JP7431658B2 - Cable connection - Google Patents
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- JP7431658B2 JP7431658B2 JP2020079727A JP2020079727A JP7431658B2 JP 7431658 B2 JP7431658 B2 JP 7431658B2 JP 2020079727 A JP2020079727 A JP 2020079727A JP 2020079727 A JP2020079727 A JP 2020079727A JP 7431658 B2 JP7431658 B2 JP 7431658B2
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- 239000004020 conductor Substances 0.000 claims description 136
- 239000012212 insulator Substances 0.000 claims description 64
- 230000006835 compression Effects 0.000 claims description 20
- 238000007906 compression Methods 0.000 claims description 20
- 238000009413 insulation Methods 0.000 claims description 18
- 238000004873 anchoring Methods 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 description 17
- 230000003014 reinforcing effect Effects 0.000 description 14
- 230000037431 insertion Effects 0.000 description 12
- 238000003780 insertion Methods 0.000 description 12
- 230000002093 peripheral effect Effects 0.000 description 12
- 230000001681 protective effect Effects 0.000 description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 4
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920002379 silicone rubber Polymers 0.000 description 3
- 239000004945 silicone rubber Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- Cable Accessories (AREA)
Description
本発明は、ケーブル接続部に関する。 FIELD OF THE INVENTION The present invention relates to cable connections.
従来、ケーブル接続部として、ガス中終端接続部、油中終端接続部、気中終端接続部などの終端接続部、直線接続部や分岐接続部などの中間接続部が知られている。一般的には、ケーブル接続部では、例えば、ケーブル導体に接続端子が圧縮接続され、本体材料の内部導体と電気的に接続される。 Conventionally, as cable connections, end connections such as a gas end connection, an oil end connection, and an air end connection, and intermediate connections such as a straight connection and a branch connection are known. Generally, at the cable connection part, for example, a connection terminal is compressively connected to the cable conductor and electrically connected to the internal conductor of the main body material.
ところで、ケーブル絶縁体には、製造時に生じた応力が残留しているため、電力ケーブルを切断すると、残留応力が解放されてケーブル絶縁体が収縮する。この現象は、シュリンクバックと呼ばれる。シュリンクバックは、通電によるヒートサイクルによって、さらに増大する。シュリンクバックにより、ケーブル絶縁体が位置変動すると、ケーブルの外部半導電層端部とストレスコーン部（半導電ゴム部）との当接位置がずれ、ずれの程度により絶縁性能に影響が出て、ひいては絶縁破壊に至るおそれがある。そこで、従来のケーブル接続部においては、シュリンクバック対策として、ケーブル絶縁体を機械的に把持することにより、ケーブル絶縁体の位置変動が抑えられている（例えば、特許文献１，２参照）。 By the way, the stress generated during manufacturing remains in the cable insulator, so when the power cable is cut, the residual stress is released and the cable insulator contracts. This phenomenon is called shrinkback. Shrinkback is further increased by heat cycles caused by energization. When the position of the cable insulator changes due to shrinkback, the contact position between the cable's outer semiconducting layer end and the stress cone (semiconducting rubber part) shifts, and depending on the degree of shift, insulation performance is affected. This may eventually lead to dielectric breakdown. Therefore, in conventional cable connection sections, as a measure against shrinkback, the positional fluctuation of the cable insulator is suppressed by mechanically gripping the cable insulator (see, for example, Patent Documents 1 and 2).
特許文献１には、電力ケーブルのケーブル導体の先端に接続された雄端子とケーブル絶縁体とを、引留治具によって連結することが開示されている。具体的には、雄端子とケーブル絶縁体に切欠溝を形成しておき、この切欠溝に引留治具の両端に設けられた内周突起を嵌め込むことにより、雄端子とケーブル絶縁体が連結されている。 Patent Document 1 discloses that a male terminal connected to the tip of a cable conductor of a power cable and a cable insulator are connected using a retaining jig. Specifically, a notch groove is formed in the male terminal and the cable insulator, and the male terminal and the cable insulator are connected by fitting the inner peripheral protrusions provided at both ends of the retaining jig into the notch groove. has been done.
特許文献２には、ケーブル中間接続部において、接続される２本の電力ケーブルのそれぞれのケーブル絶縁体同士を絶縁層連結部によって連結することが開示されている。具体的には、それぞれのケーブル絶縁体に切欠溝を形成しておき、この切欠溝に絶縁層連結部の両端の突起構造を嵌め込むことにより、ケーブル絶縁体同士が連結されている。 Patent Document 2 discloses that the cable insulators of two power cables to be connected are connected to each other by an insulating layer connection part at a cable intermediate connection part. Specifically, the cable insulators are connected to each other by forming a notch groove in each cable insulator, and fitting the protrusion structures at both ends of the insulating layer connecting portion into the notch groove.
ところで、特許文献１，２に開示の構成は、予めケーブル絶縁体および雄端子、またはケーブル絶縁体同士に形成された切欠溝に引留部材（引留治具、絶縁層連結部）の突起部分を嵌め込む構成であり、引留部材の突起部分と切欠溝の位置を合わせる必要がある。しかしながら、ケーブル導体に雄端子（あるいは導体接続管）を圧縮接続した際のケーブル導体および導体接続部分の圧縮伸びのバラツキによってケーブル絶縁体の先端位置が安定せず、引留部材の寸法に切欠溝の位置を合わせることができず、ひいては引留部材を切欠溝に嵌め込むことができないおそれがあった。 By the way, in the configurations disclosed in Patent Documents 1 and 2, the protruding portion of the retaining member (retaining jig, insulating layer connecting portion) is fitted into a notch groove formed in advance in the cable insulator and the male terminal, or in the cable insulators. The structure is such that the protruding portion of the retaining member and the notch groove need to be aligned. However, when the male terminal (or conductor connecting tube) is compressed and connected to the cable conductor, the position of the tip of the cable insulator is unstable due to variations in the compression and elongation of the cable conductor and the conductor connection part, and the size of the retaining member does not allow for the notch groove. There was a possibility that the position could not be adjusted, and as a result, the retaining member could not be fitted into the notch groove.
本発明の目的は、ケーブル導体および導体接続部の圧縮伸びのバラツキの影響を受けずに引留部材を取り付けることが可能なケーブル接続部を提供することである。 An object of the present invention is to provide a cable connection part to which a restraining member can be attached without being affected by variations in compressive elongation of the cable conductor and the conductor connection part.
本発明に係るケーブル接続部は、
先端側からケーブル導体とケーブル絶縁体とが露出されたケーブル端末部に接続されるケーブル接続部であって、
圧縮接続部にて前記ケーブル導体に圧縮接続される導体接続部と、
前記ケーブル絶縁体と前記導体接続部とを連結して前記導体接続部に対する前記ケーブル絶縁体の移動を規制する引留部と、
を備え、
前記引留部は、
前記導体接続部の前記圧縮接続部より後端側の端部外周から前記ケーブル絶縁体に跨がるように配置され、長手方向における第１端部が前記導体接続部および前記ケーブル絶縁体の何れか一方に係合される引留部材と、
前記引留部材の前記長手方向における第２端部を前記導体接続部の前記端部外周および前記ケーブル絶縁体の何れか他方に引留固定する固定部材と、
を有する。
The cable connection part according to the present invention includes:
A cable connection part in which a cable conductor and a cable insulator are connected to a cable terminal part exposed from the tip side,
a conductor connection portion that is compressively connected to the cable conductor at a compression connection portion;
a retaining part that connects the cable insulator and the conductor connection part to restrict movement of the cable insulator with respect to the conductor connection part;
Equipped with
The retaining part is
The conductor connection part is arranged so as to straddle the cable insulator from the outer periphery of the end on the rear end side of the compression connection part , and the first end in the longitudinal direction is connected to either the conductor connection part or the cable insulator. a retaining member engaged with one of the two;
a fixing member that anchors and fixes the second end of the anchoring member in the longitudinal direction to either the outer periphery of the end of the conductor connection portion or the cable insulator;
has.
