Cable

Abstract

To provide a cable capable of inhibiting a bend phenomenon.SOLUTION: A cable includes a first sheath and one or more wire cores disposed in an interior of the first sheath. The wire core includes a reinforcement layer that is disposed on an outer peripheral side in the wire core and is configured with a braid of a high tensile strength fiber, and a second sheath disposed on an inner peripheral side than the reinforcement layer. The reinforcement layer includes a hole that penetrates the reinforcement layer in a thickness direction. The hole is a gap in the braid of the high tensile strength fiber. The first sheath and the second sheath are in contact with each other in the hole.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to cables. [Background technology]

[0002] BACKGROUND ART Conventionally, a cable including a first sheath and one or more wire cores disposed inside the first sheath has been known. Such a cable is disclosed in, for example, Patent Document 1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-247072 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, as shown in Fig. 5, cable 101 is used in moving device 103. Cable 101 used in moving device 103 is, for example, a cab tire cable for a reel winding method. Moving device 103 includes cable reel 105 and guide roller 107. Cable 101 is wound around cable reel 105. Guide roller 107 guides cable 101 pulled out from cable reel 105.

[0005] 6A, guide roller 107 applies a compressive force F1 to cable 101. As a result, internal stress F2 occurs in wire core 109 of cable 101. Internal stress F2 includes a component in the longitudinal direction of cable 101. Tension F3 is applied to cable 101.

[0006] As cable 101 is fed, internal stress F2 occurs at multiple locations in the longitudinal direction of cable 101, as shown in Fig. 6B. As a result, core 109 separates from first sheath 111, causing a undulating phenomenon (hereinafter referred to as the undulating phenomenon), as shown in Fig. 6C. In one aspect of the present disclosure, it is preferable to provide a cable that can suppress the undulating phenomenon. [Means for solving the problem]

[0007] One aspect of the present disclosure is a cable including a first sheath and one or more wire cores disposed inside the first sheath. The wire cores include a reinforcing layer formed by braiding high-tensile fibers and disposed on the outer periphery of the wire core, and a second sheath disposed on the inner periphery of the reinforcing layer. The reinforcing layer has a hole penetrating the reinforcing layer in the thickness direction. The hole is a gap in the braid of the high-tensile fibers. The first sheath and the second sheath are in contact at the hole. A cable according to one aspect of the present disclosure can suppress undulation. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a plan view showing the configuration of a cable. [Figure 2] FIG. 2 is a cross-sectional view showing the II-II cross section in FIG. [Figure 3] 1A to 1C are explanatory diagrams showing a manufacturing process of a cable. [Figure 4] FIG. 10 is a cross-sectional view showing an orthogonal cross section of a cable according to a second embodiment. [Figure 5] FIG. 2 is an explanatory diagram illustrating a configuration of a moving device. [Figure 6] Fig. 6A is an explanatory diagram showing the force generated at the contact point between the cable and the guide roller, Fig. 6B is an explanatory diagram showing the internal stress generated in the cable, and Fig. 6C is an explanatory diagram showing the undulation phenomenon. DETAILED DESCRIPTION OF THE INVENTION

[0009] Exemplary embodiments of the present disclosure will be described with reference to the drawings. First Embodiment 1. Cable 1 Configuration The configuration of cable 1 will be described with reference to Figs. 1 to 3. As shown in Fig. 1, cable 1 is a long member. Cable 1 of the first embodiment is, for example, a round cabtire cable. Cable 1 of the first embodiment is, for example, a cabtire cable for a reel winding method.

[0010] As shown in FIG. 2, the cable 1 includes a first sheath 3 and a wire core 5. Examples of materials for the first sheath 3 include chloroprene rubber and ethylene rubber. The chloroprene rubber used for the first sheath 3 is preferably flame-resistant enough to pass the horizontal test specified in JIS C 3005 4.26.2 a). The ethylene rubber used for the first sheath 3 is preferably an ethylene-propylene rubber mixture, an ethylene-propylene-diene rubber mixture, or an ethylene-vinyl acetate rubber mixture that is flame-resistant enough to pass the inclined test specified in JIS C 3005 4.26.2 b). The thickness of the first sheath 3 is preferably 2 mm or more and 7 mm or less.

