JP2008117619A - Composite cable, and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composite cable in which a metal cable is easily separated from an optical indoor cable, and easiness of taking out the insulated wire of the metal cable can be maintained, and the manufacturing cost of which is reduced. <P>SOLUTION: This composite cable 1 includes the metal cable 2 and the optical indoor cable 3. The metal cable 2 includes insulated wires 8, 9, strings 10, 11, and a tape 12. The insulated wires 8, 9 and the strings 10, 11 are stranded and the tape 12 is wound around them. The optical indoor cable 3 includes an optical core wire 21 and tension members 22, 23. A metal cable side coating 31 covering the periphery of the tape 12, and an optical indoor cable side coating 32 covering the periphery of the optical fiber core wire 21 and the tension members 22, 23 are simultaneously formed by pressure molding, and the metal cable 2 is integrated with the optical indoor cable 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a composite cable in which a metal cable for an optical telephone and an optical indoor cable are integrated, and a method for manufacturing the composite cable.

  Conventionally, when a new optical indoor cable is wired to a subscriber's home of an optical telephone, it is necessary to separately lay the metal cable for the telephone and the optical indoor cable. For example, as shown in FIG. 9, when the telephone 100 and the PC (personal computer) 101 are on different floors, the optical indoor cable 102 is wired from the optical connector cabinet in the case 103 to the PC 101 via the ONU and the metal. It is necessary to wire the cable 104 from the PC 101 to the telephone (dedicated IP telephone) 100. Alternatively, when the telephone is a general telephone, it is necessary to wire the metal cable 104 from the VoIP adapter (converter) to the telephone.

  Reference numeral 105 denotes a metal cable wired from the protector in the case 103 to the telephone 100. In FIG. 9, reference numeral 110 denotes an optical cable lead-in line, and reference numeral 111 denotes a metal cable lead-in line. The optical cable lead-in wire 110 is connected to the optical indoor cable 102 by an optical connector cabinet in the case 103, and the metal cable lead-in wire 111 is connected to the metal cable 105 by a protector in the case 103.

Conventionally, a composite cable in which a copper wire and an optical fiber are accommodated in a jacket is known (for example, see Patent Document 1).
JP 2004-201447 A

  By the way, in the composite cable described in the said patent document 1, there existed a problem that the metal cable which has a copper wire, and the optical indoor cable which has an optical fiber cannot be isolate | separated, unless a jacket is stripped off using a tool.

  In general, a conventional metal cable has an insulating wire in which a plurality of copper wires are coated with an insulator, and a resin is formed in a tube shape to form a jacket so that the jacket and the inner insulated wire are connected to each other. It prevents fusion and keeps the insulated wire. In general, a conventional optical indoor cable has an optical fiber core or an optical fiber tape core and a tension member inside, and a jacket covering the periphery thereof is formed by press molding a resin.

  As described above, the conventional metal cable and the conventional optical indoor cable form the jacket by a method in which the flow of the resin is different. For this reason, the metal cable and the optical indoor cable could not be manufactured at the same time while preventing the fusion of the jacket (cover) and the insulated wire in the metal cable and maintaining the take-out property of the insulated wire.

  The present invention has been made in view of the above-described conventional problems, and the object thereof is a composite in which separation of a metal cable and an optical indoor cable is easy, the insulation property of the metal cable can be taken out, and the manufacturing cost is reduced. It is to provide a method for manufacturing a cable and a composite cable.

  In order to solve the above problems, a composite cable according to a first aspect of the present invention includes at least one pair of insulated wires each having a conductor covered with an insulator, and a tape wound around the at least one pair of insulated wires. A metal cable side coating covering the periphery of the tape, an optical fiber core wire or an optical fiber tape, and an optical indoor cable having an optical fiber core wire or an optical fiber tape core wire and a tension member. The gist is that the core and the optical indoor cable side covering covering the periphery of the tension member are integrated by pressure molding.

