Structural construction

Abstract

The present invention provides a fastening structure that suppresses deformation of resin components and prevents them from detaching from the structure. [Solution] The fastening structure is a fastening structure for a resin member fastened to a structure by a fastening member, comprising the fastening member and the resin member, wherein the resin member is positioned facing the structure and has a first wall portion extending in a first direction and a second wall portion connected to the first wall portion and extending in a second direction intersecting the first direction, the first wall portion has a through hole facing the structure, and the fastening member has a shaft inserted into the through hole, a first flange connected to the shaft and positioned on the opposite side of the structure across the first wall portion and extending in a first direction, and an extension piece connected to the first flange and extending in a second direction and facing the second wall portion

Description

Technical Field

[0001] The present disclosure relates to a fastening structure for fastening a resin member to a structure by a fastening member.

Background Art

[0002] Patent Documents 1 and 2 disclose fastening structures for attaching a resin member (spoiler) to a vehicle body. Patent Document 1 discloses a fastening structure for fastening a resin member to a vehicle body by inserting and fastening a bolt from the vehicle body side to a nut held by the resin member. Patent Document 2 discloses a fastening structure for fastening a resin member to a vehicle body by inserting and fastening a bolt held by the resin member to a nut attached to the vehicle body side.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] Resin members such as spoilers may deform when subjected to an unintended load such as an object collision. Even in such a case, it is desirable that the resin member does not fall off from a structure such as a vehicle body. The present disclosure provides a fastening structure capable of suppressing deformation of the resin member and suppressing the resin member from falling off from the structure.

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 fastening member; and the resin member, wherein the resin member is positioned facing the structure and has a first wall portion extending in a first direction; and a second wall portion connected to the first wall portion and extending in a second direction intersecting the first direction, the first wall portion has a through hole facing the structure; and the fastening member has a shaft inserted into the through hole; a first flange connected to the shaft and positioned on the opposite side of the structure across the first wall portion and extending in a first direction; and an extension piece connected to the first flange and extending in a second direction and facing the second wall portion. [Effects of the Invention]

[0006] According to this disclosure, it is possible to provide a fastening structure that can suppress deformation of the resin member and prevent the resin member from falling off the structure. [Brief explanation of the drawing]

[0007] [Figure 1] A perspective view showing a vehicle equipped with a fastening structure. [Figure 2] A top view showing the rear of the vehicle. [Figure 3] A cross-sectional view showing section AA in Figure 2. [Figure 4] An exploded perspective view showing the fastening 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] As shown in Figure 1, in this embodiment, the resin member 2 is an exterior member attached to the vehicle C, and more specifically, it is a spoiler. The resin member 2 is attached, for example, to the rear of a wagon-type vehicle C. The structure 4 is, for example, a roof panel that forms the ceiling of the vehicle C to which the resin member 2 is attached. In Figure 1, the first direction Z corresponds to the vertical direction of the vehicle C, the second direction X corresponds to the front-rear direction of the vehicle C, and the third direction X corresponds to the width direction of the vehicle C. Note that the resin member 2 is not limited to a wagon-type vehicle C, but may also be a member attached to a sedan-type vehicle, an aircraft, a ship, a building, or other skeletal structure or panel.

[0010] Figure 2 is a top view showing the rear of vehicle C. As shown in Figure 2, the fastening structure 1 is a structure for fastening the resin member 2 to the structural body 4 using fastening members 10. In the fastening structure 1 of this embodiment, the resin member 2 is fastened to the structural body 4 at two points by two fastening members 10 that are spaced apart in the third direction X.

[0011] As shown in Figure 3, the structure 4 has a first plate portion 41 that extends along the second direction X and the third direction X, and a second plate portion 42 that is connected to the rear end of the first plate portion 41 (in the direction of the arrow X in Figure 3) and extends along the first direction Z and the third direction X. Both the first plate portion 41 and the second plate portion 42 in this embodiment are sheet metal members and form part of the design of the vehicle C (see Figure 1).

