JP3824799B2 - Method of reducing the diameter of a normal temperature shrinkable cylindrical member - Google Patents

Method of reducing the diameter of a normal temperature shrinkable cylindrical member Download PDF

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Publication number
JP3824799B2
JP3824799B2 JP01775699A JP1775699A JP3824799B2 JP 3824799 B2 JP3824799 B2 JP 3824799B2 JP 01775699 A JP01775699 A JP 01775699A JP 1775699 A JP1775699 A JP 1775699A JP 3824799 B2 JP3824799 B2 JP 3824799B2
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Japan
Prior art keywords
diameter
cylindrical
cylindrical member
guide member
cold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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JP01775699A
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Japanese (ja)
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JP2000224750A (en
Inventor
裕士 桜井
茂 藤井
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THE FURUKAW ELECTRIC CO., LTD.
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THE FURUKAW ELECTRIC CO., LTD.
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
    • H02G15/182—Cable junctions protected by sleeves, e.g. for communication cable held in expanded condition in radial direction prior to installation
    • H02G15/1826—Cable junctions protected by sleeves, e.g. for communication cable held in expanded condition in radial direction prior to installation on a removable hollow core, e.g. a tube
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables

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  • Processing Of Terminals (AREA)
  • Cable Accessories (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、架橋ポリエチレン絶縁ビニルシースケーブル（ＣＶケーブル）やゴムシースケーブル等のケーブルの端末処理や接続処理に使用する常温収縮型の筒状部材の縮径方法に関するものである。
【０００２】
【従来の技術】
近年、ケーブルの端末処理や接続処理に常温収縮型の製品が使用されつつある。この常温収縮型の製品は、図１２に示すように、シリコーンゴム等で製造されたこの常温収縮型の筒状部材１を拡径支持体２で拡径支持したものである。拡径支持体２は、プラスチック製リボンをスパイラル円筒状に巻回したもので、この拡径支持体２の外周に筒状部材１を配置することによって、筒状部材１を拡径状態に保持するものである。筒状部材１は、該筒状部材１を取り付ける箇所の外径の数倍に拡径され、この状態で保持されるものである。
【０００３】
筒状部材１の使用に際して、これを縮径させる場合には、拡径状態に保持した拡径支持体２を、例えばケーブル３の端末部の外周に挿入し、しかる後拡径支持体２を、その一端側から引き出すことによって取り除くことにより行う。拡径支持体２は、プラスチック製リボンをスパイラル円筒状に巻回したものであるので、その一端側から引き出すことによって順次解体することができる。これによって筒状部材１は収縮してケーブルの外周に密着固定するものである。
【０００４】
【発明が解決しようとする課題】
しかしながら、従来の筒状部材１の縮径方法によると、拡径支持体２がプラスチック製リボンをスパイラル円筒状に巻回したものであるので、該リボンをその一端側から引き出すことによって拡径支持体２を順次解体する際、引き出したリボン片がケーブルに絡み付かないように、螺旋を解く方向に回しながら引き出さなければならず、その作業が非常に面倒であるという問題があった。
【０００５】
【課題を解決するための手段】
本発明は上記の如き課題を解決した筒状部材の縮径方法を提供するものである。
【０００６】
本発明に係る常温収縮型の筒状部材の縮径方法は、縮径部を有する円筒状のガイド部材と、該ガイド部材の内径より若干小さい外径を有し前記ガイド部材に挿入されている円筒状の硬質挿入部材とから成る常温収縮型の筒状部材の拡径・保持装置によって拡径・保持した常温収縮型の筒状部材内の前記硬質挿入部材にケーブルの端部を挿入して、前記常温収縮型の筒状部材をケーブルの外周の所定位置に位置させた後、硬質挿入部材とガイド部材を抜き取ることによって前記常温収縮型の筒状部材を前記所定位置に縮径させることを特徴とする方法である。
【０００７】
【発明の実施の形態】
以下本発明の実施の形態を図を参照して説明する。図１（イ）（ロ）は常温収縮型の筒状部材（以下単に筒状部材という）３０の拡径・保持装置で使用するガイド部材１０の正面図と側面図である。このガイド部材１０は、プラスチック等で形成した円筒体の長手方向に基部１０Ａを残した状態で複数本のスリット１０Ｂを設け、該スリット１０Ｂを設けた所定長の部分を縮径部１０Ｃとしたものである。なお符号１０Ｄは基部１０Ａ側に設けた指当部である。この指当部１０Ｄの形状は特に限定するものではなく、また省略してもよい。
【０００８】
図２（イ）（ロ）は筒状部材３０の拡径・保持装置で使用する硬質挿入部材２０の正面図と側面図である。この硬質挿入部材２０は、プラスチック等で形成された円筒状のもので、円筒部２０Ａの外径は、前記ガイド部材１０の内径より若干小さく形成されている。また円筒部２０Ａの長さは、ガイド部材１０の縮径部１０Ｃの長さより長く形成されている。この円筒部２０Ａの基部側には指当部２０Ｂが設けられている。この指当部２０Ｂの形状は特に限定するものではなく、また省略してもよい。
【０００９】
次に上記ガイド部材１０と硬質挿入部材２０とから成る前記拡径・保持装置を使用して、筒状部材３０を拡径する方法について説明する。まず、図３に示すように、ガイド部材１０の縮径部１０Ｃに筒状部材３０を挿入する。筒状部材３０はシリコーンゴム等で作られており、この内径は縮径部１０Ｃの外径より小さくなっている。したがって縮径部１０Ｃに筒状部材３０を挿入すると、縮径部１０Ｃは縮径された状態となる。なお、筒状部材３０としては、例えば長さ４００ｍｍ、内径１０ｍｍ、肉厚１０ｍｍ程度のシリコーンゴム製のものである。
【００１０】
次に、図４に示すように、硬質挿入部材２０の先端部にプラスチック等で作られたテーパ部材４０を装着固定する。このテーパ部材４０は省略し、例えば硬質挿入部材２０の先端部をテーパ状としてもよい。
【００１１】
