JP2001132719A - Riveting connection structure, rivet connection device and rivet connection method - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To improve bonding strength. SOLUTION: The rivet main body 10 is a hollow shaft part having a cylindrical shape as a whole, and a plastic deformation suppressing portion 10C is formed at a substantially central portion in the axial direction of the rivet main body 10 in the entire area in the plate thickness direction. Specifically, the rivet body 10 is made of a heat-treatable metal such as iron,
C is less likely to be plastically deformed by heat quenching as a heat treatment, induction quenching, or the like than in the both ends 10D and 10E in the driving direction. That is, in the rivet main body 10, the plastic deformation suppressing portion 10C at the central portion in the axial direction is less likely to be deformed than the both ends 10D and 10E in the driving direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a rivet connection structure, a rivet connection device and a rivet connection method, and more particularly to a rivet connection structure applied to a vehicle body such as an automobile, a rivet connection device and a rivet. Related to the joining method.

[0002]

2. Description of the Related Art Conventionally, an example of a connection structure using rivets applied to a vehicle body such as an automobile is disclosed in WO98 / 31487.

As shown in FIG. 12A, the rivet is a self-drilling pipe-shaped rivet, and the rivet body 100 is cylindrical. FIG.
As shown in (B), both ends 1 of the rivet body 100
00A and 100B are inclined surfaces with respect to the driving direction, and are configured so that the driving load is reduced.

[0004]

However, in this rivet connection structure, the rivet body 100
Have uniform strength characteristics over the entire area. As a result, in order to increase the strength of the rivet body 100 and prevent unnecessary deformation at the time of driving, for example, buckling of the intermediate portion 100C, the vicinity of both ends 100A and 100B is not sufficiently deformed, and the bonding force is reduced. I do. On the other hand, both ends 100
If the strength of the rivet body 100 is reduced in order to sufficiently deform the vicinity of A and 100B and improve the bonding force, buckling or the like occurs in the intermediate portion 100C at the time of driving. As a result, it is difficult to satisfy both the driving performance and the deformation performance of the rivet body 100, and it is difficult to obtain a sufficient bonding force.

In view of the above, it is an object of the present invention to provide a rivet coupling structure, a rivet coupling device, and a rivet coupling method capable of obtaining a sufficient coupling force.

[0006]

According to the first aspect of the present invention, a plastic deformation suppressing portion is provided on a part of the rivet body.

Therefore, the plastic deformation suppressing portion provided on a part of the rivet main body forms a part of the rivet main body that is hardly deformed at the time of driving. It can be divided into sites that are easy to do. As a result, since both the driving performance and the deformation performance of the rivet body can be satisfied,
A sufficient bonding force can be obtained.

According to a second aspect of the present invention, in the connection structure using rivets according to the first aspect, at least one plastic deformation suppressing portion is provided at a substantially central portion in the axial direction of a shaft portion of the rivet body. It is characterized by the following.

Therefore, the substantially central portion in the axial direction of the shaft portion of the rivet main body is a portion that is difficult to be deformed at the time of driving, and both ends in the driving direction of the rivet main body are portions that are easily deformed at the time of driving, and are surely deformed. As a result, since both the driving performance and the deformation performance of the rivet main body can be satisfied, a sufficient bonding force can be obtained.

The present invention described in claim 3 provides the first and second aspects.
In the connection structure by rivets according to any of
The plastic deformation suppressing portion is a portion that has been subjected to a heat treatment.

Therefore, in addition to the contents described in any of the first and second aspects, the plastic deformation suppressing portion can be easily formed by heat treatment.

The present invention described in claim 4 is the first and second aspects of the present invention.
In the connection structure by rivets according to any of
The plastic deformation suppressing portion is a portion formed by combining a material having higher strength than the rivet body.

Therefore, in addition to the contents described in any of the first and second aspects, the material of the plastic deformation suppressing portion can be arbitrarily selected. As a result, it is possible to finely adjust both the driving performance and the deformation performance of the rivet body by selecting the material.

The present invention described in claim 5 provides the invention according to claims 1-4.
In the connection structure by rivets according to any of
The rivet body has a hollow shaft portion.

Therefore, in addition to the contents described in any one of claims 1 to 4, since both ends of the rivet body in the driving direction can change not only outside the shaft portion but also inside the shaft portion at the time of driving, the coupling force is reduced. Further improve.

The present invention according to claim 6 provides the invention according to claims 1 to 5
In the connection structure by rivets according to any of
The rivet main body is driven by a punch having a tip portion that is entirely convex.

