Mounting structure and mounting member for manufacturing the same

Abstract

To provide a mounting structure that easily ensures mounting strength of a mounting member to a mounting object, and a mounting member for manufacturing the mounting structure.SOLUTION: A mounting member comprises a caulking member and a first additional member. The caulking member comprises a general part, and a deformed caulking part provided on one axial side of the general part. The first additional member is positioned between the deformed caulking part and a peripheral portion of a first hole in a first plate part. The first additional member contacts one side surface of the peripheral portion of the first hole in the first plate part.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a mounting structure and a mounting member for manufacturing the same. [Background technology]

[0002] Patent Document 1 discloses a mounting method for mounting a fastening member to a plate material by electric crimping. In addition, electric crimping is a method in which a member having a crimped portion (crimped member) is sandwiched between electrodes and electricity is passed through it, causing the crimped portion to be locally heated and softened, and the crimped portion is deformed by the pressure applied by the electrodes, thereby joining the crimped member to another member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2022 / 004890 Summary of the Invention [Problem to be solved by the invention]

[0004] In a mounting structure manufactured by the mounting method disclosed in Patent Document 1, the deformed crimped portion comes into contact with one side surface of the peripheral portion of the hole in the plate material.

[0005] An object of one embodiment of the present disclosure is to provide a mounting structure that makes it easy to ensure the mounting strength of a mounting member relative to an object to be mounted, and a mounting member for manufacturing the same. [Means for solving the problem]

[0006] The gist of the present disclosure is as follows.

[0007] <1> A mounting structure in which a mounting member is attached to a mounting target, The attachment target includes a first plate portion having a first hole formed therein, the mounting member is joined to the first plate portion by sandwiching a peripheral portion of the first hole in the first plate portion, The mounting member includes a crimping member and a first additional member, The crimping member includes a general portion and a deformed crimping portion provided on one axial side of the general portion, The first additional member is The first plate portion is disposed between the peripheral portion of the first hole and the deformed crimp portion, contacting one side surface of the peripheral portion of the first hole in the first plate portion; Mounting structure.

[0008] This aspect relates to a mounting structure in which a mounting member is attached to an object to be mounted. In this aspect, the attachment target includes a first plate portion having a first hole formed therein, while the attachment member is joined to the first plate portion by sandwiching a peripheral portion of the first hole in the first plate portion with the attachment member.

[0009] In the case where the deformed crimping portion is in contact with one side of the peripheral portion of the first hole of the first plate portion, it is preferable that the deformed crimping portion and the one side of the peripheral portion are in proper contact from the viewpoint of securing the mounting strength. However, it may be difficult to control the shape of the deformed crimping portion so that it is in proper contact with the peripheral portion. Therefore, in this aspect, the mounting member includes a crimping member and a first additional member. The crimping member includes a general portion and a deformed crimping portion provided on one axial side of the general portion. The first additional member is disposed between a peripheral portion of the first hole in the first plate portion and the deformed crimping portion. The first additional member contacts one side of the peripheral portion of the first hole in the first plate portion. Therefore, it is the first additional member, not the deformed crimping portion, that comes into contact with one side surface of the peripheral portion of the first hole in the first plate portion. The shape of the first additional member is easier to control than the shape of the deformed crimping portion. Therefore, it is easier to achieve an appropriate contact state with the one side surface of the first plate portion compared to the mode in which the deformed crimping portion comes into contact with one side surface of the peripheral portion of the first hole in the first plate portion.

[0010] As described above, according to this aspect, it is easy to ensure the mounting strength of the mounting member relative to the object to which it is attached.

[0011] In the embodiment described later, the mounting member is a traction nut, but the mounting member of this embodiment is not limited to this. The mounting member of this embodiment may be a fastening member (nut, bolt, etc.) other than a traction nut, or may not be a fastening member. In the embodiment described later, the peripheral portion of the first hole in the first plate portion is not flat and perpendicular to the axial direction, but the peripheral portion of the first hole in the first plate portion of the present embodiment is not limited to this. The peripheral portion of the first hole in the first plate portion of the present embodiment may be flat and perpendicular to the axial direction.

[0012] <2> The peripheral portion of the first hole in the first plate portion is not a flat plate shape perpendicular to the axial direction, A plate contact surface that is a surface that contacts the one side surface of the first plate portion of the first additional member is formed to follow the one side surface of the peripheral portion of the first hole in the first plate portion. <1> The mounting structure according to claim 1.

[0013] In this embodiment, the peripheral portion of the first hole in the first plate portion is not in the shape of a flat plate perpendicular to the axial direction. For this reason, it is difficult to achieve an appropriate contact state with one side surface of the first plate portion compared to when the peripheral portion of the first hole in the first plate portion has a flat shape perpendicular to the axial direction. Also, the peripheral portion of the first hole in the first plate portion may be significantly deformed by the electric crimping, which may deteriorate the performance of the attachment target. Therefore, in this embodiment, the plate contact surface of the first additional member (the surface that contacts one side of the first plate portion in the first additional member) is formed to fit along the peripheral portion of the first hole in the first plate portion. This makes it easier to achieve an appropriate state of contact with the one side surface of the first plate portion, and also suppresses deformation of the peripheral portion of the first hole in the first plate portion.

[0014] In the embodiment described later, the peripheral portion of the first hole in the first plate portion has a flat plate shape inclined with respect to a plane perpendicular to the axial direction. However, the peripheral portion of the first hole in the first plate portion of this embodiment is not limited to this and may have, for example, a curved plate shape. In the embodiment described below, the plate contact surface of the first additional member contacts the periphery of the first hole in the first plate portion over the entire circumference. However, the plate contact surface of this embodiment is not limited to this.

[0015] <3> The crimped portion contact surface, which is a surface that contacts the deformed crimped portion of the first additional member, faces a direction parallel to the axial direction, <2> The mounting structure according to claim 1.

[0016] According to this aspect, it is easy to achieve an appropriate contact state between the first additional member and the deformed crimped portion.

[0017] <4> The attachment target includes a second plate portion having a second hole formed therein, The crimping member has a portion disposed within the second hole. <1> ~ <3> 13. A mounting structure according to any one of the preceding claims.

[0018] According to this aspect, the axis of the crimping member is prevented from tilting.

