JP2002165345A - Anchor cover for wire and auxiliary anchor cover for the wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anchor cover for a wire and an auxiliary anchor cover for the wire so highly convenient as being capable of working even in a hot-line job and also capable of covering an anchor grip even if having different lengths. SOLUTION: The cover formed into a hollow shape and comprised of a pair of half cover bodies 2a, 2b, each of which is made of an insulating material and capable of being freely opened and closed by use of its side edge as a hinge 1, is configured such that: a wire inlet 6 is opened at the tip of the cover, and a wire outlet 7 for a wire installed along the rim is opened at the side edge of the rear end section; a half cover body 2a is mounted extending towards the rear from the position of the wire outlet 7 for the wire installed along the rim, and a half-cut cover body 10, which is the extended section 8, is successively mounted to the side edge of the same side of the pair of half cover bodies so as to be capable of being freely opened and closed via a hinge 9; an insulator inlet 11 is formed at the rear end of the half-cut cover body; and each of a fitting section 14a and a section being fitted 14b capable of mutually being fitted by a hot-line tool G is formed at only another side edge of each of the half cover bodies 2a, 2b including the half-cut cover body 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover to be attached to a retaining grip or the like for retaining an electric wire laid on an upper part of a power pole to an insulator. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover for a staying portion of an electric wire and an auxiliary cover for a staying portion, all of which can be performed by remote control of a live tool.

[0002]

2. Description of the Related Art Conventionally, for example, when a high-voltage electric wire is installed between utility poles by using a retaining grip, the retaining grip is attached to a thimble of a tension insulator attached to an arm bar and the retaining grip is covered. It winds around the electric wire from which the layer was peeled off so that the electric wire is retained. Then, a cover for an anchoring portion is attached to the tightened anchoring grip, which is an anchoring portion.

The retaining portion cover is made of an insulating material, and is provided with a plurality of hinge portions at appropriate positions on one side edge, and is formed in a hollow shape by a pair of cover halves which are opened and closed with the hinge portions as fulcrums. You. An electric wire introduction port is opened at the front end and an insulator introduction port is opened at the rear end, and a rising portion is provided at one position of the one side edge on the rear end side of the cover half. Is provided at this portion, and an opening for leading out an edge line is provided. Further, the pair of cover halves are provided with a plurality of engaging projections and engaging holes which can be engaged with each other at appropriate positions on one side edge provided with a hinge portion and the other side edge. Therefore, after tightening the retention grip around the electric wire and stretching the electric wire between the electric poles,
The retaining portion cover is attached to the retaining grip.

[0004]

However, in order to increase the efficiency of the work, it is desirable to work with the electric wires in a live state. For this reason, for example, when an operator rides on an aerial work vehicle, It is conceivable to use a hot-line tool having a grip portion provided with a pair of openable and closable arms at the tip end, for example, an insulated screw so that work can be performed safely by remote control from the side. In this case, after the clip is attached to the retaining clip while supporting the retaining portion cover with the gripping portion at the tip of the insulating cap, the engaging projections are also engaged with the respective engaging holes by the gripping portion. Since the opening / closing side of the gripping portion faces upward, the engaging projections and the engaging holes on the other side edge facing downward can be easily engaged with the insulating cap. However, since each engagement protrusion and each engagement hole on one side edge face upward, an operator operates the insulation protrusion from below to engage each engagement protrusion and each engagement hole with the grip portion. Even if they are to be combined, it is extremely difficult to pinch them and it is difficult to make them engage with each other. For this reason, it is the current situation that power is temporarily interrupted between utility poles for safety work, and workers are manually attaching the cover for the staying part. There was a strong call for a solution that could be done.

