JPH01209604A - Shielding wire and manufacture thereof - Google Patents

Abstract

PURPOSE:To improve a shape of an appearance and flexibility and to make it easy to dismantle and remove a cable by equalizing a twist direction and a twist pitch of an insulated conductor such as a pair twist core and a winding direction and a winding pitch of a metal laminated tape wound about the outer periphery. CONSTITUTION:A metal laminated tape 12 provided on the outer periphery of an insulated conductor 10 such as a pair twist core 11 is wound about in an equal direction and at an equal pitch to the twist direction and the twist pitch of the insulated conductor 10. Further, a metal laminated tape 14 provided on the outer periphery of an intertwisted core, in which plural insulated conductor intertwisted, is wound about in the equal direction and at the equal pitch to the intertwist direction and the intertwist pitch. Thereby, a shape of an appearance and flexibility is improved, further, dismantling and removal at the time connection can be easily performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a shielded electric wire and a method for manufacturing the same, and in particular, to a shielded electric wire and a method for manufacturing the same, in particular, the present invention relates to a shielded electric wire and a method for manufacturing the same.
The present invention relates to a shielded wire that facilitates disassembly during connection and improves productivity, and a method for manufacturing the same.

[Conventional technology]

The shielded wire is a cable suitable for internal wiring of a local area network (LAN) constituted by OA equipment such as computers. For example, this shielded wire is made by twisting two insulated wire cores in pairs to form a twisted pair core, and wrapping a metal laminate tape made of plastic and metal laminated around the outer periphery of the twisted pair core to form a wire core with a shielding layer. A plurality of these cores with shielding layers are twisted together, a drain wire and a metal laminate tape are wound around the outer periphery, and m! [Cables with an outer sheath made of paint, rubber, vinyl chloride, etc. are known (this type of cable is specified in IEEStd 802.3 (1983 edition)).

The metal laminate tape around the outer periphery of the twisted wire core of the shielded wire described above and the outer periphery of the twisted wire core made by twisting a plurality of wire cores with shielding layers is wound in the following manner.

(1) Method of winding a metal laminate tape around the outer circumference of a twisted pair core When twisting a pair of insulated wire cores or in a separate process, wind the metal laminate tape with the metal side facing outward, with a tape width of about 15 inches and an overlap of about 172 inches. The wire is wound at a pitch of about 301) to form a core with a shielding layer having an outer diameter of about 3.2φ.

(2) Method of wrapping a metal laminate tape around the outer periphery of a stranded wire core made by twisting together a plurality of wire cores with a shielding layer.A method of wrapping a metal laminate tape around the outer periphery of a stranded wire core made by twisting a plurality of wire cores with a shielding layer. Turn the metal side of the laminated tape outward, then fold one side edge of the metal side inward to create a tape with a width of about 30mm, an overlap of 1/4, and a winding pitch of about 100mm.
The wire is wound before and after the crane to form a twisted wire core with an outer diameter of approximately 6.5φ.

Further, another shielded wire is shown in Japanese Utility Model Publication No. 56-46495. This consists of a holding tape, a drain wire, and a metal laminated tape that are sequentially wrapped around the outer circumference of the twisted core.The holding tape is wrapped in the same direction and at the same pitch as the twisting direction of the twisted core, and the drain wire Twist the wires on the ramp-wound part of the holding tape in the same direction as the core.
And they are wound at the same pitch. On the other hand, the metal laminate tape is wound in a direction opposite to the direction in which the twisted core is twisted.

[Problem that the invention seeks to solve]

However, with conventional shielded wires, a metal laminate tape was wound in a separate process during or after the pair-twisting of the insulated wire cores. Because the metal laminate tape was wound in a separate process, the twisting direction and twisting pitch of the twisted pair core and multiple shielding layered wire cores were different from the winding direction and winding pitch of the metal laminate tape, resulting in a poor appearance. There is an inconvenience that the shape becomes uneven and cannot be covered even if an outer covering is applied. Furthermore, when connecting a cable to a connector or the like, it is troublesome to disassemble and remove the metal laminate tape, which is inconvenient and takes a lot of time. In addition, since the metal laminate tape is wound around the outer periphery of the twisted pair core, and the metal laminate tape is wound around the outer periphery of the twisted wire core formed by twisting the wire core with the shielding layer formed in this way, the winding This causes the disadvantage that each wire core is tightened and the flexibility of the cable is deteriorated.

