JP2014241696A - Wire coating repair cover - Google Patents

Wire coating repair cover Download PDF

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JP2014241696A
JP2014241696A JP2013123789A JP2013123789A JP2014241696A JP 2014241696 A JP2014241696 A JP 2014241696A JP 2013123789 A JP2013123789 A JP 2013123789A JP 2013123789 A JP2013123789 A JP 2013123789A JP 2014241696 A JP2014241696 A JP 2014241696A
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core wire
repair cover
wire
length
longitudinal direction
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JP6093657B2 (en
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順三 武村
Junzo Takemura
順三 武村
正純 久世
Masazumi Kuze
正純 久世
哲生 黒井
Tetsuo Kuroi
哲生 黒井
慶和 内藤
Yoshikazu Naito
慶和 内藤
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Chubu Electric Power Co Inc
Meishin Electric Co Inc
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Chubu Electric Power Co Inc
Meishin Electric Co Inc
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Abstract

PROBLEM TO BE SOLVED: To provide a wire coating repair cover which secures a creepage distance for satisfying an insulation function by preventing positional dislocation in a length direction caused by variance in the length of a peeled interval where a core wire is exposed.SOLUTION: A wire coating repair cover 1 comprises: a cylinder part 2 which is formed from an insulative and flexible material and can be opened/closed by parting one location in a circumferential direction along a length direction; a coupling part 3 capable of coupling opening/closing surfaces Sa and Sb of the cylinder part 2; a core wire holding part 4; and a locking rib 5. The core wire holding part 4 is formed in a center in a length direction on an inner wall 21 of the cylinder part 2, capable of holding an exposed core wire and configured, such that an inner diameter is equal with an outer diameter of the core wire and a length corresponds to a minimum length in variance of a peeled interval. The locking rib 5 is provided along a length direction at both sides of the core wire holding part 4 in the length direction, positioned outside of a radial diameter of the core wire and inside of an outer diameter of an insulation coating in a natural state separated from the insulation coating when attached to a wire, and bent to the outside of the outer diameter of the insulation coating if interfered with the insulation coating.

Description

本発明は、架線工事が終了した後に電線の芯線が露出した箇所を被覆し補修する電線用被覆補修カバーに関する。   The present invention relates to an electric wire covering repair cover for covering and repairing a portion where a core wire of an electric wire is exposed after completion of overhead wire work.

従来、架線工事に用いられるバイパス工法では、電線の絶縁被覆の一部を剥がして露出させた芯線にバイパス電線やアース用電線を接続し、無停電状態で工事を行う。架線工事が終了した後、バイパス用電線やアース用電線を撤去し、芯線の露出箇所を被覆し絶縁するための補修をする。このとき、芯線の露出箇所の被覆補修に使用される被覆補修カバーとして、例えば特許文献1に記載のものが知られている。   Conventionally, in the bypass construction method used for overhead wire construction, a bypass wire and a ground wire are connected to the exposed core wire by peeling off a part of the insulation coating of the wire, and the construction is performed in an uninterruptible state. After the completion of the overhead wire work, remove the bypass wire and ground wire, and repair the insulation to cover and insulate the exposed portion of the core wire. At this time, for example, a cover described in Patent Document 1 is known as a cover repair cover used for covering repair of an exposed portion of the core wire.

特開平06−276640号公報Japanese Patent Laid-Open No. 06-276640

特許文献1の電線用被覆補修カバーでは、長手方向の中央部に、芯線の外径と同等の内径を有する芯線挟持部(特許文献1では「電線挟持部4」)が形成されている。露出した芯線が芯線挟持部に挟持されるように被覆補修カバーが取り付けられることで、被覆補修カバーの長手方向の中心に芯線が位置決めされる。また、互いに嵌合する突条と凹溝とが形成されることにより、絶縁機能を満足するための沿面距離が確保される。
以下、芯線が露出した区間を「剥線区間」という。芯線挟持部の長さは、想定される剥線区間のばらつきの最小長さに対応するように設定されることが好ましい。そうすれば、芯線挟持部の両端の段差が、両側の絶縁被覆の端部の間で位置決めされる。したがって、沿面距離が確保された範囲内に剥線区間が位置することとなる。
In the electric wire covering repair cover of Patent Document 1, a core wire holding portion (“electric wire holding portion 4” in Patent Document 1) having an inner diameter equivalent to the outer diameter of the core wire is formed at the center in the longitudinal direction. The covering repair cover is attached so that the exposed core wire is sandwiched by the core sandwiching portion, whereby the core wire is positioned at the center in the longitudinal direction of the covering repair cover. Further, by forming the protrusions and the concave grooves that are fitted to each other, a creeping distance for satisfying the insulating function is secured.
Hereinafter, a section in which the core wire is exposed is referred to as a “strip line section”. It is preferable that the length of the core wire clamping portion is set so as to correspond to the minimum length of variation of the assumed stripping section. If it does so, the level | step difference of the both ends of a core wire clamping part will be positioned between the edge parts of the insulation coating of both sides. Therefore, the stripped section is located within the range where the creepage distance is secured.

ところで、絶縁被覆の一部を剥がす作業は、作業者が高所に上って行う場合や、間接活線用の工具を操作して行う場合があり、作業者の技能や工具の差異によって、剥線区間の長さのばらつきが大きくなる可能性がある。
剥線区間の長さが、最小長さに比べて顕著に長くなると、芯線挟持部の両端の段差と絶縁被覆の端部との「あそび」が大きくなり、被覆補修カバーが剥線区間の片側にずれる可能性がある。この位置ずれ量が一定の値を超えると、剥線区間の一部が、沿面距離が確保された範囲から逸脱し、電線周りの絶縁機能が要求基準に対して不足するおそれがある。
By the way, the work to remove a part of the insulation coating may be performed when the worker goes up to a high place or by operating a tool for indirect hot wire, depending on the skill of the worker and the difference of the tool, There may be a large variation in the length of the stripped section.
If the length of the stripped section is significantly longer than the minimum length, the “play” between the steps on both ends of the core wire clamping part and the end of the insulation coating increases, and the covering repair cover is on one side of the stripped section. There is a possibility of shifting. If this amount of positional deviation exceeds a certain value, a part of the stripped section may deviate from the range in which the creepage distance is secured, and the insulation function around the electric wire may be insufficient with respect to the required standard.