[0011] The thickness of the first sheath 3 is preferably greater than the thickness of the second sheath 21 described later. The thickness of the first sheath 3 is preferably four to eight times the thickness of the second sheath 21.

[0012] In the first embodiment, the first sheath 3 is the outermost component of the cable 1. The outer side refers to the side away from the center of the cable 1 in a cross section perpendicular to the longitudinal direction of the cable 1 (hereinafter referred to as an orthogonal cross section). The inner side refers to the side opposite to the outer side. In the orthogonal cross section of the cable 1, for example, the inner and outer peripheral surfaces of the first sheath 3 each have a circular shape.

[0013] The wire core 5 is disposed inside the first sheath 3. In the first embodiment, the wire core 5 is located at the center of the cable 1 in an orthogonal cross section of the cable 1. The entire outer circumferential surface of the wire core 5 is covered with the first sheath 3. In the orthogonal cross section of the cable 1, the outer circumferential surface of the wire core 5 has, for example, a circular shape.

[0014] The wire core 5 includes a conductor 11, an inner semiconductive layer 13, an insulator 15, an outer semiconductive layer 17, a shield braid 19, a second sheath 21, and a reinforcing layer 23. Conductor 11 is located at the center of core 5 in an orthogonal cross section of cable 1. Examples of materials for conductor 11 include copper, copper alloy, aluminum, and aluminum alloy. The diameter of conductor 11 is, for example, 4 mm or more and 30 mm or less. In the orthogonal cross section of cable 1, the shape of conductor 11 is, for example, circular.

[0015] The internal semiconductive layer 13 is located on the outer periphery of the conductor 11. For example, the inner periphery of the internal semiconductive layer 13 is in contact with the outer periphery of the conductor 11. Examples of the material of the internal semiconductive layer 13 include semiconductive rubber-based materials. Examples of rubber-based materials include ethylene propylene rubber (EP rubber). The internal semiconductive layer 13 is made of, for example, a tape member in which semiconductive rubber-based materials are applied to both sides of a cloth tape. The thickness of the internal semiconductive layer 13 is, for example, 0.2 mm or more and 0.5 mm or less.

[0016] The insulator 15 is located on the outer periphery of the internal semiconductive layer 13. For example, the inner periphery of the insulator 15 is in contact with the outer periphery of the internal semiconductive layer 13. Examples of the material for the insulator 15 include EP rubber. The thickness of the insulator 15 is, for example, 2.5 mm or more and 5.5 mm or less.

[0017] The outer semiconductive layer 17 is located on the outer periphery of the insulator 15. For example, the inner periphery of the outer semiconductive layer 17 is in contact with the outer periphery of the insulator 15. Examples of the material for the outer semiconductive layer 17 include semiconductive rubber-based materials. Examples of rubber-based materials include EP rubber. The outer semiconductive layer 17 is made of, for example, a tape member in which semiconductive rubber-based material is applied to both sides of a cloth tape. The thickness of the outer semiconductive layer 17 is, for example, 0.2 mm or more and 0.5 mm or less.

[0018] The shielding braid 19 is located on the outer peripheral side of the outer semiconductive layer 17. For example, the inner peripheral surface of the shielding braid 19 is in contact with the outer peripheral surface of the outer semiconductive layer 17. The shielding braid 19 is located on the inner peripheral side of the second sheath 21.

[0019] 3 shows the state in which the cable 1 has been manufactured up to the formation of the shield braid 19. For example, one single braid 19A of the shield braid 19 is made of a metal wire such as a copper wire or a copper alloy wire. The other single braid 19B is made of a cotton thread. Alternatively, both single braids 19A and 19B may be made of a metal wire.

