WO2013108895A1 - ケーブル - Google Patents
ケーブル Download PDFInfo
- Publication number
- WO2013108895A1 WO2013108895A1 PCT/JP2013/050987 JP2013050987W WO2013108895A1 WO 2013108895 A1 WO2013108895 A1 WO 2013108895A1 JP 2013050987 W JP2013050987 W JP 2013050987W WO 2013108895 A1 WO2013108895 A1 WO 2013108895A1
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- WIPO (PCT)
- Prior art keywords
- conductor
- sheath
- insulator
- cable
- adhesion force
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/026—Alloys based on copper
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/302—Polyurethanes or polythiourethanes; Polyurea or polythiourea
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/307—Other macromolecular compounds
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0009—Details relating to the conductive cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
Definitions
- the present invention relates to a cable having a pair of insulated wires twisted together.
- ABS sensor cables that transmit signals generated by wheel speed sensors have a structure in which two insulated wires are twisted together and the outer periphery is covered with a sheath. ing.
- this type of cable two insulated wires obtained by extrusion-coating an insulator on a stranded conductor are twisted to form a twisted pair, and then an inner sheath is extrusion-coated on the outer periphery.
- a sheath-extruded sheath is known (for example, see Patent Document 1).
- the outer sheath and the inner sheath are cut and pulled in the axial direction.
- the insulator of the insulated wire since the insulator of the insulated wire is in close contact with the inner sheath, when the outer sheath and the inner sheath are pulled out, the insulator of the insulated wire may also be pulled and stretched. Then, when the outer sheath and the inner sheath are removed, the lengths of the insulators of the insulated wires become uneven, and after that, when the insulator is removed and the conductors of the insulated wires are exposed, the exposed dimension becomes the predetermined dimension. Therefore, there was a risk of terminal processing failure.
- An object of the present invention is to provide a cable that can be satisfactorily processed by aligning the exposed dimension of a conductor to a predetermined dimension during terminal processing.
- the cable of the present invention capable of solving the above problems is A cable in which a pair of insulated wires covered with an insulator are twisted together, and the periphery of these insulated wires is covered with a sheath composed of an inner sheath and an outer sheath,
- the conductor is formed by assembling a plurality of twisted wires obtained by twisting a plurality of strands and twisting them together.
- the adhesion between the conductor and the insulator is preferably 32 N / 35 mm or more.
- the ratio of the adhesion force between the conductor and the insulator to the adhesion force between the insulated wire and the sheath is 0.59 or more.
- a plurality of twisted wires obtained by twisting a plurality of strands are assembled together, and further twisted together to form a conductor, thereby forming a large number of fine irregularities on the outer peripheral surface of the conductor. Is done. Thereby, the insulator extruded around the conductor bites into the irregularities on the surface of the conductor. In addition, the contact area between the conductor covering the conductor and the conductor increases. As a result, the adhesion between the conductor and the insulator is increased. Thereby, when the sheath is removed, the insulator is held by the conductor, and the elongation of the insulator can be suppressed.
- the insulation length of the insulated wire is uniform, and when the insulation is removed and the conductor of the insulated wire is exposed, the exposed dimension of the conductor is aligned to a predetermined dimension and good end processing is performed. be able to.
- the cable 10 according to the present embodiment has a pair of insulated wires 1.
- This cable 10 is used as an ABS sensor cable for transmitting a signal generated by a wheel speed sensor in various control systems such as ABS.
- the cable 10 can be used other than the ABS sensor cable.
- An insulated wire 1 constituting the cable 10 includes a conductor 4 and an insulator 5 covering the outer periphery thereof. The pair of insulated wires 1 are twisted together.
- Conductor 4 is made of a tin-copper alloy, for example, the cross-sectional area is 0.18 mm 2 or more 0.30 mm 2 or less.
- the tin concentration in the tin-copper alloy of the conductor 4 is, for example, 0.2% by mass or more and 0.6% by mass or less.
