JP2018006181A - Cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide technology to reduce the diameter of a cable, while maintaining bending resistance of the cable.SOLUTION: There is provided a cable including an aggregation core formed by twisting a plurality of conductors and cores having an insulator layer arranged to surround a side periphery of the conductor, and a sheath arranged to surround the side peripheral of the aggregation core. The insulator layer comprises a fluorine-based resin. A skid layer is arranged between the aggregation core and the sheath.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cable.

  A cable (flexible cable) used for wiring of various transport facilities such as a crane and a transport carriage is generally formed by twisting a plurality of cores having a conductor and an insulating layer provided so as to surround a side of the conductor. The assembly core and a sheath provided so as to surround the side periphery of the assembly core. In the cable described above, the insulating layer may be formed of EP rubber or the like, and the sheath constituting the outermost layer of the cable may be formed of a rubber material having excellent mechanical strength and elasticity (see, for example, Patent Document 1). .

JP 2006-084449 A

  However, the above-described cable has a problem that the outer diameter of the cable is increased because the insulating layer is formed of a material that is difficult to form thin, such as EP rubber.

  An object of the present invention is to provide a technique capable of reducing the diameter of a cable while maintaining the bending resistance of the cable.

According to one aspect of the invention,
An assembly core formed by twisting a plurality of cores each having a conductor and an insulating layer provided so as to surround a side periphery of the conductor;
A sheath provided so as to surround a side periphery of the collective core,
The insulating layer is made of a fluorine resin,
A cable provided with a lubricant layer is provided between the collective core and the sheath.

  According to the present invention, it is possible to reduce the diameter of the cable while maintaining the bending resistance of the cable.

It is a figure which shows an example of the schematic sectional drawing in the radial direction of the cable concerning one Embodiment of this invention. It is a figure which shows an example of the schematic block diagram of the cable concerning one Embodiment of this invention. It is a figure which shows an example of the partial expanded sectional view of the cable concerning one Embodiment of this invention.

<One Embodiment of the Present Invention>
(1) Configuration of Cable Hereinafter, a configuration of a cable according to an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the cable 1 according to the present embodiment has an aggregate core 3 formed by twisting a plurality of (for example, 24) cores 2. For example, the set core 3, the first layer (inner layer consisting of nine core 2a the shortest distance (Soshin径) is arranged such that r ₁ between the centers of the core 32 of the cable 31 ) 2F, and a second layer (outer layer) 2S composed of 15 cores 2b arranged so that the shortest distance is r ₂ longer than r ₁ .

  The core 2 includes, for example, a conductor 21 and an insulating layer 22 provided so as to surround the outer periphery of the conductor 21, that is, to cover the outer peripheral side surface of the conductor 21.

  As the conductor 21, for example, a stranded wire conductor formed by twisting a plurality of strands of copper wire or copper alloy wire can be used. A copper wire is preferable in that it has a higher electrical conductivity than a copper alloy wire, and a copper alloy wire is preferable in that it has a higher tensile strength than a copper wire.

  The insulating layer 22 is preferably formed of a material having high insulation (insulation breakdown voltage), excellent mechanical strength, and capable of forming a thin wall. As such a material, a fluorine-based resin such as ethylenetetrafluoroethylene (ETFE) or polyvinylidene fluoride (PVdF) can be used. The insulating layer 22 formed of such a fluororesin also has a characteristic that it is slippery. The insulating layers 22 included in all the cores 2 constituting the aggregated core 3 are preferably formed of the same material.

