JPS5923896B2 - riveting jig - Google Patents

Description

[Detailed description of the invention] This invention relates to a riveting jig.

Conventionally, as shown in FIG. 1, when a fence lattice 1 and a horizontal beam 2 are joined together, they are joined by welding.

The lattice 1 is made of a square pipe, and the horizontal bars 2 are made of lip channel steel.

However, welding work is inefficient and on-site welding is unreliable, so an attempt was made to join using hollow rivets 3 as shown in FIG.

The rivet 3 has a cylindrical shaft portion 3a as shown by the chain line in FIG.
and a head 3b, and joining is performed by crimping the tip of the shaft portion 3a into an open state as shown by the solid line in the figure.

However, when tightening rivet 3 in this way,
If a recessed crimping jig is used to shape the tip of the rivet 3, a problem arises in that the rivet 3 remains caught after crimping and cannot be removed from the lattice 1.

For this reason, joining using hollow rivets 3 as shown in FIG. 2 could not be realized.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a rivet that, when riveting other members to a pipe, etc., can support and mold the tip of the rivet from the inside of the pipe, and can then be easily pulled out from the pipe, etc. The purpose is to provide a jig.

An embodiment of the invention is shown in FIGS. 3 to 5.

That is, this riveting jig 4 is composed of a rod-shaped caulking die 5 and a slide die 6, a support base material 7, and a connecting piece 8 integrally protruding from the support base material T.

The crimping die 5 has a rivet crimping recess 9 on the outer surface of the tip.
It has a support protrusion 10 on the inner surface and an engagement protrusion 11 on the inner surface of the proximal end.
have.

The caulking die 5 is rotatably connected to the connecting piece 8 via a pivot pin 12.

The slide die 6 has a long hole 13 extending in the longitudinal direction, and a connecting pin 14 provided on the connecting piece 8 is inserted through the long hole 13.

The connecting pin 14 has a head (not shown) for preventing removal.

The slide die 6 has a supporting protrusion 1 for the crimping die 5 on the inner surface of the tip.
0, and a guide protrusion 16 that engages with the engagement protrusion 11 of the crimping die 5 on the inner surface of the intermediate portion.
have.

The guide protrusion 16 is such that both the dies 5 and 6 have the supporting protrusion 10,
15 are located at a position where they are removed from the engaging protrusion 11 when they are in the sliding position where they engage with each other.

With this configuration, the lattice 1 and the horizontal bars 2 are riveted together in the following manner.

First, the riveting jig 4 is inserted into the lattice 1 with the engaging protrusions 10 and 15 of both dies 5 and 6 in contact with each other as shown in FIG.

At this time, the caulking die 5 and the slide die 6 are parallel to each other and fit into the inner surface of the grid element 1.

Furthermore, the support base material 7 is in contact with the outer surface of the lattice 1 .

In this state, the press 17 inserts the hollow rivet 3 from the inner surface of the horizontal crosspiece 2 at a position corresponding to the crimping recess 9 of the crimping die 5.
etc.

As a result, the rivet 3 punches out the two plate-like portions of the horizontal bar 2 and the lattice 1 with its cylindrical shaft portion 3a, and is crimped into an open state by the crimping recess 9 of the crimping die 5.

When the driving is completed in this manner, the slide die 6 is pulled back outward as shown in FIG.

As a result, the guide protrusion 16 of the slide die 6 and the engagement protrusion 11 of the crimping die 5 engage with each other, the tip of the crimping die 5 rotates in the closing direction, and the crimping recess 9 closes the rivet 3. deviate from

Therefore, the riveting jig 4 can be pulled out from the lattice 1.

In this way, the tip of the rivet 3 can be supported and formed by the riveting jig 4, and can be easily pulled out from the grid 1.

Although the above-mentioned embodiment has been described in connection with the case where the lattice 1 and the horizontal beams 2 are joined, the present invention can be widely used to join general square pipes and other members.

Further, in the embodiment described above, the support protrusions 10 and 15 were provided at the tips of both the caulking die and the slide die 6, but the support protrusions 10 and 15 may be provided only on either one of the dies 5 and 6. good.

Furthermore, in the embodiment described above, the crimping die 5 and the slide die 6 were connected via the connection piece 8 of the support base material 1, but these dies 5.6 can be moved in the longitudinal direction and rotated to open and close relative to each other. They may be connected, for example, the support base material 7 may not be used and the connecting piece 8 may be provided integrally with the crimping die 5.

As described above, the riveting jig of the present invention connects a bar-shaped crimping die and a slide die by engaging the long hole provided along the longitudinal direction of one die. A connecting piece having a pin is connected so as to be able to move in the longitudinal direction and rotate to open and close in a state substantially parallel to each other, and the inner surface of the tip of at least one of these dies engages with the other die as the die moves in the longitudinal direction. Since a supporting protrusion is provided to maintain a parallel posture that can be removed, and a rivet crimping recess is provided on the outer surface of the tip of the crimping die, when riveting other members to a pipe, etc., the inner side of the pipe, etc. This has the effect that the tip of the rivet can be supported and formed, and then it can be easily extracted from the pipe or the like.

[Brief explanation of the drawing]

Fig. 1 is a front view of the fence, Fig. 2 is an enlarged sectional view of the portion H surrounded by the chain line in Fig. 1, Fig. 3 is a front view of an embodiment of the present invention, and Fig. 4 shows its different operating states. The front view and FIG. 5 are also illustrations for explaining its use. 1... Lattice, 2... Horizontal beam, 3...
... Rivet, 4 ... Riveting jig, 5
・・・・・・Crimp die, 6・・・Slide die, 7・・・Support base material, 8・・・Connection piece, 9
....Clinching recess, 1 [1, 15 ... Support protrusion, 13 ... Elongated hole, 14 ... Connection pin.

Claims (1)

[Claims] 1. A rod-shaped crimping die and a slide die are held approximately parallel to each other using a long hole provided in one die along the longitudinal direction and a connecting piece having a connecting pin that engages with this long hole. The dies are connected so as to be movable in the longitudinal direction and rotated to open and close, and at least one of the dies is provided with a supporting protrusion on the inner surface of the distal end thereof for maintaining a parallel posture that engages and disengages from the other die as the dies move in the longitudinal direction. A riveting jig with a rivet crimping recess on the outer surface of the tip of the crimping die.