JP2007250483A - Cable conductor connecting method, connection part and conductor connecting sleeve - Google Patents

Cable conductor connecting method, connection part and conductor connecting sleeve Download PDF

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JP2007250483A
JP2007250483A JP2006075855A JP2006075855A JP2007250483A JP 2007250483 A JP2007250483 A JP 2007250483A JP 2006075855 A JP2006075855 A JP 2006075855A JP 2006075855 A JP2006075855 A JP 2006075855A JP 2007250483 A JP2007250483 A JP 2007250483A
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screw
cable conductor
conductor
sleeve
male
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JP4652997B2 (en
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Koichi Ono
光一 大野
Nobuyuki Shinagawa
展行 品川
Yukihiro Yagi
幸弘 八木
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Furukawa Electric Co Ltd
Fujikura Ltd
Viscas Corp
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Furukawa Electric Co Ltd
Fujikura Ltd
Viscas Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable conductor connecting method which does not need a compressor. <P>SOLUTION: A conductor connecting sleeve 2 has two sets of four tapped-holes formed with a space in the axial direction of the sleeve, in which the four screw holes of each set are formed around the sleeve at equal angular intervals. A cable conductor 1 is inserted into the conductor connecting sleeve 2 and then a male screw screwed in each screw hole is tightened in the following order. In one set of the screw holes, a first male screw 3a is tightened to push the cable conductor 1 against an inside peripheral surface of the sleeve on the side opposite to the male screw 3a, second and third male screws 3b and 3c positioned on both sides of the first male screw 3a are tightened, and finally a fourth male screw 3d is tightened. In the other set of the screw holes, a fifth screw 3e positioned in the vicinity of the opposite side to the first male screw 3a is tightened to push the cable conductor 1 against the inside peripheral surface of the sleeve on the side opposite to the male screw 3e, sixth and seventh male screws 3f and 3g positioned on both sides of the fifth male screw 3e are tightened, and finally an eighth male screw 3h is tightened. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、電力ケーブルの導体を接続する方法及び導体の接続部と、それに用いる導体接続スリーブに関するものである。   The present invention relates to a method for connecting conductors of a power cable, a conductor connecting portion, and a conductor connecting sleeve used therefor.

電力ケーブルの導体の接続は一般に、導体接続スリーブにケーブル導体を挿入した後、導体接続スリーブを断面六角形、円形又はそれらを組み合わせた形に圧縮することにより行われている。電力ケーブルの接続作業は通常、マンホール内などで行われるが、導体接続スリーブを断面六角形に圧縮するためには大型の圧縮機が必要であり、狭いマンホール内に圧縮機を持ち込んでの接続作業は困難であり、接続作業に時間がかかるという問題がある。   The connection of the conductor of the power cable is generally performed by inserting the cable conductor into the conductor connection sleeve and then compressing the conductor connection sleeve into a hexagonal cross section, a circular shape, or a combination thereof. The connection work of the power cable is usually performed in a manhole, etc., but a large compressor is required to compress the conductor connection sleeve into a hexagonal cross section, and the connection work is done by bringing the compressor into a narrow manhole. Is difficult and takes time to connect.

このため、圧縮機を小型化できるケーブル導体接続方法として、導体接続スリーブの両側からピンを圧入して、導体接続スリーブの一部をケーブル導体にくい込ませることで、ケーブル導体を接続する方法も提案されている（特許文献１）。   For this reason, as a cable conductor connection method that can reduce the size of the compressor, a method of connecting the cable conductor by press-fitting a pin from both sides of the conductor connection sleeve and inserting a part of the conductor connection sleeve into the cable conductor is also proposed. (Patent Document 1).

特開平４−２９４０８１号公報JP-A-4-294081

しかし、ピン圧入方式によるケーブル導体接続方法も、小型であるとはいえ圧縮機を必要とするため、狭いマンホール内では接続作業がやりにくいという問題は残る。また圧縮機は油圧ポンプ等を必要とするため、作業機材コストが高くなるという問題もある。   However, the cable conductor connection method by the pin press-fitting method also requires a compressor even though it is small, so that there remains a problem that it is difficult to perform the connection work in a narrow manhole. In addition, since the compressor requires a hydraulic pump or the like, there is a problem that the cost of work equipment becomes high.

本発明の目的は、上記のような問題点に鑑み、圧縮機を必要としないケーブル導体接続方法及びケーブル導体接続部並びに導体接続スリーブを提供することにある。   In view of the above problems, an object of the present invention is to provide a cable conductor connection method, a cable conductor connection portion, and a conductor connection sleeve that do not require a compressor.