  The thickness of the insulating layer 22 is preferably, for example, 1 to 1.5 times the diameter of the strands constituting the conductor 21 (stranded conductor) (the outer diameter of one strand). If the thickness of the insulating layer 22 is less than 1 times the outer diameter of the wire, the thickness of the insulating layer 22 is too thin, the mechanical strength is insufficient, and repeated bending causes cracking and low life. May be. By making the thickness of the insulating layer 22 more than 1 times the outer diameter of the strand, necessary and sufficient mechanical strength can be obtained, and further, a desired withstand voltage can be obtained. Performance). For example, even when a large voltage of 600 V or higher is applied, the occurrence of dielectric breakdown can be suppressed. However, when the thickness of the insulating layer 22 exceeds 1.5 times the outer diameter of the strand, the thickness of the insulating layer 22 increases and the diameter of the core 2 per wire may increase. By making the thickness of the insulating layer 22 to be 1.5 times or less the outer diameter of the strand, the core 2 per one can be reduced in diameter while maintaining necessary and sufficient mechanical strength (bending resistance). . For example, the diameter of one core 2 can be made smaller than that of a core having an insulating layer formed of ethylene propylene (EP) rubber.

  In order to round the cable 1, an insulating inclusion (filler, insulating string, insulating spacer, etc., for example, hemp string) 4 may be disposed at the center of the collective core 3 as necessary. . That is, the core 2 is preferably disposed so as to surround the side periphery of the inclusion 4 (so that the inclusion 4 is at the center). Note that the inclusion 4 may be included in the collective core 3.

  The plurality of cores 2 constituting the collective core 3 may be press-wound (collectively covered by vertical or horizontal winding), for example, with a tape (bind tape, press-winding tape) 5 or the like. The tape 5 is for bundling a plurality of cores 2. As the tape 5, for example, a tape having a base material (base fabric, fabric) made of rayon fiber such as staple yarn, woven fabric or nonwoven fabric formed of polyester fiber, nylon fiber, cotton fiber, polypropylene fiber or the like is used. be able to. Moreover, it is preferable that the tape 5 has different slipperiness on the front and back surfaces. This point will be described later.

  A jacket (sheath) 6 is provided on the side periphery of the aggregate core 3 (on the tape 5 when the tape 5 is provided) so as to cover the outer peripheral side surface of the aggregate core 3. The sheath 6 is a layer constituting the outermost layer of the cable 1. The sheath 6 is provided with a core 3 (for example, a plurality of conductive wires constituting the second layer) via the tape 5 from the viewpoint of enhancing the wear resistance performance and impact resistance performance of the cable 1 and making the cable 1 easier to iron. 2b) is solidly molded so as to bite into the sheath 6.

  The sheath 6 preferably has higher elasticity than the above-described insulating layer 22, that is, high scratch resistance. In this specification, having high elasticity means that the elastic modulus is high. The sheath 6 is preferably formed of a material having high elasticity and excellent mechanical strength. As such a material, a rubber material such as chloroprene (CR) can be used. Thereby, for example, the cable 1 is used outdoors such as a harbor, a strong wind blows as the typhoon approaches and passes, and the cable 1 is blown by the wind, and the peripheral devices such as the cables 1 and the cable 1 and the cable reel. Even when the cable 1 is subjected to external stress such as friction, impact, ironing, etc. when the cable 1 collides, or when the cable 1 is wound around the cable reel or pulled out from the cable reel, It is possible to prevent cracks (sheath 6 from breaking).

  The thickness of the sheath 6 is preferably 0.8 to 1.2 times the outer diameter of one core 2 (the outer diameter of the insulating layer 22 included in the core 2), for example. When the thickness of the sheath 6 is less than 0.8 times the outer diameter of the core 2, the sheath 6 is too thin, and the elasticity of the sheath 6 may be lower than the elasticity of the insulating layer 22. By making the thickness of the sheath 6 0.8 times or more the outer diameter of the core 2, the elasticity of the sheath 6 can be made higher than the elasticity of the insulating layer 22. That is, the scratch resistance of the sheath 6 can be improved, and the sheath 6 has high mechanical strength. However, when the thickness of the sheath 6 exceeds 1.2 times the outer diameter of the core 2 and the thickness of the sheath 6 is increased, the outer diameter of the cable 1 is increased. By making the thickness of the sheath 6 1.2 times or less the outer diameter of the core 2, the cable 1 can be made thin and light while maintaining desired scratch resistance and desired mechanical strength.

