JP6838679B2 - cable - Google Patents

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JP6838679B2
JP6838679B2 JP2020152086A JP2020152086A JP6838679B2 JP 6838679 B2 JP6838679 B2 JP 6838679B2 JP 2020152086 A JP2020152086 A JP 2020152086A JP 2020152086 A JP2020152086 A JP 2020152086A JP 6838679 B2 JP6838679 B2 JP 6838679B2
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wires
insulated
interposition
cable
wire
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JP2021027050A (en
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得天 黄
得天 黄
佳典 塚本
佳典 塚本
真至 森山
真至 森山
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Hitachi Metals Ltd
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Description

本発明は、ケーブルに関する。 The present invention relates to a cable.

ロボット等の可動部に使用される可動部用ケーブルとして、複数本の絶縁電線をシースで覆ったものがある(例えば、特許文献1参照)。特許文献1では、同じ外径(同じ寸法仕様)のコア同士が互いに接触する状態で撚り合わせられた構造の可動部用ケーブルが開示されている。 As a cable for a moving part used for a moving part of a robot or the like, there is a cable in which a plurality of insulated electric wires are covered with a sheath (see, for example, Patent Document 1). Patent Document 1 discloses a cable for a moving part having a structure in which cores having the same outer diameter (same dimensional specification) are twisted together in a state of being in contact with each other.

特許第5307981号公報Japanese Patent No. 5307981

可動部用ケーブルでは、繰り返し屈曲や捻回が付与されるために、屈曲や捻回に対する耐性が高いこと、すなわち、屈曲や捻回を繰り返し付与しても絶縁電線が断線しにくいことが望まれる。 Since the cable for moving parts is repeatedly bent and twisted, it is desired that the cable has high resistance to bending and twisting, that is, the insulated wire is not easily broken even if bending and twisting are repeatedly applied. ..

そこで、本発明は、屈曲や捻回に対する耐性が高い可動部用ケーブルを提供することを目的とする。 Therefore, an object of the present invention is to provide a cable for a moving part having high resistance to bending and twisting.

本発明は、上記課題を解決することを目的として、複数本の線状体で構成される介在と、前記介在と接するように設けられた複数本の絶縁電線と、前記複数本の絶縁電線の周囲に設けられた押さえ巻きテープと、前記押さえ巻きテープの周囲に設けられたシースと、を備え、前記複数本の絶縁電線の少なくとも一部は、周方向に隣り合う前記絶縁電線同士の間に前記介在が入り込んでいることによって前記絶縁電線同士が互いに離間するように撚り合わせられており、周方向に隣り合う前記絶縁電線同士と、前記隣り合う前記絶縁電線同士の間に存在する前記介在の外面と、前記絶縁電線同士の周囲に接触して設けられた前記押さえ巻きテープとで囲まれる部分が、前記介在が充填されていない空隙部である、ケーブルを提供する。 An object of the present invention is to solve the above-mentioned problems, that is, an interposition composed of a plurality of linear bodies, a plurality of insulated electric wires provided so as to be in contact with the interposition, and the plurality of insulated electric wires. A presser winding tape provided around the tape and a sheath provided around the presser winding tape are provided, and at least a part of the plurality of insulated wires is between the insulated wires adjacent to each other in the circumferential direction. Due to the inclusion of the interposition, the insulated wires are twisted so as to be separated from each other, and the interposition existing between the insulated wires adjacent to each other in the circumferential direction and the adjacent insulated wires. an outer surface, the portion surrounded by the presser winding tape provided in contact with the periphery of each other said insulated wire, wherein the intermediate is a gap portion not filled, provides cable.

本発明によれば、屈曲や捻回に対する耐性が高い可動部用ケーブルを提供できる。 According to the present invention, it is possible to provide a cable for a moving part having high resistance to bending and twisting.

本発明の一実施の形態に係る可動部用ケーブルの長手方向に垂直な断面を示す断面図である。It is sectional drawing which shows the cross section perpendicular to the longitudinal direction of the cable for a movable part which concerns on one Embodiment of this invention. (a),(b)は、絶縁電線同士の接触について説明するための説明図である。(A) and (b) are explanatory views for explaining contact between insulated electric wires. 本発明の一変形例に係る可動部用ケーブルの長手方向に垂直な断面を示す断面図である。It is sectional drawing which shows the cross section perpendicular to the longitudinal direction of the cable for a movable part which concerns on one modification of this invention. 屈曲試験を説明する図である。It is a figure explaining the bending test.

[実施の形態]
以下、本発明の実施の形態を添付図面にしたがって説明する。
[Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

図1は、本実施の形態に係る可動部用ケーブルの長手方向に垂直な断面を示す断面図である。可動部用ケーブル1は、例えば、ロボットアーム等の産業用ロボットの可動部用の配線として用いられるものである。 FIG. 1 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction of the movable part cable according to the present embodiment. The movable part cable 1 is used, for example, as wiring for a movable part of an industrial robot such as a robot arm.

図1に示すように、可動部用ケーブル1は、中心介在2と、中心介在2の周囲に設けられた複数本の絶縁電線3と、複数本の絶縁電線3の周囲に設けられたシース5と、を備えている。 As shown in FIG. 1, the movable portion cable 1 includes a central interposition 2, a plurality of insulated wires 3 provided around the central interposition 2, and a sheath 5 provided around the plurality of insulated wires 3. And have.

可動部用の配線として用いられる可動部用ケーブル1では、屈曲や捻回に対する耐性(以下、単に耐屈曲性という)に優れることが要求される。従来、絶縁電線3の絶縁体32として耐摩耗性に優れたフッ樹脂を用いたり、絶縁電線3の導体31として非常に細い(例えば外径が0.08mm以下の)素線を用いた撚線導体を用いたりして、耐屈曲性の向上を図っていた。しかし、フッ素樹脂は高価であり、導体31に非常に細い素線を用いることもコストアップに繋がっていた。すなわち、可動部用ケーブルでは、従来よりも安価なものとすることも望まれる。 The movable portion cable 1 used as wiring for the movable portion is required to have excellent resistance to bending and twisting (hereinafter, simply referred to as bending resistance). Conventionally, a fluff resin having excellent wear resistance is used as the insulator 32 of the insulated wire 3, or a stranded wire using a very thin wire (for example, an outer diameter of 0.08 mm or less) is used as the conductor 31 of the insulated wire 3. Bending resistance was improved by using conductors. However, fluororesin is expensive, and using a very thin wire for the conductor 31 has also led to an increase in cost. That is, it is also desired that the cable for moving parts be cheaper than the conventional one.

より安価な可動部用ケーブルとするためには、従来よりも安価な材料からなる絶縁電線を使用することが考えられる。例えば、絶縁電線を構成する導体に従来の素線(例えば、0.08mmの外径)よりも外径の大きい素線(例えば、0.12mmの外径の素線)を適用して素線の本数を半分程度に減らすことにより、これまでと断面積が同じで材料コストや製造コストを低減した導体にすることが考えられる。また、絶縁電線を構成する絶縁体に、フッ素樹脂や熱可塑性ポリエステルエラストマーなどを主成分とする樹脂組成物よりも安価で汎用性の高い樹脂組成物(例えば、ポリプロピレン樹脂を主成分とする樹脂組成物など)を適用することが考えられる。 In order to obtain a cheaper cable for moving parts, it is conceivable to use an insulated wire made of a material that is cheaper than before. For example, a wire having a larger outer diameter than a conventional wire (for example, an outer diameter of 0.08 mm) (for example, a wire having an outer diameter of 0.12 mm) is applied to a conductor constituting an insulated wire. By reducing the number of conductors to about half, it is conceivable to make a conductor with the same cross-sectional area as before and reduced material cost and manufacturing cost. Further, the insulator constituting the insulated electric wire is a resin composition (for example, a resin composition containing polypropylene resin as a main component), which is cheaper and more versatile than a resin composition containing a fluororesin or a thermoplastic polyester elastomer as a main component. (Things, etc.) can be applied.