[0019] <5> The crimping member is joined to a peripheral portion of the second hole in the second plate portion by welding. <4> The mounting structure according to claim 1.

[0020] According to this aspect, the crimping member is prevented from rotating around the axis.

[0021] <6> The crimping member includes a flange portion disposed on the other axial side of the second plate portion. <4> or <5> The mounting structure according to claim 1.

[0022] According to this aspect, the entirety of the general portion of the crimping member is prevented from passing through the second hole in the second plate portion.

[0023] <7> The peripheral portion of the second hole in the second plate portion is not a flat plate shape perpendicular to the axial direction, The flange portion has a shape that follows the other side surface of the peripheral portion of the second hole in the second plate portion. <6> The mounting structure according to claim 1.

[0024] According to this aspect, the crimping member is prevented from rotating around the axis.

[0025] <8> The peripheral portion of the first hole in the first plate portion is not a flat plate shape perpendicular to the axial direction, The mounting member includes a second additional member; The second additional member is disposed between the peripheral portion of the first hole in the first plate portion and the general portion; contacting the other side surface of the peripheral portion of the first hole in the first plate portion; A plate contact surface that is a surface of the second additional member that contacts the other side surface of the first plate portion is formed along the other side surface of the peripheral portion of the first hole in the first plate portion. <1> ~ <7> 13. A mounting structure according to any one of the preceding claims.

[0026] In this embodiment, the peripheral portion of the first hole in the first plate portion is not in the shape of a flat plate perpendicular to the axial direction. Therefore, if the general portion of the crimping member contacts the other side of the peripheral portion of the first hole in the first plate portion, in order to achieve an appropriate contact state, it is necessary to form a surface on the general portion of the crimping member that conforms to the other side of the peripheral portion of the first hole in the first plate portion. Therefore, in this aspect, the mounting member includes a second additional member. The second additional member is disposed between the peripheral portion of the first hole in the first plate portion and the general portion. As a result, the second additional member contacts the other side of the peripheral portion of the first hole in the first plate portion. The plate contact surface of the second additional member (the surface of the second additional member that contacts the other side of the first plate portion) is formed to fit along the other side of the peripheral portion of the first hole in the first plate portion. Therefore, there is no need to form a surface on the general portion of the crimping member that fits along the other side surface of the peripheral portion of the first hole in the first plate portion.

[0027] In the embodiment described below, the second additional member has the same shape as the first additional member, but the second additional member of this embodiment is not limited to this.

[0028] <9> The shape of the crimping member is rotationally symmetrical with respect to the axis. <8> The mounting structure according to claim 1.

[0029] According to this aspect, the crimping member can be easily manufactured. In the embodiment (second embodiment) described later, the shape of the crimping member has n-fold symmetry with respect to an arbitrary integer n, but this embodiment is not limited to this. The shape of the crimping member of this embodiment may have 6-fold symmetry. In this case, for example, the crimping member has a cross-sectional shape of a regular hexagon.

[0030] <10> The mounting member is a traction nut. <1> ~ <9> 13. A mounting structure according to any one of the preceding claims.

[0031] In this embodiment, the attachment member is a traction nut. Therefore, the traction nut can be appropriately attached to the automobile component as the attachment target. In the embodiment described later, the axial direction (pressure direction) is parallel to the vehicle body front-rear direction. When towing a vehicle, the force acting on the towing hook in the vehicle body front-rear direction is usually strongest, so the axial direction (pressure direction) is preferably parallel to the vehicle body front-rear direction. However, the axial direction in this embodiment is not limited to this. In the embodiment described below, the object to be attached is a bumper reinforcing member. However, the object to be attached in this embodiment is not limited to this, and may be an automobile part other than the bumper reinforcing member.

[0032] <11> A mounting member for mounting to an object, The attachment target includes a first plate portion having a first hole formed therein, the mounting member is joined to the first plate portion by sandwiching a peripheral portion of the first hole in the first plate portion, The mounting member includes a crimping member and a first additional member, The crimping member includes a general portion and a crimping portion provided on one axial side of the general portion, The first additional member is a deformed crimping portion disposed between the peripheral portion of the first hole in the first plate portion and the deformed crimping portion; The first hole is in contact with one side surface of the peripheral portion of the first plate portion. Mounting parts.

[0033] <12> The peripheral portion of the first hole in the first plate portion is not a flat plate shape perpendicular to the axial direction, A plate contact surface that is a surface that contacts the one side surface of the first plate portion of the first additional member is formed along the peripheral portion of the first hole in the first plate portion. <11> The mounting member described in

[0034] <13> The crimped portion contact surface, which is a surface that contacts the deformed crimped portion of the first additional member, faces a direction parallel to the axial direction, <12> The mounting member described in

[0035] <14> The attachment target includes a second plate portion having a second hole formed therein, The crimping member includes a flange portion disposed on the other axial side of the second plate portion. <11> ~ <13> 13. A mounting member according to any one of the preceding claims.

[0036] <15> The peripheral portion of the first hole in the first plate portion is not a flat plate shape perpendicular to the axial direction, The mounting member includes a second additional member; The second additional member is disposed between the peripheral portion of the first hole in the first plate portion and the general portion; contacting the other side surface of the peripheral portion of the first hole in the first plate portion; A plate contact surface that is a surface of the second additional member that contacts the other side surface of the first plate portion is formed along the other side surface of the peripheral portion of the first hole in the first plate portion. <11> ~ <14> 13. A mounting member according to any one of the preceding claims. [Brief description of the drawings]

[0037] [Figure 1] FIG. 4 is a cross-sectional view showing a state before a mounting member is attached in the first embodiment. [Diagram 2] FIG. 4 is a cross-sectional view showing a crimping preparation state in the first embodiment. [Diagram 3] FIG. 2 is a cross-sectional view showing a portion of the mounting structure of the first embodiment. [Figure 4] FIG. 2 is a perspective view of a first additional member; [Diagram 5] FIG. 11 is a cross-sectional view showing a state before the mounting member is attached in the second embodiment. [Figure 6] FIG. 11 is a cross-sectional view showing a crimping preparation state in a second embodiment. [Figure 7] FIG. 11 is a cross-sectional view showing a portion of a mounting structure according to a second embodiment. [Figure 8] FIG. 11 is a cross-sectional view showing a state before the mounting member is attached in the third embodiment. [Figure 9] FIG. 11 is a cross-sectional view showing a crimping preparation state in a third embodiment. [Figure 10] FIG. 11 is a cross-sectional view showing a portion of a mounting structure according to a third embodiment. [Figure 11] 5A to 5C are schematic diagrams showing variations in the shape of a bumper reinforcing member. [Figure 12] 3 is a cross-sectional view of the bumper reinforcing member cut along a plane perpendicular to the vehicle body width direction. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0038] First Embodiment First, a first embodiment of the present disclosure will be described.