[0012] The structure 4 further has bolt holes 43 for receiving the fastening members 10. The bolt holes 43 are through holes located in the second plate portion 42 and penetrating in the second direction X.

[0013] The fastening structure 1 comprises a resin member 2 and a fastening member 10 held by the resin member 2.

[0014] 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. In this embodiment, the first resin member 20 is the inner panel of the spoiler, and the second resin member 30 is the outer panel of the spoiler.

[0015] The first resin member 20 has a first plate-like portion 21, a first wall portion 22 connected to the first plate-like portion 21, a second wall portion 23 connected to the first wall portion 22, and a rear wall portion 24 connected to the second wall portion 23.

[0016] The first plate-like portion 21 extends in the second direction X and the third direction X and faces the first plate portion 41 of the structure 4. The first plate-like portion 21 includes a front end (the opposite direction of the arrow X in FIG. 3) 21a and a rear end (the arrow X direction in FIG. 3) 21b in the second direction X. The first plate-like portion 21 of the present embodiment is partially or entirely adhered to the first plate portion 41 by a double-sided tape. Note that the adhesion means is not limited to the double-sided tape and may be by an adhesive or other joining means.

[0017] The first wall portion 22 is connected to the rear end 21b of the first plate-like portion 21 and extends in the first direction Z and the third direction X. The first wall portion 22 faces the second plate portion 42 of the structure 4. The first wall portion 22 includes an upper end (the arrow Z direction in FIG. 3) 22a on the first plate-like portion 21 side and a first wall end portion 22b which is the lower end (the opposite direction of the arrow Z in FIG. 3) on the side opposite to the upper end 22a in the first direction Z. The first wall portion 22 further includes a through hole 22c facing the structure 4. The through hole 22c penetrates the first wall portion 22 along the second direction X and faces the bolt hole 43 of the structure 4.

[0018] The second wall portion 23 is connected to the first wall end portion 22b of the first wall portion 22 and extends in the second direction X and the third direction X. The second wall portion 23 includes a second wall base end portion 23a which is the front end (the opposite direction of the arrow X in FIG. 3) on the first wall portion 22 side and a second wall tip portion 23b which is the rear end (the arrow X direction in FIG. 3) on the side opposite to the second wall base end portion 23a in the second direction X.

[0019] The rear wall portion 24 is connected to the second wall tip portion 23b of the second wall portion 23 and faces the first wall portion 22 in the second direction X. The rear wall portion 24 of the present embodiment slopes and expands with respect to the first direction Z. The rear wall portion 24 includes a front end (in the direction opposite to the arrow X in FIG. 3) 24a on the second wall portion 23 side and a rear end (in the direction of the arrow X in FIG. 3) 24b opposite to the front end 24a in the second direction X. The rear end 24b is arranged to be spaced apart from the second plate portion 42 of the structure 4 in the second direction X. Thereby, a part of the first resin member 20 and thus the resin member 2 protrudes from the structure 4.

[0020] The first wall portion 22, the second wall portion 23, and the rear wall portion 24 form an accommodation space 25 behind the structure 4 (in the direction of the arrow X in FIG. 3). The accommodation space 25 can accommodate, for example, electrical components such as a brake lamp, an imaging device, or various sensors of the vehicle C.

[0021] Note that the first plate-like portion 21, the first wall portion 22, the second wall portion 23, and the rear wall portion 24 may have portions that slope and expand with respect to the first direction Z, the second direction X, and the third direction X in accordance with the appearance of the vehicle C and the shape of the structure 4.

[0022] The second resin member 30 has a second plate-like portion 31, a first locking portion 32 that bends from the front end (in the direction opposite to the arrow X in FIG. 3) 3la of the second plate-like portion 31 toward the structure 4 side, and a second locking portion 33 that folds back from the rear end (in the direction of the arrow X in FIG. 3) 31b of the second plate-like portion 31.