しかしながら、本発明者らの検討によれば、従来よりも外径の大きい素線を適用して素線の本数を減らした場合では、外径の小さい素線を適用して素線の本数が多い場合に比べて、繰り返し屈曲や捻回に対する耐性が低下してしまうことがある。また、絶縁体にフッ素樹脂や熱可塑性ポリエステルエラストマーなどを主成分とする樹脂組成物よりも安価で汎用性の高い樹脂を適用した場合では、絶縁体が摩耗しやすくなるため、繰り返し屈曲や捻回に対する耐性が低下してしまうことがある。 However, according to the study by the present inventors, when the number of strands is reduced by applying the strands having a larger outer diameter than before, the number of strands is increased by applying the strands having a smaller outer diameter. The resistance to repeated bending and twisting may be lower than in many cases. In addition, when a resin that is cheaper and more versatile than a resin composition containing a fluororesin or a thermoplastic polyester elastomer as a main component is applied to the insulator, the insulator is easily worn, so that the insulator is repeatedly bent or twisted. May reduce resistance to.

そこで、本発明者らは、従来よりも安価な材料を用いた絶縁電線に対して繰り返し屈曲や捻回が与えられた際に絶縁電線3が断線するメカニズムについて改めて検討を行った。その結果、屈曲や捻回による絶縁電線3同士の擦れが、絶縁電線3の断線に非常に大きな影響を与えていることを見出した。さらに検討を進めたところ、絶縁電線3同士を離間させて屈曲時等に互いに擦れないように絶縁電線3同士の間に介在を配置しておけば、比較的耐摩耗性の低いポリプロピレン等の樹脂を絶縁体32に用いたり、あるいは比較的太い(例えば外径が0.12mm以上)の素線を導体31に用いたりしても、従来と同等の良好な耐屈曲性を実現できることを見出し、本発明に至った。 Therefore, the present inventors have reexamined the mechanism by which the insulated wire 3 is disconnected when the insulated wire using a material cheaper than the conventional one is repeatedly bent or twisted. As a result, it was found that the rubbing between the insulated wires 3 due to bending or twisting has a great influence on the disconnection of the insulated wires 3. As a result of further studies, if the insulated wires 3 are separated from each other and an interposition is arranged between the insulated wires 3 so as not to rub against each other at the time of bending or the like, a resin such as polypropylene having relatively low wear resistance is provided. Was used for the insulator 32, or even if a relatively thick wire (for example, an outer diameter of 0.12 mm or more) was used for the conductor 31, it was found that the same good bending resistance as the conventional one could be realized. The present invention has been reached.

すなわち、本実施の形態に係る可動部用ケーブル1は、シース5内において複数本の絶縁電線3が、介在によって互いに離間するように撚り合わせられているものである。これにより、絶縁電線3の絶縁体32にフッ素樹脂等の高価な樹脂を用いたり、導体31に非常に細い素線を用いたりすることなく、低コストに耐屈曲性が高い可動部用ケーブル1を実現することが可能になる。以下、可動部用ケーブル1の各部の詳細について説明する。なお、隣り合う絶縁電線3同士が介在によって互いに離間していることや離間する距離については、例えば、光学顕微鏡あるいは電子顕微鏡を用いて観察することができる。 That is, in the movable part cable 1 according to the present embodiment, a plurality of insulated electric wires 3 are twisted in the sheath 5 so as to be separated from each other by interposition. As a result, the cable 1 for moving parts, which has high bending resistance at low cost, does not use an expensive resin such as fluororesin for the insulator 32 of the insulated wire 3 or a very thin wire for the conductor 31. Will be possible. Hereinafter, details of each part of the movable part cable 1 will be described. It should be noted that the fact that the adjacent insulated wires 3 are separated from each other by the interposition and the distance between them can be observed by using, for example, an optical microscope or an electron microscope.

(中心介在2)
中心介在2は、屈曲時に応力が集中するケーブル中心に配置されている。例えば、ケーブル中心に絶縁電線3を配置すると、当該絶縁電線3に応力が集中して断線等の不具合が生じやすくなるおそれがある。また、中心介在2は、絶縁電線3を撚り合わせる際の心材としての役割を果たしている。中心介在2の充填量を増やすことで、中心介在2全体の外径を大きくし、絶縁電線3同士を離間させることができる。つまり、本実施の形態では、中心介在2の充填量を十分に多くすることで、その周囲に配置される絶縁電線3を互いに離間させている。
(Central intervention 2)
The central interposition 2 is arranged at the center of the cable where stress is concentrated during bending. For example, if the insulated wire 3 is arranged at the center of the cable, stress may be concentrated on the insulated wire 3 and problems such as disconnection may easily occur. Further, the central interposition 2 plays a role as a core material when twisting the insulated electric wires 3. By increasing the filling amount of the central interposition 2, the outer diameter of the entire central interposition 2 can be increased, and the insulated wires 3 can be separated from each other. That is, in the present embodiment, the insulating electric wires 3 arranged around the central interposition 2 are separated from each other by sufficiently increasing the filling amount of the central interposition 2.

中心介在2は、中心介在2と絶縁電線3とが接触する部分において絶縁体32の外面が摩耗しにくくできるもので構成されているとよい。また、中心介在2は、絶縁電線3の外径よりも小さい複数本の線状体で構成されているとよい。なお、中心介在2は、複数本の絶縁電線3と同じ撚り方向で複数本の線状体が撚り合わせられていてもよい。さらに、中心介在2は、繰り返し曲げを行ったときに、絶縁電線3が周方向に動くことができ、かつ、絶縁電線3同士が接触しにくくすることができるような弾性をもつものが好ましい。さらにまた、中心介在2は、可動部用ケーブル1を繰り返し曲げたときに絶縁電線3に加わる応力を吸収するようなクッション性をもつものが好ましい。なお、複数本の線状体は、隣り合う絶縁電線3同士が離間する部分に入り込みやすく、上述した弾性やクッション性を得られやすくするために、絶縁電線3同士が離間する部分の大きさ(隣り合う一方の絶縁電線3の外面から他方の絶縁電線3の外面までの直線距離の最小値)よりも小さい外径であるとよい。中心介在2を構成する複数本の線状体としては、例えば、スフ糸(ステープルファイバー糸)等の繊維で構成される糸状体を用いることができる。なお、中心介在2に用いる線状体は、スフ糸等の繊維で構成される糸状体に限らず、例えば、樹脂等を押出して構成される紐や和紙等の紙、不織布等で構成されるものも用いることができる。また、中心介在2として線状体に限らず、例えば帯状のものを用いることもできる。中心介在2は、これらの線状体の中でも糸状体を用いた場合に、上述した弾性やクッション性がより得られやすい。 The central interposition 2 may be configured such that the outer surface of the insulator 32 is less likely to be worn at the portion where the central interposition 2 and the insulating electric wire 3 come into contact with each other. Further, the central interposition 2 may be composed of a plurality of linear bodies smaller than the outer diameter of the insulated wire 3. In the central interposition 2, a plurality of linear bodies may be twisted in the same twisting direction as the plurality of insulated wires 3. Further, it is preferable that the central interposition 2 has elasticity so that the insulated electric wires 3 can move in the circumferential direction and the insulated electric wires 3 can hardly come into contact with each other when repeatedly bent. Furthermore, the central interposition 2 preferably has a cushioning property that absorbs the stress applied to the insulated wire 3 when the movable cable 1 is repeatedly bent. It should be noted that the plurality of linear bodies can easily enter the portion where the adjacent insulated wires 3 are separated from each other, and in order to easily obtain the elasticity and cushioning property described above, the size of the portion where the insulated wires 3 are separated from each other ( The outer diameter may be smaller than the minimum value of the linear distance from the outer surface of one of the adjacent insulated wires 3 to the outer surface of the other insulated wire 3. As the plurality of linear bodies constituting the central interposition 2, for example, a filamentous body composed of fibers such as rayon (staple fiber thread) can be used. The linear body used for the central interposition 2 is not limited to a thread-like body composed of fibers such as rayon, and is composed of, for example, a string formed by extruding a resin or the like, paper such as Japanese paper, or a non-woven fabric. Can also be used. Further, the central interposition 2 is not limited to a linear body, and for example, a band-shaped body can be used. Among these linear bodies, the central interposition 2 is more likely to obtain the above-mentioned elasticity and cushioning property when a filamentous body is used.