この問題に対する対策として、例えば、想定される剥線区間の最大長さよりも被覆補修カバーの全長を十分に長くする方法や、芯線挟持部の長さが異なる複数種類の被覆補修カバーを準備しておき、補修する電線の剥線区間の長さに合わせて適当な被覆補修カバーを選択する方法が考えられる。しかし、被覆補修カバーの全長は他の制約によって制限されており、また、複数種類の被覆補修カバーを準備することは、作業者の作業を複雑にし、部品管理工数が増大するという不都合をもたらす。   As a countermeasure against this problem, for example, prepare a method for sufficiently increasing the total length of the covering repair cover beyond the maximum length of the assumed stripping section, and a plurality of types of covering repair covers with different lengths of the core pinching portion. A method of selecting an appropriate covering repair cover according to the length of the stripped section of the electric wire to be repaired can be considered. However, the overall length of the covering repair cover is limited by other constraints, and preparing a plurality of types of covering repair covers complicates the work of the operator and increases the number of parts management man-hours.

そこで、従来の被覆補修カバーの全長を大きく変えず、一種類の被覆補修カバーのみを使用するという前提での課題解決が求められる。
本発明は、上述の問題に鑑みてなされたものであり、その目的は、芯線が露出した剥線区間の長さのばらつきに起因する長手方向の位置ずれを防止し、絶縁機能を満足するための沿面距離を確保する電線用被覆補修カバーを提供することにある。
Therefore, there is a need to solve the problem on the premise that only one type of covering repair cover is used without greatly changing the overall length of the conventional covering repair cover.
The present invention has been made in view of the above-mentioned problems, and its purpose is to prevent longitudinal displacement due to the variation in the length of the stripped section where the core wire is exposed, and to satisfy the insulating function. An object of the present invention is to provide an electric wire covering repair cover that ensures a creepage distance.

本発明は、絶縁性且つ可撓性の材料で形成され、絶縁被覆の一部が剥がされ芯線が露出した電線に対し、当該芯線が露出した剥線区間を跨ぐように径外方向から取り付けられる電線用被覆補修カバーであって、筒部、結合部、芯線挟持部及び係止リブを備えることを特徴とする。
筒部は、周方向の一箇所が長手方向に沿って分断されて開閉可能であり、電線に取り付けられたとき内壁の内側に絶縁被覆を収容可能である。
結合部は、筒部において互いに対向する開閉面の双方に凹凸状に設けられ、互いに嵌合することで開閉面同士を結合可能である。
The present invention is formed from an insulating and flexible material, and is attached to the electric wire from which a part of the insulating coating is peeled off and the core wire is exposed from the radial direction so as to straddle the exposed wire section where the core wire is exposed. A covering repair cover for electric wires, comprising a cylindrical portion, a coupling portion, a core wire clamping portion, and a locking rib.
The cylindrical portion can be opened and closed by being cut along one longitudinal direction along the longitudinal direction, and can accommodate an insulating coating inside the inner wall when attached to the electric wire.
The coupling portion is provided in a concavo-convex shape on both the opening and closing surfaces facing each other in the cylindrical portion, and the opening and closing surfaces can be coupled to each other by being fitted to each other.

芯線挟持部は、筒部の内壁において長手方向の中央部に形成され、露出した芯線を挟持可能であって、内径が芯線の外径と同等であり、長さが剥線区間のばらつきの最小長さに対応するように設定されている。
係止リブは、芯線挟持部の長手方向の両側に長手方向に沿って設けられている。係止リブは、電線に取り付けられたとき、絶縁被覆と離間した自然状態では芯線の径外側且つ絶縁被覆の外径の内側に位置し、絶縁被覆と干渉すると絶縁被覆の外径の外側に撓む。
The core wire clamping portion is formed at the center portion in the longitudinal direction on the inner wall of the cylindrical portion, can hold the exposed core wire, has an inner diameter equal to the outer diameter of the core wire, and has a minimum variation in the stripped section. It is set to correspond to the length.
The locking rib is provided along the longitudinal direction on both sides in the longitudinal direction of the core wire sandwiching portion. The locking rib is positioned outside the core wire and inside the outer diameter of the insulation coating in a natural state separated from the insulation coating when attached to the electric wire, and bends outside the outer diameter of the insulation coating when it interferes with the insulation coating. Mu

この電線用被覆補修カバーは、補修する電線の剥線区間の長さがばらつきの最小長さに近いとき、従来技術と同様に、芯線挟持部のみによって芯線を挟持する。このとき、芯線挟持部の長手方向の両側に設けられた係止リブは、全て絶縁被覆の径外側に撓む。
一方、剥線区間の長さがばらつきの最小長さよりも係止リブの長さ以上長くなると、係止リブの一部又は全部が撓んだ状態から自然状態に戻ろうとして絶縁被覆の端部の内側に嵌り込み、絶縁被覆に係止する。これにより、被覆補修カバーの長手方向の位置が位置決めされる。
したがって、全長が従来の被覆補修カバーとほぼ同等の一種類の被覆補修カバーによって、剥線区間の長さのばらつきに関わらず、被覆補修カバーと剥線区間との長手方向の位置ずれを防止することができる。よって、電線周りの絶縁機能を満足することができる。
When the length of the stripped section of the electric wire to be repaired is close to the minimum variation, the electric wire covering / recovering cover holds the core wire only by the core wire holding portion, as in the prior art. At this time, all the locking ribs provided on both sides in the longitudinal direction of the core wire clamping portion are bent outward from the diameter of the insulating coating.
On the other hand, if the length of the stripping section is longer than the minimum length of the variation by the length of the locking rib, the end portion of the insulating coating tries to return to a natural state from a part or all of the locking rib being bent. And is locked to the insulation coating. Thereby, the position of the longitudinal direction of a covering repair cover is positioned.
Therefore, a single type of cover repair cover whose overall length is substantially equivalent to that of the conventional cover repair cover prevents positional displacement in the longitudinal direction between the cover repair cover and the stripped section regardless of variations in the length of the stripped section. be able to. Therefore, the insulation function around the electric wire can be satisfied.

