JP2559227B2 - Cable conductor manufacturing method - Google Patents

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はケーブル用導体製造方法に関する。The present invention relates to a method for producing a conductor for a cable.

〔従来の技術とその問題点〕[Conventional technology and its problems]

近年、ビルヤ住宅・工場等では、建物の大型化・高層
化、あるいは冷暖房設備の充実・各種OA機器の普及等に
伴って、電力受容が著しく増大している。2. Description of the Related Art In recent years, the acceptance of electric power has been remarkably increasing in Bilya houses and factories due to the increase in size and height of buildings, the enhancement of cooling and heating facilities, and the spread of various OA equipment.

しかして、丸形ケーブルを使用すれば、電圧降下が問
題となり、大型サイズのケーブルを使用せねばならなか
った。そこで、電圧降下の少ない平形ケーブルを使用す
る場合が多くなった。However, if a round cable is used, the voltage drop becomes a problem, and a large size cable must be used. Therefore, there are many cases where a flat cable with a small voltage drop is used.

しかし、平形ケーブルは、一般に、並列に配設される
複数本の導体と、誘導体を被覆する絶縁体及びシース
と、からなり、その絶縁体及びシースを誘導体に被覆す
るには、押出成形等にて行なわれていた。従って、その
冷却時に、該絶縁体及びシースが収縮して、該導体の内
の１本又は数本が軸心と直交方向に位置づれを生じて、
このケーブルに浮き上り部を形成したりしていた。However, a flat cable generally comprises a plurality of conductors arranged in parallel, and an insulator and a sheath that cover the dielectric. To coat the insulator and the sheath with the dielectric, extrusion molding or the like is used. Was being conducted. Therefore, at the time of cooling, the insulator and the sheath contract, and one or several of the conductors are displaced in the direction orthogonal to the axis,
The cable had a raised portion.

そこで、本発明では、このような従来の問題点を解決
して、ケーブルを常に安定した形状に保持することがで
きるケーブル用導体製造方法を提供することを目的とす
る。Therefore, an object of the present invention is to provide a method for manufacturing a conductor for a cable, which can solve such a conventional problem and can always hold a cable in a stable shape.

〔問題点を解決するための手段〕 本発明のケーブル用導体製造方法は、導体を、一対の
案内ローラに挾持させつつ長手方向に沿って走行させる
と共に、その走行中に、該案内ローラ間に塑性変形付与
部を間欠的に介在させて、該導体の他の導体に接触する
対応面に、所定ピッチの凹窪部を形成する。[Means for Solving Problems] A method for manufacturing a cable conductor according to the present invention is configured such that a conductor is run along a longitudinal direction while being held by a pair of guide rollers, and during the run, a space between the guide rollers is provided. By interposing the plastic deformation imparting portion intermittently, a recessed portion having a predetermined pitch is formed on a corresponding surface of the conductor which comes into contact with another conductor.

〔作用〕[Action]

上述の方法によれば、凹窪部により、平行に隣り合う
導体間に、貫通孔が形成されることになるので、この導
体を、押出成形機にて、絶縁体を被覆すれば、その貫通
孔に絶縁体の絶縁材が流れ込んで、ブリッジ部を形成す
る。According to the above-mentioned method, since the through-holes are formed between the conductors which are adjacent to each other in parallel due to the recessed portion, if the conductor is covered with the insulator by the extruder, The insulating material of the insulator flows into the holes to form a bridge portion.

〔実施例〕〔Example〕

以下、実施例を示す図面に基づいて本発明を詳説す
る。Hereinafter, the present invention will be described in detail with reference to the drawings illustrating examples.

