JPS6052004A - Cutting and bending method of coil terminal - Google Patents

Abstract

PURPOSE:To cut and bend a coil terminal through one process by using a vertically driven pendulum type punch and a pendulum type lower cutting edge die. CONSTITUTION:A device used for cutting and bending process for a coil terminal is constituted by a pendulum type punch 3, which is supported to a support base 10 by a shaft 8 and brought to a rocking-free state, and a pendulum type lower cutting edge die 7, which is supported to a base 15 by a shaft 9 and brought to the rocking-free state. When a coil frame 1 is set to the base 15 and the punch 3 is dropped, the unnecessary section of the coil terminal 2 is cut between a cutting edge section 6 for the punch 3 and the lower cutting edge die 7. When the punch 3 is further dropped, a projection 5 in the punch 3 pushes and bends the end section of the coil terminal 2, and the inclined plane 4 of the punch 3 is brought into contact with the inclined plane 16 of the base 15 to rock the punch 3 to the left, and the coil terminal 2 is pushed and bent up to the surface of the coil frame 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field 1] The present invention relates to a method for cutting and bending coil terminals insert-molded into a coil frame, particularly a small one used in a small relay.

[Background Art 1] As shown in Fig. 1, the fill terminal 2 insert-molded in the coil frame 1 is formed by keeping one end of the coil outer wire connected to the winding toy long, and Later, this one end is bent along the surface of the coil frame 1 and unnecessary portions are cut to form a portion 20 where the coil outer wire is wound around the coil terminal 2, as shown in FIG. In the past, it was difficult to bend the material after cutting it into short lengths, so it was done in two processes or steps: first bending the long material before cutting, and then cutting it to a fixed size. However, the processing required time, and two types of mechanisms were required, one for cutting and one for bending.

[Object of the Invention] The present invention has been made in view of the above points, and its object is to provide a method for cutting and bending a coil terminal, which can perform cutting and bending in one step of lowering a punch. It is in.

[Disclosure of the Invention] Accordingly, the present invention cuts a coil terminal between a vertically driven pendulum punch and a pendulum lower cutting blade, and then lowers the punch further and swings the punch to form a punch. The coil terminal is characterized in that the cut coil terminal is bent by the protrusion, and the cutting is first performed as the punch descends, and then the bending is performed by the swinging protrusion of the punch.

The present invention will be explained in detail below based on the illustrated apparatus.

3 in the figure is a punch that is driven downward, and this punch 3 is a pendulum-type punch that is partially supported by a shaft 8 on a support base 10 so that it can swing freely within a small angle range. The lower end surface is an inclined surface 4, the lower side surface t is provided with a protrusion 5, and a cutting blade 6 is formed at a position above the lower end surface. As is clear from FIG. 1, since the position of the fill terminal 2 provided on the coil frame 1 is shifted downward by 1", the pair of protrusions 5 and the pair of cuts on this punch 3 are The blade portion 6 is also vertically displaced.

A pair of lower cutting blades 7 are provided below the punch 3, corresponding to each coil terminal 21. And, like Punch 3, Ameshita Kirito Dia has a shaft of 9 and a base of 15 at the bottom.
It is of a pendulum type supported by and swingable, and can also move up and down, and is further biased in the -L direction by a =3= spring 13. In addition, these pendulum-type punches 3 and Shimokiri-o-Dia have spring-biased pins 11 and 12, respectively, that are in contact with the side surfaces, so that they do not touch the support stand 10 and the base 15 under normal conditions. The position has been determined.

The fill frame 1 is then set on the base 15 with the punch 3 shown by the two-dot chain line in FIG. 11 is in contact with the side surface, it is moved to the right in the figure, and when it goes down to the position shown by the solid line, the unnecessary part of the coil terminal 2 is removed between the cutting blade part 6 of the punch 3 and the lower cutting blade dia. A cut is made. Then, when the punch 3 further descends, the protrusion 5 pushes down the lower cutting blade diamond as shown by the broken line in the figure, forming a space below the coil terminal 2 that has been shortened after cutting, and the protrusion 5 also pushes down the lower cutting blade dia as shown by the broken line in the figure. Push the end of 2 downward and bend it slightly.

When the punch 3 further descends from this state, the slope 4 of the punch 3 touches the slope 16 provided on the base 15, and the punch 3 slides on this slope 16, as shown by the dashed line in the figure. As it swings to the left, the protrusion 5 swings the lower cutting blade and further bends the coil terminal 2 until it is along the surfaces of the four parts of the coil frame 1.

Note that these cutting and bending operations are performed simultaneously on the pair of coil terminals 2 in the fill frame 1. When the bending is completed, the punch 3 moves upward and one process is completed.

[Effects of the Invention] As described in 2 below, in the present invention, a pendulum-type punch and a lower cutting die are used to cut and bend a coil terminal with only one step of lowering the punch. This makes it easy to cut and bend coil terminals, and only requires a small press and a simple jig, making it possible to process single coil terminals inexpensively and quickly. It can be done.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the coil frame before processing the coil terminal, Figure 2
The figure is a perspective view of the coil frame after processing the coil terminal, FIG. 3 is a front view of the device according to the present invention, and FIG. 4 is an enlarged sectional view of the same, in which 1 is the coil frame, 2 is the coil terminal, 3 is a punch, 5 is a protrusion, and 7 is a lower cutting die. Agent Patent Attorney Ishi 1) Chief 7 Figure 2 1 Figure 3

Claims (1)

[Claims] (1) The coil terminal is cut between the pendulum type punch that is driven downward and the pendulum lower cutting blade, and then the punch is further lowered and the punch is swung to cut the coil terminal using the protrusion formed on the punch. A method for cutting and bending a coil terminal, characterized by bending a coil terminal.