JP2007288884A - Insulating protective cover, insulating protective structure, and method of attaching the insulating protective cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To insulate and protect the exposed part of a conductor regardless of the form of a cable connection. <P>SOLUTION: This insulating protective cover 10 is equipped with a resinous cover body 11, and a stopper 12 provided in the cover body 11. The cover body 11 is made into a shape of rectangular bellows that expand and contract longitudinally. The cover body 11 is bent in tubular form in the longitudinal direction as its axial direction, and is closed by abutting mutually against the other long sides by stoppers 12. The cover body 11 is provided with a rectangular thin part 16, which extends longitudinally and is thinner than the cover body 11. Each end 17 of the tube of the cover body 11 is throttled by the thin part 16, thereby making the diameter of the end 17 smaller than the diameter of the center 18 of the tube of the cover body 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an insulation protection cover, an insulation protection structure, and an insulation protection cover mounting method for covering a conductor exposed portion of an overhead distribution line.

2. Description of the Related Art Conventionally, a linear insulating protective cover that covers a conductor exposed portion in an electric wire connecting portion of an overhead distribution line is known (for example, see Patent Document 1). The conductor exposed portion is a portion in which the conductors exposed by stripping off the insulating coatings at the tips of the plurality of electric wires are electrically connected by a connection sleeve such as an H sleeve. In order to electrically insulate and protect the exposed conductor portion to ensure electrical safety, an insulating protective cover is placed on the exposed conductor portion. The insulating protective cover includes a cylindrical cover body made of an insulating resin material, and electric wire openings opened at both ends of the cover body.
JP 2001-309541 A

  The insulation protective cover opens the insertion part provided on the side of the cover body, inserts the conductor exposed part, and inserts the conductor exposed part so that the wires extending from the conductor exposed part pass through the respective wire openings. It is comprised so that a part may be closed. However, some of the electric wire connecting portions are portions in which the electric wires are bent and extend from the conductor exposed portions. If an attempt is made to attach a linear insulating protective cover as in Patent Document 1 to such a portion, the shape does not match, the insertion portion of the cover body may open, and the exposed conductor portion may be exposed. If birds or the like come into contact with the exposed conductor exposed parts in this way, there is a risk of causing a distribution line accident.

  This invention is made | formed in view of this point, The place made into the objective is to carry out insulation protection of the conductor exposed part irrespective of the shape of an electric wire connection part.

  An insulating protective cover according to the present invention is an insulating protective cover that covers a conductor exposed portion of an aerial distribution line, and is a rectangular cover that is formed in a bellows shape that expands and contracts in the longitudinal direction of the rectangle. And a fastening portion that is provided on the cover body and is bent into a cylindrical shape in which the longitudinal direction of the rectangle is the axial direction, and closes the long sides of the rectangle butting each other. A thin-walled portion that extends in the longitudinal direction of the rectangle and is thinner than the thickness of the cover main body, each end of the cylinder of the cover main body is squeezed by the thin-walled portion, and the diameter of the end of the cover main body is It is comprised so that it may become smaller than the diameter of the center part of a pipe | tube.

  In the insulation protection structure for an electric wire connection part according to the present invention, in aerial distribution lines, a plurality of electric wires whose conductors are covered with an insulating coating and the conductors that are exposed by stripping off the insulating coating at the tip of the electric wires are electrically connected to each other. An electrical wire connection portion insulation protection structure comprising a conductor exposed portion connected to the insulation protection cover according to any one of claims 1 to 4, wherein the cover body has an axial direction of a cylinder. The conductor exposed portion is accommodated in the central portion, and both end portions of the cylinder of the cover main body are narrowed down and overlapped with the electric wires extending from the conductor exposed portion.