[0020] The second sheath 21 is located on the outer periphery of the shield braid 19. For example, the inner periphery of the second sheath 21 and the outer periphery of the shield braid 19 are in contact with each other. Examples of materials for the second sheath 21 include chloroprene rubber and ethylene rubber. The chloroprene rubber used for the second sheath 21 is preferably flame-resistant enough to pass the horizontal test specified in JIS C 3005 4.26.2 a). The ethylene rubber used for the second sheath 21 is preferably an ethylene-propylene rubber mixture, an ethylene-propylene-diene rubber mixture, or an ethylene-vinyl acetate rubber mixture that is flame-resistant enough to pass the inclined test specified in JIS C 3005 4.26.2 b). The thickness of the second sheath 21 is, for example, 0.07 mm or more and 1.3 mm or less. S2 in FIG. 3 illustrates the state in which the second sheath 21 is formed during the manufacturing of the cable 1.

[0021] The reinforcing layer 23 is provided on the outer circumferential side of the second sheath 21. The second sheath 21 is provided on the inner circumferential side of the reinforcing layer 23. For example, the inner circumferential surface of the reinforcing layer 23 and the outer circumferential surface of the second sheath 21 are in contact with each other. The reinforcing layer 23 has holes 24, and the holes 24 penetrate the reinforcing layer 23 in the thickness direction. The thickness direction of the reinforcing layer 23 is the radial direction of the wire core 5. For example, there are a plurality of holes 24. The plurality of holes 24 are, for example, dispersed throughout the entire reinforcing layer 23.

[0022] S3 in FIG. 3 illustrates a state in which the reinforcement layer 23 has been formed and the core 5 has been completed during the manufacture of the cable 1. For example, as shown in S3 in FIG. 3, the reinforcement layer 23 is formed by braiding the fibers 25. In this case, the holes 24 are gaps 24A in the braid of the fibers 25. The braid density of the fibers 25 in the reinforcement layer 23 is preferably, for example, 40% or more and 50% or less. The braid angle of the fibers 25 in the reinforcement layer 23 is preferably, for example, 30 degrees or more. In this case, during the manufacture of the cable 1, the first sheath 3 and the second sheath 21 are easily drawn into the gaps 24A by heating, and the first sheath 3 and the second sheath 21 are in surface contact with each other. Therefore, even if internal stress F2 as shown in FIG. 6B occurs in the cable 1, the first sheath 3 and the second sheath 21 are less likely to separate, thereby suppressing undulation.

[0023] The first sheath 3 and the second sheath 21 are in contact with each other through a gap 24A. The first sheath 3 and the second sheath 21 are preferably made of the same rubber material. In this case, when the cable 1 is manufactured, the first sheath 3 and the second sheath 21 are heated to enter the gap 24A, making it easier for the contact portions of the first sheath 3 and the second sheath 21 to bond. This improves the adhesion between the first sheath 3 and the second sheath 21, and suppresses the undulation phenomenon. There are multiple gaps 24A. The multiple gaps 24A are dispersed throughout the reinforcing layer 23. Examples of materials for the fibers 25 include high-tensile fibers. Preferably, the fibers 25 are high-tensile fibers having a strength of, for example, 6.0 cN / dtex or more and 8.0 cN / dtex or less. Examples of high-tensile fibers include polyester fibers, carbon fibers, and aramid fibers. The reinforcing layer 23 is formed by braiding the high-tensile fibers described above. By forming the reinforcing layer 23 from the fibers 25 made of the high-tensile fibers described above, even when internal stress F2 as shown in FIG. 6B occurs in the cable 1, the first sheath 3 and the second sheath 21 (cores 5) are less likely to separate, thereby suppressing the undulation phenomenon.

[0024] S4 in Fig. 3 shows the completed state of the cable 1 with the first sheath 3 provided. The first sheath 3 is provided on the outer periphery of the core 5. The first sheath 3 and the second sheath 21 contact each other at the holes 24. If there are multiple holes 24, the first sheath 3 and the second sheath 21 contact each other at each of the multiple holes 24. If the reinforcing layer 23 is a braid of fibers 25, the first sheath 3 and the second sheath 21 contact each other at each of the multiple gaps 24A.