  According to this aspect, since the metal cable has at least one pair of insulated wires wound with tape, the metal due to the heat of the pressure resin when the metal cable side coating and the optical indoor cable side coating are pressure-molded Fusion of the cable side sheath and the insulated wire is prevented. As a result, it is easy to take out the insulation wire that peels off the metal cable side coating and exposes the internal insulation wire. That is, it is possible to maintain the take-out property of the insulated wire of the metal cable.

  Further, since the metal cable and the optical indoor cable can be manufactured at the same time while maintaining the take-out property of the insulated wire, the manufacturing cost can be reduced.

  In addition, since the metal cable and the optical indoor cable are connected via a connecting portion that can be formed by integrating the metal cable side coating and the optical indoor cable side coating by pressure molding, both cables can be simply torn. Can be easily separated.

  Further, the optical indoor cable is integrated with the metal cable in a state where the optical fiber core wire or the optical fiber tape core wire and the tension member are covered with the optical indoor cable side coating. In other words, the optical indoor cable integrated with the metal cable has the same structure as the above-described general conventional optical indoor cable, and in order to be integrated with the metal cable, a tube-like structure is provided separately from the optical indoor cable side coating. There is no need to form a special jacket. This eliminates the need for a process for forming a tube-shaped jacket, which can reduce the manufacturing cost and, at the time of exposing the optical fiber core or the optical fiber ribbon, to the outside. The work of removing the film becomes unnecessary.

  Therefore, the metal cable and the optical indoor cable can be easily separated, and the insulated wire can be easily taken out from the metal cable, so that a composite cable with reduced manufacturing costs can be obtained.

  The composite cable according to another aspect of the present invention is characterized in that the at least one pair of insulated wires are twisted together, and the tape is wound around a single wire formed by twisting the insulated wires. And According to this aspect, the insulating wire take-out property from the metal cable is improved.

  In the composite cable according to another aspect of the present invention, at least one cord is disposed between the at least one pair of insulated wires in the metal cable, and the cord and the insulated wires are twisted together. It is summarized as being wound with the tape. According to this aspect, it is possible to improve the take-out property of the insulated wire from the metal cable and to make the cross-sectional shape of the metal cable close to a circle.

  The gist of the composite cable according to another aspect of the present invention is that the insulator is formed of a high-density insulating material. According to this aspect, the fusion of the metal cable side coating and the insulation wire due to the heat of the pressure resin is further prevented, and the take-out property of the insulation wire from the metal cable is further improved.

Here, “high density” refers to a density in the range of 0.941 to 0.965 g / m ² . The “low density” refers to a density within a range of 0.910 to 0.925 g / m ² . For example, polyethylene (PE) is used as the insulating material.

  In the composite cable according to another aspect of the present invention, the optical fiber core wire or the optical fiber tape core wire is disposed in a central portion of the optical indoor cable side coating, and the optical indoor cable side coating The gist is that a notch for tearing the coating and exposing the optical fiber core or the optical fiber ribbon to the outside is formed along the longitudinal direction.

  According to this aspect, the optical fiber core wire or the optical fiber tape core wire is exposed by tearing the optical indoor cable side coating at the notch portion in a state where the metal cable and the optical indoor cable are separated. Thereby, also in the composite cable which integrated the metal cable and the optical indoor cable, the optical fiber core wire or the optical fiber tape core wire can be easily exposed to the outside like the conventional optical indoor cable.

  The composite cable according to another aspect of the present invention is characterized in that the metal cable side coating is formed with a notch for tearing the coating and exposing the tape to the outside along the longitudinal direction. To do. According to this aspect, the inner insulated wire can be easily exposed to the outside by tearing the metal cable side coating at the cutout portion.

  In the composite cable according to another aspect of the present invention, the at least one pair of insulated wires or the at least one pair of insulated wires and the string are twisted on the surface of the metal cable side coating. The gist of the present invention is that the periodic unevenness formed by the outer shape of each is formed along the longitudinal direction.

  According to this aspect, since the periodic unevenness is formed along the longitudinal direction on the surface of the metal cable side coating, when the metal cable and the optical indoor cable are separated and each cable is connected to the counterpart, respectively. The metal cable having periodic irregularities on the surface and the optical indoor cable having no irregularities can be easily discriminated by the touch of the finger even in a dim place.

