JP4232984B2 - Cable sheath stripping tool - Google Patents

Cable sheath stripping tool Download PDF

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JP4232984B2
JP4232984B2 JP2006008730A JP2006008730A JP4232984B2 JP 4232984 B2 JP4232984 B2 JP 4232984B2 JP 2006008730 A JP2006008730 A JP 2006008730A JP 2006008730 A JP2006008730 A JP 2006008730A JP 4232984 B2 JP4232984 B2 JP 4232984B2
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sheath
cable
rotating disk
turntable
stripping tool
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JP2007195275A (en
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博 興梠
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株式会社きんでん
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Description

本発明は、高圧電力用ケーブルの端末処理に際してシース(外側保護被覆)を剥ぎ取るための工具に関する。   The present invention relates to a tool for stripping off a sheath (outer protective coating) when terminating a high-voltage power cable.

高圧電力を輸送するための配電ケーブルには、架橋ポリエチレン絶縁ケーブル(CVケーブル)をはじめとするプラスチック系ケーブルが最も広く利用されている。図3は、比較的単純な内部構造を有する単心ケーブル9の断面図である。中心側から順に、銅線を束ねた導体91、内部半導電層92、架橋ポリエチレン等からなる絶縁体93、軟銅テープ94、紙テープ95、ポリ塩化ビニルや耐熱ポリエチレン等からなるシース(外側保護被覆)96を同心状に積層した構造になっている。   Plastic cables such as cross-linked polyethylene insulated cables (CV cables) are the most widely used distribution cables for transporting high-voltage power. FIG. 3 is a cross-sectional view of a single-core cable 9 having a relatively simple internal structure. In order from the center side, a conductor 91 in which copper wires are bundled, an inner semiconductive layer 92, an insulator 93 made of cross-linked polyethylene, an annealed copper tape 94, a paper tape 95, a sheath made of polyvinyl chloride, heat-resistant polyethylene, or the like (outer protective coating) It is the structure which laminated | stacked 96 concentrically.

この種の高圧電力用ケーブル(以下、単に「ケーブル」と称する。)の布設工事においては、ケーブルの端末を接続する際に、シース96を周方向及び延長軸方向に切開して剥ぎ取り、露出した紙テープ95及び軟銅テープ94の一部をめくり、さらに絶縁体93の一部を剥ぎ取る必要がある。かかる端末処理作業に使用される工具としては、電工ナイフのほか、例えば特許文献1〜3に記載されたものが知られている。これらの工具は、グリップと一体に設けた略C字状のケーブル把持部にケーブルを挿入して、ケーブル把持部の内側に設けた回転刃によりケーブルを挟圧しながら、工具をケーブルの周方向に回転させることにり、シースを一定の深さで周方向に切開できるように構成されたものである。回転刃は、グリップ内に設けた支持手段によってケーブルの径方向に進退し、切り込み深さを調節することができる。ケーブル把持部の内側には、ケーブルの周面に当接するガイドローラが複数個取り付けられて、工具の回転操作を円滑にする。さらに、回転刃の切開方向を90度回動させて、ケーブル把持部に挿入したケーブルを延長軸方向にも切開することができるようにしたものも公知である。
実開昭55−64829号公報 実開昭55−98111号公報 特開平5−219619号公報
In laying work of this type of high-voltage power cable (hereinafter simply referred to as “cable”), when connecting the end of the cable, the sheath 96 is cut open in the circumferential direction and the extension axis direction, and is exposed. It is necessary to turn a part of the paper tape 95 and the annealed copper tape 94 and to remove a part of the insulator 93. As a tool used for such terminal processing work, in addition to the electric knife, for example, those described in Patent Documents 1 to 3 are known. In these tools, the cable is inserted into a substantially C-shaped cable gripping part provided integrally with the grip, and the tool is moved in the circumferential direction of the cable while pressing the cable with a rotary blade provided inside the cable gripping part. By rotating, the sheath can be incised in the circumferential direction at a certain depth. The rotary blade can be advanced and retracted in the radial direction of the cable by the support means provided in the grip, and the cutting depth can be adjusted. A plurality of guide rollers that are in contact with the peripheral surface of the cable are attached to the inside of the cable gripping portion to facilitate the rotation operation of the tool. Further, there is also known one in which the cutting direction of the rotary blade is rotated 90 degrees so that the cable inserted into the cable gripping portion can be cut also in the extension axis direction.
Japanese Utility Model Publication No. 55-64829 Japanese Utility Model Publication No. 55-98111 Japanese Patent Laid-Open No. 5-219619

