Composite cable

Abstract

The utility model provides a composite cable which can enable the cross section of the composite cable to be approximately circular even if the number of clamped objects is not necessary. A composite cable is provided with: an assembly in which a first electric wire, a second electric wire, and a third electric wire are twisted; a tape member wound in a spiral shape around the assembly; and an outer sheath. Each of the first electric wire and the second electric wire is provided with a central conductor and an insulator. The third electric wire is provided with a twisted pair formed by twisting two core wires, and an inner sheath. The ratio of the outer diameter of the third electric wire to the outer diameter of the first electric wire and the ratio of the outer diameter of the third electric wire to the outer diameter of the second electric wire are 0.9-1.1, respectively. The twisting direction of the assembly is opposite to the winding direction of the belt member.

Description

Technical Field

[0001] The present disclosure relates to a composite cable. Background Art

[0002] A composite cable is disclosed in Patent Document 1. The composite cable includes an assembly formed by twisting a plurality of electric wires and a plurality of interpositions, a tape member wound around the assembly, and an outer sheath covering the tape member.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2021-86780 Utility Model Content

[0006] Issues to be solved by the utility model

[0007] In order to reduce the number of components constituting a composite cable or to make the composite cable lighter, it is preferable to reduce the amount of intervening materials. However, in conventional composite cables, reducing the amount of intervening materials makes it difficult to make the cross-sectional shape of the composite cable close to a circular shape.

[0008] In one aspect of the present disclosure, it is preferable to provide a composite cable that can have a cross-sectional shape close to a circle even if the amount of intervening objects is not necessarily large.

[0009] Solutions to Problems

[0010] One embodiment of the present disclosure is a composite cable comprising: an assembly formed by twisting first, second, and third electric wires with their outer peripheral surfaces in contact; a tape member spirally wound around the assembly; and an outer sheath covering the tape member.

[0011] The first and second electric wires each include a central conductor and an insulator covering the central conductor. The third electric wire includes a twisted pair of two core wires, and an inner sheath covering the twisted pair. The ratio of the outer diameter of the third electric wire to the outer diameter of the first electric wire and the ratio of the outer diameter of the third electric wire to the outer diameter of the second electric wire are both 0.9 or greater and 1.1 or less. The twisting direction of the assembly is opposite to the winding direction of the tape member.

[0012] In addition, the specific solutions of the present utility model are as follows.

[0013] Option 1 is a composite cable comprising: an assembly formed by twisting a first electric wire, a second electric wire, and a third electric wire in such a manner that their outer peripheral surfaces are in contact; a tape member spirally wound around the above-mentioned assembly; and an outer sheath covering the circumference of the above-mentioned tape member, wherein the above-mentioned first electric wire and the above-mentioned second electric wire each have a central conductor and an insulator covering the above-mentioned central conductor, the above-mentioned third electric wire comprises a twisted pair formed by twisting two core wires, and an inner sheath covering the above-mentioned twisted pair and partially extending between the above-mentioned two core wires, the ratio of the outer diameter of the above-mentioned third electric wire to the outer diameter of the above-mentioned first electric wire, and the ratio of the outer diameter of the above-mentioned third electric wire to the outer diameter of the above-mentioned second electric wire are respectively greater than 0.9 and less than 1.1, and the twisting direction of the above-mentioned assembly is opposite to the winding direction of the above-mentioned tape member.

[0014] Solution 2 is a composite cable based on Solution 1, wherein the thickness of the inner sheath is greater than or equal to the thickness of the insulator in the first electric wire and greater than or equal to the thickness of the insulator in the second electric wire.

[0015] The third embodiment is a composite cable according to the first embodiment, wherein no intervening object is provided between the aggregate and the tape member.

[0016] Option 4 is a composite cable based on Option 1, wherein the center conductors of the first electric wire and the second electric wire are formed by twisting a plurality of conductor wires, and the twisting direction of the plurality of conductor wires is the same as the twisting direction of the two core wires in the twisted pair cable.