本発明によれば、ケーブル導体および導体接続部の圧縮伸びのバラツキの影響を受けずに引留部材を取り付けることができる。 According to the present invention, the retaining member can be attached without being affected by variations in compressive elongation of the cable conductor and the conductor connection portion.
［第１の実施の形態］
以下、本発明の実施の形態を図面に基づいて詳細に説明する。図１は、本発明の一実施の形態に係るケーブル接続部１の全体構成を示す半断面図である。図２は、図１における導体接続部付近の拡大図である。図１および図２に示すケーブル接続部１は、ケーブル端末部同士を接続する中間接続部の例である。また、図１および図２において、導体接続部側を「先端」、電力ケーブル側を「後端」と称する。
[First embodiment]
Hereinafter, embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a half-sectional view showing the overall configuration of a cable connection section 1 according to an embodiment of the present invention. FIG. 2 is an enlarged view of the vicinity of the conductor connection portion in FIG. 1. The cable connection section 1 shown in FIGS. 1 and 2 is an example of an intermediate connection section that connects cable terminal sections. Further, in FIGS. 1 and 2, the conductor connection portion side is referred to as the "tip" and the power cable side is referred to as the "rear end."
図１に示すように、ケーブル接続部１は、第１の電力ケーブル１１の端末部、第２の電力ケーブル１２の端末部、導体接続部２０、補強絶縁部３０、および保護ケース４０等を備える。ここでは、ケーブル接続部１は、ケーブル中間接続部である。以下において、第１の電力ケーブル１１と第２の電力ケーブル１２を区別しない場合は、単に「電力ケーブル１１、１２」と称する。 As shown in FIG. 1, the cable connection section 1 includes a terminal section of a first power cable 11, a terminal section of a second power cable 12, a conductor connection section 20, a reinforcing insulation section 30, a protective case 40, etc. . Here, the cable connection 1 is a cable intermediate connection. In the following, when the first power cable 11 and the second power cable 12 are not distinguished, they are simply referred to as "power cables 11, 12."
電力ケーブル１１、１２は、内側から順に、ケーブル導体１１１、１２１、内部半導電層（図示略）、ケーブル絶縁体１１２、１２２、ケーブル外部半導電層１１３、１２３、ケーブル遮へい層１１４、１２４、およびケーブルシース１１５、１２５等を有する。電力ケーブル１１、１２の端末部が所定長で段剥ぎされることにより、各端末部の先端側から各層（ケーブル導体１１１、１２１、ケーブル絶縁体１１２、１２２、ケーブル外部半導電層１１３、１２３およびケーブル遮へい層１１４、１２４）が露出する。 The power cables 11 and 12 include, in order from the inside, cable conductors 111 and 121, an inner semiconducting layer (not shown), cable insulators 112 and 122, cable outer semiconducting layers 113 and 123, cable shielding layers 114 and 124, and It has cable sheaths 115, 125, etc. By stripping the terminal parts of the power cables 11 and 12 at predetermined lengths, each layer (cable conductors 111, 121, cable insulators 112, 122, cable external semiconductive layers 113, 123, and The cable shielding layers 114, 124) are exposed.
導体接続部２０は、本実施の形態では、第１の電力ケーブル１１のケーブル導体１１１と第２の電力ケーブル１２のケーブル導体１２１を電気的かつ機械的に接続する導体接続管である。導体接続部２０は、例えば銅、アルミニウム、銅合金、またはアルミニウム合金等からなる通電に適した導電性材料で形成される。 In this embodiment, the conductor connection section 20 is a conductor connection tube that electrically and mechanically connects the cable conductor 111 of the first power cable 11 and the cable conductor 121 of the second power cable 12. The conductor connection portion 20 is formed of a conductive material suitable for conducting electricity, such as copper, aluminum, copper alloy, or aluminum alloy.
図３に導体接続部２０の構成を示す。導体接続部２０は、円筒状に構成されており、通電部２１と、圧縮接続部２２とを有する。 FIG. 3 shows the configuration of the conductor connection section 20. The conductor connection part 20 is configured in a cylindrical shape and includes a current-carrying part 21 and a compression connection part 22.
通電部２１は、導体接続部２０の軸方向の中央に設けられている。 The current-carrying portion 21 is provided at the center of the conductor connecting portion 20 in the axial direction.
圧縮接続部２２は、通電部２１の軸方向の両側にそれぞれ設けられている。圧縮接続部２２は先端側（通電部２１側）に第１凹陥部２２Ｂ、後端側（端部２０Ａ側）に第２凹陥部２２Ｃが設けられている。圧縮接続部２２は、第１凹陥部２２Ｂを介して通電部２１に連設されており、第２凹陥部２２Ｃを介して圧縮接続部２２より小径の端部２０Ａに連設されている。導体接続部２０の圧縮接続部２２および端部２０Ａは、端部２０Ａ側が開放され軸方向に形成されるそれぞれの穴が連通したケーブル挿入部２２Ａを有し、有底筒状に形成されている。ケーブル導体１１１、１２１の各先端部分が各ケーブル挿入部２２Ａに挿入されて、圧縮接続される。第１凹陥部２２Ｂ、第２凹陥部２２Ｃによって、ケーブル導体１１１、１２１に導体接続部２０を圧縮接続する際の導体接続部２０の伸びや変形を吸収することができる。具体的には、第１凹陥部２２Ｂによって、圧縮接続の際の通電部２１の変形を防止し、第２凹陥部２２Ｃによって、圧縮接続の際の端部２０Ａの変形を防止することができる。 The compression connection portions 22 are provided on both sides of the current-carrying portion 21 in the axial direction. The compression connection portion 22 is provided with a first concave portion 22B on the front end side (on the current-carrying portion 21 side) and a second concave portion 22C on the rear end side (on the end portion 20A side). The compression connection portion 22 is connected to the current-carrying portion 21 via the first recess 22B, and is connected to the end portion 20A having a smaller diameter than the compression connection portion 22 via the second recess 22C. The compression connection part 22 and the end part 20A of the conductor connection part 20 have a cable insertion part 22A which is open on the end part 20A side and communicates with each hole formed in the axial direction, and is formed in a bottomed cylindrical shape. . The tip portions of the cable conductors 111 and 121 are inserted into each cable insertion portion 22A and are compressed and connected. The first concave portion 22B and the second concave portion 22C can absorb elongation and deformation of the conductor connection portion 20 when the conductor connection portion 20 is compressively connected to the cable conductors 111 and 121. Specifically, the first recessed portion 22B can prevent deformation of the current-carrying portion 21 during compression connection, and the second recessed portion 22C can prevent deformation of the end portion 20A during compression connection.
また、導体接続部２０は、引留部６０（図１参照）によりケーブル絶縁体１１２、１２２と連結される。引留部６０は、ケーブル絶縁体１１２、１２２のシュリンクバックを防止する。ケーブル絶縁体１１２、１２２、導体接続部２０および引留部６０を含むシュリンクバック防止構造については後述する。 Further, the conductor connecting portion 20 is connected to the cable insulators 112 and 122 by a retaining portion 60 (see FIG. 1). Detention portion 60 prevents shrinkback of cable insulators 112, 122. The shrink-back prevention structure including the cable insulators 112, 122, the conductor connection portion 20, and the retaining portion 60 will be described later.
