JPS59138080A - Terminal for twisted conductor cable and method of producingsame - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention consists in an electrical conductor, a method for producing the same, and the application of this method to the production of conductors with terminals or flaps.

The present invention relates to a strip-shaped terminal connector for electrical conductors, a method for producing these terminals, and the application thereof to the mass production of terminals or conductors equipped with flaps produced by this method.

The tubular terminal with insulating parts is disclosed in French Patent No. 14688.
No. 59 is well known. However, due to their design, these terminals cannot be manufactured automatically.

This type of terminal is satisfactory when used to connect the shift rate and the terminal by screwing, since the screw breaks the tubular portion and clamps the conductor together. However, when this is applied to connectors using elastic tightening,
These terminals are unsatisfactory, either because they are crimped into the connector by the previous crimping process or because they deform the tubular part due to elasticity, in which case the crimping is insufficient or otherwise It's not worth it. In the case of previous crimping, it is difficult to deform a portion of the tube without tearing it while tightening the twist connector sufficiently so that it is fully joined and yet partially fractured and deformed.

French Patent No. 2,468,224 discloses a method for manufacturing strip-shaped terminals, but automation of this method is difficult. This is because the sleeve of the terminal sleeve must be fitted onto the core and the insulating sheath and the strip portion connecting the several terminals must be integrally molded thereon.

The object of the invention is to overcome these drawbacks, to automate the production of strip-shaped terminals and to apply this to the mass production of conductors equipped with terminal strips or flaps.

In addition to the benefits of automation in the manufacture of terminals and lower manufacturing costs, twisted conductive cables are obtained which are cut to standard length and equipped with terminals at the ends. Therefore, since these terminals are used with elastically fastened connectors, the user does not have to crimp the terminals onto the conductive cable as in the past.

Furthermore, if the user wishes to crimp the terminals into a twisted cable, strip-shaped or strip-shaped terminals are supplied to the user if slacking is required.

Another object of the invention is that when manufacturing terminals from metal strips,
The object of the present invention is to provide a terminal that is delivered in strip form while reducing manufacturing costs.

A further object of the present invention is to provide a manufacturing method that uses as few parts as possible to obtain a strip-shaped terminal, and that reduces the number of steps and parts used as much as possible.

According to the present invention, a terminal for a stranded conductive cable, which is adapted to crimp a stranded conductive wire, has a shaped portion to be cut out from a metal strip having a rectangular body in the shape of a spout, and a plastic glue material formed therein. It is characterized by comprising a head having at least a square shape and a neck connecting the main body to the head.

The method of the invention applied to the production of a conductive cable equipped with a terminal further comprises the steps of fitting the conductive cable to the terminal and fastening the body to the multi-strand conductor.

Other advantages and features of the invention will become more apparent from the following description with reference to the accompanying drawings.

FIG. 1 shows a first embodiment of the terminal and different steps of the manufacturing method. As shown, the terminal is obtained from a conductive metal strip cut into the shape shown in step A of the method. This shape l has a rectangular main body 10 and a head 11 having a fishtail cutout 12.
In other words, this head is connected to the main body 10 by a neck 13. The entire cutout forming the terminal is connected to the edge of the metal strip 14 by a projection 15. The strip fed by hole 19 passes through a continuous working section which is subjected to operations B, C, D, E, F, G.

Once the resection is completed, the head 11 and the main body 10 are stamped into a square shape. This is the second step B of the method. During the next operation C, the head 11 is stamped into the shape shown in step C. It is made into a crown or split ring shape.

In the process, the strip material is introduced into a plastic molding machine which molds the insulating glass material 16 onto the head 11. That is, the head 11 is embedded and molded in the plastic material 16. Here, the terminal is in the form of a continuous strip, the protrusion 15 of which is cut off if it is desired to loosen the terminal.

As shown in FIG. 2, if multiple conductive cables 2 coated with an insulating sheath 20 are obtained, a final step E is added, in which terminals are attached to the ends of these cables.