  The method of manufacturing a composite cable according to the second aspect of the present invention includes a step of winding a tape around at least one pair of insulated wires each covering a conductor with an insulator, a metal cable side coating covering the periphery of the tape, And a step of integrating the optical fiber cable core or the optical fiber tape core and the optical indoor cable side covering covering the periphery of the tension member by pressure molding.

  According to this aspect, since the metal cable side coating and the optical indoor cable side coating are integrated by pressure molding in a state where the tape is wound around at least one pair of insulated wires, the metal cable side by the heat of the pressure resin is integrated. Fusing between the covering and the insulated wire is prevented. Thereby, the take-out property of the insulated wire from the metal cable can be maintained. Further, since the metal cable and the optical indoor cable can be manufactured at the same time while maintaining the take-out property of the insulated wire, the manufacturing cost can be reduced. In addition, the two cables can be easily separated by simply tearing the connecting portion formed by pressure molding. Furthermore, since the optical indoor cable integrated with the metal cable is integrated with the metal cable, it is not necessary to form a tube-shaped outer cover separately from the optical indoor cable side coating. This eliminates the need for a step of forming a tube-like outer cover, and can reduce the manufacturing cost accordingly. Therefore, it is easy to separate the metal cable and the optical indoor cable, and it is possible to obtain a composite cable that can maintain the take-out property of the insulated wire of the metal cable and reduce the manufacturing cost.

  The gist of a method of manufacturing a composite cable according to another aspect of the present invention includes a step of twisting the at least one pair of insulated wires, and winding the tape around a linear body formed by twisting the insulated wires. . According to this aspect, the insulating wire take-out property from the metal cable is improved.

Embodiments embodying the present invention will be described with reference to the drawings. In the description of each embodiment, similar parts are denoted by the same reference numerals, and redundant description is omitted.
(First embodiment)
The composite cable 1 according to the first embodiment will be described with reference to FIGS.
FIG. 1 is a cross-sectional view showing a schematic configuration of the composite cable 1, and is a cross-sectional view taken along the line AA of FIG.

  FIG. 2 is a photograph showing a cross section of the composite cable 1 actually manufactured. 3 is a plan view showing a part of the long composite cable 1, and FIG. 4 is an enlarged plan view showing a part of the composite cable 1. As shown in FIG.

  As shown in FIGS. 1 and 3, the composite cable 1 is obtained by integrating a metal cable 2 and an optical indoor cable 3.

  The metal cable 2 includes a pair of insulated wires 8 and 9 in which conductors 4 and 5 are covered with insulators 6 and 7, respectively, cords 10 and 11 disposed between the insulated wires 8 and 9, tape 12, Is provided. The pair of insulated wires 8 and 9 and the two strings 10 and 11 are twisted together and wound with a tape 12.

The material of the conductors 4 and 5 is, for example, an annealed copper wire. The material of the insulators 6 and 7 is, for example, polyethylene (PE). The insulators 6 and 7 are formed of a high-density insulating material (for example, PE) within a range of 0.910 to 0.925 g / m ² .

  The material of the strings 10 and 11 is, for example, Tetron. The tape 12 is made of a thin and strong material, for example, Japanese paper such as crusted paper. In this way, by using a tape 12 that is easy to tear, such as a striped paper, when the metal cable side coating 31 is torn, the tape 12 sticks to the metal cable side coating 31 and is torn off. become.

  The optical indoor cable 3 includes an optical fiber core wire 21 and tension members 22 and 23. The optical fiber core 21 includes a glass optical fiber 24 composed of a core and a clad, and a coating layer 25.

  The metal cable side coating 31 covering the periphery of the tape 12 and the optical indoor cable side coating 32 covering the periphery of the optical fiber core wire 21 and the tension members 22 and 23 are simultaneously formed by pressure molding (pressure extrusion molding). The metal cable 2 and the optical indoor cable 3 are integrated.

  The optical fiber core wire 21 is disposed at the center of the optical indoor cable side coating 32. On both sides of the optical indoor cable side coating 32 in the thickness direction, notches 41 and 42 for tearing the coating and exposing the optical fiber core wire 21 to the outside are formed along the longitudinal direction.