[0023] The second plate-like portion 31 expands in the second direction X and the third direction X and forms a part of the design of the resin member 2. The second plate-like portion 31 faces the first plate-like portion 21 of the first resin member 20 with a gap and covers the accommodation space 25. Note that the second plate-like portion 31 may also have portions that slope and expand with respect to the first direction Z, the second direction X, and the third direction X in accordance with the appearance of the vehicle C (see FIG. 1) and the shape of the structure 4.

[0024] The first locking portion 32 is locked to the front end 21a of the first plate-shaped portion 21. The second locking portion 33 is locked to the rear end 24b of the rear wall portion 24. As a result, the second resin member 30 is locked to the first resin member 20, forming a spoiler having a shell structure.

[0025] The second resin member 30 may further have an internal connecting portion 34 connected to the first resin member 20. The internal connecting portion 34 is provided on the second plate-like portion 31 and joined to the first resin member 20. In this embodiment, the internal connecting portion 34 is joined to the first resin member 20 by heat welding. However, the joining is not limited to this and may be done by screws, bolts and nuts, adhesive, double-sided tape, or other joining means.

[0026] The first resin member 20 and the second resin member 30 may be formed from a thermoplastic resin. The thermoplastic resin is, for example, polypropylene (PP). However, other thermoplastic resins that can be selected include ASA resin (Acrylate Sthrene Acrylonitrile), ABS resin, polyethylene (PE), polypropylene (PP), polystyrene (PS), acrylic resin, polycarbonate (PC), polyamide, polyethylene terephthalate (PET), and modified polyphenylene ether (modified PPE).

[0027] Next, the configuration of the fastening member 10 of this disclosure will be described. The fastening member 10 of this embodiment comprises a nut 101 held by the resin member 2, a bolt 102 attached to the nut 101 from the structure 4 side, and a washer 103 placed between the nut 101 and the structure 4. The bolt 102 is inserted into a bolt hole 43 of the structure 4 and fastened with the nut 101, which is located on the opposite side of the first resin member 20 across the structure 4. In this way, the resin member 2 is fastened to the structure 4 by the fastening member 10. The fastening member 10 is made of metal which has greater rigidity than the resin member 2. The material of the fastening member 10 may be, for example, iron, stainless steel, titanium, or other metal materials. In this embodiment, the nut 101 located on the resin member 2 side and the bolt 102 located on the structure 4 side are described as an example, but the fastening member 10 is not limited to this, and may consist of a bolt located on the resin member 2 side, a nut located on the structure 4 side, and a washer.

[0028] Figure 4 is an exploded perspective view showing the fastening member 10. In the state in which the fastening member 10 is attached to the resin member 2 (hereinafter referred to as the attached state), arrow a in Figure 4 corresponds to the first direction Z, arrow b corresponds to the second direction X, and arrow c corresponds to the third direction X.

[0029] As shown in Figure 4, the bolt 102 has a bolt top 17 and a shaft 11 connected to the bolt top 17. The shaft 11 has male threads on its outer surface.

[0030] The nut 101 includes a first flange 13, a second flange 15, a receiving shaft 12 connecting the first flange 13 and the second flange 15, and an extension piece 14 connected to the first flange 13.

[0031] The receiving shaft 12 includes a through hole 12a. A female thread corresponding to the male thread of the shaft portion 11 is formed on the inner surface of the through hole 12a. As a result, the receiving shaft 12 receives the shaft portion 11 and fastens the nut 101 and bolt 102.

[0032] The first flange 13 is plate-shaped and extends from the outer circumferential surface of the receiving shaft 12. In this embodiment, the first flange 13 extends in the first direction Z (corresponding to arrow a in Figure 4) and the third direction X (corresponding to arrow c in Figure 4). In the first direction Z, the first flange 13 includes a first end 13a and a second end (an example of a first flange end) 13b opposite to the first end 13a.