Further, since the winding of the metal laminate tape was performed in separate steps for the twisted pair core and the twisted wire core, there was an inconvenience that the number of steps increased and productivity could not be improved.

Furthermore, the metal laminated tapes provided on the outer peripheries of the paired twisted wire core and the twisted wire core are in contact with the metal foil and the plastic surface, and are wound with a length greater than the core length of both cores. Therefore, the electrical resistance becomes large and there is a limit to the improvement of the shielding effect.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a shielded wire that has a good external shape and flexibility, and that facilitates disassembly and removal of the cable.

Another object of the present invention is to provide a method for manufacturing a shielded wire that achieves the above object while suppressing an increase in the number of steps and improves productivity.

[Means for solving problems]

The present invention has been made in view of the above, and in order to make the appearance of the wire smooth without reducing its flexibility, and to facilitate disassembly at the time of connection, the twist direction and A metal laminate tape that has the same twisting pitch and the same winding pitch of the metal laminate tape wound around its outer periphery, and that has the same twisting direction and twisting pitch of the insulated wire cores as well as the metal laminate tape that is wound around its outer periphery. To provide a shielded wire in which the winding direction and winding pitch are the same.

In addition, in order to manufacture the above-mentioned shielded wire without increasing the number of processes and improve productivity, by rotating a take-up rotation type twisting machine, twisted pair cores, etc. A shielded electric wire in which a metal laminate tape is wound around the outer periphery of an insulated wire core, a plurality of wire cores with shielding layers formed in this way are twisted together, and a metal laminate tape is wound around the outer periphery of the twisted wire core. The present invention provides a method for manufacturing.

That is, the shielded wire of the present invention includes the following means.

(1) A metal laminate tape wound around the outer periphery of an insulated wire core such as a twisted wire core.A shielding layer that is tape-wound around the outer periphery of a twisted wire core made by twisting two insulated wire cores together.

This is made by laminating plastic and metal foil, and when rolled, the metal side is placed on the outside. The winding direction and winding pitch of this metal laminate tape are the same as the twisting direction and twisting pitch of the insulated wire core.

(2) Metal laminate tape wrapped around the outer periphery of the twisted wire core This is a shielding layer that is wrapped with a tape around the outer periphery of the twisted wire core, which is made by twisting together insulated wire cores such as a plurality of twisted pair cores. When winding, the wire is wound with the metal surface on the outside, but one side edge of the metal surface is folded inward and wound so as to make contact with the metal surface wound around the outer periphery of the insulated wire core. The winding direction and winding pitch of this metal laminate tape are the same as the twisting direction and twisting pitch of the twisted wire core.

When producing the above-mentioned shielded wires, the wires are rotated while being taken up by a take-up/rotation type twisting machine, and the metal laminate tape, which is vertically laid over the untwisted twisted pair cores, is placed in a predetermined direction and in a predetermined direction. A plurality of wire cores with shielding layers are twisted together at a predetermined pitch in a predetermined direction, and a metal laminate tape is wound around the twisted wire core in a predetermined direction and at a predetermined pitch. For this reason,
The winding direction and winding pitch of the metal laminate tape, the twisting direction and twisting pitch of the insulated wire core, and the twisting direction and twisting pitch of the twisted wire core are the same.

[Effect]

The metal laminate tape provided around the outer periphery of an insulated wire core such as a twisted pair core is wound in the same direction and with the same pitch as the twisting direction and twist pitch of the insulated wire core. The metal laminate tape provided around the outer periphery of the twisted wire core is wound in the same direction and with the same pitch as the twisting direction and twisting pitch of the twisted wire core. Therefore, the external shape and flexibility are good, and it is also easy to disassemble and remove when connecting.