  According to said structure, a cover main body is deform | transformed by extending / contracting, cutting | disconnecting, bending, etc., and a cover main body is matched with the shape and magnitude | size of a conductor exposure part. The conductor exposed portion is accommodated in the cover body, and the cover body is closed by the fastening portion. Each end of the cylinder of the cover main body is narrowed down, and the diameter of each end is made smaller than the diameter of the central part of the cylinder of the cover main body, and is superposed on each electric wire extending from the exposed conductor. Each end part of the cover body is narrowed down by folding the thin part of each end part and overlapping the end parts with each other, or splitting the thin part of each end part and overlapping the end pieces. . As a result, the conductor exposed portion is covered with the insulating protective cover to provide insulation protection.

  The method for attaching an insulating protective cover to the first conductor exposed portion according to the present invention is the insulating protective cover according to any one of claims 1 to 4, wherein the length of the cover body in the longitudinal direction of the rectangle is One or more conductor exposed portions electrically connecting conductors exposed by stripping off the insulating coatings at the tips of a plurality of wires covered with insulating coatings or longer than the length of the wire connecting portion A step of preparing an insulating protective cover, a step of bending the cover main body into a cylindrical shape in which the longitudinal direction of the rectangle is an axial direction, and enclosing the conductor exposed portion in an axial central portion in the cover main body; And the process of closing the cover main body with the fastening part and narrowing down both ends of the cover main body to overlap the electric wire extending from the conductor exposed part.

  According to said structure, the length of a cover main body is contrasted with the length of a conductor exposed part, and the length of a cover main body is adjusted by expansion-contraction and cutting | disconnection etc. When the wire connecting portion has one conductor exposed portion, the length adjustment is such that the cover body has a plurality of conductor exposed portions so that the cover body is longer than the conductor exposed portion. The cover body is made longer than the length of the lined parts. In addition, an electric wire connection part is the part which connected the some electric wire by the conductor exposed part, and was electrically connected. The conductor exposed portion is accommodated in the cover body, and the cover body is closed by the fastening portion. Each end of the cylinder of the cover main body is narrowed down, and the diameter of each end is made smaller than the diameter of the central part of the cylinder of the cover main body, and is superposed on each electric wire extending from the exposed conductor. As a result, the conductor exposed portion is covered with the insulating protective cover to provide insulation protection.

  The method for attaching an insulating protective cover to the second conductor exposed portion according to the present invention is the insulating protective cover according to claim 3, wherein the length of the cover body in the longitudinal direction of the rectangle is 25 cm or more. A step of preparing a cover, a step of cutting one place between the plurality of fitting members of the cover body in a direction perpendicular to the longitudinal direction of the rectangle, and adjusting a length of the cover body; and the cover The main body is bent into a cylindrical shape with the longitudinal direction of the rectangle as the axial direction, and the insulating coating at the tip of a plurality of electric wires covered with the insulating coating is stripped and exposed at the axial central portion in the cover main body. A step of enclosing a conductor exposed portion in which the conductors are electrically connected to each other, a step of abutting the long sides of the rectangle and closing the cover body by fitting the fitting member, and both ends of the cover body Narrow the Extending from the exposed portion and a step of superimposing on the wire.

  According to said structure, the length of a cover main body is 25 cm or more, and the insulation protection cover 15 cm or more longer than the length of a conductor exposed part is prepared. Thereby, it becomes an insulation protective cover which can cover a conductor exposed part and a part of electric wire extended from the conductor exposed part and covered with the insulating film. The length of the cover body is compared with the length of the conductor exposed portion, and one position between the plurality of fitting members of the cover body is cut to adjust the length of the cover body. The conductor exposed portion is accommodated in the cover body, and the cover body is closed by the fastening portion. Each end of the cylinder of the cover main body is narrowed down, and the diameter of each end is made smaller than the diameter of the central part of the cylinder of the cover main body, and is superposed on each electric wire extending from the exposed conductor. As a result, the conductor exposed portion is covered with the insulating protective cover to provide insulation protection.

