JPH0791420A - Rivet and tool for rivet construction - Google Patents

Abstract

PURPOSE:To improve workability at a low cost by providing a hollow shaft section which is inserted into a plural number of overlapped members to be connected, a head which is at an end on the shaft section opening side and whose diameter is larger than that of the shaft section, and a projection piece which is pushed in the shaft section from the head section side to form a projection section for caulking on an outer face of the shaft section. CONSTITUTION:A rivet main body 1 is made of metal in which a head 3 like flange is provided integrally at one end of an opening side of a cylindrical shaft section having a bottom. To connect a plural number of overlapped members to be connected 9, a hole 90 which goes through them is drilled, and the shaft section 2 is inserted into the hole 90 to bring the head 3 into contact with a surface of the member to be connected 9. Then, when a projection piece 4 is hit into an inner part in the shaft section 2 from an opening on the head 3 side by a tool, the projection piece 4 expands the shaft section 2 due to plastic deformation when it passes through a section of a projection section 20 and forms a projection section 22 for caulking which holds the member to be connected 9 between the head 3 and it on an outer face of the shaft section 2. The projection piece 4 reamins in the shaft section 2 after this to reinforce the rivet main body 1. As a consequence, it is possible to realize a low cost and excellent workability owing to this constitution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rivet used for connecting a plurality of superposed members to be connected and a tool for constructing the rivet.

[0002]

2. Description of the Related Art Various rivets have been used in the past, but there is a rivet shown in FIG. 15 as a rivet that can be easily caulked. This is a rivet body 1 in which a flange-shaped head portion 3 is formed at one end of a cylindrical shaft portion 2,
The rivet body 1 is inserted from one end of the rivet body 1 from the other end side of the shaft portion 2. The rivet body 1 is inserted from one of the connected members 9, 9 that are overlapped and the shaft 8 is inserted from the other side into the rivet body 1. The tip of the shaft 8 is pulled by the tool 5 to break the shaft 8 at the neck portion 81 having a small diameter formed in the middle thereof, and the head 80 of the shaft 8 causes the other parts of the rivet body 1 to be broken. Crimping is performed by plastically deforming the end side.

[0003]

In this case, it is necessary to form a neck portion 81 on the shaft 8 and it is necessary to provide the shaft 8 with a portion which is eventually unnecessary. However, it is uneconomical in terms of cost, and the workability is poor because the rivet body 1 and the shaft 8 must be inserted from different directions.

The present invention has been made in view of the above points, and an object of the present invention is to provide a rivet which is low in cost and excellent in workability, and the rivet can be easily installed. A tool for rivet construction is provided.

[0005]

SUMMARY OF THE INVENTION The rivet according to the present invention, however, has a hollow shaft portion that is inserted into a plurality of superposed members to be connected, and a larger diameter than the shaft portion and an opening side of the shaft portion. It is characterized in that it comprises a head provided at the end of the shaft and a protrusion that is pushed into the shaft from the head side to form a caulking protrusion on the outer surface of the shaft by plastic deformation. Further, the rivet construction tool according to the present invention is provided with a rod for pushing in the protrusion, and a driving unit for impacting the rod, or a male screw for forming a female screw on the inner surface of the shaft portion of the rivet is provided on the outer surface. The driving part for rotating the rod, or the driving part for driving the rod having a male screw threaded on the inner surface of the rivet shaft inner surface to rotate the rod, or the head of the rivet equipped with a drill blade. of It is characterized in that it is provided with a drive unit that rotates a rotary shaft that has a connecting engagement portion that engages with a connection portion and that pushes out a rod, and is also connected to an engagement portion for axially connecting a rivet head. It is characterized in that it is provided with the engaging means.

[0006]

According to the present invention, the caulking is performed only by pushing the protrusion from the side where the rivet is inserted into the material to be connected.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the illustrated embodiments. A rivet according to the present invention is composed of a rivet body 1 and a protrusion 4 as shown in FIG. Rivet body 1
Is a metal member formed by integrally forming a flange-shaped head portion 3 at one end on the opening side of the shaft portion 2 formed in a bottomed cylindrical shape, and is formed on the inner surface of the shaft portion 2. Has an annular protrusion 20 at an appropriate position in its axial direction. Stud 4
Is made of, for example, a steel ball, the outer diameter of which is smaller than the inner diameter of the shaft portion 2 and larger than the outer diameter of the protruding portion 20, and the portion of the shaft portion 2 closer to the opening side than the protruding portion 20. It is stored in. The diameter of the opening edge 30 of the opening on the head 3 side is slightly reduced so that the protrusion 4 does not fall out. The material of the rivet body 1 is preferably aluminum, stainless steel, iron, brass or the like, and the length of the hollow shaft portion 2 is designed according to the thickness of the material to be connected 9 and the diameter of the protrusion 4.

