22 to form a weld 42. In the weld 42, the collision changes the flow direction R (in this embodiment, the direction in which the side member parts 24A and 24B extend, that is, the vertical direction Z) and thus changes the orientation direction of the fibers 53. Therefore, Figure 5 As shown, the fibers 53 are oriented in a direction (in this embodiment, the vehicle width direction W) that intersects the flow direction R of the molten resin flowing in the cavity.

[0099] In this regard, according to the above-described structure, the welded portions 42 are formed only on the pair of side member portions 24A, 24B. Therefore, the strength of the upper member portion 25 and the pair of stay portions 26A, 26B is not reduced by the welded portions 42. Furthermore, the ridges 33 are provided on the upper member portion 25 and the pair of stay portions 26A, 26B, thereby enhancing the strength of the upper member portion 25 and the pair of stay portions 26A, 26B.

[0100] Therefore, the strength of the front structure 22 can be further improved.

[0101] <Change Example>

[0102] This embodiment can be implemented with modifications as follows: This embodiment and the following modifications can be implemented in combination with each other within a range that does not technically conflict.

[0103] The front structure 22 is not limited to forming the gate marks 41 at the positions shown in the example of this embodiment. If the welded portions 42 are formed only on the pair of side member portions 24A and 24B, the placement and number of the gate marks 41 can be modified as appropriate. For example, the front structure 22 may have multiple gate marks 41 arranged at intervals along the direction in which the various portions of the main body 23 extend.

[0104] As shown in the example of this embodiment, the front structure 22 is not limited to having the welded portion 42 provided only on the pair of side member portions 24A and 24B. The welded portion 42 may also be provided on the upper member portion 25 or the arch portion 26. This configuration increases the freedom in the placement of the gate when the front structure 22 is integrally molded by injection molding.

[0105] Regarding the front structure 22 , the gate mark 41 may be located on the convex line portion 33 .

[0106] In this embodiment, the pair of stays 26A and 26B integrally constitute the arch portion 26. However, the pair of stays 26A and 26B may be provided independently of each other. More specifically, the stays 26A and 26B are not limited to being connected to the upper member portion 25 at the center of the upper member portion 25 in the vehicle width direction W. They may also be connected to the upper member portion 25 at positions separated from each other in the vehicle width direction W. In this case, the protrusions 33 formed on the pair of stays 26A and 26B may be connected to the protrusions 33 formed on the upper member portion 25.

[0107] The main body 23 is not limited to a symmetrical shape with respect to the virtual plane V. It may be an asymmetrical shape with respect to the virtual plane V as long as it includes a pair of side member portions 24A, 24B, an upper member portion 25, and a pair of stay portions 26A, 26B.

[0108] The arrangement and number of the restricting portions 35 are not limited to those illustrated in this embodiment and may be appropriately modified depending on the type, number, and position of the elongated members disposed relative to the groove 34. For example, the restricting portions 35 may be provided on the pair of side members 24A and 24B and the pair of stays 26A and 26B. Furthermore, the number of restricting portions 35 may be one or three or more. Furthermore, the restricting portions 35 may be omitted.

[0109] The front structure 22 is not limited to the case where the ridges 33 are provided only on the bottom wall 32 as shown in the present embodiment. For example, the ridges 33 may be provided on at least one of the pair of side walls 31 .

[0110] The ridges 33 do not need to extend continuously over the entire body 23. That is, the front structure 22 may be formed so that a plurality of ridges 33 are arranged at intervals along the direction in which the portions 24A, 24B, 25, 26A, and 26B of the body 23 extend.

[0111] The ridges 33 are not limited to being provided at all locations on the pair of side members 24A, 24B, the upper member 25, and the pair of stays 26A, 26B, as exemplified in this embodiment. Specifically, the front structure 22 may be formed such that the ridges 33 are provided at at least one location on the side members 24A, 24B, the upper member 25, the stays 26A, and the stays 26B.

[0112] The concave-convex portion of the present invention is not limited to the ridge 33 shown as an example in this embodiment. For example, the concave-convex portion may be a ridge projecting rearward from the rear surface 32b of the bottom wall 32. In this case, a groove extending along the ridge and opening forward is provided on the front surface 32a of the bottom wall 32.

