Structural construction

Abstract

The present invention provides a fastening structure capable of suppressing deformation of a resin member fastened to a structure via a fastening member. [Solution] The fastening structure 1 is a fastening structure for a resin member 2 fastened to a structure 4 by a fastening member 10, and comprises a resin member 2 and a sheet metal member 8 positioned on the opposite side of the resin member 2 from the structure 4, the resin member 2 having a fastened portion T1 fastened to the structure 4 by the fastening member 10 and a contact portion T2 that contacts the structure 4 at a different position from the fastened portion T1, and the sheet metal member 8 having a first portion M1 fastened to the structure 4 together with the fastened portion T1 by the fastening member 10 and a second portion M2 connected to the first portion M1 and in contact with the contact portion T2.

Description

Technical Field

[0001] This disclosure relates to a fastening structure.

Background Art

[0002] Patent Document 1 discloses a fastening member for fastening a resin member to a structure. Patent Document 2 discloses a fastening structure of a resin member fastened to a counterpart member via a fastening member. Patent Document 3 discloses a fastening structure in which a fastened member is fastened to a spoiler body by a screw member.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] A resin member such as a spoiler is fastened to a structure such as a vehicle by a fastening member. Such a resin member may be deformed by an unintended load such as a collision of an object. When the deformation of the resin member reaches the portion (fastened portion) fastened by the fastening member of the resin member, the resin member may fall off from the structure due to the deformation or breakage of the fastened portion. This disclosure provides a fastening structure capable of suppressing the deformation of a resin member fastened to a structure via a fastening member.

Means for Solving the Problems

[0005] A fastening structure according to one aspect of the present disclosure is a fastening structure for a resin member fastened to a structure by a fastening member, comprising: the resin member and a sheet metal member disposed on the opposite side of the resin member from the structure, wherein the resin member has a fastened portion fastened to the structure by the fastening member and a contact portion that contacts the structure at a position different from the fastened portion, and the sheet metal member has a first portion fastened to the structure together with the fastened portion by the fastening member and a second portion connected to the first portion and in contact with the contact portion. [Effects of the Invention]

[0006] According to this disclosure, it is possible to provide a fastening structure that can suppress the deformation of a resin member fastened to a structure via a fastening member. [Brief explanation of the drawing]

[0007] [Figure 1] A cross-sectional view showing the fastening structure. [Figure 2] A top view showing the resin component. [Figure 3] A perspective view showing a sheet metal component. [Figure 4] A perspective view showing the positional relationship between sheet metal and resin components. [Figure 5] An explanatory diagram illustrating the effects of this disclosure. [Modes for carrying out the invention]

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

[0009] Figure 1 shows the fastening structure 1 of this embodiment. The fastening structure 1 comprises a resin member 2 attached to a structure 4 and a sheet metal member 8 positioned on the opposite side of the resin member 2 from the structure 4. The resin member 2 is fastened to the structure 4 by a fastening member 10. As shown in Figure 1, in this embodiment, the resin member 2 is a spoiler attached to the rear of a vehicle C, and the structure 4 is a body panel that forms the trunk of the vehicle C. In Figure 1, the first direction X corresponds to the vehicle 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 C. The resin member 2 is not limited to a vehicle C, but may also be a member attached to a skeletal structure or panel forming an aircraft, ship, building, or other structure.

[0010] The resin member 2 includes a first resin member 20 positioned on the structure 4 side and a second resin member 30 positioned opposite the first resin member 20. Together, the first resin member 20 and the second resin member 30 form a resin member 2 (spoiler) having a shell structure. In this embodiment, the first resin member 20 is the inner panel of the spoiler. The second resin member 30 is the outer panel of the spoiler and forms the design surface of the vehicle C.