本発明に係るケーブル導体接続方法は、ケーブル導体を挿入する区間内に、周方向に略等角度間隔で形成した４個１組のねじ穴を軸線方向に間隔をあけて複数組形成した導体接続スリーブを使用し、この導体接続スリーブにケーブル導体を挿入した後、前記複数組のねじ穴にそれぞれ雄ねじをねじ込んで導体接続スリーブを導体接続スリーブ内に固定する際に、ケーブル導体がスリーブ内周面に押し付けられる周方向の位置を各組ごとに異ならせることを特徴とするものである。   The cable conductor connection method according to the present invention is a conductor connection in which a set of four screw holes formed at substantially equal angular intervals in the circumferential direction is formed in a section in which a cable conductor is inserted at intervals in the axial direction. After using the sleeve and inserting the cable conductor into the conductor connection sleeve, when the male screw is screwed into the plurality of sets of screw holes to fix the conductor connection sleeve in the conductor connection sleeve, the cable conductor is connected to the inner peripheral surface of the sleeve. The position in the circumferential direction that is pressed against is different for each group.

また本発明に係るケーブル導体接続方法は、好ましくは、
ケーブル導体を挿入する区間内に、周方向に略等角度間隔で形成した４個のねじ穴を１組として、軸線方向に間隔をあけて２組のねじ穴を形成した導体接続スリーブを使用し、この導体接続スリーブにケーブル導体を挿入した後、
一方のねじ穴の組では、まず一つのねじ穴にねじ込まれた第一の雄ねじを締め込んでケーブル導体をその雄ねじと反対側のスリーブ内周面に押し付け、次に前記一つのねじ穴の両側に位置するねじ穴にねじ込まれた第二、第三の雄ねじを締め込み、最後に残る１つのねじ穴にねじ込こまれた第四の雄ねじを締め込んで、その位置にケーブル導体を固定し、
他方のねじ穴の組では、前記一方のねじ穴の組で最初に締め込みを行ったねじ穴と反対側又はその近くに位置する一つのねじ穴にねじ込まれた第五の雄ねじを締め込んでケーブル導体をその雄ねじと反対側のスリーブ内周面に押し付け、次に前記一つのねじ穴の両側に位置するねじ穴にねじ込まれた第六、第七の雄ねじを締め込み、最後に残る１つのねじ穴にねじ込まれた第八の雄ねじを締め込んで、その位置にケーブル導体を固定する、
ことを特徴とするものである。 The cable conductor connecting method according to the present invention is preferably,
In the section where the cable conductor is inserted, a conductor connection sleeve is used, in which four screw holes formed at substantially equal angular intervals in the circumferential direction are set as one set, and two sets of screw holes are formed at intervals in the axial direction. After inserting the cable conductor into this conductor connection sleeve,
In one set of screw holes, first the first male screw screwed into one screw hole is tightened and the cable conductor is pressed against the sleeve inner peripheral surface opposite to the male screw, and then both sides of the one screw hole are Tighten the second and third male screws screwed into the screw holes located at, and tighten the fourth male screw screwed into the last remaining screw hole to fix the cable conductor in that position. ,
In the other set of screw holes, a fifth male screw screwed into one screw hole located on the opposite side or near the screw hole that was first tightened in the one set of screw holes is tightened. The cable conductor is pressed against the inner peripheral surface of the sleeve opposite to the male screw, then the sixth and seventh male screws screwed into the screw holes located on both sides of the one screw hole are tightened, and the remaining one Tighten the eighth male screw screwed into the screw hole to fix the cable conductor in that position,
It is characterized by this.

本発明においては、導体接続スリーブとして、各ねじ穴に予め雄ねじがスリーブ内周面に突出しないようにねじ込まれたもの使用することが、接続作業性を向上させる上で好ましい。   In the present invention, it is preferable to use a conductor connecting sleeve in which a male screw is screwed in advance so that it does not protrude into the inner peripheral surface of the sleeve in each screw hole.

また本発明に係るケーブル導体接続部は、
第一のケーブル導体及び前記第一のケーブル導体と接続される第二のケーブル導体と、
前記第一のケーブル導体が挿入される第一の区間と前記第二のケーブル導体が挿入される第二の区間とを有し、前記第一の区間内に、周方向に略等角度間隔で形成した４個１組のねじ穴が軸線方向に間隔をあけて２組形成され、前記第二の区間内に、周方向に略等角度間隔で形成した４個１組のねじ穴が軸線方向に間隔をあけて２組形成された導体接続スリーブと、
前記第一の区間内の２組のねじ孔にねじ込まれる２組の雄ねじ及び前記第二の区間内の２組のねじ孔にねじ込まれる２組の雄ねじとを備え、
前記導体接続スリーブの第一及び第二の各区間内に挿入された前記第一及び第二の各ケーブル導体が、前記ねじ穴にねじ込まれた前記雄ねじにより、前記導体接続スリーブの内周面に押し付けられて前記導体接続スリーブ内に固定されており、
前記導体接続スリーブの第一の区間内に固定されたケーブル導体が押し付けられる周方向の位置は各組ごとに異なっており、
前記導体接続スリーブの第二の区間内に固定されたケーブル導体が押し付けられる周方向の位置も各組ごとに異なっている、ことを特徴とするものである。 Moreover, the cable conductor connecting portion according to the present invention is:
A first cable conductor and a second cable conductor connected to the first cable conductor;
The first section into which the first cable conductor is inserted and the second section into which the second cable conductor is inserted, and in the first section, at substantially equal angular intervals in the circumferential direction. Two sets of four screw holes formed are formed at intervals in the axial direction, and one set of four screw holes formed at substantially equal angular intervals in the circumferential direction are axially arranged in the second section. Two conductor connection sleeves formed at intervals,
Two sets of male screws to be screwed into two sets of screw holes in the first section, and two sets of male screws to be screwed into two sets of screw holes in the second section,
The first and second cable conductors inserted into the first and second sections of the conductor connection sleeve are brought into contact with the inner peripheral surface of the conductor connection sleeve by the male screw screwed into the screw hole. Pressed and fixed in the conductor connection sleeve,
The circumferential position where the cable conductor fixed in the first section of the conductor connection sleeve is pressed is different for each set,
The circumferential position at which the cable conductor fixed in the second section of the conductor connection sleeve is pressed is also different for each group.