[0033] The extension piece 14 is connected to the second end 13b of the first flange 13 and is plate-shaped, extending in the second direction X (corresponding to arrow b in Figure 4) and the third direction X (corresponding to arrow c in Figure 4). The extension piece 14 in this embodiment is a sheet metal member integrated with the first flange 13 and is formed by bending at the second end 13b of the first flange 13. The extension piece 14 includes an extension piece base end 14a that connects to the second end 13b of the first flange 13 in the second direction X (corresponding to arrow b in Figure 4), and an extension piece tip end 14b on the opposite side of the extension piece base end 14a. The extension piece tip end 14b in this embodiment is formed in an arc shape, but is not limited to this; it may also be formed in a rounded corner shape with a rounded corner, or the corner may be chamfered (so-called C-processing).

[0034] The second flange 15 is plate-shaped and extends from the outer circumferential surface of the receiving shaft 12, and is positioned spaced apart from the first flange 13 in the second direction X (corresponding to arrow b in Figure 4). In this embodiment, the second flange 15 extends in the first direction Z (corresponding to arrow a in Figure 4) and the third direction X (corresponding to arrow c in Figure 4), and is parallel to the first flange 13. The distance d1 between the second flange 15 and the first flange 13 in the second direction X is equal to or slightly greater than the thickness of the first wall portion 22 of the first resin member 20 (see Figure 3). In the first direction Z (corresponding to arrow a in Figure 4), the second flange 15 includes a first end portion 15a and a second end portion (an example of a second flange end portion) 15b opposite to the first end portion 15a. In the second direction X (corresponding to arrow b in Figure 4), the first end portion 15a faces the first end portion 13a of the first flange 13. The second flange 15 may be formed to be longer than the first flange 13 in the first direction Z. That is, the second end 15b of the second flange 15 may be positioned further away from the receiving shaft 12 than the second end 13b of the first flange 13 in the first direction Z. In this embodiment, the second end 15b is spaced a distance d2 away from the second end 13b of the first flange 13 (the base end 14a of the extension piece 14) in the first direction Z. The second flange 15 may be formed to be the same length as the first flange 13 in the first direction Z, and the second end 15b may face the second end 13b of the first flange 13 and the base end 14a of the extension piece 14 in the second direction X. The second end portion 15b of this embodiment is formed in a straight line, but is not limited to this; it may also be formed in an arc shape, similar to the tip portion 14b of the extension piece 14, or it may be formed in a rounded corner shape with a rounded corner, or in a straight line.

[0035] The washer 103 is an annular sheet metal member having a hole 18. The shaft 11 of the bolt 102 is inserted into the hole 18 of the washer 103. The washer 103 may be movable along the central axis O relative to the shaft 11. In this embodiment, the hole 18 is a through hole having an inner diameter slightly larger than the outer diameter of the shaft 11.

[0036] Next, returning to Figure 3, the positional relationship between the fastening member 10 and the resin member 2 in the installed state will be explained. In this embodiment, the installed state is a state in which the structure 4 and the first resin member 20, and thus the resin member 2, are fastened together as a single unit by fastening the bolt 102, which is inserted from the structure 4 side, to the nut 101 attached to the first resin member 20. As shown in Figure 3, the nut 101 is attached to the first wall portion 22 of the first resin member 20. The bolt 102 is inserted from the second plate portion 42 of the structure 4.

[0037] The receiving shaft 12 of the nut 101 is positioned inside the through hole 22c of the first resin member 20. Furthermore, the bolt hole 43 of the structure 4, the through hole 12a of the nut 101, and the hole 18 of the washer 103 are aligned in the second direction X. This allows the space 44 on the structure 4 side and the housing space 25 to communicate. The shaft portion 11 of the bolt 102 is inserted into the bolt hole 43 from the structure 4 side via the hole 18 of the washer 103, and in the second direction X, it passes through the hole 18 of the washer 103, the bolt hole 43 of the structure 4, and the through hole 12a of the nut 101 and protrudes into the housing space 25. In this embodiment, in the installed state, the central axes of the hole 18 of the washer 103, the bolt hole 43 of the structure 4, the receiving shaft 12 (through hole 12a) of the nut 101, and the through hole 22c of the first resin member 20 generally coincide with the central axis O of the shaft portion 11.