図１に戻り、補強絶縁部３０は、電力ケーブル１１、１２のケーブル導体１１１、１２１および導体接続部２０の外側を囲繞するように配置される。本実施の形態では、補強絶縁部３０は、ゴム絶縁部３１、内部電極３２、ストレスコーン部３３、３４、および外部遮へい層３５が一体的にモールド成形されたワンピースのゴムブロック絶縁体である。このようなケーブル接続部は、ゴムブロックジョイント（ＲＢＪ）などと呼ばれる。図１に示す実施の形態では、補強絶縁部３０は外部遮へい層３５がストレスコーン部３３、３４の双方に接続された縁切り無し構造である。補強絶縁部３０を形成するゴム材料には、例えば、シリコーンゴムまたはエチレンプロピレンゴム（ＥＰゴム）が好適である。補強絶縁部３０は、縁切り無し構造に限定されず、外部遮へい層３５がストレスコーン部３３、３４のいずれか一方に接続された片端縁切り構造であってもよく、外部遮へい層３５がストレスコーン部３３、３４のいずれにも接続されていない両端縁切り構造であってもよい。 Returning to FIG. 1, the reinforcing insulating section 30 is arranged so as to surround the outside of the cable conductors 111, 121 of the power cables 11, 12 and the conductor connection section 20. In this embodiment, the reinforcing insulating section 30 is a one-piece rubber block insulator in which a rubber insulating section 31, an internal electrode 32, stress cone sections 33, 34, and an external shielding layer 35 are integrally molded. Such a cable connection is called a rubber block joint (RBJ) or the like. In the embodiment shown in FIG. 1, the reinforcing insulation section 30 has an uncut structure in which an external shielding layer 35 is connected to both stress cone sections 33,34. For example, silicone rubber or ethylene propylene rubber (EP rubber) is suitable for the rubber material forming the reinforcing insulating part 30. The reinforcing insulating part 30 is not limited to a structure without edge cutting, and may have a one-edge edge cutting structure in which the external shielding layer 35 is connected to either one of the stress cone parts 33 and 34, and the outer shielding layer 35 is connected to the stress cone part. It may be a structure in which edges are cut at both ends and not connected to either 33 or 34.
内部電極３２、ストレスコーン部３３、３４、および外部遮へい層３５（モールド成形の場合）は、モールド成形上、同じ材料で形成するのが好ましく、例えば、半導電シリコーンゴムまたは半導電エチレンプロピレンゴム（半導電ＥＰゴム）が好適である。また、ゴム絶縁部３１も、これらと同じ種類の導電性を有さない絶縁材料で形成するのが好ましい。なお、内部電極３２と導体接続部２０は、導体接続部２０の外周に半導電テープ（図示略）を巻いて、半導電テープと内部電極３２とを当接させることで電気的に接続してもよいし、内部電極３２と導体接続部２０とが直接接するように構成することで電気的に接続してもよい。 The internal electrode 32, the stress cone parts 33, 34, and the external shielding layer 35 (in the case of molding) are preferably formed of the same material for molding, such as semiconductive silicone rubber or semiconductive ethylene propylene rubber ( Semi-conductive EP rubber) is preferred. Further, it is preferable that the rubber insulating portion 31 is also formed of the same type of insulating material that does not have conductivity. The internal electrode 32 and the conductor connection part 20 are electrically connected by wrapping a semiconducting tape (not shown) around the outer periphery of the conductor connection part 20 and bringing the semiconducting tape and the internal electrode 32 into contact. Alternatively, the internal electrode 32 and the conductor connecting portion 20 may be configured to be in direct contact with each other to electrically connect.
補強絶縁部３０は、例えば、工場でスパイラルコア（インナーコアとも呼ばれる）等の拡径部材により拡径された状態で保持される。そして、補強絶縁部３０は、施工現場で電力ケーブル１１、１２の端末部および導体接続部２０を囲繞するように配置された後、拡径部材を引き抜くことにより、ゴムの自己収縮力により導体接続部２０に密着して装着される。これにより、ケーブル接続部（ここでは直線接続部）１における絶縁性能が確保される。なお、補強絶縁部３０は、スパイラルコア等のいわゆる工場拡径タイプに限定されず、拡径治具や拡径装置を用いて施工現場で拡径する、いわゆる現地拡径タイプでもよい。さらには、補強絶縁部３０は、補強絶縁部３０に電力ケーブル１１、１２の端末部および導体接続部２０が圧入されるプラグイン方式のものであってもよい。この場合、ケーブル導体１１１とケーブル導体１２１の接続は、本実施の形態のような１つの導体接続管（導体接続部２０）ではなく、ケーブル導体１１１、１２１それぞれに導体接続端子（導体接続部）を圧縮接続する構成を有し、導体接触子等を介して補強絶縁部３０内で接続する構成となる。 The reinforcing insulating part 30 is held in a state in which the diameter is expanded by a diameter expanding member such as a spiral core (also called an inner core) at a factory, for example. After the reinforcing insulating part 30 is placed so as to surround the terminal parts and the conductor connection part 20 of the power cables 11 and 12 at the construction site, the conductor connection is made by pulling out the expanded diameter member and using the self-contracting force of the rubber. It is attached in close contact with the section 20. Thereby, the insulation performance at the cable connection part (here, the straight connection part) 1 is ensured. Note that the reinforcing insulating part 30 is not limited to a so-called factory expanded diameter type such as a spiral core, but may be a so-called on-site diameter expanded type in which the diameter is expanded at the construction site using a diameter expanding jig or a diameter expanding device. Furthermore, the reinforcing insulating part 30 may be of a plug-in type in which the terminal parts of the power cables 11 and 12 and the conductor connecting part 20 are press-fitted into the reinforcing insulating part 30. In this case, the cable conductor 111 and the cable conductor 121 are connected by a conductor connection terminal (conductor connection part) on each of the cable conductors 111 and 121, instead of using one conductor connection pipe (conductor connection part 20) as in this embodiment. It has a configuration in which the two are compressed and connected, and the connection is made within the reinforcing insulating part 30 via a conductor contact or the like.
保護ケース４０は、電力ケーブル１１、１２の端末部および補強絶縁部３０を囲繞するように配置される。保護ケース４０は、例えば銅管で形成され、その外周に防食のため例えばＰＶＣ層（図示略）が銅管と一体的に設けられる。保護ケース４０は、銅管の端部、具体的にはＰＶＣ層の端部に跨るように、例えばテープ巻きによって防食層５０を形成することにより、電力ケーブル１１、１２のケーブルシース１１５、１２５に固定される。さらに、補強絶縁部３０と保護ケース４０との間には防水混和物（符号略、例えばウレタン等の防水コンパウンド）が充填される。保護ケース４０および防水混和物により、ケーブル接続部１の遮水性が確保される。 The protective case 40 is arranged to surround the terminal portions of the power cables 11 and 12 and the reinforcing insulating portion 30. The protective case 40 is formed of, for example, a copper tube, and a PVC layer (not shown), for example, is provided integrally with the copper tube on its outer periphery for corrosion protection. The protective case 40 is attached to the cable sheaths 115, 125 of the power cables 11, 12 by forming an anti-corrosion layer 50 by wrapping tape, for example, so as to span the ends of the copper pipes, specifically, the ends of the PVC layer. Fixed. Further, a waterproof compound (code omitted; for example, a waterproof compound such as urethane) is filled between the reinforcing insulating part 30 and the protective case 40. The protective case 40 and the waterproof mixture ensure the water-blocking properties of the cable connection portion 1.
電力ケーブル１１、１２のケーブル遮へい層１１４、１２４は、ここではワイヤーシールドで形成されている。ワイヤーシールドは複数本まとめて一括で編組線１１７の一方の端部とともに圧着スリーブ１１８にて圧着され、編組線１１７の他方の端部は保護ケース４０に半田付けされる。これにより、ケーブル遮へい層１１４、１２４は、保護ケース４０と電気的に接続され、接地される。なお、ケーブル遮へい層１１４、１２４はワイヤーシールドに代えて、銅テープ、鉛被またはアルミ被で形成されてもよい。 The cable shielding layers 114, 124 of the power cables 11, 12 are here formed of wire shields. A plurality of wire shields are crimped together with one end of the braided wire 117 using a crimping sleeve 118, and the other end of the braided wire 117 is soldered to the protective case 40. Thereby, the cable shielding layers 114 and 124 are electrically connected to the protective case 40 and grounded. Note that the cable shielding layers 114 and 124 may be formed of copper tape, lead sheathing, or aluminum sheathing instead of wire shielding.
次に、ケーブル接続部１におけるシュリンクバック防止構造について説明する。 Next, a shrink-back prevention structure in the cable connection portion 1 will be explained.
