JPH11233230A - Terminal treatment method for multi-core cable - Google Patents

Abstract

(57) [Problem] To provide a terminal processing method of a multi-core cable which is excellent in workability and does not apply a large load to a wire core. SOLUTION: A plurality of strands 13 in which a conductor 11 is covered with an insulating layer 12 are converted into a first sliding layer 15 made of a metal braided wire.
A, and collectively cover them with a second sliding layer 15B also made of a metal braided wire, and further cover the outside thereof with an outer sheath 14 to form the multi-core cable 10. Then, in order to perform the terminal processing of the multi-core cable 10, the exposed length of the core 13 at one end thereof is set as a required work length L <b> 1, and the core 13 and the terminal fitting 22 are connected. It is slid by the sliding layers 15A and 15B and drawn into the outer sheath 14 to shorten the exposed length. This eliminates the need to bend the wire core 13 when assembling the terminal fitting 22 to the shield connector 20, thereby improving workability and preventing a large load from being applied to the wire core.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a multi-core cable terminal processing method.

[0002]

2. Description of the Related Art As an example of a multi-core cable, FIG. 12 shows a three-core multi-core cable having a shield layer. In this multi-core cable, three conductors 3 formed by covering a conductor 1 with an insulating layer 2 are collectively covered with an inner insulating layer 4, the outside thereof is covered with a shield layer 5, and the outside thereof is further covered with an outer sheath 6. It has a covered structure. As an example of the terminal processing of the multi-core cable, for example, there is a processing of attaching a shield connector 7 (see FIG. 13) to one end of the multi-core cable.
In this process, conventionally, each wire core 3 is exposed,
After connecting the terminal fitting 8 to the tip, the terminal fitting 8 is mounted in the shield connector 7 and the shield layer 5 of the multi-core cable is connected to a metal shell (not shown) provided inside the shield connector 7. Perform the procedure.

[0003]

By the way, at the time of the connection process to the terminal fittings 8 described above, in order to prevent the wire cores 3 from interfering with each other, the exposed portion of each wire core 3 is directly grasped and work is performed. Do. For this reason, it is necessary to expose the wire core 3 to some extent so that the wire core 3 can be gripped. However, when the wire core 3 is exposed for a long time, as shown in FIG.
The exposed portion of the wire core 3 must be forcibly bent and pushed into the shield connector 7, which is not preferable because the work is difficult and a large load is applied to the wire core 3.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a multi-core cable terminal processing method which is excellent in workability and does not apply a large load to a wire core.

[0005]

In order to achieve the above object, the invention according to claim 1 is directed to an end portion of a multi-core cable having a plurality of cores each having a conductor covered with an insulating layer inside an outer sheath. Thus, a multi-core cable end treatment method for connecting each core exposed from the outer sheath and a mating component, such that the outer sheath and the core slide in the axial direction with respect to each other. After having a structure with a sliding layer,
When connecting the wire core to the mating part, the wire core is exposed from the outer sheath to the required length of work required for the connection process, and the connection process is performed.Then, the wire core is slid on the sliding layer and inserted into the outer sheath. The feature is that it is drawn into the required minimum exposure length.

According to a second aspect of the present invention, in the multi-core cable terminal processing method according to the first aspect, the sliding layer includes a first sliding layer covering the outer peripheral surface of the insulating layer of each core, and the cores thereof. And a second sliding layer that collectively covers the second sliding layer.

A third aspect of the present invention is characterized in that, in the first or second aspect, the sliding layer is formed by a braided wire formed by knitting a metal wire in a stitch shape.

[0008]

According to the first aspect of the present invention, since the exposed length of the wire core at one end of the multi-core cable is set to the required work length, the connection process between the wire core and the mating component can be performed. The workability of the connection process is improved. On the other hand, in the post-process of the connection process, if the wire core is slid by the sliding layer and pulled into the outer sheath to shorten it, the exposed portion of the wire core does not become an obstacle. This eliminates the need to forcibly bend the exposed portion of the wire core and eliminates the need to apply a large load to the wire core.

According to the second aspect of the present invention, since the first and second sliding layers can slide with each other to shift the outer sheath and the wire core in the axial direction, slip resistance when the wire core is pulled in is reduced. It becomes smaller and workability is improved.

According to the third aspect of the present invention, since the sliding layer is formed of a braided wire formed by knitting a metal element wire in a stitch shape, a shielding effect that noise can be cut off by the sliding layer can be obtained. In addition, if both the first sliding layer and the second sliding layer are made of metal, they can easily slip with each other, which facilitates the work of drawing the wire core.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS <First Embodiment> A first embodiment of the present invention will be described below with reference to FIGS.
In the present embodiment, the present invention is applied to a process of attaching a shield connector to one end of a multi-core cable.

As shown in FIGS. 1 and 2, the multi-core cable 10 of the present embodiment includes three cores 13 each formed by covering a conductor 11 with an insulating layer 12, inside an outer sheath 14. In order to allow the wire core 13 and the outer sheath 14 to slide in the axial direction with respect to each other, a structure having a sliding layer 15 is provided. The sliding layer 15 is composed of a first sliding layer 15A covering the outer periphery of the insulating layer 12 of each wire core 13 and a second sliding layer 15B covering the wire cores 13 collectively.
Both of the sliding layers 15A and 15B are each formed of a braided wire formed by knitting a metal wire in a stitch shape.

