JP6353718B2 - Photoelectric composite cable terminal mounting structure - Google Patents

Description

The present invention relates to a terminal mounting structure for a photoelectric composite cable.

  Conventionally, an optical / electrical composite cable in which an optical fiber that transmits an optical signal and an electric wire that transmits electric power or an electrical signal are integrated is known (see Patent Document 1). Such a cable includes an optical fiber at the innermost side of the cable, a tension member made of tensile strength fiber for relaxing the tension applied to the optical fiber around the optical fiber, and an electric wire around the tension member. It has a layer structure.

JP 2014-63584 A

  However, since the cable described in Patent Document 1 has a three-layer structure of an optical fiber, a tension member, and an electric wire, the diameter of the cable increases when these three layers overlap.

  Further, the cable described in Patent Document 1 needs to perform terminal processing for each of the three layers, which makes the terminal processing very complicated. That is, 1) optical fiber connection processing, 2) processing for maintaining tension of the tension member (processing to be attached to the object after being pulled to some extent), and 3) 3 terminal processing such as wire connection processing is inevitable. Becomes very complicated.

  In particular, the tension member terminal processing is very complicated. Specifically, when the tension member is subjected to terminal processing, it is necessary to cut the tensile strength fiber with a cutting blade. However, the tensile strength fiber is difficult to cut with a normal cutting blade, and the cutting operation itself is complicated. In addition, after a certain number of tensile strength fibers are bundled, a process of maintaining cutting and tension must be performed, and the operation of bundling itself is complicated.

  In addition, since the electric wires arranged around the optical fiber in the cable described in Patent Document 1 are thin, each of these electric wires is taken out and connected to some object. It will be. Therefore, a load is applied to one thin electric wire, and the possibility of cutting increases.

The present invention has been made to solve such a conventional problem, and the object of the present invention is to suppress the cable diameter, reduce the complexity of terminal processing, and reduce the possibility of cutting an electric wire. An object of the present invention is to provide a terminal mounting structure for an optical / electrical composite cable that can be used.

The terminal mounting structure of the optical / electrical composite cable according to the present invention includes an optical fiber that transmits an optical signal, an optical fiber that transmits an optical signal, and a plurality of plated fibers obtained by applying metal plating to tensile fibers and is covered with a resin. The coated plated fiber bundle, the optical / electrical composite cable including a plurality of electric wire layers arranged around the optical fiber, the counterpart of the connection of the optical fiber, and the connection of the optical fiber to the counterpart of the optical fiber A terminal mounting structure for a photoelectric composite cable having a predetermined target to which an electric wire layer is electrically connected, wherein the tensile strength fiber is any one of an aramid fiber, a polyarylate fiber, a PBO fiber, and a carbon fiber. In addition, the electric wire layer functions as a tension member .

  According to the optical / electrical composite cable of the present invention, a plurality of coated plated fiber bundles obtained by bundling a plurality of plated fibers obtained by applying metal plating to tensile strength fibers and covering them with a resin are arranged around the optical fiber to constitute an electric wire layer. doing. For this reason, the coating-plated fiber bundle which has a function of both a tension member and an electric wire will be arrange | positioned around an optical fiber. Thereby, a cable can be made into 2 layer structure of an optical fiber and an electric wire layer, and a cable diameter can be restrained.

  Furthermore, since the cable has a two-layer structure, it is sufficient to perform terminal processing for only two layers, and the complexity is reduced. In particular, the coated plated fiber bundle is made by bundling a plurality of plated fibers and coated with a resin, so that the operation of bundling a plurality of plated fibers becomes unnecessary, and a normal cutting blade is covered by covering with a coating. It becomes easy to bite into the plated fiber bundle and to be easily cut. Therefore, the complexity of the tension member for terminal processing is also reduced.

  In addition, since the coating-plated fiber bundle constitutes one electric wire, each one of these wires is taken out and connected to some object, but each one is based on a tensile strength fiber. Therefore, even if a load is applied to one electric wire, the possibility of cutting is reduced.