本発明の一実施形態による電線用被覆補修カバーの(a)正面図、(b)底面図である。It is (a) front view and (b) bottom view of the covering repair cover for electric wires by one Embodiment of this invention. (a)図1(b)のIIa−IIa線断面図、(b)図1(a)のIIb−IIb線断面図である。(A) IIa-IIa sectional view taken on the line of FIG.1 (b), (b) IIb-IIb sectional view taken on the line of Fig.1 (a). 本発明の一実施形態による電線用被覆補修カバーを電線に取り付ける手順を示す径方向断面図である。It is radial direction sectional drawing which shows the procedure which attaches the covering repair cover for electric wires by one Embodiment of this invention to an electric wire. 図3(a)の(a)IVa方向矢視、(b)IVb方向矢視による長手方向断面斜視図である。It is a longitudinal cross-sectional perspective view by (a) IVa direction arrow of Fig.3 (a), (b) IVb direction arrow view. 本発明の一実施形態による電線用被覆補修カバーを剥線区間の長さが異なる電線に取り付けたときの作用を説明する説明図である。It is explanatory drawing explaining an effect | action when the covering repair cover for electric wires by one Embodiment of this invention is attached to the electric wire from which the length of a stripping area differs. 本発明の他の実施形態による電線用被覆補修カバーの径方向断面図である。It is radial direction sectional drawing of the covering repair cover for electric wires by other embodiment of this invention. 第1比較例の電線用被覆補修カバーを剥線区間の長さが異なる電線に取り付けたときの作用を説明する説明図である。It is explanatory drawing explaining an effect | action when attaching the covering repair cover for electric wires of a 1st comparative example to the electric wire from which the length of a stripping area differs. 第2比較例の電線用被覆補修カバーを剥線区間の長さが異なる電線に取り付けたときの作用を説明する説明図である。It is explanatory drawing explaining an effect | action when the covering repair cover for electric wires of a 2nd comparative example is attached to the electric wire from which the length of a stripping area differs.

以下、本発明の一実施形態による電線用被覆補修カバーを図面に基づいて説明する。
(一実施形態)
図1〜図4に示す電線用被覆補修カバー1は、絶縁性及び可撓性を有するポリエチレン等のエラストマー系樹脂材料で形成されており、絶縁被覆91の一部が剥がされ芯線93が露出した電線9を被覆し補修するために、径外方向から取り付けられるカバーである。
以下の説明で、芯線93が露出した区間を「剥線区間」という。剥線区間の長さは、絶縁被覆91を剥がす作業における作業者の技能や工具の差異によって所定の範囲でばらつくことを前提とする。
Hereinafter, an electric wire covering repair cover according to an embodiment of the present invention will be described with reference to the drawings.
(One embodiment)
1 to 4 is formed of an elastomeric resin material such as polyethylene having insulating properties and flexibility, and a portion of the insulating coating 91 is peeled off to expose the core wire 93. In order to cover and repair the electric wire 9, it is a cover that is attached from the radially outward direction.
In the following description, a section where the core wire 93 is exposed is referred to as a “strip line section”. It is assumed that the length of the stripping section varies within a predetermined range due to differences in operator skill and tools in the work of stripping the insulation coating 91.

被覆補修カバー1は、筒部2、結合部3、芯線挟持部4、係止リブ5等を備えている。
被覆補修カバー1の本体をなす筒部2は、周方向の一方が長手方向に沿って分断されており、分断された側と反対側の背部23を折り曲げ支点として、開閉面Sを開閉可能である。筒部2は、電線9に取り付けられたとき内壁21の内側に絶縁被覆91を収容する。筒部2の長手方向の中央部に設けられる芯線挟持部4と、両端の内壁21との境界には、段差22が形成されている。
筒部2の外壁には、長手方向の中央位置を示す「標識部」としての標識リブ24が周方向に形成されている。本実施形態では、長手方向の中心に対して対称に、計4本の標識リブ24が形成されている。
The covering repair cover 1 includes a cylindrical portion 2, a coupling portion 3, a core wire clamping portion 4, a locking rib 5, and the like.
The cylindrical part 2 which forms the main body of the covering repair cover 1 is divided in one circumferential direction along the longitudinal direction, and the opening / closing surface S can be opened and closed with the back part 23 opposite to the divided side as a bending fulcrum. is there. The cylinder part 2 accommodates the insulating coating 91 inside the inner wall 21 when attached to the electric wire 9. A step 22 is formed at the boundary between the core wire holding portion 4 provided at the longitudinal center of the tube portion 2 and the inner walls 21 at both ends.
On the outer wall of the cylindrical portion 2, a marker rib 24 as a “marker portion” indicating the center position in the longitudinal direction is formed in the circumferential direction. In the present embodiment, a total of four marking ribs 24 are formed symmetrically with respect to the center in the longitudinal direction.

結合部3は、対向する開閉面Sa、Sbの双方に凹凸状に設けられ、互いに嵌合することで開閉面S同士を結合する。本実施形態では、結合部3は、突条31及び凹溝32によって構成されている。詳しくは、被覆補修カバー1の長手方向の両端部を除く大半の範囲で、一方側の開閉面Sa、及び他方側の開閉面Sbに、互いに嵌合可能な突条31及び凹溝32が複数組対設されている。
突条31及び凹溝32が互いに嵌合することで、芯線93から結合部3の表面を通って電流が外部に到達する経路長が長くなる。したがって、被覆補修カバー1の絶縁機能を確保するための沿面距離が確保される。こうして、突条31及び凹溝32が対設された長手方向の範囲は、「良絶縁性範囲Z」を構成する。
The coupling portion 3 is provided in a concavo-convex shape on both of the opposed open / close surfaces Sa and Sb, and couples the open / close surfaces S by fitting each other. In the present embodiment, the coupling portion 3 is constituted by the protrusions 31 and the concave grooves 32. Specifically, in most of the range except for both ends in the longitudinal direction of the covering repair cover 1, there are a plurality of protrusions 31 and concave grooves 32 that can be fitted to each other on the one side opening / closing surface Sa and the other side opening / closing surface Sb. Pairs are installed.
When the protrusion 31 and the groove 32 are fitted to each other, the path length through which the current reaches the outside from the core wire 93 through the surface of the coupling portion 3 is increased. Therefore, the creeping distance for ensuring the insulating function of the covering repair cover 1 is ensured. Thus, the longitudinal range in which the protrusions 31 and the concave grooves 32 are opposed to each other constitutes a “good insulating range Z”.