  The cable 1 is provided with a below-described lubricant (sliding material layer) 7 between the collective core 3 and the sheath 6 so that slippage occurs between the collective core 3 and the sheath 6. By providing the lubricating material (sliding material layer) 7, the sliding property between the collective core 3 and the sheath 6 becomes high. High slipperiness means that the coefficient of friction is low and slippery. More specifically, it means that at least one of the coefficient of static friction or the coefficient of dynamic friction is lower than in the case where the lubricant (the lubricant layer) 7 is not provided.

  In order to increase the slipperiness between the collective core 3 and the sheath 6, it is preferable to apply a lubricant 7 between the collective core 3 and the sheath 6, for example, as shown in FIG. Further, the lubricant 7 may be applied to the outer peripheral surface of the core 2, or the lubricant 7 may be blended in the forming material of the insulating layer 22 constituting the core 2. As the lubricant 7, for example, fluorine oil, silicone oil, or talc powder can be used.

  The tape 5 is wound around the collective core 3 so that the front surface 5a of the tape 5 is on the outside (the outer peripheral side of the cable 1) and the back surface 5b of the tape 5 is on the collective core 3 (core 2) side. In this way, when a plurality of cores 2 are collectively covered with the tape 5, it is configured so that slip occurs between the aggregate core 3 and the tape 5, and slip does not occur between the tape 5 and the sheath 6. What is necessary is just to comprise. For example, the front surface 5a of the tape 5 is preferably a surface with low slipperiness (high adhesiveness), and the back surface 5b is preferably a surface with high slipperiness (low adhesiveness). Specifically, for example, as shown in FIG. 3, the surface of the tape 5 that contacts the sheath 6 (the surface 5 a of the tape 5) is in close contact with the sheath 6, and the surface of the tape 5 that contacts the collective core 3 (of the tape 5 It is preferable to give the back surface 5b) slipperiness. Thus, it is preferable that the tape 5 has different slipperiness (adhesiveness) on the front and back surfaces. The lubricant 7 may be applied to each core 2, or the aggregate 7 may be applied to the outer peripheral surface of the aggregate core 3.

  As described above, only the back surface 5b of the tape 5 has slipperiness, that is, the back surface 5b of the tape 5 and the core 3 are not in close contact (FIG. 3). It is preferable to apply the above-mentioned lubricant 7 only.

  In order to bring the surface 5a of the tape 5 and the sheath 6 into close contact with each other, it is preferable to apply a rubber material such as raw rubber having low slipperiness only to the surface 5a of the tape 5 (base fabric). It is preferable to apply the rubber material so as to penetrate into the stitches of the base fabric of the tape 5 described above. Further, when the surface 5a of the tape 5 and the sheath 6 are brought into close contact with each other, the same rubber material as the forming material of the sheath 6 is applied to the surface 5a of the tape 5 from the viewpoint of further increasing the adhesive force between the surface 5a of the tape 5 and the sheath 6. It is more preferable to apply.

  As the tape 5 having different slidability on the front and back surfaces as described above, for example, the lubricant 7 is applied to one main surface of the base fabric of the tape 5, and the raw rubber is applied to the other main surface of the base fabric. It is possible to use a rubberized cloth tape formed in this way. Since raw rubber is softened by heat when the sheath 6 is coated, good adhesion to the sheath 6 can be obtained.

(2) Effects According to the Present Embodiment According to the present embodiment, one or more effects described below are exhibited.

(A) Since the assembly core 3 and the sheath 6 are configured to slide, when the cable 1 is bent, the cores 2 constituting the assembly core 3 are individually (in the cable 1 (sheath 6)) ( The whole collective core 3 moves as one lump without moving apart. Further, the sheath 6 and the aggregate core 3 as a whole move differently, that is, the aggregate core 3 as a whole moves independently regardless of the movement of the sheath 6. In addition, when the cables 1 collide with each other and peripheral devices such as the cable reel, or when the cable 1 is wound around the cable reel or pulled out from the cable reel, the cable 1 is rubbed, ironed, or shocked. Even when external stress such as the above is applied, the collective core 3 moves in the same manner as described above.