As mentioned above, while suppressing a cable diameter, the complexity of a terminal process can be reduced and the possibility of a cutting of an electric wire can be reduced. Further, the tensile strength fiber is any one of an aramid fiber, a polyarylate fiber, a PBO fiber, and a carbon fiber. Here, since these fibers are resistant to heat, it is possible to make a solder connection between the coated plated fiber bundle and the terminal, and since the tensile strength is 1 GPa or more and the elastic modulus is 50 GPa or more, the coated plated fiber bundle It is possible to make it difficult for stress relaxation to occur in the tensile strength fiber during terminal crimping. Therefore, it is possible to prevent the product performance from being deteriorated when the terminals are connected.

  In the optical / electrical composite cable of the present invention, it is preferable that the plated fiber is plated with one or more metals of copper, tin, nickel, gold, and silver on the tensile fiber.

  According to this photoelectric composite cable, since plating is performed with one or more metals of copper, tin, nickel, gold, and silver, plating is performed with a metal that has a relatively high conductivity and is easy to be plated. A plated fiber can be obtained.

  Moreover, the photoelectric composite cable of this invention WHEREIN: It is preferable that the said coating plating fiber bundle has coat | covered the said several plating fiber with the thermoplastic resin.

  According to this photoelectric composite cable, since a plurality of plated fibers are extruded and coated with a thermoplastic resin, the adhesion between the resin and the plated fibers can be controlled, and the terminal can be easily removed. .

ADVANTAGE OF THE INVENTION According to this invention, while suppressing a cable diameter, the complexity of a terminal process can be reduced , and the terminal attachment structure of the photoelectric composite cable which can reduce the possibility of a cutting of an electric wire can be provided.

It is sectional drawing which shows the photoelectric composite cable which concerns on embodiment of this invention. It is sectional drawing which shows an example of the photoelectric composite cable which concerns on a comparative example.

  Preferred embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the following embodiments.

  FIG. 1 is a cross-sectional view showing an optoelectric composite cable according to an embodiment of the present invention. The optical / electrical composite cable 1 shown in FIG. 1 includes an optical fiber 10, an electric wire layer 20 provided on the outer peripheral side of the optical fiber 10, and a sheath 30 provided on the outer peripheral side of the electric wire layer 20.

  The optical fiber 10 includes a core 10A, a clad 10B, and a coating 10C. The core 10A is a propagation path through which an optical signal is transmitted. The clad 10B is disposed around the core 10A, has a refractive index smaller than that of the core 10A, and traps the optical signal in the core 10A. It functions as. The coating 10 </ b> C is a part covering these.

  The electric wire layer 20 is configured by arranging a plurality of coated plating fiber bundles 21 around the optical fiber 10.

  Here, each of the coated plated fiber bundles 21 includes a plurality of plated fibers 22 and a resin 23 that bundles and coats the plurality of plated fibers 22. The plated fiber 22 is configured by applying metal plating to a tensile strength fiber. In this embodiment, the tensile strength fiber is composed of any one of aramid fiber, polyarylate fiber, PBO (poly (p-phenylenebenzobisoxazole) fiber, and carbon fiber, and the metal plating is copper, tin, nickel, gold, or the like. Further, the resin 23 is made of one or more metals such as PVC (polyvinyl chloride), PE (polyethylene), PP (polypropylene), and PET (polyethylene terephthalate). It is composed of a thermoplastic resin.

  In addition, the coating plating fiber bundle 21 has what functions as an electric wire for electric power transmission, and what functions as an electric signal transmission electric wire, and each is connected to the connection destination according to a use.

  The sheath 30 holds the optical fiber 10 and the electric wire layer 20 collectively and protects them. In addition, although illustration is abbreviate | omitted, between the electric wire layer 20 and the sheath 30, the tape winding layer, the shield layer, etc. may be provided suitably.

  Here, it is generally known that a tension member is provided around the optical fiber 10, and this tension member is formed of a tensile strength fiber. That is, in the present embodiment, such a tensile fiber is subjected to metal plating to impart conductivity, and a plurality of plated fibers 22 are bundled to form a coated plated fiber bundle 21, whereby the coated plated fiber bundle 21 is patented. It can be used as a substitute for the electric wire described in Document 1.