(絶縁電線3)
絶縁電線3は、導体31と、導体31の周囲を覆う絶縁体32と、を有している。本実施の形態では、複数本の絶縁電線3は、外径の異なる複数種類の絶縁電線を含んでいる。図2では、電源供給用の電源線33を8本有すると共に、電源線33よりも外径が小さい信号伝送用の信号線34を2本有しており、合計10本の絶縁電線3を有している。ただし、絶縁電線3の本数はこれに限定されるものではない。また、外径の異なる3種類以上の絶縁電線3を有していてもよい。また、全ての絶縁電線3が同じ外径であってもよい。
(Insulated wire 3)
The insulated wire 3 has a conductor 31 and an insulator 32 that covers the periphery of the conductor 31. In the present embodiment, the plurality of insulated wires 3 include a plurality of types of insulated wires having different outer diameters. In FIG. 2, it has eight power supply lines 33 for power supply and two signal lines 34 for signal transmission having an outer diameter smaller than that of the power supply line 33, and has a total of ten insulated wires 3. doing. However, the number of insulated wires 3 is not limited to this. Further, it may have three or more types of insulated wires 3 having different outer diameters. Further, all the insulated wires 3 may have the same outer diameter.

長手方向に垂直な断面(横断面)において、2本の信号線34は、中心介在2を挟んで径方向に対向するように配置されており、周方向における2本の信号線34の間に、それぞれ4本ずつの電源線33が配置されている。これら10本の絶縁電線3は、中心介在2の外周に沿って中心介在2に接触しながら並ぶように配置されており、周方向に隣り合う絶縁電線3同士の間に中心介在2が入り込んでいることによって隣り合う絶縁電線3同士が互いに離間するように設けられている。つまり、電源線33と信号線34とは中心介在2によって周方向に離間され互いに接触しないようにされ、また、電源線33同士も周方向に離間され互いに接触しないようにされる。各絶縁電線3を離間させる距離(隣り合う一方の絶縁電線3の外面から他方の絶縁電線3の外面までの直線距離の最小値)については、使用時(可動部用ケーブル1に屈曲あるいは捻回が加えられたとき)に絶縁電線3同士が接触しない程度の距離とすればよく、0.1mm以上0.3mm以下とすればよい。なお、絶縁電線3を離間させる距離は、介在の充填量によって適宜調整することができる。 In a cross section perpendicular to the longitudinal direction (cross section), the two signal lines 34 are arranged so as to face each other in the radial direction with the central interposition 2 interposed therebetween, and are located between the two signal lines 34 in the circumferential direction. , Four power lines 33 are arranged for each. These 10 insulated wires 3 are arranged so as to be lined up along the outer periphery of the central interposition 2 while contacting the central interposition 2, and the central interposition 2 is inserted between the insulated wires 3 adjacent to each other in the circumferential direction. The insulated wires 3 that are adjacent to each other are provided so as to be separated from each other. That is, the power supply line 33 and the signal line 34 are separated from each other in the circumferential direction by the central interposition 2 so as not to come into contact with each other, and the power supply lines 33 are also separated from each other in the circumferential direction to prevent contact with each other. Regarding the distance that separates each insulated wire 3 (the minimum value of the linear distance from the outer surface of one of the adjacent insulated wires 3 to the outer surface of the other insulated wire 3) during use (bending or twisting the cable 1 for moving parts). The distance may be set so that the insulated wires 3 do not come into contact with each other (when is added), and may be 0.1 mm or more and 0.3 mm or less. The distance for separating the insulated wires 3 can be appropriately adjusted depending on the filling amount of the intervening wires.

周方向に隣り合う絶縁電線3同士と当該絶縁電線3同士の周囲に接触して設けられた部材(例えば、押さえ巻テープ4あるいは押さえ巻テープ4が設けられていない場合はシース5)との間は、中心介在2が充填されていない空隙部7となっている。空隙部7を有することにより、周方向に隣り合う絶縁電線3同士が離間する程度に中心介在2の充填量を多くしても、絶縁電線3が動きやすくなり、可動部用ケーブル1も硬くなりにくいため、可動部用ケーブル1を繰り返し屈曲や捻回した際に、絶縁電線3に負荷がかかりにくくなる。その結果、絶縁電線3が断線しにくくなる。 Between the insulated wires 3 adjacent to each other in the circumferential direction and the members provided in contact with each other around the insulated wires 3 (for example, the presser winding tape 4 or the sheath 5 when the presser winding tape 4 is not provided). Is a void portion 7 in which the central interposition 2 is not filled. By having the gap portion 7, even if the filling amount of the central interposition 2 is increased to such an extent that the insulated electric wires 3 adjacent to each other in the circumferential direction are separated from each other, the insulated electric wire 3 becomes easy to move and the cable 1 for the movable portion also becomes hard. Since it is difficult, when the movable part cable 1 is repeatedly bent or twisted, the load is less likely to be applied to the insulated wire 3. As a result, the insulated wire 3 is less likely to break.

ケーブル中心C1から絶縁電線3の介在(中心介在2)と接する外面までの最少距離を距離L1とし、ケーブル中心C1から絶縁電線3の中心C2までの距離を距離L2とし、ケーブル中心C1から絶縁電線3同士の間に存在する介在(中心介在2)の外面までの距離を距離L3とする。可動部用ケーブル1では、距離L3は、距離L1よりも大きく、かつ、距離L2と同じかそれよりも小さい。ここで、距離L2は、距離L1に絶縁電線3の半径rを加えた値と等しいことから、距離L3は、以下の関係を満たすように絶縁電線3同士の間に入り込んでいることがよい。
(距離L1)<(距離L3)≦(距離L1+r)
The minimum distance from the cable center C1 to the outer surface in contact with the interposition of the insulated wire 3 (center interposition 2) is defined as the distance L1, the distance from the cable center C1 to the center C2 of the insulated wire 3 is defined as the distance L2, and the distance from the cable center C1 to the insulated wire. The distance to the outer surface of the interposition (center interposition 2) existing between the three is defined as the distance L3. In the movable part cable 1, the distance L3 is larger than the distance L1 and equal to or smaller than the distance L2. Here, since the distance L2 is equal to the value obtained by adding the radius r of the insulated wire 3 to the distance L1, the distance L3 may be inserted between the insulated wires 3 so as to satisfy the following relationship.
(Distance L1) <(Distance L3) ≤ (Distance L1 + r)

さらに、絶縁電線3同士が接触して擦れてしまうことを防止しやすくすることと、可動部用ケーブル1を曲げたときの可動部用ケーブル1の曲げ易さを効率よく得る観点からは、距離L3は、以下の関係を満たすことがより好ましい。
(距離L1+r/3)<(距離L3)<(距離L1+r)
Further, from the viewpoint of making it easy to prevent the insulated wires 3 from coming into contact with each other and rubbing against each other and efficiently obtaining the bendability of the movable part cable 1 when the movable part cable 1 is bent, the distance It is more preferable that L3 satisfies the following relationship.
(Distance L1 + r / 3) <(Distance L3) <(Distance L1 + r)