また本発明に係る導体接続スリーブは、
一方のケーブル導体が挿入される第一の区間内に、周方向に略等角度間隔で形成した４個１組のねじ穴が軸線方向に間隔をあけて２組形成され、
前記一方のケーブル導体と接続される他方のケーブル導体が挿入される第二の区間内に、周方向に略等角度間隔で形成した４個１組のねじ穴が軸線方向に間隔をあけて２組形成されている、ことを特徴とするものである。 The conductor connection sleeve according to the present invention is
In the first section in which one cable conductor is inserted, two sets of four screw holes formed at substantially equal angular intervals in the circumferential direction are formed at intervals in the axial direction.
In a second section where the other cable conductor connected to the one cable conductor is inserted, a set of four screw holes formed at substantially equal angular intervals in the circumferential direction is spaced apart in the axial direction. It is characterized by being formed into a pair.

本発明の接続方法は、導体接続スリーブのねじ穴にねじ込んだ雄ねじを締め込むことにより、ケーブル導体を接続するものであるので、圧縮機を必要とせず、ねじ締め用のトルクレンチ等を用いて簡単に導体接続作業を行うことができる。また、導体接続スリーブの導体挿入区間内に４個１組のねじ穴を複数組設け、隣り合う組のねじ穴で雄ねじを締め込む順序を反対にすることにより、複数組のねじ穴の位置で、四方から雄ねじで締め付けられた導体が交互に反対側へ偏心させられた状態（スリーブ内で導体が屈曲した状態）となるため、大きな導体引抜き抵抗を得ることができる。   Since the connection method of the present invention is to connect the cable conductor by tightening the male screw screwed into the screw hole of the conductor connection sleeve, a compressor is not required, and a screw wrench torque wrench or the like is used. Conductor connection work can be easily performed. Further, by providing a plurality of sets of four screw holes in the conductor insertion section of the conductor connection sleeve and reversing the order in which the male screws are tightened in adjacent screw holes, the positions of the plurality of sets of screw holes are Since the conductors clamped from the four sides with the male screw are alternately eccentric to the opposite side (the conductor is bent in the sleeve), a large conductor pulling resistance can be obtained.

〔実施形態１〕図１は本発明に係るケーブル導体接続方法の一実施形態を示す。図において、１は接続すべきケーブル導体、２は導体接続スリーブ、３は雄ねじである。   [Embodiment 1] FIG. 1 shows an embodiment of a cable conductor connecting method according to the present invention. In the figure, 1 is a cable conductor to be connected, 2 is a conductor connection sleeve, and 3 is a male screw.

導体接続スリーブ２には、図２に示すように、両端から導体挿入孔４が形成され、軸線方向中央部には隔壁５が形成されている。この導体接続スリーブ２にはさらに、ケーブル導体を挿入する区間Ｓ内に、４個１組のねじ穴６が軸線方向に間隔をあけて２組形成されている。各組の４個のねじ穴６は周方向に略等角度間隔で形成されている。この実施形態では、一方のねじ穴の組と他方のねじ穴の組が軸線方向に重ならないように周方向にずらして（図示の例では45°ずらして）形成されている。導体接続スリーブ２の材質は黄銅又は硬銅である。   As shown in FIG. 2, the conductor connection sleeve 2 is formed with conductor insertion holes 4 from both ends, and a partition wall 5 is formed at the center in the axial direction. The conductor connection sleeve 2 is further formed with two sets of four screw holes 6 at intervals in the axial direction in the section S into which the cable conductor is inserted. The four screw holes 6 in each group are formed at substantially equal angular intervals in the circumferential direction. In this embodiment, one set of screw holes and the other set of screw holes are shifted in the circumferential direction so as not to overlap in the axial direction (shifted by 45 ° in the example shown). The material of the conductor connection sleeve 2 is brass or hard copper.

