JPH027153B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for connecting a terminal, and particularly to a method and apparatus for connecting a terminal and an insulated wire in a conductive manner without peeling off the end insulation material of the insulated wire to expose the conductor wire. It is related to the device.

Among the insulated wires, which are bare wires covered with an insulating material, small and highly flexible wires used for electrical connection of electrical equipment are particularly called cords.

There are two ways to connect this cord to electrical equipment. In other words, one method is to twist multiple strands of wire together to form a single straight conductor, and for cords whose surface is covered with an insulating material, remove the insulating material from the ends, expose the necessary length of the conductor, and directly wire the conductor. Connect to the device. Another method is to create a cord in which a conductor wire made of multiple strands is wound spirally around a cotton thread core wire and the surface is coated with an insulating material.
A part of the terminal is wrapped around the surface of the insulating material and connected, and the insertion piece protruding from the terminal is inserted into the conductor to enable conduction and connect to the device.

In the case of the latter cord, exposing the end of the conductor wire may cause the spirally wound conductor wire to be pulled out in a long straight line, so it cannot be directly connected to the device, and it is necessary to connect it through a terminal. A typical example of its use is in telephone line cords.

Conventionally, the terminal shown in the first figure has been used when connecting a terminal to the end of a cord made of twisted conductor wires wound around a core wire in a spiral shape and coated with an insulating material.

This terminal has a connecting part b integrally connected to a terminal base a, the connecting part b is formed in an upward U-shape, and an insertion piece c with a sharp tip is cut and raised in the center of the bottom. The connecting part b is connected by winding it around the end of the cord from the surface of the insulating material, and the insertion piece c is pierced up to the conductor wire to enable conduction.

Next, a method of connecting the terminal and the cord will be explained with reference to FIG. In the figure, d is a supporting mold, e is a pressing mold,
f is a code.

A supporting mold d having a semicircular upper surface and a pressing mold e having a semicircular lower surface g are arranged vertically opposite each other, and the connecting part b of the terminal is placed on the semicircular upper surface of the supporting mold d, and the end of the cord f is placed on the semicircular upper surface of the supporting mold d. If the mold e is lowered with the cord f and the connecting part b placed on the connecting part b, both the cord f and the connecting part b enter the semicircular surface g of the pressing mold e, and the downward pressure of the pressing mold e causes the connecting part b to be lowered. The rising pieces b1 and b2 on both sides are the surface g
The cord f is bent inwardly into a circular shape along the curved inner surface of the cord, and at the same time, the cord f is pressurized and the insertion piece c penetrates the surface insulation material and is inserted up to the conductor, and finally both rising pieces b1 and b2 are formed. They are connected by winding the cord f.

In the method of connecting the terminal and the cord described above, there is a risk that the cord itself may become eccentric due to the pressure applied, and due to the resistance of the insertion piece, the insertion piece may not be inserted straight to the conductor, but may be inserted in a bent state. , there may be a poor connection. Furthermore, since it is not possible to check the insertion state of the insertion piece, there is a risk that a defective product may be used as is.

SUMMARY OF THE INVENTION In view of the conventional method of connecting a terminal and a cord, it is an object of the present invention to provide a terminal connecting method in which an insertion piece is always inserted into the center of the conductor of the cord to complete the connection.

Another object of the present invention is to provide a terminal connection device that can effectively and continuously connect a terminal and a cord at a predetermined position.

The present invention will be explained in detail below with reference to the drawings.

FIG. 3 shows a pressing die used in the present invention. This mold is composed of a lower supporting mold 1 and an upper pressing mold 2. A semicircular surface 1a is formed on the upper surface of the supporting mold 1, which is slanted in the length direction, and a semicircular surface 1a is formed on the lower surface of the pressing mold 2, which is slanted in the longitudinal direction. The semicircular surfaces 2a to be formed are disposed so as to face each other vertically in parallel, and the press die 2 is movable up and down with respect to the support die 1.

The mold 2 is formed with a rectangular guide groove 3 that opens downward in a direction perpendicular to the length direction of the semicircular surface 2a. In this guide groove 3, a pressing member 4 is suspended and supported by a spring 5 so as to be able to move in and out. Under normal conditions, the lower part of the pressing member 5 projects downward from the lower surface of the pressing die 2 due to the elasticity of the spring 5. It's becoming like that. The pressing member 4 is
It may be provided at least at one location on the mold 2, but it may be provided at two locations at an appropriate interval as shown in the third figure.

The press type has the above configuration, and the terminal for connecting the cord will be explained next.

As shown in FIG. 4, the rising pieces 7a and 7b on both sides
In the terminal of the same shape as the conventional one, in which the connecting part 7 is integrally connected to the terminal base 6 and the insertion piece 8 with a pointed tip is cut and raised at the bottom, the connecting part 7 is formed into an upward U-shape. In the rising pieces 7a and 7b,
The pressing member 4 at a position corresponding to the insertion piece 8
A cutout groove 9 is provided in which a person can enter.

The cord connecting process using the above pressing die and terminal is shown in Fig. 5 a, b, c and Fig. 6 a, b,
This will be explained according to c.

