JP2017100310A - Joining structure of member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joining structure of a member which can enhance a joining strength.SOLUTION: A first member 12 made from metal has a plate shape, and a projection 16A swollen in a plate thickness direction is formed on an end 16 for joining. In a second member 20 made from a fiber-reinforced resin, a pair of sandwiching portions 24X and 24Y sandwich the end 16 for joining of the first member 12 in a state where the sandwiching portions come in close contact with the end from both ends in the plate thickness direction. Each of the pair of sandwiching portions 24X and 24Y has projection-like portions 24A and 24B along the projection 16A of the first member 12 and is set so as to have a substantially equal wall thickness over the whole region, and the wall thicknesses of both of the pair of sandwiching portions 24X and 24Y are set to be equal. Accordingly, the end 16 for joining of the first member 12 and the sandwiching portions 24X and 24Y of the second member 20 are mechanically strongly joined to each other, which improves the joining strength between the first member 12 and the second member 20.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a connecting structure for members.

  Patent Document 1 below discloses a structure in which a metal plate-like member is attached to a door inner panel made of fiber reinforced resin by insert molding. Briefly describing this structure, the plate-like member is integrally embedded in the plate thickness at the site around the opening formed in the door inner panel.

JP 2015-27830 A

  However, this prior art has room for improvement in terms of improving the bond strength.

  In view of the above fact, an object of the present invention is to obtain a joint structure of members that can improve the joint strength.

  The member coupling structure of the present invention described in claim 1 is a plate-shaped first member made of metal having a coupling end portion formed with a protruding portion bulging in the thickness direction, and the coupling. A pair of clamping portions that clamp the end portions in close contact from both sides in the plate thickness direction, and each of the pair of clamping portions includes a projecting portion along the projecting portion and substantially the entire area. And a second member made of fiber reinforced resin, which is set to an equal thickness, and the thicknesses of both the pair of sandwiching portions are set to be equal.

  According to the said structure, the metal 1st member is made into plate shape, and the protrusion part bulged in the plate | board thickness direction is formed in the edge part for a coupling | bonding. On the other hand, the second member made of fiber reinforced resin has the pair of sandwiching portions sandwiching the coupling end portions of the first member from both sides in the plate thickness direction. And each of a pair of clamping parts is provided with the projection-like part along the projection part of the end part for coupling, and it is set as the substantially equal thickness over the whole region, and both thickness of a pair of clamping parts is It is set equally. Therefore, since the coupling end of the first member and the clamping portion of the second member are mechanically firmly coupled, the coupling strength between the first member and the second member is improved.

  As described above, according to the member coupling structure of the present invention, there is an excellent effect that the coupling strength can be improved.

It is a perspective view which shows the joint structure to which the joint structure of the member which concerns on the 1st Embodiment of this invention was applied. It is an expanded sectional view which expands and shows the state cut | disconnected along 2-2 line | wire of FIG. It is a perspective view which shows the joint structure to which the joint structure of the member which concerns on the 2nd Embodiment of this invention was applied. It is a top view which shows the modification of the projection part of a 1st member, and the projection-shaped part of a 2nd member. FIG. 4A shows a first modification. FIG. 4B shows a second modification. FIG. 4C shows a third modification. FIG. 4D shows a fourth modification.

[First Embodiment]
A member coupling structure according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing a coupling structure of members according to the present embodiment, and FIG. 2 is an enlarged cross-sectional view showing a state cut along line 2-2 in FIG. As shown in these drawings, a coupling structure 10 to which a member coupling structure is applied has a structure in which two plate-like first members 12 and one plate-like second member 20 are coupled. It is assumed to be a body. The joint structure 10 is a structure (panel component) such as a vehicle floor panel or an upper back panel.

  The first member 12 is a metal member that constitutes both sides of the coupling structure 10, and includes a main body portion 14 and a coupling end portion 16. At the coupling end 16 of the first member 12, a projection-shaped projection 16 </ b> A that bulges in the thickness direction of the first member 12 is formed. The protrusion 16A is formed in a hollow truncated cone shape as an example, and the top portion 16T is circular in plan view.