Therefore, in addition to the contents described in any one of the first to fifth aspects, the end of the rivet body that comes into contact with the tip of the punch is partially joined by the part of the load when driving the rivet body. Can also be effectively deformed in the surface direction. As a result, the bonding force is further improved.

According to a seventh aspect of the present invention, in the rivet-joining device using a rivet body having a hollow shaft portion, a punch for driving the rivet body includes a load transmitting section for transmitting a driving load to the rivet body. When,
A guide portion for holding the rivet body, wherein the load transmitting portion and the guide portion are relatively movable in a driving direction at the time of driving.

Accordingly, by moving the load transmitting portion and the guide portion relative to each other in the driving direction at the time of driving, it is possible to drive a predetermined portion of the rivet body in a state in which it is difficult to deform, and to perform a predetermined portion of the rivet body. Can be effectively deformed. As a result, since both the driving performance and the deformation performance of the rivet main body can be satisfied, a sufficient bonding force can be obtained.

According to a ninth aspect of the present invention, in the rivet-joining device according to the seventh aspect, the guide portion is configured to be connected to the load transmitting portion after the driving end of the rivet body reaches the material to be joined. Is characterized in that the relative movement speed becomes slower.

Therefore, the positional relationship between the load transmitting portion and the guide portion of the punch is determined until the rivet main body is driven.
The rivet body is held, and the rivet body is driven and moved to a position where the punch-side end of the rivet body does not hinder deformation. As a result, since both the driving performance and the deformation performance of the rivet main body can be satisfied, a sufficient bonding force can be obtained.

According to a ninth aspect of the present invention, in the rivet-joining device according to the seventh aspect, the guide portion is configured to be connected to the load transmitting portion after the driving end of the rivet body reaches the material to be joined. Is characterized in that the relative movement speed increases.

Accordingly, the positional relationship between the rivet main body and the guide portion is such that the rivet main body is held until the rivet main body is driven, and when the rivet main body is driven, pressure is applied to the material to be joined on the inner side of the shaft of the rivet main body by the guide portion. Since it is added, the driving end of the rivet body can be largely deformed outward. As a result, since both the driving performance and the deformation performance of the rivet main body can be satisfied, a sufficient bonding force can be obtained.

According to a tenth aspect of the present invention, in the joining device using a rivet using a rivet main body having a hollow shaft portion, the punch for driving the rivet main body includes a load transmitting portion for transmitting a driving load to the rivet main body. And a guide portion for holding the rivet body,
The die for supporting the material to be joined has a punching hole facing the guide portion.

Therefore, it is possible to drive the predetermined portion of the rivet body in a state where the predetermined portion of the rivet body is hardly deformed by the load transmitting portion and the guide portion at the time of driving, and the predetermined portion of the rivet body is effectively formed by the punch and the die. Can be deformed. As a result, since both the driving performance and the deformation performance of the rivet main body can be satisfied, a sufficient bonding force can be obtained. In addition, the joining of the joined materials by the rivet body and the punching of the joined material inside the shaft portion of the rivet body can be performed in one step.

According to an eleventh aspect of the present invention, there is provided a method of joining with a rivet using a rivet body having a hollow shaft portion, a step of driving the rivet body with a punch, and crushing both axial end portions of the rivet body. The step and the step of punching out the material to be joined inside the shaft portion of the rivet main body are performed by one-time movement of the punch.

Accordingly, the punch makes a reciprocating motion at the time of driving, so that the rivet main body can be driven by the punch and the axially opposite end portions of the rivet main body can be crushed. As a result, since both the driving performance and the deformation performance of the rivet main body can be satisfied, a sufficient bonding force can be obtained. In addition, the workability is improved because the joining of the joining material by the rivet body and the punching of the joining material inside the shaft portion of the rivet body are completed only by making the punch move once when the rivet body is driven.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a rivet connection structure according to the present invention will be described with reference to FIGS.

As shown in FIG. 1A, the rivet of this embodiment is a self-drilling pipe-shaped rivet, and the rivet body 10 is entirely a cylindrical hollow shaft.