[0017] According to the composite cable of one aspect of the present disclosure, even if the amount of the intervening material is not necessarily large, the cross-sectional shape of the composite cable can be made close to a circle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a plan view showing the structure of a composite cable.

[0019] Figure 2 yes Figure 1 Cross-sectional view at section II-II in FIG.

[0020] Figure 3A It is a cross-sectional view showing the outer diameter of the first electric wire and the thickness of the insulator. Figure 3B It is a cross-sectional view showing the outer diameter of the second electric wire and the thickness of the insulator. Figure 3C It is a cross-sectional view showing the outer diameter of the third electric wire and the thickness of the insulator.

[0021] Explanation of symbols

[0022] 1—composite cable, 3—assembly, 5—first electric wire, 7—second electric wire, 9—third electric wire, 11—ribbon component, 13—outer sheath, 21—center conductor, 23—insulator, 25—twisted pair, 27—inner sheath, 29—core wire, 31—conductor, 33—insulator. DETAILED DESCRIPTION

[0023] Embodiments of examples of the present disclosure are described with reference to the accompanying drawings.

[0024] <First embodiment>

[0025] 1. Structure of composite cable 1

[0026] based on Figure 1 、 Figure 2 、 Figure 3A 、 Figure 3B ,as well as Figure 3C The structure of the composite cable 1 will be described. The composite cable 1 is used in vehicles such as automobiles and railway vehicles. Figure 1 As shown, the composite cable 1 is a linear component. In any cross section perpendicular to the longitudinal direction of the composite cable 1, the composite cable 1 has Figure 2 The structure shown.

[0027] The composite cable 1 includes an assembly 3. The assembly 3 is composed of a first wire 5, a second wire 7, and a third wire 9. The first wire 5, the second wire 7, and the third wire 9 are twisted together. The outer peripheral surfaces of the first wire 5, the second wire 7, and the third wire 9 are in contact with each other. Specifically, the outer peripheral surface of the first wire 5 is in contact with the outer peripheral surface of the second wire 7. Furthermore, the outer peripheral surface of the second wire 7 is in contact with the outer peripheral surface of the third wire 9. Furthermore, the outer peripheral surface of the first wire 5 is in contact with the outer peripheral surface of the third wire 9.

[0028] The composite cable 1 includes a tape member 11. The tape member 11 is wound around the assembly 3. The tape member 11 is an elongated, strip-shaped member. The tape member 11 is helically wound with portions of its width overlapping. The direction of winding of the tape member 11 is opposite to the twisting direction of the assembly 3.

[0029] For example, since the first electric wire 5, the second electric wire 7, and the third electric wire 9 are twisted together, Figure 1 When viewed from the Q direction shown in FIG. 1 , the belt member 11 extends in the P direction while rotating clockwise. Figure 1When viewed in the Q direction shown, the composite cable 1 extends in the P direction while rotating counterclockwise. The P and Q directions are parallel to the longitudinal direction of the composite cable 1. In this case, the twisting direction of the assembly 3 is clockwise. The winding direction of the tape member 11 is counterclockwise. Therefore, the winding direction of the tape member 11 is opposite to the twisting direction of the assembly 3. Alternatively, the twisting direction of the assembly 3 may be counterclockwise while the winding direction of the tape member 11 may be clockwise.

[0030] The tape member 11 is in contact with the aggregate 3 and an outer sheath 13 described below. The tape member 11 is, for example, a paper tape, a nonwoven tape, or a resin tape. No intervening object is provided between the aggregate 3 and the tape member 11.

[0031] The composite cable 1 includes an outer sheath 13. The outer sheath 13 covers the circumference of the belt member 11. Examples of materials for the outer sheath 13 include thermoplastic resins and rubbers. Examples of thermoplastic resins include thermoplastic polyurethanes. Furthermore, examples of rubbers include ethylene propylene diene monomer (EPDM). Thermoplastic resins and rubbers may or may not be cross-linked. The thickness of the outer sheath 13 is preferably not less than 0.3 mm and not more than 3.0 mm.