導体接続スリーブ２の各ねじ穴６には、図１に示すように、雄ねじ３がねじ込まれる。雄ねじ３としては、図３（Ａ）に示すような先端面が平らな「平坦ねじ」、（Ｂ）に示すような先端面に凹み７を有する「凹みねじ」、（Ｃ）に示すような先端が尖った「尖りねじ」等を使用することができる。雄ねじ３の後端面には、ねじ締め工具が嵌合する六角凹部８（マイナス溝又はプラス溝でも可）が形成されている。雄ねじ３の材質も黄銅又は硬銅である。   As shown in FIG. 1, a male screw 3 is screwed into each screw hole 6 of the conductor connection sleeve 2. As the male screw 3, a “flat screw” having a flat tip surface as shown in FIG. 3A, a “dent screw” having a dent 7 on the tip surface as shown in FIG. A “sharp screw” or the like having a sharp tip can be used. A hexagonal recess 8 (which may be a minus groove or a plus groove) into which a screw tightening tool is fitted is formed on the rear end surface of the male screw 3. The material of the male screw 3 is also brass or hard copper.

雄ねじ３は、導体接続スリーブ２にケーブル導体１を挿入する前に予めねじ込んでおいてもよいし、ケーブル導体１を挿入した後にねじ込んでもよいが、予めねじ込んでおいた方が作業がやりやすい。各ねじ穴６に予め雄ねじ３をねじ込んでおく場合は、図１に示すように、導体接続スリーブ２の内周面に雄ねじ３の先端が突出しないようにねじ込んでおく必要がある。これはケーブル導体の挿入に支障が出ないようにするためである。   The male screw 3 may be screwed in advance before inserting the cable conductor 1 into the conductor connection sleeve 2 or may be screwed in after inserting the cable conductor 1, but it is easier to work if screwed in advance. When the male screw 3 is screwed into each screw hole 6 in advance, it is necessary to screw the male screw 3 so that the tip of the male screw 3 does not protrude from the inner peripheral surface of the conductor connection sleeve 2 as shown in FIG. This is in order not to hinder the insertion of the cable conductor.

図１は、各ねじ穴６に予め雄ねじ３をねじ込んだ導体接続スリーブ２に両端からケーブル導体１を挿入した状態を示す。この後、雄ねじ３の締め込みを行う。雄ねじ３の締め込みは次の順序で行う。なお以下の説明では、片側のケーブル導体１をスリーブ２に接続する場合を説明するが、反対側のケーブル導体１をスリーブ２に接続する場合も同様に行えばよい。   FIG. 1 shows a state in which a cable conductor 1 is inserted from both ends into a conductor connection sleeve 2 in which a male screw 3 is screwed into each screw hole 6 in advance. Thereafter, the male screw 3 is tightened. The male screw 3 is tightened in the following order. In the following description, the case where the cable conductor 1 on one side is connected to the sleeve 2 will be described, but the same may be applied to the case where the cable conductor 1 on the opposite side is connected to the sleeve 2.

まず、２組のねじ穴のうちの一方のねじ穴の組（例えばＣ−Ｃ断面の組）で、いずれか一つのねじ穴６（例えばａの位置）にねじ込まれた第一の雄ねじ３ａを締め込んで、ケーブル導体１をその雄ねじ３ａと反対側のスリーブ内周面に押し付ける（図４（Ｃ）参照）。次に前記一つのねじ穴の両側に位置するねじ穴６（ｂ、ｃの位置）にねじ込まれた第二、第三の雄ねじ３ｂ、３ｃを順次締め込む。第二、第三の雄ねじ３ｂ、３ｃの締め込みはどちらを先に行ってもよい。これによりケーブル導体１は三方から押さえ込まれた状態となる。最後に残る１つのねじ穴６（ｄの位置）にねじ込まれた第四の雄ねじ３ｄを締め込む。これによって、ケーブル導体１は２組のねじ穴のうちの一方のねじ穴の組（Ｃ−Ｃ断面の組）で、図４（Ｃ）に示すように、第四の雄ねじ３ｄ側に偏心した状態で強固に固定される。   First, the first male screw 3a screwed into any one screw hole 6 (for example, the position of a) in one of the two sets of screw holes (for example, a set having a CC cross section) The cable conductor 1 is pressed against the inner peripheral surface of the sleeve opposite to the male screw 3a (see FIG. 4C). Next, the second and third male screws 3b and 3c screwed in the screw holes 6 (positions b and c) located on both sides of the one screw hole are sequentially tightened. Either of the second and third male screws 3b and 3c may be tightened first. As a result, the cable conductor 1 is pressed from three directions. Finally, the fourth male screw 3d screwed into the remaining one screw hole 6 (position d) is tightened. As a result, the cable conductor 1 is a set of one of the two screw holes (a set of CC cross sections) and is eccentric to the fourth male screw 3d side as shown in FIG. 4C. It is firmly fixed in the state.

