Fastening structure

Abstract

To provide a new fastening structure which can inhibit deformation of a resin member holding a fastening member.SOLUTION: A fastening structure fastens a resin member to a structure by a fastening member. The fastening structure includes: a pedestal which is provided on a surface of the resin member and has a first pedestal surface which intersects with a fastening direction of the fastening member and contacts with the fastening member; and a reinforcement member having a first reinforcement surface which covers at least a part of a surface of the first pedestal surface and is provided with an insertion hole through which the fastening member is inserted.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to fastening structures. [Background technology]

[0002] Patent Document 1 discloses a fastening structure for fastening a spoiler, which is a resin member, to a structure. This fastening structure includes a base provided on the resin member and a fastening member that is fastened to the structure while being held by the base. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 6-59027 Summary of the Invention [Problem to be solved by the invention]

[0004] In such a fastening structure, when the resin member is subjected to a load, it is preferable that deformation of the base be suppressed and that the base and therefore the resin member be prevented from falling off.

[0005] An object of the present invention is to provide a novel fastening structure that can suppress deformation of a resin member that holds a fastening member.

[0006] A fastening structure according to one embodiment of the present disclosure is a fastening structure for fastening a resin member to a structure using a fastening member, and includes: a base provided on the surface of the resin member, having a first base surface that intersects the fastening direction of the fastening member and contacts the fastening member; and a reinforcing member that covers at least a portion of the surface of the first base surface and has a first reinforcing surface that is provided with an insertion hole for inserting the fastening member. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a novel fastening structure that can suppress deformation of a resin member that holds a fastening member. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 5 is a cross-sectional view showing the AA section of FIG. 4. [Figure 6] FIG. 4 is a perspective view of the fastening structure, in which the reinforcing member is shown by a dashed line. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings.

[0010] FIG. 1 is a cross-sectional view showing a fastening structure 1 of this embodiment. As shown in FIG. 1, the fastening structure 1 fastens a resin member 2 to a structural body 4 with a fastening member 10. The fastening structure 1 of this embodiment is a fastening structure for attaching a spoiler 20, which is an aerodynamic member, to a vehicle C. The resin member 2 of this embodiment is one component that constitutes the spoiler 20. The structural body 4 of this embodiment is a roof panel of the vehicle C.

[0011] However, the fastening structure 1 may also be a fastening structure for attaching exterior or interior members to a frame structure or panel that forms an aircraft, ship, building, or the like.

[0012] The spoiler 20 includes a resin member 2 and an exterior member 21 facing the resin member 2. Specifically, the resin member 2 is an inner panel of the spoiler 20, and the exterior member 21 is an outer panel of the spoiler 20. The resin member 2 is disposed on the structural body 4 side, and the exterior member 21 is disposed on the opposite side of the structural body 4 with the resin member 2 in between. The surface of the exterior member 21 opposite to the resin member 2 forms the design surface of the vehicle C.

[0013] The resin member 2 and the exterior member 21 are 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).

[0014] 2 is a plan view of the resin member 2. Line BB in FIG. 2 corresponds to the cross section in FIG. 1. The resin member 2 is plate-shaped and extends in a first direction X and a second direction Y intersecting the first direction X. In this embodiment, the first direction X coincides with the vehicle width direction W of the vehicle C in a state where the resin member 2 is fastened to the structural body 4 via the fastening members 10 (hereinafter referred to as the fastened state). Furthermore, the second direction Y coincides with the front-rear direction S of the vehicle C in the fastened state.

[0015] The resin member 2 has a first end Y1 and a second end Y2 opposite to the first end Y1 in the second direction Y. In this embodiment, in the fastened state, the first end Y1 is located rearward (in the direction of arrow S in FIGS. 1 and 2) of the vehicle C (see FIG. 1) relative to the second end Y2. The second end Y2 is located forward of the vehicle C (in the direction opposite to arrow S in FIGS. 1 and 2) relative to the first end Y1.