- the conductor 4 may be an annealed copper wire or a hard copper wire.
- the conductor 4 is formed by assembling a plurality of stranded wires 4a and twisting them together. Furthermore, the stranded wire 4a which comprises the conductor 4 is comprised by twisting together the several strand 4b. That is, the conductor 4 is configured by assembling a plurality of stranded wires 4a obtained by twisting a plurality of strands 4b and twisting them together.
- the strand 4b constituting the stranded wire 4a has an outer diameter of about 0.08 mm, for example, and the stranded wire 4a is configured by, for example, 16 strands 4b twisted together.
- the conductor 4 is comprised, for example by twisting together the three twisted wires 4a. Thereby, the conductor 4 is comprised from the 48 strand 4b in total, for example, and the outer diameter is about 0.82 mm.
- the insulator 5 covering the conductor 4 is made of, for example, cross-linked flame retardant polyethylene (PE).
- PE cross-linked flame retardant polyethylene
- the outer diameter of the insulated wire 1 which is the outer diameter of the insulator 5 is about 1.4 mm. Thereby, the outer diameter of the twist of the pair of insulated wires 1 twisted together is about 2.8 mm.
- the periphery of the pair of insulated wires 1 twisted together is covered with a sheath 6.
- the sheath 6 has a two-layer structure including an inner sheath 2 that is an interposition and an outer sheath 3 that is an outer sheath.
- the inner sheath 2 is extrusion-coated around a pair of insulated wires 1 and is made of, for example, crosslinked flame retardant polyethylene (PE).
- PE crosslinked flame retardant polyethylene
- the inner sheath 2 also has a function of improving the roundness in the cross section of the cable 10.
- the outer diameter of the inner sheath 2 is about 3.4 mm.
- the outer sheath 3 is extrusion-coated around the inner sheath 2, and is formed of, for example, a crosslinked flame-retardant thermoplastic polyurethane (TPU).
- TPU thermoplastic polyurethane
- the outer diameter of the cable 10 that is the outer diameter of the outer sheath 3 is a small diameter of about 4.0 mm.
- the conductor 4 is configured by further twisting a plurality of stranded wires 4a obtained by twisting a plurality of strands 4b together.
- the conductor 4 fine unevenness
- corrugation is formed in the outer peripheral surface.
- the concave portion is a spiral groove 7 between the stranded wires 4a, and the convex portion is the outermost portion 8 of the stranded wire 4a.
- the insulator 5 that is extrusion-coated around the conductor 4 bites into the irregularities around the conductor 4.
- the insulator 5 has a large contact area at the interface with the conductor 4. As a result, the adhesion between the conductor 4 and the insulator 5 is increased.
- the adhesive force between the conductor 4 and the insulator 5 becomes 32 N / 35 mm or more.
- the ratio of the adhesion force between the conductor 4 and the insulator 5 to the adhesion force between the insulated wire 1 and the sheath 6 (adhesion force between the insulator 5 and the inner sheath 2) is 0.59 or more.
- the pair of insulated wires 1 are twisted together, and the inner sheath 2 is formed by extrusion-coating a cross-linked flame-retardant polyethylene around the pair.
- the unevenness (twisted wave) on the surface where the insulated wires 1 are twisted together is filled to form a round wire having a substantially circular cross section.
- the outer sheath 3 is formed by extrusion-coating a crosslinked flame-retardant thermoplastic polyurethane around the inner sheath 2.
- the pair of insulated wires 1 is covered with the sheath 6 including the inner sheath 2 and the outer sheath 3 to form the cable 10.
- the sheath 6 including the outer sheath 3 and the inner sheath 2 is cut from the end portion at a predetermined length and pulled out in the axial direction to expose the insulated wire 1. Let Thereafter, the insulator 5 of the exposed insulated wire 1 is removed, and the conductor 4 is exposed with a predetermined dimension.