  As a result, when the cable 1 is bent or when external stress is applied to the cable 1 (hereinafter also referred to as “when the cable 1 is bent”), the core 2 is kinked, broken, or disconnected. Can be suppressed. The kink of the core 2 means that the core 2 is in a state in which it is twisted, kinked, kinked, humped, broken, crushed or the like. By suppressing the undulation of the collective core 3 in this manner, the bending resistance of the cable 1 can be improved. Further, the flexibility (flexibility) of the entire cable 1 can be improved.

  On the other hand, when the cable is bent or the like, if the collective core does not move as one lump and each core moves individually, the position of the specific core may shift. For example, when a cable is bent, a specific core may protrude toward the outside (outer peripheral side) of the cable inside the bent portion. Since a structure such as a tape or a sheath is provided on the outer periphery of the core, the protruding core is pressed down by the structure described above. For this reason, a core becomes easy to kink.

That is, by configuring the assembly core 3 and the sheath 6 so as to slide, the bending resistance of the entire cable 1 can be maintained at a high level.
Moreover, by forming the insulating layer 22 from a fluorine-based resin, for example, the insulating layer 22 is more than the insulating layer formed of EP rubber while maintaining the same level of insulation and mechanical strength as the insulating layer formed of EP rubber. Can be made thinner. Thereby, the diameter of the conductive wire 2 per one can be made thin, without reducing the cross-sectional area (in the radial direction) of the conductor 21. For this reason, the collective core 3 formed by twisting a plurality of cores 2 can be made thin. Further, as described above, the thickness of the sheath 6 is determined by the diameter of the core 2 per one. For this reason, if the diameter of the core 2 per one becomes small, the thickness of the sheath 6 will also become thin. As a result, the cable 1 can be made thin. Moreover, the cable 1 can also be reduced in weight because the cable 1 becomes a small diameter.

  For example, a conductor having a cross-sectional area of 3.5 SQ is formed by twisting 65 strands having an outer diameter of 0.26 mm (collective twist). On the outer peripheral side surface of this conductor, an insulating layer is formed by covering with ETFE so that the thickness is 0.32 mm (1.23 times the strand diameter), and a core having an outer diameter of 3.06 mm is formed. Then, talc as a lubricant is applied to the outer peripheral surface of the core. 24 cores and a central intervening (filler) are prepared, and the 24 cores are twisted to form an aggregate core. At this time, each core is arranged so that the aggregate core has two layers of an inner layer composed of nine cores and an outer layer composed of 15 cores. Then, the collective core (a plurality of cores) is pressed and wound with the above rubberized cloth tape. Then, on the outer peripheral side surface of this tape, a sheath was formed by covering with CR (solid coating) so that the thickness was 2.6 mm (0.85 times the outer diameter of the core), and a cable was formed. . This cable had an outer diameter of 24 mm and a weight of 1180 kg / km. In addition, a conductor having the same cross-sectional area as 3.5 SQ is used, and an insulating layer is formed on the outer peripheral side surface of the conductor by covering with an EP rubber so that the thickness is 0.8 mm. A .02 mm core is formed, and 24 cores and a central intervening (filler) are twisted to form an aggregate core. After the aggregate core is pressed and wound with tape, a thickness is formed on the outer peripheral side surface of the tape. A sheath was formed by covering with CR so as to be 3.4 mm (0.85 times the outer diameter of the core), thereby forming a cable. This cable, that is, a cable formed using a core having an insulating layer made of EP rubber, had an outer diameter of 31 mm and a weight of 1530 kg / km. Thus, the present inventor has confirmed that forming the insulating layer with ETFE can make the cable thinner and lighter than when forming the insulating layer with EP rubber.

  As described above, the cable is made to slide between the collective core 3 and the sheath 6, and the insulating layer 22 is formed of a fluorine-based resin, so that the cable diameter is reduced while maintaining the bending resistance of the cable. can do.

(B) Further, by configuring the assembly core 3 and the sheath 6 to slip, the assembly core 3 is formed of two layers (first layer) as in the present embodiment. 2F and the second layer 2S), and even when the insulating layer 22 is formed of a material having a low coefficient of friction such as ETFE and being slippery, when the cable 1 is bent, each core 2 Before the individual cores move individually, the entire collective core 3 moves as one lump. As a result, kinking of the core 2 can be suppressed.