  According to the present invention, the conductor exposed portion can be insulated and protected regardless of the shape of the wire connecting portion.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  The insulation protective cover 10 according to the embodiment of the present invention covers and protects the conductor exposed portion 22 of the wire connecting portion 20 in the overhead distribution line 1 shown in FIG. The overhead distribution line 1 is an electric line that carries electricity sent from a power station or a substation, and includes an electric pole 2, an electric wire 4 installed between the electric poles 2, an insulator for insulatingly supporting the electric wire 4, and the like. The electric wire connection part 20 branches to the main line of the electric wire 4 as shown in FIG. 6 and FIG. 7, and the connection part 20a which connects and electrically connects the some electric wire 4 as shown in FIG. 4 and FIG. A branching portion 20b for connecting the line 4d. Also, as shown in FIG. 8, a plurality of conductor exposed portions 22 are provided side by side as in the case where the electric wire 4 extending from one of the conductor exposed portions 22 described later is cut and reconnected for construction, inspection, or the like. The insulating protective cover 10 is also used in the connecting portion 20a.

  As shown in FIGS. 2 and 3, the insulating protective cover 10 is provided with a resin cover body 11 which is rectangular and is bent into a cylindrical shape whose longitudinal direction is the axial direction. The cover body 11 is bent so that the cross section becomes an elliptical shape. The cover body 11 is formed in a bellows shape that expands and contracts in the rectangular longitudinal direction. An opening 11 a is formed by both long sides of the cover body 11. The insulating protective cover 10 includes a fastening portion 12 provided on the cover main body 11. The fastening portion 12 is configured to close the cover main body 11 with the long sides of the rectangle abutting each other, that is, close the opening 11 a of the cover main body 11.

  Specifically, the fastening portion 12 is a fitting member 13 provided on both long sides in the vicinity of the opening 11 a of the cover body 11. The fitting member 13 includes a first fitting member 14 and a second fitting member 15 that form a set. The first fitting member 14 is provided on one side of the long side of the cover body 11, and has a fitting protrusion 14a formed at the lower part and a fitting convex part 14b formed at the upper part. The second fitting member 15 is provided on the other side of the long side of the cover body 11, and has a fitting hole 15a provided in the lower part and a fitting concave part 15b provided in the upper part. The first fitting member 14 and the second fitting member 15 are fitted so that the fitting protrusion 14a and the fitting hole 15a are fitted, and the fitting convex portion 14b and the fitting concave portion 15b are fitted. It has become. A plurality of fitting members 13 are provided at intervals in the longitudinal direction of the rectangle of the cover body 11. The pair of first fitting members 14 and second fitting members 15 are respectively provided at the same position in the longitudinal direction of the rectangle on both long sides of the cover body 11. Since the fastening part 12 is comprised by the fitting member 13, the opening part 11a of the cover main body 11 can be easily closed only by making the 1st fitting member 14 and the 2nd fitting member 15 fit. .

  The cover body 11 is provided with a thin portion 16 that extends in the longitudinal direction of the rectangle and is thinner than the thickness of the cover body 11. The thin-walled portion 16 is configured with two small dents formed to face the outer side surface and the inner side surface of the cylinder of the cover body 11. Three thin portions 16 are provided at equal intervals in the rectangular short side direction of the cover body 11. Each end portion 17 of the cover body 11 is narrowed down by the thin portion 16 so that the diameter of each end portion 17 is smaller than the diameter of the central portion 18 of the cylinder of the cover body 11. Specifically, each end portion 17 of the cover main body 11 is narrowed down by bending the thin portion 16 of each end portion 17 and overlapping portions of the end portions 17 with each other. The diameter is smaller than the diameter of the central portion 18.

  It is preferable that the thin part 16 is provided in two or more places and eight places or less at intervals in the short side direction of the rectangle of the cover main body 11. If only one thin portion 16 is provided, the cover main body 11 is difficult to bend, so that each end portion 17 is difficult to narrow down. On the other hand, when nine or more thin portions 16 are provided, the rigidity of the central portion 18 of the cover main body 11 becomes insufficient, and it becomes difficult to maintain the cylindrical shape.

  The insulating protective cover 10 is formed in two sizes depending on the type of the electric wire 4. In the larger insulating protective cover 10, the distance L1 in the longitudinal direction of the rectangle of the cover body 11 on which the fitting member 13 is provided is 180 mm. Further, the inner diameter of the cover body 11 of the larger insulating protective cover 10 is formed such that the elliptical minor axis L2 is 40 mm and the major axis L3 is 55 mm. The smaller insulating protective cover 10 is formed so that L1 is 150 mm, L2 is 35 mm, and L3 is 40 mm.