  Further, the metal cable 2 and the optical indoor cable 3 are connected via a connecting portion 33 (see FIG. 3) in which the metal cable side coating 31 and the optical indoor cable side coating 32 are integrated by pressure molding.

  And, on the surface of the metal cable side coating 31 of the metal cable 2, as shown in FIG. 4, a pair of insulated wires 8, 9 and a single filament formed by twisting two strings 10, 11 are formed. Periodic irregularities formed by the outer shape are formed along the longitudinal direction.

  Next, an example of a method for manufacturing the composite cable 1 will be briefly described.

  The manufacturing method of the composite cable 1 includes the following steps.

  A process of twisting a pair of insulated wires 8 and 9 and two cords 10 and 11 together.

  A step of winding a tape 12 around a pair of insulated wires 8 and 9 and two strings 10 and 11 twisted together.

  A step of integrating the metal cable side coating 31 covering the periphery of the tape 12 and the optical indoor cable side coating 32 covering the periphery of the optical fiber core wire 21 and the tension members 22 and 23 by pressure molding.

  A cross section of the composite cable 1 actually manufactured by this manufacturing method is shown in the photograph of FIG. From this photograph and FIG. 1, the tape 12 wound around the pair of insulated wires 8 and 9 and the two cords 10 and 11 is paired with the pair of insulated wires 8, 9 and 2 by the pressure of the resin at the time of pressure molding. It turns out that it adheres to the outer peripheral surface of the string 10 and 11 of a book.

  FIG. 7 is an explanatory diagram when the composite cable 1 according to the present embodiment is newly wired to the subscriber's home of the optical telephone. When a new optical indoor cable is wired to a subscriber's home of an optical telephone, the composite cable 1 only needs to be wired between the optical connector cabinet and the protector in the case 103 and the PC 101.

  One end side of the optical indoor cable 3 of the composite cable 1 is connected to the optical cable lead-in line 110 by an optical connector cabinet in the case 103, and the other end side is wired to the PC 101 via an ONU or the like. On the other hand, one end side of the metal cable 2 of the composite cable 1 is connected to the metal cable 105 by a protector in the case 103, and the other end side is wired to the PC 101.