[0039] <Summary> 3, the mounting structure 100 is a structure in which a mounting member 30 is attached to a mounting target 20. That is, the mounting structure 100 includes the mounting target 20 and the mounting member 30 attached to the mounting target 20. In this embodiment, the mounting structure 100 is a bumper reinforcement member having a traction nut attached thereto (a bumper reinforcement member with a traction nut).

[0040] As shown in FIG. 1, the attachment target 20 includes a first plate portion 21A in which a first hole 23 is formed, and a second plate portion 22A in which a second hole 24 is formed. In this embodiment, the mounting object 20 is a bumper reinforcing member. The bumper reinforcing member is a frame member that extends in the vehicle width direction at the front part of the vehicle body.

[0041] The mounting member 30 is a member to be attached to the mounting object 20 . In this embodiment, the mounting member 30 is a fastening member (also called a towing nut) for screwing in a bolt portion of a towing hook (not shown). The towing hook is a hook used for towing an automobile.

[0042] As shown in FIG. 1, the mounting member 30 is composed of a crimping member 40 and a first additional member 50A.

[0043] The crimping member 40 includes a general portion 41 and a crimping portion 42 provided on one axial side of the general portion 41. The general portion 41 is a portion that is hardly deformed in a crimping and joining process described later, whereas the crimped portion 42 is a portion that is significantly deformed in the crimping and joining process. The crimping member 40 is configured such that, when it is sandwiched between electrodes with the axial direction being the pressure direction and electricity is passed through it, the crimping portion 42 locally heats up and softens, and the crimping portion 42 is deformed by the pressure applied by the electrodes.

[0044] The method of attaching the attachment member 30 to the attachment target 20 includes the following steps. Arrangement step: The crimping member 40 and the first additional member 50A are arranged at predetermined positions relative to the attachment object 20 (a crimping preparation state, see FIG. 2). Crimping and joining step: In a crimping preparation state, electric crimping is performed to deform the crimped portion 42, thereby joining the mounting member 30 to the first plate portion 21A. Welding step: The crimping member 40 is joined to the peripheral portion of the second hole 24 in the second plate portion 22A by arc welding.

[0045] In the arrangement step, the crimping member 40 is inserted from the second hole 24 side of the attachment target 20, and the tip of the crimping portion 42 is caused to protrude from one side surface 21A1 of the first plate portion 21A. In addition, one end surface 41A of the general portion 41 of the crimping member 40 is brought into contact with the other side surface 21A2 of the first plate portion 21A. In the arrangement step, the first additional member 50A is arranged on one side surface 21A1 of the first plate portion 21A. The first additional member 50A is a cylindrical member. The first additional member 50A is arranged so that the crimping portion 42 of the crimping member 40 fits inside the cylindrical first additional member 50A.

[0046] In the crimping and joining process, electric crimping is performed in a crimping preparation state. The term "electrical crimping" used here refers to clamping the crimping member 40 from both axial sides between a pair of electrodes, and applying electricity and pressure to the crimping member 40. By performing electric crimping, the crimped portion 42 is locally deformed.

[0047] 3, the deformed crimping portion 42D (deformed crimping portion) is deformed so as to expand radially outward of the crimping member 40 when the crimping portion 42 (see FIG. 2) before deformation is used as a reference. Therefore, the first additional member 50A is pressed to the other axial direction side by the portion of the deformed crimping portion 42D that expands radially outward. The pressed first additional member 50A presses the peripheral portion of the first hole 23 in the first plate portion 21A to the other axial direction side. As a result, the peripheral portion of the first hole 23 in the first plate portion 21A is sandwiched between the general portion 41 of the crimping member 40 and the first additional member 50A. As a result, the mounting member 30 is joined to the first plate portion 21A.

[0048] In the welding process, the crimping member 40 is joined to the peripheral portion of the second hole 24 in the second plate portion 22A by welding (for example, arc welding). By joining the crimping member 40 to the second plate portion 22A, the attachment strength of the attachment member 30 to the attachment target 20 can be ensured. Specifically, resistance to pulling out and pushing in the crimping member 40 in the axial direction and resistance to rotation (idling) of the crimping member 40 about the axis can be ensured. This welding may be performed around the entire periphery of the periphery of the second hole 24. In this case, the attachment strength of the attachment member 30 to the attachment target 20 can be improved. On the other hand, this welding may be performed partially at several points in the circumferential direction of the periphery of the second hole 24. In this case, the time required for the welding process can be shortened, and as a result, the time required for the attachment process can be shortened.

[0049] As shown in FIG. 1 and other figures, the peripheral portion of the first hole in the first plate portion 21A is inclined with respect to a plane perpendicular to the axial direction of the crimping member 40 (a virtual plane, not shown). Therefore, of the general portion 41 of the crimping member 40, a surface (one-side end surface 41A) that contacts the peripheral portion of the first hole 23 in the first plate portion 21A is formed so as to be inclined with respect to a plane perpendicular to the axial direction. Also, of the first additional member 50A, a surface (other-side bottom surface 52) that contacts the peripheral portion of the first hole 23 in the first plate portion 21A is also formed so as to be inclined with respect to a plane perpendicular to the axial direction. As a result, the general portion 41 of the crimping member 40 and the first additional member 50A have a shape suitable for sandwiching the peripheral portion of the first hole 23 in the first plate portion 21A. Furthermore, of the first additional member 50A, the surface (one-side bottom surface 51) that comes into contact with the deformed crimping portion 42D is not inclined with respect to a plane perpendicular to the axial direction, and extends parallel to the plane perpendicular to the axial direction. As described above, in this embodiment, when the peripheral portion of the first hole 23 in the first plate portion 21A is inclined with respect to a plane perpendicular to the axial direction, it is easy to achieve an appropriate clamping state of the peripheral portion.