シースを切開するときに、電工ナイフや回転刃の刃先で軟銅テープの表面が傷つけられると、高圧電流によって損傷箇所に局所的な発熱が生じ、ケーブルが焼失したり、接地端と非接地端との間に生じる大きな電位差が損傷箇所のトラッキング劣化を招いて絶縁破壊に至るといった重大事故を招く。そのため、ケーブルの端末処理を行う作業員には技能検定が義務づけられているが、強靱な素材からなるシースを精度良く切開するのは、技能を有する作業者にとっても困難な作業である。   When cutting the sheath, if the surface of the soft copper tape is damaged by the edge of an electric knife or rotary blade, local heat will be generated at the damaged part due to the high voltage current, the cable will be burned out, and the grounding end and non-grounding end A large potential difference between the two leads to a tracking failure at the damaged part, resulting in a serious accident such as dielectric breakdown. For this reason, workers who perform cable terminal processing are obliged to perform skill tests. However, it is difficult for a skilled worker to accurately incise a sheath made of a tough material.

また、シースの厚さは、厳密には均一でなく、ケーブルの種類によって十分の数ミリ程度のばらつきがある。さらに、連続する1本のケーブルでも、切開する位置によってシースの厚さは微妙に変化する。上記従来の工具は、回転刃の切り込み深さを調節しうるように構成されてはいるが、回転刃をシースに食い込ませたときに刃先がどこまで達しているかを視認することはできないので、軟銅テープを傷つけないぎりぎりの深さに刃先位置を調節するのは、現実的には困難である。   In addition, the thickness of the sheath is not strictly uniform, and varies sufficiently by several millimeters depending on the type of cable. Further, even with a single continuous cable, the thickness of the sheath slightly changes depending on the position of incision. Although the conventional tool is configured so that the cutting depth of the rotary blade can be adjusted, it is not possible to visually recognize how far the cutting edge has reached when the rotary blade is bitten into the sheath. In practice, it is difficult to adjust the position of the blade edge to a depth that does not damage the tape.

本発明はかかる事情に鑑みてなされたもので、軟銅テープを傷つけずにシースを容易に剥ぎ取ることのできるケーブルシース剥取工具を提供し、もってケーブルの端末処理作業における施工品質や作業性、安全性等を向上させようとするものである。   The present invention has been made in view of such circumstances, and provides a cable sheath stripping tool that can easily strip the sheath without damaging the soft copper tape, so that the construction quality and workability in the cable terminal processing work, It is intended to improve safety and the like.

上述の課題を解決するため、本発明のケーブルシース剥取工具は、平面視円形の金属製回転盤を具備し、該回転盤は周縁部の厚さが0.3〜1.0mmで、周面が回転軸に平行な円筒状の平滑面をなすように形成され、この回転盤を回転させて、上記周面をケーブルのシースに押し当てることにより、回転盤とシースとの摩擦熱でシースの表面を軟化させつつシースを削り取るように構成される。   In order to solve the above-described problems, a cable sheath stripping tool of the present invention includes a circular metal turntable in plan view, and the turntable has a peripheral edge thickness of 0.3 to 1.0 mm. The surface is formed so as to form a cylindrical smooth surface parallel to the rotation axis. By rotating the rotating disk and pressing the peripheral surface against the sheath of the cable, the sheath is heated by the frictional heat between the rotating disk and the sheath. The sheath is scraped off while softening the surface.

この発明は、適当な厚みを有する金属製の板体と、ポリ塩化ビニルや耐熱ポリエチレン等からなるシースとの高速摩擦によって、シースが好適に切削されることを見出してなされたものである。鋭利な刃先でシースを切開するのではないから、シースの内側にある軟銅テープを傷つけないでシースを剥ぎ取ることができる。   The present invention has been made by finding that the sheath is suitably cut by high-speed friction between a metal plate having an appropriate thickness and a sheath made of polyvinyl chloride, heat-resistant polyethylene or the like. Since the sheath is not cut with a sharp blade edge, the sheath can be peeled off without damaging the soft copper tape inside the sheath.