本発明に係るケーブル用導体製造方法は、第１図に示
す様に、導体1aを、一対の案内ローラ2,3に挾持させつ
つ流手方向に沿って矢印Ｘ方向に走行させると共に、そ
の走行中に、該案内ローラ2,3間に塑性変形付与部４を
間欠的に介在させて、該導体1aの他の導体1bに接触する
対応面5aに、所定ピッチの凹窪部６を形成するものであ
る。また、この場合、導体1bも案内ローラ2,3に挾持さ
せつつ流手方向に沿って走行させるものであり、この導
体1bの対応面5bにも凹窪部６を形成する。なお、案内ロ
ーラ2,3より上流は、導体1a,1bが相互に隔間させられ、
塑性変形付与部４が該導体1a,1b間に介在しやすいよう
に設定されている。As shown in FIG. 1, the method for manufacturing a conductor for a cable according to the present invention allows a conductor 1a to be held by a pair of guide rollers 2 and 3 and run in the arrow X direction along the flow direction, and the running thereof. Inside, the plastic deformation imparting portion 4 is intermittently interposed between the guide rollers 2 and 3, and the concave portion 6 having a predetermined pitch is formed on the corresponding surface 5a of the conductor 1a which comes into contact with the other conductor 1b. It is a thing. Further, in this case, the conductor 1b is also held by the guide rollers 2 and 3 and travels along the flow direction, and the concave portion 6 is also formed on the corresponding surface 5b of the conductor 1b. In the upstream of the guide rollers 2 and 3, the conductors 1a and 1b are separated from each other,
The plastic deformation imparting portion 4 is set so as to easily intervene between the conductors 1a and 1b.

しかして、塑性変形付与部４は、断面が楕円形状の棒
状態からなり、第２図に示す様に、上記案内ローラ2,3
の上方に設けられる駆動機構７にて、案内ローラ2,3間
（つまり、導体1a,1b間）に間欠的に介在される。即
ち、この駆動機構７は、軸心廻りに回転する一対のベル
ト車8,8と、該ベルト車8,8に巻きかけられるベルト９
と、からなり、ベルト車8,8が、夫々、矢印A,Aの如く回
転すれば、ベルト９が矢印Ｂの如く移動するものであ
る。そして、該ベルト９に、上記塑性変形付与部４を形
成する棒状材が立設状に固着されている。Thus, the plastic deformation imparting portion 4 is in the form of a rod having an elliptical cross section, and as shown in FIG.
A drive mechanism 7 provided above the shaft is intermittently interposed between the guide rollers 2 and 3 (that is, between the conductors 1a and 1b). That is, the drive mechanism 7 includes a pair of belt wheels 8 and 8 that rotate about an axis and a belt 9 that is wound around the belt wheels 8 and 8.
When the belt wheels 8 and 8 rotate as indicated by arrows A and A, respectively, the belt 9 moves as indicated by arrow B. The rod-shaped material forming the plastic deformation imparting portion 4 is fixed to the belt 9 in an upright shape.

従って、ベルト車8,8が矢印Ａの如く回転すれば、ベ
ルト９は矢印Ｂの如く移動し、該塑性変形付与部４が導
体1a,1b間に間欠的に介在することになる。Therefore, when the belt wheels 8 and 8 rotate as shown by arrow A, the belt 9 moves as shown by arrow B, and the plastic deformation imparting portion 4 is intermittently interposed between the conductors 1a and 1b.

そして、このとき、案内ローラ2,3を挾んだ所定長さ
Ｃ間は、その付与部４は、その軸心導体1a,1bの軸心と
直交する状態を保持するように設定され、さらには、該
付与部４の長さ寸法Ｌは、先端部が導体1a,1bより僅か
に下方へ突出する長さとされる。Then, at this time, the applying portion 4 is set so as to maintain a state orthogonal to the axial center of the axial conductors 1a and 1b for a predetermined length C sandwiching the guide rollers 2 and 3. The length dimension L of the applying portion 4 is such that the tip portion thereof projects slightly below the conductors 1a and 1b.

しかして、上述の如く構成されれば、導体1a,1bの矢
印Ｘ方向の走行中に、塑性変形付与部４が間欠的に、案
内ローラ2,3間に介在し、導体1a,1bの付与部４当接部
を、押しつぶして、断面略Ｄの字形状の凹窪部6,6を該
導体1a,1bに形成する。With the above-described structure, the plastic deformation imparting portion 4 is intermittently interposed between the guide rollers 2 and 3 while the conductors 1a and 1b are traveling in the arrow X direction, and the conductors 1a and 1b are imparted. The contact portion of the portion 4 is crushed to form concave portions 6, 6 having a substantially D-shaped cross section in the conductors 1a, 1b.