  Next, the operation and the like of the photoelectric composite cable 1 according to this embodiment will be described. Prior to this, the photoelectric composite cable 100 as a comparative example will be described. FIG. 2 is a cross-sectional view illustrating an example of an optical / electrical composite cable according to a comparative example.

  As shown in FIG. 2, the optical / electrical composite cable 100 according to the comparative example includes an optical fiber 110 as an innermost layer, and a tension member 120 made of a tensile strength fiber around the optical fiber 110. In addition, the photoelectric composite cable 100 according to the comparative example includes a plurality of electric wires 130 on the outer peripheral side of the tension member 120 and a sheath 140 on the outer side of the plurality of electric wires 130.

  As shown in FIG. 2, the optical / electrical composite cable 100 according to the comparative example has a structure in which three layers of the optical fiber 110, the tension member 120, and the electric wire 130 are essential. For this reason, the diameter of the cable 100 will become large when these three layers overlap.

  Furthermore, since the optical / electrical composite cable 100 according to the comparative example has a three-layer structure, terminal processing for each of the three layers is required. That is, 1) the connection process of the optical fiber 110, 2) the process of maintaining the tension of the tension member 120, and 3) the connection process of the electric wire 130 must be performed, and the terminal process becomes very complicated.

  On the other hand, as shown in FIG. 1, the photoelectric composite cable 1 according to the present embodiment has a structure having two layers of an optical fiber 10 and a wire layer 20. Therefore, by overlapping these two layers, the cable diameter can be made smaller than that of the cable 100 according to the comparative example.

  In addition, the terminal processing may be performed simply by 1) connection processing of the optical fiber 10 and 2) connection processing of the coated-plated fiber bundle 21 of the electric wire layer 20, thereby simplifying the terminal processing. That is, by connecting the coated plated fiber bundle 21 to a predetermined target and performing electrical connection, a process for maintaining tension is performed simultaneously, and the terminal process is simplified.

  In addition, since the optical / electrical composite cable 100 according to the comparative example includes the tension member 120 made of simply tensile strength fibers, the terminal treatment is performed by bundling a certain number of tensile strength fibers and then maintaining the cutting and tension. Will be done. For this reason, the bundling work itself is complicated, and the tensile fibers are difficult to cut with a normal cutting blade, and the cutting work is also complicated.

  In contrast, the optical / electrical composite cable 1 according to the present embodiment includes the coated plating fiber bundle 21 in which a plurality of plating fibers 22 are bundled and covered with a resin, so that it is not necessary to bundle a plurality of plating fibers 22. In addition, by covering with a coating, a normal cutting blade easily bites into the coated plated fiber bundle 21 and is easily cut.

  In addition, since the thin electric wires 130 arranged around the optical fiber 110 are employed in the optical / electrical composite cable 100 according to the comparative example, each of the electric wires 130 is taken out and used as a target. Work to connect. Therefore, a load is applied to one thin electric wire 130 and the possibility of cutting increases.

  On the other hand, in the optical / electrical composite cable 1 according to the present embodiment, the coated plating fiber bundle 21 constitutes one electric wire, and therefore, each of these electric wires is taken out and connected to some target. However, since each one of these is a bundle of a plurality of plated fibers 22 based on tensile strength fibers, the possibility of cutting is reduced even if a load is applied to one electric wire.

  As described above, in the optical / electrical composite cable 1 according to this embodiment, generally, the tensile fiber provided around the optical fiber 10 is imparted with conductivity to form the plated fiber 22, and a plurality of these are bundled. By using the coated plated fiber bundle 21, the coated plated fiber bundle 21 can be used as an alternative to the electric wire described in Patent Document 1. Thereby, the photoelectric composite cable 1 which can achieve said effect | action etc. simultaneously is provided.

  Thus, according to the photoelectric composite cable 1 according to the present embodiment, the coated-plated fiber bundle 21 obtained by bundling a plurality of plated fibers 22 obtained by applying metal plating to the tensile fibers and covering with the resin 23 is used as the optical fiber. A plurality of wires 10 are arranged around 10 to constitute the electric wire layer 20. For this reason, the coated plated fiber bundle 21 having the functions of both the tension member and the electric wire is arranged around the optical fiber 10. Thereby, the cable 1 can be made into the two-layer structure of the optical fiber 10 and the electric wire layer 20, and a cable diameter can be restrained.