  The second member 20 is a fiber reinforced resin member (panel component). The fiber reinforced resin (FRP) is a composite material in which fibers (for example, carbon fibers) are solidified with a resin. In the present embodiment, long fibers are applied to the fibers as an example. However, short fibers or the like may be applied to the fibers. The 2nd member 20 is provided with the main-body part 22 and a pair of clamping parts 24X and 24Y set to a total of two places. The main body 22 has a flat plate shape and a plurality of beads 22A (see FIG. 1). A pair of clamping parts 24X and 24Y are formed in the both sides of the main-body part 22 in this embodiment. The pair of sandwiching portions 24X and 24Y sandwich and cover the coupling end portion 16 of the first member 12 in a state of being in close contact from both sides in the plate thickness direction. In FIG. 1, the side end surface (thickness portion) of the coupling end portion 16 of the first member 12 is exposed, but this portion may be covered with a part of the second member 20. .

  As shown in FIG. 2, each of the pair of sandwiching portions 24X and 24Y includes projecting portions 24A and 24B along the projecting portions 16A of the first member 12, and has a substantially uniform thickness over the entire area. Is set. Furthermore, the thickness of both the pair of sandwiching portions 24X and 24Y is set to be equal. In addition, in FIG. 2, the thickness of the tip side of the protruding portion 24A in the upper holding portion 24X of the pair of holding portions 24X and 24Y is t1, and the top portion of the protruding portion 24A in the upper holding portion 24X. The wall thickness at 24A1 is t2, and the wall thickness at the base end side of the protruding portion 24A is t3 at the upper clamping part 24X. Further, of the pair of sandwiching portions 24X and 24Y, the thickness at the tip side of the projecting portion 24B in the lower sandwiching portion 24Y is t4, and the thickness at the top portion 24B1 of the projecting portion 24B in the lower sandwiching portion 24Y. The thickness is set to t5, and the thickness on the base end side with respect to the protruding portion 24B in the lower clamping portion 24Y is set to t6. In this embodiment, the relationship of t1≈t2≈t3≈t4≈t5≈t6 is established.

  Here, the manufacturing method of the coupling structure 10 will be outlined. The joint structure 10 is manufactured by insert-molding a metal first member 12 into a second member 20 made of fiber reinforced resin. In the manufacturing method of the coupling structure 10, first, the first member 12 that is an insert part is placed in a cavity of a mold (not shown). Next, a fiber reinforced resin material, which is a material for forming the second member 20 in the cavity, is injected and filled and cured. Instead of injection filling and curing the fiber reinforced resin material, a fiber reinforced resin material such as a sheet molding compound (SMC) or a thermoplastic stampable sheet may be stamped. By the above, the 1st member 12 and the 2nd member 20 are integrated, and the coupling structure 10 is manufactured. In addition, the area | region which forms a pair of clamping parts 24X and 24Y in the said metal mold | die is a shape that each of a pair of clamping parts 24X and 24Y becomes substantially equal thickness over the whole area, and a pair of clamping parts 24X , 24Y are formed to have the same thickness.

(Action / Effect)
Next, the operation and effect of the above embodiment will be described.

  In the present embodiment, in addition to the pair of sandwiching portions 24X and 24Y of the second member 20 sandwiching (bonding) the coupling end portion 16 of the first member 12, the pair of sandwiching portions 24X and 24Y. The protrusions 24A and 24B are formed along the protrusion 16A of the coupling end 16. For this reason, since the coupling end portion 16 of the first member 12 and the pair of sandwiching portions 24X and 24Y of the second member 20 are mechanically coupled, the first structure 12 can be compared with the comparison structure without mechanical coupling. The member 12 and the second member 20 are firmly coupled.

  Here, it demonstrates further, comparing with another contrast structure. Another contrasting structure is a structure in which a hole is formed through a coupling end of a metal insert member and the coupling end is embedded in a fiber reinforced resin member by insert molding. In the contrast structure, if the resin materials flowing from both sides of the hole collide with each other at the time of insert molding, the resin materials may not be completely mixed and may be cured while leaving the boundary (weld line). The joint interface tends to be fragile. On the other hand, in this embodiment, since the hole for making a resin material flow in into the metal 1st member 12 is not formed, the boundary (weld line) like the said contrast structure is not formed.

  In addition, for example, a sheet molding compound (SMC) or a thermoplastic stampable sheet includes fibers having a length of 10 mm to 20 mm. If the diameter of the hole of the contrast structure is smaller than about 10 mm, the inside of the hole The fiber cannot be sufficiently entangled. On the other hand, in this embodiment, since it is not the structure in which the hole for making a fiber reinforced resin material flow in into the metal 1st member 12 was formed, there is no such disadvantage.