This final step is step E shown in FIG. 3, in which the embedded molded terminal strip is shown, for example, in the processing section for attaching the composite stranded conductive cable 2.

As shown in FIG. 4, the conductive cable 2, which has already been cut to a standard length and has a bare end, has a sheath 20 located at a boss 1.61.
is fitted axially into the cylindrically shaped head until it abuts the cylindrically shaped head. Next, the twisted conductor 21 is crimped into a terminal in step F after facing the conductive portion of the main body 10.

The fact that the workpiece produced in each step is indicated for a single stamp does not exclude that several terminals may be cut, stamped, embedded or crimped at the same time in the method steps. . This also applies to the following explanation.

In step G, which is optional, the conductor with terminals is separated from the strip by cutting the protrusion 15.

During stage C, as shown in FIG.
degree angle, slightly opened. The bevel on the teeth 12 provides a better retention of the metal part of the terminal to the molded plastic material. As shown in FIG. 4, the embedding molded part 16 has a cylindrical part 164 with an inner boss 161 that secures the insulating sheath of the conductive cable, as well as a conical part 1 that guides the bald trimming.
63.

Optionally, a tongue is provided on the molding forming the hook 162 for receiving the reference indicia. Such tongues are known to those skilled in the art and have already been described in French Patent No. 1,468,859.

FIG. 5 shows a second embodiment of the terminal and different steps of the method.

In the first step A, a terminal is also formed on the dissimilar portion of the cut piece. In this figure, 12 indicates a retaining hole in the molded part, rather than a fishtail, as will be explained further below. The strip is sent to a processing station where part 1 is stamped to give it a square shape as shown in step B.

In the next processing section, each part or part assembly is subjected to a molding operation C on the whole or part of the head 1 using a plastic material.

In the next step, the conductive cable 2 with the exposed section 21 falls vertically into the thread of each component 1, so that the insulation section 20 of the cable coincides with the molded section 16 and the exposed section 18 coincides with the conductive portion 10 of the terminal.

This operation is followed by a crimping operation of one or several terminals, as shown in step E. In this operation, the metal part 1
0 is crimped into the conductor 21, while the molding grips the insulating sheath 20. Following this operation, an operation G (not shown) is performed to cut the protrusion 15.

In FIG. 6 an axial step is shown between section 11 and component 10, which is necessary to merge the axis of the conductive strands with the axis of insulating sheath 20. This stepped portion serves as a neck portion 13 that connects the main body 10 and the head portion 11 together during the punching operation B.
It can be obtained by transforming .

This figure also shows that the molded plastic material 16 is secured to the head of the hole 12. Button as mentioned above,
A tongue 162 can be provided which acts as an index holder.

Figure 7a shows a modification of the terminal obtained from the first embodiment, which has, in place of the tongue 162, a rectangular opening 165 for fixing a label-holding tongue (not shown) of the type described above.

FIGS. 8 to 11 show various applications of the terminal obtained by the second embodiment, in which a one-piece or vertical-piece terminal is obtained.

In these types of applications as well, the terminal consists of various constituent parts of the molded part 16, the crimped part 10, and the neck part 13 (not shown) that joins the two parts 1-6, 10 together.
Parts 31, 32, 33 forming hanging pieces connecting the crimped parts
or by a second neck portion 3o joining to 34. As shown in FIGS. 8 to 11, this joining vertical piece may have any shape that allows for desired fixation and connection.

The hanging pieces 31, 32 are screwed, while the hanging pieces 33, 34, known as "fixations", are connected by flanges.

The shape of the hanging pieces 31 , 32 , 33 , 34 is obtained during the manufacturing process by cutting and bending the metal strips and is connected to the strips by tongues 15 . The same method of manufacturing terminals that are serially attached to standard length conductive cables applies to hanging strip terminals. In the manufacturing operation, along with the operation of making a mold into a vertical piece,
A second neck portion 30 and a second main body 31 , 32 .

33 and 34 may be performed.

The embedding molded part is also provided with label holding means.