また、図4(a)に示す開閉面Saにおける最下端の凹溝32の中央部には受け溝34が形成されており、図4(b)に示す開閉面Sbにおける最下端の突条31の中央部には受け溝34に嵌合可能な鉤状部33が形成されている。鉤状部33を受け溝34に嵌合することで、開閉面Sa、Sb同士がぴったりと結合される。これにより、一旦取り付けられた被覆補修カバー1が電線9から外れにくくなる。   Further, a receiving groove 34 is formed at the center of the lowermost concave groove 32 on the opening / closing surface Sa shown in FIG. 4 (a), and the lowermost protrusion 31 on the opening / closing surface Sb shown in FIG. 4 (b). At the center portion of this is formed a hook-like portion 33 that can be fitted into the receiving groove 34. By fitting the hook-shaped portion 33 into the receiving groove 34, the open / close surfaces Sa and Sb are tightly coupled to each other. Thereby, the covering repair cover 1 once attached becomes difficult to come off from the electric wire 9.

芯線挟持部4は、筒部内壁21の長手方向の中央部に設けられ、露出した芯線93を挟持する。芯線挟持部4の内径は芯線93の外径と同等である。また、図2(b)に示すように、芯線挟持部4の長さは、剥線区間のばらつきの最小長さに対応するように設定される。すなわち、剥線区間の長さがばらつきの最小長さのとき、芯線挟持部4は、芯線93が露出した範囲のほぼ全部を挟持する。   The core wire clamping part 4 is provided in the center part of the longitudinal direction of the cylinder part inner wall 21, and clamps the exposed core wire 93. FIG. The inner diameter of the core wire clamping portion 4 is equal to the outer diameter of the core wire 93. Further, as shown in FIG. 2B, the length of the core wire holding portion 4 is set so as to correspond to the minimum length of variation in the stripped section. That is, when the length of the stripped section is the minimum variation, the core wire clamping unit 4 clamps almost the entire range where the core wire 93 is exposed.

係止リブ5は、芯線挟持部4の長手方向の両側に長手方向に沿って、筒部内壁21から立設されている。係止リブ5は、絶縁被覆91と離間した自然状態では、芯線93の径外側、且つ絶縁被覆91の径内側に位置する。一方、係止リブ5は、絶縁被覆91と干渉したとき、絶縁被覆91に外接するように撓む。
特に本実施形態では、係止リブ5は筒部2と一体に成形されている。また、筒部2の背部23側の内壁21から、略直方体状の係止リブ5が立設されている。
The locking rib 5 is erected from the cylindrical portion inner wall 21 along the longitudinal direction on both sides in the longitudinal direction of the core wire sandwiching portion 4. The locking rib 5 is positioned outside the core wire 93 and inside the insulating coating 91 in a natural state separated from the insulating coating 91. On the other hand, the locking rib 5 bends so as to circumscribe the insulating coating 91 when it interferes with the insulating coating 91.
In particular, in this embodiment, the locking rib 5 is formed integrally with the cylindrical portion 2. Further, a substantially rectangular parallelepiped locking rib 5 is erected from the inner wall 21 on the back portion 23 side of the cylindrical portion 2.

さらに、係止リブ5は、芯線挟持部4の長手方向の両側に複数ずつ長手方向に沿って設けられている。例えば本実施形態では、片側に各6個の係止リブ5が設けられている。
ここで具体的な数値例を挙げて説明する。図2(b)に示すように、一例の被覆補修カバー1は、芯線挟持部4の長さXcが40mmであり、係止リブ5の両端間の長さXrが100mmである。複数の係止リブ5は、隣との隙間を含めて1個あたり約5mmに設定されており、長手方向の片側につき6個で約30mmの区間に設けられている。長さXcの意味については後述する。
係止リブ5の両端間の長さXrである100mmという長さは、剥線区間のばらつきの最大長さに相当する。また、この100mmの範囲すなわち係止リブ5の両端の位置は、結合部3による良絶縁性範囲Zに含まれている。
Further, a plurality of locking ribs 5 are provided along the longitudinal direction on both sides in the longitudinal direction of the core wire sandwiching portion 4. For example, in this embodiment, six locking ribs 5 are provided on one side.
Here, a specific numerical example will be given and described. As shown in FIG. 2B, in the example cover repair cover 1, the length Xc of the core wire sandwiching portion 4 is 40 mm, and the length Xr between both ends of the locking rib 5 is 100 mm. The plurality of locking ribs 5 are set to about 5 mm per one including a gap with the adjacent one, and are provided in a section of about 30 mm with six pieces on one side in the longitudinal direction. The meaning of the length Xc will be described later.
The length of 100 mm which is the length Xr between both ends of the locking rib 5 corresponds to the maximum length of the variation in the stripped section. Further, the range of 100 mm, that is, the positions of both ends of the locking rib 5 are included in the good insulating range Z by the coupling portion 3.