回転盤の回転速度については、実用性の検証を経て、周速20〜50m/秒で回転するのが好ましいことを確認した。上記範囲を超える速度になると、切削速度が速すぎて扱いにくくなるとともに、軟銅テープを傷つけやすくなる。一方、上記範囲よりも遅い速度になると、十分な摩擦力が得られず、施工性が低下する。   About the rotational speed of the turntable, it was confirmed that it is preferable to rotate at a peripheral speed of 20 to 50 m / sec through verification of practicality. When the speed exceeds the above range, the cutting speed is too high and the handling becomes difficult, and the annealed copper tape is easily damaged. On the other hand, if the speed is slower than the above range, sufficient frictional force cannot be obtained and workability is deteriorated.

上記発明において、回転盤の片面に複数枚の羽根片が突設されるとともに、回転盤は一対の側板と略渦巻状の流路を形成する内外の湾曲板とからなる集塵カバーによって囲まれ、上記流路の後部には集塵袋が取り付けられて、回転盤が回転したときに上記羽根片によって生じる渦流とともにシースの削り屑が上記集塵袋内に回収されるように構成すれば、施工性はさらに向上する。 In the above invention, a plurality of blade pieces is protruded on one surface of the rotating disk Rutotomoni, turntable is surrounded by a dust collecting cover made inside and outside of the curved plate forming a pair of side plates substantially spiral flow path If a dust collection bag is attached to the rear part of the flow path and the sheath shavings are collected in the dust collection bag together with the vortex generated by the blade pieces when the turntable rotates , Workability is further improved.

上述のように構成される本発明のケーブルシース剥取工具は、鋭利な刃先を有する刃体ではなく、円筒状の平滑な周面を有する回転盤によってシースを削り取るように構成されているので、シースの内側にある軟銅テープを傷つけずにシースを剥ぎ取ることができる。これにより、ケーブルの端末処理作業における施工品質や作業性、安全性等が向上する。   Since the cable sheath stripping tool of the present invention configured as described above is configured to scrape the sheath by a rotating disk having a cylindrical smooth peripheral surface, not a blade body having a sharp cutting edge, The sheath can be peeled off without damaging the annealed copper tape inside the sheath. Thereby, the construction quality, workability, safety, etc. in the terminal processing work of the cable are improved.

図1及び図2は本発明の実施形態に係るケーブルシース剥取工具の正面形状及び側面形状を一部破断して示す図である。このケーブルシース剥取工具1は、全体として、ハンディタイプのディスクグラインダを小型化したような形状に類似している。主要な構成要素は、グリップ部2、電動モータ(図示せず)を内蔵した回転駆動部3、円形の金属製回転盤4、回転盤4を覆う集塵カバー5及び集塵袋6である。   FIG.1 and FIG.2 is a figure which fractures | ruptures and shows the front shape and side surface shape of the cable sheath stripping tool which concern on embodiment of this invention. The cable sheath stripping tool 1 is generally similar in shape to a handy type disk grinder that is miniaturized. The main components are a grip part 2, a rotation drive part 3 incorporating an electric motor (not shown), a circular metal turntable 4, a dust collection cover 5 and a dust collection bag 6 that cover the turntable 4.

グリップ部2は、片手で把持しうる程度の細長い形状をなしている。回転駆動部3はグリップ部2の先端に設けられており、その回転軸31はグリップ部2の軸方向と略直交している。回転駆動部3の駆動力には充電池又は交流電源が利用される。   The grip portion 2 has an elongated shape that can be held with one hand. The rotation drive unit 3 is provided at the tip of the grip unit 2, and the rotation shaft 31 is substantially orthogonal to the axial direction of the grip unit 2. A rechargeable battery or an AC power source is used for the driving force of the rotation driving unit 3.

回転盤4は、例えば亜鉛メッキ鋼板、銅板、アルマイト処理したアルミ板等の金属板からなる平板体で、直径が概ね5〜8cm、厚さが0.3〜1.0mmとなるように形成されている。回転盤4は、その中心が回転軸31に結合されて一方向(図2における反時計回り方向)に回転する。回転盤4の一部はグリップ部2の先端方向に突出しており、この突出した周縁部でシースを切削する。回転盤4の周面は、回転軸31に平行な円筒状の平滑面となっている。つまり、この回転盤4は鋭利な刃を有していない。周縁部のエッジは略直角に形成されているが、このエッジは多少丸みを帯びていてもよい。   The turntable 4 is a flat plate made of a metal plate such as a galvanized steel plate, a copper plate, or an anodized aluminum plate, and is formed to have a diameter of approximately 5 to 8 cm and a thickness of 0.3 to 1.0 mm. ing. The center of the rotary disk 4 is coupled to the rotary shaft 31 and rotates in one direction (counterclockwise direction in FIG. 2). A part of the rotating disk 4 protrudes toward the distal end of the grip portion 2, and the sheath is cut at the protruding peripheral edge portion. The peripheral surface of the turntable 4 is a cylindrical smooth surface parallel to the rotation shaft 31. That is, the rotating disk 4 does not have a sharp blade. The edge of the peripheral edge is formed at a substantially right angle, but this edge may be somewhat rounded.

