Resin member

Abstract

To provide a resin member that is less likely to be disassembled even when subjected to an unintended load, and less likely to come off from a structure.SOLUTION: A resin member includes a first member and a second member facing the first member. The first member includes an external connection portion for connecting the resin member to an external structure, an internal connection portion that is spaced apart from the external connection portion and connects the first member and the second member, and a fragile portion provided around the internal connection portion.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a resin member. [Background technology]

[0002] Patent Documents 1 to 3 disclose resin components that are attached to vehicles. For example, Patent Document 2 discloses a spoiler that is attached to a vehicle to straighten air while the vehicle is moving. In Patent Document 2, the spoiler is a molded product made of thermoplastic resin. Such a spoiler includes an outer member that is the main design element, and an inner member disposed on the rear side of the outer member. The outer member is joined to the inner member by vibration welding. The inner member has a mounting seat that holds a retainer such as a clip on the vehicle body. In this way, the structure on the rear side of the outer member is minimized, preventing molding defects such as sink marks that appear on the design surface of the outer member due to the structure. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-143757 [Patent Document 2] Japanese Patent Application Laid-Open No. 2014-012471 [Patent Document 3] Japanese Patent Application Laid-Open No. 2013-067319 Summary of the Invention [Problem to be solved by the invention]

[0004] As described above, a resin member may include a member that serves as a design element (e.g., an outer member) and a member that attaches the outer member to a structure (e.g., an inner member). It is desirable that the resin member does not disintegrate and fall off from the structure even when subjected to an unintended load, such as a collision with an object. The present disclosure provides a resin member that is unlikely to disintegrate and fall off from the structure even when subjected to a load. [Means for solving the problem]

[0005] A resin member according to one embodiment of the present disclosure includes a first member and a second member facing the first member, the first member having an external connecting portion for connecting the resin member to an external structure, an internal connecting portion spaced from the external connecting portion for connecting the first member to the second member, and a fragile portion provided around the internal connecting portion. [Effects of the Invention]

[0006] According to the present disclosure, it is possible to provide a resin member that is unlikely to disintegrate or fall off from a structure even when subjected to an unintended load due to a collision of an object or the like. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. 10 is a cross-sectional view illustrating the advantages of the weakened portion. [Figure 5] FIG. 10 is an exploded perspective view showing a resin member according to another embodiment. [Figure 6] FIG. 10 is an exploded perspective view showing a resin member according to still another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings.

[0009] As shown in Fig. 1, in this embodiment, the resin member 2 is a spoiler attached to a vehicle C, and the structural body 4 is a roof panel of the vehicle C. The first direction X in Fig. 1 corresponds to the width direction of the vehicle C, the second direction Y corresponds to the front-rear direction of the vehicle C, and the third direction Z corresponds to the up-down direction of the vehicle. The resin member 2 is not limited to the vehicle C, and may be a member attached to a framework or panel forming an aircraft, ship, building, or other structure.

[0010] The resin member 2 includes a first member 21 and a second member 31 facing the first member 21. The first member 21 is disposed on the structural body 4 side, and the second member 31 is disposed on the opposite side of the structural body 4 with the first member 21 in between. In this embodiment, the first member 21 is an inner panel of the spoiler. The second member 31 is an outer panel of the spoiler, and forms the design surface of the vehicle C.

[0011] The first member 21 is attached to the structure 4 by fasteners 10. In this embodiment, the fasteners 10 are bolts 10a and nuts 10d, but are not limited thereto. The fasteners 10 may be, for example, clips, screws, or other fasteners.

[0012] The first member 21 includes a first plate-shaped portion 22 and a protruding structure 23 that protrudes downward from the first plate-shaped portion 22 (in the opposite direction to the arrow Z in FIG. 1).

[0013] The first plate-shaped portion 22 has an external connecting portion 24 connected to the structural body 4. In this embodiment, the external connecting portion 24 connects the resin member 2 to the external structural body 4, and specifically serves as a base for holding the fastener 10. The first plate-shaped portion 22 also has an internal connecting portion 25 connected to the second member 31. In this embodiment, the internal connecting portion 25 is disposed apart from the external connecting portion 24 and joined to the second member 31 by thermal welding. However, joining is not limited to this, and may be achieved by screws, bolts and nuts, adhesive, double-sided tape, or other joining means. The protruding structure 23 has a tip surface 23a, a first vertical wall 23b connecting the first plate-shaped portion 22 to the tip surface 23a, and a second vertical wall 23c connected to the tip surface 23a and facing the first vertical wall 23b.