[0038] The first flange 13 and the extension piece 14 are positioned inside the housing space 25. In this embodiment, the second end 13b of the first flange 13 (the base end 14a of the extension piece 14) abuts against the first wall end 22b of the first wall portion 22 (the base end 23a of the second wall portion 23) from the housing space 25 side.

[0039] The extension piece 14 is positioned opposite the second wall portion 23 in the first direction Z. Furthermore, the extension piece 14 is in partial or complete contact with the second wall portion 23. In this embodiment, the extension piece 14 is in surface contact with the second wall portion 23 over its entire length, from the base end 14a to the tip end 14b, in the second direction X. In this embodiment, the base end 14a of the extension piece 14 is positioned between the base end 23a and the tip end 23b of the second wall portion 23 in the second direction X. Similarly, the tip end 14b of the extension piece 14 is also positioned between the base end 23a and the tip end 23b of the second wall portion 23 in the second direction X. In other words, in the second direction X, the length d3 of the second wall portion 23 from the base end portion 23a to the tip end portion 23b of the second wall portion 23 is greater than the length d4 of the extension piece from the base end portion 14a to the tip end portion 14b of the extension piece.

[0040] The second flange 15 is positioned in the second direction X on the opposite side of the first flange 13, sandwiching the first wall portion 22 of the first resin member 20. That is, in the second direction X, the second flange 15 sandwiches the first wall portion 22 together with the first flange 13. Also, in the second direction X, the second flange 15 is sandwiched between the second plate portion 42 of the structure 4 and the first wall portion 22 of the first resin member 20. The second end portion 15b of the second flange 15 is positioned in the first direction Z below the first wall end portion 22b of the first wall portion 22 (the second wall base end portion 23a of the second wall portion 23) (in the opposite direction of arrow Z in Figure 5). In other words, in the first direction Z, the length d5 ​​from the central axis O of the shaft portion 11 of the second flange 15 to the second end portion 15b is greater than the length d6 from the through hole 22c of the first wall portion 22 to the first wall end portion 22b of the first wall portion 22 (the second wall base end portion 23a of the second wall portion 23). However, the second end portion 15b of the second flange 15 may be positioned to align with the first wall end portion 22b of the first wall portion 22 (the second wall base end portion 23a of the second wall portion 23) in the first direction Z. In other words, lengths d5 and d6 may be formed to be equal.

[0041] The washer 103 is sandwiched between the bolt top 17 of the bolt 102 and the second plate portion 42 of the structure 4 in the second direction X. By inserting the shaft portion 11 into the hole 18 of the washer 103, the washer 103 is mounted so as to be movable along the direction of the central axis O of the shaft portion 11. As a result, when the bolt 102 is tightened, the washer 103 moves toward the nut 101, and the nut 101 and bolt 102 can tighten the resin member 2 (see Figure 3).

[0042] Next, the effects of the fastening structure 1 of this embodiment will be explained using Figure 5. As shown in Figure 5(a), in this embodiment, the first resin member 20 and thus the resin member 2 are fastened to the structure 4 by the fastening member 10 by fastening a nut 101 attached to the through hole 22c of the first resin member 20 with a bolt 102 inserted from the side of the structure 4. The resin member 2 equipped with such a fastening structure 1 may be subjected to an unintended load P in a direction that causes it to be pulled away from the structure 4 due to an impact of an object or the like. The load P is, for example, an upward load that pushes up the resin member 2 from below (opposite direction of arrow Z) on the rear side (second direction X side) of the resin member 2.