次に、テーパ部材４０を装着した硬質挿入部材２０を、ガイド部材１０の基部１０Ａ側から挿入する。すると図５に示すようにテーパ部材４０が、ガイド部材１０の縮径部１０Ｃの内面を滑り、縮径部１０Ｃを拡径しながら挿入される。これによって縮径部１０Ｃの外周に配置されている筒状部材３０も拡径される。図６に示すように、筒状部材３０の全てが拡径されることによって拡径作業は終了する。なお、テーパ部材４０が、ガイド部材１０の縮径部１０Ｃの内面を滑り易くするために、テーパ部材４０と縮径部１０Ｃの内面との間に潤滑材を塗布等しておくことが好ましい。
【００１２】
上記拡径作業は例えば工場内で行われる。また、筒状部材３０を拡径した後は、図７に示すようにテーパ部材４０を取り外す。筒状部材３０は図７に示した状態、すなわち拡径状態に保持されたままで保管され、この状態で現場に運び込まれる。
【００１３】
次に上記ガイド部材１０と硬質挿入部材２０とから成る拡径・保持装置によって上記のように拡径状態に保持された筒状部材３０を、例えば電力ケーブルの端末部に取り付けるために使用する本発明の縮径方法を説明する。まず硬質挿入部材２０の内面に電力ケーブルの端末部を挿入し、筒状部材３０を電力ケーブル外周の所定位置に位置させる。次に図８に示すように、硬質挿入部材２０及びガイド部材１０を順次少しずつ抜き取り、前記所定位置に縮径させる。このように硬質挿入部材２０及びガイド部材１０を順次少しずつ抜き取ると、筒状部材３０の自己収縮力によってガイド部材１０が押し出されるので、ガイド部材１０の抜き取りを容易に行うことができる。なお、ガイド部材１０の縮径部１０Ｃの外面に潤滑材を塗布等しておくと、ガイド部材１０の引き抜きを更に容易に行うことができる。硬質挿入部材２０及びガイド部材１０が全て抜き取られると、筒状部材３０は拡径状態が解除され自己収縮力によって縮径し、電力ケーブル３の端末部の前記所定位置に密着固定する。
【００１４】
ガイド部材１０の縮径部１０Ｃがどの程度縮径するかは、縮径部１０Ｃの弾性力や筒状部材３０の収縮力によって異なる。例えば、ガイド部材１０の縮径部１０Ｃの弾性力が筒状部材３０の収縮力より著しく弱い場合は、硬質挿入部材２０を一気に全部引き抜くと、図９に示すように、筒状部材３０の収縮力によって縮径部１０Ｃが強く締め付けられることになる。しかしながら、縮径部１０Ｃにはスリットが設けられており、筒状部材３０内面との接触面積が少ないため、この場合においてもガイド部材１０の引き抜きは容易である。なお更にガイド部材１０を引き抜き易くするためには、上記のようにガイド部材１０の縮径部１０Ｃの外面に潤滑材を塗布等しておくことが好ましいものである。
【００１５】
図１０（イ）（ロ）は筒状部材３０の拡径・保持装置で使用するガイド部材１０の他の実施形態を示したもので、図１に示したものに比して、縮径部１０Ｃの幅を薄くしたものである。このガイド部材１０は、縮径部１０Ｃの弾性力が弱いので、内径の小さい筒状部材３０をその外周に位置させて拡径する際に使用することができる。
【００１６】
図１１は筒状部材３０の拡径・保持装置で使用するガイド部材１０の更に他の実施形態を示したもので、ガイド部材１０を適度の鋼性を有する針金状の金属で円筒状に形成したものである。
【００１７】
【発明の効果】
以上のように本発明に係る常温収縮型の筒状部材の縮径方法は、縮径部を有する円筒状のガイド部材と、該ガイド部材の内径より若干小さい外径を有し前記ガイド部材に挿入されている円筒状の硬質挿入部材とから成る常温収縮型の筒状部材の拡径・保持装置によって拡径・保持した常温収縮型の筒状部材をケーブルの外周の所定位置に位置させた後、硬質挿入部材とガイド部材を抜き取ることによって前記常温収縮型の筒状部材を前記所定位置に縮径させることを特徴とする方法である。したがって本発明によれば簡単に常温収縮型の筒状部材を縮径することができる。
【図面の簡単な説明】
【図１】 筒状部材の拡径・保持装置で使用するガイド部材を示すもので（イ）は正面図、（ロ）は側面図。
【図２】 筒状部材の拡径・保持装置で使用する硬質挿入部材を示すもので（イ）は正面図、（ロ）は側面図。
【図３】 ガイド部材の外周に筒状部材を装着した状態の説明図。
【図４】 硬質挿入部材にテーパ部材を取り付ける状態の説明図。
【図５】 筒状部材を拡径する状態の説明図。
【図６】 筒状部材を拡径した状態の説明図。
【図７】 筒状部材を拡径状態で保持した説明図。
【図８】 硬質挿入部材とガイド部材とを抜き取る状態の説明図。
【図９】 硬質挿入部材を全部抜き取った状態の説明図。
【図１０】 ガイド部材の他の実施形態を示すもので、（イ）は正面図、（ロ）は側面図。
【図１１】 ガイド部材の更に他の実施形態を示す説明図。
【図１２】 従来の筒状部材の拡径装置の説明図。
【符号の説明】
１０ ガイド部材
１０Ｃ 縮径部
２０ 硬質挿入部材
３０ 筒状部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for reducing the diameter of a normal temperature shrinkable tubular member used for terminal treatment or connection treatment of a cable such as a crosslinked polyethylene insulated vinyl sheath cable (CV cable) or a rubber sheath cable.
[0002]
[Prior art]
In recent years, cold shrink products are being used for cable terminal processing and connection processing. As shown in FIG. 12, this cold-shrinkable product is obtained by expanding and supporting the cold-shrinkable cylindrical member 1 made of silicone rubber or the like with a diameter-enlarged support 2. The enlarged diameter support 2 is a plastic ribbon wound in a spiral cylindrical shape, and the cylindrical member 1 is arranged on the outer periphery of the enlarged diameter support 2 to hold the cylindrical member 1 in an expanded state. To do. The cylindrical member 1 is expanded in diameter to several times the outer diameter of the portion where the cylindrical member 1 is attached, and is held in this state.
[0003]
When the diameter of the tubular member 1 is reduced, the diameter-enlarged support 2 held in the expanded state is inserted into, for example, the outer periphery of the terminal portion of the cable 3, and then the diameter-expanded support 2 is , By removing by pulling out from one end side. Since the expanded diameter support 2 is a plastic ribbon wound in a spiral cylindrical shape, it can be sequentially disassembled by pulling it out from one end thereof. As a result, the tubular member 1 contracts and is tightly fixed to the outer periphery of the cable.