- each insulator 5 of the insulated wire 1 Since the insulator 5 of the insulated wire 1 is in close contact with the inner sheath 2, when the sheath 6 is pulled out with a cable having a conventional structure, as shown in FIG. 2A, each insulator 5 of each insulated wire 1. In this case, a pulling force F is generated due to the close contact with the sheath 6 to be pulled out. Further, in each insulated wire 1, each insulator 5 has a drag force f that opposes the pulling force F due to an adhesion force between the conductor 4. At this time, if the adhesion force of the insulator 5 to the conductor 4 is small, the drag force f is also small.
- the respective insulators 5 of the respective insulated wires 1 are pulled out. And the length of the insulator 5 of the insulated wire 1 may be uneven. Then, when the insulator 5 is removed after that and the conductor 4 of the insulated wire 1 is exposed, the exposed dimension of the conductor 4 does not become a predetermined dimension, resulting in poor terminal processing.
- the conductor 4 is formed by twisting a plurality of stranded wires 4a obtained by twisting a plurality of strands 4b to each other. Is formed. Therefore, the insulator 5 bites into the irregularities around the conductor 4, the contact area of the interface between the conductor 5 and the conductor 4 covering the conductor 4 is increased, and the adhesion between the conductor 4 and the insulator 5 is increased. Can be increased. Specifically, the adhesion force between the conductor 4 and the insulator 5 can be 32 N / 35 mm or more.
- the ratio of the adhesion force between the conductor 4 and the insulator 5 to the adhesion force between the insulated wire 1 and the sheath 6 is increased.
- the ratio of the adhesion force between the conductor 4 and the insulator 5 to the adhesion force between the insulated wire 1 and the sheath 6 can be 0.59 or more.
- the sum (2f) of the drag force f of the two insulated wires 1 that opposes the sum (2F) of the tensile force due to the adhesion between the conductor 4 ) Increases and the drag force 2f for two pieces is equal to or greater than the pulling force 2F (2F ⁇ 2f), the elongation of the insulator 5 when the sheath 6 is removed can be suppressed. Therefore, the length of the insulator 5 of the insulated wire 1 after the removal of the sheath 6 is made uniform, and when the insulator 5 is removed and the conductor 4 of the insulated wire 1 is exposed, the exposed dimension of the conductor 4 is set to a predetermined dimension. Good terminal processing can be performed by aligning them.
- Example 1 (1) Cable outer diameter: 4.0mm (2) Conductor Conductor size: 0.25 mm 2 , Conductor configuration: Three twisted wires obtained by twisting 16 strands having an outer diameter of 0.08 mm are further twisted, Material: Tin copper alloy, Twist outer diameter: 0 .82mm (3) Insulator Material: Cross-linked flame retardant polyethylene (PE), outer diameter: 1.4 mm, twisted outer diameter: 2.8 mm (4) Sheath (4-1) Inner sheath Material: Cross-linked flame retardant polyethylene (PE), outer diameter: 3.4mm (4-2) External sheath Material: Cross-linked flame retardant thermoplastic polyurethane (TPU), outer diameter: 4.0 mm
- Example 2 (1) Cable outer diameter: 4.0mm (2) Conductor Conductor size: 0.25 mm 2 , Conductor configuration: Three twisted wires obtained by twisting 16 strands having an outer diameter of 0.08 mm are further twisted, Material: Tin copper alloy, Twist outer diameter: 0 .82mm (3) Insulator Material: Cross-linked flame retardant polyethylene (PE), outer diameter: 1.4 mm, twisted outer diameter: 2.8 mm (4) Sheath (4-1) Inner sheath Material: Thermoplastic polyurethane (TPU), outer diameter: 3.4mm (4-2) Outer sheath Material: Thermoplastic polyurethane (TPU), outer diameter: 4.0 mm