図２に示すように、本実施の形態に係るケーブル接続部１には、ケーブル絶縁体１１２、１２２のシュリンクバック防止構造として、引留部６０が設けられている。引留部６０は、ケーブル絶縁体１１２、１２２と導体接続部２０とを連結して導体接続部２０に対するケーブル絶縁体１１２、１２２の移動を規制する。引留部６０は、引留部材６１および固定部材７０を有する。導体接続部２０は、上述したように、引留部６０を介してケーブル絶縁体１１２、１２２の先端部１１６、１２６に連結される。 As shown in FIG. 2, the cable connection section 1 according to the present embodiment is provided with a retaining section 60 as a structure for preventing shrinkage of the cable insulators 112 and 122. The retaining portion 60 connects the cable insulators 112, 122 and the conductor connection portion 20, and restricts movement of the cable insulators 112, 122 with respect to the conductor connection portion 20. The retaining portion 60 includes a retaining member 61 and a fixing member 70. The conductor connection portion 20 is connected to the tip portions 116, 126 of the cable insulators 112, 122 via the detent portion 60, as described above.
本実施の形態に係るケーブル絶縁体１１２、１２２の先端部１１６、１２６は、後端側の部位よりも小径になるように切削加工されている。先端部１１６、１２６の先端側外周面には、引留部材６１と係合する環状突起１１６Ａ、１２６Ａが形成されている。環状突起１１６Ａ、１２６Ａは、先端部１１６、１２６の先端側外周面から、径方向外側に突出する。環状突起１１６Ａ、１２６Ａとケーブル絶縁体１１２、１２２の後端側の部位との間、すなわち先端部１１６、１２６の後端側には、溝１１６Ｂ、１２６Ｂが形成される。 The tip portions 116, 126 of the cable insulators 112, 122 according to this embodiment are cut to have a smaller diameter than the portion on the rear end side. Annular protrusions 116A and 126A that engage with the retaining member 61 are formed on the outer circumferential surfaces of the distal ends 116 and 126 on the distal side. The annular protrusions 116A, 126A protrude radially outward from the outer peripheral surfaces of the distal ends 116, 126 on the distal side. Grooves 116B, 126B are formed between the annular protrusions 116A, 126A and the rear end portions of the cable insulators 112, 122, that is, on the rear end sides of the tip portions 116, 126.
また、図３に示すように、導体接続部２０の端部２０Ａ、言い換えれば、圧縮接続部２２に第２凹陥部２２Ｃを介して連設する後端側には、その他の部位の外径よりも小さく形成されている。導体接続部２０の端部２０Ａは、その外周面において凹凸形状の凹凸外周面２３を有している。凹凸外周面２３は、例えば、雄ネジ形状を有する。 Further, as shown in FIG. 3, the end 20A of the conductor connection part 20, in other words, the rear end side that is connected to the compression connection part 22 via the second recessed part 22C is larger than the outer diameter of other parts. It is also formed small. The end portion 20A of the conductor connection portion 20 has an uneven outer circumferential surface 23 having an uneven shape on its outer circumferential surface. The uneven outer circumferential surface 23 has, for example, a male screw shape.
固定部材７０（図２参照）は、例えば六角穴付き止めネジ等の雄ネジ形状を有するネジ部材であり、導体接続部２０に対するケーブル絶縁体１１２、１２２の移動を規制するように引留部材６１を導体接続部２０に引留固定する。 The fixing member 70 (see FIG. 2) is a screw member having a male thread shape, such as a set screw with a hexagonal socket, for example. It is fixedly fixed to the conductor connection part 20.
図２に示すように、引留部材６１は、導体接続部２０からケーブル絶縁体１１２、１２２に跨がるように配置される。引留部材６１において、ケーブル絶縁体１１２、１２２の先端部と係合する端部を「第１端部」、凹凸外周面２３に配置される端部を「第２端部」と称する。 As shown in FIG. 2, the retaining member 61 is arranged so as to extend from the conductor connection portion 20 to the cable insulators 112 and 122. In the retaining member 61, the end that engages with the tip ends of the cable insulators 112 and 122 is referred to as a "first end", and the end disposed on the uneven outer circumferential surface 23 is referred to as a "second end".
また、図５に示すように、引留部材６１は、例えば、半円筒状の金属部材により構成された２つの半円筒状部６１１、６１２を組み合わせて、図４に示すように、円筒状に構成される。構成されている。このような引留部材は、連結導体やカップリング導体などと呼ばれる部材の構成と類似の構成を有する。２つの半円筒状部６１１、６１２が組み合わされる際に互いに対面する側面には、ボルト挿通孔６１Ｅが形成されている。ボルト挿通孔６１Ｅは、図５に示す左右の側面にそれぞれ形成されている。 Further, as shown in FIG. 5, the retaining member 61 is configured into a cylindrical shape as shown in FIG. be done. It is configured. Such a restraining member has a configuration similar to that of a member called a connection conductor, a coupling conductor, or the like. A bolt insertion hole 61E is formed in the side surfaces facing each other when the two semi-cylindrical parts 611 and 612 are combined. The bolt insertion holes 61E are formed on the left and right side surfaces shown in FIG. 5, respectively.
また、図５における下側の半円筒状部６１２の外周面におけるボルト挿通孔６１Ｅに対応する位置には、ボルト挿通孔６１Ｅにボルトを挿通するためのボルト配置部６１Ｆが形成されている。ボルト配置部６１Ｆは、半円筒状部６１２の外周面よりも凹んで形成されている。 Furthermore, a bolt placement portion 61F for inserting a bolt into the bolt insertion hole 61E is formed at a position corresponding to the bolt insertion hole 61E on the outer peripheral surface of the lower semicylindrical portion 612 in FIG. The bolt placement portion 61F is formed to be recessed from the outer peripheral surface of the semi-cylindrical portion 612.
これらの半円筒状部６１１、６１２は、第２内周面６１Ｃの部分をケーブル絶縁体１１２、１２２に係合した状態で、互いに組み合わされる。 These semi-cylindrical parts 611 and 612 are combined with each other with the second inner peripheral surface 61C being engaged with the cable insulators 112 and 122.
半円筒状部６１１、６１２が互いに組み合わされたら、ボルト配置部６１Ｆから各ボルト挿通孔６１Ｅにボルトを挿通することで、各半円筒状部６１１、６１２が締結され、引留部材６１として機能する。 Once the semi-cylindrical parts 611 and 612 are combined with each other, the semi-cylindrical parts 611 and 612 are fastened together and function as the retaining member 61 by inserting a bolt from the bolt placement part 61F into each bolt insertion hole 61E.
引留部材６１には、外周面から内周面にわたって貫通する貫通孔６１Ａが形成されている。貫通孔６１Ａは、上述の導体接続部２０の凹凸外周面２３に対応する箇所に位置している。貫通孔６１Ａは、固定部材７０が通される雌ネジ形状を有している。貫通孔６１Ａは、例えば、引留部材６１の周囲において、同一円周上に４つ形成されている。 The retaining member 61 is formed with a through hole 61A that penetrates from the outer circumferential surface to the inner circumferential surface. The through hole 61A is located at a location corresponding to the uneven outer circumferential surface 23 of the conductor connection portion 20 described above. The through hole 61A has a female thread shape through which the fixing member 70 is passed. For example, four through holes 61A are formed on the same circumference around the retaining member 61.
図６は図５のＡ－Ａ矢視図（ただし、ボルト挿通孔６１Ｅは図示略）である。図６に示すように、引留部材６１の第１端部は、ケーブル絶縁体１１２、１２２（先端部）の形状に対応するように段差状に構成されている。引留部材６１の第２端部の内周（具体的には、第１内周面６１Ｂ）は、導体接続部２０の外周（凹凸外周面２３）に対応するように構成されている。引留部材６１は、第１内周面６１Ｂと、第２内周面６１Ｃと、第３内周面６１Ｄとを有する。 FIG. 6 is a view taken along the line AA in FIG. 5 (however, the bolt insertion hole 61E is not shown). As shown in FIG. 6, the first end portion of the retaining member 61 is configured in a step shape to correspond to the shape of the cable insulators 112, 122 (tip portions). The inner circumference (specifically, the first inner circumferential surface 61B) of the second end of the retaining member 61 is configured to correspond to the outer circumference (the uneven outer circumferential surface 23) of the conductor connection portion 20. The retaining member 61 has a first inner circumferential surface 61B, a second inner circumferential surface 61C, and a third inner circumferential surface 61D.