[0011] Figure 2 is a top view of the resin member 2, and the second resin member 30 is omitted to show the internal structure of the resin member 2. Figure 1 corresponds to the AA cross-section in Figure 2. As shown in Figure 2, a plurality of sheet metal members 8 are attached to the first resin member 20 and fastened to the structure 4 by a plurality of fastening members 10. In this embodiment, the sheet metal members 8 include sheet metal members 8a and 8b that are spaced apart in the first direction X and extend in the second direction Y. The fastening members 10 also include fastening members 10a and 10b. In the following, the configuration of the first resin member 20, sheet metal members 8 and fastening members 10 will be described using the sheet metal members 8a and fastening members 10a located in the area corresponding to the AA cross-section in Figure 2 as an example.

[0012] Returning to Figure 1, the first resin member 20 comprises a plate-shaped first general portion 21 extending in the first direction X and the second direction Y, and a first folded portion 23 provided at the rear end (direction of arrow Y) of the first general portion 21. In this embodiment, the first folded portion 23 extends by folding downward (opposite direction of arrow Z) and forward (opposite direction of arrow Y), but is not limited to this, and may extend upward (direction of arrow Z) or backward (direction of arrow Y).

[0013] The second resin member 30 comprises a second general portion 31 that faces the first general portion 21 and extends in the first direction X and the second direction Y, and a second folded portion 33 provided at the rear end of the second general portion 31 (in the direction of arrow Y in Figure 1). The second general portion 31 faces the first general portion 21 of the first resin member 20 with a gap between them, partially in contact. As a result, a space S is formed between the first general portion 21 and the second general portion 31. The second folded portion 33 is folded downward (in the opposite direction of arrow Z in Figure 1) and forward (in the opposite direction of arrow Y in Figure 1), and faces the first folded portion 23 of the first resin member 20. The second folded portion 33 only needs to face the first folded portion 23, and may extend upward (in the direction of arrow Z in Figure 1) or backward (in the direction of arrow Y in Figure 1). The second folded portion 33 is joined to the first folded portion 23 by double-sided tape. However, the joining method is not limited to this; it may also be done by screws, bolts and nuts, heat welding, adhesives (hot melt), or other joining means.

[0014] The first resin member 20 and the second resin member 30 may be formed from a thermoplastic resin. Examples of thermoplastic resins include ABS resin, polypropylene (PP), polyethylene (PE), ASA resin (Acrylate Sthrene Acrylonitrile), polystyrene (PS), acrylic resin, polycarbonate (PC), polyamide, polyethylene terephthalate (PET), and modified polyphenylene ether (modified PPE).

[0015] The fastening member 10 is a metal bolt 11 and a metal nut 12 in this embodiment, but is not limited thereto, and may be, for example, a clip, a screw, or other fasteners. The bolt 11 has a shaft 11a extending along the third direction Z, a first flange 11b extending from the shaft 11a in the first direction X and the second direction Y, and a second flange 11c extending from the shaft 11a in the first direction X and the second direction Y and spaced apart from the first flange 11b.

[0016] The resin member 2 has a fastened portion T1 fastened to the structure 4 by the fastening member 10 and a contact portion T2 contacting the structure 4 at a position different from the fastened portion T1. The fastened portion T1 and the contact portion T2 are arranged to be spaced apart from each other. In this embodiment, the direction connecting the fastened portion T1 and the contact portion T2 generally coincides with the second direction Y, but is not limited thereto and may be offset in the first direction X or the third direction Z.

[0017] The fastened portion T1 is a portion of the resin member 2 to which the fastening member 10 is fastened. In this embodiment, the fastened portion T1 is provided on the first resin member 20, and more specifically, on the first general portion 21. In this embodiment, the fastened portion T1 is a portion overlapping the first flange 11b of the fastening member 10. The fastened portion T1 has a first through hole 25 for receiving the fastening member 10.

[0018] The contact portion T2 is a portion of the resin member 2 that contacts the structure 4. In this embodiment, the contact portion T2 is provided on the first resin member 20, and more specifically, on the first general portion 21.

