JPH0253916B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pair of female and male flat plug-in connectors that can be freely inserted and connected to each other, and a female-type differential connector in which a female-type terminal is fitted and held within a resin insulating cover. A flat plug connector (JIS
With the conductor at the end of the electric wire inserted into the crimp tube of the female terminal of the standard (standard name), the crimp tube is crimped by operating a pair of dies to electrically connect the wire and the plug-in connector. , regarding how to physically connect.

The plug-in connector has a cylindrical part that guides the insertion of the electric wire at one end of the insulating cover that fits and holds the female terminal, and the conductor part at the end of the electric wire is inserted into the female terminal through this cylindrical part. Since it is necessary to insert the wire into the crimping cylinder part, the conductor part, which is a collection of thin wires, is inserted into the inner surface of the insertion cylinder part of the cover, compared to the case where the conductor part at the end of the wire is directly inserted into the crimping cylinder part. The insertion of the conductor portion may be incomplete, such as when the wire gets caught and folded back, or the edge of the insulation coating of the wire forming the stepped portion hits the periphery of the entrance of the insertion tube of the cover, or the insertion length is too short. If crimping is carried out in this condition because it is easy to run out, many defective products will be produced and the yield will be poor.Furthermore, even if the products appear to be good, they are likely to cause problems such as poor conductivity during actual use. In particular, in recent years, with the aim of automating crimping work and improving productivity, continuous plug-in connector strips, in which multiple plug-in connectors are connected at regular intervals via narrow strips, have been used. However, a work style is adopted in which the material is continuously crimped while being automatically transferred and supplied to a crimping machine, and with the adoption of this work style, the above-mentioned defects are more likely to occur. It is in.

SUMMARY OF THE INVENTION In view of this situation, the present invention has an object to propose a method that can reliably and efficiently perform a desired crimp connection without making any improvements to the plug-in connector.

In order to achieve the above object, the present invention provides a crimp connection method for a plug-in connector and an electric wire, in which a crimping action section is provided at a location close to the crimp tube portion on the contact surface of the male tab terminal of the plug-in connector. A magnetic sensor is provided at an opposing position, and the die is automatically operated to perform crimping based on a signal from the sensor magnetically sensing the tip of the conductive wire inserted into the crimping tube. As a result, the following effects can be expected.

That is, the conductor at the end of the electric wire is automatically or manually inserted into the crimping cylinder part of the female terminal, and when the tip thereof protrudes from the crimping cylinder part, the magnetic sensor senses the magnetism more strongly than before, Due to the difference in magnetic sensitivity, an operation command signal is automatically output to the pair of dies. Therefore, it is possible to avoid as much as possible the conductor part at the end of the electric wire being crimped without being inserted into the crimping cylinder part or with the insertion length insufficient, and the occurrence of defective products due to this. , the desired crimp connection with good product yield,
And we were able to implement it with high productivity.

Examples of the method of the present invention will be described in detail below with reference to the drawings.

FIGS. 1 and 2 show a female flat plug-in connector 5 which is the object of crimp connection, and this is a transparent or translucent connector having a perfectly circular wire insertion tube 1A on one end side. A female terminal 2 is fitted and held on the other end side of the resin cover 1 so that its crimp tube portion 2A communicates with the wire insertion tube portion 1A.

As shown in FIG. 3, the plurality of plug-in connectors 5 are arranged in such a manner that the electric wire insertion tube portions 1A of each insulating cover 1 face in the same direction and open, and are spaced at a constant or almost constant interval. The above-mentioned electric wire insertion cylinder portions 1A in each are placed apart from each other.
In this case, the insulating cover 1 and the insulating cover 1 are connected in a band-like manner through a narrow and thin resin band-like piece 3 that is integrally molded.

After winding up the above-mentioned continuous plug-in connector strip into a roll, it is placed opposite to the cylindrical guide 16 and drive feed roll 7 of the automatic crimping machine 6 as schematically shown in FIG. The unit plug-in connectors 5 are sequentially fed between the pair of upper and lower crimping dies 9, 9' while being forcibly and automatically transferred along the guide rail 8 at a pitch corresponding to the adjacent spacing between the plug-in connectors 5. do.
Then, the crimping cylinder portion 2A of the female terminal 2 in the plug-in connector 5 supplied between the crimping dies 9 and 9'
Then, as shown in FIG. 5, the exposed bare wire portion 10a at the end of the electric wire 10 is automatically or manually inserted through the cylindrical portion 1A of the insulating cover 1. On this occasion,
By providing a magnetic sensor 11 in the crimping section at a position facing the male fanstone terminal abutment surface 2B of the plug-in connector 5 near the crimping tube portion 2A, the bare wire portion 10a is connected to the crimping tube. It passes through the portion 2A, and its tip touches the contact surface 2B.
When the magnetic sensor 11 detects the magnetic field more strongly than before, the sensing signal is transmitted to the control box 13 via the coaxial cable 12, and the dice are controlled based on the command output signal from there. The drive mechanism 14 (generally an air cylinder is used, but its specific structure is well known and will not be described here) is automatically operated to press the cylindrical portion 1A and the crimped portion by the dies 9 and 9'. The cylindrical portion 2A is plastically deformed (crimped), and the end portion 10a of the electric wire 10 and the female terminal 2 of the insertion connector 5 are electrically and physically crimped and connected. The strip 3 on the front and rear of the insulating cover 1 has blade edges 9a and 9a' formed on the front and rear of the insulating cover 1.
The separated strip 3 is collected by suction using a suction device 15, and this suction device 15 is installed at the location marked with * in FIG. 4.

Another practical example will be explained below.

(1) The narrow strip member 3 is best molded as a pair with the insulating cover 1 as in the above example, but it may also be connected using adhesive tape, for example. .

(2) The present invention also applies when crimping connection is performed by automatically and intermittently transferring and supplying individual plug-in connectors 5 to the crimping action section in an orderly manner without connecting the plug-in connectors 5 in a band shape. The method is valid.

[Brief explanation of drawings]

Figure 1 is a perspective view of a flat plug-in connector, Figure 2 is a vertical sectional view taken along the line of Figure 1, Figure 3 is a perspective view of a continuous plug-in connector band, and Figure 4 shows the crimp connection working state. FIG. 5 is a schematic side view and a schematic perspective view of the main parts showing the electric wire insertion situation. 2...Female terminal, 2A...Crimp tube part, 2B...
...Male tab terminal contact surface, 5...Plug-in connector, 9,
9'...Dice, 10...Electric wire, 11...Magnetic sensor.

Claims (1)

[Claims] 1 The conductive wire portion 10 at the end of the electric wire 10 is placed inside the crimp tube portion 2A of the female crimp terminal 2 of the flat plug-in connector 5.
A method of electrically and physically connecting the electric wire 10 and the plug-in connector 5 by crimping the crimping cylinder portion 2A by operating the pair of dies 9 and 9' with the wire 1 inserted. The plug-in connector 5 at the working part
A magnetic sensor 11 is provided at a position facing the male tab terminal abutment surface 2B near the crimp tube portion 2A, and the sensor 11 detects the tip of the conductive wire portion 10a inserted into the crimp tube portion 2A. A method for crimping and connecting a plug-in connector and an electric wire, characterized in that the dies 9, 9' are automatically activated to perform crimping based on a magnetically sensed signal.