第１内周面６１Ｂは、上述の導体接続部２０の凹凸外周面２３と対面する内周面である。上述の貫通孔６１Ａに固定部材７０が通されて締結されることで、引留部材６１が導体接続部２０に引留固定される。 The first inner circumferential surface 61B is an inner circumferential surface that faces the uneven outer circumferential surface 23 of the conductor connection portion 20 described above. By passing the fixing member 70 through the above-described through hole 61A and fastening it, the retaining member 61 is retained and fixed to the conductor connecting portion 20.
第２内周面６１Ｃは、ケーブル絶縁体１１２、１２２の環状突起１１６Ａ、１２６Ａに対面する内周面であり、内径が第１内周面６１Ｂよりも大きくなっている。 The second inner circumferential surface 61C is an inner circumferential surface facing the annular projections 116A, 126A of the cable insulators 112, 122, and has an inner diameter larger than the first inner circumferential surface 61B.
第３内周面６１Ｄは、第２内周面６１Ｃに対して第１内周面６１Ｂとは反対側に位置する内周面である。第３内周面６１Ｄは、引留部材６１の第１端部側に設けられている。第３内周面６１Ｄは、内径が第１内周面６１Ｂより大きく、かつ、第２内周面６１Ｃよりも小さくなっている。 The third inner circumferential surface 61D is an inner circumferential surface located on the opposite side of the first inner circumferential surface 61B with respect to the second inner circumferential surface 61C. The third inner circumferential surface 61D is provided on the first end side of the retaining member 61. The third inner circumferential surface 61D has an inner diameter larger than the first inner circumferential surface 61B and smaller than the second inner circumferential surface 61C.
このように構成されることで、引留部材６１の内周面には、第２内周面６１Ｃの部分で溝部が形成されている。この溝部にケーブル絶縁体１１２、１２２の環状突起１１６Ａ、１２６Ａが係合する（図２も参照）。つまり、引留部材６１の長手方向の端部である溝部およびケーブル絶縁体１１２、１２２は、互いに係合する凹凸構造を有する。 With this configuration, a groove is formed in the inner circumferential surface of the retaining member 61 at the second inner circumferential surface 61C. The annular protrusions 116A, 126A of the cable insulators 112, 122 engage in this groove (see also FIG. 2). In other words, the groove portion that is the longitudinal end portion of the retaining member 61 and the cable insulators 112 and 122 have an uneven structure that engages with each other.
なお、各内周面の内径は、対面する部材に応じて適宜変更してもよい。また、ケーブル絶縁体１１２、１２２の先端部１１６、１２６の環状突起１１６Ａ、１２６Ａ以外の部分、すなわち溝１１６Ｂ、１２６Ｂの外径を小さくすると、それに合わせて引留部材６１の第３内周面６１Ｄの部分を他の部分よりも突出させることができる。そうすることで、引留部材６１とケーブル絶縁体１１２、１２２との係合力を強固なものとすることができる。 Note that the inner diameter of each inner circumferential surface may be changed as appropriate depending on the members facing each other. Furthermore, when the outer diameter of the portions other than the annular protrusions 116A and 126A of the tip portions 116 and 126 of the cable insulators 112 and 122, that is, the grooves 116B and 126B is made smaller, the third inner circumferential surface 61D of the retaining member 61 is made smaller. Some parts can be made to protrude more than others. By doing so, the engagement force between the retaining member 61 and the cable insulators 112 and 122 can be strengthened.
図７に示すように、固定部材７０は、組み合わされた引留部材６１の貫通孔６１Ａに通される。固定部材７０の先端は、貫通孔６１Ａを介して、導体接続部２０の外周面である凹凸外周面２３に接触する。具体的には、固定部材７０の先端は、凹凸外周面２３の複数の凹部（ここでは、雄ネジ形状の凹部）の何れかに嵌まり込む。これにより、引留部材６１が、導体接続部２０とケーブル絶縁体１１２、１２２とを連結し、かつ、導体接続部２０に引留固定される。 As shown in FIG. 7, the fixing member 70 is passed through the through hole 61A of the combined retaining member 61. The tip of the fixing member 70 contacts the uneven outer peripheral surface 23, which is the outer peripheral surface of the conductor connecting portion 20, through the through hole 61A. Specifically, the tip of the fixing member 70 fits into any one of a plurality of recesses (here, male screw-shaped recesses) of the uneven outer circumferential surface 23 . As a result, the retaining member 61 connects the conductor connecting portion 20 and the cable insulators 112 and 122, and is retained and fixed to the conductor connecting portion 20.
ところで、例えば、導体接続部と引留部材とを互いに係合させて固定する構成であると、引留部材と導体接続部とを係合させる部分の寸法を合わせる必要が生じる。しかし、ケーブル導体を圧縮接続した際のケーブル導体および導体接続部の圧縮伸びのバラツキによって、寸法に変化が生じて引留部材と導体接続部とを係合させて固定できないおそれがある。 By the way, for example, in a configuration in which the conductor connecting portion and the retaining member are engaged with each other and fixed, it is necessary to match the dimensions of the portion where the retaining member and the conductor connecting portion are engaged. However, due to variations in the compression and elongation of the cable conductor and the conductor connection portion when the cable conductor is compressed and connected, the dimensions may change, and there is a possibility that the retaining member and the conductor connection portion cannot be engaged and fixed.
本実施の形態では、固定部材７０の先端が凹凸外周面２３に接触することで、引留部材６１を導体接続部２０に引留固定するので、ケーブル導体１１１、１２１および導体接続部２０の圧縮伸びのバラツキの影響を受けずに引留部材６１を導体接続部２０に取り付けることができる。 In this embodiment, the retaining member 61 is retained and fixed to the conductor connecting portion 20 by the tip of the fixing member 70 coming into contact with the uneven outer circumferential surface 23, so that the compression and elongation of the cable conductors 111, 121 and the conductor connecting portion 20 is prevented. The retaining member 61 can be attached to the conductor connection portion 20 without being affected by variations.
また、引留部材６１をケーブル絶縁体１１２、１２２に係合させた状態で、導体接続部２０を引留固定するので、ケーブル絶縁体１１２、１２２のシュリンクバックの発生を抑制することができる。 Further, since the conductor connecting portion 20 is fixed with a restraint while the retaining member 61 is engaged with the cable insulators 112 and 122, the occurrence of shrinkback of the cable insulators 112 and 122 can be suppressed.
また、凹凸外周面２３が凹凸形状を構成するので、固定部材７０の先端が何れかの凹部に嵌まり込む。これにより、固定部材７０が凹凸外周面２３に固定されるので、引留部６０による引留力を向上させることができる。 Moreover, since the uneven outer circumferential surface 23 has an uneven shape, the tip of the fixing member 70 fits into any of the recesses. Thereby, the fixing member 70 is fixed to the uneven outer circumferential surface 23, so that the retaining force by the retaining portion 60 can be improved.