また、上述のローラ2,3は、夫々、第３図に示す様
に、外周面11に、導体1a,1bの外方面側が嵌合する円周
溝10,10が形成され、軸心廻りに回転可能とされてい
る。As shown in FIG. 3, each of the rollers 2 and 3 described above is formed with a circumferential groove 10, 10 on the outer peripheral surface 11 into which the outer surface side of the conductors 1a, 1b fits. It is supposed to be rotatable.

しかして、上述の方法により凹窪部6,6が形成された
２本の導体1a,1bは、第１図に示す様に、さらに別の２
本の導体1c,1dが合流されて、並列状の４本の導体1a…
からなる導体ユニット12とされる。そして、その後、該
導体ユニット12は押出成形機13に挿入されて、第４図に
示す様に、該導体ユニット12に絶縁体14及びシース15が
被覆されてなる平形ケーブル16とされる。17は４本の導
体1a…を並列状に保持するローラである。Therefore, the two conductors 1a and 1b in which the recessed portions 6 and 6 are formed by the above-mentioned method are further separated from each other as shown in FIG.
The four conductors 1c and 1d are merged to form four parallel conductors 1a ...
The conductor unit 12 is composed of. After that, the conductor unit 12 is inserted into the extrusion molding machine 13 to form a flat cable 16 in which the conductor unit 12 is covered with the insulator 14 and the sheath 15 as shown in FIG. A roller 17 holds the four conductors 1a in parallel.

従って、この場合の平形ケーブル16は、第４図に示す
様に、導体1a,1bの対応面5a,5b間に所定ピッチに、凹窪
部6,6により、貫通孔18が形成され、該貫通孔18に、押
出成形時に絶縁体14の絶縁材が流れ込んで、絶縁長辺部
14a,14bを連結するブリッジ部19が形成される。Therefore, in the flat cable 16 in this case, as shown in FIG. 4, through holes 18 are formed between the corresponding surfaces 5a, 5b of the conductors 1a, 1b at a predetermined pitch by the concave recesses 6, 6. The insulating material of the insulator 14 flows into the through hole 18 during extrusion molding, and
A bridge portion 19 that connects 14a and 14b is formed.

そして、上述のように、ブリッジ部19が形成されれ
ば、この平形ケーブル16は、常に安定した形状とするこ
とができる。つまり、通常、この種の平形ケーブルは、
絶縁体14及びシース15の冷却時の収縮により、短辺部2
1,21から内方向への押圧力が作用する場合が多く、この
場合においても、このブリッジ部19により、絶縁体14の
絶縁長辺部14a,14bは平行状態が保持され、各導体間に
ずれを生じさせないと共に、長辺部22,22に浮き上りを
生じさせない。If the bridge portion 19 is formed as described above, the flat cable 16 can always have a stable shape. So usually this type of flat cable
Due to contraction of the insulator 14 and the sheath 15 during cooling, the short side 2
In many cases, a pressing force inward from 1,21 acts, and even in this case, the insulating long side portions 14a, 14b of the insulator 14 are maintained in a parallel state by the bridge portion 19, and between the conductors. It does not cause a shift, and does not cause the long side portions 22, 22 to rise.

次に、第５図と第６図は、案内ローラ2,3間に１本の
導体1aのみが走行する場合を示し、この場合、案内ロー
ラ３には、第３図に示したような円周溝10が形成され
ず、また、塑性変形付与部４は、断面が半楕円形状のも
のが使用されている。Next, FIGS. 5 and 6 show the case where only one conductor 1a travels between the guide rollers 2 and 3, and in this case, the guide roller 3 has a circle as shown in FIG. The circumferential groove 10 is not formed, and the plastic deformation imparting portion 4 has a semi-elliptical cross section.

即ち、この場合も、上述の場合と同様に、導体1aの対
応面5aに所定ピッチの凹窪部６が形成されるものであ
り、この凹窪部６が形成された導体1aは、３本の導体1
b,1c,1dが合成されて導体ユニット12とされ、その後、
絶縁体14及びシース15が被覆されて、第７図に示す様な
平形ケーブル16が形成される。That is, also in this case, as in the case described above, the recessed portions 6 having a predetermined pitch are formed on the corresponding surface 5a of the conductor 1a, and the conductor 1a having the recessed recessed portions 6 has three conductors 1a. Conductor 1
b, 1c, 1d are combined to form the conductor unit 12, then,
The insulator 14 and the sheath 15 are covered to form a flat cable 16 as shown in FIG.