なお、全ての絶縁電線3が互いに離間されていることが好ましいが、図2(a)において破線で囲った部分に示されるように、絶縁電線3同士が周方向において接触している部分があってもよい。より具体的には、任意の絶縁電線3において、周方向に隣り合う両側の2つの絶縁電線3のうち、少なくとも一方の絶縁電線3が、中心介在2によって離間されている構成であればよい。可動部用ケーブル1を繰り返し曲げた際に、絶縁電線3同士が接触していない方向に移動することができるため、絶縁電線3同士が擦れにくくなり、絶縁電線3が断線しにくくなるためである。図2(b)において破線で囲った部分に示されるように、任意の絶縁電線3が、周方向に隣り合う2つの絶縁電線3で挟まれるように接触している場合、可動部用ケーブル1を繰り返し曲げた際に、絶縁電線3同士が常に接触している状態になるため、絶縁電線3同士が擦れて断線し易くなる。また、介在は、少なくとも、可動部用ケーブル1の長手方向の繰り返し屈曲や捻回が行われる部分の横断面において、図1〜2、あるいは後述する図3に示すように配置されていることがよい。すなわち、周方向に隣り合う両側の2つの絶縁電線3のうち、少なくとも一方の絶縁電線3が離間するように、介在が隣り合う絶縁電線3同士の間に配置されている横断面が、少なくとも、可動部用ケーブル1の繰り返し屈曲や捻回が行われる部分に、長手方向に沿って連続して存在するとよい。より好ましくは、上述した横断面が可動部用ケーブル1の長手方向の全長にわたって連続して存在することがよい。 It is preferable that all the insulated wires 3 are separated from each other, but as shown by the portion surrounded by the broken line in FIG. 2A, there is a portion where the insulated wires 3 are in contact with each other in the circumferential direction. You may. More specifically, in any insulated wire 3, at least one of the two insulated wires 3 on both sides adjacent to each other in the circumferential direction may be separated by the central interposition 2. This is because when the moving cable 1 is repeatedly bent, the insulated wires 3 can move in a direction in which they are not in contact with each other, so that the insulated wires 3 are less likely to rub against each other and the insulated wires 3 are less likely to break. .. As shown in the portion surrounded by the broken line in FIG. 2B, when any insulated wire 3 is in contact with each other so as to be sandwiched between two insulated wires 3 adjacent to each other in the circumferential direction, the cable 1 for the movable part 1 When the above is repeatedly bent, the insulated wires 3 are always in contact with each other, so that the insulated wires 3 are liable to rub against each other and break easily. Further, at least, the interposition is arranged as shown in FIGS. 1 and 2 or FIG. 3, which will be described later, in the cross section of the portion where the movable portion cable 1 is repeatedly bent and twisted in the longitudinal direction. Good. That is, at least, the cross section of the two insulated wires 3 on both sides adjacent to each other in the circumferential direction is arranged between the insulated wires 3 having the interpositions adjacent to each other so that at least one of the insulated wires 3 is separated from each other. It is preferable that the movable portion cable 1 is continuously present along the longitudinal direction in the portion where the cable 1 is repeatedly bent or twisted. More preferably, the above-mentioned cross section may be continuously present over the entire length of the movable part cable 1 in the longitudinal direction.

導体31は、銅やアルミニウム等からなる複数本の素線を撚り合わせた撚線導体からなる。本実施の形態では、導体31に用いる素線として、外径が0.08mmよりも大きいもの、より具体的には外径が0.12mm以上0.26mm以下の素線を用いても、十分な耐屈曲性を実現することができる。なお、導体31に用いる素線として、外径が0.08mm以下(0.05mm以上0.08mm以下)のものを用いることで、耐屈曲性をさらに向上させることも可能である。本実施の形態では、外径が0.12mmの素線を用いた。なお、電源線33と信号線34に用いる素線の外径が異なっていてもよい。また、導体31の外径は、例えば、0.40mm以上3.00mm以下である。特に、導体31の外径を2.00mm以下とした場合は、耐屈曲性を向上させやすい。導体31の断面積は、例えば、0.09mm2以上5.50mm2以下である。素線は、例えば、すずめっき、亜鉛めっき、銀めっき等が外面に設けられた軟銅線等を用いることができる。 The conductor 31 is made of a stranded conductor obtained by twisting a plurality of strands made of copper, aluminum, or the like. In the present embodiment, as the wire used for the conductor 31, it is sufficient to use a wire having an outer diameter larger than 0.08 mm, more specifically, a wire having an outer diameter of 0.12 mm or more and 0.26 mm or less. Bending resistance can be realized. It is also possible to further improve the bending resistance by using a wire having an outer diameter of 0.08 mm or less (0.05 mm or more and 0.08 mm or less) as the wire used for the conductor 31. In this embodiment, a wire having an outer diameter of 0.12 mm is used. The outer diameters of the strands used for the power supply line 33 and the signal line 34 may be different. The outer diameter of the conductor 31 is, for example, 0.40 mm or more and 3.00 mm or less. In particular, when the outer diameter of the conductor 31 is 2.00 mm or less, the bending resistance can be easily improved. Sectional area of the conductor 31 is, for example, 0.09 mm 2 or more 5.50 mm 2 or less. As the strands, for example, annealed copper wires having tin plating, zinc plating, silver plating or the like provided on the outer surface can be used.

また、本実施の形態では、絶縁体32として、安価なポリプロピレンをベース(主成分)とする樹脂組成物からなるものを用いた。なお、絶縁体32としてフッ素樹脂や熱可塑性ポリエステルエラストマーなどをベースとする樹脂組成物からなるものを用いてもよい。ただし、フッ素樹脂や熱可塑性ポリエステルエラストマーなどをベースとする樹脂組成物よりも、ポリプロピレンをベースとする樹脂組成物の方が、安価な点で好ましい。絶縁体32の厚さは、例えば、0.15mm以上0.40mmである。 Further, in the present embodiment, as the insulator 32, one made of an inexpensive polypropylene-based resin composition (main component) is used. As the insulator 32, one made of a resin composition based on a fluororesin, a thermoplastic polyester elastomer, or the like may be used. However, a polypropylene-based resin composition is preferable to a resin composition based on a fluororesin, a thermoplastic polyester elastomer, or the like, because it is inexpensive. The thickness of the insulator 32 is, for example, 0.15 mm or more and 0.40 mm.

(押さえ巻きテープ4)
複数本の絶縁電線3の周囲には、押さえ巻きテープ4が巻き付けられている。押さえ巻きテープ4は、絶縁電線3の撚りがほどけないように押え込む役割を果たしている。押さえ巻きテープ4としては、例えば、紙テープ、不織布からなるテープ、あるいはPET(ポリエチレンテレフタレート)等からなる樹脂テープを用いることができる。複数本の絶縁電線3の周囲に螺旋状に巻き付けられている。押さえ巻きテープ4は、全ての絶縁電線3に接触しており、絶縁電線3と押さえ巻きテープ4との間に介在は配置されていない。
(Presser winding tape 4)
A presser winding tape 4 is wound around the plurality of insulated wires 3. The presser winding tape 4 plays a role of pressing the insulating electric wire 3 so as not to be untwisted. As the presser foot tape 4, for example, a paper tape, a tape made of a non-woven fabric, or a resin tape made of PET (polyethylene terephthalate) or the like can be used. It is spirally wound around a plurality of insulated wires 3. The presser foot tape 4 is in contact with all the insulated wires 3, and no interposition is arranged between the insulated wire 3 and the presser foot tape 4.

(シース5)
シース5は、押さえ巻きテープ4の周囲を覆うように設けられている。シース5としては、可動部用ケーブル1を外力から保護できるように、例えば、ポリ塩化ビニル、ポリエチレン、ポリプロピレンをベースとする樹脂組成物からなるもの用いることができる。なお、シース5と押さえ巻きテープ4との間に、ノイズ抑制用の外部導体を設けてもよい。外部導体としては、例えば、銅やアルミニウム等からなる金属素線を編組あるいは横巻きしたもの、又は銅やアルミニウム等からなる金属めっき層を用いることができる。
(Sheath 5)
The sheath 5 is provided so as to cover the periphery of the presser foot tape 4. As the sheath 5, for example, a sheath made of a resin composition based on polyvinyl chloride, polyethylene, or polypropylene can be used so that the cable 1 for moving parts can be protected from an external force. An outer conductor for suppressing noise may be provided between the sheath 5 and the presser foot tape 4. As the outer conductor, for example, a metal wire made of copper, aluminum, or the like braided or horizontally wound, or a metal plating layer made of copper, aluminum, or the like can be used.