[0019] The contact portion T2 may or may not be adhered to the structure 4. In this embodiment, the contact portion T2 includes a double-sided tape 24 attached to the surface on the side of the structure 4, and is adhered to the structure 4 by this double-sided tape 24. Not limited thereto, the contact portion T2 may be adhered by an adhesive. By adhering the contact portion T2 to the structure 4, the resin member 2 is more firmly fixed to the structure 4.

[0020] The resin member 2 further has a first concavo-convex structure 27 extending in a direction (the first direction X in this embodiment) intersecting the direction connecting the fastened portion T1 and the contact portion T2. The first concavo-convex structure 27 is disposed between the fastened portion T1 and the contact portion T2. The first concavo-convex structure 27 of this embodiment is a bead provided on the first general portion 21 and protruding in the third direction Z.

[0021] The first concavo-convex structure 27 includes a first top surface portion 27a spaced apart from the first general portion 21 in the third direction Z and extending in the first direction X and the second direction Y, a first front wall portion 27b connecting the first top surface portion 27a and the first general portion 21, and a first rear wall portion 27c facing the first front wall portion 27b and connecting the first top surface portion 27a and the first general portion 21. The first concavo-convex structure 27 of this embodiment is one bead with the first top surface portion 27a, the first front wall portion 27b, and the first rear wall portion 27c as one unit, but is not limited thereto. The first concavo-convex structure 27 may be a plurality of beads repeating such a unit.

[0022] The first concavo-convex structure 27 may have a rib 27d provided on the first top surface portion 27a and connecting the first front wall portion 27b and the first rear wall portion 27c. By adjusting the thickness of the rib 27d in the first direction X, the height of the rib 27d in the third direction Z, the pitch of the arrangement of the rib 27d in the first direction X, the number of the rib 27d, the angle of the rib 27d with respect to the second direction Y, etc., the ease of bending of the first concavo-convex structure 27 can be adjusted. The rib 27d of this embodiment is a rib extending in the first direction X, but the rib 27d may be inclined with respect to the first direction X and the second direction Y.

[0023] The sheet metal member 8 is placed in the space S between the first resin member 20 and the second resin member 30 (i.e., inside the spoiler) and is laminated on the first resin member 20. In this embodiment, the lamination direction of the structure 4, the first resin member 20 and the sheet metal member 8 generally coincides with the third direction Z, but is not limited to this, and the lamination direction may be shifted in the first direction X or the third direction Z depending on the shape and size of the structure 4 and the resin member 2. The first general portion 21 of the first resin member 20 has a first surface 21a facing the second resin member 30. The sheet metal member 8 in this embodiment is placed on the first surface 21a.

[0024] Figure 3 is a perspective view showing a sheet metal member 8. As shown in Figure 3, the sheet metal member 8 has a base portion 81 that extends in a first direction X and a second direction Y, and a flange portion 83 that extends from the periphery of the base portion 81. The flange portion 83 protrudes in a third direction Z from both peripheries of the base portion 81 in the first direction X and from the front end (opposite direction of arrow Y) in the second direction Y. The end of the flange portion 83 opposite to the base portion 81 is spaced apart from the base portion 81 in the third direction Z. The flange portion 83 in this embodiment includes a first flange portion 83a that protrudes in the third direction Z from a first periphery in the first direction X, a second flange portion 83b that protrudes in the third direction Z from a second periphery on the opposite side in the first direction X, and a third flange portion 83c that protrudes in the third direction Z from the front end in the second direction Y.

[0025] Returning to Figure 1, the sheet metal member 8 has a first portion M1 that is fastened to the structure 4 together with the resin member 2, and a second portion M2 that is connected to the first portion M1 and positioned at a different location from the first portion M1. The first portion M1 and the second portion M2 are spaced apart from each other. In this embodiment, the direction connecting the first portion M1 and the second portion M2 is roughly the same as the fastened portion T1 and contact portion T2 of the first resin member 20, and is not limited to this, but may be shifted to the first direction X or the third direction Z.