(C) By applying the lubricant 7 between the aggregate core 3 and the sheath 6 (providing a lubricant layer), when the cable 1 is bent, the aggregate core 3 as a whole becomes easy to move as one lump. Thereby, generation | occurrence | production of the kink of the core 2 can be suppressed reliably. In addition, since the lubricant 7 may be applied, the lubricant layer can be easily provided. Further, if a talc material is used as the lubricant 7 to form a lubricant layer, the lubricant can be configured to slide between the aggregate core 3 and the sheath 6 reliably, and the availability of the talc material is excellent. Therefore, the manufacturing cost of the cable 1 can be reduced.

(D) When a plurality of cores 2 are collectively covered with the tape 5, the cable 1 is bent or the like by bringing the surface (the surface 5 a of the tape 5) in contact with the sheath 6 into close contact with the sheath 6. Then, the tape 5 can be prevented from moving in the axial direction of the collective core 3 (cable 1) inside the sheath 6. As a result, even when the cable 1 is repeatedly bent or when external stress is repeatedly applied to the cable 1, it is possible to suppress wrinkling of the tape 5 inside the sheath 6, and as a result, the sheath 6 may be broken. , Cracks in the sheath 6 can be suppressed.

  On the other hand, if the tape is not in close contact with the sheath, the tape may move in the axial direction of the collective core inside the sheath when the cable is bent. Therefore, when the cable is repeatedly bent, the tape may be slid in the sheath (approaching or sagging). As a result, tape kinks (cracks) may appear on the surface of the sheath, from which the sheath may crack or the sheath may crack.

(E) Even if the tape 5 is provided by arranging the sliding material 7 (sliding material layer) on the back surface 5b of the tape 5 to give the sliding property, when the cable 1 is bent, the sheath 6, the entire aggregate core 3 can be maintained as one lump. In the case where the back surface 5b of the tape 5 is made slippery, when the cable 1 is bent, the entire aggregate core 3 moves as one lump, and the tape 5 moves together with the sheath 6. Thereby, the bending resistance of the cable 1 can be improved. That is, even when the tape 5 is provided, at least the effect (a) can be obtained.

  On the other hand, if neither the front surface nor the back surface of the tape is slippery, that is, if the tape is in close contact with the sheath and the collective core, when the cable is bent, the entire collective core is It cannot be moved as one lump.

(F) When the surface 5a of the tape 5 and the sheath 6 are brought into close contact, the tape 5 and the sheath 6 can be integrated by applying the same rubber material as the forming material of the sheath 6 to the surface 5a of the tape 5. it can. Thereby, the contact | adhesion power of the surface 5a of the tape 5 and the sheath 6 can be raised more. As a result, the effect (d) can be obtained more reliably.

(G) The sliding property between the cores 2 can be improved by applying the lubricant 7 on the outer peripheral side surface of the insulating layer 22 of each core 2. Thereby, it can suppress more reliably that the core 2 kinks.

(H) By realizing the slipperiness with the lubricant 7, the slipperiness can be maintained. This is because when the cable 1 is bent or the like, the lubricant 7 moves in the sheath 6 (in the tape 5), and the lubricant 7 circulates throughout the sheath 6 (in the tape 5). . Thereby, the slipperiness between the sheath 6 (tape 5) and the collective core 3 can always be ensured. As a result, at least the effect (a) can be maintained over a long period of time.

(I) When the insulating layers 22 of all the cores 2 constituting the aggregated core 3 are formed of the same material, that is, by making the friction coefficient between the cores 2 equal, The behaviors (movements) of all the cores 2 included in the core 3 can be made uniform. Thereby, when the cable 1 bends etc., it can suppress reliably that each core 2 moves individually, and it can suppress reliably that the position of the specific core 2 shifts | deviates. As a result, the core 2 can be more reliably suppressed from kinking.