次に、２組のねじ穴のうちの他方のねじ穴の組（Ｂ−Ｂ断面の組）で、前記一方のねじ穴の組で最初に締め込みを行ったねじ穴（ａの位置）と反対側の最も近くに位置する一つのねじ穴６（ｅの位置）にねじ込まれた第五の雄ねじ３ｅを締め込んで、ケーブル導体１をその雄ねじ３ｅと反対側のスリーブ内周面に押し付ける（図４（Ｂ）参照）。次に前記一つのねじ穴の両側に位置するねじ穴６（ｆ、ｇの位置）にねじ込まれた第六、第七の雄ねじ３ｆ、３ｇを締め込む。第六、第七の雄ねじ３ｆ、３ｇの締め込みもどちらを先に行ってもよい。最後に残る１つのねじ穴（ｈの位置）にねじ込まれた第八の雄ねじを締め込む。これによって、ケーブル導体１は他方のねじ穴の組（Ｂ−Ｂ断面の組）で、図４（Ｂ）に示すように、第八の雄ねじ３ｈ側に偏心した状態で強固に固定される。   Next, the screw hole (position a) that was first tightened with the one screw hole set in the other screw hole set (the set of the B-B cross section) of the two sets of screw holes; A fifth male screw 3e screwed into one screw hole 6 (position e) closest to the opposite side is tightened, and the cable conductor 1 is pressed against the sleeve inner peripheral surface opposite to the male screw 3e ( (See FIG. 4B). Next, the sixth and seventh male screws 3f and 3g screwed into the screw holes 6 (positions f and g) located on both sides of the one screw hole are tightened. Either of the sixth and seventh male screws 3f and 3g may be fastened first. The eighth male screw screwed into the last remaining screw hole (position h) is tightened. As a result, the cable conductor 1 is firmly fixed in the state of being eccentric to the eighth male screw 3h side, as shown in FIG.

以上の順序で雄ねじ３の締め込みを行うと、ケーブル導体１はスリーブ２内で、図４（Ａ）に示すように、互いにほぼ反対側へ偏心させられた状態（スリーブ内で導体が屈曲した状態）となるため、導体引抜き力に対し大きな抵抗力を発揮し、強固な接続状態を得ることができる。   When the male screw 3 is tightened in the above order, the cable conductor 1 is eccentric in the sleeve 2 as shown in FIG. 4 (A). Therefore, a large resistance to the conductor pulling force can be exhibited, and a strong connection state can be obtained.

〔比較例１〕図５は本発明の比較例を示す。この接続方法は、実施形態１と同じ導体接続スリーブ２及び雄ねじ３を用い、一方のねじ穴の組（Ｃ−Ｃ断面の組）では実施形態１と同じ順序で雄ねじ３の締め込みを行い、他方のねじ穴の組（Ｂ−Ｂ断面の組）では、ｈ→ｇ→ｆ→ｅの順序で雄ねじ３の締め込みを行った場合である。このような順序で雄ねじ３の締め込みを行うと、図５（Ａ）に示すように、導体接続スリーブ２内でケーブル導体１が実質的に屈曲しないため、大きな導体引抜き抵抗を得ることができない。   Comparative Example 1 FIG. 5 shows a comparative example of the present invention. This connection method uses the same conductor connection sleeve 2 and male screw 3 as in the first embodiment, and tightens the male screw 3 in the same order as in the first embodiment in one set of screw holes (a set of CC cross sections). In the other set of screw holes (set of BB cross section), the male screw 3 is tightened in the order of h → g → f → e. When the male screw 3 is tightened in this order, the cable conductor 1 does not substantially bend in the conductor connection sleeve 2 as shown in FIG. .

表１は、実施形態１の方法で接続した導体接続部と、比較例１の方法で接続した導体接続部の引張り試験（導体引抜け力測定）結果を示す。   Table 1 shows the results of a tensile test (measurement of conductor pull-out force) of the conductor connection portions connected by the method of Embodiment 1 and the conductor connection portions connected by the method of Comparative Example 1.

Figure 2007250483
Figure 2007250483

供試サンプルの諸元は次のとおりである。ケーブル導体：８０mm２、導体接続スリーブの外径：29mm 内径：11mm 長さ：１０８mm 隔壁厚さ：６mm、導体接続スリーブの材質：実施形態１は硬銅・比較例１は黄銅、雄ねじ：１６−Ｍ８黄銅ねじ、ねじ締めトルク：６．３７Ｎ・ｍ。 The specifications of the sample are as follows. Cable conductor: 80 mm 2 , outer diameter of conductor connection sleeve: 29 mm inner diameter: 11 mm length: 108 mm partition wall thickness: 6 mm, material of conductor connection sleeve: Embodiment 1 is hard copper, Comparative Example 1 is brass, male thread: 16- M8 brass screw, screw tightening torque: 6.37 N · m.