According to 1st Embodiment which has the above structure, there exist the following effects.
In the case of the metal cable 2, since the tape 12 is wound around the pair of insulated wires 8, 9 and the two cords 10, 11, the metal cable side coating 31 and the optical indoor cable side coating 32 are pressure-molded. At this time, the fusion of the metal cable side coating 31 and the insulated wires 8 and 9 due to the heat of the pressure resin is prevented. As a result, as shown in FIG. 6, it is easy to take out the insulating wire that peels off the end portion of the metal cable side coating 31 to expose the internal insulating wires 8 and 9. That is, it is possible to maintain the take-out property of the insulated wire of the metal cable 2.
○ The metal cable 2 and the optical indoor cable 3 are manufactured at the same time while maintaining the takeout property of the metal cable 2 by integrally forming the metal cable side coating 31 and the optical indoor cable side coating 32 by pressure molding. Therefore, the manufacturing cost of the composite cable 1 can be reduced.
○ Since the metal cable 2 and the optical indoor cable 3 are connected via a connecting portion 33 formed by integrating the metal cable side coating 31 and the optical indoor cable side coating 32 by pressure molding, the connecting portion 33 is As shown in FIG. 5, both cables 2 and 3 can be easily separated by simply tearing them by hand.
The optical indoor cable 3 is integrated with the metal cable 2 with the optical fiber core wire 21 and the tension member covered with the optical indoor cable side coating 32. That is, the optical indoor cable 3 integrated with the metal cable 2 has the same structure as the above-described general conventional optical indoor cable, and the optical indoor cable side covering 32 is integrated with the metal cable 2. There is no need to specially form a tubular outer jacket. As a result, the step of forming the tube-shaped jacket becomes unnecessary, and the manufacturing cost can be reduced correspondingly, and when the optical fiber core wire 21 is exposed to the outside, the operation of removing the tube-shaped jacket is also performed. It becomes unnecessary.
The separation of the metal cable 2 and the optical indoor cable 3 is easy, the take-out property of the insulated wires 8 and 9 of the metal cable 2 can be maintained, and the composite cable 1 with a reduced manufacturing cost can be obtained.
○ A pair of insulated wires 8 and 9 and two cords 10 and 11 are twisted together, and tape 12 is wound around one wire formed by twisting them together. The take-out property of the insulated wires 8 and 9 is improved, and the cross-sectional shape of the metal cable can be made close to a circle.
○ Since the insulators 6 and 7 of the pair of insulated wires 8 and 9 are formed of a high-density insulating material (for example, PE) within a range of 0.910 to 0.925 g / m ² , the heat of the pressure resin Fusion of the metal cable side coating 31 and the insulated wires 8 and 9 is further prevented, and the take-out property of the insulated wire of the metal cable 2 is further improved.
The optical fiber core wire 21 is disposed at the center of the optical indoor cable side coating 32. The optical indoor cable side coating 32 is cut to tear the coating to expose the optical fiber core wire 21 to the outside. The notches 41 and 42 are formed along the longitudinal direction. For this reason, the optical fiber core wire 21 is exposed by tearing the optical indoor cable side coating 32 at the cutout portions 41 and 42 in a state where the metal cable 2 and the optical indoor cable 3 are separated. Thereby, also in the composite cable 1 which integrated the metal cable 2 and the optical indoor cable 3, the optical fiber core wire 21 can be easily exposed outside like the conventional optical indoor cable.
○ Since the surface of the metal cable side coating 31 has periodic irregularities (see FIG. 4) formed along the longitudinal direction, the metal cable 2 and the optical indoor cable 3 are separated and the cables 2 and 3 are connected to each other. When connecting to each other, the metal cable 2 with periodic unevenness on the surface and the optical indoor cable 3 without unevenness can be easily discriminated even in a dim place with finger touch.
○ When a new optical indoor cable is wired to a subscriber's home of an optical telephone, the composite cable 1 may be wired between the optical connector cabinet and protector in the case 103 and the PC 101 as shown in FIG. 9, there is no need to wire the metal cable 104 from the PC 101 to the telephone 100 as in the conventional example shown in FIG. Therefore, by using the composite cable 1 according to the present embodiment, the wiring of the metal cable 104 shown in FIG. 9 can be omitted, and the construction can be simplified.
(Second Embodiment)
FIG. 8 is a cross-sectional view showing a schematic configuration of the composite cable 1A according to the second embodiment.

  In this composite cable 1A, in the composite cable 1 according to the first embodiment, the metal cable side coating 31 is provided with notches 35 and 36 for tearing the coating and exposing the tape 12 to the outside along the longitudinal direction. Is formed. Other configurations are the same as those in the first embodiment.

According to 2nd Embodiment which has the above structure, in addition to the effect which the said 1st Embodiment show | plays, there exist the following effects.
O By tearing the metal cable side coating 31 at the locations of the notches 35 and 36, the internal insulated wires 8 and 9 can be easily exposed to the outside.

In addition, this invention can also be changed and embodied as follows.
In each of the above embodiments, the tape 12 is made of Japanese paper such as cinnamon paper. However, the tape 12 is not limited to Japanese paper, and is a non-woven fabric made of a thin and strong material such as PET (polyethylene terephthalate) resin. Also good.
In each of the embodiments described above, the composite cables 1 and 1A in which the optical indoor cable 3 having the single optical fiber core 21 and the metal cable are integrated have been described. However, the present invention is not limited to such a configuration. For example, a composite cable in which a metal cable is integrated with an optical indoor cable 3 having a configuration having a plurality of optical fiber cores or a configuration having optical fiber tape cores in which a plurality of optical fiber cores are arranged in one or a plurality of rows The present invention is also applicable.
In each of the above embodiments, the composite cable in which the metal cable 2 having the pair of insulated wires 8 and 9 and the two cords 10 and 11 and the optical indoor cable 3 are integrated has been described. It is not limited to the configuration. For example, the present invention is also applied to a composite cable in which a metal cable 2 and an optical indoor cable 3 having a structure having only a plurality of pairs of insulated wires or a structure having a plurality of pairs of insulated wires and one or a plurality of strings are integrated. Applicable.
In each of the above embodiments, the metal cable 2 has a circular cross section, but the cross sectional shape is not limited to a circle, and may be a rectangle or an ellipse.
In each of the above embodiments, the optical indoor cable 3 has a rectangular cross section, but the cross sectional shape is not limited to a rectangle, and may be an oval or a circular shape.
The shape, size, depth, etc. of the notches 41 and 42 in the composite cable 1 of the first embodiment and the notches 35 and 36 in the composite cable 1A of the second embodiment are shown in FIGS. The present invention is not limited to the configuration shown in FIG. 8 and can be applied to a composite cable having a configuration in which the shape, size, and the like are appropriately changed.