〔Example〕

Hereinafter, the shielded wire of the present invention and its manufacturing method will be explained in detail.

FIG. 1 shows an embodiment of the present invention, in which a plurality of twisted wire pairs 1
) is an insulated wire core 10 composed of a conductor and an insulator.
A metal laminate tape 12, which is twisted in pairs and laminated with plastic and gold foil on the outer periphery, is wound with the metal surface facing outward. A plurality of twisted pair cores 1) are twisted together, and a metal laminate tape 14 is similarly wound around the outer periphery with the metal surface facing outward and one side edge 14a of the metal surface, which will be described later, is folded inward. Ru. The metal laminate tape 12 and the metal laminate tape 14 are in contact with each other and electrically connected.

Furthermore, a braided shielding body 3 is provided on the outer periphery of the metal laminate tape 14.
The outer periphery of the braided shielding body 3 is covered with a jacket 2 made of rubber, vinyl chloride, or the like. A drain wire 13 is arranged around the outer periphery of the metal laminate tape 12, and is provided in the same twisting direction and twisting pitch as the twisted wire core made up of the plurality of twisted pair cores 1). This drain wire 13 further improves the shielding effect.

FIG. 2 shows a front exploded view of the shielded wire of the present invention, showing the metal laminate tape 1 wound around the outer periphery of the twisted wire core.
4 is folded back inward, and its winding direction and winding pitch are the same as the winding direction and winding pitch of the metal laminate tape 12 and the drain wire 13 wound around the outer periphery of the twisted pair core 10. are the same.

In the shielded wire having the above configuration, the direction and twisting pitch in which the two insulated wire cores are twisted in pairs are the same, and the winding direction and winding pitch of the metal laminate tape 12 wound around the outer periphery are the same, and , the direction and pitch in which the plurality of twisted wire core pairs 1) are twisted together, and the winding direction and pitch of the metal laminate tape 14 wound around the outer periphery thereof are also the same. As a result, the winding direction and winding pitch of the metal laminate tape 12 and the winding direction and winding pitch of the metal laminate tape 14 become the same. Therefore, flexibility is improved, and since the metal laminate tape is wound along the shape of the twisted insulated wire cores, unevenness caused by winding the tape is reduced, resulting in a smooth appearance. Can be done. Furthermore, when connecting connectors, etc., the winding direction and winding pitch of the metal laminate tape are the same as the winding direction and winding pitch of the twisted wire core, making it easy to disassemble and remove the cable. . Similarly, since the drain wire 13 is provided in the same direction and pitch as the twisted wire cores, it is placed along the recesses between the twisted wire cores (troughs created by twisting each wire core). Therefore, the provision of the drain wire 13 does not cause an uneven shape. Further, since the metal laminate tapes 12, 14 and the drain wire 13 are in electrical contact, a sufficient shielding effect can be obtained.