As shown in FIG. 1B, both ends 10A and 10B of the rivet main body 10 are flat with respect to the driving direction (the direction of arrow A in the figure). A plastic deformation suppressing portion 10C is provided at a substantially central portion of the rivet body 10 in the axial direction.
Are formed in the entire thickness direction (the direction of arrow B in the figure).
Specifically, the rivet main body 10 is made of a metal such as iron that can be heat-treated, and the plastic deformation suppressing portion 10C is compared with the driving direction both ends 10D and 10E by heat quenching as a heat treatment, induction hardening, or the like. It is difficult to plastically deform. That is, the rivet main body 10 is configured such that the plastic deformation suppressing portion 10C at the axial center portion has both ends 10D in the driving direction,
It is harder to deform than 10E.

Next, the operation of the present embodiment will be described.

In the present embodiment, the plastic deformation suppressing portion 10C provided at the substantially central portion in the axial direction of the rivet body 10 makes the substantially central portion in the axial direction of the rivet body 10 hardly deform at the time of driving, thereby improving the driving performance. At the same time, both ends 10D and 10E in the driving direction of the rivet main body 10 become portions that are easily deformed at the time of driving and are surely deformed (crushed). As a result, since both the driving performance and the deformation performance of the rivet body 10 can be satisfied,
A sufficient bonding force can be obtained. In the present embodiment, the plastic deformation suppressing portion 10C can be easily formed by the heat treatment.

As shown in FIG. 2, in the present embodiment, the rivet main body 10 is made up of plate members 16 and 18 as materials to be joined from a punch 12 having a hemispherical convex end 12A. Is driven into. Therefore, one end 10E of the driven rivet body 10 is
The dies 20 supporting the rivets 6 and 18 easily spread to the outside (lap margin L1) and the inside (lap margin L2) of the rivet body 10 and a part of the load when driving the rivet body 10 (arrow in FIG. 2). F), the other end 1 of the rivet body 10 that comes into contact with the tip 12A of the punch 12
0D is also effectively deformed in the plane direction of the plate 16. As a result, the bonding force can be further improved.

In this embodiment, the rivet body 10
Although the whole was configured as a cylindrical hollow shaft part,
The rivet main body 10 is not limited to this, and may have another configuration such as a configuration in which the shaft portion is solid, a configuration having a head portion having a larger diameter than the shaft portion, or the like.

In this embodiment, the rivet body 10
The plastic deformation suppressing portion 10C is formed in the entire area in the plate thickness direction at the central portion in the axial direction, but instead the plastic deformation suppressing portion 10C is formed on the outer peripheral side in the plate thickness direction as shown in FIG. It may be configured to be formed only in the portion. Further, as shown in FIG. 3B, the plastic deformation suppressing portion 10C may be formed only on the inner peripheral side in the thickness direction. FIG. 3 (C)
As shown in (1), a plurality of plastic deformation suppressing portions 10C may be formed at predetermined intervals in the axial direction.

In the present embodiment, the plastic deformation suppressing portion 1
0C was hardly plastically deformed by heat treatment. Instead, the content of carbon, nitrogen, etc. was adjusted (carburization, nitriding, etc.).
Thereby, the plastic deformation suppressing portion 10 </ b> C may be hardly plastically deformed.

In the present embodiment, the tip 12A of the punch 12 has a hemispherical convex shape over the whole. However, the shape of the tip 12A of the punch 12 is not limited to this.
As shown in the above, another convex shape such as a truncated cone shape may be used.

Next, a second embodiment of the rivet connection structure of the present invention will be described with reference to FIG.

The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 5A, in this embodiment, the rivet body 10 is made of a light alloy such as aluminum or magnesium. At a substantially central portion in the axial direction of the rivet body 10, a plastic deformation suppressing portion 10C is formed in a ring shape on the outer peripheral side.

Specifically, as shown in FIG.
At a substantially central portion in the axial direction of the rivet main body 10, a ring-shaped concave portion 22 is formed on an outer peripheral portion.
A metal ring 24 made of another light alloy or iron, which is higher in strength (Young's modulus, yield strength, hardness, etc.) than the light alloy constituting the rivet body 10 and is not easily plastically deformed, is provided.

As shown in FIG. 5C, the metal ring 2
4 has a C-shaped cross section and is wound around the concave portion 22.

Accordingly, in this embodiment, as in the first embodiment, both the driving performance and the deformation performance of the rivet main body 10 can be satisfied, so that a sufficient coupling force can be obtained. Further, since the material of the plastic deformation suppressing portion 10C can be arbitrarily selected, fine adjustment of both the driving performance and the deformation performance of the rivet main body 10 can be performed by selecting the material.

In this embodiment, as shown in FIG. 5C, the metal ring 24 has a C-shaped cross section and
Alternatively, as shown in FIG. 5D, the metal ring 24 may be formed into two members having a semicircular cross section, and these two members may be wound around the recess 22.