As shown in FIGS. 5a and 6a, the terminal connecting portion 7 is placed on the semicircular surface 1a of the support mold 1.
The insertion piece 8 and the notch groove 9 are placed so that the pressing member 4 of the upper mold 2 are vertically opposed to each other.

Then, when the end of the cord 10 is placed on the connecting part 7 and the pressing die 2 is lowered, the pressing member 4 first comes into contact with the cord 10, and the pressing member 4 lowers the cord 10 by the elasticity of the spring 5. Push in the direction.

As shown in FIG. 5b and FIG. 6b, the press die 2 is further lowered, and the press member 4 is raised on both sides 7a, 7.
If the cord 10 is pushed down into the groove 9 of b, the insertion piece 8 that stands upright on the bottom of the connection part 7 will
It will be inserted straight up to the conductor inside. When the insertion piece 8 is inserted into the cord 10 and the connection between the insertion piece 8 and the conductor is complete, the lower surface of the pressing member 4 comes into contact with the bottom surface of the groove 9, and the pressing member 4 It will never fall further.

Next, if the mold 2 is further lowered, as shown in Fig. 5c.
As shown in FIG. 6c, the pressing member 4 enters the guide groove 3 against the elasticity of the spring 5, and the semicircular surface 2a of the pressing die 2
abuts against the upper end of b. As the press die 2 descends, the rising pieces 7a and 7b are bent inward along the semicircular surface 2a, and at the lowest point of descent of the press die 2, the rise pieces 7a and 7b are wound around the outer periphery of the cord 10. The terminal connecting portion 7 and the cord 10 are connected and fixed.

In the above description, the press die 2 is movable up and down with respect to the support die 1, but the present invention is not limited to this. The support die 1 may be movable up and down relative to the press die 2.

According to the present invention described above, in the step of inserting the insertion piece 8 into the cord 10, the cord 10 is inserted until the insertion piece 8 is completely inserted up to the conductor inside the cord 10.
Since the cord 10 is supported by the pressing member 4, the cord 10 will not be eccentric, and the connection between the insertion piece 8 and the conductor wire will be perfect.

Furthermore, after connecting the insertion piece 8 and the conductor, the connecting portion 7
The process of wrapping the rising pieces 7a and 7b around the outer periphery of the cord 10 is performed in a separate process, although it is continuous with the process described above, so that the connection part 7 and the cord 10 can be tightened.
The connection and fixation will be complete.

Further, the pressing member 4 has a pressing force due to the elasticity of the spring 5 and can enter the guide groove 3 against the elasticity of the spring 5, so that the cord 10 is supported by the pressing member 4 while The cord 10 can be effectively wound and tightened by the rising pieces 7a and 7b, and a product with good connection can be obtained.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an example of a terminal in the prior art, Fig. 2 is an enlarged cross-sectional view of main parts showing the connection state between the terminal and the cord in the prior art, and Fig. 3 is a perspective view of a press die used in the present invention. 4 is a perspective view showing an example of a terminal used in the present invention, FIGS. 6
Figures a, b, and c are enlarged cross-sectional views of the main parts seen from the same front. 1 is a supporting mold, 2 is a pressing mold, 3 is a guide groove, 4 is a pressing member, 5 is a spring, 6 is a terminal base, 7 is a connecting portion, 8 is an insertion piece, 9 is a notch groove, and 10 is a cord. .

Claims (1)

[Claims] 1. On the semicircular surface 1a formed on the upper surface of the support mold 1, an upward U-shape is formed and an insertion piece 8 is cut and raised at the bottom, and at a position corresponding to the insertion piece 8. A press mold 2 having a terminal connecting portion 7 having cutout grooves 9 on both rising pieces 7a and 7b and having a semicircular surface 2a on the lower surface parallel to and opposing the semicircular surface 1a.
A pressing member 4 that can enter the groove 9 by applying a downward pressing force from the mold 2 due to the elasticity of the spring 5 into the guide groove 3 that is perpendicular to the semicircular surface 2a formed in the The process of pressurizing the cord 10 placed on the connecting part 7 and inserting the insertion piece 8 into the conductor inside the cord 10, and the semicircular surface 2a of the descending press 2, cause the rising piece 7 of the connecting part 7 to
A terminal connection method comprising the steps of bending a and 7b inward and wrapping them tightly around the outer circumference of a cord 10. 2. With an upwardly facing U-shape, an insertion piece 8 is cut and raised at the bottom, and a terminal connection part 7 with cutout grooves 9 provided in both rising pieces 7a and 7b is fixed at a position corresponding to this insertion piece 8. A support mold 1 having a possible semicircular surface 1a on the upper surface, and a press mold having a semicircular surface 2a on the lower surface parallel to and opposing the semicircular surface 1a, and a guide groove 3 formed in a state perpendicular to the semicircular surface 2a. 2, and in the guide groove 3, a pressing member 4 whose lower part normally projects below the pressing mold 2 and which can fit into the notched groove 9 is suspended and supported by a spring 5 so as to be freely in and out. Characteristic terminal connection device.