  In an aerial distribution line 1, a part of which is shown in FIG. 1, upper and lower arm brackets 3 a and 3 b extending in the horizontal direction are attached to the upper part of a utility pole 2. The lower arm metal 3b is attached at a twisted position with respect to the upper arm metal 3a. One end of each of upper and lower main wires 4a and 4b, which are electric wires 4 installed between the utility pole 2 and another utility pole (not shown), is connected to both ends of the upper and lower arm brackets 3a and 3b. .

  One end of each upper main line 4a is insulated by two upper insulators 6a disposed on the upper arm metal 3a side and an upper tension clamp 7a provided continuously to the upper insulator 6a, so that the upper arm metal 3a It is connected. Similarly, one end of each lower main line 4b is insulated by two lower insulators 6b and a lower tension clamp 7b and connected to the lower arm metal 3b.

  In order to electrically connect each upper main line 4 a and each lower main line 4 b, the upper tension clamp 7 a and the lower tension clamp 7 b are connected to each other by an edge-circulating electric wire 4 c that is the electric wire 4. The upper main line 4a side and the lower main line 4b side of the peripheral wire 4c are connected by a conductor exposed portion 22 (shown in FIG. 2), which will be described later, and the conductor exposed portion 22 is covered with an insulating protective cover 10.

  As shown in FIGS. 4 to 8, the overhead distribution line 1 includes electric wires such as the connecting portion 20 a (shown in FIGS. 4, 5, and 8) and the branch portion 20 b (shown in FIGS. 6 and 7). A connecting portion 20 is provided. The insulation protection structure of the wire connection portion 20 is configured by the electric wire 4, the conductor exposed portion 22, and the insulation protection cover 10. The electric wire 4 is configured by covering a conductor 23 with an insulating film 24. The conductor exposed portion 22 is a portion where the conductors 23 exposed by stripping off the insulating coating 24 at the tip end portion of the electric wire 4 are electrically connected by the connection sleeve 25. As shown in FIG. 7, in the branch part 20b, the conductor 23 of the branch line 4d is connected with the other electric wire 4 as a main line. By covering the conductor exposed portion 22 with the insulating protective cover 10, the electric wire connecting portion 20 is insulated and protected.

  A conductor exposed portion 22 is accommodated in the central portion 18 of the cylinder of the cover main body 11 of the insulating protective cover 10. The opening 11 a corresponding to the central portion 18 of the cover body 11 is closed by fitting the first fitting member 14 and the second fitting member 15. As described above, both end portions 17 of the cover body 11 are narrowed down by bending the thin portion 16 and overlapped with the electric wire 4 extending from the conductor exposed portion 22. Since the cover main body 11 is provided with the thin-walled portion 16, the cover main body 11 is easily bent, so that each end portion 17 can be easily narrowed down.

  As shown in FIG. 1, the electric wire connecting portion 20 is also provided on the edge-around electric wire 4 c that electrically connects the two electric wires 4. At this time, the peripheral wire 4c and the like may be curved. Even in such a case, since the cover body 11 is formed in a bellows shape, the conductor exposed portion 22 can be accommodated. That is, since the cover main body 11 can be bent according to the shape of the electric wire connection part 20, the opening part 11a can be closed by the fitting member 13 without exposing the conductor exposed part 22 from the opening part 11a. Further, the both ends 17 of the cover main body 11 are narrowed down and overlapped with the electric wire 4 so that the both ends 17 of the cover main body 11 can also be closed, so that the conductor exposed portion 22 is surrounded and insulated by the insulating protective cover 10. The electrical safety of the wire connection part 20 can be ensured.