[0050] In this embodiment, the peripheral portion of the second hole 24 in the second plate portion 22A is also inclined with respect to a plane perpendicular to the axial direction.

[0051] In this embodiment, the axial direction is parallel to the front-rear direction of the vehicle body, and the other axial side is the front side of the vehicle body. In other words, the mounting structure 100 of this embodiment has a structure in which the bolt portion of the towing hook is screwed in from the other axial side.

[0052] Each component will be described in more detail below.

[0053] <20 mounting targets> The mounting object 20, which is the bumper reinforcing member 20, will be described.

[0054] FIG. 12 is a cross-sectional view of the attachment object 20 cut along a plane perpendicular to the vehicle body width direction, which is the longitudinal direction of the attachment object 20.

[0055] The attachment target 20 includes a first member 21 and a second member 22. The first member 21 is hat-shaped. That is, the first member 21 has a top plate portion 21A, a pair of vertical plate portions 21B, and a pair of flange portions 21C. The second member 22 is generally flat. The second member 22 has an opposing portion 22A opposing the top plate portion 21A, and a pair of joint portions 22B joined to the pair of flange portions 21C. As a result, the attachment target 20 has a closed cross-sectional structure extending in a direction perpendicular to the paper surface of the figure.

[0056] The first member 21 and the second member 22 are, for example, steel plates. Either or both of the first member 21 and the second member 22 may be a high-tensile steel plate of 1800 MPa or more, or may be a hot-stamped steel plate. The mounting target 20 is disposed in a position in which the second member 22 side (the lower side in FIG. 12 ) of the first member 21 and the second member 22 faces the front side of the vehicle.

[0057] A first hole 23 is formed in the top plate portion 21A of the first member 21. The first hole 23 has a substantially circular shape. The diameter d1 of the first hole 23 is slightly larger than the outer diameter R2 of the crimped portion 42 and is smaller than the outer diameter R1 of the shaft portion 43.

[0058] A second hole 24 is formed in the opposing portion 22A of the second member 22. The second hole 24 has a substantially circular shape. A diameter d2 of the second hole 24 is slightly larger than the outer diameter R1 of the shaft portion 43 and is smaller than the outer diameter R2 of the flange portion 44.

[0059] The plate thickness of the second member 22 is smaller than the plate thickness of the first member 21 .

[0060] FIG. 11 is a schematic diagram showing an assumed shape of the bumper reinforcing member 20 as viewed from above.

[0061] The mounting member 30, which is the traction nut 30, is mounted at the traction nut mounting position shown in Fig. 11. In other words, the position at which the traction nut 30 is mounted is a position shifted in the vehicle width direction from the center of the bumper reinforcing member 20 in the vehicle width direction.

[0062] The bumper reinforcing member 20 of this embodiment is assumed to have a shape shown in Fig. 11(c). In this bumper reinforcing member 20, both the top plate portion 21A of the first member 21 and the opposing portion 22A of the second member 22 at the traction nut attachment position are inclined with respect to a plane perpendicular to the vehicle front-rear direction. The top plate portion 21A of the first member 21 at the traction nut attachment position corresponds to the above-mentioned first plate portion 21A, and the facing portion 22A of the second member 22 at the traction nut attachment position corresponds to the above-mentioned second plate portion 22A.

[0063] <Crimping member 40> The general portion 41 of the crimping member 40 is composed of a shaft portion 43 . The shaft portion 43 has a cylindrical shape. A circular through-hole 43A is formed in the shaft portion 43, penetrating the shaft portion 43. Therefore, the shaft portion 43 can be said to have a cylindrical shape. The through-hole 43A of the shaft portion 43 is a screw hole. This screw hole is a screw hole into which a bolt portion of a towing hook is screwed.

[0064] The crimped portion 42 has a cylindrical shape formed coaxially with the shaft portion 43. The outer diameter R2 of the crimped portion 42 is smaller than the outer diameter R1 of the shaft portion 43. The crimped portion 42 has a circular through hole 42A penetrating the crimped portion 42. Therefore, the crimped portion 42 can also be said to have a cylindrical shape. The through hole 42A of the crimped portion 42 is formed coaxially with the through hole 43A of the shaft portion 43 and is connected to the through hole 43A of the shaft portion 43. Therefore, the through hole 43A of the shaft portion 43 and the through hole 42A of the crimped portion 42 form through holes 42A, 43A penetrating the crimped member 40 in the axial direction. The through hole 42A of the crimped portion 42 is not a screw hole, but may be a screw hole. An inner diameter r2 of the crimped portion 42 is larger than an inner diameter r1 of the shaft portion 43 (maximum diameter, root diameter of the screw hole). The thickness ((R2-r2) / 2) of the crimped portion 42 is smaller than the thickness ((R1-r1) / 2) of the shaft portion 43, and is, for example, 80% or less.

[0065] The crimping member 40 is integrally formed of the same material as a whole. Specifically, the crimping member 40 is made of metal, and more specifically, of steel.

[0066] A one-side end face 41A generally facing one axial side is formed at one axial end of the general portion 41. The one-side end face 41A of the shaft portion 43 is a surface located around the crimped portion 42 when the crimped member 40 is viewed from one axial side, and is a surface extending in an annular shape.

[0067] The one-side end surface 41A contacts the other side surface 21A2 of the peripheral portion of the first hole 23 in the first plate portion 21A. The other side surface 21A2 of the peripheral portion of the first hole 23 in the first plate portion 21A is inclined with respect to the axial direction, and the one-side end surface 41A is also inclined with respect to the axial direction corresponding to this. As a result, the one-side end surface 41A is adapted to fit along the other side surface 21A2 of the peripheral portion of the first hole 23 in the first plate portion 21A.

[0068] The crimping member 40 is configured such that the crimping portion 42 is locally deformed by carrying out the crimping process. That is, the crimped portion 42 has a smaller cross-sectional area than the general portion 41 constituted by the shaft portion 43 because the crimped portion 42 has a thinner wall thickness than the general portion 41. Therefore, the crimped portion 42 has a smaller bearing strength than the general portion 41. Furthermore, the crimped portion 42 has a smaller wall thickness and a smaller cross-sectional area than the general portion 41 formed by the shaft portion 43, and therefore has a larger electrical resistance than the general portion 41. Therefore, the crimped portion 42 is locally heated and softened by the passage of electricity.