[0043] Figure 5(b) shows a comparative example fastening structure 100. The nut 101 of the fastening structure 100 has a disc-shaped first flange, a disc-shaped second flange, and a receiving shaft that connects the first flange and the second flange. In the fastening structure 100, when the second wall portion 23 deforms to move upward, stress concentration occurs at the contact point p where the end of the nut 101 and the second wall portion 23 make point contact. As a result, the first wall portion 22, which connects to the second wall portion 23 starting from the contact point p, attempts to deform so as to move away from the structure 4 to the rear and upward (see the dashed line in Figure 5(b)). On the other hand, the fastening member 10 attempts to remain attached to the structure 4. As a result, the first wall portion 22 of the first resin member 20 may come out from between the first flange 13 and the second flange 15 of the nut 101, causing the first resin member 20 and consequently the resin member 2 to fall off the structure 4. In response to such forces, the fastening structure 1 of this disclosure prevents the first resin member 20, and consequently the resin member 2, from falling off the structure 4 by moving the starting point of the deformation of the first resin member 20 caused by the load P away from the vicinity of the mounting position of the fastening member 10.

[0044] Returning to Figure 5(a), specifically, the extension piece 14 connected to the first flange 13 of the fastening member 10 contacts the second wall portion 23 of the first resin member 20. As a result, when a load P is applied to the resin member 2, the extension piece 14 can hold down the second wall portion 23, which is trying to move upward (in the direction of arrow Z in Figure 5(a)), with its entire length. Furthermore, when a load P is applied, the portion of the second wall portion 23 that does not face the extension piece 14 will move upward (in the direction of arrow Z in Figure 5(a)) and deform, starting from the vicinity of the contact point with the extension piece tip 14b of the extension piece 14 (see the dashed line in Figure 5(a)). Therefore, when deformation occurs due to the load P, the first resin member 20 deforms starting from a position spaced away from the mounting position (through hole 22c) of the fastening member 10, preventing the first resin member 20 from coming off the fastening member 10. As a result, the fastening structure 1 can prevent the first resin member 20, and consequently the resin member 2, from falling off the structure 4.

[0045] Furthermore, by the extension piece 14 pressing down on the second wall portion 23 as it attempts to move upward (in the direction of arrow Z in Figure 5(a)), the fastening structure 1 can distribute the load P in the area where the second wall portion 23 and the extension piece 14 are in contact. As a result, the fastening structure 1 can suppress stress concentration caused by the load P concentrating on the second wall portion 23 and, consequently, on a part of the first resin member 20.

[0046] Furthermore, the tip portion 14b of the extension piece 14 is positioned between the base portion 23a and the tip portion 23b of the second wall portion 23 in the second direction X. As a result, the tip portion 14b of the extension piece is positioned at a distance from the tip portion 23b of the second wall portion 23, where the second wall portion 23 and the rear wall portion 24 connect and bend. Therefore, by separating the point contact point between the tip portion 14b of the extension piece and the second wall portion 23, where stress concentration is likely to occur, from the bent portion of the tip portion 23b of the second wall portion, the load applied to the second wall portion 23 can be distributed. As a result, the fastening structure 1 can prevent the second wall portion 23 and, consequently, the resin member 2 from failing due to stress concentration.

[0047] Furthermore, the first flange 13 and the second flange 15 of the fastening member 10 sandwich the first wall portion 22 of the first resin member 20 in the second direction X. As a result, the first flange 13 and the second flange 15 can suppress the movement of the first wall portion 22. Therefore, the rearward (direction of arrow X in Figure 5(a)) and upward (direction of arrow Z in Figure 5(a)) movement of the first wall portion 22 due to the load P is suppressed, and consequently the expansion of the through hole 22c is suppressed, preventing the resin member 2 from falling off the fastening member 10.