In order to connect a plurality of connected members 9, 9 which are stacked by using this rivet, a hole 90 penetrating the connected members 9, 9 is formed, and the shaft portion 2 of the rivet body 1 is formed in this hole. 90, and the head 3 is brought into contact with the surface of the material 9 to be connected. After that, using a tool such as a punch and a hammer, if the protrusion 4 is tapped into the inner portion of the shaft portion 2 from the opening on the side of the head portion 3, the protrusion 4 is moved to the above-mentioned position as shown in FIG. Protrusion 20
When the shaft portion 2 is passed through, the shaft portion 2 is inflated by plastic deformation so that the members 9 to be connected are pinched between the head portion 3 and the caulking protrusion portion 22 is formed on the outer surface of the shaft portion 2. Incidentally, the protrusion 4 remains in the shaft portion 2 even after this, and reinforces the rivet body 1.

In the rivet shown in FIG. 3, a self-drilling type drill blade 25 is attached to the tip of the shaft portion 2 of the rivet body 1, and the head portion 3 at the other end of the shaft portion 2 is attached.
A connecting portion 33 for engaging and connecting with a rotary tool such as a screwdriver is formed on the rivet. When this rivet is used, the rivet is rotated by the rotary tool to open a hole in the material to be connected 9. This can be performed by the rivet itself equipped with the drill blade 25, and as shown in FIG. 4, after inserting the rivet body 1 into the materials 9 to be connected, as in the case of the above embodiment, the protrusion 4 By tapping,
The caulking can be performed as shown in. 6 (a) and 6 (b) show an example of the shape of the connecting portion 33 provided on the head 3. In the former case, a notch for leaving a non-circular portion is formed, and in the latter case, a radial groove is formed. By doing so, the connecting portions 33 are provided respectively, but the shape is not limited to this.

The rivet shown in FIG. 7 shows a plurality of axially long slits 24 formed on the outer surface of the shaft portion 2 on the tip side of the portion on which the protruding portion 20 is provided. These slits 24 facilitate deformation of the shaft portion 20 when it is plastically deformed by hitting the protrusions 4, and reduce the possibility that unnecessary effects will occur on the connected members 9, 9 during caulking work. The slit 24 may have a slit shape that reaches the inner surface of the shaft portion 2.

By the way, when the protrusion 4 is pushed in to form the caulking projection 22, if there is a gap between the members to be connected 9, the gap may remain after the caulking. In order to eliminate this inconvenience, the one shown in FIG. 8 is provided with a small provisional fixing projection 26 on the outer surface of the shaft portion 2, and when the shaft portion 2 of the rivet body 1 is press-fitted into the members to be connected 9, 9, The materials to be connected 9, 9 are sandwiched between the head 3 and the temporary fixing projection 26. The temporary fixing projection 26 is the same figure
As shown in (b), it is preferable to provide a plurality. still,
The temporary fixing projection 26 as shown here is provided with the connected members 9,
It is provided at a position corresponding to the thickness of 9 and a plurality of types having different positions are prepared, or provisional fixing protrusions 26 are provided at a plurality of positions on the outer surface of the shaft portion 2 in the axial direction. ,
It is possible to correspond to the materials 9 to be connected having various thicknesses.

As shown in FIG. 9, the temporary fixing projections 26 are
It may take the form of a male screw provided on the outer surface of the shaft portion 2. If the inner diameter of the hole 90 provided in the material to be connected 9 is made slightly smaller than the outer diameter of the temporary fixing projection 26 which is a male screw, the rivet body 1 rotates with the connecting portion 33 provided in the head 3. Hole 9 that can be screwed using a tool
By inserting it into 0, it is possible to prevent a gap from being generated between the connecting members 9 and 9. Even in the case where the drill blade 25 is provided, it goes without saying that such a temporary fixing projection 26 is effective.

The rivet shown in FIG. 10 has a head portion 3 provided with an engaging portion 36 for axial connection with a tool 5 for pushing in the protrusion 4. That is, when the tool 5 of the type that pushes the rod 50 in the axial direction is used as the tool 5, the force of pushing the protrusion 4 into the connected materials 9 and 9 is applied as it is, and the thickness of the connected materials 9 and 9 is thin. At times, the connected members 9, 9 may be deformed, but the hook 56 provided on the tool 5 is engaged with the engaging portion 36 provided on the head 3 of the rivet body 2 to allow the rivet body 1 and the tool 5 to be deformed. If the rods 50 are used to push the protrusions 4 into the rivet body 1, the rods 50 can be pushed without affecting the connected members 9, 9.
If the engaging portion 36 has a shape that can be grasped by a tool such as pliers, and if the punch 4 is hit with a punch or a hammer, the materials to be joined 9, 9 can be connected without using the dedicated tool as described above. The caulking work can be performed without affecting the.