[0069] <First additional member 50A> The first additional member 50A is a member for sandwiching the peripheral portion of the first hole 23 of the first plate portion 21A between the first additional member 50A and the general portion 41 of the crimping member 40.

[0070] The first additional member 50A is a cylindrical member.

[0071] The first additional member 50A has a bottom surface 51 on one side and a bottom surface 52 on the other side.

[0072] The one side bottom surface 51 is a surface that comes into contact with the deformed crimping portion 42D. Hereinafter, the one side bottom surface 51 of the first additional member 50A may be referred to as the crimping portion contact surface 51. One side bottom surface 51 is a surface perpendicular to the axial direction.

[0073] The other-side bottom surface 52 is a surface that contacts one side surface 21A1 of the peripheral portion of the first hole 23 of the first plate portion 21A. Hereinafter, the other-side bottom surface 52 of the first additional member 50A may be referred to as the plate contact surface 52 of the first additional member 50A. One side surface 21A1 of the peripheral portion of the first hole 23 of the first plate portion 21A is inclined with respect to the axial direction, and correspondingly, the other-side bottom surface 52 of the first additional member 50A is also inclined with respect to a plane perpendicular to the axial direction. As a result, the other-side bottom surface 52 of the first additional member 50A is adapted to fit along one side surface 21A1 of the peripheral portion of the first hole 23 of the first plate portion 21A.

[0074] The first additional member 50A is disposed so as to surround, from the radially outer side, the portion of the crimped portion 42 of the crimped member 40 that protrudes from the first hole 23 of the first plate portion 21A toward the one side surface 21A1. An inner diameter r3 of the first additional member 50A is the same as or slightly larger than an outer diameter R2 of the crimped portion 42. This suppresses deformation of the portion of the crimped portion 42 that is disposed inside the first additional member 50A. If the inner diameter r3 of the first additional member 50A is slightly larger than the outer diameter R2 of the crimped portion 42, the arrangement of the first additional member 50A becomes easier.

[0075] <Mounting structure 100> FIG. 3 is a cross-sectional view showing a portion of the mounting structure 100. As shown in FIG.

[0076] The mounting structure 100 has the following configuration. That is, the root portion of the deformed crimping portion 42D is disposed within the first hole 23. The portion of the deformed crimping portion 42D other than the root portion protrudes from the first hole 23 toward the one side surface 21A1 of the first plate portion 21A, and is located on the one side surface 21A1 of the first plate portion 21A. The portion of the deformed crimping portion 42D protruding from the first additional member 50A is significantly deformed so as to spread outward in the radial direction when the undeformed crimping portion 42 (see FIG. 4) is used as a reference. The first additional member 50A is disposed between this portion of the deformed crimping portion 42D and the peripheral portion of the first hole 23 in the first plate portion 21A. One end face 41A of the general portion 41 is in contact with the other side face 21A2 of the first plate portion 21A. One end face 41A of the shaft portion 43 is in contact with the periphery of the first hole 23 in the first plate portion 21A. As a result, the peripheral portion of the first hole 23 in the first plate portion 21A is sandwiched between the first additional member 50A and the general portion 41 of the crimping member 40. General portion 41 can be divided into a portion located between first member 21 and second member 22, a portion located within second hole 24, and a portion located on the other side surface 22A2 side of second plate portion 22A. Of these, weld bead 90 is formed on the outer circumferential surface side of the portion located on the other side surface 22A2 side of second plate portion 22A.

[0077] Furthermore, the portion of the deformed crimped portion 42D that protrudes from the first additional member 50A is deformed so as to also expand radially inward when the crimped portion 42 (see FIG. 4) before deformation is used as a reference. In this embodiment, the other axial side is the front direction of the vehicle body, and the bolt portion of the towing hook is screwed in from the other axial side. However, instead of this, if the bolt portion of the towing hook is structured to be screwed in from one axial side, it is necessary that the bolt portion can pass inside the deformed crimped portion 42D. Such a configuration can be realized by making the inner diameter r2 of the crimped portion 42 sufficiently larger than the inner diameter r1 (maximum diameter, root diameter of the screw hole) of the shaft portion 43.

[0078] <Action and effect> Next, the effects of this embodiment will be described.

[0079] 1 to 3, in this embodiment, the attachment target 20 includes a first plate portion 21A in which a first hole 23 is formed. Meanwhile, the attachment member 30 is joined to the first plate portion 21A by sandwiching the peripheral portion of the first hole 23 in the first plate portion 21A with the attachment member 30.

[0080] Incidentally, if it is the deformed crimping portion 42D that comes into contact with one side surface 21A1 of the peripheral portion of the first hole 23 of the first plate portion 21A, it is preferable from the viewpoint of ensuring the mounting strength that the deformed crimping portion 42D and the one side surface 21A1 of the peripheral portion come into proper contact with each other. However, it may be difficult to control the shape of the deformed crimping portion 42D to a shape that properly comes into contact with the peripheral portion. 3, the mounting member 30 includes a crimping member 40 and a first additional member 50A. The crimping member 40 includes a general portion 41 and a deformed crimping portion 42D provided on one axial side of the general portion 41. The first additional member 50A is disposed between the peripheral portion of the first hole 23 in the first plate portion 21A and the deformed crimping portion 42D. The first additional member 50A contacts one side surface 21A1 of the peripheral portion of the first hole 23 in the first plate portion 21A. Therefore, it is the first additional member 50A, not the deformed crimping portion 42D, that comes into contact with one side surface 21A1 of the peripheral portion of the first hole 23 in the first plate portion 21A. The shape of the first additional member 50A is easier to control than the shape of the deformed crimping portion 42D. Therefore, it is easier to achieve an appropriate contact state with the one side surface 21A1 of the first plate portion 21A, compared to the mode in which the deformed crimping portion 42D comes into contact with the one side surface 21A1 of the peripheral portion of the first hole 23 in the first plate portion 21A.

[0081] As described above, according to this embodiment, the attachment strength of the attachment member 30 to the attachment target 20 can be easily ensured.