表１によれば、雄ねじの種類にかかわらず、実施形態１の方が比較例１よりも導体引抜け力が格段に大きいことが分かる。導体引抜け力の目安は４ｋＮ以上とされているので、実施形態１はいずれもこれを満足する。雄ねじとしては図３（Ｂ）に示す凹みねじを使用することが特に好ましい。   According to Table 1, it can be seen that the conductor pull-out force is much larger in the first embodiment than in the first comparative example, regardless of the type of the male screw. Since the standard of the conductor pull-out force is 4 kN or more, the first embodiment satisfies this. As the male screw, it is particularly preferable to use a recessed screw shown in FIG.

また、実施形態１の方法で接続した導体接続部と、比較例１の方法で接続した導体接続部について直流抵抗の測定を行った。測定では、導体接続部を中央にした長さ１２８mmの区間と、長さ３００mmの区間の抵抗を測定した。その結果、実施形態１及び比較例１とも、同じ長さの８０mm２ケーブル導体の抵抗値（長さ１２８mmで２６．７２μΩ、長さ３００mmで６２．６３μΩ）よりも低い抵抗値を示した。したがって、導体接続抵抗はいずれの接続方法でも問題がないことが分かった。 Moreover, DC resistance was measured about the conductor connection part connected by the method of Embodiment 1, and the conductor connection part connected by the method of the comparative example 1. FIG. In the measurement, the resistance of a section having a length of 128 mm with the conductor connecting portion at the center and a section having a length of 300 mm was measured. As a result, both the embodiment 1 and the comparative example 1 showed a resistance value lower than the resistance value of the 80 mm 2 cable conductor having the same length (length of 128 mm, 26.72 μΩ, length of 300 mm, 62.63 μΩ). Therefore, it was found that there is no problem with the conductor connection resistance in any connection method.

〔実施形態２〕図６は本発明の他の実施形態を示す。この接続方法は、２組のねじ穴６を軸線方向に重なるように（周方向の同じ位置に）設け、雄ねじ３の締め込みを、ａ→ｂ→ｃ→ｄ→ｅ→ｆ→ｇ→ｈの順で行うものである。それ以外は実施形態１と同じであるので、同一部分には同一符号を付して説明を省略する。   [Embodiment 2] FIG. 6 shows another embodiment of the present invention. In this connection method, two sets of screw holes 6 are provided so as to overlap in the axial direction (at the same position in the circumferential direction), and the male screw 3 is tightened by a → b → c → d → e → f → g → h. In order. Since other than that is the same as Embodiment 1, it attaches | subjects the same code | symbol to the same part, and abbreviate | omits description.

このような接続方法でも実施形態１と同様な接続状態を得ることができる。ただし、２組のねじ穴が周方向の同じ位置にあるため、導体接続スリーブの変形強度が実施形態１の場合より低くなると考えられ、長期信頼性の点では実施形態１の方が優れている。   Even with such a connection method, a connection state similar to that of the first embodiment can be obtained. However, since the two sets of screw holes are at the same position in the circumferential direction, it is considered that the deformation strength of the conductor connection sleeve is lower than that in the first embodiment, and the first embodiment is superior in terms of long-term reliability. .

なお、本発明に用いられる導体接続スリーブに設けられるねじ穴は、周方向に略等角度間隔で形成した４個１組のねじ穴が軸線方向に間隔をあけて少なくとも２組形成されていればよく、例えば４個１組としてこれを複数組設けてもよい。また、周方向に略等角度間隔で形成した４個１組のねじ穴が軸線方向に間隔をあけて少なくとも２組形成したものと、これらと軸線方向に位置をずらして、１個、あるいは４個以外の複数個を周方向に形成したものを１組として、これを１組以上設けたものとを組み合わせてもよい。   It should be noted that the screw holes provided in the conductor connection sleeve used in the present invention are formed so that at least two sets of four screw holes formed at substantially equal angular intervals in the circumferential direction are spaced apart in the axial direction. For example, a plurality of sets of four pieces may be provided. Further, one set of four screw holes formed at substantially equal angular intervals in the circumferential direction is formed with at least two sets spaced apart in the axial direction, and one or four with a position shifted in the axial direction. You may combine what formed multiple pieces other than the piece in the circumferential direction as one set, and provided one or more sets.