  Further, in the contrast structure, as the fiber reinforced resin material flows into the hole at the time of insert molding, the fibers arranged on both sides of the thickness direction with respect to the insert member meander, so that the fibers are linear. It is disadvantageous in terms of strength compared to the case where it is arranged. On the other hand, in the present embodiment, the pair of sandwiching portions 24X and 24Y are set to have the same thickness so that each of the pair of sandwiching portions 24X and 24Y has a substantially uniform thickness over the entire region. Therefore, the flow of the fiber reinforced resin material is smooth at the time of manufacture, and there is basically no disturbance such as meandering of the fiber. Further, in the contrast structure, since the resin material flows from both sides of the hole during manufacturing, so-called voids (bubbles) are easily formed. In the present embodiment, the resin material is allowed to flow into the metal first member 12. Since the holes are not formed and the thickness of the resin material is set to be substantially uniform, the formation of voids is suppressed.

  Furthermore, in the contrast structure, a process of penetrating a hole in the coupling end of the metal insert member is required at the time of manufacture. On the other hand, in this embodiment, since the process of forming a hole in the coupling end portion 16 of the first metal member 12 is not required, the cost can be reduced.

  In the present embodiment, since the protrusion 16A is formed in a hollow truncated cone shape, the bonding strength between the first member 12 and the second member 20 is ensured with respect to loads in various directions in plan view. be able to.

  As described above, according to the present embodiment, the bonding strength between the first member 12 and the second member 20 can be improved.

[Second Embodiment]
Next, a member coupling structure according to the second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a perspective view of the member coupling structure according to the present embodiment. As shown in this figure, the coupling structure 30 to which the member coupling structure is applied is a structure in which the first member 32 and the second member 40 are coupled. In the coupling structure 30 according to the present embodiment, the first member 32 is provided not at the periphery of the second member 40 but at the opening 46 of the second member 40, so that the coupling structure 10 according to the first embodiment. (See FIG. 1). In addition, the coupling structure 30 is manufactured by insert-molding the metal first member 32 into the second member 40 made of fiber reinforced resin in substantially the same manner as the coupling structure 10 in the first embodiment. The

  The first member 32 is a metal plate-like member and includes a main body portion 34 and a coupling end portion 36 that constitutes an outer peripheral end portion of the main body portion 34. A hole 34 </ b> A is formed through the center of the main body 34 of the first member 32. This hole 34A is used for insertion of a bolt (not shown) as an example. In addition, a protrusion-shaped protrusion 36 </ b> A that bulges in the thickness direction of the first member 32 is formed on the coupling end 36 of the first member 32. The protruding portion 36A is formed in a hollow truncated cone shape like the protruding portion 16A (see FIG. 2) of the first embodiment, and the top portion 36T is circular in plan view.

  The second member 40 is made of the same material as that of the second member 20 (see FIG. 1) of the first embodiment (that is, made of fiber reinforced resin), and is a plate-like member (panel component). A rectangular opening 46 is formed through the second member 40 in a central region in plan view. The second member 40 includes a flat main body 42 and a pair of clamping portions 44 provided on the opening 46 side. In addition, in FIG. 3, illustration of the clamping part arrange | positioned under the connection edge part 36 of the 1st member 32 is abbreviate | omitted. The pair of sandwiching portions 44 is formed in a region having a predetermined width from the opening 46 in plan view, and covers and covers the coupling end portion 36 of the first member 32 in a state of being in close contact from both sides in the plate thickness direction. . Here, an enlarged cross section taken along line 3L-3L in FIG. 3 is omitted, but is substantially the same as the cross section shown in FIG. That is, the arrangement relationship between the coupling end portion 36 of the first member 32 shown in FIG. 3 and the pair of clamping portions 44 of the second member 40 is the first in the first embodiment shown in FIGS. 1 and 2. The arrangement relationship between the coupling end portion 16 of the member 12 and the pair of clamping portions 24X and 24Y of the second member 20 is substantially the same.

  Each of the pair of sandwiching portions 44 shown in FIG. 3 (only the upper sandwiching portion is shown in the drawing) includes a projecting portion 44A along the projecting portion 36A of the first member 32. In FIG. 3, the illustration of the protruding portion on the lower side (back side) of the protruding portion 36 </ b> A is omitted. Moreover, each of a pair of clamping part 44 is set to the substantially uniform thickness over the whole area similarly to the clamping parts 24X and 24Y (refer FIG. 2) of 1st Embodiment. Furthermore, the thickness of both of the pair of sandwiching portions 44 is set to be equal.

  Also by the configuration of the present embodiment, substantially the same operations and effects as those of the first embodiment described above can be obtained.