[0082] In this embodiment, as shown in Figs. 1 to 3, the peripheral portion of the first hole 23 in the first plate portion 21A is not in the shape of a flat plate perpendicular to the axial direction. Therefore, compared to when the peripheral portion of the first hole 23 in the first plate portion 21A has a flat plate shape perpendicular to the axial direction, it is difficult to realize an appropriate contact state with the one side surface 21A1 of the first plate portion 21A. In addition, the peripheral portion of the first hole 23 in the first plate portion 21A may be significantly deformed by the electric crimping, which may deteriorate the performance of the attachment object 20. For example, the first plate portion 21A may be cracked. In addition, when the attachment object 20 is a bumper reinforcing member 20, the performance of the bumper reinforcing member 20 may be deteriorated. In order to prevent such deformation, it becomes necessary to restrict the shape of the first plate portion 21A near the first hole 23. Therefore, in this embodiment, as shown in Figures 1 to 3, the plate contact surface 52 of the first additional member 50A (the surface that contacts one side 21A1 of the first plate portion 21A in the first additional member 50A) is formed to follow the peripheral portion of the first hole 23 in the first plate portion 21A. This makes it easy to achieve an appropriate contact state with the one side surface 21A1 of the first plate portion 21A. Also, deformation of the peripheral portion of the first hole 23 in the first plate portion 21A is suppressed.

[0083] In this embodiment, the crimped portion contact surface 51 of the first additional member 50A (the surface of the first additional member 50A that comes into contact with the deformed crimped portion 42D) faces in a direction parallel to the axial direction. This makes it easier to achieve an appropriate contact state between the first additional member 50A and the deformed crimped portion 42D.

[0084] In this embodiment, the attachment target 20 includes a second plate portion 22A in which a second hole 24 is formed. The crimping member 40 has a portion that is disposed within the second hole. Therefore, the axis of the crimping member 40 is prevented from tilting.

[0085] In this embodiment, the crimping member 40 is joined to the peripheral portion of the second hole 24 in the second plate portion 22A by welding. Therefore, the crimping member 40 is prevented from rotating around the axis.

[0086] Also, in this embodiment, the mounting member 30 is a traction nut. Therefore, the traction nut can be appropriately attached to the automobile component as the attachment object 20.

[0087] Second Embodiment Next, a mounting structure 200 according to a second embodiment of the present disclosure will be described with reference to FIGS.

[0088] First, the main differences from the first embodiment will be described.

[0089] In the first embodiment, the mounting member 30 is composed of the crimping member 40 and the first additional member 50A. In contrast, in the second embodiment, the mounting member 130 further includes a second additional member 50B in addition to the crimping member 140 and the first additional member 50A. The first additional member 50A in the second embodiment is a member for sandwiching the peripheral portion of the first hole 23 of the first plate portion 21A between the first additional member 50A and the second additional member 50B.

[0090] In the first embodiment, one end face 41A of the general portion 41 of the crimping member 40 is inclined with respect to a plane perpendicular to the axial direction. In contrast, in the second embodiment, one end face 141A of the general portion 141 of the crimping member 140 is a plane perpendicular to the axial direction. Therefore, in the second embodiment, the shape of the crimping member 140 is rotationally symmetric about the central axis AX, which makes it easy to manufacture the crimping member 140.

[0091] The second additional member 50B is disposed between one end face 141A of the general portion 141 of the crimping member 140 and the peripheral portion of the first hole 23 in the first plate portion 21A. The second additional member 50B may be joined in advance to the base portion of the crimped portion 42 of the crimped member 140 prior to the placement step.

[0092] The second additional member 50B is a member having the same shape and material as the first additional member 50A. Therefore, compared to a case where the second additional member 50B is a member having a different shape or material from the first additional member 50A, it is possible to standardize parts.

[0093] The second additional member 50B is disposed relative to the crimping member 140 such that one side bottom surface 51 of the second additional member 50B is oriented in contact with one side end surface 141A of the general portion 141 of the crimping member 140. The one side bottom surface 51 of the second additional member 50B may be referred to as the general portion contact surface 51. Further, the other-side bottom surface 52 of the second additional member 50B contacts the peripheral portion of the first hole 23 of the first plate portion 21A from the other axial side. The other-side bottom surface 52 of the second additional member 50B may be referred to as the plate contact surface 52 of the second additional member 50B.

[0094] <Action and effect> Next, the effects of this embodiment will be described. However, a description of the same functions and effects as those of the first embodiment will be omitted.

[0095] In this embodiment, as shown in Figs. 5 to 7, the peripheral portion of the first hole 23 in the first plate portion 21A is not in the shape of a flat plate perpendicular to the axial direction. Therefore, if general portion 141 of crimping member 140 contacts the other side 22A2 of the peripheral portion of first hole 23 in first plate portion 21A, in order to achieve an appropriate contact state, it is necessary to form a surface on general portion 141 of crimping member 140 that conforms to the other side 22A2 of the peripheral portion of first hole 23 in first plate portion 21A. Therefore, in this embodiment, as shown in Figs. 5 to 7, the mounting member 130 includes a second additional member 50B. The second additional member 50B is disposed between the peripheral portion of the first hole 23 in the first plate portion 21A and the general portion 141. As a result, the second additional member 50B comes into contact with the other side surface 22A2 of the peripheral portion of the first hole 23 in the first plate portion 21A. The plate contact surface 52 of the second additional member 50B (the surface of the second additional member 50B that comes into contact with the other side surface 22A2 of the first plate portion 21A) is formed so as to fit along the other side surface 22A2 of the peripheral portion of the first hole 23 in the first plate portion 21A. Therefore, there is no need to form a surface on the general portion 141 of the crimping member 140 that fits along the other side surface 22A2 of the peripheral portion of the first hole 23 in the first plate portion 21A.

[0096] Furthermore, in this embodiment, the shape of the crimping member 140 is rotationally symmetric with respect to the axis. Therefore, the crimping member 140 is easy to manufacture.

[0097] Third Embodiment Next, a mounting structure 300 according to a third embodiment of the present disclosure will be described with reference to FIGS.

[0098] In the first embodiment, the general portion 41 of the crimping member 40 does not include the flange portion 44. In contrast, in the third embodiment, the general portion 241 of the crimping member 240 includes the flange portion 44. Furthermore, in the first embodiment, the general portion 41 of the crimping member 40 is joined to the second plate portion 22A by arc welding, whereas in the third embodiment, the general portion 241 of the crimping member 240 is not joined to the second plate portion 22A by arc welding.