本発明に係るケーブル導体接続方法の一実施形態を示す、（Ａ）は一部切開側面図、（Ｂ）は（Ａ）のＢ−Ｂ線断面図、（Ｃ）は（Ａ）のＣ−Ｃ線断面図。1 shows an embodiment of a cable conductor connection method according to the present invention, (A) is a partially cutaway side view, (B) is a cross-sectional view taken along line BB of (A), and (C) is C- of (A). C line sectional drawing. 図１の接続方法で使用した導体接続スリーブを示す、（Ａ）は一部切開側面図、（Ｂ）は（Ａ）のＢ−Ｂ線断面図、（Ｃ）は（Ａ）のＣ−Ｃ線断面図。1 shows a conductor connection sleeve used in the connection method of FIG. 1, (A) is a partially cutaway side view, (B) is a sectional view taken along line BB of (A), and (C) is CC of (A). FIG. （Ａ）、（Ｂ）、（Ｃ）はそれぞれ図１の接続方法に使用される雄ねじの断面図。(A), (B), (C) is sectional drawing of the external thread used for the connection method of FIG. 1, respectively. 図１の接続方法で接続した導体接続部の、（Ａ）は縦断面図、（Ｂ）は（Ａ）のＢ−Ｂ線断面図、（Ｃ）は（Ａ）のＣ−Ｃ線断面図。1, (A) is a longitudinal sectional view, (B) is a sectional view taken along line BB in (A), and (C) is a sectional view taken along line CC in (A). . 図１の接続方法とは異なる比較例の方法で接続した導体接続部の、（Ａ）は縦断面図、（Ｂ）は（Ａ）のＢ−Ｂ線断面図、（Ｃ）は（Ａ）のＣ−Ｃ線断面図。1A is a longitudinal sectional view, FIG. 2B is a sectional view taken along the line BB in FIG. 1A, and FIG. CC sectional view taken on the line. 本発明に係るケーブル導体接続方法の他の実施形態を示す、（Ａ）は一部切開側面図、（Ｂ）は（Ａ）のＢ−Ｂ線断面図、（Ｃ）は（Ａ）のＣ−Ｃ線断面図。The other embodiment of the cable conductor connection method which concerns on this invention is shown, (A) is a partially cutaway side view, (B) is BB sectional drawing of (A), (C) is C of (A). -C sectional view.

符号の説明Explanation of symbols

１：ケーブル導体
２：導体接続スリーブ
３、３ａ〜３ｈ：雄ねじ
４：導体挿入孔
５：隔壁
６：ねじ穴
７：凹み
８：六角凹部
Ｓ：導体挿入区間 1: Cable conductor 2: Conductor connection sleeves 3, 3a to 3h: Male screw 4: Conductor insertion hole 5: Bulkhead 6: Screw hole 7: Recess 8: Hexagonal recess S: Conductor insertion section

Claims (5)