FIG. 3 shows a manufacturing apparatus according to the method of manufacturing a shielded wire according to the present invention, in which two twisted insulated wire cores 10 are wound around a bobbin which is twisted in a predetermined direction and at a predetermined speed. 21 , a bobbin 22 around which the drain wire 13 is wound and untwisted in the same direction and at the same speed as the bobbin 21 , around which the metal laminate tape 12 is wound, and the metal laminate tape 12 is wound vertically around the insulated wire core 10 . A tape bobbin 23 that is fed so as to be aligned therewith, and a die 30 that squeezes the insulated wire core 10 and the metal laminate tape 12 that is fed so that it is aligned vertically to form the shielding layer coated wire core 1).
and a plurality of shielding layered wire cores 1) are twisted together to form a twisted wire core, and the metal laminate tape 12 supplied longitudinally by untwisting the bobbin 21 is wound in a predetermined direction and at a predetermined pitch. and a twisting die 32 that also applies twist to the drain wire 13, a tape bobbin 24 around which the metal laminate tape 14 is wound and supplied to the twisted wire core, and a metal laminate supplied from the tape bobbin 24. A tape folding device 31 that folds one side edge 14a of the metal surface inward before feeding the tape 14 to the twisted wire core, and a metal laminated tape 14.
a wire fixing part 33 that fixes the twisted wire core 15 with the tape shielding layer wound thereon; a wire fixing section 33 that fixes the twisted wire core 15 with the tape shielding layer wound thereon; It has a winding device 35 that winds up the twisted wire core 15. Here, the collection device 34
The winding device 34 and the winding device 35 constitute a twisting machine, and the winding device 34 and the winding device 35 rotate in the same direction and at the same speed as the bobbins 21 and 22. For this reason, twisted pair core 1)
The winding direction and winding pitch of the metal laminate tape 12 wound around the outer periphery of the twisted wire core, the twisting direction and twisting pitch of the twisted wire core, and the metal laminate tape 14 wound around the outer periphery of the twisted wire core. The winding direction and winding pitch are the same. Further, the drain wire 13 is provided in a gap around the outer periphery of the twisted wire core so as to be the same as the twisting direction and the twisting pitch of the twisted wire core.

The method for manufacturing the shielded wire will be described below.

A plurality of insulated wire cores 10 and drain wires 13 each having two cores twisted in pairs are supplied from the bobbin 21 and 22 toward the twisting die 32 . On the other hand, the metal laminate tape 12 wound around the tape bobbin 23 is supplied vertically to each insulated wire core 10 in front of the die 30 with the metal surface facing outward, and the plurality of shielding layered wire cores 1) are Form. Wire core with each shielding layer 1)
In the twisting die 32, the metal laminate tapes 12 supplied vertically by untwisting the bobbin 21 are wound in a predetermined direction and at a predetermined pitch, and the winding direction of each metal laminate tape 12 is adjusted along with the drain wire 13. The wires are then twisted in the same direction and pitch as the winding pitch to form a twisted wire core. The twisted wire core is taken off by the take-off device 34, and the metal laminate tape 14 is supplied along the way. In this case, the metal laminate tape 14 is supplied from the tape bobbin 24 with its metal surface facing outward, and one side edge 14a of the metal surface is folded inward via the tape folding device 31. At this time, the take-up device 34 and the winding device 35 are rotating in the same direction and at the same speed as the aforementioned bobbins 21 and 22, so that the supplied metal laminate tape 14 has a metal laminate on the twisted wire core. tape 1
The tape is wound in the same direction and pitch as the winding direction and winding pitch of No. 2 and the twisting direction and twisting pitch of each of the shielding layer-attached wire cores to form a tape-shielding layer-attached stranded wire core 15. The twisted wire core 15 with tape shielding layer is taken up by the tape take-up device 34 via the wire fixing part 33 and wound up by the winding device 35 . Thereafter, a braided shield, a jacket, etc. are applied in a separate process to produce a shielded wire. Incidentally, the twisted pair core 1 wound around the bobbin 21
0 is twisted in pairs in advance in the same direction and pitch as the above-mentioned twisting direction and twisting pitch.

〔Effect of the invention〕

As explained above, according to the shielded wire and the manufacturing method thereof of the present invention, the twisting direction and twisting pitch of an insulated wire core such as a twisted pair core, and the winding direction and winding of a metal laminate tape wound around the outer periphery thereof can be adjusted. The pitch is the same, and
The twisting direction and twisting pitch of the twisted insulated wire core and the winding direction and winding pitch of the metal laminate tape wound around its outer periphery are made the same, resulting in a lack of flexibility in the wire. The appearance can be made smooth without any friction, and disassembly at the time of connection can be facilitated.

In addition, in the same process, a metal laminate tape is wound around the outer periphery of an insulated wire core such as a twisted pair core by the rotation of a take-up rotation type twisting machine, and multiple shielding layers formed in this way are wrapped. Since the wire cores are twisted together and a metal laminate tape is wound around the outer periphery of the twisted wire core, shielded wires can be manufactured without increasing the number of steps and productivity can be improved.