(変形例)
図3に示す可動部用ケーブル1aは、径方向において2層に絶縁電線3を配置したものである。可動部用ケーブル1aでは、複数本の絶縁電線3は、中心介在2の周囲に撚り合わせられた複数本の内層用電線3aを有している。複数本の内層用電線3aは、中心介在2の充填量を十分に多くすることで、周方向に隣り合う内層用電線3a線同士が中心介在2によって互いに離間するように設けられている。
(Modification example)
In the movable part cable 1a shown in FIG. 3, the insulated electric wires 3 are arranged in two layers in the radial direction. In the movable portion cable 1a, the plurality of insulated electric wires 3 have a plurality of inner layer electric wires 3a twisted around the central interposition 2. The plurality of inner layer electric wires 3a are provided so that the inner layer electric wires 3a wires adjacent to each other in the circumferential direction are separated from each other by the central interposition 2 by sufficiently increasing the filling amount of the central interposition 2.

また、可動部用ケーブル1aは、内層用電線3aの周囲を覆うように設けられた中間介在6を備えている。中間介在6としては、中心介在2と同じものを用いるとよく、例えば、スフ糸(ステープルファイバー糸)等の糸状体を用いることができる。中間介在6は、図3に示すように、周方向に隣り合う内層用電線3a同士が中心介在2によって離間された部分に空隙がないよう充填されているとよい。このように中間介在6が充填されていることにより、可動部用ケーブル1aを繰り返して屈曲や捻回させたときに、内層用電線3a同士が互いに擦れにくくなるため、内層用電線3aを断線しにくくすることができる。 Further, the movable portion cable 1a includes an intermediate interposition 6 provided so as to cover the periphery of the inner layer electric wire 3a. As the intermediate interposition 6, the same one as that of the central interposition 2 may be used, and for example, a filamentous body such as rayon (staple fiber yarn) can be used. As shown in FIG. 3, the intermediate interposition 6 is preferably filled so that there is no gap in a portion where the inner layer electric wires 3a adjacent to each other in the circumferential direction are separated from each other by the central interposition 2. Since the intermediate interposition 6 is filled in this way, when the movable part cable 1a is repeatedly bent or twisted, the inner layer electric wires 3a are less likely to rub against each other, so that the inner layer electric wire 3a is disconnected. It can be made difficult.

さらに、可動部用ケーブル1aでは、複数本の絶縁電線3は、中間介在6の周囲に中間介在6に接するように撚り合わせられた複数本の外層用電線3bを有している。複数本の外層用電線3bは、中間介在6の充填量を十分に多くすることで、周方向に隣り合う外層用電線3b同士が中間介在6によって互いに離間するように設けられている。また、内層用電線3aと外層用電線3bとの間は、中間介在6が充填されていることにより離間されている。このとき、中間介在6は、内層用電線3aと外層用電線3bとの間に空隙がないよう充填されていることがよい。これにより、シース5内に含まれる全ての絶縁電線3が互いに離間した状態で配置されることになり、屈曲や捻回を加えた際の絶縁電線3同士の擦れが抑制され、屈曲や捻回により絶縁電線3が断線しにくくなる。なお、周方向に隣り合う外層用電線同士3bが離間する距離は、周方向に隣り合う内層用電線3a同士が離間する距離よりも大きいことがよい。このような構成とすることにより、可動部用ケーブル1aを繰り返して屈曲や捻回させたときに、外層用電線3bが空隙部7に起因して周方向に移動したとしても、外層用電線3b同士の接触を防止して外層用電線3b同士を擦れにくくすることができる。そのため、外層用電線3bを断線しにくくすることができる。 Further, in the movable portion cable 1a, the plurality of insulated electric wires 3 have a plurality of outer layer electric wires 3b twisted around the intermediate interposition 6 so as to be in contact with the intermediate interposition 6. The plurality of outer layer electric wires 3b are provided so that the outer layer electric wires 3b adjacent to each other in the circumferential direction are separated from each other by the intermediate interposition 6 by sufficiently increasing the filling amount of the intermediate interposition 6. Further, the inner layer electric wire 3a and the outer layer electric wire 3b are separated by filling the intermediate interposition 6. At this time, the intermediate interposition 6 may be filled so that there is no gap between the inner layer electric wire 3a and the outer layer electric wire 3b. As a result, all the insulated wires 3 contained in the sheath 5 are arranged in a state of being separated from each other, and rubbing between the insulated wires 3 when bending or twisting is suppressed, and bending or twisting is suppressed. This makes it difficult for the insulated wire 3 to break. The distance between the outer layer electric wires 3b adjacent to each other in the circumferential direction may be larger than the distance between the inner layer electric wires 3a adjacent to each other in the circumferential direction. With such a configuration, when the movable part cable 1a is repeatedly bent or twisted, even if the outer layer electric wire 3b moves in the circumferential direction due to the gap portion 7, the outer layer electric wire 3b It is possible to prevent contact between the outer layer electric wires 3b and prevent the outer layer electric wires 3b from rubbing against each other. Therefore, it is possible to prevent the outer layer electric wire 3b from being broken.

可動部用ケーブル1aでは、絶縁電線3として、12本の電源線33と、6本の信号線34を用いている。また、可動部用ケーブル1aでは、内層用電線3aの全てが信号線34で構成され、外層用電線3bの全てが電源線33で構成されている。つまり、可動部用ケーブル1aでは、内層用電線3aが、外層用電線3bよりも外径が小さい。可動部用ケーブル1aの外側では、径方向外側に配置される絶縁電線3ほど曲げにより引き伸ばされる力が大きくなる。よって、より外径が小さく断線しやすい信号線34を径方向内側に配置することで、耐屈曲性をより向上できる。 In the moving part cable 1a, 12 power lines 33 and 6 signal lines 34 are used as the insulated wires 3. Further, in the movable part cable 1a, all of the inner layer electric wires 3a are composed of signal lines 34, and all of the outer layer electric wires 3b are composed of power supply lines 33. That is, in the movable part cable 1a, the inner layer electric wire 3a has a smaller outer diameter than the outer layer electric wire 3b. On the outside of the movable part cable 1a, the force stretched by bending increases as the insulated wire 3 is arranged on the outer side in the radial direction. Therefore, the bending resistance can be further improved by arranging the signal line 34 having a smaller outer diameter and easily breaking in the radial direction.

また、可動部用ケーブル1aでは、周方向に隣り合う外層用電線3bと押さえ巻テープ4(あるいは抑え巻テープ4が設けられていない場合はシース5)との間は、中間介在6が充填されていない空隙部7となっている。空隙部7を有することにより、周方向に隣り合う絶縁電線3同士が離間する程度に中心介在2や中間介在6の充填量を多くしても、絶縁電線3が動きやすくなり、可動部用ケーブル1aも硬くなりにくいため、可動部用ケーブル1を繰り返し屈曲や捻回した際に、絶縁電線3に負荷がかかりにくくなる。その結果、絶縁電線3が断線しにくくなる。 Further, in the movable part cable 1a, an intermediate interposition 6 is filled between the outer layer electric wires 3b adjacent to each other in the circumferential direction and the presser winding tape 4 (or the sheath 5 when the presser winding tape 4 is not provided). It is a gap portion 7 that is not open. By having the gap portion 7, the insulated wire 3 becomes easy to move even if the filling amount of the central interposition 2 and the intermediate interposition 6 is increased to the extent that the insulated wires 3 adjacent to each other in the circumferential direction are separated from each other, and the cable for the movable portion. Since 1a is also hard to be hardened, it is difficult for the insulated wire 3 to be loaded when the moving cable 1 is repeatedly bent or twisted. As a result, the insulated wire 3 is less likely to break.