ケーブル導体を挿入する区間内に、周方向に略等角度間隔で形成した４個１組のねじ穴を軸線方向に間隔をあけて複数組形成した導体接続スリーブを使用し、この導体接続スリーブにケーブル導体を挿入した後、
前記複数組のねじ穴にそれぞれ雄ねじをねじ込んで導体接続スリーブを導体接続スリーブ内に固定する際に、ケーブル導体がスリーブ内周面に押し付けられる周方向の位置を各組ごとに異ならせることを特徴とするケーブル導体接続方法。 In the section where the cable conductor is inserted, a conductor connection sleeve is used in which a set of four screw holes formed at substantially equal angular intervals in the circumferential direction is formed at intervals in the axial direction. After inserting the cable conductor,
When the male screw is screwed into each of the plurality of sets of screw holes to fix the conductor connection sleeve in the conductor connection sleeve, the circumferential position where the cable conductor is pressed against the inner peripheral surface of the sleeve is varied for each set. Cable conductor connection method. ケーブル導体を挿入する区間内に、周方向に略等角度間隔で形成した４個１組のねじ穴を軸線方向に間隔をあけて２組形成した導体接続スリーブを使用し、この導体接続スリーブにケーブル導体を挿入した後、
一方のねじ穴の組では、まず一つのねじ穴にねじ込まれた第一の雄ねじを締め込んでケーブル導体をその雄ねじと反対側のスリーブ内周面に押し付け、次に前記一つのねじ穴の両側に位置するねじ穴にねじ込まれた第二、第三の雄ねじを締め込み、最後に残る１つのねじ穴にねじ込こまれた第四の雄ねじを締め込んで、その位置にケーブル導体を固定し、
他方のねじ穴の組では、前記一方のねじ穴の組で最初に締め込みを行ったねじ穴と反対側又はその近くに位置する一つのねじ穴にねじ込まれた第五の雄ねじを締め込んでケーブル導体をその雄ねじと反対側のスリーブ内周面に押し付け、次に前記一つのねじ穴の両側に位置するねじ穴にねじ込まれた第六、第七の雄ねじを締め込み、最後に残る１つのねじ穴にねじ込まれた第八の雄ねじを締め込んで、その位置にケーブル導体を固定する、
ことを特徴とするケーブル導体接続方法。 In the section where the cable conductor is inserted, a conductor connection sleeve is used, in which two sets of four screw holes formed at substantially equal angular intervals in the circumferential direction are formed at intervals in the axial direction. After inserting the cable conductor,
In one set of screw holes, first the first male screw screwed into one screw hole is tightened and the cable conductor is pressed against the sleeve inner peripheral surface opposite to the male screw, and then both sides of the one screw hole are Tighten the second and third male screws screwed into the screw holes located at, and tighten the fourth male screw screwed into the last remaining screw hole to fix the cable conductor in that position. ,
In the other set of screw holes, a fifth male screw screwed into one screw hole located on the opposite side or near the screw hole that was first tightened in the one set of screw holes is tightened. The cable conductor is pressed against the inner peripheral surface of the sleeve opposite to the male screw, then the sixth and seventh male screws screwed into the screw holes located on both sides of the one screw hole are tightened, and the remaining one Tighten the eighth male screw screwed into the screw hole to fix the cable conductor in that position,
A cable conductor connection method characterized by that. 導体接続スリーブとして、各ねじ穴に予め雄ねじがスリーブ内周面に突出しないようにねじ込まれたもの使用することを特徴とする請求項１又は２記載のケーブル導体接続方法。   The cable conductor connection method according to claim 1 or 2, wherein the conductor connection sleeve is used in which a male screw is screwed into each screw hole in advance so as not to protrude to the inner peripheral surface of the sleeve. 第一のケーブル導体及び前記第一のケーブル導体と接続される第二のケーブル導体と、
前記第一のケーブル導体が挿入される第一の区間と前記第二のケーブル導体が挿入される第二の区間とを有し、前記第一の区間内に、周方向に略等角度間隔で形成した４個１組のねじ穴が軸線方向に間隔をあけて２組形成され、前記第二の区間内に、周方向に略等角度間隔で形成した４個１組のねじ穴が軸線方向に間隔をあけて２組形成された導体接続スリーブと、
前記第一の区間内の２組のねじ孔にねじ込まれる２組の雄ねじ及び前記第二の区間内の２組のねじ孔にねじ込まれる２組の雄ねじとを備え、
前記導体接続スリーブの第一及び第二の各区間内に挿入された前記第一及び第二の各ケーブル導体が、前記ねじ穴にねじ込まれた前記雄ねじにより、前記導体接続スリーブの内周面に押し付けられて前記導体接続スリーブ内に固定されており、
前記導体接続スリーブの第一の区間内に固定されたケーブル導体が押し付けられる周方向の位置は各組ごとに異なっており、
前記導体接続スリーブの第二の区間内に固定されたケーブル導体が押し付けられる周方向の位置も各組ごとに異なっている、ことを特徴とするケーブル導体接続部。 A first cable conductor and a second cable conductor connected to the first cable conductor;
The first section into which the first cable conductor is inserted and the second section into which the second cable conductor is inserted, and in the first section, at substantially equal angular intervals in the circumferential direction. Two sets of four screw holes formed are formed at intervals in the axial direction, and one set of four screw holes formed at substantially equal angular intervals in the circumferential direction are axially arranged in the second section. Two conductor connection sleeves formed at intervals,
Two sets of male screws to be screwed into two sets of screw holes in the first section, and two sets of male screws to be screwed into two sets of screw holes in the second section,
The first and second cable conductors inserted into the first and second sections of the conductor connection sleeve are brought into contact with the inner peripheral surface of the conductor connection sleeve by the male screw screwed into the screw hole. Pressed and fixed in the conductor connection sleeve,
The circumferential position where the cable conductor fixed in the first section of the conductor connection sleeve is pressed is different for each set,
The cable conductor connecting portion, wherein a circumferential position where the cable conductor fixed in the second section of the conductor connecting sleeve is pressed is different for each set. 一方のケーブル導体が挿入される第一の区間内に、周方向に略等角度間隔で形成した４個１組のねじ穴が軸線方向に間隔をあけて２組形成され、
前記一方のケーブル導体と接続される他方のケーブル導体が挿入される第二の区間内に、周方向に略等角度間隔で形成した４個１組のねじ穴が軸線方向に間隔をあけて２組形成されている、ことを特徴とする導体接続スリーブ。 In the first section in which one cable conductor is inserted, two sets of four screw holes formed at substantially equal angular intervals in the circumferential direction are formed at intervals in the axial direction.
In a second section where the other cable conductor connected to the one cable conductor is inserted, a set of four screw holes formed at substantially equal angular intervals in the circumferential direction is spaced apart in the axial direction. A conductor connection sleeve, characterized in that it is formed as a set.
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KR102469422B1 (en) * 2015-10-08 2022-11-21 엘에스전선 주식회사 Conductor sleeve and cable connector having the same
KR20170042167A (en) * 2015-10-08 2017-04-18 엘에스전선 주식회사 Conductor sleeve and cable connector having the same
WO2019054569A1 (en) * 2017-09-12 2019-03-21 엘에스전선 주식회사 Conductor connection structure of power cable, conductor connection method of power cable, and conductor connection apparatus of power cable

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