[0048] Furthermore, the second end 15b of the second flange 15 is positioned below the first wall end 22b of the first wall portion 22 in the first direction Z (opposite direction of arrow Z in Figure 5(a)). As a result, the second flange 15, together with the first flange 13, can sandwich the area below the through hole 22c of the first wall portion 22. As described above, when a load P is applied to the resin member 2, the first wall portion 22 of the first resin member 20 moves to rotate upward (in the direction of arrow Z in Figure 5(a)) around the vicinity of the through hole 22c, and the through hole 22c attempts to deform by being stretched and enlarged by the rotation of the first wall portion 22. In this case, in the example shown in Figure 5(b), the second end 15b of the second flange 15 may get caught inside the enlarged through hole 22c. In this embodiment, the first flange 13 and the second flange 15 can restrict the movement of the first wall portion 22 in the second direction Y by sandwiching the first wall portion 22. Furthermore, even if the through hole 22c expands due to deformation of the first wall portion 22, the second end portion 15b of the second flange 15 is positioned away from the through hole 22c, thereby preventing the second end portion 15b from entering the interior of the through hole 22c.

[0049] As described above, the fastening structure 1 can suppress deformation of the resin member 2 and prevent the resin member 2 from falling off the structure 4.

[0050] As described above, the fastening structure 1 according to this embodiment can achieve the following effects.

[0051] A fastening structure 1 for a resin member 2 fastened to a structure 4 by a fastening member 10, The fastening member 10 and the resin member 2 are provided, The aforementioned resin member 2 is A first wall portion 22 is positioned opposite the aforementioned structure 4 and extends in the first direction Z, A second wall portion 23 is connected to the first wall portion 22 and extends in a second direction X that intersects the first direction Z, It has, The first wall portion 22 has a through hole 22c facing the structure 4, The fastening member 10 is The shaft (receiving shaft) 12 inserted into the through hole 22c, A first flange 13 is connected to the shaft 12, positioned on the opposite side of the structure 4 across the first wall portion 22, and extends in the first direction Z. An extension piece 14 connected to the first flange 13 and extending in the second direction X, facing the second wall portion 23, It holds.

[0052] According to this fastening structure 1, the extension piece 14 connected to the first flange 13 of the fastening member 10 faces the second wall portion 23 of the first resin member 20. As a result, the first resin member 20 deforms starting from the area around the tip portion 14b of the extension piece, which is spaced apart from the through hole 22c into which the shaft 12 of the fastening member 10 is inserted. Consequently, the fastening structure 1 prevents the fastening member 10 from coming out of the first resin member 20 and prevents the first resin member 20, and thus the resin member 2, from falling off the structure 4. Furthermore, the extension piece 14 can hold down the second wall portion 23, which tries to move upward due to the load applied to the resin member 2, with its entire extension piece 14. Therefore, the fastening structure 1 can distribute the load in the area where the second wall portion 23 and the extension piece 14 face each other. As a result, the fastening structure 1 can suppress stress concentration in the second wall portion 23 and consequently in the first resin member 20, thereby preventing deformation and ultimately failure of the resin member 2.

[0053] The first flange 13 includes a first flange end (second end) 13b at the end facing the second wall portion 23, The extension piece 14 is connected to the first flange end 13b.

[0054] As a result, the extension piece 14 can transmit and distribute the load applied via the second wall portion 23 to the first flange 13. This prevents stress concentration in the second wall portion 23 and suppresses deformation of the first resin member 20 and, consequently, the resin member 2.

[0055] The extension piece 14 is in contact with the second wall portion 23.

[0056] As a result, the extension piece 14 can hold down the second wall portion 23, which is attempting to move upward due to the load applied to the resin member 2. In particular, as in this embodiment, when the extension piece 14 is in surface contact with the second wall portion 23, the entire extension piece 14 can hold down the second wall portion 23 by surface contact, which is extremely effective. Therefore, the fastening structure 1 can distribute the load P in the area where the second wall portion 23 and the extension piece 14 are in contact. As a result, the fastening structure 1 can suppress stress concentration caused by the load P concentrating on the second wall portion 23 and, consequently, on a part of the first resin member 20, thereby suppressing deformation of the resin member 2 and preventing it from falling off the structure 4.