- Example 3 (1) Cable outer diameter: 4.3mm (2) Conductor Conductor size: 0.25 mm 2 , Conductor configuration: Three twisted wires obtained by twisting 16 strands having an outer diameter of 0.08 mm are further twisted, Material: Tin copper alloy, Twist outer diameter: 0 .82mm (3) Insulator Material: Cross-linked flame retardant polyethylene (PE), outer diameter: 1.45 mm, twisted outer diameter: 2.9 mm (4) Sheath (4-1) Inner sheath Material: Thermoplastic polyurethane (TPU), outer diameter: 3.6mm (4-2) Outer sheath Material: Thermoplastic polyurethane (TPU), outer diameter: 4.3 mm
- Example 4 (1) Cable outer diameter: 3.4mm (2) Conductor Conductor size: 0.18 mm 2 , Conductor configuration: Three twisted wires obtained by twisting 12 strands having an outer diameter of 0.08 mm are further twisted, Material: Tin-copper alloy, Twist outer diameter: 0 .71mm (3) Insulator Material: Cross-linked flame retardant polyethylene (PE), outer diameter: 1.2 mm, twisted outer diameter: 2.4 mm (4) Sheath (4-1) Inner sheath Material: Thermoplastic polyurethane (TPU), outer diameter: 2.9mm (4-2) Outer sheath Material: Thermoplastic polyurethane (TPU), outer diameter: 3.4 mm
- Adhesion force measurement (1-1) Adhesion force between insulated wire and sheath As shown in FIG. 3, a pair of insulated wires exposed from the end of the cable 10 with the length of the sheath 6 being 35 mm 1 is passed through an insertion hole 21 a formed in the die 21, and the die 21 is brought into contact with the end surface of the sheath 6. The front ends of the pair of insulated wires 1 are clamped by the clamper 22 and the clamper 22 is pulled in a direction away from the die 21 (in the direction of the arrow in FIG. 3). Thereby, the insulated wire 1 is pulled out from the sheath 6 over a length of 35 mm.
- rate at the time of extracting the insulated wire 1 from the sheath 6 shall be 100 mm / min. (1-2) Adhesion between Conductor and Insulator As shown in FIG. 4, the conductor 4 exposed from the end of the insulated wire 1 with the length of the insulator 5 portion being 35 mm is formed on the die 31. The die 31 is brought into contact with the end surface of the insulator 5 through the insertion hole 31a. The tip of the conductor 4 is clamped by the clamper 32, and the clamper 32 is pulled in a direction away from the die 31 (in the direction of the arrow in FIG. 4).
- Adhesion force ratio Ratio of adhesion force (adhesion force 2) between conductor 4 and insulator 5 to adhesion force (adhesion force 1) between insulated wire 1 and sheath 6 (adhesion force 2 / adhesion force 1) Is calculated.
- Elongation measurement The elongation dimension of the insulator 5 when the inner sheath 2 and the outer sheath 3 constituting the sheath 6 are simultaneously removed to expose the insulated wire 1 is measured.
- Example 1 the adhesion force (adhesion force 1) between the insulated wire 1 and the sheath 6 was 60 N / 35 mm. Further, the adhesion force (adhesion force 2) between the conductor 4 and the insulator 5 was 37 N / 35 mm. The ratio of these adhesion forces (adhesion force 2 / adhesion force 1) was 0.61. Further, the extension dimension of the insulator 5 when the inner sheath 2 and the outer sheath 3 were simultaneously removed to expose the insulated wire 1 was 0 mm to 0.3 mm. In Example 2, the adhesion force (adhesion force 1) between the insulated wire 1 and the sheath 6 was 63 N / 35 mm.
- the adhesion force (adhesion force 2) between the conductor 4 and the insulator 5 was 37 N / 35 mm.
- the ratio of these adhesion forces (adhesion force 2 / adhesion force 1) was 0.59.
- the extension dimension of the insulator 5 when the inner sheath 2 and the outer sheath 3 were simultaneously removed to expose the insulated wire 1 was 0.3 mm to 0.5 mm.
- the adhesion force (adhesion force 1) between the insulated wire 1 and the sheath 6 was 61 N / 35 mm.
- the adhesion force (adhesion force 2) between the conductor 4 and the insulator 5 was 41 N / 35 mm.