As shown in FIG. 11, if a female screw 28 is formed on the inner peripheral surface of the shaft portion 2 of the rivet body 1 on the side of the head portion 3, it can be engaged with the connecting portion 33 provided on the head portion 3. The protrusion 5 can be pushed in only by rotating the rod 50 having the male screw 58 provided on the outer peripheral surface of the tool 5 provided with the detent piece 53 for detenting the rivet body 1. In this case also, the rivet 5 can be pushed. Since the protrusion 4 is pushed into the main body 1, the situation in which the connected material 9 is deformed is not caused. Reference numeral 59 in the figure is a stopper for regulating the pushing depth. The anti-rotation piece 53 is slidable in the axial direction and is spring-biased in the protruding direction. With respect to the rivet having the internal thread 28, it is possible to replace the rod 50 with a bolt that is screwed into the internal thread 28, and screw the bolt with a commercially available wrench to caulk. If the male screw 58 provided on the rod 50 is of the tapping type, even if the female screw 28 is not provided on the rivet body 1 side,
Since the rod 50 moves into the shaft portion 2 while forming a female screw on the inner surface of the shaft portion 2, the caulking work can be performed by pushing the protrusion 4 in the same manner as in the above case.

As the tool 5 of the type that pushes out the rod 50 described above, for example, a tool that pushes out the rod 50 by a mechanism using a rack and pinion or a relationship between a screw shaft and a nut can be used. In pushing, as in the case of using a punch and a hammer, pushing the protrusion 4 as quickly as possible has less influence on the connected material 9. In other words, even if the hook 56 as described above is not used for axial connection, the connected material 9 is not affected. The one shown in FIG. 12 shows an example of the construction tool 5 in view of such a point, and the rotation surface is relative to the shaft 62 with respect to the shaft 62 through which the rotation of the motor 6 is transmitted by the gears 60 and 61. An oscillating body 63 composed of an obliquely intersecting inner ring, an outer ring freely rotatable with respect to the inner ring, and an arm protruding from the outer ring is provided, and a rear end side of an axially slidable cylinder 64 is an oscillating body. It is connected to the arm of 63 through a universal joint, and the cylinder 6
The piston 65 is housed inside the tip end of No. 4.

In this tool 5, when the motor 6 is rotated, the cylinder 64 is reciprocally driven back and forth, and the piston 65 follows this reciprocal movement due to the pressure change of the air chamber 66 in the cylinder 64, and the piston 65 When the piston moves forward, the piston 65 strikes the rear end of the rod 50 which is in the retracted state by being pressed against the stem 4, whereby the rod 50 is rapidly advanced and the striking operation of the stem 4 is performed. In addition to the electric air piston system, there are various types of rods that can be rapidly moved, and any type may be used.

The tool 5 shown in FIG. 13 has a drill blade 25.
The present invention can be applied to a rivet of the type that has a rod, and the configuration for driving the rod 50 is the same as that of the above-described embodiment, but in addition to this, a rotary shaft 67 surrounding the rod 50 is provided, and the rotary shaft 67 is provided. 67 and the tip of the shaft 62 are connected by gears 68 and 69 so that the rotation can be transmitted to the rotary shaft 67, and the clutch 70 provided on the shaft 62 is switched so that the shaft 63 and The rotation transmission can be switched to the rotation shaft 67 side.
By engaging the tip of the rotating shaft 67 with the connecting portion 33 of the rivet head 3 and rotating the rivet, the rivet body 1
Is passed through the members to be connected 9, 9, and thereafter, the rotation of the clutch 70 is switched by the switch 71 to transmit the rotation to the oscillating body 63 side, and the rod 50 is driven by the impact shock given by the cylinder 64, the air chamber 66, and the piston 65. By launching
The strut 4 is tapped. Rivet body 1 with a single tool
Can be rotated and the protrusion 4 can be pushed in.

As the rod 50 in the tool 5 applicable to the rivet of the type having the drill blade 25, not only the rod 50 that moves in the axial direction but also the one that is rotationally driven can be used. As the protrusion 4 in the rivet, in addition to the steel ball, a tip having a hemispherical tip as shown in FIG. 14 (a) or a truncated cone shape as shown in FIG. 14 (b) is used. It may be. Further, here, the rivet body 1 is stored in the shaft portion 2 in a state of being prevented from coming off, but it may be inserted into the shaft portion 2 at the time of caulking work.