以上の構成による被覆補修カバー1を電線9に取り付けるとき、図3(a)に示すように、筒部2を開きながら電線9に被せる。そして、電線9の芯線93が芯線挟持部4に挿入されたら、突条31を凹溝32に嵌合させつつ筒部2を閉じる。このとき、長手方向の中央部で鉤状部33が受け溝34に嵌合する。これにより、被覆補修カバー1は電線9に固定される。   When the covering repair cover 1 having the above configuration is attached to the electric wire 9, as shown in FIG. And if the core wire 93 of the electric wire 9 is inserted in the core wire clamping part 4, the cylinder part 2 will be closed, making the protrusion 31 fit in the ditch | groove 32. FIG. At this time, the hook-shaped portion 33 is fitted into the receiving groove 34 at the central portion in the longitudinal direction. Thereby, the covering repair cover 1 is fixed to the electric wire 9.

すると、剥線区間では、図3(b)のように、芯線93が芯線挟持部4に挟持される。係止リブ5は、芯線93と干渉することなく、図の下方に向いた自然状態を保っている。
一方、剥線区間以外の区間では、図3(c)のように、絶縁被覆91は、筒部内壁21の内側に収容される。係止リブ5は、絶縁被覆91と干渉し、絶縁被覆91の径外側に接するように撓む。
Then, in the stripped section, the core wire 93 is sandwiched between the core wire sandwiching portions 4 as shown in FIG. The locking rib 5 maintains a natural state directed downward in the figure without interfering with the core wire 93.
On the other hand, in the sections other than the stripped section, the insulating coating 91 is accommodated inside the cylindrical portion inner wall 21 as shown in FIG. The locking rib 5 interferes with the insulating coating 91 and bends so as to be in contact with the radially outer side of the insulating coating 91.

次に、本実施形態の被覆補修カバー1の作用効果について、比較例と対比しつつ、図5、図7、図8を参照して説明する。
架線工事に用いられるバイパス工法では、工事を行う区間の両端で既設電線9の絶縁被覆91の一部を剥がし、芯線93の露出箇所同士をバイパス電線で接続して無停電状態で工事を行う。或いは、芯線93の露出箇所に一端が接続されたアース用電線の他端を電柱の腕金等に接続してアースを取る。工事終了後、芯線93からバイパス電線やアース用電線を外し、芯線93が露出した剥線区間を跨ぐように被覆補修カバー1を被せる。
被覆補修カバー1は、筒部2の径方向の一方が長手方向に沿って分断され開閉可能となっており、電線9の径外方向から取り付けることができる。また、筒部2を閉じたとき、結合部3の突条31及び凹溝32が互いに嵌合する範囲では、絶縁機能を満足するための沿面距離が確保される。
Next, the effect of the cover repair cover 1 of this embodiment is demonstrated with reference to FIG.5, FIG.7, FIG.8 contrasting with a comparative example.
In the bypass construction method used for the overhead line construction, a part of the insulation coating 91 of the existing electric wire 9 is peeled off at both ends of the section to be constructed, and the exposed portions of the core wire 93 are connected to each other by the bypass electric wire and the construction is performed in an uninterruptible state. Alternatively, the other end of the grounding wire, one end of which is connected to the exposed portion of the core wire 93, is connected to a brace or the like of a utility pole and grounded. After completion of the construction, the bypass electric wire and the grounding electric wire are removed from the core wire 93, and the covering repair cover 1 is put over the stripped section where the core wire 93 is exposed.
One of the radial directions of the cylinder part 2 is parted along the longitudinal direction, and the covering repair cover 1 can be opened and closed, and can be attached from the radially outward direction of the electric wire 9. Further, when the cylindrical portion 2 is closed, a creeping distance for satisfying the insulating function is ensured in a range where the protrusion 31 and the concave groove 32 of the coupling portion 3 are fitted to each other.

ところで絶縁被覆91の一部を剥がす作業においては、作業者や工具によって剥線区間の長さにばらつきが生じる。以下、上記の数値例に対応して、剥線区間の長さのばらつきを「最小40mm強、最大100mm強」と想定する。ここで、剥線区間の長さが「40mm強」とは、「通常の作業方法を考慮した技術常識に照らして、40mmの芯線挟持部4に容易に挿入可能であって、且つ、不要に長すぎない長さ」を意味する。その長さは、例えば約41mmかもしれないし、場合によっては約45mmかもしれない。
図5、図7、図8における「L=○○mm」という記載は、剥線区間の長さが、上記の解釈に基づく「○○mm強」であることを意味する。
By the way, in the operation | work which peels a part of insulation coating 91, dispersion | variation arises in the length of a stripped area with an operator or a tool. Hereinafter, in correspondence with the above numerical example, it is assumed that the variation in the length of the stripped section is “minimum 40 mm, maximum 100 mm”. Here, the length of the stripping section is “40 mm or more”, “in light of technical common sense considering a normal working method, it can be easily inserted into the 40 mm core wire clamping portion 4 and is unnecessary. It means “not too long”. The length may be about 41 mm, for example, and in some cases about 45 mm.
The description “L = ○ mm” in FIGS. 5, 7, and 8 means that the length of the stripped section is “slightly mm” based on the above interpretation.

一方、図5、図7、図8、及び上記図2における「Xc=△△mm」という記載は、芯線挟持部4の長さが「△△mmの剥線区間に対応する長さ」であることを意味する。実際の作業では絶縁被覆91の端面が凹凸状や斜めになることを想定し、芯線挟持部4の長さを理論値より短めに設定することが好ましい。例えば40mmの剥線区間に対応する芯線挟持部4の現実の長さは、35mm〜38mm程度に設定される。この場合の35mm〜38mm程度の芯線挟持部4の長さを、図中では「Xc=40mm」と示す。また、文中で「芯線挟持部4の長さXcが40mmである」というとき、長さXcは、実際には35mm〜38mm程度であるという意味である。   On the other hand, the description “Xc = ΔΔmm” in FIGS. 5, 7, 8, and 2 is “the length corresponding to the stripped section of ΔΔmm”. It means that there is. In actual work, it is preferable to set the length of the core wire clamping portion 4 shorter than the theoretical value, assuming that the end surface of the insulating coating 91 is uneven or oblique. For example, the actual length of the core wire holding part 4 corresponding to the 40 mm stripped section is set to about 35 mm to 38 mm. In this case, the length of the core wire clamping portion 4 of about 35 mm to 38 mm is indicated as “Xc = 40 mm” in the drawing. Further, in the text, when “the length Xc of the core wire sandwiching portion 4 is 40 mm”, the length Xc actually means about 35 mm to 38 mm.