[0113] The front structure 22 may support the headlight 12 and the exterior member 13 , and may be arranged in front of the radiator to support the radiator.

[0114] A hood lock may be provided on the upper member portion 25 of the front structure 22 .

[0115] The front structure according to the present invention is not limited to the front structure 22 of the automobile 10 , but is applicable to any front structure that constitutes a part of the front portion of a vehicle body.

[0116] Description of the label

[0117] R…flow direction

[0118] V…Virtual Plane

[0119] W…vehicle width direction

[0120] X…front and rear direction

[0121] Z…up and down direction

[0122] 10…Cars

[0123] 11…Front

[0124] 12…Headlight

[0125] 13…Exterior parts

[0126] 14…Wire harness

[0127] 20…Body

[0128] 21…Front

[0129] 22…Front structure

[0130] 22a…outer periphery

[0131] 23…Main body

[0132] 24A, 24B…side member

[0133] 25…Upper component

[0134] 25a…end edge

[0135] 26…Arch

[0136] 26A, 26B…stays

[0137] 26a, 26b…end edge

[0138] 31…Side wall

[0139] 32...Bottom wall part

[0140] 32a…front surface

[0141] 32b…back surface

[0142] 33…Protruding part

[0143] 34…groove

[0144] 34a… bottom

[0145] 35…Restriction

[0146] 35a…base end

[0147] 35b ... opposite wall

[0148] 41…Gate traces

[0149] 42…Welding section

[0150] 51…epidermis

[0151] 52…core layer

[0152] 53…Fiber

Claims

1. A front structure of a vehicle, the front structure being a fiber-reinforced resin structure integrally formed by injection molding and constituting a portion of the front portion of a vehicle body, wherein: When the width direction and the up-down direction of the vehicle are simply referred to as the vehicle width direction and the up-down direction, and the upper side and the lower side of the up-down direction are simply referred to as the upper side and the lower side, The front structure of the vehicle has a main body. The main body has: a pair of side members spaced apart in the vehicle width direction and extending in the up-down direction; an upper member portion extending in the vehicle width direction and connecting upper end portions of the pair of side member portions to each other; and a pair of stays extending from respective lower ends of a pair of side members in a direction intersecting both the vehicle width direction and the up-down direction and connected to the upper member; The lower end edges of the pair of stays constitute a portion of the outer periphery of the front structure. A concave-convex portion extending in a direction in which the portion extends is provided at at least one of the side member portion, the upper member portion, and the stay portion.

2. The front structure of the vehicle according to claim 1, wherein: The concave-convex portion is continuously provided over the entire pair of side member portions, the upper member portion, and the pair of stay portions.

3. The front structure of the vehicle according to claim 1 or 2, wherein: When the front-rear direction of the vehicle is referred to as the front-rear direction, and the front side and the rear side of the front-rear direction are referred to as the front side and the rear side, The main body has a pair of side walls extending in the front-rear direction and arranged at intervals from each other, and a bottom wall connecting rear ends of the pair of side walls. The concave-convex portion is a convex strip portion provided on the bottom wall portion and protruding toward the front side. A groove portion extending along the ridge portion and opening toward the rear side is provided on the rear surface of the bottom wall portion.

4. The front structure of the vehicle according to claim 3, wherein: A restricting portion is provided on a rear surface of the bottom wall portion. The restricting portion extends in a direction intersecting with a direction in which the groove portion extends and faces a bottom surface of the groove portion.

5. The front structure of the vehicle according to claim 1, wherein: A gate mark is formed on the main body, which is a mark of a gate when the front structure is injection molded. The gate mark is formed at a portion different from the concavo-convex portion.

6. The front structure of the vehicle according to claim 5, wherein: The main body portion has a symmetrical shape with respect to a virtual plane passing through the center portion of the upper member portion in the vehicle width direction and perpendicular to the vehicle width direction. The gate mark is located in the central portion.

7. The front structure of the vehicle according to claim 6, wherein: The concave and convex parts are provided on the upper member part and the pair of stay parts. The main body has a welded portion formed by collision of molten resins when the front structure is integrally molded by injection molding. The welded portion is formed only on the side member portion.

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