[0019]

As described above, in the rivet according to the present invention, there is no part that is finally unnecessary, and the pushed-in protrusion also reinforces the shaft portion, which is low in cost. In addition to being highly reliable, it also has excellent workability because the rivet body is inserted into the connected material and the protrusion is pushed in the same direction,
For example, the work is easy even when caulking the materials to be connected located from the lower side to the upper side.

Further, the construction tool according to the present invention can efficiently perform the rivet crimping work.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a rivet according to an embodiment.

FIG. 2 is a sectional view of the same as after caulking.

FIG. 3 is a cross-sectional view of a rivet according to another embodiment.

FIG. 4 is a cross-sectional view showing the same operation as above.

FIG. 5 is a sectional view of the same as after caulking.

FIG. 6 shows an example of the shape of the connecting portion of the head of the rivet, and FIGS. 6 (a) and 6 (b) are plan views.

FIG. 7 shows a rivet of another embodiment, (a) is a sectional view and (b) is a horizontal sectional view of the same.

FIG. 8 shows a rivet of still another embodiment, (a)
Is a sectional view, and (b) is a horizontal sectional view of the same.

FIG. 9 is a cross-sectional view of another example.

FIG. 10 shows another rivet construction procedure,
(a) (b) (c) is a sectional view before caulking, during caulking, and after caulking, respectively.

FIG. 11 shows another rivet construction procedure, in which (a)
(b) and (c) are cross-sectional views before caulking, during caulking, and after caulking, respectively.

FIG. 12 is a cutaway side view showing an example of a construction tool according to the present invention.

FIG. 13 is a cutaway side view of another construction tool.

14 (a) and 14 (b) are front views showing other examples of the protrusions.

FIG. 15 shows a rivet construction procedure of a conventional example,
(a) (b) (c) is a sectional view before caulking, during caulking, and after caulking, respectively.

[Explanation of symbols]

 1 Rivet body 2 Shaft 3 Head 4 Sprout

Claims (13)

[Claims] 1. A hollow shaft portion which is inserted into a plurality of superposed members to be connected, a head portion having a diameter larger than that of the shaft portion and which is provided at an end portion on the opening side of the shaft portion, A rivet comprising: a protrusion that is pushed into the shaft portion from the head side to form a caulking protrusion portion on the outer surface of the shaft portion by plastic deformation. 2. The shaft portion has a cylindrical shape with a bottom, and a projection portion having an inner diameter smaller than the outer diameter of the protrusion is provided on an inner surface of a portion where the protrusion for caulking is formed, and the protrusion is inside the shaft portion. The rivet according to claim 1, wherein the rivet is arranged between the protrusion and a slightly narrowed opening on the head side. 3. The rivet according to claim 1, wherein the shaft portion has a connecting portion with a rotary tool at a head portion at one end and a drill blade at the other end. 4. The rivet according to claim 1, wherein the shaft portion is provided with a temporary fixing projection on its outer surface. 5. The rivet according to claim 4, wherein the temporary fixing projection is formed as a male screw. 6. The rivet according to claim 1, wherein the shaft portion is provided with a slit. 7. The rivet according to claim 1, wherein the shaft portion has an internal thread formed on the inner surface of the head side thereof. 8. The rivet according to claim 1, wherein the head portion is provided with an engaging portion for axial connection with a construction tool. 9. The rivet construction tool according to claim 1, comprising a rod for pushing in the protrusion and a drive section for impacting the rod. tool. 10. The rivet construction tool according to claim 1, further comprising a rod for pushing the protrusion and a drive portion for rotationally driving the rod, wherein the rod outer surface is provided on the inner surface of the rivet shaft portion. A rivet construction tool, which is provided with a male screw forming a female screw. 11. The tool for constructing a rivet according to claim 7, comprising a rod for pushing in the protrusion and a drive portion for rotationally driving the rod, wherein the rod outer surface is provided with an inner surface of the rivet shaft portion. A rivet construction tool, which is provided with a male screw that is screwed into the female screw. 12. A tool for constructing a rivet according to claim 3, wherein a rod for pushing the protrusion and a rotary shaft provided at a tip end thereof with a coupling engagement portion that engages with a coupling portion of the rivet head. And a drive unit that pushes out the rod and rotates the rotary shaft. 13. The rivet construction tool according to claim 8, wherein a rod for pushing the protrusion, a drive portion for pushing the rod, and an engagement means connected to the engagement portion of the rivet head. A tool for rivet construction, characterized by being equipped with.