回転盤4の片面には、回転盤4を構成する板体を切り起こして形成した略矩形の羽根片41が複数枚(例示形態では8枚)、突設されている。さらに、回転盤4は、一対の側板51、52と、略渦巻状の流路を形成する内外の湾曲板53、54とからなる集塵カバー5によって囲まれており、内外の湾曲板53、54の下端部の間から回転盤4の周縁部のが一部、露出している。回転盤4が回転したときに羽根片41は図2中に鎖線で示すような渦流を起こし、この渦流が内外の湾曲板の間を経由して後部へと押し流される。この流路の後部には集塵袋6が取り付けられている。   On one surface of the rotating disk 4, a plurality of (approximately 8 in the illustrated embodiment) substantially rectangular blade pieces 41 formed by cutting and raising the plate constituting the rotating disk 4 are provided in a projecting manner. Further, the rotating disk 4 is surrounded by a dust collecting cover 5 including a pair of side plates 51 and 52 and inner and outer curved plates 53 and 54 that form a substantially spiral flow path. A part of the peripheral edge of the turntable 4 is exposed from between the lower end portions of 54. When the rotating disk 4 rotates, the blade piece 41 causes a vortex as shown by a chain line in FIG. 2, and this vortex flows between the inner and outer curved plates and is pushed to the rear. A dust bag 6 is attached to the rear of the flow path.

ケーブル9のシース96を剥ぎ取る際には、グリップ部2を把持して、回転している回転盤4の周面をシース96に押し当てる。シース96の材料であるポリ塩化ビニルや耐熱ポリエチレンの軟化温度は80〜100℃前後なので、適度な圧力で数秒間、回転盤4をシース96に押し当てると、その摩擦熱でシース96が程よく軟化し、シース96が徐々に削り取られる。   When the sheath 96 of the cable 9 is peeled off, the grip portion 2 is gripped and the peripheral surface of the rotating turntable 4 is pressed against the sheath 96. Since the softening temperature of polyvinyl chloride and heat-resistant polyethylene, which are the materials of the sheath 96, is around 80 to 100 ° C., the sheath 96 is moderately softened by the frictional heat when the rotating disk 4 is pressed against the sheath 96 at a moderate pressure for several seconds. The sheath 96 is gradually scraped off.

回転盤4の回転速度は、回転盤4の大きさ及び厚さ、剥ぎ取るシースの径や厚さ、また夏季と冬季で異なるシースの硬さに応じて、適切に設定されるのが望ましい。実験的検証によって得られた好適な回転速度は、夏季条件下で、直径5〜6cm・厚さ0.3〜0.5の回転盤4を、交流電圧100V・定格出力80Wの電動モータで駆動したときに8000〜10000rpm(周速に換算して20〜30m/秒)、また冬季条件下で、直径7〜8cm・厚さ0.5〜0.8mmの回転盤4を、交流電圧100V・定格出力100Wの電動モータで駆動したときに10000〜12000rpm(周速に換算して36〜50m/秒)となった。   It is desirable that the rotation speed of the turntable 4 be appropriately set according to the size and thickness of the turntable 4, the diameter and thickness of the sheath to be peeled off, and the hardness of the sheath that is different in summer and winter. The preferred rotation speed obtained by experimental verification is that the rotating disk 4 having a diameter of 5 to 6 cm and a thickness of 0.3 to 0.5 is driven by an electric motor having an AC voltage of 100 V and a rated output of 80 W under summer conditions. 8000 to 10000 rpm (20 to 30 m / sec in terms of peripheral speed), and under the winter conditions, the rotating disk 4 having a diameter of 7 to 8 cm and a thickness of 0.5 to 0.8 mm is replaced with an AC voltage of 100 V. When driven by an electric motor with a rated output of 100 W, the speed was 10,000 to 12,000 rpm (36 to 50 m / sec in terms of peripheral speed).