図3では、絶縁電線3を2層に配置する場合を説明したが、これに限らず、3層以上としてもよい。また、内層用電線3aを構成する絶縁電線3や、外層用電線3bを構成する絶縁電線3が、同じ外径の絶縁電線3でなくともよく、内層用電線3aあるいは外層用電線3bが、外径の異なる複数種類の絶縁電線3で構成されてもよい。 In FIG. 3, the case where the insulated wires 3 are arranged in two layers has been described, but the present invention is not limited to this, and the number of layers may be three or more. Further, the insulated wire 3 constituting the inner layer electric wire 3a and the insulated wire 3 constituting the outer layer electric wire 3b do not have to be the insulated electric wire 3 having the same outer diameter, and the inner layer electric wire 3a or the outer layer electric wire 3b is the outer wire. It may be composed of a plurality of types of insulated wires 3 having different diameters.

また、可動部用ケーブル1aにおいても、内層用電線3a同士、あるいは外層用電線3b同士が周方向において接触している部分があってもよい。より具体的には、任意の絶縁電線3(内層用電線3aまたは外層用電線3b)において、周方向に隣り合う2つの絶縁電線3(内層用電線3aまたは外層用電線3b)のうち、少なくとも一方の絶縁電線3(内層用電線3aまたは外層用電線3b)が、中心介在2によって離間されている構成であればよい。 Further, in the movable part cable 1a, there may be a portion where the inner layer electric wires 3a or the outer layer electric wires 3b are in contact with each other in the circumferential direction. More specifically, in any insulated wire 3 (inner layer electric wire 3a or outer layer electric wire 3b), at least one of two insulated electric wires 3 (inner layer electric wire 3a or outer layer electric wire 3b) adjacent to each other in the circumferential direction. Insulated electric wire 3 (inner layer electric wire 3a or outer layer electric wire 3b) may be separated by a central interposition 2.

(屈曲試験)
図1の可動部用ケーブル1(実施例1)及び図3の可動部用ケーブル1a(実施例2)を試作し、屈曲試験を行った。電源線33の導体の断面積は1.8mm2、信号線34の導体の断面積は0.5mm2とし、導体31に用いる素線の外径は0.12mmとし、絶縁体32はポリプロピレンからなるものを用いた。シース5には、ポリ塩化ビニルをベースとする樹脂組成物からなるものを用いた。
(Bending test)
The movable part cable 1 (Example 1) of FIG. 1 and the movable part cable 1a (Example 2) of FIG. 3 were prototyped and subjected to a bending test. The cross-sectional area of the conductor of the power supply line 33 is 1.8 mm 2 , the cross-sectional area of the conductor of the signal line 34 is 0.5 mm 2 , the outer diameter of the wire used for the conductor 31 is 0.12 mm, and the insulator 32 is made of polypropylene. Was used. A sheath 5 made of a resin composition based on polyvinyl chloride was used.

屈曲試験では、図4に示すように、線心の移動が起こらないように可動部用ケーブル1,1aの上端部を固定し、可動部用ケーブル1,1aの下端部に荷重W=5N(500gf)の錘を吊り下げ、可動部用ケーブル1,1aの左右に湾曲させた形の曲げジグ11を取り付けた状態で、曲げジグ11に沿って左右方向に±90°の曲げを加えるように可動部用ケーブル1,1aを屈曲させた。屈曲の曲げ半径Rは、可動部用ケーブル1,1aの外径の約2倍とした。屈曲速度は30回/分とし、屈曲回数は左右方向への一往復を1回としてカウントした。また、可動部用ケーブル1,1aの屈曲を繰り返し、適宜回ごとに可動部用ケーブル1,1aの両端部間で導体31の導通検査を行い、初期からの減衰量あるいは特性インピーダンスの変化量が10%以上となった屈曲回数を屈曲寿命とした。屈曲試験では、屈曲寿命が30万回以上である場合を合格とし、屈曲寿命が30万回未満である場合を不合格とした。 In the bending test, as shown in FIG. 4, the upper end of the movable part cable 1, 1a is fixed so that the line center does not move, and the load W = 5N (load W = 5N) is applied to the lower end of the movable part cable 1, 1a. With the weight of 500gf) suspended and the bending jig 11 curved to the left and right of the moving cable 1, 1a attached, bend ± 90 ° in the left-right direction along the bending jig 11. Cables 1, 1a for moving parts were bent. The bending radius R of bending was set to be about twice the outer diameter of the cables 1, 1a for moving parts. The bending speed was 30 times / minute, and the number of times of bending was counted as one round trip in the left-right direction. Further, the movable part cables 1 and 1a are repeatedly bent, and the continuity of the conductor 31 is inspected between both ends of the movable part cables 1 and 1a at appropriate times, and the amount of attenuation or the amount of change in the characteristic impedance from the initial stage is determined. The bending life was defined as the number of bendings of 10% or more. In the bending test, a case where the bending life was 300,000 times or more was passed, and a case where the bending life was less than 300,000 times was rejected.

また、実施例1において中心介在2の充填量を減らして隣り合う絶縁電線3同士を接触させた比較例1の可動部用ケーブルを作製した。さらに、実施例2において、中心介在2の充填量を減らして隣り合う内層用電線3aを同士を接触させ、かつ中間介在6を省略して内層用電線3aと外層用電線3bとを接触させると共に、隣り合う外層用電線3b同士も接触させた比較例2の可動部用ケーブルを作製した。 Further, in Example 1, the filling amount of the central interposition 2 was reduced to produce the movable part cable of Comparative Example 1 in which the adjacent insulated electric wires 3 were brought into contact with each other. Further, in the second embodiment, the filling amount of the central interposition 2 is reduced to bring the adjacent inner layer electric wires 3a into contact with each other, and the intermediate interposition 6 is omitted to bring the inner layer electric wire 3a and the outer layer electric wire 3b into contact with each other. , The cable for the movable part of Comparative Example 2 in which the adjacent outer layer electric wires 3b were also brought into contact with each other was produced.

さらにまた、実施例1において、導体31に用いる素線の外径を0.08mmとし、かつ絶縁体32としてフッ素樹脂であるETFE(テトラフルオロエチレン・エチレン共重合体)を用いた実施例3の可動部用ケーブルを作製した。作製した比較例1,2及び実施例3の可動部用ケーブルについて、実施例1,2と同様に屈曲試験を行った。実施例1,2,3、及び比較例1,2の屈曲試験の結果を表1にまとめて示す。 Furthermore, in Example 1, the outer diameter of the wire used for the conductor 31 is 0.08 mm, and ETFE (tetrafluoroethylene / ethylene copolymer), which is a fluororesin, is used as the insulator 32 in Example 3. A cable for moving parts was manufactured. The movable cable of Comparative Examples 1 and 2 and Example 3 produced was subjected to a bending test in the same manner as in Examples 1 and 2. The results of the bending tests of Examples 1, 2 and 3 and Comparative Examples 1 and 2 are summarized in Table 1.

Figure 0006838679
Figure 0006838679

表1に示すように、比較例1,2では屈曲寿命が30万回未満(10万回程度)となり屈曲試験に不合格となった。これに対して、本発明の実施例1,2では、屈曲寿命が30万回以上(33万回程度)となり、屈曲試験に合格した。また、従来例についても、屈曲寿命が30万回以上(34万回程度)となり、屈曲試験に合格した。このように、本発明の実施例1,2によれば、導体31の素線の外径を0.12mmとし、絶縁体32としてフッ素樹脂や熱可塑性ポリエステルエラストマーなどを主成分とする樹脂組成物よりも比較的耐屈曲性の低い(摩耗しやすい)ポリプロピレンを用いているにもかかわらず、屈曲寿命が30万回以上となり、絶縁体32にフッ素樹脂を用いた実施例3と同等の耐屈曲性が得られることが確認できた。 As shown in Table 1, in Comparative Examples 1 and 2, the bending life was less than 300,000 times (about 100,000 times), and the bending test was unsuccessful. On the other hand, in Examples 1 and 2 of the present invention, the bending life was 300,000 times or more (about 330,000 times), and the bending test was passed. Further, also in the conventional example, the bending life was 300,000 times or more (about 340,000 times), and the bending test was passed. As described above, according to Examples 1 and 2 of the present invention, the outer diameter of the wire of the conductor 31 is 0.12 mm, and the resin composition containing fluororesin, thermoplastic polypropylene elastomer, or the like as the main component of the insulator 32. Despite the use of polypropylene, which has a relatively lower bending resistance (easily wears), the bending life is 300,000 times or more, and the bending resistance equivalent to that of Example 3 in which fluororesin is used for the insulator 32. It was confirmed that sex was obtained.