[0016] The resin member 2 further includes a plate-like portion 22, a protruding structure 23 that protrudes from the plate-like portion 22, and a fixing portion 24 that fixes the resin member 2 to the exterior member 21.

[0017] The plate-like portion 22 includes a front surface 22a facing the structure 4 and a back surface 22b opposite to the front surface 22a.

[0018] The resin member 2 has a first end X1 and a second end Y2 opposite the first end X1 in the first direction X. The protruding structure 23 extends in the first direction X. In this embodiment, the protruding structure 23 extends in the first direction X from near the first end X1 to near the second end X2 of the resin member 2.

[0019] 1, the protruding structure 23 includes a first tip surface 23a that is the tip surface on the protruding side, a first vertical wall 23b that connects the surface 22a of the plate-shaped portion 22 and the first tip surface 23a, and a second vertical wall 23c that is connected to the first tip surface 23a and faces the first vertical wall 23b. In this embodiment, the second vertical wall 23c forms the design of the rear end of the vehicle C.

[0020] Furthermore, the protruding structure 23 has a space 23d defined by the first tip surface 23a, the first vertical wall 23b, the second vertical wall 23c, and the exterior member 21. The space 23d in this embodiment may house electrical components such as brake lights of the vehicle C, an imaging device, or various sensors.

[0021] 2, the fixing portion 24 is a portion of the resin member 2 that is fixed to the exterior member 21. In this embodiment, the fixing portion 24 is fixed by thermal welding, adhesive, or double-sided tape.

[0022] Next, the fastening structure 1 of this embodiment will be described. As shown in FIG. 1, the spoiler 20 is fastened to the structural body 4 of the vehicle C from above and protrudes rearward (in the direction of arrow S in FIGS. 1 and 2). The rearward protruding portion of such a spoiler 20 may collide with an object moving upward, and this collision may result in an upward load (hereinafter referred to as a thrust load). If the resin member 2 is made of a material that is relatively easy to deform, the resin member 2 may deform at the fastening portion with the structural body 4 and fall off from the structural body 4. The fastening structure 1 of this embodiment prevents the resin member 2 from falling off from the structural body 4 in this way.

[0023] The fastening structure 1 includes a base 6 that holds a fastening member 10 and a reinforcing member 8 that reinforces the base 6.

[0024] 2, a plurality of pedestals 6 may be provided on the resin member 2. In this embodiment, the pedestals 6 include a first pedestal 6a, a second pedestal 6b, a third pedestal 6c, and a fourth pedestal 6d. The first pedestal 6a to the fourth pedestal 6d are arranged at intervals on the surface 22a of the plate-shaped portion 22. However, the number and positions of the pedestals 6 can be changed depending on the size and shape of the resin member 2.

[0025] Fig. 3 is an exploded perspective view showing the base 6, the fastening member 10, and the reinforcing member 8. Fig. 4 is a perspective view showing the base 6, the fastening member 10, and the reinforcing member 8.

[0026] As shown in Figure 3, the fastening member 10 is a bolt 11 and a nut 12 (see Figure 1). The bolt 11 has an axis 10a, an insertion portion 10b that expands in a direction intersecting the axis 10a, and a countersunk portion 10c that expands in a direction intersecting the axis 10a and is parallel to the insertion portion 10b. The nut 12 receives and fixes the axis 10a. The insertion portion 10b and the countersunk portion 10c are arranged at a distance from each other in the direction in which the axis 10a extends.

[0027] The expansion size of the insertion portion 10b may be larger than that of the dish portion 10c. In this embodiment, the insertion portion 10b and the dish portion 10c are disk-shaped with the axis 10a at the center, and the diameter of the insertion portion 10b is larger than the diameter of the dish portion 10c. However, this is not limited thereto, and the insertion portion 10b and the dish portion 10c may be rectangular plates or the like.