図7に示す第1比較例の被覆補修カバー7、及び、図8に示す第2比較例の被覆補修カバー8は、本実施形態の被覆補修カバー1のように係止リブ5を有しない。第1比較例の被覆補修カバー7は、芯線挟持部4の長さXcが40mmであり、第2比較例の被覆補修カバー8は、芯線挟持部4の長さXcが100mmであるとする。   The covering repair cover 7 of the first comparative example shown in FIG. 7 and the covering repair cover 8 of the second comparative example shown in FIG. 8 do not have the locking rib 5 like the covering repair cover 1 of the present embodiment. The covering repair cover 7 of the first comparative example has a length Xc of the core wire holding portion 4 of 40 mm, and the covering repair cover 8 of the second comparative example has a length Xc of the core wire holding portion 4 of 100 mm.

図7(a)に示すように、剥線区間の長さLが40mm強である場合、第1比較例の被覆補修カバー7が長手方向に少しずれると、芯線挟持部4と筒部内壁21との段差22が絶縁被覆91の端部92に当接するため、被覆補修カバー7が位置決めされる。したがって、剥線区間は良絶縁性範囲Zに含まれるため、バイパス工法での架線工事終了後の電線周りの絶縁機能を満足する。   As shown in FIG. 7 (a), when the length L of the peeled section is a little over 40 mm, the core wire sandwiching portion 4 and the cylindrical portion inner wall 21 when the covering repair cover 7 of the first comparative example is slightly displaced in the longitudinal direction. Is in contact with the end portion 92 of the insulating coating 91, so that the covering repair cover 7 is positioned. Therefore, since the stripped section is included in the good insulating range Z, the insulation function around the electric wire after the completion of the overhead wire work by the bypass method is satisfied.

一方、図7(b)に示すように、剥線区間の長さLが100mm強であり、被覆補修カバー7を剥線区間に対して長手方向に均等に取り付けた場合、段差22と絶縁被覆91の端部92との間に、片側につき約30mmの「あそび」ができるため、被覆補修カバー7が外力によってずれる可能性が発生する。
そして、図7(c)に示すように、被覆補修カバー7が図の右方向へ約30mmずれたとき、図の左方向の区間Exでは、剥線区間の一部が良絶縁性範囲Zから逸脱することとなる。その結果、バイパス工法での架線工事終了後の電線周りの絶縁機能が不足するおそれがある。
On the other hand, as shown in FIG. 7B, when the length L of the stripped section is a little over 100 mm, and the covering repair cover 7 is evenly attached to the stripped section in the longitudinal direction, the step 22 and the insulating coating Since there is a “play” of about 30 mm on one side between the end portions 92 of 91, there is a possibility that the covering repair cover 7 is displaced by an external force.
Then, as shown in FIG. 7C, when the covering repair cover 7 is displaced by about 30 mm in the right direction in the figure, in the section Ex in the left direction in the figure, a part of the stripped section is from the good insulating range Z It will deviate. As a result, there is a risk that the insulation function around the electric wire after the completion of the overhead wire work by the bypass method will be insufficient.

また、図8(a)に示すように、剥線区間の長さLが100mm強である場合、芯線挟持部4の長さXcが100mmである第2比較例の被覆補修カバー8は、長手方向に位置決めされる。
しかし、剥線区間の長さLが100mmより短い場合、例えば図8(b)に示すように剥線区間の長さLが40mm強である場合には、大径の絶縁被覆91が芯線挟持部4に乗り上げることとなる。そのため、被覆補修カバー8は筒部2が閉じられず、電線9に固定することができなくなる。
このように、係止リブ5を有しない第1、第2比較例では、剥線区間の長さのばらつきが比較的大きい場合、芯線挟持部4の長さを一律に設定しようとすると、何らかの不都合が生じることとなる。
Further, as shown in FIG. 8A, when the length L of the stripped section is slightly more than 100 mm, the covering repair cover 8 of the second comparative example in which the length Xc of the core wire clamping portion 4 is 100 mm is long Positioned in the direction.
However, when the length L of the stripped section is shorter than 100 mm, for example, when the length L of the stripped section is slightly more than 40 mm as shown in FIG. We will ride on part 4. For this reason, the cylindrical repairing cover 8 cannot be fixed to the electric wire 9 because the cylindrical portion 2 is not closed.
As described above, in the first and second comparative examples that do not have the locking rib 5, if the length variation of the stripped section is relatively large, if the length of the core wire holding portion 4 is set uniformly, Inconvenience will occur.

次に、係止リブ5を有する本実施形態の被覆補修カバー1について図5を参照する。
図5(a)に示すように、剥線区間の長さLが40mm強である場合、芯線93は、長さXcが40mmである芯線挟持部4に挟持される。このとき、全ての係止リブ5は、絶縁被覆91の外径の外側に撓み、電線9に対する係止には用いられない。この状態で被覆補修カバー1は、第1比較例の被覆補修カバー7と同様、段差22と絶縁被覆91の端部92との位置関係によって位置決めされる。
Next, FIG. 5 is referred with respect to the covering repair cover 1 of the present embodiment having the locking rib 5.
As shown to Fig.5 (a), when the length L of a stripping area is 40 mm or more, the core wire 93 is clamped by the core wire clamping part 4 whose length Xc is 40 mm. At this time, all the locking ribs 5 bend to the outside of the outer diameter of the insulating coating 91 and are not used for locking to the electric wires 9. In this state, the covering repair cover 1 is positioned by the positional relationship between the step 22 and the end portion 92 of the insulating covering 91 as in the covering repair cover 7 of the first comparative example.