シース96の削り屑は、回転盤4が生じる渦流によって集塵袋6に回収される。シース96の残厚が僅かになれば、摩擦熱によって軟化しているシース96を容易に剥ぎ取ることができる。したがって、通常の注意深さを持って作業している限り、回転盤4の周面は、シース96の内側にある紙テープ95に達することはあっても、その内側にある軟銅テープ94にまで達することはない。こうして、軟銅テープ94が安全に保護される。なお、図示した使用状態は、シース96を延長軸方向に切削する場合を示しているが、シース96を輪切り方向に切削する場合も同様である。   The shavings of the sheath 96 are collected in the dust bag 6 by the vortex generated by the rotating disk 4. If the remaining thickness of the sheath 96 becomes small, the sheath 96 that has been softened by frictional heat can be easily peeled off. Therefore, as long as the work is carried out with the usual careful depth, the peripheral surface of the rotating disk 4 reaches the paper tape 95 inside the sheath 96 but reaches the soft copper tape 94 inside it. There is nothing. Thus, the annealed copper tape 94 is safely protected. The illustrated usage state shows the case where the sheath 96 is cut in the direction of the extension axis, but the same applies to the case where the sheath 96 is cut in the ring cutting direction.

本発明の実施形態に係るケーブルシース剥取工具の一部破断正面図である。It is a partially broken front view of the cable sheath peeling tool which concerns on embodiment of this invention. 同じく、ケーブルシース剥取工具の一部破断側面図である。Similarly, it is a partially broken side view of the cable sheath stripping tool. ケーブルの内部構造を簡略的に示す断面図である。It is sectional drawing which shows the internal structure of a cable simply.

符号の説明Explanation of symbols

1 ケーブルシース剥取工具
2 グリップ部
3 回転駆動部
4 回転盤
41 羽根片
5 集塵カバー
6 集塵袋
9 ケーブル
96 シース
DESCRIPTION OF SYMBOLS 1 Cable sheath stripping tool 2 Grip part 3 Rotation drive part 4 Turntable 41 Blade piece 5 Dust collection cover 6 Dust collection bag 9 Cable 96 Sheath

Claims (3)

平面視円形の金属製回転盤を具備し、該回転盤は周縁部の厚さが0.3〜1.0mmで、周面が回転軸に平行な円筒状の平滑面をなすように形成され、この回転盤を回転させて、上記周面をケーブルのシースに押し当てることにより、回転盤とシースとの摩擦熱でシースの表面を軟化させつつシースを削り取るように構成されたケーブルシース剥取工具。   It has a metal turntable with a circular shape in plan view, and the turntable is formed so that the peripheral portion has a thickness of 0.3 to 1.0 mm and the peripheral surface forms a cylindrical smooth surface parallel to the rotation axis. Rotating the rotating disk and pressing the peripheral surface against the sheath of the cable, the cable sheath peeling configured to scrape the sheath while softening the surface of the sheath by frictional heat between the rotating disk and the sheath tool. 回転盤は、周速20〜50m/秒で回転するように構成された請求項1記載のケーブルシース剥取工具。   The cable sheath stripping tool according to claim 1, wherein the rotating disk is configured to rotate at a peripheral speed of 20 to 50 m / sec. 回転盤の片面に複数枚の羽根片が突設されるとともに、回転盤は一対の側板と略渦巻状の流路を形成する内外の湾曲板とからなる集塵カバーによって囲まれ、上記流路の後部には集塵袋が取り付けられて、回転盤が回転したときに上記羽根片によって生じる渦流とともにシースの削り屑が上記集塵袋内に回収されることを特徴とする請求項1に記載のケーブルシース剥取工具。 Rutotomoni plurality of blade pieces is protruded on one surface of the rotating disk, the rotating disk is surrounded by a dust collecting cover made inside and outside of the curved plate forming a pair of side plates substantially spiral flow path, the flow path and dust bag is attached to the rear of, claim 1 turntable shavings sheath with vortex flow generated by the blade pieces when the rotation is characterized in that it is recovered in the dust collecting bag Cable sheath stripping tool.
JP2006008730A 2006-01-17 2006-01-17 Cable sheath stripping tool Active JP4232984B2 (en)

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JP4232984B2 true JP4232984B2 (en) 2009-03-04

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Publication number Priority date Publication date Assignee Title
KR102138456B1 (en) * 2019-01-18 2020-07-27 양희성 Integrated power cable towing equipment capable of continuous removal and installation of power cabling

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102138456B1 (en) * 2019-01-18 2020-07-27 양희성 Integrated power cable towing equipment capable of continuous removal and installation of power cabling

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