[0099] The general portion 241 of the crimping member 240 of the third embodiment includes a shaft portion 43 and a flange portion 44 .

[0100] The flange portion 44 is provided on the other axial side of the shaft portion 43. The flange portion 44 has a cylindrical shape formed coaxially with the shaft portion 43. The outer diameter R2 of the flange portion 44 is larger than the outer diameter R1 of the shaft portion 43. The flange portion 44 has a circular through hole 44A formed therethrough. Therefore, the flange portion 44 can also be said to have a cylindrical shape. The through hole 44A of the flange portion 44 is formed coaxially with the through hole 43A of the shaft portion 43 and is connected to the through hole 43A of the shaft portion 43.

[0101] The through hole 44A of the flange portion 44 is a screw hole, and is formed continuous with the screw hole serving as the through hole 43A of the shaft portion 43. However, the through hole 44A of the flange portion 44 does not have to be a screw hole.

[0102] A one-side end face 44B that faces generally toward one axial side is formed at one axial end of the flange portion 44. When the crimping member 240 is viewed from one axial side, the one-side end face 44B of the flange portion 44 is a surface that is formed around the shaft portion 43 and is a surface that extends in an annular shape. The one-side end face 44B of the flange portion 44 contacts or is close to the other side face 22A2 of the peripheral portion of the second hole 24 in the second plate portion 22A.

[0103] One end face 44B of the flange portion 44 is inclined with respect to a plane perpendicular to the axial direction. As a result, the one end face 44B of the flange portion 44 is formed so as to follow the other side face 21A2 of the peripheral portion of the second hole 24 of the second plate portion 22A. As a result, the one end face 44B of the flange portion 44 is in contact with or close to the peripheral portion of the second hole 24 of the second plate portion 22A over its entire circumference.

[0104] <Action and effect> Next, the effects of this embodiment will be described. However, a description of the same functions and effects as those of the first embodiment will be omitted.

[0105] In this embodiment, as shown in Figs. 8 to 10, the crimping member 240 includes a flange portion 44 disposed on the other axial side of the second plate portion 22A. This prevents the entirety of the general portion 241 of the crimping member 240 from passing through the second hole 24 of the second plate portion 22A.

[0106] In this embodiment, the peripheral portion of the second hole 24 in the second plate portion 22A is not flat and perpendicular to the axial direction. The flange portion 44 has a shape that fits along the other side surface 22A2 of the peripheral portion of the second hole 24 in the second plate portion 22A. Therefore, the crimping member 240 is prevented from rotating around the axis.

[0107] In this embodiment, the crimping member 240 is not joined to the second plate portion 22A. Therefore, the time required to attach the attachment member 230 can be shortened. However, as a modification of the third embodiment, the flange portion 44 of the crimping member 240 may be joined to the second plate portion 22A by arc welding or the like.

[0108] <Supplementary explanation> Although the preferred embodiments of the mounting structure and the mounting member for manufacturing the same according to the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments. The following is a supplementary explanation for confirmation.

[0109] In the above embodiment, the attachment target 20 is a bumper reinforcing member that extends in the vehicle width direction at the front end position of the automobile, but the attachment target of the present disclosure is not limited to this. The attachment target may be another automobile component (for example, a battery box or a subframe) or may be a non-automotive component.

[0110] In the above embodiment, the peripheral portion of the second hole 24 in the second plate portion 22A is inclined with respect to a plane perpendicular to the axial direction. However, the peripheral portion of the second hole 24 in the second plate portion 22A does not have to be inclined with respect to a plane perpendicular to the axial direction. For example, when the mounting object 20 is a bumper reinforcing member, the bumper reinforcing member may have a shape as shown in FIG. 11(b).

[0111] In the above embodiment, the attachment object 20 comprises a first plate portion 21A having a first hole 23 formed therein and a second plate portion 22A having a second hole 24 formed therein, but the attachment object of the present disclosure is not limited thereto. The attachment target does not necessarily have to include the second plate portion 22A in which the second hole 24 is formed.

[0112] In the above embodiment, the mounting member 30 is a traction nut, but the mounting member of the present disclosure is not limited thereto. The mounting member may be a fastening member other than a traction nut (nut, bolt, etc.). Furthermore, the attachment member does not have to be a fastening member.

[0113] In the above embodiment, in the crimping preparation state, the first additional member 50A is disposed on one side surface 21A1 of the first plate portion 21A, and is not joined to the first plate portion 21A by welding, etc. However, the present disclosure is not limited to this. The first additional member 50A may be joined to the first plate portion 21A by welding or the like in a crimping preparation state. In the above embodiment (second embodiment), in the crimping preparation state, the second additional member 50B is disposed on the other side surface 21A2 side of the first plate portion 21A, and is not joined to the first plate portion 21A by welding or the like. However, the present disclosure is not limited to this. Before the crimping member 140 is placed on the attachment target 20, the second additional member 50B may be joined in advance to the first plate portion 21A by welding or the like.

[0114] In the above embodiment, the mounting structure 100 has a structure into which the bolt portion of the towing hook is screwed from the other axial side. However, the mounting structure of the present disclosure is not limited to this, and may have a structure in which the bolt portion of the towing hook is screwed in from one axial side. In other words, the one axial side may be the front of the vehicle body (the outer side in the front-rear direction of the vehicle body).

[0115] In the above embodiment, the crimping portion has a cylindrical shape, but the crimping portion of the present disclosure is not limited to this. The crimped portion may have a tubular shape other than a cylindrical shape (for example, a hexagonal tubular shape). Furthermore, the crimping portion does not have to be cylindrical. In other words, the crimping portion may be cylindrical or prismatic without a through hole passing through in the axial direction.

[0116] In the above embodiment, the inner peripheral surface 53 of the first additional member 50A has a shape that fits the outer peripheral surface of the crimped portion, thereby making it possible to suppress deformation of the portion of the crimped portion 42 that is disposed inside the first additional member 50A. However, the inner circumferential surface of the first additional member of the present disclosure is not limited thereto.

[0117] In the above embodiment, the crimping portion contact surface 51 of the first additional member 50A is a flat surface facing a direction parallel to the axial direction. However, the crimping portion contact surface of the first additional member of the present disclosure is not limited thereto, and may not be a flat surface, for example.