図5(b)に示すように、剥線区間の長さLが70mm強であって被覆補修カバー1が剥線区間に対して長手方向に均等に取り付けられた場合、芯線挟持部4の両側において、片側につき約15mmの区間に対応する3個の係止リブ5が絶縁被覆91の外径の内側に入り込み、絶縁被覆91の端部92に対して被覆補修カバー1を係止する。つまり、段差22に代わり、中央側から3番目の係止リブ5の端面が絶縁被覆91の端部92に当接することにより、被覆補修カバー1は、長手方向の位置ずれが防止される。   As shown in FIG. 5 (b), when the length L of the stripped section is a little over 70 mm and the covering repair cover 1 is evenly attached to the stripped section in the longitudinal direction, both sides of the core wire clamping portion 4 3, three locking ribs 5 corresponding to a section of about 15 mm per side enter inside the outer diameter of the insulating coating 91, and lock the covering repair cover 1 to the end 92 of the insulating coating 91. That is, instead of the step 22, the end surface of the third locking rib 5 from the center side contacts the end 92 of the insulating coating 91, so that the covering repair cover 1 is prevented from being displaced in the longitudinal direction.

また、図5(c)に示すように、剥線区間の長さLが100mm強であって被覆補修カバー1が剥線区間に対して長手方向に均等に取り付けられた場合、芯線挟持部4の両側において、片側につき約30mmの区間に対応する6個の係止リブ5が絶縁被覆91の外径の内側に入り込み、絶縁被覆91の端部92に対して被覆補修カバー1を係止する。この場合、最も端部側にある係止リブ5の端面が絶縁被覆91の端部92に当接することにより、被覆補修カバー1は、長手方向の位置ずれが防止される。
以上のように本実施形態の被覆補修カバー1は、係止リブ5が機能する範囲において、剥線区間の長さのばらつきに関わらず、作業時に取り付けられた位置からずれることなく保持される。
Moreover, as shown in FIG.5 (c), when the length L of a stripping area is a little over 100 mm and the covering repair cover 1 is equally attached to the stripping section in the longitudinal direction, the core wire clamping part 4 On both sides, six locking ribs 5 corresponding to a section of about 30 mm per side enter inside the outer diameter of the insulating coating 91 and lock the covering repair cover 1 against the end 92 of the insulating coating 91. . In this case, the end face of the locking rib 5 on the most end side comes into contact with the end portion 92 of the insulating coating 91, so that the cover repair cover 1 is prevented from being displaced in the longitudinal direction.
As described above, the covering repair cover 1 according to the present embodiment is held without being displaced from the position where it is attached during work, regardless of variations in the length of the stripped section, within the range in which the locking rib 5 functions.

筒部2の外壁には、被覆補修カバー1の長手方向の中央位置を示す標識リブ24が形成されている。これにより、作業者は、標識リブ24の位置を目視又は手の感触で確認しながら、被覆補修カバー1を剥線区間に対して長手方向に均等に取り付けることができる。
したがって、通常の注意力を有する作業者が、第1比較例についての図7(c)のように、被覆補修カバー1を剥線区間に対して極端に片側に偏って取り付ける可能性は無いと言ってよい。
よって、本実施形態の被覆補修カバー1を使用すれば、電線9の剥線区間は常に良絶縁性範囲Zに含まれることとなり、バイパス工法での架線工事終了後の電線周りの絶縁機能を満足することができる。
On the outer wall of the cylindrical portion 2, a marker rib 24 indicating the center position in the longitudinal direction of the covering repair cover 1 is formed. Thereby, the operator can attach the covering repair cover 1 equally to the stripped section in the longitudinal direction while confirming the position of the marker rib 24 visually or by hand.
Therefore, there is no possibility that an operator having normal attention power attaches the covering repair cover 1 extremely biased to one side with respect to the stripped section as shown in FIG. 7C for the first comparative example. I can say that.
Therefore, if the covering repair cover 1 of the present embodiment is used, the stripped section of the electric wire 9 is always included in the good insulating range Z, and satisfies the insulating function around the electric wire after the completion of the overhead wire construction by the bypass method. can do.

(その他の実施形態)
(ア)上記実施形態では、図3(b)に示すように、係止リブ5は、筒部2の背部23側の内壁21から立設されている。この形態に限らず、例えば図6に示すように、係止リブ6は、図の側方若しくは斜め側方の筒部内壁21から図の横方向に立設されてもよい。
(イ)芯線挟持部の長さ、係止リブの形状、数、又は両端間の長さ等の諸元は、上記実施形態の例に限らない。また、係止リブを筒部2と一体成形する形態に限らず、別部品の係止リブを筒部に接合する形態としてもよい。
(Other embodiments)
(A) In the said embodiment, as shown in FIG.3 (b), the latching rib 5 is standingly arranged from the inner wall 21 by the side of the back part 23 of the cylinder part 2. As shown in FIG. For example, as shown in FIG. 6, the locking rib 6 may be erected in the lateral direction of the figure from the cylindrical inner wall 21 on the side or the oblique side of the figure.
(A) Specifications such as the length of the core wire sandwiching portion, the shape and number of the locking ribs, or the length between both ends are not limited to the example of the above embodiment. Moreover, it is good also as a form which joins not only the form which integrally forms a locking rib with the cylinder part 2, but the locking rib of another component to a cylinder part.

(ウ)標識リブ24の形状や数は、上記実施形態の例に限らない。また、筒部2の長手方向の中央位置を示す「標識部」として、標識リブ24以外に、段差、溝等の形態を採用してもよい。
以上、本発明はこのような実施形態に限定されるものではなく、発明の趣旨を逸脱しない範囲において、種々の形態で実施することができる。
(C) The shape and number of the marker ribs 24 are not limited to the example in the above embodiment. Further, as the “marking portion” indicating the center position in the longitudinal direction of the cylindrical portion 2, a form such as a step, a groove, or the like may be adopted in addition to the marking rib 24.
As mentioned above, this invention is not limited to such embodiment, In the range which does not deviate from the meaning of invention, it can implement with a various form.