- the ratio of these adhesion forces was 0.67. Further, the extension dimension of the insulator 5 when the inner sheath 2 and the outer sheath 3 were simultaneously removed to expose the insulated wire 1 was 0 mm to 0.2 mm. In Example 4, the adhesion force (adhesion force 1) between the insulated wire 1 and the sheath 6 was 53 N / 35 mm. Further, the adhesion force (adhesion force 2) between the conductor 4 and the insulator 5 was 32 N / 35 mm. The ratio of these adhesion forces (adhesion force 2 / adhesion force 1) was 0.60.
- the extension dimension of the insulator 5 when the inner sheath 2 and the outer sheath 3 were simultaneously removed to expose the insulated wire 1 was 0 mm to 0.3 mm.
- the adhesion force between the conductor 4 and the insulator 5 was a high value (a high value of 32 N / 35 mm or more), and the adhesion force ratio was 0.59 or more.
- the extension dimension of the insulator 5 when the inner sheath 2 and the outer sheath 3 are simultaneously removed to expose the insulated wire 1 is 1 mm or less, and all pass ( ⁇ ). became.
- Comparative Examples 1 to 3 In Comparative Example 1, the adhesion force (adhesion force 1) between the insulated wire 1 and the sheath 6 was 60 N / 35 mm. Further, the adhesion force (adhesion force 2) between the conductor 4 and the insulator 5 was 20 N / 35 mm. The ratio of these adhesion forces (adhesion force 2 / adhesion force 1) was 0.33. Further, the extension dimension of the insulator 5 when the inner sheath 2 and the outer sheath 3 were simultaneously removed to expose the insulated wire 1 was 1.0 mm to 1.2 mm. In Comparative Example 2, the adhesion force (adhesion force 1) between the insulated wire 1 and the sheath 6 was 58 N / 35 mm.
- the adhesion force (adhesion force 2) between the conductor 4 and the insulator 5 was 19 N / 35 mm.
- the ratio of these adhesion forces (adhesion force 2 / adhesion force 1) was 0.33.
- the extension dimension of the insulator 5 when the inner sheath 2 and the outer sheath 3 were simultaneously removed to expose the insulated wire 1 was 1.0 mm to 1.5 mm.