[0004]
[Problems to be solved by the invention]
However, according to the conventional method for reducing the diameter of the cylindrical member 1, since the diameter-enlarged support 2 is a plastic ribbon wound in a spiral cylinder, the diameter-enlarged support is obtained by pulling out the ribbon from one end side thereof. When the body 2 is sequentially disassembled, the pulled ribbon pieces must be pulled out in the direction of unwinding the spiral so that the ribbon pieces do not get entangled with the cable, and there is a problem that the work is very troublesome.
[0005]
[Means for Solving the Problems]
The present invention provides a method for reducing the diameter of a cylindrical member that has solved the above-described problems.
[0006]
Reduced radial direction method of cold shrinkable type of tubular member according to the present invention is inserted into the guide member possess a cylindrical guide member, the outer diameter slightly smaller than the inner diameter of the guide member having a reduced diameter portion by inserting the end of the cable to the hard insert of cold shrinkable type cylindrical inner member which is expanded and held by the cold shrinkable type tubular member diameter-holding device consisting of a cylindrical rigid insert member After the cold-shrinkable cylindrical member is positioned at a predetermined position on the outer periphery of the cable, the cold-shrinkable cylindrical member is reduced in diameter to the predetermined position by removing the hard insertion member and the guide member. It is a characteristic method.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1A and 1B are a front view and a side view of a guide member 10 used in a diameter expansion / holding device 30 of a cold-shrinkable tubular member (hereinafter simply referred to as a tubular member) 30. The guide member 10 is provided with a plurality of slits 10B with the base 10A left in the longitudinal direction of a cylindrical body formed of plastic or the like, and a predetermined length portion where the slits 10B are provided is a reduced diameter portion 10C. It is. Reference numeral 10D denotes a finger holder provided on the base 10A side. The shape of the finger holder 10D is not particularly limited and may be omitted.
[0008]
FIGS. 2A and 2B are a front view and a side view of the rigid insertion member 20 used in the diameter expanding / holding device of the cylindrical member 30. FIG. The hard insertion member 20 is a cylindrical member formed of plastic or the like, and the outer diameter of the cylindrical portion 20 </ b> A is slightly smaller than the inner diameter of the guide member 10. Further, the length of the cylindrical portion 20 </ b> A is longer than the length of the reduced diameter portion 10 </ b> C of the guide member 10. A finger holding portion 20B is provided on the base side of the cylindrical portion 20A. The shape of the finger holder 20B is not particularly limited and may be omitted.
[0009]
Next, a method for expanding the diameter of the cylindrical member 30 using the diameter expansion / holding device including the guide member 10 and the hard insertion member 20 will be described. First, as shown in FIG. 3, the cylindrical member 30 is inserted into the reduced diameter portion 10 </ b> C of the guide member 10. The cylindrical member 30 is made of silicone rubber or the like, and the inner diameter thereof is smaller than the outer diameter of the reduced diameter portion 10C. Therefore, when the cylindrical member 30 is inserted into the reduced diameter portion 10C, the reduced diameter portion 10C is in a reduced diameter state. The cylindrical member 30 is made of silicone rubber having a length of 400 mm, an inner diameter of 10 mm, and a thickness of about 10 mm, for example.