[0028] In this embodiment, the shaft 10a includes a male thread, and the nut 12 includes a female thread that fits the male thread. In the fastened state, the extending direction of the shaft 10a coincides with the fastening direction in which the resin member 2 and the structure 4 are fastened (hereinafter referred to as the fastening direction of the fastening member 10). The fastening direction in this embodiment coincides with the direction of arrow Z, and also coincides with the up-down direction of the vehicle C (the direction of arrow H in FIG. 1) in the fastened state.

[0029] The base 6 is provided on the surface 22a of the plate-shaped portion 22 of the resin member 2, and protrudes from the plate-shaped portion 22 in a third direction Z that intersects with the first direction X and the second direction Y. In the fastened state, the base 6 protrudes from the plate-shaped portion 22 toward the structure 4 (see FIG. 1). In this embodiment, the third direction Z coincides with the up-and-down direction of the vehicle C (see arrow H in FIG. 1) and the fastening direction of the fastening member 10.

[0030] The base 6 has a first base surface 61, a second base surface 62, and a third base surface 63. Each of the base surfaces 61 to 63 is plate-shaped. An opening 60 is formed in the base 6 by a space defined by the first base surface 61, the second base surface 62, and the third base surface 63.

[0031] The first seating surface 61 is spaced apart from the surface 22a of the plate-shaped portion 22 in the third direction Z and extends parallel to the plate-shaped portion 22. The first seating surface 61 is configured to be able to attach a fastening member 10. The first seating surface 61 extends in a direction intersecting the fastening direction of the attached fastening member 10 and comes into contact with the attached fastening member 10.

[0032] The first seating surface 61 includes a notch 61a, a front surface 61b, and a back surface 61c opposite the front surface 61b. The notch 61a is a slit for attaching the fastening member 10 to the first seating surface 61 by insertion, and extends along the insertion direction of the fastening member 10 (see the black arrow in FIG. 3) and continues to the opening 60. The shaft 10a of the fastening member 10 is inserted into the notch 61a. This allows the seat 6 to restrict movement of the fastening member 10 in the in-plane direction of the first seating surface 61. The first seating surface 61 is sandwiched between the insertion portion 10b and the plate portion 10c of the fastening member 10. That is, the insertion portion 10b and the dish portion c10 extend from the axis 10a of the fastening member 10 along the first base surface 61, with the insertion portion 10b being disposed on the back surface 61c side of the first base surface 61 and the dish portion c10 being disposed on the front surface 61b side of the first base surface 61. This allows the base 6 to restrict movement of the fastening member 10 in a direction intersecting with the first base surface 61. As a result, the base 6 can hold the fastening member 10.

[0033] The opening 60 opens in the insertion direction of the fastening member 10. In the present embodiment, an example is shown in which the insertion direction of the fastening member 10 coincides with the second direction Y, but the present disclosure is not limited to this. In other words, the opening 60 and the insertion direction only need to be parallel to the plate-shaped portion 22, and may be the first direction X, the second direction Y, or a direction intersecting these.

[0034] The second pedestal surface 62 is connected to the first pedestal surface 61 and intersects with the first pedestal surface 61. The third pedestal surface 63 is connected to the first pedestal surface 61 and intersects with the first pedestal surface 61, and faces the second pedestal surface 62. The second pedestal surface 62 and the third pedestal surface 63 may be continuous on the side opposite the opening 60. In this embodiment, the second pedestal surface 62 and the third pedestal surface 63 are smoothly connected by a curved surface.

[0035] The reinforcing member 8 is formed separately from the base 6 and hence from the resin member 2. The reinforcing member 8 is attached to the base 6 from the insertion direction (see the black arrow in FIG. 3) and covers the base 6.

[0036] The reinforcing member 8 has a first reinforcing surface 81, a second reinforcing surface 82 connected to the first reinforcing surface 81, a third reinforcing surface 83 connected to the first reinforcing surface 81 and facing the second reinforcing surface 82, a connecting portion 84 provided separately from the first reinforcing surface 81 and connecting the second reinforcing surface 82 and the third reinforcing surface 83, and a holding portion 85 that holds an end of the fastening member 10. Each of the reinforcing surfaces 81 to 83 and the connecting portion 84 is plate-shaped.