また、例えばネジ穴を導体接続部に設け、止めネジをネジ穴に固定することで引留部材と導体接続部を固定する構成であると、引留部材の第１端部をケーブル絶縁体に合わせたときに、引留部材の貫通孔の位置とネジ穴の位置とが合わないことがある。それに対し、本実施の形態では、凹凸外周面２３における複数の凹部の何れかに固定部材７０の先端を嵌まり込ませるだけで引留部材６１を導体接続部２０に引留固定することができる。その結果、止めネジが挿通されるネジ穴を導体接続部に設ける構成と比較して、簡易な構成により、引留部材６１における固定位置の自由度が向上し、確実に引留部材６１を固定することができる。また、固定部材７０は、六角穴付き止めネジのような汎用品を用いることができるので、安価に引留部６０を形成することができる。 In addition, for example, if the retaining member and the conductor connecting portion are fixed by providing a screw hole in the conductor connecting portion and fixing a set screw in the screw hole, the first end of the retaining member may be aligned with the cable insulator. Sometimes, the position of the through hole of the retaining member and the position of the screw hole do not match. In contrast, in the present embodiment, the retaining member 61 can be retained and fixed to the conductor connecting portion 20 simply by fitting the tip of the fixing member 70 into any of the plurality of recesses on the uneven outer circumferential surface 23. As a result, compared to a configuration in which a screw hole through which a set screw is inserted is provided in the conductor connection part, the flexibility of the fixing position of the retaining member 61 is improved due to the simple configuration, and the retaining member 61 can be securely fixed. Can be done. Moreover, since the fixing member 70 can be a general-purpose item such as a hexagon socket set screw, the retaining part 60 can be formed at low cost.
また、２つの引留部材６１の一方に２つのボルト配置部６１Ｆを設けることで、同じ方向から２つの引留部材６１を組付けることができるので、組付作業の効率を向上させることができる。 Further, by providing two bolt arrangement portions 61F on one of the two retaining members 61, the two retaining members 61 can be assembled from the same direction, so that the efficiency of the assembly work can be improved.
また、引留部材６１が円筒状に構成されているので、ケーブル絶縁体１１２、１２２および導体接続部２０の周囲全体を囲うように取り付けることができる。その結果、引留部材６１によりケーブル絶縁体１１２、１２２と導体接続部２０とをしっかりと連結することができる。 Further, since the retaining member 61 is configured in a cylindrical shape, it can be attached so as to surround the entire periphery of the cable insulators 112 and 122 and the conductor connecting portion 20. As a result, the cable insulators 112, 122 and the conductor connecting portion 20 can be firmly connected by the retaining member 61.
また、貫通孔６１Ａが雌ネジ形状を有するので、雄ネジ形状を有する固定部材７０を螺合することで、引留部材６１を安定して固定しやすくすることができる。 Further, since the through hole 61A has a female thread shape, the retaining member 61 can be stably fixed easily by screwing the fixing member 70 having a male thread shape.
なお、上記実施の形態では、引留部材６１が凹部を有し、ケーブル絶縁体１１２、１２２が凸部を有することで、凹凸構造を構成していたが、本発明はこれに限定されない。例えば、引留部材６１が凸部を有し、ケーブル絶縁体１１２、１２２が凹部を有する構成であってもよい。 Note that in the above embodiment, the retaining member 61 has a concave portion and the cable insulators 112 and 122 have convex portions to form a concavo-convex structure, but the present invention is not limited to this. For example, a configuration may be adopted in which the retaining member 61 has a convex portion and the cable insulators 112 and 122 have concave portions.
このような構成であっても、ケーブル導体および導体接続部の圧縮伸びのバラツキの影響を受けずに引留部６０を導体接続部２０に取り付けることができる。 Even with such a configuration, the retaining portion 60 can be attached to the conductor connection portion 20 without being affected by variations in compression and elongation of the cable conductor and the conductor connection portion.
また、上記実施の形態では、２つの半円筒状部６１１、６１２の一方のみ（図５においては図下側の半円筒状部６１２）に２つのボルト配置部６１Ｆが設けられていたが、本発明はこれに限定されない。例えば、図８に示すように、２つの半円筒状部６２１、６２２のそれぞれに１つずつボルト配置部６２Ｆが設けられていてもよい。 Furthermore, in the embodiment described above, only one of the two semi-cylindrical portions 611 and 612 (the lower semi-cylindrical portion 612 in FIG. 5) is provided with two bolt arrangement portions 61F; The invention is not limited to this. For example, as shown in FIG. 8, one bolt arrangement part 62F may be provided in each of the two semi-cylindrical parts 621 and 622.
このような構成では、それぞれのボルト配置部６２Ｆが対称配置になるように引留部材６２が構成される。各ボルト配置部６２Ｆには、図５に示す引留部材６１のボルト挿通孔６１Ｅと同様に、ボルト挿入孔６２Ｅが設けられている。図８に示す引留部材６２は、ボルト配置部６２Ｆの配置以外の構成、つまり、貫通孔６２Ａ、第１内周面６２Ｂ、第２内周面６２Ｃおよび第３内周面６２Ｄは、図５に示す引留部材６１の貫通孔６１Ａ、第１内周面６１Ｂ、第２内周面６１Ｃおよび第３内周面６１Ｄと同様である。 In such a configuration, the retaining member 62 is configured such that the respective bolt placement portions 62F are arranged symmetrically. Each bolt arrangement portion 62F is provided with a bolt insertion hole 62E, similar to the bolt insertion hole 61E of the retaining member 61 shown in FIG. The retaining member 62 shown in FIG. 8 has a structure other than the arrangement of the bolt placement part 62F, that is, the through hole 62A, the first inner circumferential surface 62B, the second inner circumferential surface 62C, and the third inner circumferential surface 62D. This is similar to the through hole 61A, first inner circumferential surface 61B, second inner circumferential surface 61C, and third inner circumferential surface 61D of the retaining member 61 shown.
このような構成であっても、ケーブル導体および導体接続部の圧縮伸びのバラツキの影響を受けずに引留部６０を導体接続部２０に取り付けることができる。ただ、ボルト配置部６１Ｆが同じ側にある図５の構成の方が図８の構成よりも組付作業の作業性の点では好ましい。 Even with such a configuration, the retaining portion 60 can be attached to the conductor connection portion 20 without being affected by variations in compression and elongation of the cable conductor and the conductor connection portion. However, the configuration shown in FIG. 5 in which the bolt arrangement portions 61F are on the same side is preferable to the configuration shown in FIG. 8 from the viewpoint of workability during assembly work.
また、この構成では、各引留部材６１を同一形状とすることができるので、引留部材６１を製造しやすくすることができる。 Moreover, with this configuration, each of the retaining members 61 can be made to have the same shape, so that the retaining members 61 can be manufactured easily.
［第２の実施の形態］
図１０は、本発明の第２の実施の形態に係るケーブル接続部の全体構成を示す半断面図である。なお、第１の実施の形態と同一、または相当する要素には同じ符号を付して、重複する説明は省略する。
[Second embodiment]
FIG. 10 is a half-sectional view showing the overall configuration of a cable connection section according to a second embodiment of the present invention. Note that elements that are the same as or correspond to those in the first embodiment are given the same reference numerals, and redundant explanations will be omitted.
図１０に示すように、ケーブル接続部２は、第１の電力ケーブル１１の端末部、第２の電力ケーブル１２の端末部、導体接続部２０、絶縁ユニット８０、および保護ケース８５等を備える。ケーブル接続部２は、絶縁ユニット８０の両側から電力ケーブル１１、１２の端末部が挿入され、ケーブル導体１１１、１２１同士が接続されるプレハブ型のケーブル中間接続部である。ケーブル中間接続部は、プレモールド型のケーブル中間接続部、プレハブジョイント、ケーブル直線接続部などとも呼ばれる。 As shown in FIG. 10, the cable connection section 2 includes a terminal section of the first power cable 11, a terminal section of the second power cable 12, a conductor connection section 20, an insulation unit 80, a protective case 85, and the like. The cable connection portion 2 is a prefabricated intermediate cable connection portion into which the terminal portions of the power cables 11 and 12 are inserted from both sides of the insulation unit 80 and the cable conductors 111 and 121 are connected to each other. The cable intermediate connection is also called a pre-molded cable intermediate connection, a prefabricated joint, a cable straight connection, etc.