[0014] The protruding structure 23 forms a space 23d defined by the tip surface 23a, the first vertical wall 23b, and the second vertical wall 23c. The space 23d can accommodate electrical components such as brake lights of the vehicle C, an imaging device, or various sensors.

[0015] The second member 31 includes a second plate-shaped portion 32 and a folded-back portion 33 folded back from the second plate-shaped portion 32. The second plate-shaped portion 32 is in contact with the first plate-shaped portion 22 or faces the first plate-shaped portion 22 with a small gap therebetween. The folded-back portion 33 is hooked onto the second vertical wall 23c of the first member 21. This causes the second member 31 to be locked to the first member 21.

[0016] The first member 21 and the second member 31 may be made of a thermoplastic resin. The thermoplastic resin is, for example, polypropylene (PP). However, the thermoplastic resin is not limited to this, and may be selected from ABS resin, polyethylene (PE), polystyrene (PS), acrylic resin, polycarbonate (PC) resin, polyamide, polyethylene terephthalate (PET), and modified polyphenylene ether (modified PPE).

[0017] Fig. 2 is a bottom view of the resin member 2. Line BB in Fig. 2 corresponds to the cross section of Fig. 1. The resin member 2 extends in a first direction X and a second direction Y intersecting the first direction X.

[0018] The first member 21 has a first end X1 and a second end X2 opposite the first end X1 in the first direction X. The first member 21 has a first end Y1 and a second end Y2 opposite the first end Y1 in the second direction Y.

[0019] 2, in this embodiment, the external connecting portion 24 includes a first external connecting portion 24a, a second external connecting portion 24b, a third external connecting portion 24c, and a fourth external connecting portion 24d, all of which have the function of holding the fastener 10. The first external connecting portion 24a and the second external connecting portion 24b are disposed closer to the first end Y1 than the center between the first end Y1 and the second end Y2 in the second direction Y.

[0020] In this embodiment, the internal coupling portion 25 includes a first internal coupling portion 25a and a second internal coupling portion 25b, both of which have the function of coupling to the second plate-shaped portion 32 of the second member 31. The first internal coupling portion 25a and the second internal coupling portion 25b are disposed closer to the first end portion Y1 than the center between the first end portion Y1 and the second end portion Y2 in the second direction Y.

[0021] The first member 21 has weakened portions 26 around the internal connecting portions 25. In the present embodiment, the weakened portions 26 are provided in the first plate-shaped portion 22. In the present embodiment, the weakened portions 26 include a first weakened portion 26a, a second weakened portion 26b, a third weakened portion 26c, and a fourth weakened portion 26d. The first weakened portion 26a and the second weakened portion 26b are arranged around the first internal connecting portion 25a. The third weakened portion 26c and the fourth weakened portion 26d are arranged around the second internal connecting portion 25b. The weakened portions 26 are more likely to tolerate deformation than portions of the first member 21 other than the weakened portions 26 due to factors such as the structure, shape, or material.

[0022] The following describes the structure and function of the fragile portion 26. However, since the third fragile portion 26c and the fourth fragile portion 26d are the same as the first fragile portion 26a and the second fragile portion 26b, respectively, a description thereof will be omitted.

[0023] 3, in this embodiment, the first weak portion 26a and the second weak portion 26b are slits provided in the first member 21. In this embodiment, the length of the first weak portion 26a is L1, and the width of the first weak portion 26a is constant. The length and width of the second weak portion 26b are the same as the length and width of the first weak portion 26a. However, this is not limiting, and the length and width of the second weak portion 26b may be different from the length and width of the first weak portion 26a.

[0024] The length L1 of the first weak portion 26a may be longer than the distance L2 and the distance L3. The distance L2 is the distance between the first end Y1 and the first outer connecting portion 24a in the second direction Y. Here, the position of the first outer connecting portion 24a is the position of the fastener 10 held by the first outer connecting portion 24a. The distance L3 is the distance between the first end Y1 and the first inner connecting portion 25a in the second direction Y. Here, the position of the first inner connecting portion 25a is the center position of the first inner connecting portion 25a in the second direction Y. Such a relationship between the length L1, the distance L2, and the distance L3 makes the first weak portion 26a more easily deformable. The length L1 of the first weak portion 26a may be shorter than the distance L2 and the distance L3.

