JPH084181Y2 - Riveting machine - Google Patents

Description

[Detailed description of the device]

[0001]

This invention relates to a riveting machine.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a lid plate 33 is dropped into an annular step portion 32 provided on the entire inner circumference of an end edge of a tubular body 31, and the edge ring of the tubular body 31 is annular. In order to bend the entire outer edge of the step portion 32 inward to form the embracing bent portion 34 of the lid plate 33, first, the tubular body 31 is held on a table by using a jig. A lid plate 33 is previously dropped into the annular step portion 32 of the cylindrical body 31.

Next, while the molding tool is lowered together with the drive spindle by the extension action of the cylinder, the cylindrical body 31
When the molding shaft of the molding tool is pressed against the end edge of the lid, the wrapping bending portion 34 of the lid plate 33 is bent as shown in FIG. Mold.

[0004]

According to the above-described riveting machine, the lid plate is not pressed down when the hugging bent portion of the lid plate is molded, so that the lid plate is kept pressed against the bottom surface of the annular step. However, the bent portion cannot be molded. Therefore, rattling occurs on the cover plate.

In particular, when an elastic member such as a spring which is compressed by dropping the lid plate is incorporated in the tubular body, the lid plate is pushed back by the elastic member and the lid plate can be sealed in the annular step portion. Can not. Then, the subject of this invention is to provide the riveting machine which shape | molds a bending part, pressing a cover plate.

[0006]

In order to solve the above problems, the present invention provides a molding tool for holding a molding shaft at the lower end of a spindle which is rotated by a motor and moves up and down by the action of a cylinder. While supporting the cylindrical body in which the lid plate is dropped on the inner peripheral annular step of the end edge, the lower end of the molding shaft is pressed against the upper end edge of the cylindrical body by the lowering of the spindle. In a riveting machine in which the upper edge of the tubular body is bent inward by the swinging and swinging of the molding shaft to mold the bent portion that encloses the peripheral edge of the lid plate, the molding portion is formed in the molding shaft. In addition to incorporating a push pin that emerges from the center of the, the push pin is given a downward force.

[0007]

Operation: First, a jig is used on a table to hold the cylinder into which the cover plate has been dropped. Next, when the molding tool is lowered together with the spindle by exerting pressure in the extension direction on the cylinder, first, the lower end of the push pin contacts the center of the top surface of the lid plate to press down the lid plate, and the lowering of the molding tool continues. While the push pin is pushed back against the applied thrust, the lid plate is kept pressed down, and when the molding part of the molding shaft comes into contact with the upper end edge of the cylindrical body, the cylindrical shaft is swung and swung to move the cylindrical body. The upper edge is bent inward to form a bent portion that encloses the peripheral edge of the lid.

After molding, a pressure in the shrinking direction is applied to the cylinder to raise the molding tool together with the spindle.
The push pin is made to protrude by the applied protrusion force as the molding tool rises.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, a column 3 with a table 2 is erected on a pedestal 1, and a spindle that is rotated by a motor 4 and is moved up and down by a contracting and extending action of a cylinder 5 is mounted on the column 3. 6 is provided.

The above-mentioned spindle 6 is pierced through the axis of the piston shaft 7 of the cylinder 5 and is supported so as to move up and down together. The motor 4 is installed on the upper end of the piston shaft 7 so as not to rotate, and moves up and down together with the piston shaft 7.

The lower end of the spindle 6 has a molding shaft 8
The holding molding tool 9 is provided. Molding shaft 8 above
As shown in FIG. 2, a bent molding portion 10 having a bent shape (there is also a shape other than the pot bottom shown in the drawing) is provided on the lower end surface thereof.

Further, in the lower end of the molding shaft 8, the molding portion 1
A push pin 11 is provided penetrating through the center of 0 so that the push pin 11 is provided with a protruding output at the bottom.

In the illustrated case, the push pin 11 is the shaft member 1.
A concave hole 13 is provided upward from the center of the lower end surface of 2, and the upper end annular projection 16 of the tubular member 15 having the molding portion 10 is fitted into the lower end surface of the concave hole 13 and screwed into the shaft member 12. The tip of the setscrew 17 is pressed against the outer peripheral surface of the protrusion 16 to fix the tubular member 15 to the shaft member 12, and the end retaining collar 18 of the pin 11 and the bottom surface of the recessed hole 13 which are inserted into the tubular member 15 in advance. Both ends of the spring 19 are brought into contact with each other to give a protruding output and can be replaced.

With the above construction, when the dropping cylindrical member 31 of the cover plate 33 is held on the table 2 via the jig and the cylinder 5 is extended to lower the molding tool 9 together with the spindle 6, First, since the lower end of the push pin 11 comes into contact with the lid plate 33, the lid plate 33 is pressed against the bottom of the annular step portion 32, and the push pin 11 is pushed back against the applied protruding force as the molding tool 9 continues to descend. Continue to hold down the cover plate 33, and at the upper edge of the tubular body 31, press the molding shaft 8
When the molding part 10 of FIG. 1 comes into contact, the upper edge of the tubular body 31 is bent inward by the swinging and swinging of the molding shaft 8 to mold the peripheral edge holding bent part 34 of the lid plate 33 (shown in FIG. 4). .

[0016]

[Effect] As described above, according to the riveting machine according to the present invention, the lid plate is pressed by the push pin immediately before the hugging bent portion of the lid plate is molded by the molding shaft. The lid plate can be sealed without rattling by pressing the peripheral edge to.

Even if the spring is incorporated in the tubular body, the spring can be compressed to seal the lid plate.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a partially cutaway enlarged front view of the molding shaft.

FIG. 3 is a vertical cross-sectional front view of a tubular body with a cover plate dropped in.

FIG. 4 is a vertical sectional front view in which a cover plate is enclosed.

[Explanation of symbols]

 1 Seat 2 Table 3 Column 4 Motor 5 Cylinder 6 Spindle 7 Piston Shaft 8 Molding Shaft 9 Molding Tool 10 Molding Part 11 Push Pin 12 Shaft Material 13 Recessed Hole 15 Cylindrical Material 16 Projection 17 Set Screw 18 Collar 19 Spring

Claims (1)

[Scope of utility model registration request] 1. A molding tool for holding a molding shaft is provided at a lower end of a spindle which is rotated by a motor and is moved up and down by the action of a cylinder, and a lid plate is dropped on an inner peripheral annular step portion of an edge on a table. A certain cylindrical body is supported, the lower end of the molding shaft is pressed against the upper end edge of the cylindrical body by the lowering of the spindle, and the upper edge of the cylindrical body is swung by the molding shaft. In a riveting machine that bends inwardly to form a bent portion that embraces the peripheral edge of the lid plate, a push pin protruding from the center of the molding part is incorporated in the molding shaft and A riveting machine characterized by being provided with a sudden output to.