(実施の形態の作用及び効果)
以上説明したように、本実施の形態に係る可動部用ケーブル1では、少なくともケーブル中心に設けられた介在(中心介在2)と、介在(中心介在2)の周囲に介在(中心介在2)と接するように設けられた複数本の絶縁電線3と、複数本の絶縁電線3の周囲に設けられたシース5と、を備え、複数本の絶縁電線3は、周方向に隣り合う絶縁電線3同士の間に介在(中心介在2)が入り込んでいることによって絶縁電線3同士が互いに離間するように設けられている。
(Actions and effects of embodiments)
As described above, in the cable 1 for the movable part according to the present embodiment, at least the interposition provided at the center of the cable (center interposition 2) and the interposition around the intervening (center interposition 2) (center interposition 2) A plurality of insulated wires 3 provided so as to be in contact with each other and a sheath 5 provided around the plurality of insulated wires 3 are provided, and the plurality of insulated wires 3 are adjacent to each other in the circumferential direction. Insulated electric wires 3 are provided so as to be separated from each other by interposing an interposition (center interposition 2) between the two.

これにより、屈曲や捻回を加えた際の絶縁電線3同士の擦れが抑制され、屈曲や捻回により絶縁電線3が断線しにくくなる。その結果、絶縁体32として比較的耐摩耗性の低いポリプロピレン等の樹脂を用いたり、導体31に比較的外径の大きい素線を用いたりした場合であっても、十分な耐屈曲性を実現することが可能になる。すなわち、本実施の形態によれば、低コストでありつつも、屈曲や捻回に対する耐性が高い可動部用ケーブル1を実現できる。また、絶縁体32にフッ素樹脂をもちいたり、導体31に細径の素線を用いたりすることで、屈曲や捻回に対する耐性をさらに向上させることが可能である。 As a result, rubbing between the insulated wires 3 when bent or twisted is suppressed, and the insulated wires 3 are less likely to break due to bending or twisting. As a result, sufficient bending resistance is realized even when a resin such as polypropylene having a relatively low wear resistance is used as the insulator 32 or a wire having a relatively large outer diameter is used for the conductor 31. It becomes possible to do. That is, according to the present embodiment, it is possible to realize the cable 1 for a movable part, which has high resistance to bending and twisting while being low in cost. Further, by using a fluororesin for the insulator 32 and using a wire having a small diameter for the conductor 31, it is possible to further improve the resistance to bending and twisting.

(実施の形態のまとめ)
次に、以上説明した実施の形態から把握される技術思想について、実施の形態における符号等を援用して記載する。ただし、以下の記載における各符号等は、特許請求の範囲における構成要素を実施の形態に具体的に示した部材等に限定するものではない。
(Summary of embodiments)
Next, the technical idea grasped from the above-described embodiment will be described with reference to the reference numerals and the like in the embodiment. However, the respective symbols and the like in the following description are not limited to the members and the like in which the components in the claims are specifically shown in the embodiment.

[1]複数本の線状体で構成される介在と、前記介在と接するように設けられた複数本の絶縁電線(3)と、前記複数本の絶縁電線(3)の周囲に設けられた押さえ巻きテープ(4)と、前記押さえ巻きテープ(4)の周囲に設けられたシース(5)と、を備え、前記複数本の絶縁電線(3)の少なくとも一部は、周方向に隣り合う前記絶縁電線(3)同士の間に前記介在が入り込んでいることによって前記絶縁電線(3)同士が互いに離間するように撚り合わせられている、可動部用ケーブル(1)。 [1] An interposition composed of a plurality of linear bodies, a plurality of insulated wires (3) provided in contact with the interposition, and a plurality of insulated wires (3) provided around the plurality of insulated wires (3). A presser foot tape (4) and a sheath (5) provided around the presser foot tape (4) are provided, and at least a part of the plurality of insulated electric wires (3) are adjacent to each other in the circumferential direction. A movable part cable (1) in which the insulated wires (3) are twisted so as to be separated from each other by interposing the interposition between the insulated wires (3).

[2]周方向に隣り合う前記絶縁電線(3)同士と前記絶縁電線(3)同士の周囲に接触して設けられ前記押さえ巻きテープ(4)とで囲まれる部分には、前記介在が充填されていない空隙部(7)を有する、[1]に記載の可動部用ケーブル(1)。 [2] The portion surrounded by the insulating electric wires (3) adjacent to each other in the circumferential direction and the insulating electric wires (3) in contact with each other and surrounded by the presser winding tape (4) is filled with the interposition. The movable part cable (1) according to [1], which has a gap portion (7) that is not provided.

[3]前記複数本の絶縁電線(3)は、外径の異なる2種類の絶縁電線が周方向に沿って配置されている、[1]または[2]に記載の可動部用ケーブル(1)。 [3] The movable part cable (1) according to [1] or [2], wherein the plurality of insulated wires (3) have two types of insulated wires having different outer diameters arranged along the circumferential direction. ).

[4]前記複数本の絶縁電線(3)は、ケーブル中心に設けられた前記介在の周囲に撚り合わせられた複数本の内層用電線(3a)と、前記内層用電線(3a)の周囲に設けられた前記介在の周囲に撚り合わせられた複数本の外層用電線(3b)と、を有し、前記複数本の内層用電線(3a)と前記複数本の外層用電線(3b)との間が前記介在によって離間されており、かつ周方向に隣り合う前記内層用電線(3a)同士及び周方向に隣り合う前記外層用電線(3b)同士が前記介在によって互いに離間されている、[1]または[2]に記載の可動部用ケーブル(1a)。 [4] The plurality of insulated electric wires (3) are formed around the plurality of inner layer electric wires (3a) and the inner layer electric wires (3a) twisted around the interposition provided at the center of the cable. A plurality of outer layer electric wires (3b) twisted around the provided interposition, and the plurality of inner layer electric wires (3a) and the plurality of outer layer electric wires (3b) are provided. The intervals are separated by the interposition, and the inner layer electric wires (3a) adjacent to each other in the circumferential direction and the outer layer electric wires (3b) adjacent to each other in the circumferential direction are separated from each other by the interposition. ] Or the cable for the moving part (1a) according to [2].

[5]前記介在が入りこんでいることによって互いに離間した前記絶縁電線(3)同士の間に存在する前記介在の外面からケーブル中心(C1)までの距離L3は、前記絶縁電線(3)の前記介在と接する外面から前記ケーブル中心(C1)までの最小距離L1よりも大きく、かつ前記絶縁電線(3)の中心(C2)から前記ケーブル中心(C1)までの距離L2と同じかそれよりも小さい、[1]乃至[4]の何れか1項に記載の可動部用ケーブル(1)。 [5] The distance L3 from the outer surface of the interposition to the cable center (C1) existing between the insulated wires (3) separated from each other by the inclusion of the interposition is the distance L3 of the insulated wire (3). Greater than the minimum distance L1 from the outer surface in contact with the interposition to the cable center (C1), and equal to or smaller than the distance L2 from the center (C2) of the insulated wire (3) to the cable center (C1). , The cable for moving parts (1) according to any one of [1] to [4].