[0026] The first portion M1 is the part of the sheet metal member 8 that is fastened to the fastening member 10. In this embodiment, the first portion M1 is provided on the base portion 81. The first portion M1 is the part that overlaps with the fastened portion T1 of the first resin member 20. The first portion M1 has a second through hole 80 that receives the fastening member 10. The second through hole 80 communicates with the first through hole 25 in the stacking direction (third direction Z in this embodiment) of the structure 4, the first resin member 20, and the sheet metal member 8. In this embodiment, the bolt 11 of the fastening member 10 is inserted into the first through hole 25 of the first resin member 20 and the second through hole 80 of the sheet metal member 8, and further inserted into a bolt hole 40 provided in the structure 4. The bolt 11 protrudes through the bolt hole 40 to the opposite side of the space S (towards the structure 4) with the first resin member 20 in between. The nut 12 tightens the bolt 11 from the opposite side of the first resin member 20 with the structure 4 in between. As a result, the first resin member 20, and by extension the resin member 2, is fastened to the structure 4 together with the sheet metal member 8 by the fastening member 10.

[0027] As shown in Figure 3, in the first portion M1, the base portion 81 continuously surrounds the second through-hole 80. This improves the rigidity of the first portion M1. However, the design is not limited to this; the second through-hole 80 may also be a slit that extends to the end of the base portion 81.

[0028] The second portion M2 is the part of the sheet metal member 8 that contacts the contact portion T2 of the first resin member 20. In this embodiment, the second portion M2 is provided on the base portion 81 and overlaps with the contact portion T2 of the first resin member 20 in the third direction Z.

[0029] The sheet metal member 8 further has a second uneven structure 87 extending in a direction intersecting the direction connecting the first portion M1 and the second portion M2 (first direction X in this embodiment). The second uneven structure 87 is positioned between the first portion M1 and the second portion M2 and overlaps with the first uneven structure 27 of the first resin member 20 in the third direction Z. In this embodiment, the second uneven structure 87 is a bead provided on the base portion 81 and protruding in the third direction Z.

[0030] The second uneven structure 87 includes a second top surface portion 87a spaced apart from the base portion 81 in the third direction Z and extending in the first direction X and the second direction Y, a second front wall portion 87b connecting the second top surface portion 87a and the base portion 81, and a second rear wall portion 87c facing the second front wall portion 87b and connecting the second top surface portion 87a and the base portion 81. In this embodiment, the second uneven structure 87 is a single bead with the second top surface portion 87a, the second front wall portion 87b, and the second rear wall portion 87c as a single unit, but it is not limited to this, and the second uneven structure 87 may be any shape that overlaps the first uneven structure 27, and may be a plurality of beads that repeat such a single unit.

[0031] Figure 4 is an enlarged perspective view of portion B in Figure 2. As shown in Figure 4, the first uneven structure 27 is longer than the second uneven structure 87 and thus the sheet metal member 8 in the first direction X. In this embodiment, the ends of the first uneven structure 27 and the ends of the sheet metal member 8 are spaced apart in the first direction X, and the second uneven structure 87 covers a portion of the first uneven structure 27, including the central part in the first direction X.

[0032] Next, the function of the sheet metal member 8 will be explained using Figure 5. As shown in Figures 5(a) and 5(b), in the fastening structure 1 of this embodiment, the resin member 2 is fastened to the structure 4 via the fastening member 10. Such a fastening structure 1 may receive an unintended load P in a direction that causes the rear end of the resin member 2 to be pulled away from the structure 4 due to an object colliding with the resin member 2. While the resin member 2 tries to move in accordance with the applied load P, the fastening member 10 is fixed to the structure 4.

[0033] As shown in Figure 5(b), in the fastening structure 100 without the sheet metal member 8, the first resin member 20 of the resin member 2 deforms together with the second resin member 30 by bending in the third direction Z due to the load P (see arrow F3). At this time, since the fastened portion T1 is fixed to the structure 4 by the fastening member 10, it receives a reaction force F1 from the fastening member 10 in a direction that suppresses deformation with respect to the load P (opposite direction to the third direction Z). This deformation of the first resin member 20 deforms or damages the fastened portion T1 of the first resin member 20, and in some cases causes the resin member 2 to detach from the structure 4.