従って、この場合の平形ケーブル16も、絶縁体14にブ
リッジ部19が形成され、常に安定した形状に保持され
る。Therefore, also in the flat cable 16 in this case, the bridge portion 19 is formed in the insulator 14 and is always held in a stable shape.

次に、第８図と第９図は、塑性変形付与部４の変形例
を示し、この場合、上述の様な駆動機構７を使用せず、
一方の案内ローラ３に付与部４を形成している。即ち、
円周溝10の一部に、第９図に示す様に、外周面11と同一
面となる圧接面を形成し、該圧接面をもって付与部４と
するものであり、この場合も、この案内ローラ2,3に導
体1aを挾持させつつ長手方向に沿って走行させれば、案
内ローラ2,3は、その軸心廻りに回転して、案内ローラ
３の圧接面（つまり、付与部４）が該案内ローラ2,3間
に間欠的に介在することとなり、その圧接面が、導体1a
の付与部４当接部を、押しつぶして、凹窪部６を該導体
1aに形成する。Next, FIG. 8 and FIG. 9 show a modified example of the plastic deformation imparting portion 4, in which case the drive mechanism 7 as described above is not used,
An application portion 4 is formed on one of the guide rollers 3. That is,
As shown in FIG. 9, a pressure contact surface that is the same as the outer peripheral surface 11 is formed in a part of the circumferential groove 10, and the pressure contact surface serves as the applying portion 4. Also in this case, If the conductors 1a are held by the rollers 2 and 3 and run along the longitudinal direction, the guide rollers 2 and 3 rotate around their axes, and the pressure contact surface of the guide roller 3 (that is, the applying portion 4) Are intermittently interposed between the guide rollers 2 and 3, and the pressure contact surface is the conductor 1a.
The contact portion of the conductor 4 is crushed to form the concave portion 6 in the conductor.
Form 1a.

しかして、導体1a…は良導電性金属からなり、単一線
又は複数の細線を撚り合わせて構成され、また、絶縁体
14は架橋ポリエチレン等の合成樹脂からなり、さらに
は、シース14はゴム又は塩化ビニル、ポリエチレン等の
合成樹脂からなる。Thus, the conductors 1a ... Are made of a highly conductive metal and are formed by twisting a single wire or a plurality of thin wires, and are made of an insulating material.
14 is made of synthetic resin such as cross-linked polyethylene, and the sheath 14 is made of rubber or synthetic resin such as vinyl chloride and polyethylene.

本発明は図示の実施例に限定されず、本発明の要旨を
逸脱しない範囲で設計変更自由であり、例えば、第２図
中の一対のベルト車8,8とベルト９と棒状変形付与部４
…に代えて、十分に長尺の複数本の棒状変形付与部４…
を、一軸心廻りに水車のように回転させるように製造装
置を構成してもよい。また、凹窪部６の形状は、半長円
形や半円形や矩形とすることも自由である。また、凹窪
部６の所定ピッチのピッチ間は自由であり、導体ユニッ
ト12を形成する導体の数も自由である。また、導体ユニ
ット12を構成するすべての導体間に貫通孔18が形成され
るように、各導体に凹窪部６を形成するようにするも好
ましい。さらに、導体1a…の横断面形状を、円形状とせ
ずに、正方形状乃至長方形状とするも自由であり、さら
には、この方法により、製造された導体1aは、平形ケー
ブル以外の丸形ケーブル等に使用するも勿論自由であ
る。The present invention is not limited to the illustrated embodiment, and the design can be freely changed without departing from the gist of the present invention. For example, the pair of belt wheels 8 and 8, the belt 9 and the rod-shaped deformation imparting portion 4 in FIG.
Instead of ..., a plurality of sufficiently long rod-shaped deformation imparting portions 4 ...
The manufacturing apparatus may be configured to rotate around a uniaxial center like a water turbine. Moreover, the shape of the concave portion 6 may be a semi-elliptical shape, a semi-circular shape, or a rectangular shape. Further, the pitch of the recessed portions 6 is a predetermined pitch, and the number of conductors forming the conductor unit 12 is also free. Further, it is also preferable to form the concave portion 6 in each conductor so that the through hole 18 is formed between all the conductors forming the conductor unit 12. Further, the cross-sectional shape of the conductors 1a ... Is not limited to a circular shape, and may be a square shape or a rectangular shape. Furthermore, the conductor 1a manufactured by this method is a round cable other than a flat cable. Of course, it is also free to use.