図１０に示すように、絶縁ユニット８０は、ケーブル導体１１１、１２１と電気的に接続される内部導体８２と、内部導体８２の外周面を包囲する主絶縁部８１と、主絶縁部８１の外周面に遮へい層（図示略）を備える。内部導体８２は金属材料で構成され、主絶縁部８１はエポキシ樹脂等の硬質の絶縁体で形成される。遮へい層は、例えば主絶縁部８１の外周面に導電塗料を塗布することで形成される。内部導体８２および主絶縁部８１は、内部導体８２の一部が内周面から露出するように、例えばモールド成型により一体的に形成される。 As shown in FIG. 10, the insulation unit 80 includes an inner conductor 82 that is electrically connected to the cable conductors 111 and 121, a main insulation part 81 that surrounds the outer peripheral surface of the inner conductor 82, and an outer periphery of the main insulation part 81. A shielding layer (not shown) is provided on the surface. The internal conductor 82 is made of a metal material, and the main insulating part 81 is made of a hard insulator such as epoxy resin. The shielding layer is formed, for example, by applying conductive paint to the outer peripheral surface of the main insulating section 81. The internal conductor 82 and the main insulating portion 81 are integrally formed, for example, by molding so that a portion of the internal conductor 82 is exposed from the inner peripheral surface.
絶縁ユニット８０は、主絶縁部８１および内部導体８２を軸方向に貫通する穴を有し、この穴にケーブル端末部が挿通される。 The insulation unit 80 has a hole that passes through the main insulation part 81 and the internal conductor 82 in the axial direction, and the cable end portion is inserted into this hole.
絶縁ユニット８０は、電力ケーブル１１、１２のケーブル導体１１１、１２１および導体接続部２０の外側を囲繞するように配置される。導体接続部２０と内部導体８２は、スリーブ固定部材２４により、導体接続部２０と内部導体８２とを電気的、機械的に接続することができる。導体接続部２０と引留部６０との接続については、第１の実施の形態と同じため、説明を省略する。 The insulation unit 80 is arranged so as to surround the outside of the cable conductors 111 and 121 of the power cables 11 and 12 and the conductor connection part 20. The conductor connecting portion 20 and the internal conductor 82 can be electrically and mechanically connected by the sleeve fixing member 24 . The connection between the conductor connecting portion 20 and the retaining portion 60 is the same as in the first embodiment, and therefore the description thereof will be omitted.
また、絶縁ユニット８０の内側には、先端側からストッパ８４、ストレスコーン（プレモールド絶縁体）８３、ストレスコーン圧縮装置（図示略）等が配置される。 Further, inside the insulating unit 80, a stopper 84, a stress cone (pre-molded insulator) 83, a stress cone compression device (not shown), etc. are arranged from the tip side.
ストレスコーン（プレモールド絶縁体）８３は、先端側の絶縁ゴム部８３Ａと、絶縁ゴム部８３Ａの後端側に連設される半導電ゴム部８３Ｂとからなる。ストレスコーン（プレモールド絶縁体）８３を形成するゴム材料には、エチレンプロピレンゴム（ＥＰゴム）またはシリコーンゴムが好適である。 The stress cone (pre-molded insulator) 83 consists of an insulating rubber part 83A on the tip side and a semiconductive rubber part 83B connected to the rear end side of the insulating rubber part 83A. The rubber material forming the stress cone (pre-molded insulator) 83 is preferably ethylene propylene rubber (EP rubber) or silicone rubber.
保護ケース８５は、電力ケーブル１１、１２の端末部および絶縁ユニット８０を囲繞するように配置される。保護ケース８５は、例えば銅管で形成される。 The protective case 85 is arranged to surround the terminal portions of the power cables 11 and 12 and the insulation unit 80. The protective case 85 is made of, for example, a copper tube.
図１０に示すように、ケーブル接続部２においても、引留部材６１が、導体接続部２０とケーブル絶縁体１１２、１２２とを連結し、かつ、導体接続部２０に引留固定されることにより、第１の実施形態のケーブル接続部１と同様の効果が得られる。 As shown in FIG. 10, also in the cable connection part 2, the retaining member 61 connects the conductor connection part 20 and the cable insulators 112, 122, and is fixed to the conductor connection part 20, so that the The same effects as the cable connection section 1 of the first embodiment can be obtained.
上記実施の形態では、導体接続部２０の凹凸外周面２３が雄ネジ形状で形成されていたが、本発明はこれに限定されない。例えば導体接続部２０の引留部材６１と対面する凹凸外周面２３が、ローレット加工、ディンプル、粗面化処理等により形成されてもよい。例えば、図９に示すように、導体接続部２０が複数のディンプル２５を有する構成の場合、固定部材７０の先端がディンプル２５の何れかに入り込む。これにより、引留部材６１の引留力を向上させることができる。また、当該外周面が、固定部材７０と接触することにより、十分な摩擦力が発現する場合、凹凸形状を有していなくてもよい。 In the embodiment described above, the uneven outer circumferential surface 23 of the conductor connection portion 20 is formed in a male screw shape, but the present invention is not limited to this. For example, the uneven outer circumferential surface 23 of the conductor connecting portion 20 facing the retaining member 61 may be formed by knurling, dimples, roughening, or the like. For example, as shown in FIG. 9, when the conductor connecting portion 20 has a plurality of dimples 25, the tip of the fixing member 70 fits into one of the dimples 25. Thereby, the retaining force of the retaining member 61 can be improved. Moreover, when the outer peripheral surface generates sufficient frictional force by contacting with the fixing member 70, it is not necessary to have an uneven shape.
また、上記実施の形態では、雄ネジ形状を有する固定部材７０を、雌ネジ形状を有する貫通孔６１Ａに螺合することで、引留部材６１を固定する構成としていたが、本発明はこれに限定されず、導体接続部２０に対して引留部材６１を強固に固定できる限り、ネジ部材以外の部材で固定する構造（螺合以外で固定する構造）であってもよい。 Further, in the above embodiment, the retaining member 61 is fixed by screwing the fixing member 70 having a male thread shape into the through hole 61A having a female thread shape, but the present invention is limited to this. However, as long as the retaining member 61 can be firmly fixed to the conductor connection part 20, a structure in which it is fixed with a member other than a screw member (a structure in which it is fixed by means other than screwing) may be used.
また、上記実施の形態では、貫通孔６１Ａが引留部材６１の半円筒状部６１１、６１２それぞれに２つずつ（引留部材６１としては計４つ）設けられていたが、本発明はこれに限定されず、引留部材６１に何個設けられていてもよい。ただし、引留部材６１による引留固定の安定化の観点から、２個以上設けられていることが好ましい。 Further, in the above embodiment, two through holes 61A are provided in each of the semi-cylindrical portions 611 and 612 of the retaining member 61 (total of four in the retaining member 61), but the present invention is limited to this. The retaining member 61 may be provided with any number of retaining members. However, from the viewpoint of stabilizing the restraint fixation by the restraint member 61, it is preferable that two or more members are provided.
また、上記実施の形態では、引留部材６１が２つの部材（半円筒状部６１１、６１２）により構成されていたが、本発明はこれに限定されず、３つ以上の部材により構成されていてもよい。 Further, in the above embodiment, the retaining member 61 is composed of two members (semi-cylindrical parts 611 and 612), but the present invention is not limited to this, and may be composed of three or more members. Good too.
また、上記実施の形態では、引留部材６１がケーブル絶縁体１１２、１２２と係合し、かつ、導体接続部２０に引留固定されていたが、本発明はこれに限定されない。例えば、引留部材が導体接続部と係合し、かつ、ケーブル絶縁体１１２、１２２に引留固定されていてもよい。 Furthermore, in the above embodiment, the retaining member 61 engages with the cable insulators 112 and 122 and is secured to the conductor connecting portion 20, but the present invention is not limited thereto. For example, a detent member may engage the conductor connection and be detented to the cable insulators 112, 122.
また、上記実施の形態では、第１の電力ケーブル１１と第２の電力ケーブル１２とを接続する中間接続部に適用されていたが、本発明はこれに限定されず、終端接続部に適用されていてもよい。この場合、１つの導体接続端子により導体接続部が形成される。 Further, in the above embodiment, the application is applied to the intermediate connection part that connects the first power cable 11 and the second power cable 12, but the present invention is not limited thereto, and can be applied to the terminal connection part. You can leave it there. In this case, the conductor connection portion is formed by one conductor connection terminal.