1 ・・・(電線用)被覆補修カバー、
2 ・・・筒部、
21・・・内壁、
3 ・・・結合部、
4 ・・・芯線挟持部、
5、6・・・係止リブ、
9 ・・・電線、
91・・・絶縁被覆、
93・・・芯線。
1 ... (for electric wire) cover repair cover,
2 ... cylinder part,
21 ... inner wall,
3 ... coupling part,
4 ... Core wire clamping part,
5, 6 ... locking ribs,
9: Electric wire,
91 ... Insulation coating,
93: Core wire.

Claims (5)

絶縁性且つ可撓性の材料で形成され、絶縁被覆(91)の一部が剥がされ芯線(93)が露出した電線(9)に対し、当該芯線が露出した剥線区間を跨ぐように径外方向から取り付けられる電線用被覆補修カバー(1)であって、
周方向の一箇所が長手方向に沿って分断されて開閉可能であり、電線に取り付けられたとき内壁(21)の内側に前記絶縁被覆を収容可能な筒部(2)と、
前記筒部において互いに対向する開閉面(S)の双方に凹凸状に設けられ、互いに嵌合することで前記開閉面同士を結合可能な結合部(3)と、
前記筒部の内壁において長手方向の中央部に形成され、露出した前記芯線を挟持可能であって、内径が前記芯線の外径と同等であり、長さが前記剥線区間のばらつきの最小長さに対応するように設定された芯線挟持部(4)と、
前記芯線挟持部の長手方向の両側に長手方向に沿って設けられ、電線に取り付けられたとき、前記絶縁被覆と離間した自然状態では前記芯線の径外側且つ前記絶縁被覆の外径の内側に位置し、前記絶縁被覆と干渉すると前記絶縁被覆の外径の外側に撓む係止リブ(5、6)と、
を備えることを特徴とする電線用被覆補修カバー。
The wire (9) is formed of an insulating and flexible material, part of the insulation coating (91) is peeled off and the core wire (93) is exposed, and the diameter is so as to straddle the stripped section where the core wire is exposed. An electric wire covering repair cover (1) attached from the outside,
A cylindrical portion (2) that can be opened and closed by being divided along the longitudinal direction at one place in the circumferential direction, and capable of accommodating the insulating coating inside the inner wall (21) when attached to the electric wire;
A coupling portion (3) that is provided in an uneven shape on both of the opening and closing surfaces (S) facing each other in the cylindrical portion, and is capable of coupling the opening and closing surfaces by fitting with each other;
The inner wall of the cylindrical portion is formed at the center in the longitudinal direction and can hold the exposed core wire, the inner diameter is equal to the outer diameter of the core wire, and the length is the minimum variation of the stripped section. A core pinching portion (4) set to correspond to the height,
Provided along the longitudinal direction on both sides in the longitudinal direction of the core wire sandwiching portion and attached to the electric wire, in a natural state separated from the insulation coating, it is located outside the outer diameter of the core wire and inside the outer diameter of the insulation coating And a locking rib (5, 6) that bends outside the outer diameter of the insulating coating when it interferes with the insulating coating;
A covering repair cover for electric wires, comprising:
前記係止リブは、複数が連なって設けられていることを特徴とする請求項1に記載の電線用被覆補修カバー。   The covering repair cover for electric wires according to claim 1, wherein a plurality of the locking ribs are provided continuously. 前記係止リブは、長手方向の両端の位置が、前記結合部が形成される範囲に含まれることを特徴とする請求項1または2に記載の電線用被覆補修カバー。   The covering repair cover for an electric wire according to claim 1 or 2, wherein positions of both ends in the longitudinal direction of the locking rib are included in a range where the coupling portion is formed. 前記係止リブは、前記筒部と一体に成形されていることを特徴とする請求項1〜3のいずれか一項に記載の電線用被覆補修カバー。   The said covering rib is shape | molded integrally with the said cylinder part, The covering repair cover for electric wires as described in any one of Claims 1-3 characterized by the above-mentioned. 前記筒部は、長手方向の中央位置を示す標識部(24)が外壁に形成されていることを特徴とする請求項1〜4のいずれか一項に記載の電線用被覆補修カバー。   The said pipe | tube part has the marker part (24) which shows the center position of a longitudinal direction in the outer wall, The covering repair cover for electric wires as described in any one of Claims 1-4 characterized by the above-mentioned.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020114037A (en) * 2019-01-08 2020-07-27 関西電力株式会社 Insulation cover

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JPS5226999U (en) * 1975-08-16 1977-02-25
JPH06276640A (en) * 1993-03-15 1994-09-30 Chubu Electric Power Co Inc Covering mending cover for electric wire
JPH0716518U (en) * 1993-08-09 1995-03-17 西日本電線株式会社 Insulation cover for repairing needle electrode marks
JPH11136829A (en) * 1997-10-29 1999-05-21 Nishi Nippon Electric Wire & Cable Co Ltd Repair cover for through hole in insulating coat of aerial insulated distribution line
JP2010268577A (en) * 2009-05-13 2010-11-25 Asahi Electric Works Ltd Cover for electric wire, and fixing method of insulating cover
JP2013027058A (en) * 2011-07-14 2013-02-04 Asahi Electric Works Ltd Insulation cover for overhead distribution line

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5226999U (en) * 1975-08-16 1977-02-25
JPH06276640A (en) * 1993-03-15 1994-09-30 Chubu Electric Power Co Inc Covering mending cover for electric wire
JPH0716518U (en) * 1993-08-09 1995-03-17 西日本電線株式会社 Insulation cover for repairing needle electrode marks
JPH11136829A (en) * 1997-10-29 1999-05-21 Nishi Nippon Electric Wire & Cable Co Ltd Repair cover for through hole in insulating coat of aerial insulated distribution line
JP2010268577A (en) * 2009-05-13 2010-11-25 Asahi Electric Works Ltd Cover for electric wire, and fixing method of insulating cover
JP2013027058A (en) * 2011-07-14 2013-02-04 Asahi Electric Works Ltd Insulation cover for overhead distribution line

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020114037A (en) * 2019-01-08 2020-07-27 関西電力株式会社 Insulation cover
JP7212883B2 (en) 2019-01-08 2023-01-26 関西電力株式会社 insulating cover

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