〔発明の効果〕 本発明のケーブル用導体製造方法によれば、隣り合う
導体1a,1b間に、凹窪部6,6により、貫通孔18が形成さ
れ、この導体1a,1bに絶縁体14を被覆すれば、その貫通
孔18に絶縁体14の絶縁材が流れ込んで、絶縁長辺部14a,
14bを連結するブリッジ部19が形成されることになる。
即ち、絶縁体14及びシース15の冷却時の収縮により、内
方向への押圧力が作用した場合においても、このブリッ
ジ部19により、絶縁体14の絶縁長辺部14a,14bは平行状
態が保持され、導体1a…にずれを生じさせない。このよ
うに優れたケーブルを、連続的にかつ容易に製造するこ
とが出来る。[Effects of the Invention] According to the cable conductor manufacturing method of the present invention, the through holes 18 are formed by the recessed portions 6 and 6 between the adjacent conductors 1a and 1b, and the insulators 14 are formed in the conductors 1a and 1b. If the insulating material of the insulator 14 flows into the through-hole 18, the insulating long side portion 14a,
A bridge portion 19 that connects 14b is formed.
That is, even when an inward pressing force is applied due to contraction of the insulator 14 and the sheath 15 during cooling, the bridge long portion 19 keeps the insulating long side portions 14a and 14b of the insulator 14 parallel to each other. Therefore, the conductors 1a ... Do not shift. Such an excellent cable can be continuously and easily manufactured.

【図面の簡単な説明】[Brief description of drawings]

第１図は本発明の方法に使用する案内ローラ及び塑性変
形付与部の一実施例を示す平面図、第２図はその製造装
置の正面図、第３図はその拡大側面図、第４図はこの方
法により製造された導体を使用した平形ケーブルの断面
図、第５図は案内ローラ及び塑性変形付与部の他の実施
例を示す断面平面図、第６図はその拡大側面図、第７図
は平形ケーブルの断面図、第８図は他の例の塑性変形付
与部の一部断面正面図、第９図はその斜視図である。 1a……導体、2,3……案内ローラ、４……塑性変形付与
部、5a……対応面、６……凹窪部。FIG. 1 is a plan view showing an embodiment of a guide roller and a plastic deformation imparting portion used in the method of the present invention, FIG. 2 is a front view of its manufacturing apparatus, FIG. 3 is its enlarged side view, and FIG. Is a sectional view of a flat cable using a conductor manufactured by this method, FIG. 5 is a sectional plan view showing another embodiment of the guide roller and the plastic deformation imparting portion, FIG. 6 is its enlarged side view, and FIG. FIG. 8 is a sectional view of a flat cable, FIG. 8 is a partial sectional front view of a plastic deformation imparting portion of another example, and FIG. 9 is a perspective view thereof. 1a ... conductor, 2,3 ... guide roller, 4 ... plastic deformation imparting part, 5a ... corresponding surface, 6 ... concave concave part.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】導体を、一対の案内ローラに挾持させつつ
長手方向に沿って走行させると共に、その走行中に、該
案内ローラ間に塑性変形付与部を間欠的に介在させて、
誘導体の他の導体に接触する対応面に、所定ピッチの凹
窪部を形成することを特徴とするケーブル用導体製造方
法。1. A conductor is run along a longitudinal direction while being held by a pair of guide rollers, and a plastic deformation imparting portion is intermittently interposed between the guide rollers during the running,
A method for producing a conductor for a cable, characterized in that a concave portion having a predetermined pitch is formed on a corresponding surface of the dielectric which comes into contact with another conductor.