[0025] The first weak portion 26a is disposed between the first outer connecting portion 24a and the first inner connecting portion 25a in the first direction X. The second weak portion 26b is disposed at a position farther from the first outer connecting portion 24a than the first weak portion 26a in the first direction X. The first inner connecting portion 25a is provided in an inner connecting region 28 formed between the first weak portion 26a and the second weak portion 26b. The first inner connecting portion 25a is connected to a region 35 of the second member 31.

[0026] The first outer connection portion 24a is provided in an outer connection region 27, which is opposite the inner connection region 28 across the first weak portion 26a. The outer connection region 27 is connected to the structure 4, but is not connected to the second member 31.

[0027] The function of the fragile portion 26 will now be described. As shown in FIG. 1, the resin member 2 protrudes rearward from the vehicle C (see the protruding structure 23 in particular). With such a resin member 2, the rearward protruding portion may collide with an object moving upward, and may be subjected to an upward load F due to this collision. The resin member 2 moves or deforms upward when subjected to the load F. (a) and (b) of FIG. 4 correspond to the CC cross section of FIG. 2. (a) of FIG. 4 shows the resin member 2 without the fragile portion 26. (b) of FIG. 4 shows the resin member 2 with the fragile portion 26.

[0028] As shown in FIG. 4(a), when a load F is applied, the second member 31 moves upward. Following this, the internal connecting portion 25 of the first member 21 also attempts to move upward. Meanwhile, the first member 21 is fixed to the structure 4 by the fastener 10. Therefore, the external connecting portion 24 of the first member 21 does not displace even when the load F is applied. As a result, the internal connecting portion 25 of the first member 21 is pulled by the external connecting portion 24 and cannot move with the second member 31, so it peels off from the second member 31. If the internal connecting portion 25 peels off from the second member 31, the external connecting portion 24 is destroyed by the impact, etc., and the resin member 2 falls off from the structure 4. In contrast, as shown in FIG. 4(b), the fragile portion 26 is structured to allow deformation of the first member 21, which makes it easier for the internal connecting portion 25 to move with the second member 31. The fragile portion 26 prevents the internal coupling portion 25 from peeling off from the second member 31. This makes it possible to prevent the resin member 2 from being decomposed and from falling off from the structure 4.

[0029] 5, the fragile portion 26 may further include a narrow portion 28d provided between the second end Y2 and the first internal connecting portion 25a in the second direction Y. In the present embodiment, the narrow portion 28d is provided at the base portion 28a of the internal connecting region 28, although this is not limited thereto.

[0030] Specifically, the internal connection region 28 is defined by a first weak portion 26a and a second weak portion 26b. The internal connection region 28 has a base portion 28a connected to the first plate-shaped portion 22 and a tip portion 28b opposite the base portion 28a. The internal connection region 28 also includes a narrow portion 28d provided at the base portion 28a and a wide portion 28c provided at the tip portion 28b. The wide portion 28c has a width W1. The narrow portion 28d has a width W2 that is smaller than W1.

[0031] In this embodiment, the fragile portion 26 includes a first fragile portion 26a, a second fragile portion 26b, and a narrow portion 28d, and surrounds the first internal connecting portion 25a. Therefore, the fragile portion 26 makes the first member 21 more easily deformable and prevents the first internal connecting portion 25a from peeling off from the second member 31.

[0032] In this embodiment, the narrow portion 28d is easily deformed by warping around the axis Ax. The axis Ax is an axis along the longitudinal direction of the narrow portion 28d, which is an axis parallel to the first direction X in this embodiment. The narrow portion 28d is also easily deformed by twisting around the axis Ay. The axis Ay is an axis perpendicular to Ax, which is an axis parallel to the second direction Y in this embodiment. In this embodiment, the fragile portion 26 includes the narrow portion 28d, which enables complex deformation of the first member 21.

[0033] 6, the fragile portion 26 may further include a bellows portion 29 provided between the second end portion Y2 and the first internal connecting portion 25a in the second direction Y. In the present embodiment, the bellows portion 29 is provided at the base portion 28a of the internal connecting region 28, although this is not limited thereto.

[0034] In this embodiment, bellows portion 29 includes vertical wall 29a, horizontal wall 29b connected to vertical wall 29a, vertical wall 29c connected to horizontal wall 29b, and horizontal wall 29d connected to vertical wall 29c. Bellows portion 29 may have a structure in which these units are repeated multiple times. In the example of Fig. 6, bellows portion 29 includes two units.