[0032] The first electric wire 5 includes a central conductor 21 and an insulator 23. The central conductor 21 is formed, for example, by twisting together multiple conductor wires. The central conductor 21 is made, for example, of copper or a copper alloy. The insulator 23 covers the central conductor 21. The insulator 23 is made, for example, of polyethylene. The second electric wire 7 also has the same structure as the first electric wire 5. The first electric wire 5 and the second electric wire 7 are, for example, power cables for an electric brake or an electric parking brake.

[0033] The third electric wire 9 includes a twisted pair 25 and an inner sheath 27. The twisted pair 25 is constructed by twisting two core wires 29. Each of the two core wires 29 includes a conductor 31 and an insulator 33. The conductor 31 is formed by twisting multiple conductor wires, for example. The conductor 31 is made of, for example, copper or a copper alloy. The insulator 33 is made of, for example, polyethylene. The two core wires 29 are signal wires for an ABS sensor, for example. The inner sheath 27 covers the twisted pair 25. The inner sheath 27 is made of, for example, thermoplastic polyurethane. A portion of the inner sheath 27 extends between the two core wires 29. More specifically, a portion of the inner sheath 27 extends into the valley formed by the contact between the two core wires 29. In other words, the third electric wire 9 is a multi-core electric wire with a solid structure. The twist direction of the two core wires 29 in the twisted pair 25 is opposite to the twist direction of the first electric wire 5, the second electric wire 7, and the third electric wire 9 in the assembly 3. The twisting direction of the plurality of conductor wires in the center conductor 21 of the first electric wire 5 and the second electric wire 7 is the same as the twisting direction of the two core wires 29 in the twisted pair 25. The twisting direction of the two core wires 29 in the twisted pair 25 is opposite to the twisting direction of the plurality of conductor wires in the conductor 31 of the two core wires 29.

[0034] like Figure 3A As shown in FIG. 1 , the outer diameter of the first electric wire 5 is set to R1. Also, the thickness of the insulator 23 in the first electric wire 5 is set to r1. Figure 3B As shown in FIG. 1 , the outer diameter of the second electric wire 7 is set to R2. Also, the thickness of the insulator 23 in the second electric wire 7 is set to r2. Figure 3C As shown, the outer diameter of the third electric wire 9 is set to R3. The thickness of the inner sheath 27 of the third electric wire 9 is set to r3. The outer diameter of the twisted pair 25 is set to r4. Figure 3A 、 Figure 3B 、 Figure 3C Each of them is a cross-sectional view taken at a cross section perpendicular to the longitudinal direction of the composite cable 1. r3 is represented by the following (Equation 1).

[0035] (Formula 1) r3 = (R3 - r4) / 2

[0036] The outer diameter r4 of the twisted pair 25 is the sum of the outer diameters of one core wire 29 and the other core wire 29. The ratio of the outer diameter R3 of the third electric wire 9 to the outer diameter R1 of the first electric wire 5 is R3 / R1. The ratio of the outer diameter R3 of the third electric wire 9 to the outer diameter R2 of the second electric wire 7 is R3 / R2. The value of R3 / R1 is 0.9 or more and 1.1 or less. The value of R3 / R1 is preferably 0.92 or more and 1.08 or less, more preferably 0.95 or more and 1.05 or less, and particularly preferably 0.98 or more and 1.02 or less.

[0037] The value of R3 / R2 is 0.9 or greater and 1.1 or less. The value of R3 / R2 is preferably 0.92 or greater and 1.08 or less, more preferably 0.95 or greater and 1.05 or less, and particularly preferably 0.98 or greater and 1.02 or less. For example, the thickness r3 is greater than the thickness r1. For example, the thickness r3 is greater than the thickness r2.

[0038] 2. Effects of Composite Cable 1

[0039] (1A) In the composite cable 1 , the value of R3 / R1 is 0.9 or more and 1.1 or less. Furthermore, the value of R3 / R2 is 0.9 or more and 1.1 or less. Furthermore, the winding direction of the tape member 11 is opposite to the twisting direction of the assembly 3 .

