JPS6054749B2 - Electrical terminal crimping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for crimping a connecting portion of an electrical terminal and an electric wire.

This type of crimping work is usually done by aligning the wire with the connection of the electrical terminal between a fixed metal fitting (hereinafter referred to as anvil) and a movable metal fitting (hereinafter referred to as crimper), and then moving the crimper in a direction closer to the ancel. This is done by inserting the connection part of the electrical terminal between the two and rolling it up, and then firmly holding the electric wire inside the rolled connection part.

By the way, in crimp-type electrical terminals that are currently commonly used, there is usually a certain range of wire sizes (i.e., conductor cross-sectional areas) that can be crimp-bonded to a certain type of electrical terminal.

However, it is necessary to change the degree of crimping depending on the cross-sectional area of the conductor. For example, in the case of a press device using a crank mechanism, changing the crimping setting level requires adjusting the length of the mouth of the crank mechanism, which is generally a manual process, and therefore it is difficult to change the crimp wire. It is extremely inefficient if the sizes differ for each small number of books.

On the other hand, with a press device that uses fluid pressure, it is relatively easy to change the setting degree of crimping, but since it is not possible to confirm that the specified crimping work has been completed, it is difficult to inspect the crimped part. I have no choice but to. Therefore, the object of the present invention is to
To provide an electrical terminal crimping device which allows easy change of setting degree of crimping and also allows confirmation of completion of a predetermined crimping work.

The present invention will be described below using embodiments with reference to the drawings.

1 and 2 show an embodiment of the present invention.

An anvil 2 is held at the bottom of the fixed block 1. A slider 4 is guided by a vertically rising guide block 3 so as to be movable up and down. This slider 4 is connected to the ram 6 of the upper pneumatic press 5 via a joint 7, and has a crimper 8 corresponding to the upper part of the anvil 2 and a stop pin 9 facing the upper surface of the fixed block 1. We are prepared. Further, on the side of the upper surface of the fixed block 1, a bottom dead center changing mechanism 10 is provided. This bottom dead center changing mechanism 10
When the rod 12 guided by the rod guide 11 attached to the guide block 3 is pressed by the pneumatic cylinder 13, the liner 14 provided at the tip of the rod 12 presses the stop pin 9 on the top surface of the fixed block 1. When the rod 12 and the . There is a mechanism by which the liner 14 can be retracted. Now, when the slider 4 is lowered by the pneumatic press 5 while the liner 14 is retreating, the stop pin 9 comes into contact with the upper surface of the fixed block 1 as shown in FIG. 4 descends. Rai again. When the liner 14 is advancing, the slider 4 stops at the position where the stop pin 9 abuts against the liner 14 as shown in FIG. In this way, the bottom dead center of the slider 4 and the crimper 8 can be changed by the thickness of the liner 14. Therefore, electric wires having different diameters can be connected to the electric terminal 16 between the anvil 2 and the crimper 8. Returning to FIG. 1, a needle mount 17 is provided on the side surface of the slider 4.

This needle mount 17 is provided with two conductive needles 18 and 19, both of which are vertically oriented and whose positions can be adjusted in the vertical direction by means of a screw-in structure. These needles 18 and 19 are electrically connected to a fixed part such as the guide block 3 via the needle mount 17 and the slider 4. Further, two conductive probe pins 21 and 22 are vertically disposed vertically below each needle 18 and 19 by a fixed probe pin holder 23. The probe pin holder 23 has probe pins 21, 2
2 from other structures. The height positions of the needles 18 and 19 are set separately and at different heights.

That is, one needle 18 has the stop pin 9 connected to the liner 14.
The height is such that the lower end of the needle 19 contacts the upper end of one of the probe pins 21 as shown in FIG. Adjust so that it is in the upper position.
On the other hand, the probe pins 21 and 22 are as shown in FIG.
A movable contact 25 movably incorporated in the sleeve 24 in the axial direction.
A compression spring 2 is inserted between the fixed terminal 26 incorporated in the fixed structure and the
It has a structure with 7 interposed. In this way, the upper ends of the probe pins 21 and 22 are movable in the vertical direction, so when the liner 14 is retracted and the stop pin 9 comes into direct contact with the fixed block 1, one needle 18
pushes down the movable contact 25 of one probe pin 21 a little, and at the same time, the other needle 19 comes into contact with the upper end of the other probe pin 22. Furthermore, needle 1
In order to obtain more reliable contact, it is preferable to design the movable contactor 25 so that it can be pushed slightly into the sleeve 24 even when the probe pins 21 and 22 are in simple contact with each other. Returning to Figure 1 again, needle 18,1
Continuity testing devices 28 and 29 are provided to test electrical continuity between the probe pins 21 and 22 and a fixed portion such as the guide block 3 electrically connected to the probe pin 9 .

One continuity testing device 28 displays this when one needle 18 connects to the probe pin 21, and the other continuity testing device 29 displays this when the other needle 19 contacts the probe pin 22. It is something.
It goes without saying that these continuity testing devices 28 and 29 can be implemented in various configurations. Therefore, the electrical terminal 16
When crimping the electrical terminal 16 onto a wire with a small diameter, the pneumatic press 5 is driven with the liner 14 introduced, one of the continuity test devices 28 is used to confirm the completion of the work, and the electrical terminal 16 is crimped onto a wire with a small diameter. When crimping the electric wire, the pneumatic press 5 is driven with the liner 14 retracted, and the completion of the work can be confirmed using the other continuity testing device 29.

If a predetermined continuity is not detected, it is determined that the crimping is defective. As explained above using the embodiments, according to the present invention, the setting degree of crimping can be easily changed by advancing or retreating the liner, and furthermore, it is possible to confirm completion of the predetermined crimping work, so that the crimping part can be adjusted easily. It is possible to obtain an electrical terminal crimping device that requires less burden during the inspection stage.

It goes without saying that various design changes are possible.

For example, the bottom dead center changing mechanism may be combined with a wire inspection mechanism that can detect the thickness and type of the wire, and the bottom dead center changing mechanism may be linked to the wire inspection mechanism.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment of the electrical terminal crimping device according to the present invention, Fig. 2 is a sectional view taken along the line ■-■, and Fig. 3 is the main part showing the state when crimped to a small diameter electric wire. Cross section of chisel,
Figure 4 is a sectional view of only the main parts showing the state when crimped to a large diameter electric wire, Figure 5 is a front view showing the state when crimped to a large diameter electric wire, and Figure 6 is the structure of the probe pin. FIG. 1... Fixed block, 2... Anvil, 3... Guide block, 4... Slider, 5... Pneumatic brace,
8...k. Lymph, 9...stop pin, 10...
・Bottom dead center changing mechanism, 13...Pneumatic cylinder, 14...
・Liner, 16... Electrical terminal, 18, 19... Needle, 21, 22... Probe pin, 28, 29...
・Continuity testing device.

Claims (1)

[Claims] 1. A dead center changing mechanism that can change the closest distance of the movable side fitting to the fixed side fitting between multiple stages in a device for crimping an electric terminal to an electric wire by bringing a movable side fitting close to a fixed side fitting using a fluid pressure press. and a device for determining whether or not the movable metal fitting has reached its dead center based on the presence or absence of contact between a conductor carried together with the movable metal fitting and a fixed conductor.