  An insulating tape material 26 (shown in FIGS. 4 and 6) is wound from above the both ends 17 of the cylinder of the cover body 11 to the electric wires 4 outside the both ends 17. Thereby, since the adhesiveness of the both ends 17 of the cover main body 11 and the electric wire 4 increases, infiltration of rainwater can be suppressed, the waterproofness of the insulation protective cover 10 can be improved.

  Next, a method for attaching the insulating protective cover 10 to the conductor exposed portion 22 will be described.

  First, as the larger insulating protective cover 10, a cover body 11 having a rectangular length L4 in the longitudinal direction of 30 cm is prepared. In the smaller insulating protective cover 10, a cover having L4 of 25 cm is prepared. The insulating protective cover 10 according to the embodiment of the present invention is not a fixed-size object that is sized to accommodate one conductor exposed portion 22, but is manufactured in advance to be long. For this reason, it can respond to the electric wire connection part 20 which has one conductor exposure part 22, and the electric wire connection part 20 which has two or more conductor exposure parts 22, Regardless of the length of the electric wire connection part 20, conductor exposure The part 22 can be insulated and protected.

  And the length of the electric wire connection part 20 which is going to attach the insulation protection cover 10 and the length L4 of the cover main body 11 are contrasted. As shown in FIG. 5 or FIG. 7, in the case of the electric wire connection part 20 with one conductor exposed part 22, the length L <b> 4 of the cover main body 11 is, for example, 15 cm longer than the length of the conductor exposed part 22. Next, the length of the cover body 11 is adjusted. Further, as shown in FIG. 8, in the case of the wire connecting portion 20 in which a plurality of conductor exposed portions 22 are arranged, the length of the cover body 11 is, for example, 15 cm longer than the total length of the plurality of conductor exposed portions 22. Adjust the height. Thereby, since it can cover even a part of the electric wire 4 extending from the conductor exposed portion 22 and covered with the insulating coating 24, the insulating protective cover 10 capable of reliably performing the insulation protection of the electric wire connecting portion 20 and can do.

  Adjustment of the length of the cover main body 11 can be easily performed by expansion and contraction, cutting, or the like of the cover main body 11. For this reason, the insulation protection cover 10 matched with the length of the electric wire connection part 20 can be prepared. The cover body 11 is cut by cutting one place between the plurality of fitting members 13 in a direction perpendicular to the axial direction of the cylinder. Note that the vertical direction here does not have to be a vertical direction in a strict sense.

  Next, the shape of the cover main body 11 is matched with the shape of the wire connection part 20. Even when the electric wire 4 is bent and extended from the conductor exposed portion 22 and attached to the electric wire connecting portion 20, the cover main body 11 is formed in a bellows shape, so that the cover main body 11 is bent to match the shape of the electric wire connecting portion 20. be able to. As described above, according to the shape and size of the electric wire connecting portion 20, it is possible to deal with various electric wire connecting portions 20 with one type of insulating protective cover 10 without manufacturing various types of insulating protective covers. Therefore, the manufacturing cost of the insulating protective cover 10 can be reduced.

  Next, the opening 11a of the cover main body 11 is opened, and the conductor exposed portion 22 is inserted from the opening 11a.

  The conductor exposed portion 22 is accommodated in the central portion 18 of the cover main body 11, and the opening portion 11 a corresponding to the central portion 18 is closed by fitting of the fitting member 13. Since the cover main body 11 is matched with the shape of the electric wire connection part 20, the opening part 11a can be closed without exposing the conductor exposed part 22. FIG.

  Next, the both ends 17 of the cover main body 11 are narrowed down, and the inner diameters L2 and L3 of each end 17 are made smaller than the inner diameters L2 and L3 of the central portion 18 and overlap the electric wires 4 extending from the conductor exposed portion 22. . Specifically, the thin portion 16 of the end portion 17 of the cover body 11 is bent, the cover body 11 is bent, and the end portions 17 are overlapped with each other to narrow down the end portion 17. At this time, since the length L4 of the cover main body 11 is adjusted to be 15 cm longer than the length of the conductor exposed portion 22, the both ends 17 of the cover main body 11 can be narrowed down while accommodating the conductor exposed portion 22. it can.