In the first and second embodiments, both ends 10A, 10B of the rivet body 10 are respectively provided.
Is flat with respect to the driving direction, but instead, as shown in FIG. 6A, both ends 10A and 10B of the rivet main body 10 are sharply inclined from the outer peripheral edge to the inner peripheral edge. And may be formed in an inward tapered shape in which the outer peripheral edge portion is sharp. Further, as shown in FIG. 6B, both ends 10A and 10B of the rivet main body 10 have an acute inclination from the inner peripheral edge to the outer peripheral edge, and an outward tapered shape in which the inner peripheral edge is sharp. May be formed. FIG. 6 (C)
As shown in FIG.
The cross-sectional shape along the driving direction at 0B may be a mountain shape that is sharp in the driving direction.

Next, a first embodiment of the rivet connecting device of the present invention will be described with reference to FIG.

As shown in FIG. 7 (A), in this embodiment, the punch 32 for driving the rivet main body 30 having a cylindrical hollow shaft portion as a whole is a cylinder for transmitting a driving load to the rivet main body 30. And a cylindrical guide portion 36 disposed inside the load transmitting portion 34 and holding the rivet body 30. The distal end portion 32A of the punch 32 extends over the entirety. And a hemispherical convex shape. Further, at the time of driving, the load transmitting portion 34 is relatively movable in the driving direction (the direction of the arrow C in the drawing) and the opposite direction with respect to the guide portion 36. Specifically, when the rivet body 30 is driven, for example, after the driving-side tip 30B of the rivet body 30 reaches the plate 16, the relative movement speed of the guide portion 36 with respect to the load transmitting portion 34 becomes slow. I have.

Next, the operation of the present embodiment will be described.

In the present embodiment, the positional relationship between the load transmitting portion 34 and the guide portion 36 of the punch 32 is such that the guide portion 36 is at a predetermined distance from the load transmitting portion 34 until the rivet body 30 contacts the plate 16. The rivet body 30 is retracted, and is in a positional relationship in which the rivet main body 30 can be held on the outer peripheral portion of the guide portion 36. Further, after the rivet body 30 is driven into the plate 16, the relative movement speed of the guide portion 36 with respect to the load transmitting portion 34 is reduced, so that the guide portion 36 is driven in the driving direction (arrow C in the drawing) with respect to the load transmitting portion 34. ), And is at a position where it does not hinder the inward deformation of the rivet body 30 at the punch-side end 30 </ b> A of the rivet body 30.

As a result, during driving, as shown in FIG.
Of the rivet body 30 can be prevented.
Is improved, and as shown in FIG.
When the driving is completed, both ends 30A of the rivet main body 30,
Since 30B is surely deformed, the deformation performance can be satisfied. Therefore, a sufficient bonding force can be obtained.

In this embodiment, the rivet body 30 is used.
After the driving-side tip 30B of the rivet main body 30 reaches the plate 16, the relative movement speed of the guide portion 36 with respect to the load transmitting portion 34 decreases, but instead, the driving-side end 30B of the rivet body 30 reaches the plate 16. Thereafter, the relative moving speed of the guide portion 36 with respect to the load transmitting portion 34 may be increased. In this case, the rivet main body 30 can be held on the outer peripheral portion of the guide portion 36 until the rivet main body 30 contacts the plate 16. Further, after the rivet body 30 is driven into the plate 16, the guide portion 36 with respect to the load transmitting portion 34.
In order to increase the relative movement speed of the guide member 36, the guide portion 36 is driven in the driving direction (the direction of arrow C in the figure) with respect to the load transmitting portion 34.
Relative to the plate material 1 on the inner side of the rivet body 30.
By applying pressure to 6, 6 and 18, the driving-side tip 30B of the rivet body 30 can be largely deformed to the outside of the shaft. As a result, since both the driving performance and the deformation performance of the rivet main body 30 can be satisfied, a sufficient bonding force can be obtained.

In the present embodiment, the tip 32A of the punch 32 has a hemispherical convex shape over the entirety. However, the shape of the tip 32A of the punch 32 is not limited to this, but is shown in FIG.
As shown in FIG. 8A and FIG. 8B, another convex shape such as a truncated cone shape may be used.

Next, a second embodiment of the rivet-joining device of the present invention will be described with reference to FIG.