Furthermore, since the metal laminate tapes provided on the outer peripheries of the twisted wire core and the twisted wire core respectively have the same pitch as the twisting pitch of the image core, the length of both wire cores and the length between the two wires are equal to . Therefore, the electrical resistance of the metal laminate tape decreases accordingly, and the shielding effect improves.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention, FIG. 2 is an exploded front view of a shielded wire of the present invention, and FIG. 3 is an explanatory diagram showing a manufacturing apparatus for the method of manufacturing a shielded wire of the present invention. Explanation of symbols 1−・−・−・・−Shield electric wire 2−・−・−・
・Outer sheath 3---Braided shield 10---Insulated wire core 1)~・---1---Pair twisted wire core 12---
−・・−・−Metal laminate tape 13−・・−・・
・・Drain wire 14---Metal laminate tape 14a---One side edge 15 of metal laminate tape---Twisted wire core with tape shielding layer 2L 22 -------------- Bobbin 23
．． 24------- Tape bobbin 30...
・−・Dice

Claims (5)

[Claims] (1) Having a shielding layer around the outer periphery of an insulated wire core such as a twisted pair core,
In the shielded wire having another shielding layer on the outer periphery of the twisted wire core made by twisting a plurality of the insulated wire cores, the shielding layer provided on the outer periphery of the insulated wire core is a laminate tape of metal foil and plastic. The shielding layer is made of a metal foil and plastic laminate tape, which is wound in the same direction and with the same pitch as the twisting direction and twisting pitch of the insulated wire core, and the shielding layer provided on the outer periphery of the twisted wire core is a laminate tape of metal foil and plastic. What is claimed is: 1. A shielded wire comprising: a shielded wire, which is wound in the same direction and with the same pitch as the twisting direction and twisting pitch of the shielded wire. (2) The shielding layer provided on the outer periphery of the insulated wire core and the shielding layer provided on the outer periphery of the twisted wire core are in electrical contact with the drain wire located between them, and the 2. The shielded wire according to claim 1, wherein the wire is wound in the same direction and at the same pitch as both of the shielding layers. (3) The laminated tape wound around the outer circumference of the insulated wire core is wound with the metal surface facing outward, and the laminated tape wound around the outer circumference of the twisted wire core is wound with the metal surface facing outward. and is wound with one side edge of the metal surface folded inward, and is wound around the metal surface of the laminate tape wound around the outer periphery of the insulated wire core and around the outer periphery of the twisted wire core. 2. The shielded wire according to claim 1, wherein the metal surface folded back inside the laminate tape is in contact and conductive. (4) a step of supplying the insulated wire cores while untwisting them in a predetermined direction and at a predetermined speed to a plurality of bobbins around which insulated wire cores such as paired twisted wire cores are wound; manufacturing a wire core with a shielding layer by vertically supplying a laminate tape with the metal surface facing outward, and twisting a plurality of wire cores with a shielding layer in the predetermined direction and at the predetermined speed to produce the wire core with the shielding layer. A laminated tape is wound around the outer periphery of the insulated wire core in a predetermined direction and at a predetermined pitch, and at the same time, a plurality of the insulated wire cores are twisted in the same direction and pitch as the winding direction and winding pitch of the laminated tape. a step of manufacturing the twisted wire core; supplying a laminate tape with the metal surface facing outward and one side edge of the metal surface folded inward around the outer periphery of the twisted wire core; A method for manufacturing a shielded electric wire, comprising the step of winding the metal laminate tape in the same direction and pitch as the winding direction and winding pitch of the laminate tape. (5) The winding of the laminated tape provided around the outer periphery of the insulated wire core, the winding of the laminated tape provided around the outer periphery of the twisted wire core, and the twisting of the twisted wire core are performed on the twisted wire. 5. The method of manufacturing a shielded electric wire according to claim 4, wherein the method is carried out by rotating a taking-off means for taking off the core.