[0025] 2. Effects of Cable 1 (1A) The first sheath 3 and the second sheath 21 are in contact with each other at the hole 24. Therefore, the first sheath 3 and the second sheath 21 are in close contact with each other. The second sheath 21 is part of the core 5, so the first sheath 3 and the core 5 are in close contact with each other. Therefore, for example, even if the cable 1 is repeatedly subjected to a compressive force F1 from the guide roller 107 shown in FIG. 5, the core 5 is unlikely to separate from the first sheath 3. As a result, the undulation phenomenon can be suppressed.

[0026] (1B) If the wire core 5 were to separate from the first sheath 3 and be fed in the longitudinal direction of the cable 1 relative to the first sheath 3, the shield braid 19 would break and a ground fault would occur. Because the first sheath 3 and the wire core 5 are closely attached to each other, the wire core 5 is unlikely to separate from the first sheath 3. As a result, the cable 1 can prevent the shield braid 19 from breaking and causing a ground fault.

[0027] (1C) Since the cable 1 includes the reinforcing layer 23, the cable 1 is less likely to twist in the circumferential direction. (1D) The core 5 further includes a shield braid 19 located on the inner circumferential side of the second sheath 21. This allows the electrical characteristics of the cable 1 to be improved.

[0028] (1E) For example, one single braid 19A of shield braid 19 is made of a metal wire such as a copper wire or a copper alloy wire, and the other single braid 19B is made of cotton thread. In this case, shield braid 19 is less likely to break, and the durability of shield braid 19 is high. Note that when single braid 19A and single braid 19B are both made of metal wire, the metal wires rub against each other, and shield braid 19 may break more easily than when single braid 19B is made of cotton thread.

[0029] (1F) Reinforcement layer 23 is formed by braiding fibers 25 made of high-tensile fibers, for example. Holes 24 are gaps 24A in the braiding of fibers 25. In this case, adhesion between first sheath 3 and core 5 is even stronger. Second Embodiment 1. Differences from the first embodiment The second embodiment has the same basic configuration as the first embodiment, so differences will be described below. Note that the same reference numerals as those in the first embodiment indicate the same configuration, and reference will be made to the preceding description.

[0030] In the first embodiment described above, one wire core 5 is disposed inside the first sheath 3. In contrast, the second embodiment differs from the first embodiment in that three wire cores 5 are disposed inside the first sheath 3, as shown in Fig. 4 .

[0031] As shown in Figure 3, in the orthogonal cross section of the cable 1, the three wire cores 5 are aligned in a row. The first sheath 3 is present between the wire cores 5. In the orthogonal cross section of the cable 1, the outer surface of the first sheath 3 basically has a rectangular shape. However, the first sheath 3 has a chamfered shape at the vertices of the rectangle. The three wire cores 5 are aligned parallel to the long sides of the rectangle.

[0032] The cable 1 of the second embodiment is, for example, a flat cab tire cable.The cable 1 of the second embodiment is, for example, a cab tire cable for a reel winding method.

[0033] 2. Effects of Cable 1 According to the second embodiment described above in detail, the effects of the first embodiment described above are achieved.

[0034] <Other embodiments> Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments and can be implemented in various modified forms.

[0035] (1) The number of wire cores 5 arranged inside the first sheath 3 may be a number other than 1 or 3. For example, two or four or more wire cores 5 may be arranged inside the first sheath 3.

[0036] (2) The wire core 5 may not include some of the conductor 11, the inner semiconductive layer 13, the insulator 15, the outer semiconductive layer 17, and the shield braid 19. Furthermore, the wire core 5 may further include other layers in addition to the conductor 11, the inner semiconductive layer 13, the insulator 15, the outer semiconductive layer 17, and the shield braid 19.