As shown in FIG. 9A, in the present embodiment, the punch 42 for driving the rivet body 30 having a hollow cylindrical portion as a whole is a cylinder for transmitting a driving load to the rivet body 30. Load transmitting portion 44 and inner guide portions 46 disposed inside and outside of the load transmitting portion 44 to hold the rivet body 30 before driving.
And an outer guide portion 48. The inner guide portion 46 has a columnar shape, the outer guide portion 48 has a cylindrical shape, and the distal end portion 42A of the punch 42 has a convex shape throughout. Further, at the time of driving, the load transmitting portion 44 can be relatively moved in the driving direction (the direction of arrow C in the drawing) with respect to the inner guide portion 46 and the outer guide portion 48. Specifically, when driving the rivet body 30, the load transmitting portion 44 is in a state of being retracted with respect to the inner guide portion 46 and the outer guide portion 48 (the state shown in FIG. 9A). The rivet main body 30 is inserted between the inner guide portion 46 and the outer guide portion 48 while being driven. At this time, only the load transmitting portion 44 drives the rivet body 30.

Further, the inner guide portion 46 and the outer guide portion 4
8 reaches the upper plate 16, the load transmitting portion 44 moves relative to the inner guide portion 46 and the outer guide portion 48 in the driving direction (the direction of arrow C in the figure), and the rivet main body 30.
Is deformed to the outside of the shaft portion and the inside of the shaft portion, and the load transmitting portion 44, the inside guide portion 46, and the outside guide portion 48 have the same margin (the position shown in FIG. 9B). It is designed to stop.

Next, the operation of the present embodiment will be described.

In the present embodiment, the positional relationship between the load transmitting portion 44, the inner guide portion 46, and the outer guide portion 48 in the punch 42 is determined until the inner guide portion 46 and the outer guide portion 48 reach the upper plate member 16. The rivet body 30 can be held between the inner guide portion 46 and the outer guide portion 48. When the inner guide portion 46 and the outer guide portion 48 reach the upper plate 16, the load transmitting portion 44 moves the inner guide portion 46 and the outer guide portion 48 against each other.
The upper portion 30A of the rivet main body 30 is relatively moved in the driving direction to deform the upper end portion 30A of the rivet body 30 to the outside of the shaft portion and the inside of the shaft portion. 9 (B)).

As a result, as shown in FIG. 9A, during driving, the inner guide portion 46 and the outer guide portion 48
Thus, deformation of the rivet body 30 at the substantially central portion in the axial direction can be prevented, the driving performance of the rivet body 30 is improved, and as shown in FIG. 9B, when the driving is completed, both ends 30A, 30B of the rivet body 30 are completed. Is reliably deformed, so that the deformation performance can be satisfied. Therefore, a sufficient bonding force can be obtained.

In the present embodiment, the tip 42A of the punch 42 has a truncated cone-shaped convex shape over the entirety. However, the shape of the tip 42A of the punch 42 is not limited to this, and is not limited to this. Other convex shapes may be used.

Next, a third embodiment of the rivet joining device of the present invention will be described with reference to FIG.

As shown in FIG. 10A, in this embodiment, the punch 52 for driving the rivet body 30 having a cylindrical hollow shaft portion as a whole is of a penetrating type, and the tip portion is a rivet. Guide part 52 holding main body 30
A. Further, the shaft diameter R1 of the guide portion 52A is
It is smaller than the shaft diameter R2 of the load transmitting portion (body portion) 52B (R1 <R2). Further, the shaft diameter R2 of the load transmitting portion 52B is substantially equal to the outer diameter R3 of the rivet body 30 (R2 ≒ R3), and the shaft diameter R1 of the guide portion 52A is fitted to the inner peripheral portion of the rivet body 30. Rivet body 30
It is set to a size that can support.

On the other hand, the dies 5 for supporting the plate members 16 and 18
4, a punching hole 56 facing the guide portion 52A of the punch 52 is formed. The punching of the rivet main body 30, the plate material 16 inside the shaft portion of the rivet main body 30,
The punching of 18 can be performed only by the movement of the punch 52 in the driving direction (the direction of arrow C in the figure), that is, by a one-time motion.

Next, a method of joining with rivets in this embodiment will be described.

In this embodiment, FIGS. 10A and 10
As shown in (B), the rivet body 30 is
The steps of driving the punches 52 into the plate members 16 and 18, crushing the front end portions 30 </ b> A and 30 </ b> B of the rivet body 30, and punching the plate materials 16 and 18 inside the shaft portion of the rivet body 30 are performed in the driving direction of the punch 52 (FIG. (In the direction of arrow C).