[0040] Therefore, in the composite cable 1 , even when the amount of the intervening material is not necessarily large, the cross-sectional shape of the composite cable 1 can be made close to a circle.

[0041] When the cross-section of the composite cable 1 is approximately circular, the removal of the outer sheath 13 is facilitated. Furthermore, when the composite cable 1 is passed through a grommet or rubber tube for securing, a cross-section of the composite cable 1 that is approximately circular increases the contact area between the outer circumference of the composite cable 1 and the inner circumference of the grommet or rubber tube. Consequently, the force required to secure the composite cable 1 to the grommet or rubber tube increases.

[0042] Furthermore, valleys between adjacent wires exist on the outer peripheral surface of the assembly 3. Specifically, the valleys between the first wire 5 and the second wire 7, the valleys between the second wire 7 and the third wire 9, and the valleys between the third wire 9 and the first wire 5 exist on the outer peripheral surface of the assembly 3.

[0043] The valleys between the wires extend helically on the outer circumference of the assembly 3, along the twist direction of the assembly 3. If the winding direction of the tape member 11 is opposite to the twist direction of the assembly 3, the direction of the valleys between the wires and the longitudinal direction of the tape member 11 become inconsistent, intersecting the two. Consequently, the tape member 11 has difficulty entering the valleys between the wires. As a result, the cross-sectional shape of the composite cable 1 becomes even closer to a circle.

[0044] (1B) As described above, in the composite cable 1 , even when the amount of intervening materials is not necessarily large, the cross-sectional shape of the composite cable 1 can be made close to a circle. Therefore, the amount of intervening materials in the composite cable 1 can be reduced.

[0045] When processing the end of the composite cable 1 for connection to a connector, etc., it is necessary to remove the intervening material serving as insulation. Reducing the amount of intervening material facilitates the removal process. Furthermore, reducing the amount of intervening material can reduce the number of components comprising the composite cable 1, making the composite cable 1 lighter.

[0046] <Other embodiments>

[0047] As mentioned above, although embodiment of this disclosure was described, this disclosure is not limited to the said embodiment, Various deformation|transformation are possible and it can be implemented.

[0048] (1) In the first embodiment, the composite cable 1 does not include an intervening object. The composite cable 1 may include an intervening object.

[0049] (2) The functions of one component in each of the above embodiments may be shared by multiple components, or the functions of multiple components may be performed by one component. Furthermore, a portion of the structure of each of the above embodiments may be omitted. Furthermore, at least a portion of the structure of each of the above embodiments may be added to or replaced with the structure of another of the above embodiments.

[0050] (3) In addition to the above-described composite cable 1 , the present disclosure can be implemented in various forms such as a system including the composite cable 1 as a component and a method for manufacturing the composite cable 1 .

Claims

1. A composite cable, characterized in that: have: an assembly formed by twisting a first electric wire, a second electric wire, and a third electric wire so that their outer peripheral surfaces are in contact; a belt member spirally wound around the aggregate; and An outer sheath covering the periphery of the belt member, The first electric wire and the second electric wire each include a central conductor and an insulator covering the central conductor. The third electric wire includes a twisted pair of wires formed by twisting two core wires, and an inner sheath covering the twisted pair of wires and partially entering between the two core wires. The ratio of the outer diameter of the third electric wire to the outer diameter of the first electric wire and the ratio of the outer diameter of the third electric wire to the outer diameter of the second electric wire are both 0.9 or more and 1.1 or less. The twisting direction of the aggregate is opposite to the winding direction of the tape member.

2. The composite cable according to claim 1, wherein: The thickness of the inner sheath is equal to or greater than the thickness of the insulator in the first electric wire and equal to or greater than the thickness of the insulator in the second electric wire.

3. The composite cable according to claim 1, wherein: No intervening object is provided between the aggregate and the belt member.

4. The composite cable according to claim 1, wherein The central conductors of the first electric wire and the second electric wire are formed by twisting a plurality of conductor wires. The twisting direction of the plurality of conductor wires is the same as the twisting direction of the two core wires in the twisted pair wire.

Images