  By narrowing both ends 17 of the cover body 11 and closing both ends, the conductor exposed portion 22 is surrounded by the insulating protective cover 10 and insulated and protected, thereby ensuring the electrical safety of the wire connecting portion 20. it can.

  Finally, the insulating tape material 26 is wound from above the both ends 17 of the cover body 11 over the electric wires 4 outside the both ends 17. As a result, the degree of adhesion between the both ends 17 of the cover body 11 and the electric wire 4 is increased, the electrical safety of the electric wire connecting portion 20 can be further increased, and the intrusion of rainwater can be suppressed. The waterproofness of the cover 10 can be improved.

  In addition, the above-mentioned embodiment is an illustration of this invention, Comprising: This invention is not limited to this example.

  For example, the following configuration may be used.

  That is, in the above-described embodiment, a plurality of sets of the fitting members 13 are provided at intervals in the longitudinal direction of the rectangle of the cover body 11, but only one set may be provided.

  Moreover, in the said embodiment, although the cover main body 11 was bent so that a cross section might become elliptical shape, it is not limited to this shape.

  Moreover, in the said embodiment, although the thin part 16 shall be comprised with two small dents formed facing the outer side surface and inner side surface of the cylinder of the cover main body 11, an outer side surface or an inner side You may comprise with one dent formed in either one of the side surfaces.

  In the above embodiment, each end portion 17 of the cylinder of the cover body 11 is formed by bending the thin portion 16 of each end portion 17 and overlapping a part of the end portion 17. It may be narrowed down by, for example, overlapping the split and divided end pieces.

  Moreover, in the said embodiment, although the insulation protective cover 10 whose length L4 of a cover main body is 25 cm or 30 cm was prepared, it is not limited to this length, L4 should just be 25 cm or more.

  Moreover, in the said embodiment, although the length L4 of the cover main body 11 is adjusted so that it may become 15 cm longer than the length of the conductor exposed part 22, it is not limited to this length, What is necessary is just 15 cm or more.

  As described above, the present invention is useful for the insulation protection cover, the insulation protection structure, the method for attaching the insulation protection cover, and the like because the conductor exposed portion can be insulated and protected regardless of the shape of the wire connection portion.

It is a perspective view which shows a part of overhead transmission line. It is a side view of the insulation protection cover concerning the embodiment of the present invention. It is the III-III sectional view taken on the line of FIG. It is a side view which shows the connection part which attached the insulation protective cover. FIG. 5 is a cross-sectional view corresponding to the line VV in FIG. 3 at the connection portion in FIG. 4. It is a side view which shows the branch part which attached the insulation protective cover. FIG. 5 is a cross-sectional view corresponding to the line VV in FIG. 3 at the branch portion in FIG. 6. FIG. 5 is a cross-sectional view corresponding to the line V-V of FIG. 3 in a connection portion where two conductor exposed portions are arranged with an insulating protective cover attached.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Overhead distribution line 4 Electric wire 10 Insulation protective cover 11 Cover main body 12 Fastening part 13 Fitting member 16 Thin part 17 End part 18 Central part 20 Electric wire connection part 22 Conductor exposure part 23 Conductor 24 Insulation film 25 Sealing material

Claims (12)