[0010]
Next, as shown in FIG. 4, a taper member 40 made of plastic or the like is attached and fixed to the distal end portion of the hard insertion member 20. The tapered member 40 is omitted, and for example, the distal end portion of the hard insertion member 20 may be tapered.
[0011]
Next, the hard insertion member 20 equipped with the taper member 40 is inserted from the base portion 10 </ b> A side of the guide member 10. Then, as shown in FIG. 5, the taper member 40 is inserted while sliding the inner surface of the reduced diameter portion 10C of the guide member 10 and increasing the diameter of the reduced diameter portion 10C. Accordingly, the diameter of the cylindrical member 30 disposed on the outer periphery of the reduced diameter portion 10C is also increased. As shown in FIG. 6, the diameter expansion work is completed when all of the cylindrical member 30 is expanded in diameter. In order to make the tapered member 40 slip easily on the inner surface of the reduced diameter portion 10C of the guide member 10, it is preferable to apply a lubricant between the tapered member 40 and the inner surface of the reduced diameter portion 10C.
[0012]
The diameter expansion work is performed in a factory, for example. Moreover, after expanding the diameter of the cylindrical member 30, the taper member 40 is removed as shown in FIG. The cylindrical member 30 is stored while being held in the state shown in FIG. 7, that is, in an expanded state, and is carried to the site in this state.
[0013]
Next, a book used to attach the cylindrical member 30 held in the diameter-expanded state as described above by the diameter-expanding / holding device including the guide member 10 and the hard insertion member 20, for example, to the terminal portion of the power cable. The diameter reducing method of the invention will be described. First, the end portion of the power cable is inserted into the inner surface of the hard insertion member 20, and the cylindrical member 30 is positioned at a predetermined position on the outer periphery of the power cable. Next, as shown in FIG. 8, the hard insertion member 20 and the guide member 10 are withdrawn little by little, and the diameter is reduced to the predetermined position. Thus, when the hard insertion member 20 and the guide member 10 are sequentially extracted little by little, the guide member 10 is pushed out by the self-shrinking force of the cylindrical member 30, so that the guide member 10 can be easily extracted. If a lubricant is applied to the outer surface of the reduced diameter portion 10C of the guide member 10, the guide member 10 can be pulled out more easily. When the hard insertion member 20 and the guide member 10 are all extracted, the diameter of the cylindrical member 30 is released and the diameter of the cylindrical member 30 is reduced by the self-shrinkage force, and the cylindrical member 30 is closely fixed to the predetermined position of the terminal portion of the power cable 3 .
[0014]