(J) Since the cable 1 has a small diameter, when the cable 1 is used as a cable for outdoor wiring, for example, the area where the cable 1 receives wind is reduced. Thereby, even if it is a case where a strong wind blows in the state where the cable 1 was wired outdoors, it becomes difficult for the cable 1 to be covered with the wind. For this reason, it is possible to prevent an accident such as the cable 1 falling or being hit by hitting a structure. As a result, the cable life is extended.

(K) Further, by reducing the diameter of the core 2 per one, the gap (volume) formed between the cores 2 in the aggregate core 3 formed by twisting a plurality of cores 2 is reduced. Can do. As a result, the specific gravity of the cable 1 can be increased. As the specific gravity of the cable 1 increases, the cable 1 is less likely to be blown by the wind. Thereby, the effect (k) can be obtained with certainty.

(L) Moreover, the flexibility (flexibility) in the whole cable 1 can further be improved because the core 2 per one becomes a small diameter. Thereby, it can suppress more reliably that the core 2 kinks.

(M) Since the cable 1 is light, the load applied to the cable 1 itself when the cable 1 is bent can be reduced. Thereby, the above-mentioned external stress applied to the cable 1 when the cable 1 is bent is alleviated. As a result, a decrease in cable life can be suppressed.

(N) Further, by making the cable 1 thin and light, the cable 1 can be suitably used for wiring various transport facilities such as cranes and transport carts. It is possible to reduce the size of various facilities including the above. Moreover, effects such as space saving of the cable 1 place and reduction of transportation costs can be obtained.

(O) Further, when connecting the cable 1, an operation of peeling the sheath 6 at the end of the cable 1 may be performed. At this time, since the sliding property between the collective core 3 and the sheath 6 is increased and the core 3 and the sheath 6 are not brought into close contact with each other, the sheath 6 can be easily peeled off, so that the connection workability of the cable 1 can be improved. it can.

(P) The cable 1 according to the present embodiment is wired outdoors and can be suitably used in an environment where strong winds may be blown by the approach or passage of a typhoon or the like. In addition, the cable 1 according to the present embodiment can be suitably used in a severe environment where the cable 1 is repeatedly bent, ironed with pulleys and reels, and repeatedly subjected to friction. Specifically, the cable 1 according to the present embodiment is particularly effective when used for wiring of various transportation facilities that are used in harbors or in industrial fields such as steel.

  For example, the cable 1 according to the present embodiment is preferably used for a traverse moving curtain wiring that bends repeatedly in a state where the cable is fixed at a certain length in a large crane used in a harbor crane, a steel plant, or the like. Can do.

  Further, for example, the cable 1 according to the present embodiment is a lift that repeats a behavior in which a cable of a certain length is wound in a coil shape or a cable wound in a coil shape is drawn out linearly in the large crane. It can be suitably used for the wiring of the movement spreader.

  In addition, for example, the cable 1 according to the present embodiment can be suitably used for wiring using a traveling reel in which the cable of a certain length repeats winding and feeding behavior in the large crane.

  Here, for reference, a conventional cable using a core having an insulating layer formed of EP rubber will be described. An insulating layer formed of EP rubber has a higher coefficient of friction and is less slippery than an insulating layer formed of a fluorine-based resin. The insulating layer made of EP rubber is in close contact with a sheath made of a rubber material such as CR.

  However, in a cable using a plurality of cores in which the insulating layer is formed of EP rubber, the core may move individually when the cable is bent. In particular, when the aggregate core has two layers composed of cores as in the present embodiment, the core constituting the outer layer of the aggregate core is in close contact with the sheath, The core constituting the inner layer and the core constituting the outer layer are not in close contact. For this reason, when the cable is bent, the movement of the core constituting the outer layer and the core constituting the inner layer may be different, and the core may move individually. As a result, core misalignment may occur. Moreover, it is difficult to reduce the coating thickness of rubber materials such as EP rubber due to the properties of rubber. For this reason, the diameter of the core per one will become large, and as a result, the diameter of a cable will become large.