- the adhesion force (adhesion force 1) between the insulated wire 1 and the sheath 6 was 53 N / 35 mm.
- the adhesive force (adhesive force 2) between the conductor 4 and the insulator 5 was 17 N / 35 mm.
- the ratio of these adhesion forces was 0.32. Further, the extension dimension of the insulator 5 when the inner sheath 2 and the outer sheath 3 were simultaneously removed to expose the insulated wire 1 was 1.5 mm to 2.0 mm. As described above, in Comparative Examples 1 to 3, the adhesion strength between the conductor 4 and the insulator 5 was a low value (a value lower than 32 N / 35 mm), and the adhesion strength ratio was lower than 0.59. In Comparative Examples 1 to 3, the inner sheath 2 and the outer sheath 3 were removed at the same time to expose the insulated wire 1, so that the elongation dimension of the insulator 5 exceeded 1 mm, and all failed ( ⁇ )
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Abstract
Description
この種のケーブルとしては、撚線導体に絶縁体を押出被覆した2本の絶縁電線を撚り合わせてツイストペアとした後、その外周に内部シースを押出被覆し、次いで、この内部シースの外周に外部シースを押出被覆したものが知られている(例えば、特許文献1参照)。
導体を絶縁体で覆った一対の絶縁電線を互いに撚り合わせ、これらの絶縁電線の周囲を内部シース及び外部シースからなるシースで覆ったケーブルであって、
前記導体は、複数本の素線を互いに撚り合わせた撚線を複数本集合させてさらに互いに撚り合わせてなることを特徴とする。
これにより、シースを除去する際に絶縁体が導体に保持されて、絶縁体の伸びを抑制することができる。したがって、シースの除去後における絶縁電線の絶縁体の長さが揃い、絶縁体を除去して絶縁電線の導体を露出させる際に、導体の露出寸法を所定寸法に揃えて良好な端末加工を行うことができる。
図1に示すように、本実施形態に係るケーブル10は、一対の絶縁電線1を有している。
このケーブル10を構成する絶縁電線1は、導体4とその外周を覆う絶縁体5からなる。一対の絶縁電線1は互いに撚り合わせられている。
撚線4aを構成する素線4bは、例えば、外径0.08mm程度とされており、撚線4aは、例えば、16本の素線4bを互いに撚り合わせて構成されている。そして、導体4は、例えば、3本の撚線4aを撚り合わせて構成されている。これにより、導体4は、例えば、合計で48本の素線4bから構成され、その外径は、約0.82mmとされている。
内部シース2は、一対の絶縁電線1の周囲に押出被覆されたものであり、例えば、架橋難燃ポリエチレン(PE)から形成されている。内部シース2は、ケーブル10の横断面における真円度を向上させる機能も有する。そして、この内部シース2の外径は、約3.4mmとされている。
次に、内部シース2の周囲に、架橋難燃熱可塑性ポリウレタンを押出被覆することにより、外部シース3を形成する。これにより、内部シース2と外部シース3とからなるシース6によって一対の絶縁電線1が被覆されてケーブル10となる。
(実施例1)
(1)ケーブル外径:4.0mm
(2)導体
導体サイズ:0.25mm2、導体構成:外径0.08mmの素線を16本撚り合わせた3本の撚線をさらに撚り合わせる、材質:錫銅合金、撚外径:0.82mm
(3)絶縁体
材質:架橋難燃ポリエチレン(PE)、外径:1.4mm、撚外径:2.8mm
(4)シース
(4-1)内部シース
材質:架橋難燃ポリエチレン(PE)、外径:3.4mm
(4-2)外部シース