Next, the operation of the present embodiment will be described.

In the present embodiment, since the inner peripheral portion of the rivet main body 30 is supported by the guide portion 52A of the punch 52, it is possible to drive the rivet main body 30 in the axially central portion in a state where it is difficult to deform. Become. Further, as shown in FIG. 10B, both ends 30A and 30B of the rivet main body 30 can be effectively crushed by the punch 52 and the hole 56 for punching and the die 54. As a result, since both the driving performance and the deformation performance of the rivet body 30 can be satisfied,
A sufficient bonding force can be obtained.

In the present embodiment, the rivet body 30
Between the plate member 16 and the plate member 18 and the rivet body 3
Since the punching of the plate members 16 and 18 inside the 0 shaft portion can be performed in one step, workability is improved.

Next, a fourth embodiment of the rivet-joining device of the present invention will be described with reference to FIG.

As shown in FIG. 11 (A), in this embodiment, the punch 62 for driving the rivet body 30 having a hollow cylindrical shaft portion as a whole is of a penetrating type. The portion is an inner guide portion 62A that holds the rivet body 30. Further, the shaft diameter R1 of the inner guide portion 62A is smaller than the shaft diameter R2 of the load transmitting portion (main body portion) 62B (R1 <R2). Further, the shaft diameter R2 of the load transmitting portion 62B is equal to the outer diameter R3 of the rivet body 30 (R2 = R3).

The load transmitting portion 62 of the punch 62
The outer guide portion 62C has an outer guide portion 62C on its outer peripheral portion.
The rivet main body 30 is supported between the inner guide portion 62A and the outer guide portion 62C so that the rivet main body 30 can be supported relative to the driving direction (arrow C direction in the drawing) with respect to 2B. .

On the other hand, the dies 5 for supporting the plate members 16 and 18
4, a punching hole 56 facing the inner guide portion 62A of the punch 62 is provided.
0 and the plate 1 inside the shaft of the rivet body 30
The punching of the punches 6 and 18 can be performed only by the movement in the punching direction of the punch 62 (the direction of arrow C in the drawing), that is, the one-time motion.

Next, a method of joining with rivets according to the present embodiment will be described.

In this embodiment, FIG. 11 (A) and FIG.
As shown in (B), the rivet body 30 is
The step of driving the punches 62 into the plate members 16 and 18, the step of crushing both end portions 30 </ b> A and 30 </ b> B of the rivet body 30, and the step of punching the plate materials 16 and 18 inside the shaft portion of the rivet body 30 are performed in the driving direction of the punch 62 (FIG. (In the direction of arrow C).

Next, the operation of the present embodiment will be described.

In the present embodiment, since the rivet main body 30 is supported by the inner guide portion 62A and the outer guide portion 62C of the punch 62, the rivet main body 30 is driven in a state in which it is hard to be deformed at the time of driving. Becomes possible. Further, as shown in FIG. 11B, both ends 30A, 30 of the rivet main body 30 are formed by punches 62, punching holes 56, and dies 54, as shown in FIG.
B can be effectively crushed. As a result, since both the driving performance and the deformation performance of the rivet main body 30 can be satisfied, a sufficient bonding force can be obtained.

In the present embodiment, the rivet body 30
Between the plate member 16 and the plate member 18 and the rivet body 3
Since the punching of the plate members 16 and 18 inside the 0 shaft portion can be performed in one step, workability is improved.

In the above, the present invention has been described in detail with respect to a specific embodiment. However, the present invention is not limited to such an embodiment, and various other embodiments are included in the scope of the present invention. It is clear to a person skilled in the art that is possible. For example, the present invention is also applicable to a case where three or more plate members are combined.

[0078]

According to the first aspect of the present invention, since the plastic deformation suppressing portion is provided in a part of the rivet body, it has an excellent effect that a sufficient coupling force can be obtained.

According to a second aspect of the present invention, in the rivet connecting structure according to the first aspect, at least one plastic deformation suppressing portion is provided at a substantially central portion of the rivet body in the axial direction of the shaft portion. It has an excellent effect that a good bonding force can be obtained.

The present invention according to claim 3 provides the first and second aspects.
In the connection structure by rivets according to any of
Since the plastic deformation suppression part is a part that has been subjected to heat treatment,
In addition to the effects described in any one of claims 1 and 2, there is an excellent effect that the plastic deformation suppressing portion can be easily formed.