How much the diameter reducing portion 10 </ b> C of the guide member 10 is reduced depends on the elastic force of the diameter reducing portion 10 </ b> C and the contraction force of the tubular member 30. For example, when the elastic force of the reduced diameter portion 10C of the guide member 10 is significantly weaker than the contraction force of the cylindrical member 30, when the hard insertion member 20 is pulled out all at once, as shown in FIG. The reduced diameter portion 10C is strongly tightened by the force. However, since the slit portion is provided in the reduced diameter portion 10C and the contact area with the inner surface of the cylindrical member 30 is small, the guide member 10 can be easily pulled out even in this case. In order to make the guide member 10 easier to pull out, it is preferable to apply a lubricant to the outer surface of the reduced diameter portion 10C of the guide member 10 as described above.
[0015]
FIGS. 10 (a) and 10 (b) show another embodiment of the guide member 10 used in the diameter-expanding / holding device for the cylindrical member 30. The diameter-reduced portion is smaller than that shown in FIG. The width of 10C is reduced. Since the guide member 10 has a weak elastic force of the reduced diameter portion 10C, the guide member 10 can be used when the cylindrical member 30 having a small inner diameter is positioned on the outer periphery to expand the diameter.
[0016]
FIG. 11 shows still another embodiment of the guide member 10 used in the apparatus for expanding and holding the cylindrical member 30. The guide member 10 is formed in a cylindrical shape with a wire-like metal having appropriate steel properties. It is a thing.
[0017]
【The invention's effect】
As described above, the method for reducing the diameter of a normal temperature shrinkable cylindrical member according to the present invention includes a cylindrical guide member having a reduced diameter portion and an outer diameter slightly smaller than the inner diameter of the guide member. The cold-shrinkable cylindrical member expanded and held by the cold-shrinkable cylindrical member diameter-expanding / holding device composed of the inserted cylindrical hard insertion member is positioned at a predetermined position on the outer periphery of the cable. Thereafter, the cold insertion type cylindrical member is reduced in diameter to the predetermined position by extracting the hard insertion member and the guide member. Therefore, according to the present invention, the diameter of the cold-shrinkable cylindrical member can be easily reduced.
[Brief description of the drawings]
FIG. 1 shows a guide member used in a cylindrical member diameter-expansion / holding device, in which (A) is a front view and (B) is a side view.
FIGS. 2A and 2B are front views and FIGS. 2B and 2B are side views of a hard insertion member used in a cylindrical member diameter expansion / holding device. FIGS.
FIG. 3 is an explanatory diagram of a state in which a cylindrical member is mounted on the outer periphery of the guide member.
FIG. 4 is an explanatory diagram of a state in which a taper member is attached to a hard insertion member.
FIG. 5 is an explanatory view showing a state in which a cylindrical member is expanded in diameter.
FIG. 6 is an explanatory diagram showing a state in which a cylindrical member is expanded in diameter.
FIG. 7 is an explanatory view showing a cylindrical member held in an expanded state.
FIG. 8 is an explanatory view showing a state where a hard insertion member and a guide member are removed.
FIG. 9 is an explanatory view showing a state in which all the hard insertion members are extracted.
10A and 10B show another embodiment of the guide member, where FIG. 10A is a front view and FIG. 10B is a side view.
FIG. 11 is an explanatory view showing still another embodiment of the guide member.
FIG. 12 is an explanatory view of a conventional cylindrical member diameter expanding apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Guide member 10C Reduced diameter part 20 Hard insertion member 30 Tubular member