[0034] In contrast, as shown in Figure 5(a), in the fastening structure 1 of this embodiment, the sheet metal member 8 is laminated on the first resin member 20 in the third direction Z. As described above, the sheet metal member 8 has a first portion M1 that is fastened to the structure 4 together with the fastened portion T1 by the fastening member 10, and a second portion M2 that is connected to the first portion M1 and contacts the contact portion T2. ​​The first portion M1 presses the fastened portion T1 toward the structure 4 by the fastening member 10. The second portion M2 contacts the contact portion T2 from the side opposite to the structure 4 and presses the contact portion T2 toward the structure 4 (see arrow F2), suppressing the movement and deformation of the first resin member 20 in the third direction Z due to the load P. This prevents deformation or damage to the fastened portion T1 and prevents the resin member 2 from falling off the structure 4.

[0035] Furthermore, the sheet metal member 8 has a flange portion 83 that protrudes from the base portion 81 in a third direction Z. As a result, the flange portion 83 can reinforce the base portion 81 and improve the rigidity of the sheet metal member 8, thereby further suppressing the movement and deformation of the first resin member 20 in the third direction Z. Moreover, the end of the flange portion 83 opposite to the base portion 81 is spaced apart from the first resin member 20 in the third direction Z. As a result, the end of the sheet metal member 8 and the first resin member 20 can be kept in non-contact, preventing the load transmitted from the first resin member 20 to the sheet metal member 8 from returning to the first resin member 20 from the end of the sheet metal member 8, thereby preventing stress concentration in the first resin member 20.

[0036] Furthermore, the first resin member 20 is provided with a first uneven structure 27 extending in the first direction X. This improves the rigidity of the first resin member 20 in the second direction Y, which intersects with the first direction X. Moreover, the first uneven structure 27 is longer than the second uneven structure 87 in the first direction X, and the second uneven structure 87 covers a portion of the first uneven structure 27. As a result, the end of the first uneven structure 27, which is a bending portion where stress concentration may occur in the first direction X, and the end of the sheet metal member 8 can be spaced apart, thereby reducing stress concentration in the first resin member 20. As a result, deformation of the first resin member 20 and consequently the resin member 2 can be suppressed.

[0037] As described above, the resin member 2 according to this embodiment can achieve the following effects.

[0038] The fastening structure 1 is a fastening structure for a resin member 2 fastened to a structure 4 by a fastening member 10, and comprises a resin member 2 and a sheet metal member 8 positioned on the opposite side of the resin member 2 from the structure 4. The resin member 2 has a fastened portion T1 that is fastened to the structure 4 by the fastening member 10 and a contact portion T2 that contacts the structure 4 at a different position from the fastened portion T1. The sheet metal member 8 has a first portion M1 that is fastened to the structure 4 together with the fastened portion T1 by the fastening member 10 and a second portion M2 that is connected to the first portion M1 and contacts the contact portion T2.

[0039] In this fastening structure 1, a sheet metal member 8 is laminated onto a first resin member 20. The sheet metal member 8 has a first portion M1 that is fastened to the structure 4 together with the fastened portion T1 by a fastening member 10, and a second portion M2 that is connected to the first portion M1 and contacts the contact portion T2. ​​The first portion M1 presses the fastened portion T1 toward the structure 4 by the fastening member 10. The second portion M2 contacts the contact portion T2 from the side opposite to the structure 4 and presses the contact portion T2 toward the structure 4 (see arrow F2 in Figure 5(a)), suppressing the movement and deformation of the first resin member 20 in the third direction Z due to the load P. This prevents deformation or damage to the fastened portion T1 and prevents the resin member 2 from falling off the structure 4.

[0040] Furthermore, the contact portion T2 may be bonded to the structure 4. This allows the contact portion T2 to be fixed to the structure 4, and the resin member 2 is more firmly fixed to the structure 4.