[0035] In the present embodiment, the bellows portion 29 is provided over the entire range between the first weak portion 26a and the second weak portion 26b. This makes it easier for the first member 21 to deform. However, this is not limiting, and the bellows portion 29 may be provided only in a portion between the first weak portion 26a and the second weak portion 26b.

[0036] In the present embodiment, the fragile portion 26 includes a first fragile portion 26a, a second fragile portion 26b, and a bellows portion 29, and surrounds the first internal coupling portion 25a. Therefore, the fragile portion 26 makes the first member 21 more easily deformable and can prevent the first internal coupling portion 25a from peeling off from the second member 31.

[0037] In this embodiment, bellows portion 29 is easily deformed by warping around axis Ax. Axis Ax is an axis along the longitudinal direction of bellows portion 29, and in this embodiment, is an axis parallel to first direction X. In this embodiment, fragile portion 26 includes bellows portion 29, and therefore can allow more complex deformation of first member 21.

[0038] As described above, the resin member 2 includes a first member 21 and a second member 31 facing the first member 21. The first member 21 has an external connecting portion 24 for connecting the resin member 2 to the external structure 4, an internal connecting portion 25 that is spaced apart from the external connecting portion 24 and connects the first member 21 to the second member 31, and a fragile portion 26 provided around the internal connecting portion 25. Such a resin member 2 is unlikely to disintegrate or fall off from the structure even when subjected to an unintended load due to a collision with an object or the like.

[0039] The fragile portion 26 may be disposed between the outer connecting portion 24 and the inner connecting portion 25. This allows the fragile portion 26 to facilitate movement of the inner connecting portion 25 independently of the outer connecting portion 24, thereby preventing the inner connecting portion 25 from peeling off from the second member 31.

[0040] The first member 21 may have a first end Y1 and a second end Y2 opposite the first end Y1. The internal coupling portion 25 may be disposed closer to the first end Y1 than the center between the first end Y1 and the second end Y2. The fragile portion 26 may be disposed between the second end Y2 and the internal coupling portion 25. This makes it difficult for the fragile portion 26 to transmit the load received by the second end Y2 to the internal coupling portion 25, thereby preventing the internal coupling portion 25 from peeling off from the second member 31.

[0041] The weakened portion 26 may include a slit, which is highly effective in suppressing the transmission of load.

[0042] The fragile portion 26 may include two slits, and the internal connecting portion 25 may be disposed in an internal connecting region 28 sandwiched between the two slits. This allows the fragile portion 26 to facilitate independent movement of the internal connecting portion 25, thereby preventing the internal connecting portion 25 from peeling off from the second member 31.

[0043] Although the present disclosure has been described above with reference to the embodiment, the present disclosure is not limited to the above embodiment, and various modifications are possible without departing from the spirit of the invention. In particular, the multiple modifications described in this specification can be arbitrarily combined as necessary.

[0044] In the above embodiment, the fragile portion 26 includes the first fragile portion 26a and the second fragile portion 26b. However, this is not limiting, and the fragile portion 26 may include only the first fragile portion 26a.

[0045] In the above embodiment, the first weak portion 26a is a slit, but is not limited to this, and the first weak portion 26a may be a bellows portion, a long hole, a groove, or any other structure, shape, or material that is easily deformed. [Explanation of symbols]

[0046] 2: Resin member, 21: First member, 31: Second member, 24: External connecting portion, 25: Internal connecting portion, 26: Weak portion

Claims

1. A first member; a resin member including the first member and a second member facing the first member, The first member is an external connection portion for connecting the resin member to an external structure; an internal connecting portion spaced apart from the external connecting portion and connecting the first member and the second member; a weakened portion provided around the internal connection portion; having Resin parts.

2. The weakened portion is disposed between the outer connecting portion and the inner connecting portion. The resin member according to claim 1 .

3. The first member has a first end and a second end opposite the first end, the internal connection portion is disposed closer to the first end than a center between the first end and the second end, the weakened portion is disposed between the second end and the internal connection portion; The resin member according to claim 1 .

4. The weakened portion includes a slit. The resin member according to claim 1 .

5. the weakened portion includes two slits, The internal connection portion is disposed in an internal connection region sandwiched between the two slits. The resin member according to claim 4.

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