[Modification]
In the embodiment shown in FIGS. 1 to 3, the protrusions 16A, 36A and the protrusions 24A, 24B, 44A are formed with tapered side walls, but the shapes of the protrusions and protrusions are as follows. For example, other shapes such as those in which the side wall portion is formed in a cylindrical shape may be used. The first member (12, 32) and the second member (20, 40) are formed according to the direction and magnitude of the load assumed to be input to the first member (12, 32) or the second member (20, 40). 12, 32) and the bonding strength between the second member (20, 40) can be optimized.

  4 (A) to 4 (D) are plan views showing modified examples of the protruding portion and the protruding portion. 4A to 4D, the first members corresponding to the first members 12 and 32 (see FIGS. 1 to 3) of the first and second embodiments are denoted by reference numerals 52A and 52B. , 52C, 52D. 4A to 4D, the second members corresponding to the second members 20 and 40 (see FIGS. 1 to 3) of the first and second embodiments are denoted by reference numerals 56A and 56B. , 56C, 56D. Further, in the first members 52A, 52B, 52C, and 52D and the second members 56A, 56B, 56C, and 56D shown in FIGS. 4A to 4D, the configuration excluding the configuration of the protruding portion and the protruding portion. About a part, the code | symbol of the same structure part of the said 1st Embodiment is attached | subjected for convenience, and description is abbreviate | omitted.

  As in the first modification shown in FIG. 4A, the protrusion 54A and the protrusions 58a and 58A may be formed in an oval shape in plan view. In this modification, the protrusion 54A and the protrusions 58a and 58A have an oval shape that is long in the direction orthogonal to the direction in which the first member 52A and the second member 56A are arranged in plan view. This modification is preferably applied when inputs of loads f1 and f2 in a direction in which the first member 52A and the second member 56A are arranged in a plan view are assumed.

  Further, as in the second modified example shown in FIG. 4B, the protrusion 54B and the protrusions 58b and 58B may be formed in a square shape in plan view. In this modification, the protrusion 54B and the protrusions 58b and 58B are formed in a square shape having two sides extending in the direction in which the first member 52B and the second member 56B are arranged in plan view.

  In addition, as in the third modification shown in FIG. 4C, the protrusion 54C and the protrusions 58c and 58C include a semicircular shape in a plan view (including a shape that can be said to be a generally semicircular shape in a broad sense). It may be formed in a substantially semicircular shape. The direction of the semicircular shape in plan view is set according to the direction in which the input of the load is assumed. In FIG. 4C, as an example, the protruding portion 54C and the protruding portions 58c and 58C have straight vertical wall portions in a direction orthogonal to the direction in which the first member 52C and the second member 56C are arranged in plan view. The semicircular arc portion is disposed in the direction opposite to the side where the first member 52C is exposed with respect to the vertical wall portion.

  Further, as in the fourth modified example shown in FIG. 4D, the protrusion 54D and the protrusions 58d and 58D are arranged in the direction in which the first member 52D and the second member 56D are aligned and orthogonal to each other in plan view. You may form in the ellipse shape which makes a diagonal direction with respect to a direction long. This modification is preferably applied when inputs of the loads f3 and f4 in the shear direction in a direction orthogonal to the direction in which the first member 52D and the second member 56D are arranged in plan view are assumed.

  In addition, each side wall part of protrusion part 54A, 54B, 54C, 54D and protrusion part 58a, 58A, 58b, 58B, 58c, 58C, 58d, 58D shown by FIG. Although it is set in a cylindrical shape, it may be set in a tapered shape.

  In addition, the said embodiment and the above-mentioned some modification can be implemented combining suitably.

  Although an example of the present invention has been described above, the present invention is not limited to the above, and it is needless to say that various modifications can be made without departing from the spirit of the present invention. .

12 first member 16 coupling end 16A projection 20 second member 24X clamping unit 24Y clamping unit 24A projection unit 24B projection unit 32 first member 36 coupling end 36A projection unit 40 second member 44 clamping unit 44A Protruding part 52A, 52B, 52C, 52D First member 54A, 54B, 54C, 54D Protruding part 56A, 56B, 56C, 56D Second member 58a, 58A, 58b, 58B, 58c, 58C, 58d, 58D Protruding part

Claims (1)

A metal first member including a coupling end portion that is plate-shaped and has a protruding portion that bulges in the plate thickness direction;
A pair of sandwiching portions are provided for sandwiching the coupling end portions in close contact from both sides in the plate thickness direction, and each of the pair of sandwiching portions includes a projecting portion along the projecting portion and covers the entire area. A second member made of fiber-reinforced resin, which is set to a substantially uniform thickness, and the thicknesses of both of the pair of sandwiching portions are set to be equal,
A connecting structure of members having

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