[0041] Furthermore, the resin member 2 may have a first uneven structure 27 extending in a direction (first direction X) intersecting the direction (second direction Y) connecting the fastened portion T1 and the contact portion T2, and the sheet metal member 8 may have a second uneven structure 87 covering a part of the first uneven structure 27.

[0042] As a result, the first uneven structure 27 can improve the rigidity of the first resin member 20 in the second direction Y. Furthermore, the fastening structure 1 can be positioned so that the end of the first uneven structure 27, which is a bent portion where stress concentration may occur in the first direction X, is spaced apart from the end of the sheet metal member 8, thereby reducing stress concentration in the first resin member 20 and consequently in the resin member 2.

[0043] Furthermore, the sheet metal member 8 may have a base portion 81 that runs along the resin member 2, and a flange portion 83 that protrudes from the periphery of the base portion 81 toward the opposite side of the resin member 2 in a direction (first direction X) that intersects with the direction (second direction Y) connecting the fastened portion T1 and the contact portion T2.

[0044] This improves the rigidity of the sheet metal member 8, and further suppresses the movement and deformation of the first resin member 20 in the third direction Z. In addition, the fastening structure 1 can prevent contact between the end of the sheet metal member 8 and the first resin member 20, thereby preventing the load transmitted from the first resin member 20 to the sheet metal member 8 from returning to the first resin member 20 from the end of the sheet metal member 8, and preventing stress concentration in the first resin member 20.

[0045] Furthermore, the fastened portion T1 has a first through-hole 25 for receiving the fastening member 10, and the first portion M1 has a second through-hole 80 that receives the fastening member 10 and is surrounded by it, and the second through-hole 80 may be in communication with the first through-hole 25 in the lamination direction (third direction Z) of the resin member 2 and the sheet metal member 8.

[0046] As a result, the sheet metal member 8 can continuously surround the second through-hole 80, thereby improving the rigidity around the second through-hole 80.

[0047] Although embodiments of the present disclosure have been described above, the present disclosure is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention. In particular, the various modifications described herein can be combined as needed.

[0048] In the above embodiment, a spoiler is given as an example of a resin component. The technology of this disclosure is not limited to this and can be applied to any resin component that requires high rigidity in terms of dimensions or shape. [Explanation of symbols]

[0049] 1: Fastening structure 2: Resin component 4: Structure 8: Sheet metal components 10: Fastening member 25: First through hole 27: First uneven structure 80: Second through hole 81: Base 83: Flange section 87:Second uneven structure T1: Part to be fastened T2: Contact part M1: 1st part M2: 2nd part X: 1st direction Y: Second direction Z: 3rd direction

Claims

1. A fastening structure for resin members fastened to a structure by fastening members, The resin member and, A sheet metal member is disposed on the opposite side of the structure in the resin member, Equipped with, The aforementioned resin member is The fastened portion is fastened to the structure by the fastening member, A contact portion that contacts the structure at a position different from the fastened portion, It has, The aforementioned sheet metal member is A first portion that is fastened to the structure by the fastening member together with the fastened portion, A second part connected to the first part and in contact with the contact portion, Having, Fastening structure.

2. The contact portion is bonded to the structure. The fastening structure according to claim 1.

3. The resin member has a first uneven structure that extends in a direction intersecting the direction connecting the fastened portion and the contact portion. The sheet metal member has a second uneven structure that covers a part of the first uneven structure. The fastening structure according to claim 1.

4. The sheet metal member comprises a base portion along the resin member, and a flange portion projecting from the periphery of the base portion toward the opposite side of the resin member in a direction intersecting the direction connecting the fastened portion and the contact portion. Having, The fastening structure according to claim 1.

5. The fastened portion has a first through hole for receiving the fastening member, The first portion has a second through-hole that receives the fastening member and is surrounded by it, The second through-hole communicates with the first through-hole in the lamination direction of the resin member and the sheet metal member. The fastening structure according to claim 1.

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