その他、上記実施の形態は、何れも本発明を実施するにあたっての具体化の一例を示したものに過ぎず、これらによって本発明の技術的範囲が限定的に解釈されてはならないものである。すなわち、本発明はその要旨、またはその主要な特徴から逸脱することなく、様々な形で実施することができる。 In addition, the above-mentioned embodiments are merely examples of implementation of the present invention, and the technical scope of the present invention should not be construed as limited by these. That is, the present invention can be implemented in various forms without departing from its gist or main features.
１ ケーブル接続部
１１、１２ 電力ケーブル
１１１、１２１ ケーブル導体
１１２、１２２ ケーブル絶縁体
１１３、１２３ 外部半導電層
１１４、１２４ ケーブル遮へい層
１１５、１２５ ケーブルシース
１１７ 編組線
１１８ 圧着スリーブ
２０ 導体接続部
２０Ａ 端部
２１ 通電部
２２ 圧縮接続部
２２Ａ ケーブル挿入部
２２Ｂ 第１凹陥部
２２Ｃ 第２凹陥部
２３ 凹凸外周面
３０ 補強絶縁部
３１ ゴム絶縁部
３２ 内部電極
３３、３４ ストレスコーン部
３５ 外部遮へい層
６０ 引留部
６１ 引留部材
６１Ａ 貫通孔
６１Ｂ 第１内周面
６１Ｃ 第２内周面
６１Ｄ 第３内周面
６１Ｅ ボルト挿通孔
６１Ｆ ボルト配置部
７０ 固定部材
２ ケーブル接続部
８０ 絶縁ユニット
８１ 主絶縁部
８２ 内部導体
８３ ストレスコーン
８３Ａ 絶縁ゴム部
８３Ｂ 半導電ゴム部
８４ ストッパ
1 Cable connection part 11, 12 Power cable 111, 121 Cable conductor 112, 122 Cable insulator 113, 123 External semiconducting layer 114, 124 Cable shielding layer 115, 125 Cable sheath 117 Braided wire 118 Crimp sleeve 20 Conductor connection part 20A End Part 21 Current-carrying part 22 Compression connection part 22A Cable insertion part 22B First recessed part 22C Second recessed part 23 Uneven outer peripheral surface 30 Reinforcement insulation part 31 Rubber insulation part 32 Internal electrodes 33, 34 Stress cone part 35 External shielding layer 60 Retention part 61 Retaining member 61A Through hole 61B First inner circumferential surface 61C Second inner circumferential surface 61D Third inner circumferential surface 61E Bolt insertion hole 61F Bolt placement portion 70 Fixing member 2 Cable connection portion 80 Insulation unit 81 Main insulation portion 82 Internal conductor 83 Stress cone 83A Insulating rubber part 83B Semi-conductive rubber part 84 Stopper
Claims (9)
圧縮接続部にて前記ケーブル導体に圧縮接続される導体接続部と、
前記ケーブル絶縁体と前記導体接続部とを連結して前記導体接続部に対する前記ケーブル絶縁体の移動を規制する引留部と、
を備え、
前記引留部は、
前記導体接続部の前記圧縮接続部より後端側の端部外周から前記ケーブル絶縁体に跨がるように配置され、長手方向における第１端部が前記導体接続部および前記ケーブル絶縁体の何れか一方に係合される引留部材と、
前記引留部材の前記長手方向における第２端部を前記導体接続部の前記端部外周および前記ケーブル絶縁体の何れか他方に引留固定する固定部材と、
を有する、
ケーブル接続部。 A cable connection part in which a cable conductor and a cable insulator are connected to a cable terminal part exposed from the tip side,
a conductor connection portion that is compressively connected to the cable conductor at a compression connection portion;
a retaining part that connects the cable insulator and the conductor connection part to restrict movement of the cable insulator with respect to the conductor connection part;
Equipped with
The retaining part is
The conductor connection part is arranged so as to straddle the cable insulator from the outer periphery of the end on the rear end side of the compression connection part , and the first end in the longitudinal direction is connected to either the conductor connection part or the cable insulator. a retaining member engaged with one of the two;
a fixing member that anchors and fixes the second end of the anchoring member in the longitudinal direction to either the outer periphery of the end of the conductor connection portion or the cable insulator;
has,
Cable connection.
前記第２端部は、前記導体接続部に固定される、
請求項１に記載のケーブル接続部。 the first end is engaged with the cable insulation;
the second end portion is fixed to the conductor connection portion;
Cable connection according to claim 1.
請求項１または請求項２に記載のケーブル接続部。 The retaining member has a cylindrical shape,
The cable connection part according to claim 1 or claim 2.
前記固定部材は、前記貫通孔を介して前記導体接続部の外周面に接触することにより前記引留部材を引留固定する、
請求項１～３の何れか１項に記載のケーブル接続部。 The retaining member has a through hole formed at the second end at a position corresponding to the outer circumferential surface of the conductor connection part,
The fixing member retains and fixes the retaining member by contacting the outer circumferential surface of the conductor connection portion through the through hole.
The cable connection portion according to any one of claims 1 to 3.
前記固定部材は、雄ネジ形状を有するネジ部材である、
請求項４に記載のケーブル接続部。 The through hole has a female thread shape,
The fixing member is a screw member having a male thread shape.
Cable connection according to claim 4.
請求項４または請求項５に記載のケーブル接続部。 The conductor connection portion has an uneven shape on an outer circumferential surface of a portion corresponding to the second end portion.
The cable connection part according to claim 4 or claim 5.
請求項４～６の何れか１項に記載のケーブル接続部。 A plurality of the through holes are formed around the retaining member,
The cable connection portion according to any one of claims 4 to 6.
請求項２～７の何れか１項に記載のケーブル接続部。 The first end portion and the cable insulator have a concave-convex structure that engages with each other.
The cable connection section according to any one of claims 2 to 7.
請求項１～８の何れか１項に記載のケーブル接続部。 The retaining member is composed of a plurality of members,
The cable connection portion according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020079727A JP7431658B2 (en) | 2020-04-28 | 2020-04-28 | Cable connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020079727A JP7431658B2 (en) | 2020-04-28 | 2020-04-28 | Cable connection |
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| Publication Number | Publication Date |
|---|---|
| JP2021175333A JP2021175333A (en) | 2021-11-01 |
| JP7431658B2 true JP7431658B2 (en) | 2024-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2020079727A Active JP7431658B2 (en) | 2020-04-28 | 2020-04-28 | Cable connection |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003009371A (en) | 2001-06-22 | 2003-01-10 | Mitsutoshi Watanabe | Power supply cable connector |
| JP2009106014A (en) | 2007-10-22 | 2009-05-14 | Viscas Corp | Power cable connecting part and conductor connecting pipe |
| JP2016012974A (en) | 2014-06-27 | 2016-01-21 | 株式会社ジェイ・パワーシステムズ | Unit for connecting power cable, and connection method of power cable |
| JP2019221066A (en) | 2018-06-20 | 2019-12-26 | 昭和電線ケーブルシステム株式会社 | Cable connection part |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6412435U (en) * | 1987-07-13 | 1989-01-23 | ||
| JPH11266521A (en) * | 1998-03-16 | 1999-09-28 | Sumitomo Electric Ind Ltd | Power cable joint and its forming method |
-
2020
- 2020-04-28 JP JP2020079727A patent/JP7431658B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003009371A (en) | 2001-06-22 | 2003-01-10 | Mitsutoshi Watanabe | Power supply cable connector |
| JP2009106014A (en) | 2007-10-22 | 2009-05-14 | Viscas Corp | Power cable connecting part and conductor connecting pipe |
| JP2016012974A (en) | 2014-06-27 | 2016-01-21 | 株式会社ジェイ・パワーシステムズ | Unit for connecting power cable, and connection method of power cable |
| JP2019221066A (en) | 2018-06-20 | 2019-12-26 | 昭和電線ケーブルシステム株式会社 | Cable connection part |
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| JP2021175333A (en) | 2021-11-01 |
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