Claims (1)

縮径部を有する円筒状のガイド部材と、該ガイド部材の内径より若干小さい外径を有し前記ガイド部材に挿入されている円筒状の硬質挿入部材とから成る常温収縮型の筒状部材の拡径・保持装置によって拡径・保持した常温収縮型の筒状部材内の前記硬質挿入部材にケーブルの端部を挿入して、前記常温収縮型の筒状部材をケーブルの外周の所定位置に位置させた後、硬質挿入部材とガイド部材を抜き取ることによって前記常温収縮型の筒状部材を前記所定位置に縮径させることを特徴とする常温収縮型の筒状部材の縮径方法。A cylindrical guide member having a reduced diameter portion, the guide have a slightly smaller outer diameter than the inner diameter of member the guide cylindrical which is inserted into member cold shrink type comprising a rigid insertion member of the tubular member expanded retention device by inserting the end of the cable to the hard insert of expanded-retained cold shrinkable type cylindrical inner member by the cold shrinkable type of the cylindrical member at a predetermined position on the outer circumference of the cable A method for reducing the diameter of a cold-shrinkable cylindrical member, wherein after the positioning, the cold- insertion- type tubular member is pulled down to the predetermined position by extracting the hard insertion member and the guide member.
JP01775699A 1999-01-27 1999-01-27 Method of reducing the diameter of a normal temperature shrinkable cylindrical member Expired - Fee Related JP3824799B2 (en)

Priority Applications (1)

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JP01775699A JP3824799B2 (en) 1999-01-27 1999-01-27 Method of reducing the diameter of a normal temperature shrinkable cylindrical member

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Application Number Priority Date Filing Date Title
JP01775699A JP3824799B2 (en) 1999-01-27 1999-01-27 Method of reducing the diameter of a normal temperature shrinkable cylindrical member

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JP3824799B2 true JP3824799B2 (en) 2006-09-20

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JP5832639B2 (en) 2011-05-20 2015-12-16 スリーエム イノベイティブ プロパティズ カンパニー Device and method for area expansion

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