The three cores 13 are twisted with each other.
The three move integrally within the outer sheath 14.

The shield connector 20 (see FIG. 7)
Are three cavities (not shown) capable of accommodating the terminal fitting 22 inside a connector housing 21 made of synthetic resin.
And a metal shell (not shown) surrounding the cavities collectively. The terminal fitting 22 has an insulation barrel 23 to which the insulating layer 12 of the wire core 13 is crimped at the rear end.
And a wire barrel 24 to which the conductor 11 exposed from the tip of the wire core 13 is crimped.

The multi-core cable 10 is processed as described below and attached to the shield connector 20. First, as shown in FIG. 3, the outer sheath 14 and the second sliding layer 15B are cut off at the end (the left end in FIG. 3) of the both ends of the multi-core cable 10 on the side where the shield connector 20 is attached. Then, the three wire cores 13 are exposed while being covered with the first sliding layer 15A. At this time, the exposed length of the wire core 13 from the end of the second sliding layer 15B is set to a relatively long required work length L1 in consideration of the next crimping step.
Then, at the end of each wire core 13, the first sliding layer 15A
Is cut out slightly to expose the insulating layer 12 of the wire core 13, and the insulating layer 12 is slightly cut out to expose the conductor 11. Further, in order to crimp a metal ring 16A described later on the second sliding layer 15B, the end of the outer sheath 14 is cut off to expose the end of the second sliding layer 15B.

On the other hand, at the opposite end of the multi-core cable 10, the outer sheath 14 and the second sliding layer 15B are cut off as shown in FIG. Leave it exposed. Also, the second sliding layer 15B
Is also exposed for caulking a metal ring 16B described later.

Next, as shown in FIG.
The step of crimping the terminal fitting 22 to one end of the “0” will be described. In this step, the terminal fitting 22 is attached to a crimping tool (not shown).
And the conductor 11 of the wire core 13 and the insulating layer 12 are crimped to both barrels 23 and 24 of the terminal fitting 22. At this time, since each wire core 13 is exposed by a relatively long required work length L1, the wire core 13 can be easily grasped, and work efficiency is high.

After crimping the terminal fitting 22 to the three cores 13, the core 13 is pulled while holding the outer sheath 14 at the end of the multi-core cable 10 on the opposite side. Then, as shown in FIG. 5, the first and second sliding layers 15A and 15B slide, and the outer sheath 14 and the wire core 13 are shifted from each other in the axial direction. Here, the first sliding layer 15A and the second sliding layer 15
Since both B are made of metal, they are in sliding contact with each other and have low frictional resistance, so that the operation of drawing in the wire core 13 can be easily performed. Then, the wire core 13 on the side where the terminal fitting 22 is fixed is provided.
Is drawn into the outer sheath 14, the exposed length L2 (see FIG. 5) of the wire core 13 is shortened, and
The exposed length L3 of the wire core 13 on the opposite side becomes longer.

Next, as shown in FIG. 6, the wire core 13 on the longer side is cut and the conductors 1 of those wire cores 13 are cut.
1 are exposed and put together, and for example, crimped to the round terminal 17. The metal rings 16A and 16B are crimped to the second sliding layer 15B exposed at both ends of the multicore cable 10.

Finally, the terminal fitting 22 at one end of the multi-core cable 10 is inserted into a cavity provided in the connector housing 21 of the shield connector 20. Then, as shown in FIG. 7, without bending the exposed portion of the wire core 13,
The end of the multicore cable 10 can be housed in the shield connector 20. Then, a portion of the multi-core cable 10 where the above-described metal ring 16 </ b> A is crimped is located in the connector housing 21 and comes into contact with the metal shell. Compared with the assembled state of the shielded connector by the conventional processing method, the workability is good because the work of bending the wire core 13 is not required, and the reliability of the connection is also small because a large force due to bending is not applied to the wire core 13. Get higher. Also,
Since the space for accommodating the bent portion of the wire core 13 is not required, there is also an effect that the shield connector 20 can be made smaller. Furthermore, in the multicore cable 10 of the present embodiment, since the sliding layer 15 is formed of a metal braided wire,
A shielding effect of blocking noise is also obtained. In addition, since this has a double structure of the first sliding layer 15A and the second sliding layer 15B, noise can be more reliably blocked.

The round terminal 17 and the metal ring 16B at the end of the multi-core cable 10 opposite to the side provided with the shield connector 20 are connected to a device (not shown).

<Second Embodiment> A second embodiment of the present invention will be described below with reference to FIGS. In the present embodiment, the present invention is applied to a process of attaching male and female shield connectors to both ends of the multi-core cable 10 having the same structure as the first embodiment. Hereinafter, the same configuration and the same steps as those in the first embodiment will not be described repeatedly, and only different configurations and procedures will be described.