[6]前記絶縁電線(3)は、導体(31)と、前記導体(31)の周囲を覆う絶縁体(32)と、を有し、 前記絶縁体(32)は、ポリプロピレンをベースとする樹脂組成物からなり、前記シース(5)は、ポリ塩化ビニルをベースとする樹脂組成物からなる、[1]乃至[5]の何れか1項に記載の可動部用ケーブル(1)。 [6] The insulated wire (3) has a conductor (31) and an insulator (32) that covers the periphery of the conductor (31), and the insulator (32) is based on polypropylene. The movable part cable (1) according to any one of [1] to [5], wherein the sheath (5) is made of a resin composition, and the sheath (5) is made of a resin composition based on polyvinyl chloride.

[7]前記絶縁電線(3)は、導体(31)と、前記導体(31)の周囲を覆う絶縁体(32)と、を有し、前記導体は、外径が0.12mm以上0.26mm以下の素線を撚り合わせた撚線導体からなる、[1]乃至[6]の何れか1項に記載の可動部用ケーブル(1)。 [7] The insulated wire (3) has a conductor (31) and an insulator (32) that covers the periphery of the conductor (31), and the conductor has an outer diameter of 0.12 mm or more. The movable part cable (1) according to any one of [1] to [6], which is made of a stranded conductor obtained by twisting a wire of 26 mm or less.

[8]前記2種類の絶縁電線は、電源線(33)と、前記電源線(33)よりも外径が小さい信号線(34)と、で構成され、前記信号線(34)が前記介在を挟んで径方向に対向するように配置されている、[3]に記載の可動部用ケーブル(1)。 [8] The two types of insulated wires are composed of a power supply line (33) and a signal line (34) having an outer diameter smaller than that of the power supply line (33), and the signal line (34) is interposed. The movable part cable (1) according to [3], which is arranged so as to face each other in the radial direction with the cable in between.

[9]前記内層用電線(3a)は、前記外層用電線(3b)よりも外径が小さい、[4]に記載の可動部用ケーブル(1a)。 [9] The movable part cable (1a) according to [4], wherein the inner layer electric wire (3a) has an outer diameter smaller than that of the outer layer electric wire (3b).

以上、本発明の実施の形態を説明したが、上記に記載した実施の形態は特許請求の範囲に係る発明を限定するものではない。また、実施の形態の中で説明した特徴の組合せの全てが発明の課題を解決するための手段に必須であるとは限らない点に留意すべきである。また、本発明は、その趣旨を逸脱しない範囲で適宜変形して実施することが可能である。 Although the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. It should also be noted that not all combinations of features described in the embodiments are essential to the means for solving the problems of the invention. In addition, the present invention can be appropriately modified and implemented without departing from the spirit of the present invention.

1,1a…可動部用ケーブル
2…中心介在(介在)
3…絶縁電線
3a…内層用電線
3b…外層用電線
4…押さえ巻きテープ
5…シース
6…中間介在(介在)
31…導体
32…絶縁体
33…電源線
34…信号線
1,1a ... Cable for moving parts 2 ... Central intervention (intervention)
3 ... Insulated electric wire 3a ... Inner layer electric wire 3b ... Outer layer electric wire 4 ... Presser winding tape 5 ... Sheath 6 ... Intermediate interposition (intervention)
31 ... Conductor 32 ... Insulator 33 ... Power line 34 ... Signal line

Claims (8)

複数本の線状体で構成される介在と、
前記介在と接するように設けられた複数本の絶縁電線と、
前記複数本の絶縁電線の周囲に設けられた押さえ巻きテープと、
前記押さえ巻きテープの周囲に設けられたシースと、を備え、
前記複数本の絶縁電線の少なくとも一部は、周方向に隣り合う前記絶縁電線同士の間に前記介在が入り込んでいることによって前記絶縁電線同士が互いに離間するように撚り合わせられており、
周方向に隣り合う前記絶縁電線同士と、前記隣り合う前記絶縁電線同士の間に存在する前記介在の外面と、前記絶縁電線同士の周囲に接触して設けられた前記押さえ巻きテープとで囲まれる部分が、前記介在が充填されていない空隙部である、
ーブル。
Intervention composed of multiple striatum and
A plurality of insulated wires provided so as to be in contact with the interposition,
With the presser foot tape provided around the plurality of insulated wires,
A sheath provided around the presser foot tape is provided.
At least a part of the plurality of insulated wires is twisted so that the insulated wires are separated from each other by inserting the interposition between the insulated wires adjacent to each other in the circumferential direction .
It is surrounded by the insulating wires adjacent to each other in the circumferential direction, the outer surface of the interposition existing between the adjacent insulating wires, and the presser winding tape provided in contact with the periphery of the insulating wires. The portion is a void portion in which the interposition is not filled.
Cable.
前記複数本の絶縁電線は、外径の異なる2種類の絶縁電線が周方向に沿って配置されている、
請求項1に記載のケーブル。
In the plurality of insulated wires, two types of insulated wires having different outer diameters are arranged along the circumferential direction.
Cable according to claim 1.
前記複数本の絶縁電線は、ケーブル中心に設けられた前記介在の周囲に撚り合わせられた複数本の内層用電線と、前記内層用電線の周囲に設けられた前記介在の周囲に撚り合わせられた複数本の外層用電線と、を有し、
前記複数本の内層用電線と前記複数本の外層用電線との間が前記介在によって離間されており、かつ周方向に隣り合う前記内層用電線同士及び周方向に隣り合う前記外層用電線同士が前記介在によって互いに離間されている、
請求項1に記載のケーブル。
The plurality of insulated wires were twisted around the plurality of inner layer electric wires provided around the interposition provided in the center of the cable and around the interposition provided around the inner layer electric wire. Has multiple outer layer wires,
The plurality of inner layer electric wires and the plurality of outer layer electric wires are separated by the interposition, and the inner layer electric wires adjacent to each other in the circumferential direction and the outer layer electric wires adjacent to each other in the circumferential direction are separated from each other. Separated from each other by the interposition,
Cable according to claim 1.
記介在の前記外面からケーブル中心までの距離L3は、前記絶縁電線の前記介在と接する外面から前記ケーブル中心までの最小距離L1よりも大きく、かつ前記絶縁電線の中心から前記ケーブル中心までの距離L2と同じかそれよりも小さい、
請求項1乃至の何れか1項に記載のケーブル。
Distance from the outer surface of the front Symbol intervening distance L3 to cable center is greater than the minimum distance L1 from the outer surface in contact with the intervention of the insulated wire to the cable center, and to the cable center to center of the insulated wire Same as or smaller than L2,
Cable according to any one of claims 1 to 3.
前記絶縁電線は、導体と、前記導体の周囲を覆う絶縁体と、を有し、
前記絶縁体は、ポリプロピレンをベースとする樹脂組成物からなり、
前記シースは、ポリ塩化ビニルをベースとする樹脂組成物からなる、
請求項1乃至の何れか1項に記載のケーブル。
The insulated wire has a conductor and an insulator that surrounds the conductor.
The insulator comprises a polypropylene-based resin composition.
The sheath is made of a resin composition based on polyvinyl chloride.
Cable according to any one of claims 1 to 4.
前記絶縁電線は、導体と、前記導体の周囲を覆う絶縁体と、を有し、
前記導体は、外径が0.12mm以上0.26mm以下の素線を撚り合わせた撚線導体からなる、
請求項1乃至の何れか1項に記載のケーブル。
The insulated wire has a conductor and an insulator that surrounds the conductor.
The conductor is a stranded conductor obtained by twisting strands having an outer diameter of 0.12 mm or more and 0.26 mm or less.
Cable according to any one of claims 1 to 5.
前記2種類の絶縁電線は、電源線と、前記電源線よりも外径が小さい信号線と、で構成され、前記信号線が前記介在を挟んで径方向に対向するように配置されている、
請求項に記載のケーブル。
The two types of insulated wires are composed of a power supply line and a signal line having an outer diameter smaller than that of the power supply line, and the signal lines are arranged so as to face each other in the radial direction with the interposition interposed therebetween.
Cable of claim 2.
前記内層用電線は、前記外層用電線よりも外径が小さい、
請求項に記載のケーブル。
The inner layer electric wire has a smaller outer diameter than the outer layer electric wire.
Cable of claim 3.
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