[0037] The first reinforcing surface 81 extends in the first direction X and the second direction Y. The first reinforcing surface 81 extends parallel to the first seating surface 61 of the seat 6 and covers at least a portion of the surface 61b of the first seating surface 61. When the reinforcing member 8 is in an attached state, the first reinforcing surface 81 is disposed between the surface 61b of the first seating surface 61 and the structure 4 (see FIG. 1).

[0038] When the resin member 2 receives the above-described thrust load, the resin member 2 attempts to move in a direction away from the structure 4. In FIGS. 3 and 4, this is equivalent to the fastening member 10 being pulled in the fastening direction (the direction of arrow Z in FIGS. 3 and 4). In this case, if a gap exists between the surface 61b of the first seating surface 61 and the structure 4 due to the presence of the dish portion c10 of the fastening member 10 or for other reasons, the first seating surface 61 may deform in the fastening direction, widening the notch 61a and allowing the insertion portion 10b to pass through. To prevent this from happening, in this embodiment, a first reinforcing surface 81 is disposed between the first seating surface 61 and the structure 4. By being sandwiched between the first seating surface 61 and the structure 4, the first reinforcing surface 81 fills the gap between the surface 61b of the first seating surface 61 and the structure 4 and suppresses deformation of the first seating surface 61 in the fastening direction.

[0039] Fig. 5 is a cross-sectional view showing the AA cross section of Fig. 4. Fig. 6 is a perspective view of the fastening structure, in which the reinforcing member is indicated by a broken line. Note that in Fig. 6, the fastening member 10 is omitted from the illustration.

[0040] 5, the first reinforcing surface 81 may overlap the insertion portion 10b of the fastening member 10 when viewed in the fastening direction (the direction of arrow Z in FIG. 5) (see overlapping portion 87 in FIG. 5). This causes the first seating surface 61 to directly receive force from the insertion portion 10b at the overlapping portion 87. By sandwiching such a portion between the first reinforcing surface 81 and the insertion portion 10b in the fastening direction, the first reinforcing surface 81 can suppress deformation of the first seating surface 61 in the fastening direction.

[0041] 4, the first reinforcing surface 81 may include an insertion hole 81a. The shaft 10a of the fastening member 10 is inserted into the insertion hole 81a, and the disk portion 10c of the fastening member 10 may be inserted therethrough. This allows the length of the first reinforcing surface 81 in the Y direction to be increased without interfering with the shaft 10a of the fastening member 10. This allows the first reinforcing surface 81 to have a larger overlapping area with the first seating surface 61. As a result, the first reinforcing surface 81 can suppress deformation of the first seating surface 61 along the fastening direction.

[0042] The second reinforcing surface 82 extends parallel to the second seating surface 62 of the base 6 and faces the second seating surface 62. The third reinforcing surface 83 extends parallel to the third seating surface 63 of the base 6 and faces the third seating surface 63. That is, as shown in FIG. 5 , the base 6 is sandwiched between the second reinforcing surface 82 and the third reinforcing surface 83 in a direction (arrow X direction in FIG. 5 ) intersecting the fastening direction (arrow Z direction in FIG. 5 ). This prevents the second seating surface 62 and the third seating surface 63 from deforming in a direction separating them in response to deformation of the first seating surface 61 in the fastening direction, and the reinforcing member 8 can suppress deformation of the base 6 in the direction intersecting the fastening direction.