  On the other hand, in this embodiment, the slipperiness between the collective core and the sheath is increased. As a result, even if the core has two or more layers made of conductive wires, or the insulating layer is made of ETFE that is more slippery than EP rubber, the cable can be bent in the sheath. The entire assembly core can be moved as one lump. For this reason, it can suppress that a core kinks. In addition, since fluororesins such as ETFE can be easily formed thin, by forming the insulating layer with ETFE, the core per one can be made thin, and as a result, the cable can be made thin.

(Other embodiments of the present invention)
As mentioned above, although one Embodiment of this invention was described concretely, this invention is not limited to the above-mentioned embodiment, In the range which does not deviate from the summary, it can change suitably.

  In the above-described embodiment, the case where the lubricant layer is formed by applying the lubricant to the back surface of the tape has been described as an example, but the present invention is not limited to this. That is, the lubricant layer may be configured by applying a lubricant to the outer peripheral surface of each core or the outer peripheral surface of the collective core, or the lubricant is blended with silicone oil or the like in the material of the core insulating layer. Layers may be configured.

  Further, for example, the collective core may not be collectively covered with tape, and even with such a cable, the same effect as in the above embodiment can be obtained by increasing the slipperiness between the collective core and the sheath. It is done.

  Further, for example, the aggregate core is not limited to the case where the aggregate core has two layers of the first layer and the second layer, and may be an aggregate core having three or more layers made of cores. It may be an aggregate core that is a layer.

<Preferred embodiment of the present invention>
Hereinafter, preferred embodiments of the present invention will be additionally described.

[Appendix 1]
According to one aspect of the invention,
An assembly core formed by twisting a plurality of cores each having a conductor and an insulating layer provided so as to surround a side periphery of the conductor;
A sheath provided so as to surround a side periphery of the collective core,
The insulating layer is made of a fluorine resin,
A cable provided with a lubricant layer is provided between the collective core and the sheath.

[Appendix 2]
The cable of appendix 1, preferably
A static friction coefficient between the aggregate core and the sheath is lower than a static friction coefficient between the cores.

[Appendix 3]
Additional cable 1 or 2, preferably,
A dynamic friction coefficient between the collective core and the sheath is lower than a dynamic friction coefficient between the cores.

[Appendix 4]
Any one cable of appendix 1-3, Preferably,
A lubricant is applied between the aggregate core and the sheath to constitute the lubricant layer.

[Appendix 5]
The cable according to any one of appendices 1 to 4, preferably,
Having a tape for pressing and winding the assembly core;
The surface of the tape that contacts the sheath is in close contact with the sheath,
The lubricant layer is disposed on the other surface side of the tape.

[Appendix 6]
The cable according to any one of appendices 1 to 5, preferably,
The lubricant layer is made of a talc material applied to the outer peripheral surface of the collective core.

[Appendix 7]
The cable of appendix 5, preferably
The surface of the tape that contacts the sheath is in close contact with the sheath,
The lubricant is applied to the surface of the tape that contacts the aggregate core.

[Appendix 8]
Any one cable of appendices 1-7, preferably,
The insulating layers of all the cores constituting the aggregate core are formed of the same material.

[Appendix 9]
Any one cable of appendices 1-8, preferably,
The sheath has higher elasticity than the insulating layer.

[Appendix 11]
Any one of the appendices 1 to 10, preferably,
Used in environments exposed to strong winds.

1 Cable 2 Core 2a Conductor 2b Insulating layer 3 Aggregate core 6 Sheath 7 Lubricant (lubricant layer)

Claims (4)

An assembly core formed by twisting a plurality of cores each having a conductor and an insulating layer provided so as to surround a side periphery of the conductor;
A sheath provided so as to surround a side periphery of the collective core,
The insulating layer is made of a fluorine resin,
A cable in which a lubricant layer is provided between the collective core and the sheath. Having a tape for pressing and winding the assembly core;
The surface of the tape that contacts the sheath is in close contact with the sheath,
The cable according to claim 1, wherein the lubricant layer is disposed on the other surface side of the tape. The cable according to claim 1, wherein the lubricant layer is made of a talc material applied to an outer peripheral surface of the collective core. The cable according to claim 1, wherein the sheath has higher elasticity than the insulating layer.

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