材質:架橋難燃熱可塑性ポリウレタン(TPU)、外径:4.0mm
(1)ケーブル外径:4.0mm
(2)導体
導体サイズ:0.25mm2、導体構成:外径0.08mmの素線を16本撚り合わせた3本の撚線をさらに撚り合わせる、材質:錫銅合金、撚外径:0.82mm
(3)絶縁体
材質:架橋難燃ポリエチレン(PE)、外径:1.4mm、撚外径:2.8mm
(4)シース
(4-1)内部シース
材質:熱可塑性ポリウレタン(TPU)、外径:3.4mm
(4-2)外部シース
材質:熱可塑性ポリウレタン(TPU)、外径:4.0mm
(1)ケーブル外径:4.3mm
(2)導体
導体サイズ:0.25mm2、導体構成:外径0.08mmの素線を16本撚り合わせた3本の撚線をさらに撚り合わせる、材質:錫銅合金、撚外径:0.82mm
(3)絶縁体
材質:架橋難燃ポリエチレン(PE)、外径:1.45mm、撚外径:2.9mm
(4)シース
(4-1)内部シース
材質:熱可塑性ポリウレタン(TPU)、外径:3.6mm
(4-2)外部シース
材質:熱可塑性ポリウレタン(TPU)、外径:4.3mm
(1)ケーブル外径:3.4mm
(2)導体
導体サイズ:0.18mm2、導体構成:外径0.08mmの素線を12本撚り合わせた3本の撚線をさらに撚り合わせる、材質:錫銅合金、撚外径:0.71mm
(3)絶縁体
材質:架橋難燃ポリエチレン(PE)、外径:1.2mm、撚外径:2.4mm
(4)シース
(4-1)内部シース
材質:熱可塑性ポリウレタン(TPU)、外径:2.9mm
(4-2)外部シース
材質:熱可塑性ポリウレタン(TPU)、外径:3.4mm
(1)ケーブル外径:4.0mm
(2)導体
導体サイズ:0.25mm2、導体構成:外径0.08mmの素線を48本撚り合わせた撚線、材質:錫銅合金、撚外径:0.65mm
(3)絶縁体
材質:架橋難燃ポリエチレン(PE)、外径:1.4mm、撚外径:2.8mm
(4)シース
(4-1)内部シース
材質:架橋難燃ポリエチレン(PE)、外径:3.4mm
(4-2)外部シース
材質:架橋難燃熱可塑性ポリウレタン(TPU)、外径:4.0mm
(1)ケーブル外径:4.0mm
(2)導体
導体サイズ:0.25mm2、導体構成:外径0.08mmの素線を48本撚り合わせた撚線、材質:錫銅合金、撚外径:0.65mm
(3)絶縁体
材質:架橋難燃ポリエチレン(PE)、外径:1.4mm、撚外径:2.8mm
(4)シース
(4-1)内部シース
材質:熱可塑性ポリウレタン(TPU)、外径:3.4mm
(4-2)外部シース
材質:熱可塑性ポリウレタン(TPU)、外径:4.0mm
(1)ケーブル外径:3.4mm
(2)導体
導体サイズ:0.18mm2、導体構成:外径0.08mmの素線を36本撚り合わせた撚線、材質:錫銅合金、撚外径:0.56mm
(3)絶縁体
材質:架橋難燃ポリエチレン(PE)、外径:1.2mm、撚外径:2.4mm
(4)シース
(4-1)内部シース
材質:熱可塑性ポリウレタン(TPU)、外径:2.9mm
(4-2)外部シース
材質:熱可塑性ポリウレタン(TPU)、外径:3.4mm
(1)密着力測定
(1-1)絶縁電線とシースとの密着力
図3に示すように、シース6の部分の長さを35mmとしたケーブル10の端部から露出された一対の絶縁電線1をダイス21に形成された挿通孔21aに通し、ダイス21をシース6の端面に当接させる。一対の絶縁電線1の先端をクランパ22でクランプし、クランパ22をダイス21から離間する方向(図3中矢印方向)へ引っ張る。これにより、35mmの長さにわたりシース6から絶縁電線1を引き抜く。このときの最大の力を密着力として測定する。なお、絶縁電線1をシース6から引き抜く際の引き抜き速度は、100mm/分とする。
(1-2)導体と絶縁体との密着力
図4に示すように、絶縁体5の部分の長さを35mmとした絶縁電線1の端部から露出された導体4をダイス31に形成された挿通孔31aに通し、ダイス31を絶縁体5の端面に当接させる。導体4の先端をクランパ32でクランプし、クランパ32をダイス31から離間する方向(図4中矢印方向)へ引っ張る。これにより、35mmの長さにわたり絶縁体5から導体4を引き抜く。このときの最大の力を密着力として測定する。なお、導体4を絶縁体5から引き抜く際の引き抜き速度は、100mm/分とする。
(1-3)密着力比
絶縁電線1とシース6との密着力(密着力1)に対する導体4と絶縁体5との密着力(密着力2)の比(密着力2/密着力1)を算出する。
(2)伸び測定
シース6を構成する内部シース2及び外部シース3を同時に除去して絶縁電線1を露出させた際の絶縁体5の伸び寸法を測定する。
(3)良否判定