[0057] The fastening member 10 is It is connected to the shaft 12, positioned on the opposite side of the first flange 13 across the first wall portion 22, and further has a second flange 15 extending in the first direction Z, The first wall portion 22 includes a first wall end portion 22b at the end on the side of the second wall portion 23 in the first direction Z, The second flange 15 includes a second flange end (second end) 15b at the end on the second wall portion 23 side in the first direction Z, The length d5 ​​of the second flange 15 from the shaft 12 to the end of the second flange 15b is greater than the length d6 of the first wall portion 22 from the through hole 22c to the end of the first wall portion 22b.

[0058] As a result, the first flange 13 and the second flange 15 can restrict the movement of the first wall portion 22 in the second direction Y by sandwiching the first wall portion 22. Furthermore, even if the through hole 22c expands due to deformation of the first wall portion 22, the second end portion 15b of the second flange 15 is positioned away from the through hole 22c, preventing the second end portion 15b from entering the interior of the through hole 22c.

[0059] The extension piece 14 includes an extension piece base end 14a connected to the first flange 13 and an extension piece tip 14b opposite to the extension piece base end 14a. The second wall portion 23 includes a second wall base portion 23a connected to the first wall portion 22 and a second wall tip portion 23b opposite to the second wall base portion 23a. The length d3 from the base end 23a of the second wall to the tip end 23b of the second wall is greater than the length d4 from the base end 14a of the extension piece to the tip end 14b of the extension piece.

[0060] As a result, the tip portion 14b of the extension piece is positioned at a distance from the tip portion 23b of the second wall where the second wall portion 23 and the rear wall portion 24 connect and bend. Therefore, by separating the point contact point between the tip portion 14b of the extension piece and the second wall portion 23, where stress concentration is likely to occur, from the bent portion of the tip portion 23b of the second wall, the load applied to the second wall portion 23 can be distributed. As a result, deformation of the second wall portion 23 and, consequently, the resin member 2 can be suppressed.

[0061] 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.

[0062] 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]

[0063] 1: Fastening structure 2: Resin component 20: First resin component 22:First wall part 22b: 1st wall end 22c: Through hole 23:Second wall part 23a: Base end of second wall 23b: 2nd wall tip 4: Structure 10: Fastening member 12: Receiving shaft (shaft portion) 13: First flange 13: First flange end 13b 14: Extension piece 14a: Extension piece base end 14b: Extension piece tip 15: Second flange 15b: Second flange end H: 1st direction L:Second direction

Claims

1. A fastening structure for resin members fastened to a structure by fastening members, The fastening member and the resin member are provided. The aforementioned resin member is A first wall portion is positioned opposite the aforementioned structure and extends in a first direction, A second wall portion connected to the first wall portion and extending in a second direction intersecting the first direction, It has, The first wall portion has a through hole facing the structure, The fastening member is The shaft inserted into the through hole, A first flange connected to the shaft, positioned on the opposite side of the structure across the first wall, and extending in the first direction, An extension piece connected to the first flange and extending in the second direction, facing the second wall, A fastening structure having the following characteristics.

2. The first flange includes the first flange end at the end on the second wall side, The fastening structure according to claim 1, wherein the extension piece is connected to the first flange end.

3. The extension piece is in contact with the second wall portion. The fastening structure according to claim 1 or 2.

4. The fastening member is It is connected to the shaft and is positioned on the opposite side of the first flange across the first wall, and further has a second flange extending in the first direction, The first wall portion includes the first wall end at the end on the second wall portion side in the first direction, The second flange includes a second flange end at the end on the second wall side in the first direction. The length of the second flange from the shaft to the end of the second flange is greater than the length of the first wall from the through hole to the end of the first wall. The fastening structure according to claim 1.

5. The extension piece includes an extension piece base end connected to the first flange and an extension piece tip opposite to the extension piece base end, The second wall portion includes a second wall base portion connected to the first wall portion and a second wall tip portion opposite to the second wall base portion, The length from the base end of the second wall to the tip end of the second wall is greater than the length from the base end of the extension piece to the tip end of the extension piece. The fastening structure according to claim 1.

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