The multi-core cable 10 is processed as follows and attached to the male and female shielded connectors. First,
As shown in FIG. 8, the outer sheath 14 and the second sliding layer 15B are cut off at both ends of the multi-core cable 10, and three wire cores 13 are covered with the first sliding layer 15A at both ends. The exposure length L4 is the same (see FIG. 8). In addition, the exposed length L4 is set to about half of the required work length L1 (see FIG. 9) required for the terminal fitting crimping step.

From this state, one end (the left end in FIG. 8) of the wire core 13 is pulled while holding the outer sheath 14 so that the exposed length is the required work length L required for the step of crimping the terminal fitting.
1 (see FIG. 9). At this time, wire core 13
Although the exposed length L5 at the other end of the line becomes short, it is exposed to the extent that the wire core 13 can be pulled toward the other end in a later step.

Then, a female terminal fitting 22 is crimped to the end of the long exposed wire core 13. At this time, each core 13
Is exposed by the required length L1, so that the crimping operation can be easily performed. Next, as shown in FIG.
Is pulled to the opposite side to the above case, and the opposite side wire core 13
Is set to the required working length L1, and a male terminal fitting 32 is crimped to each wire core 13. Also at this time, since each wire core 13 is exposed by the required work length L1, the crimping work is easy.

After the terminal fittings 22 and 32 are attached to both ends of the wire core 13, as shown in FIG. 11, both ends of the wire core 13 are returned to a state where they are uniformly exposed, and the second sliding layer 15B is formed.
The metal rings 16A and 16B are caulked and fixed to both ends of. Then, both ends are attached to male and female shield connectors (not shown) to complete the terminal processing.

As described above, according to the terminal processing method to which the present invention is applied, even when the shield connectors are attached to both ends, the wire core 13 can be exposed long at the time of the crimping operation of the terminal fittings. The same effects as those of the first embodiment can be obtained such as excellent.

<Other Embodiments> The present invention is not limited to the embodiments described above with reference to the drawings and drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition to the following, various changes can be made without departing from the scope of the invention. (1) Although the sliding layer 15 of the embodiment is configured by a braided wire, it may be configured by, for example, a copper tape. (2) The sliding layer 15 may be made of a material having a small frictional resistance even if it is not a metal. For example, the sliding layer 15 may be made of a fluororesin or paper. (3) Furthermore, in the above-described embodiment, two sliding layers (the first sliding layer 15A and the second sliding layer 15B) are provided, but a configuration having one of the sliding layers may be employed. (4) In the above-described embodiment, an example is shown in which the present invention is applied to the process of attaching the multi-core cable 10 to the shielded connector. Can also be applied.

[Brief description of the drawings]

FIG. 1 is a perspective view of a multi-core cable and terminal fittings according to a first embodiment.

FIG. 2 is a cross-sectional view of the multi-core cable.

FIG. 3 is a side view showing a state where a wire core is long exposed from one end of a multi-core cable.

FIG. 4 is a side view showing a state where a terminal fitting is crimped to one end of a multi-core cable.

FIG. 5 is a side view showing a state in which a wire core is long exposed from the other end of the multi-core cable.

FIG. 6 is a side view showing a state in which a round terminal is to be crimped to the other end of the multi-core cable.

FIG. 7 is a side view showing a state where one end of the multi-core cable is attached to a shielded connector.

FIG. 8 is a side view showing a state in which the cores are evenly exposed from both ends of the multicore cable according to the second embodiment;

FIG. 9 is a side view showing a state where a wire core is pulled out from one end of a multi-core cable and a terminal fitting is crimped thereto.

FIG. 10 is a side view showing a state where a wire core is pulled out from the other end of the multi-core cable and a terminal fitting is crimped thereto.

FIG. 11 is a side view showing a state in which the exposed lengths of the wire cores at both ends are evenly returned.

FIG. 12 is a perspective view showing a conventional multi-core cable.

FIG. 13 is a side view of a conventional multi-core cable subjected to terminal treatment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Multi-core cable 11 ... Conductor 12 ... Insulation layer 13 ... Wire core 14 ... Outer sheath 15 (15A, 15B) ... Sliding layer 22, 32 ... Terminal fitting (part mating part) L1 ... Required working length

Claims (3)

[Claims] 1. An end portion of a multi-core cable comprising a plurality of cores each having a conductor covered with an insulating layer inside an outer sheath,
A multi-core cable terminal processing method for connecting each core exposed from the outer sheath to a mating component, wherein the outer sheath and the core slide in the multi-core cable in the axial direction with respect to each other. In the structure having a sliding layer as described above, in connecting the wire core to a mating component, the wire core is exposed from the outer sheath to a required work length required for the connection process, and the connection process is performed. And thereafter, the wire core is slid on the sliding layer to be drawn into the outer sheath to have a required minimum length of the exposed length. 2. The method according to claim 1, wherein the sliding layer comprises a first sliding layer covering the outer peripheral surface of the insulating layer of each wire core, and a second sliding layer covering the wire cores collectively. The method for processing a multi-core cable according to claim 1. 3. The terminal treatment of a multi-core cable according to claim 1, wherein the sliding layer is formed of a braided wire formed by knitting a metal wire in a stitch shape. Method.