Resin external plate

Abstract

To provide a resin external plate structure which can establish a mold structure without using a slide core, and prevents generation of distortion on a design surface.SOLUTION: In a side door 1, undercut parts 31 to 33 are provided on the lower side and the one side of an outer panel 3 (corresponding to resin external plate) composed of a molding of a resin, covers 34 to 36 for covering the undercut parts 31 to 33 are provided through integral hinges 37 to 39, and the covers 34 to 36 are in attitudes to extend downward from the lower part or the side part of the outer panel 3 when the outer panel 3 is molded, and are in attitudes so as to be bent inward from the lower side and the one side of the outer panel 3 so as to cover the undercut parts 31 to 33 when being assembled on the inner panel 2 of the side door 1.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a resin skin panel. [Background technology]

[0002] For example, Patent Document 1 describes that "in a resin door panel structure in which the peripheral edges of overlapping door inner and outer panels are joined together with screw members, interlocking convex and concave portions are formed on at least the front and rear edges of both panels, and the peripheral edges of both panels are fixed with screw members that pass through the concave and convex portions," and that "external forces can be prevented from causing the door outer panel to change position (shift) relative to the door inner panel." [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 06-255367 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above Patent Document 1, when undercut portions are formed on the side and bottom portions of the door panel, it is possible that a slide core or the like cannot be set, and there is a concern that the mold structure will not be established.

[0005] In view of the above circumstances, the present invention aims to provide a resin outer panel that allows a mold structure to be established without using a slide core and that does not cause distortion on the design surface. [Means for solving the problem]

[0006] The present invention is a resin outer panel used in a vehicle and molded from resin, which has an undercut portion on one side and a cover for covering this undercut portion attached via an integral hinge, the cover being oriented so as to extend outward from the one side of the resin outer panel when the resin outer panel is molded, and being bent in one direction in the plate thickness direction from the one side of the resin outer panel so as to cover and conceal the undercut portion when the panel is assembled to a predetermined location on the vehicle.

[0007] With this configuration, when molding the resin outer panel, the cover is molded in a position where it hangs down from the resin outer panel, making it possible to easily remove the resin outer panel from the molding die.Furthermore, when the molded resin outer panel is bent from the one side toward one side in the thickness direction, the integral hinge can be used as a bending fulcrum, preventing distortion from occurring on the outer surface (design surface) of the resin outer panel, thereby achieving high quality of the resin outer panel.

[0008] The resin outer panel is the outer panel of an inner panel and an outer panel that constitute a side door of a vehicle, and an undercut portion is provided on at least one of the bottom edge and one side edge of the outer panel. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a resin outer panel that allows a mold structure to be established without using a slide core and that does not cause distortion on the design surface. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view of an embodiment of a side door using a resin outer panel according to the present invention, showing a state in which first to third undercut portions are not covered with first to third covers. [Figure 2] 2 is a perspective view showing a state in which first to third undercut portions in FIG. 1 are covered with first to third covers. FIG. [Figure 3] (a) is a cross-sectional view of the line (3a)-(3a) in Figure 1, seen from the direction of the arrow; (b) is a cross-sectional view of the line (3b)-(3b) in Figure 1, seen from the direction of the arrow; and (c) is a cross-sectional view of the line (3c)-(3c) in Figure 2, seen from the direction of the arrow. DETAILED DESCRIPTION OF THE INVENTION

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0012] An embodiment of the present invention is shown in Figures 1 to 3. These figures show an example of a side door 1, which is an exterior part of a vehicle.

[0013] The side door 1 is mainly composed of an inner panel 2, an outer panel 3, etc., and is disposed above a rocker molding 4, which is part of the vehicle body frame.

[0014] The inner panel 2 and the outer panel 3 are manufactured by molding resin. The inner panel 2 is formed thinner than the outer panel 3. The outer panel 3 is an example of a resin outer panel according to the present invention.