These various application examples of the terminal are also applied to the terminal obtained by the first embodiment. In this case, instead of obtaining a spout-shaped embedded molded element, the embedded molded part is cylindrical as in the process of FIG. The other parts 31-34 are identical and are connected to the crimping part by a neck 30.

During the cutting operation, all the molded parts 16 can be joined together with rods or strips, and after cutting the protrusions 15,
The strip terminals are connected together by molded parts, as is known from French Patent No. 2,468,224.

It will be appreciated that other modifications and changes will occur to those skilled in the art without departing from the scope and spirit of the invention.

[Brief explanation of drawings]

Fig. 2 shows different steps in the method for manufacturing the first embodiment of the terminal, Fig. 2 is a perspective view of the conductive cable with the terminal attached, and Fig. 3 shows the steps in the method for obtaining the product of Fig. 2. shows,
FIG. 4 shows a sectional view of the terminal according to the first embodiment, FIG. 5 shows each step of the method for manufacturing the second embodiment of the terminal, and FIG. 6 shows a sectional view of the terminal according to the second embodiment. Figures 7a and 7b are perspective views of the terminal according to the second method of fixing the label holder, and Figures 8 to 11 show examples of various applications of the terminal, and examples of terminals with hanging or shielded terminals. The manufacturing method is shown below. Explanation of symbols of main parts 1... Shape part 2... Cable 10.
...Body 11...Head 13, 30
...Neck 14...Metal strip 15...
Projecting part 16...Glass material 17...
Exterior 31-34... hanging piece 161.
・Boss 163・・Conical part 164・
・Cylindrical partial agent Motohiko Fujimura, patent attorney

Claims (9)

[Claims] (1) A terminal for a twisted conductive cable (2) adapted to crimp a twisted conductor, which is cut from a metal strip (14) having a rectangular body (10) formed in the shape of a square. The head part (11) is embedded in a plastic material (16) and has at least a spout shape, and the neck part (13) connects the main body to the head part. terminal. (2) The resection shape portion (1) is connected to the first neck portion (30) by the second neck portion (30).
Hanging pieces (31, : 32, 33 connected to the main body (10)
. 34) The terminal according to claim 1, characterized in that it comprises a second body having a shape of 34). (3) The head (11) is made of embedded plastic material (16)
Terminal according to claim 1 or 2, characterized in that it has means (12) for retaining. (4) Any one of claims 1 to 3, characterized in that the neck (13) has a set pack that aligns the symmetry axes of the main body (10) and the head (11).
Terminals listed in section. (5) The embedding molded part of the head has several bosses (161
), which is followed by a conical part (163) shaped into a fishtail cutout. The terminal described in any one of the items. (6) A method for manufacturing a terminal according to one of the above claims, comprising: a head (11), at least one neck (13), at least one body (10) and a protrusion ( 15), and the protrusion (15) allows the metal strip (1
4) the continuous shape is joined to the metal strip (14)
cutting out the plastic material (16); forming the main body (10) into a spout shape; forming at least the head (11) into a spout shape; and cutting the plastic material (16) into the head (1).
1) A method for manufacturing a terminal according to any one of claims 1 to 5, characterized in that the method includes the step of forming. (7) Head (11), first neck (13), first body (10), second neck (30), second body (31°3
2 , 33 , 34 ) and a protrusion (15),
Cutting out a continuous shape from the metal strip (14), which is connected to the metal strip by a protrusion (15);
Step of forming the head (11, 34) into a vertical piece shape;
Terminal according to claim 2 or 5, characterized in that the terminal comprises the steps of: forming the head (11) into at least a square shape; and forming the plastic material into the head (11). manufacturing method. (8) The method according to claim 6 or 7, characterized in that a cylindrical-conical shape is provided by the step of forming the head. (9) The process of fitting the conductive cable (2) into the terminal and the process of crimping the main body (10) onto the straightened conductor (21) are as follows: A method for manufacturing a conductive cable with a terminal to which the method according to paragraph 7 is applied. Claim 9, characterized in that it further comprises the step of crimping the embedded molded head in the insulating sheath (17) of the cable, used when the head is in the form of a spout. Method.