シース6を構成する内部シース2及び外部シース3を同時に除去して絶縁電線1を露出させた際の絶縁体5の伸びが1mm以下である場合を合格(○)とし、絶縁体5の伸びが1mmを超える場合を不合格(×)とする。
上記の測定結果及び判定結果を表2に示す。
実施例1では、絶縁電線1とシース6との密着力(密着力1)は60N/35mmであった。また、導体4と絶縁体5との密着力(密着力2)は37N/35mmであった。そして、これらの密着力の比(密着力2/密着力1)は、0.61となった。また、内部シース2及び外部シース3を同時に除去して絶縁電線1を露出させた際の絶縁体5の伸び寸法は、0mm~0.3mmであった。
実施例2では、絶縁電線1とシース6との密着力(密着力1)は63N/35mmであった。また、導体4と絶縁体5との密着力(密着力2)は37N/35mmであった。そして、これらの密着力の比(密着力2/密着力1)は、0.59となった。また、内部シース2及び外部シース3を同時に除去して絶縁電線1を露出させた際の絶縁体5の伸び寸法は、0.3mm~0.5mmであった。
実施例3では、絶縁電線1とシース6との密着力(密着力1)は61N/35mmであった。また、導体4と絶縁体5との密着力(密着力2)は41N/35mmであった。そして、これらの密着力の比(密着力2/密着力1)は、0.67となった。また、内部シース2及び外部シース3を同時に除去して絶縁電線1を露出させた際の絶縁体5の伸び寸法は、0mm~0.2mmであった。
実施例4では、絶縁電線1とシース6との密着力(密着力1)は53N/35mmであった。また、導体4と絶縁体5との密着力(密着力2)は32N/35mmであった。そして、これらの密着力の比(密着力2/密着力1)は、0.60となった。また、内部シース2及び外部シース3を同時に除去して絶縁電線1を露出させた際の絶縁体5の伸び寸法は、0mm~0.3mmであった。
このように、実施例1~4では、何れも導体4と絶縁体5との密着力が高い値(32N/35mm以上の高い値)となり、密着力比が0.59以上となった。
そして、これらの実施例1~4では、内部シース2及び外部シース3を同時に除去して絶縁電線1を露出させた際の絶縁体5の伸び寸法が1mm以下であり、全て合格(○)となった。
比較例1では、絶縁電線1とシース6との密着力(密着力1)は60N/35mmであった。また、導体4と絶縁体5との密着力(密着力2)は20N/35mmであった。そして、これらの密着力の比(密着力2/密着力1)は、0.33となった。また、内部シース2及び外部シース3を同時に除去して絶縁電線1を露出させた際の絶縁体5の伸び寸法は、1.0mm~1.2mmであった。
比較例2では、絶縁電線1とシース6との密着力(密着力1)は58N/35mmであった。また、導体4と絶縁体5との密着力(密着力2)は19N/35mmであった。そして、これらの密着力の比(密着力2/密着力1)は、0.33となった。また、内部シース2及び外部シース3を同時に除去して絶縁電線1を露出させた際の絶縁体5の伸び寸法は、1.0mm~1.5mmであった。
比較例3では、絶縁電線1とシース6との密着力(密着力1)は53N/35mmであった。また、導体4と絶縁体5との密着力(密着力2)は17N/35mmであった。そして、これらの密着力の比(密着力2/密着力1)は、0.32となった。また、内部シース2及び外部シース3を同時に除去して絶縁電線1を露出させた際の絶縁体5の伸び寸法は、1.5mm~2.0mmであった。
このように、比較例1~3では、何れも導体4と絶縁体5との密着力が低い値(32N/35mmより低い値)となり、密着力比が0.59よりも低くなった。
そして、これらの比較例1~3では、内部シース2及び外部シース3を同時に除去して絶縁電線1を露出させた際の絶縁体5の伸び寸法が1mmを超えてしまい、全て不合格(×)となった。
本出願は、2012年1月19日出願の日本特許出願・出願番号2012-009373に基づくものであり、その内容はここに参照として取り込まれる。
Claims (3)
- 導体を絶縁体で覆った一対の絶縁電線を互いに撚り合わせ、これらの絶縁電線の周囲を内部シース及び外部シースからなるシースで覆ったケーブルであって、
前記導体は、複数本の素線を互いに撚り合わせた撚線を複数本集合させてさらに互いに撚り合わせてなることを特徴とするケーブル。 - 請求項1に記載のケーブルであって、
前記導体と前記絶縁体との密着力が、32N/35mm以上であることを特徴とするケーブル。 - 請求項1または2に記載のケーブルであって、
前記絶縁電線と前記シースとの密着力に対する前記導体と前記絶縁体との密着力の比が、0.59以上であることを特徴とするケーブル。
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