[0118] In the above embodiment, the first additional member 50A contacts the peripheral edge portion of the first hole 23 of the first plate portion 21A over the entire circumference. However, the first additional member of the present disclosure is not limited to this, and does not have to be in contact with the peripheral portion of the first hole over a portion of its circumferential direction.

[0119] However, when the mounting member 30 and the mounting object 20 are joined by arc welding, problems such as poor penetration in the arc welding and hydrogen embrittlement may occur. In addition, the joining process takes a long time. Therefore, in the above embodiment, the first plate portion 21A of the attachment object 20 and the attachment member 30 are joined together by not using arc welding. Therefore, when joining the first plate portion 21A of the object 20 and the mounting member 30, problems such as poor penetration and hydrogen embrittlement in arc welding can be avoided, and the time required for the joining process can be shortened.

[0120] Furthermore, if the shape of the peripheral portion of the first hole 23 of the first plate portion 21A of the attachment object 20 is a flat plate shape perpendicular to the axial direction (pressure direction), it is relatively easy to uniformly clamp the peripheral portion in the circumferential direction between the deformed crimping portion 42D and the general portion 41 without using the first additional member 50A. However, the present disclosure does not exclude a case where the shape of the peripheral portion of the first hole 23 of the first plate portion 21A of the attachment target 20 is a flat plate shape perpendicular to the axial direction (pressure direction). Even in such a case, it may be effective to use the first additional member. [Explanation of symbols]

[0121] 20 Bumper reinforcement material (installation target) 21 First member 21A Top plate (first plate) 21A1 One side 21A2 Other side 21B Vertical plate part 21C Flange part 22 Second member 22A Opposing part (second plate part) 22A2 Other side 22B Joint 23 First hole 24 Second hole 30 Traction nut (mounting part) 40 Crimping parts 41 General section 41A One side end face 42 Crimping part 42A through hole 42A,43A through hole 42D Crimping part 43 Shaft 43A through hole 44 Flange part 44A through hole 44B One side end face 50A First additional member 51 One side bottom surface (crimp contact surface) 52 Bottom surface of other side (plate contact surface) 50B Second additional member 51 One side bottom surface (general part contact surface) 52 Bottom surface of other side (plate contact surface) 100 Mounting structure 130 Mounting material 140 Crimping parts 141 General section 141A One side end face 200 Mounting structure 230 Mounting parts 240 Crimping parts 241 General section 300 Mounting structure

Claims

1. A mounting structure in which a mounting member is attached to a mounting target, The attachment target includes a first plate portion having a first hole formed therein, the mounting member is joined to the first plate portion by sandwiching a peripheral portion of the first hole in the first plate portion, The mounting member includes a crimping member and a first additional member, The crimping member includes a general portion and a deformed crimping portion provided on one axial side of the general portion, The first additional member is The first plate portion is disposed between the peripheral portion of the first hole and the deformed crimp portion, contacting one side surface of the peripheral portion of the first hole in the first plate portion; Mounting structure.

2. The peripheral portion of the first hole in the first plate portion is not a flat plate shape perpendicular to the axial direction, A plate contact surface that is a surface that contacts the one side surface of the first plate portion of the first additional member is formed to follow the one side surface of the peripheral portion of the first hole in the first plate portion. The mounting structure according to claim 1 .

3. The crimped portion contact surface, which is a surface that contacts the deformed crimped portion of the first additional member, faces a direction parallel to the axial direction, The mounting structure according to claim 2 .

4. The attachment target includes a second plate portion having a second hole formed therein, The crimping member has a portion disposed within the second hole. The mounting structure according to claim 1 .

5. The crimping member is joined to a peripheral portion of the second hole in the second plate portion by welding. The mounting structure according to claim 4.

6. The crimping member includes a flange portion disposed on the other axial side of the second plate portion. The mounting structure according to claim 4.

7. The peripheral portion of the second hole in the second plate portion is not a flat plate shape perpendicular to the axial direction, The flange portion has a shape that follows the other side surface of the peripheral portion of the second hole in the second plate portion. The mounting structure according to claim 6.

8. The peripheral portion of the first hole in the first plate portion is not a flat plate shape perpendicular to the axial direction, The mounting member includes a second additional member; The second additional member is disposed between the peripheral portion of the first hole in the first plate portion and the general portion; contacting the other side surface of the peripheral portion of the first hole in the first plate portion; A plate contact surface that is a surface of the second additional member that contacts the other side surface of the first plate portion is formed along the other side surface of the peripheral portion of the first hole in the first plate portion. The mounting structure according to claim 1 .

9. The shape of the crimping member is rotationally symmetrical with respect to the axis. The mounting structure according to claim 8.

10. The mounting member is a traction nut. The mounting structure according to claim 1 .

11. A mounting member for mounting to an object, The attachment target includes a first plate portion having a first hole formed therein, the mounting member is joined to the first plate portion by sandwiching a peripheral portion of the first hole in the first plate portion, The mounting member includes a crimping member and a first additional member, The crimping member includes a general portion and a crimping portion provided on one axial side of the general portion, The first additional member is a deformed crimping portion disposed between the peripheral portion of the first hole in the first plate portion and the deformed crimping portion; The first hole is in contact with one side surface of the peripheral portion of the first plate portion. Mounting parts.

12. The peripheral portion of the first hole in the first plate portion is not a flat plate shape perpendicular to the axial direction, A plate contact surface, which is a surface that contacts the one side surface of the first plate portion of the first additional member, is formed along the peripheral portion of the first hole in the first plate portion. The mounting member of claim 11.

13. The crimped portion contact surface, which is a surface that contacts the deformed crimped portion of the first additional member, faces a direction parallel to the axial direction, The mounting member of claim 12.

14. The attachment target includes a second plate portion having a second hole formed therein, The crimping member includes a flange portion disposed on the other axial side of the second plate portion. The mounting member of claim 11.

15. The peripheral portion of the first hole in the first plate portion is not a flat plate shape perpendicular to the axial direction, The mounting member includes a second additional member; The second additional member is disposed between the peripheral portion of the first hole in the first plate portion and the general portion; contacting the other side surface of the peripheral portion of the first hole in the first plate portion; A plate contact surface that is a surface of the second additional member that contacts the other side surface of the first plate portion is formed along the other side surface of the peripheral portion of the first hole in the first plate portion. The mounting member of claim 11.

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