The present invention described in claim 4 provides the first and second aspects of the present invention.
In the connection structure by rivets according to any of
Since the plastic deformation suppressing portion is a portion formed by combining a material having higher strength than the rivet main body, in addition to the effect according to any one of claims 1 and 2, both the driving performance and the deformation performance of the rivet main body are provided. This has the effect of enabling fine adjustment of.

The present invention described in claim 5 provides the invention according to claims 1-4.
In the connection structure by rivets according to any of
Since the rivet main body has a hollow shaft portion, in addition to the effect according to any one of claims 1 to 4, both ends in the driving direction of the rivet main body can change not only outside the shaft portion but also inside the shaft portion when driving. Therefore, there is an effect that the bonding force is further improved.

The present invention according to claim 6 provides the invention according to claims 1 to 5
In the connection structure by rivets according to any of
Since the rivet main body is driven by a punch having a tip portion that is entirely convex, the rivet body has an effect of further improving the bonding force in addition to the effect according to any one of the first to fifth aspects.

According to a seventh aspect of the present invention, there is provided a coupling device using a rivet using a rivet body having a hollow shaft portion, wherein the punch for driving the rivet body includes a load transmitting portion for transmitting a driving load to the rivet body; A guide portion for holding the rivet body, and since the load transmitting portion and the guide portion are relatively movable in the driving direction at the time of driving, there is an excellent effect that a sufficient coupling force can be obtained.

According to an eighth aspect of the present invention, in the rivet-joining device according to the seventh aspect, the guide portion is provided on the load transmitting portion after the driving end of the rivet body reaches the material to be joined. Since the relative movement speed is reduced, both ends of the rivet main body are surely deformed, which has an excellent effect that a sufficient coupling force can be obtained.

According to a ninth aspect of the present invention, in the rivet-joining device according to the seventh aspect, the guide portion is provided on the load transmitting portion after the leading end of the rivet body reaches the material to be joined. Since the load is applied to the materials to be joined by increasing the relative movement speed, there is an excellent effect that a sufficient joining force can be obtained.

According to a tenth aspect of the present invention, in a rivet-joining device using a rivet body having a hollow shaft portion, a punch for driving the rivet body includes a load transmitting portion for transmitting a driving load to the rivet body, A guide for holding the rivet body, and a die for supporting the material to be joined is provided with a punching hole facing the guide, so that a sufficient bonding force can be obtained, and It has an excellent effect that the joining of the joining material and the punching of the joining material inside the shaft portion of the rivet main body can be performed in one step.

According to an eleventh aspect of the present invention, there is provided a method for joining with a rivet using a rivet body having a hollow shaft portion, wherein a step of driving the rivet body with a punch, and a step of crushing both axial end portions of the rivet body. The punching of the material to be joined inside the shaft of the rivet body is performed by the punching motion, so that a sufficient joining force can be obtained, the joining of the material to be joined by the rivet body, and the shaft of the rivet body. There is an excellent effect that punching of the inner joined material can be performed in one step.

[Brief description of the drawings]

FIG. 1A is a perspective view showing a rivet body in a rivet connection structure according to a first embodiment of the present invention, and FIG. 1B is a rivet in a rivet connection structure according to the first embodiment of the present invention; It is a sectional side view which shows a main body.

FIG. 2 is a side sectional view showing a state at the time of rivet driving in the rivet-joined structure according to the first embodiment of the present invention.

FIG. 3A is a side sectional view showing a rivet main body in a rivet coupling structure according to a modification of the first embodiment of the present invention, and FIG. 3B is another modification of the first embodiment of the present invention. It is a sectional side view which shows the rivet main body in the connection structure by the rivet which concerns on an example, (C) is a side sectional view which shows the rivet body in the connection structure by the rivet which concerns on the other modification of 1st Embodiment of this invention. .

FIG. 4 is a side cross-sectional view showing a state at the time of rivet driving in a rivet coupling structure according to a modification of the first embodiment of the present invention.

FIG. 5A is a perspective view showing a rivet body in a rivet connection structure according to a second embodiment of the present invention, and FIG. 5B is a rivet in a rivet connection structure according to the second embodiment of the present invention; It is sectional drawing which shows the main body, (C) is sectional drawing which shows the axial direction center part of the rivet main body in the connection structure by the rivet which concerns on 2nd Embodiment of this invention, (D) is 2nd of this invention. It is sectional drawing which shows the axial direction center part of the rivet main body in the connection structure by the rivet which concerns on the modification of embodiment.