[0015] As shown in Fig. 1, undercut portions 31 to 33 are provided in three places on the lower side of the outer panel 3. Generally, an undercut refers to a shaped portion (uneven shape) that prevents a resin molded product from being released from the molding die in the opening and closing direction of the molding die when the molded product is removed.

[0016] The undercut portion 31 near the front will be referred to as the first undercut portion, the undercut portion 32 in the middle will be referred to as the second undercut portion, and the undercut portion 33 at the rear end will be referred to as the third undercut portion.

[0017] As shown in FIG. 2, the first to third undercut portions 31 to 33 are cutouts, and are covered with first to third covers 34 to 36, respectively.

[0018] As shown in FIG. 2, the first and second covers 34, 35 are formed in a horizontally long rectangular shape in a side view, and the third cover 36 is formed in a vertically long rectangular shape in a side view.

[0019] As shown in FIG. 3, the first to third covers 34 to 36 are integrally provided to the outer panel 3 via integral hinges 37 to 39.

[0020] The integral hinges 37 to 39 connect the first to third covers 34 to 36 to the outer panel 3, and serve as fulcrums for bending when the first to third covers 34 to 36 are rotated or bent relative to the outer panel 3.

[0021] The integral hinges 37 to 39 are formed thinner than the outer panel 3, and contribute to preventing distortion from occurring on the outer surface of the outer panel 3 when the first and second covers 34, 35 are rotated or bent.

[0022] 3, flanges 341, 351 are provided at the tips of the first and second covers 34, 35, and a flange 361 is provided on one side of the third cover 36. The flanges 341, 351, 361 are bent in a direction perpendicular to the first to third covers 34-36.

[0023] When the outer panel 3 is molded, the first to third covers 34 to 36 are in a downward hanging position as shown in Figure 1, and when the outer panel 3 is assembled to the inner panel 2, they are bent so as to be perpendicular to each other as shown in Figure 2.

[0024] Locking portions 342, 352, 362 are provided at both longitudinal ends of the first and second covers 34, 35 and at the tip of the third cover 36. Further, locked portions 311, 321, 331 to which the locking portions 342, 352, 362 are locked are provided near the first to third undercut portions 31-33.

[0025] The locking portions 342, 352, and 362 are curved pieces, and the locked portions 311, 321, and 331 are rectangular pieces. The curved pieces of the locking portions 342, 352, and 362 are designed to bend elastically.

[0026] However, as described above, when the outer panel 3 is provided with the first to third undercut portions 31 to 33 and the first to third covers 34 to 36 for covering the first to third undercut portions 31 to 33, if an attempt is made to mold the first to third covers 34 to 36 in a bent position as shown in Figure 2, the molding die for the outer panel 3 cannot be released because the first and second covers 34, 35 have flanges 341, 351 at their tips and the third cover 36 has flange 361 on one side.

[0027] Although not shown, the molding dies for the outer panel 3 are disposed in front of and behind the outer panel 3 in the thickness direction, and therefore, after molding, the molding dies must be released by being pulled away from the outer panel 3 in the front or rear direction in the thickness direction. However, as shown in Figure 2, flanges 341, 351, 361 provided on the first to third covers 34 to 36 of the outer panel 3 protrude in a direction perpendicular to the direction in which the molding dies are pulled away, making it impossible to release the molding dies.

[0028] In response to this, the inventors of the present application have conceived that if the first to third covers 34 to 36 are molded in a downward hanging position as shown in Figure 1, the flanges 341, 351, 361 of the first to third covers 34 to 36 will protrude in a direction perpendicular to the main body portion of the outer panel 3 and the first to third covers 34 to 36, and therefore it will be possible to release the molding die (not shown) from the outer panel 3 by pulling it away from the outer panel 3 in the front or rear direction in the plate thickness direction.