[0043] The connecting portion 84 is provided separately from the first reinforcing surface and connects the second reinforcing surface 82 and the third reinforcing surface 83. This allows the reinforcing member 8 to suppress deformation that would spread in the X direction of the second seating surface 62 and the third seating surface 63 near the opening 60. The connecting portion 84 of the present embodiment connects the second reinforcing surface 82 and the third reinforcing surface 83, and is connected to the first reinforcing surface 81. However, the connecting portion 84 is not limited to this and may be a columnar shape extending in a direction intersecting with the third direction Z as long as it connects a portion of the second reinforcing surface 82 and the third reinforcing surface 83.

[0044] The connecting portion 84 covers the opening 60 of the base 6 from the insertion direction (see the black arrow in FIG. 3 ). This makes it possible to restrict movement of the fastening member 10 in the opposite direction to the Y direction, and also to suppress deformation of the second base surface 62 and the third base surface 63 that would otherwise spread in the X direction at the opening-side ends of the second base surface 62 and the third base surface 63.

[0045] As shown in FIG. 3, the retaining portion 85 is a plate member extending from the connecting portion 84. In the attached state of the reinforcing member 8, the tip of the retaining portion 85 may reach the inside of the base 6. In this embodiment, the retaining portion 85 is disposed inside the base 6 and extends to the connecting portion 65 between the base 6 and the plate-shaped portion 22. As shown in FIG. 5, in the attached state, the retaining portion 85 may come into contact with the insertion portion 10b of the fastening member 10. This allows the retaining portion 85 to restrict movement of the fastening member 10 in the fastening direction (the direction of arrow Z in FIG. 5).

[0046] 6, the holding portion 85 has a claw portion 86. The claw portion 86 is arranged on the back side of the holding portion 85 (a surface 102 opposite to a surface 101 that contacts the insertion portion 10b of the fastening member 10). When the reinforcing member 8 is attached to the base 6, the claw portion 86 may be engaged with an end of the through hole 25 formed in the plate-shaped portion 22, thereby fixing the position of the reinforcing member 8 relative to the base 6.

[0047] The reinforcing member 8 is made of a thermoplastic resin or a metal. The thermoplastic resin is, for example, polypropylene (PP), which is the same material as the resin member 2. This allows the resin member 2 to be disposed of without being separated into the reinforcing member 8 and the resin member 2. This improves the recyclability of the resin member 2 and the reinforcing member 8.

[0048] The reinforcing member 8 may be made of a material different from that of the resin member 2. The thermoplastic resin that forms the reinforcing member 8 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). The metal that forms the reinforcing member 8 may be selected from, for example, iron, aluminum, and alloys containing these.

[0049] Furthermore, when the reinforcing member 8 is made of a material different from that of the resin member 2, it is preferable that the reinforcing member 8 be made of a material having a higher elastic modulus than that of the resin member 2. This allows the reinforcing member 8 to suppress deformation of the base 6 due to a load input to the resin member 2.

[0050] The fastening structure 1 of the present disclosure is provided on the surface 22a of the plate-like portion 22 of the resin member 2, and includes a seat 6 and a reinforcing member 8. The seat 6 has a first seat surface 61 that intersects with the fastening direction of the reinforcing member 8 and comes into contact with the fastening member 10. The reinforcing member 8 covers at least a portion of the surface of the first seat surface 61 and is provided with an insertion hole 80 through which the fastening member 10 is inserted.

[0051] This allows the reinforcing member 8 to cover the first pedestal surface 61 in the fastening direction while holding the fastening member 10. Furthermore, the reinforcing member 8 can fill the gap between the pedestal 6 and the structure 4 in the fastened state. Therefore, when the first pedestal surface 61 receives a load in the fastening direction via the fastening member 10, the reinforcing member 8 can suppress deformation of the first pedestal surface 61 in the fastening direction. As a result, the fastening structure 1 can prevent the pedestal 6, and therefore the resin member 2, from falling off from the fastening member 10 and the structure 4 due to deformation of the pedestal 6.

[0052] The base 6 may have a second base surface 62 and a third base surface 63. The reinforcing member 8 may have a second reinforcing surface 82 facing the second base surface 62, a third reinforcing surface 83 facing the third base surface 63, and a connecting portion 84.