Sectional drawing which shows schematic structure of the composite cable which concerns on 1st Embodiment of this invention. A photograph showing a cross section of a composite cable actually manufactured. The top view which shows a part of elongate composite cable. The top view which expanded and showed a part of composite cable 1. FIG. The top view which shows the state which torn the edge part of a metal cable and an optical indoor cable. The top view which shows the state which exposed the insulated wire inside a metal cable outside. Explanatory drawing in the case of wiring the composite cable 1 which concerns on 1st Embodiment to a subscriber's house. Sectional drawing which shows schematic structure of the composite cable which concerns on 1st Embodiment of this invention. Explanatory drawing in the case of wiring to a subscriber's house in a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A ... Composite cable, 2 ... Metal cable, 3 ... Optical indoor cable, 4, 5 ... Conductor, 6, 7 ... Insulator, 8, 9 ... Insulated wire, 10, 11 ... String, 12 ... Tape, 21 ... Optical fiber core wire, 22, 23 ... Tension member, 24 ... Glass optical fiber, 25 ... Coating layer, 31 ... Metal cable side coating, 32 ... Optical indoor cable side coating, 33 ... Connecting portion, 35,36 ... Notch , 41, 42 ... notches.

Claims (9)

A metal cable having at least one pair of insulated wires each covering a conductor with an insulator, and a tape wound around the at least one pair of insulated wires;
An optical indoor cable having an optical fiber core or an optical fiber tape core and a tension member;
The metal cable side coating covering the periphery of the tape and the optical indoor cable side coating covering the periphery of the optical fiber core wire or the optical fiber tape core wire and the tension member are integrated by pressure molding. Composite cable.   2. The composite cable according to claim 1, wherein the at least one pair of insulated wires are twisted together, and the tape is wound around one wire formed by twisting the insulated wires. At least one cord is arranged between the at least one pair of insulated wires in the metal cable, and the cord and the insulated wires are twisted together and wound with the tape. The composite cable according to claim 2 or 3.
  The composite cable according to claim 1, wherein the insulator is made of a high-density insulating material.   The optical fiber core wire or the optical fiber tape core wire is disposed at a center portion of the optical indoor cable side coating, and the optical fiber core wire or optical fiber is formed by tearing the coating on the optical indoor cable side coating. The composite cable according to any one of claims 1 to 4, wherein a notch for exposing the tape core wire to the outside is formed along a longitudinal direction.   The metal cable side coating is formed with a notch for tearing the coating and exposing the tape to the outside along the longitudinal direction. Composite cable as described in 1.   On the surface of the metal cable side coating, there are longitudinal irregularities formed by the outer shape of the at least one pair of insulated wires or one of the at least one pair of insulated wires and one wire formed by twisting the strings. The composite cable according to claim 2, wherein the composite cable is formed along the cable. Winding a tape around at least one pair of insulated wires each covering a conductor with an insulator;
A step of integrating the metal cable side coating covering the periphery of the tape and the optical indoor cable side coating covering the periphery of the optical fiber core wire or the optical fiber tape core wire and the tension member by pressure molding. A method of manufacturing a composite cable characterized by the above.   The method for producing a composite cable according to claim 8, comprising a step of twisting the at least one pair of insulated wires, and winding the tape around a wire body formed by twisting the insulated wires.

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