An insulating protective cover that covers the exposed conductor of the overhead distribution line,
A resin-made cover body that is rectangular and has a bellows shape that expands and contracts in the longitudinal direction of the rectangle;
A fastening portion that is provided on the cover body and is bent into a cylindrical shape in which the longitudinal direction of the rectangle is an axial direction, and closes the long sides of the rectangle butting each other,
With
The cover body is provided with a thin portion that extends in the longitudinal direction of the rectangle and is thinner than the thickness of the cover body,
An insulating protective cover in which each end portion of the cylinder of the cover main body is narrowed down by the thin-walled portion, and the diameter of the end portion is smaller than the diameter of the central portion of the cylinder of the cover main body. The insulation protective cover according to claim 1,
Each end of the cylinder of the cover main body is an insulating protective cover in which the thin portion is bent and a part of the end overlaps and is narrowed down. The insulation protective cover according to claim 1,
An insulating protective cover which is a fitting member which is provided with a plurality of sets of the fastening portions on both long sides of the cover main body at intervals in the longitudinal direction of the rectangular shape and is fitted to each other. The insulation protective cover according to claim 1,
The said thin part is an insulation protective cover provided in 2 or more places and 8 places or less at intervals in the short side direction of the said rectangle. In the overhead distribution line, a plurality of wires whose conductors are covered with an insulating film,
A conductor exposed portion in which the conductors exposed by stripping off the insulating coating at the tip of the wire are electrically connected;
An insulating protective cover according to any one of claims 1 to 4,
Insulation protection structure of the electric wire connection part constituted by
The conductor exposed portion is accommodated in the axial center portion of the cylinder of the cover body,
An insulation protection structure for an electric wire connection portion, wherein both ends of the cylinder of the cover body are narrowed down and overlapped with the electric wires extending from the conductor exposed portion. In the insulation protection structure of the wire connection part of claim 5,
An insulation protection structure for an electric wire connecting portion in which an insulating tape material is wound from both ends of the cylinder of the cover main body to the electric wire outside the both end portions. 5. The insulating protective cover according to claim 1, wherein a length of the cover body in the longitudinal direction of the rectangle is such that a conductor is covered with an insulating film, and the insulating film is peeled off at the tip ends of the plurality of electric wires. A step of preparing an insulating protective cover that is longer than the length of one or more conductor exposed portions electrically connecting the exposed conductors;
Bending the cover body into a cylindrical shape in which the longitudinal direction of the rectangle is the axial direction, and including the conductor exposed portion in the axially central portion in the cover body;
A process of closing the long sides of the rectangle and closing the cover body with the fastening portion;
Squeezing both ends of the cover body and overlapping the wire extending from the conductor exposed portion;
A method for attaching an insulating protective cover to a conductor exposed portion comprising: In the method for attaching an insulating protective cover to the conductor exposed portion of claim 7,
The step of preparing the insulating protective cover includes preparing the insulating protective cover having a length of the cover main body of 25 cm or more, and then cutting one portion of the cover main body in a direction perpendicular to the longitudinal direction of the rectangle. A method for attaching an insulating protective cover to a conductor exposed portion for adjusting the length of the cover body. A step of preparing the insulating protective cover according to claim 3, wherein the length of the cover body in the longitudinal direction of the rectangle is 25 cm or more;
Cutting one place between the plurality of fitting members of the cover body in a direction perpendicular to the longitudinal direction of the rectangle, and adjusting the length of the cover body;
The cover body is bent into a cylindrical shape in which the longitudinal direction of the rectangle is the axial direction, and the insulation coating at the ends of the plurality of electric wires whose conductors are covered with the insulation coating is peeled off at the axial center in the cover body. Including a conductor exposed portion electrically connecting the exposed conductors;
A process of closing the long sides of the rectangle and closing the cover body by fitting the fitting member;
Squeezing both ends of the cover body, and overlapping the wire extending from the conductor exposed portion;
A method for attaching an insulating protective cover to a conductor exposed portion comprising: In the method for attaching an insulating protective cover to the conductor exposed portion of claim 7,
The step of preparing an insulating protective cover in which the length of the rectangle of the cover main body in the longitudinal direction is longer than the length of the wire connection portion is 15 cm or more longer than the length of the conductor exposed portion. How to attach the insulation protective cover to the conductor exposed part to be lengthened. In the method of attaching an insulating protective cover to the conductor exposed portion of claim 9,
The step of adjusting the length of the cover main body is a method of attaching an insulating protective cover to a conductor exposed portion in which the length of the cover body in the longitudinal direction of the rectangle is longer than the length of the conductor exposed portion by 15 cm or more. In the method for attaching an insulating protective cover to the conductor exposed portion according to claim 7 or 9,
A method for attaching an insulating protective cover to a conductor exposed portion, further comprising a step of winding an insulating tape material from both ends of the cover main body to the electric wire outside the both ends.

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