[0053] This allows the reinforcing member 8 to prevent the second seating surface 62 and the third seating surface 63 connected to the first seating surface 61 from being deformed due to the load that the first seating surface 61 receives via the fastening member 10.

[0054] Furthermore, the base 6 may have an opening 60, and the first base surface 61 may include a notch 61a that is continuous with the opening 60 and into which the fastening member 10 is inserted. The connecting portion 84 may cover the opening from the insertion direction in which the fastening member 10 is inserted.

[0055] As a result, the reinforcing member 8 can suppress deformation of the first seating surface 61, the second seating surface 62, and the third seating surface 63 near the opening 60.

[0056] The fastening member 10 may also have a shaft 10a extending in the fastening direction, and an insertion portion 10b extending from the shaft 10a along the first seating surface 61 and disposed on the back surface 61c of the first seating surface 61. The insertion portion 10b may overlap the first reinforcing surface 81 when viewed in the fastening direction.

[0057] This allows the reinforcing member 8 to sandwich the first seat surface 61 in the fastening direction together with the insertion portion 10b of the fastening member 10. This allows the reinforcing member 8 to suppress deformation of the seat 6 and therefore the resin member 2.

[0058] As described above, the fastening structure of the present disclosure can provide a novel fastening structure that can suppress deformation of a resin member that holds a fastening member.

[0059] 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.

[0060] In the present embodiment, the second reinforcing surface 82 and the third reinforcing surface 83 are arranged so as to cover the base 6, but the present disclosure is not limited to this. That is, the second reinforcing surface 82 and the third reinforcing surface 83 may be arranged inside the base 6 to restrict movement and deformation of the second base surface 62 and the third base surface 63. In this way, the second reinforcing surface 82 and the third reinforcing surface 83 can suppress deformation, such as stretching, of the second base surface 62 and the third base surface 63 that accompanies movement of the first base surface 61 along the fastening direction.

[0061] In the present embodiment, the bolt 11 held by the base 6 has been described as an example, but the present disclosure is not limited thereto. The base 6 may hold a nut 12, and the bolt 11 may be inserted from the structural body 4 side toward the resin member 2 and fastened. [Explanation of symbols]

[0062] 1: Fastening structure 2: Resin member 4: Structure 6: Base 8: Reinforcing member 10: Fastening member 60: Opening 61: First base surface 61a: Notch 62: Second base surface 63: Third base surface 81: First reinforcing surface 82: Second reinforcing surface 83: Third reinforcing surface 84:Connection part

Claims

1. A fastening structure for fastening a resin member to a structure by a fastening member, a base provided on a surface of the resin member, the base having a first base surface that intersects with the fastening direction of the fastening member and comes into contact with the fastening member; a reinforcing member covering at least a portion of the surface of the first seating surface and having a first reinforcing surface with an insertion hole through which the fastening member is inserted; Equipped with Fastening structure.

2. the base has a second base surface connected to the first base surface and intersecting the first base surface, and a third base surface connected to the first base surface and facing the second base surface, The reinforcing member has a second reinforcing surface connected to the first reinforcing surface and facing the second base surface, a third reinforcing surface connected to the first reinforcing surface and facing the third base surface opposite the second reinforcing surface, and a connecting portion provided separately from the first reinforcing surface and connecting the second reinforcing surface and the third reinforcing surface. The fastening structure according to claim 1 .

3. the base has an opening formed in the first base surface, the second base surface, and the third base surface; the first seat surface includes a notch that is continuous with the opening and into which the fastening member is inserted, The connecting portion covers the opening from an insertion direction in which the fastening member is inserted. The fastening structure according to claim 2 .

4. the fastening member has a shaft extending in the fastening direction, and an insertion portion extending from the shaft along the first seat surface and disposed on a back surface side of the first seat surface, The insertion portion overlaps with the first reinforcing surface when viewed in the fastening direction. The fastening structure according to claim 1 .

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