[0037] (3) In the second embodiment, the three wire cores 5 do not have to be aligned in a row in the orthogonal cross section of the cable 1. For example, in the orthogonal cross section of the cable 1, the three wire cores 5 may be arranged at the vertices of an equilateral triangle.

[0038] (4) The function of one component in each of the above embodiments may be shared among multiple components, or the functions of multiple components may be performed by one component. Also, part of the configuration of each of the above embodiments may be omitted. Furthermore, at least part of the configuration of each of the above embodiments may be added to or substituted for the configuration of another of the above embodiments.

[0039] (5) In addition to the above-described cable 1, the present disclosure can also be realized in various forms, such as a system including the cable 1 as a component, a method for manufacturing the cable 1, and the like.

[0040] [Technical idea disclosed in this specification] [Item 1] a first sheath; one or more wire cores disposed inside the first sheath; Equipped with The wire core is a reinforcing layer provided on an outer circumferential side of the wire core and made of braided high-tensile fibers; a second sheath provided on the inner circumferential side of the reinforcing layer; Equipped with the reinforcing layer has holes penetrating the reinforcing layer in a thickness direction, the holes are gaps in the braid of high tensile fibers; The first sheath and the second sheath are in contact with each other at the hole. cable. [Item 2] The cable according to item 1, The high-tensile fiber is a polyester fiber, a carbon fiber, or an aramid fiber. cable. [Item 3] The cable according to item 1 or 2, the first sheath and the second sheath are in surface contact at the hole; cable. [Item 4] The cable according to any one of items 1 to 3, The first sheath and the second sheath are made of the same rubber material. cable. [Item 5] The cable according to any one of items 1 to 4, The wire core further includes a shield braid on the inner peripheral side of the second sheath. cable. [Item 6] Item 5. The cable according to item 5, One strand of the shield braid is made of metal wire, and the other strand is made of cotton yarn. cable. [Item 7] The cable according to any one of items 1 to 6, The braid density of the high-tensile fiber is 40% or more and 50% or less, The braiding angle of the high tensile strength fiber is 30 degrees or more. cable. [Item 8] The cable according to any one of items 1 to 7, Two or more of the wire cores are disposed inside the first sheath. cable. [Explanation of symbols]

[0041] 1...cable, 3...first sheath, 5...wire core, 11...conductor, 13...inner semiconductive layer, 15...insulator, 17...outer semiconductive layer, 19...shield braid, 19A, 19B...single strand, 21...second sheath, 23...reinforcing layer, 24...hole, 24A...gap, 25...fiber, 101...cable, 103...moving device, 105...cable reel, 107...guide roller

Claims

1. a first sheath; one or more wire cores disposed inside the first sheath; Equipped with The wire core is a reinforcing layer provided on an outer circumferential side of the wire core and made of braided high-tensile fibers; a second sheath provided on the inner circumferential side of the reinforcing layer; Equipped with the reinforcing layer has holes penetrating the reinforcing layer in a thickness direction, the holes are gaps in the braid of high tensile fibers; the first sheath and the second sheath are in contact with each other at the hole; cable.

2. 10. The cable of claim 1, The high-tensile fiber is a polyester fiber, a carbon fiber, or an aramid fiber. cable.

3. 10. The cable of claim 1, the first sheath and the second sheath are in surface contact with each other at the hole. cable.

4. 10. The cable of claim 1, The first sheath and the second sheath are made of the same rubber material. cable.

5. 10. The cable of claim 1, The wire core further includes a shield braid on the inner peripheral side of the second sheath. cable.

6. 6. The cable of claim 5, One strand of the shield braid is made of metal wire, and the other strand is made of cotton yarn. cable.

7. The cable according to any one of claims 1 to 6, The braid density of the high-tensile fiber is 40% or more and 50% or less, The braiding angle of the high tensile strength fibers is 30 degrees or more. cable.

8. The cable according to any one of claims 1 to 6, Two or more of the wire cores are disposed inside the first sheath. cable.

Images