  Furthermore, since the cable 1 has a two-layer structure, it is sufficient to perform terminal processing for only two layers, and the complexity is reduced. In particular, the coated plated fiber bundle 21 is a bundle of a plurality of plated fibers 22 covered with a resin 23, so that the operation of bundling a plurality of plated fibers 22 is not necessary and is usually covered by the covering 23. These cutting blades easily bite into the coated plated fiber bundle 21 and are easily cut. Therefore, the complexity of the tension member for terminal processing is also reduced.

  In addition, since the coated plating fiber bundle 21 constitutes one electric wire, each of these wires is taken out and connected to some object, but each one of these has a tensile fiber. Since a plurality of the base plated fibers 22 are bundled, even if a load is applied to one electric wire, the possibility of cutting is reduced.

  As mentioned above, while suppressing a cable diameter, the complexity of a terminal process can be reduced and the possibility of a cutting of an electric wire can be reduced.

  Moreover, since the plating fiber 22 is plated with one or more metals of copper, tin, nickel, gold, and silver, the plating fiber 22 is plated with a metal that has a relatively high conductivity and is easy to be plated. The plated fiber 22 can be obtained.

  The tensile strength fiber is any one of an aramid fiber, a polyarylate fiber, a PBO fiber, and a carbon fiber. Here, since these fibers are resistant to heat, the coated plating fiber bundle 21 can be soldered to the terminal, and the tensile strength is 1 GPa or more and the elastic modulus is 50 GPa or more. It is possible to make it difficult for stress relaxation to occur in the tensile strength fiber at the time of terminal crimping with 21. Therefore, it is possible to prevent the product performance from being deteriorated when the terminals are connected.

  In addition, since a plurality of plated fibers are extrusion coated with a thermoplastic resin, the adhesion between the resin and the plated fibers can be controlled, and the terminal can be easily removed.

  In particular, Japanese Unexamined Patent Application Publication No. 2013-140290 discloses a technique for covering a tension member with an ultraviolet curable resin. However, if it is coated with an ultraviolet curable resin, the fiber-resin adhesion is too strong and it is difficult to remove the coating. However, coating with a thermoplastic resin also causes the above-mentioned problem of coating removal. do not do.

  As described above, the present invention has been described based on the embodiment, but the present invention is not limited to the above embodiment, and may be modified without departing from the gist of the present invention.

  For example, the photoelectric composite cable 1 according to the present embodiment is not limited to that described with reference to FIG. For example, the number of optical fibers 10 is not limited to one, and a plurality of optical fibers 10 may be provided.

  Furthermore, in the present embodiment, the tensile strength fiber is any one of an aramid fiber, a polyarylate fiber, and a PBO fiber, but is not limited thereto, and may be a polyester fiber or a nylon (registered trademark) fiber.

1: Photoelectric composite cable 10: Optical fiber 10A: Core 10B: Clad 10C: Coating 20: Wire layer 21: Coated plated fiber bundle 22: Plating fiber 23: Resin 30: Sheath

Claims (3)

An optical fiber for transmitting an optical signal, and an electric wire layer in which a plurality of coated plated fiber bundles obtained by bundling a plurality of plated fibers obtained by applying metal plating to tensile strength fibers and coated with a resin are arranged around the optical fiber. Terminal mounting of a photoelectric composite cable having a photoelectric composite cable, a counterpart for connection of the optical fiber, and a predetermined target to which the wire layer is electrically connected when the optical fiber is connected to the counterpart Structure,
The tensile strength fiber is any one of an aramid fiber, a polyarylate fiber, a PBO fiber, and a carbon fiber,
The terminal mounting structure for an optical / electrical composite cable , wherein the electric wire layer functions as a tension member . The terminal of the photoelectric composite cable according to claim 1, wherein the plated fiber is plated with one or more metals of copper, tin, nickel, gold, and silver on the tensile fiber. Mounting structure . 3. The terminal mounting structure for an optical / electrical composite cable according to claim 1, wherein the coated plated fiber bundle covers a plurality of the plated fibers with a thermoplastic resin. 4.

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