[0029] In this case, after the outer panel 3 is formed, the first to third covers 34 to 36 must be bent as shown in Fig. 2. The inventors of the present application have confirmed that when the outer panel 3 is bent, if integral hinges 37 to 39 are provided, no distortion occurs around the bent portion on the outer surface (design surface) of the outer panel 3, but that if integral hinges 37 to 39 are not provided, the distortion occurs.

[0030] Based on this knowledge, in this embodiment, when the outer panel 3 is molded, the first to third covers 34 to 36 are oriented so as to hang down from the outer panel 3 via integral hinges 37 to 39.

[0031] Incidentally, in the case of the outer panel 3 of this embodiment, after molding, the first to third covers 34 to 36 hang down from the outer panel 3 via integral hinges 37 to 39 as shown in FIG.

[0032] To remove the molded product, i.e., the outer panel 3, from the molding dies after molding, although this is not shown, the molding dies arranged in front of and behind the outer panel 3 in the thickness direction are removed from the outer panel 3 in the front or rear direction in the thickness direction. At this time, as shown in Fig. 1, the flanges 341, 351, 361 provided on the tips of the first to third covers 34 to 36 of the outer panel 3 are parallel to the direction in which the molding dies are removed, making it possible to remove the molding dies.

[0033] When the outer panel 3 formed in this manner is combined with the inner panel 2 to manufacture the side door 1, the first to third covers 34 to 36 of the outer panel 3 are bent as shown in Figure 2, and then the locking portions 342, 352, 362 of the first to third covers 34 to 36 are bent to lock onto the locked portions 311, 321, 331 near the first to third undercut portions 31 to 33, thereby covering and concealing the first to third undercut portions 31 to 33 with the first to third covers 34 to 36.

[0034] As described above, the outer panel 3 as a resin outer panel in an embodiment to which the present invention is applied has first to third undercut portions 31 to 33 on its bottom edge and one side edge, and is shaped so that first to third covers 34 to 36 that cover and conceal the first to third undercut portions 31 to 33 are provided via integral hinges 37 to 39, and when the outer panel 3 is molded, the first to third covers 34 to 36 are molded in a position that hangs down from the outer panel 3.

[0035] This makes it possible to prevent distortion from occurring on the outer surface (design surface) of the molded outer panel 3, thereby making it possible to produce a high-quality outer panel 3, and ultimately to improve the quality of the side door 1 manufactured using the high-quality outer panel 3.

[0036] The present invention is not limited to the above-described embodiments, but can be modified as appropriate within the scope of the claims and the equivalents thereof.

[0037] (1) In the above embodiment, the number and shapes of the first to third undercut portions 31 to 33 and the first to third covers 34 to 36 are not particularly limited.

[0038] (2) In the above embodiment, the resin outer panel is an example of a side door 1 for a vehicle, but the present invention is not limited to this.

[0039] For example, the resin outer panel may be any of the exterior parts of a vehicle, such as a hood, a bumper, a fender, a rail, a quarter, a back door, and the like. [Industrial Applicability]

[0040] The present invention can be suitably used in a resin outer panel structure. [Explanation of symbols]

[0041] 1 side door 2 Inner Panel 3 Outer panel 31 First undercut section 311 Locked part 32 Second undercut section 321 Locked part 33 Third undercut section 331 Locked part 34 First Cover 341 Tsuba 342 Locking part 35 Second Cover 351 Tsuba 352 Locking part 36 Third Cover 361 Tsuba 362 Locking part 37~39 Integral hinge 4. Rockamor

Claims

[Claim 1] A resin outer panel used in a vehicle and molded from resin, An undercut portion is provided on one side of the door, and a cover for covering the undercut portion is provided via an integral hinge. The cover is positioned so as to extend outward from the one side of the resin outer panel when the resin outer panel is molded, and is bent in one direction in the plate thickness direction from the one side of the resin outer panel so as to cover and conceal the undercut portion when the resin outer panel is assembled to a predetermined location on the vehicle.

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