FIG. 6A is a side sectional view showing a rivet body in a rivet coupling structure according to another embodiment of the present invention, and FIG. 6B is a rivet coupling structure according to another embodiment of the present invention. It is side sectional drawing which shows a rivet main body, (C) is a side sectional view which shows the rivet main body in the connection structure by the rivet which concerns on other embodiment of this invention.

FIG. 7A is a side sectional view showing an initial state of rivet driving in the rivet connection device according to the first embodiment of the present invention, and FIG. 7B is a rivet connection according to the first embodiment of the present invention; FIG. 4 is a side sectional view showing a rivet driving completed state in the apparatus.

FIG. 8A is a side sectional view showing an initial state of rivet driving in a rivet coupling device according to a modification of the first embodiment of the present invention, and FIG. 8B is a modification of the first embodiment of the present invention. It is a sectional side view which shows the completion state of rivet driving in the coupling device by the rivet concerning an example.

FIG. 9A is a side sectional view showing an initial state of rivet driving in a rivet joining device according to a second embodiment of the present invention, and FIG. 9B is a rivet joining according to the second embodiment of the present invention. FIG. 4 is a side sectional view showing a rivet driving completed state in the apparatus.

FIG. 10A is a side sectional view showing an initial state of rivet driving in a rivet joining device according to a third embodiment of the present invention and a rivet joining method according to an embodiment of the present invention, and FIG. FIG. 8 is a side sectional view showing a rivet joining device according to a third embodiment of the present invention and a rivet driving completed state in the rivet joining method according to one embodiment of the present invention.

11A is a side sectional view showing an initial state of rivet driving in a rivet joining device according to a fourth embodiment of the present invention and a rivet joining method according to an embodiment of the present invention, and FIG. FIG. 11 is a side sectional view showing a rivet joining device according to a fourth embodiment of the present invention and a rivet driving completed state in the rivet joining method according to one embodiment of the present invention.

FIG. 12A is a perspective view showing a rivet body in a conventional example, and FIG. 12B is a side sectional view showing a rivet body in a conventional example.

[Explanation of symbols]

 Reference Signs List 10 rivet body 10C plastic deformation suppressing part of rivet body 10D driving direction end of rivet body 10E driving direction end of rivet body 22 recess 24 metal ring 30 rivet body 32 punch 34 load transmitting part 36 guide part 42 punch 44 load transmitting part 46 Inner guide part 48 Outer guide part 52 Punch 52A Punch guide part 52B Punch load transmitting part 54 Dice 56 Punching hole part 62 Punch 62A Punch inner guide part 62B Punch load transmitting part 62C Punch outer guide part

Claims (11)

[Claims] 1. A rivet coupling structure, wherein a plastic deformation suppressing portion is provided in a part of a rivet body. 2. The rivet coupling structure according to claim 1, wherein at least one plastic deformation suppressing portion is provided at a substantially central portion of the rivet body in the axial direction of the shaft portion. 3. The joint structure according to claim 1, wherein the plastic deformation suppressing portion is a portion that has been subjected to a heat treatment. 4. The structure according to claim 1, wherein the plastic deformation suppressing portion is a portion formed by combining a material having a higher strength than the rivet body. 5. The rivet connection structure according to claim 1, wherein the rivet body has a hollow shaft portion. 6. The rivet coupling structure according to claim 1, wherein the rivet main body is driven by a punch having a tip portion that is entirely convex. 7. A rivet-joining device using a rivet body having a hollow shaft portion, wherein a punch for driving the rivet body holds a load transmitting portion for transmitting a driving load to the rivet body and the rivet body. And a guide portion, wherein the load transmitting portion and the guide portion are relatively movable in a driving direction during driving. 8. The guide unit according to claim 7, wherein a relative movement speed of the guide unit relative to the load transmitting unit is reduced after the driving end of the rivet body reaches the material to be joined. Riveting device. 9. The guide unit according to claim 7, wherein a relative movement speed of the guide portion with respect to the load transmitting portion increases after a driving end of the rivet body reaches the material to be joined. Riveting device. 10. A coupling device using a rivet using a rivet main body having a hollow shaft portion, wherein a punch for driving the rivet main body holds a load transmitting portion for transmitting a driving load to the rivet main body and the rivet main body. A die for supporting a material to be bonded, the die having a guide portion, and a punching hole facing the guide portion. 11. A method for joining with a rivet using a rivet body having a hollow shaft portion, wherein a step of driving the rivet body with a punch, a step of crushing both axial end portions of the rivet body, A step of punching out a material to be bonded inside the part by a one-time motion of the punch.