The length of the retaining portion cover is usually set to a predetermined length. Therefore, the length is enough to cover the part where the wire is stripped and the fastening grip that is wound around that part, but if the fastening grip is wound with the wire covered, There is also. In this case, the retaining grip is longer than the retaining grip because of the tightening force. Therefore, the length of the retaining cover is not sufficient, and the retaining cover alone is not sufficient. Was. Therefore, the present invention has been made to solve the above-mentioned problem, and it is possible to work safely in a live state and to cover any of the grips having different lengths, which is convenient for a cover for a wire end portion and a wire end. It is an object of the present invention to provide a part auxiliary cover.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, a cover for a retaining portion of an electric wire according to the present invention has a hollow shape formed by a pair of cover halves made of an insulating material and opened and closed with one side edge being a hinge portion. Formed at the front end, and at the one end of the rear end, an opening for leading the wire is opened, and one half of the cover is moved backward from the position for the leading wire. At the same time, a half-cover cover is connected to one side edge of the extension portion on the same side as the pair of cover halves via a hinge so as to be openable and closable, and an insulator introduction port is opened at a rear end thereof. Only the other side edge of each cover half including the half-cover cover body is provided with an engaging portion and an engaged portion which can be engaged with each other by the hot wire tool.

Also, a pair of cover halves made of an insulating material and opened and closed with one side edge as a hinge portion are formed in a hollow shape, an electric wire introduction port is opened at a front end thereof, and a rear end is formed at one side edge. Open the edging line outlet, and extend the cover half backward so that both side edges are open from the edging line outlet position. A sealing member that can be attached to one overlapping side edge is pivotally supported, an insulator inlet is opened at the rear end, and only the other side edge of each cover half can be engaged with each other by a live tool. And an engaged portion.

In any case, a pair of cover auxiliary halves made of an insulating material and opened and closed with one side edge as a hinge portion are formed in a hollow shape, an electric wire introduction port is opened at a front end portion, and the rear end portion is formed as described above. An electric wire having an engaging portion and an engaged portion which are connected to the distal end portion of the cover for the retaining portion of the electric wire in a communicating manner, and are provided only on the other side edge of each of the cover auxiliary halves with the engaging portion and the engaged portion which can be engaged with each other by the hot wire tool. An auxiliary cover for the retaining section can be used.

Further, in the cover for a retaining portion and the supplementary cover for a retaining portion of the electric wire, the projecting piece opposing the other side edge of each cover half or each cover auxiliary half along its longitudinal direction. And each of the protruding pieces has an L-shaped cross section which is in contact with each other and is formed in a hollow shape in which the inside communicates with the inside of the cover half, and a side wall of each of the protruding pieces is formed. It is preferable to attach a horizontally long sponge-like soft elastic material to the inner surface, and to provide countless comb-shaped notches on the bottom walls of the bottom walls.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Implementation of a cover for a wire retaining portion (hereinafter, simply referred to as a cover for a retaining portion) and an auxiliary cover for a cable retaining portion (hereinafter, simply an auxiliary cover for a retaining portion) according to the present invention will be described below. Will be described with reference to the drawings. 1 is a perspective view of the retaining portion cover, FIG. 2 is a perspective view of the same half-cover cover opened, FIG. 3 is a sectional view taken along line WW of FIG. 1, and FIG. 4 is a sectional view taken along line XX of FIG. The figures are shown respectively. The retaining portion cover A1 is made of a hard synthetic resin material, for example, hard polyethylene, and has insulating properties. A pair of cover halves 2a and 2b whose upper edge is a hinge portion 1 and whose lower edge is opened and closed is formed in a hollow shape. That is, each cover half 2a, 2b
Is formed in a semi-cylindrical shape with a straight line on the tip side from the approximate center,
The rear end side is formed in a substantially half-cone shape that extends in a trumpet shape, and the open sides come into contact with each other to form a cylindrical or conical shape. A rising portion 4 extends from the upper side of each of the half-cut cylindrical portions 3a and each of the half-cut cone portions 3b, and their edges are integrally formed to form the hinge portion 1.

The cylindrical portion, ie, the cylindrical portion 5
An electric wire introduction port 6 is opened at the tip of a. In addition, the conical portion, that is, the conical portion 5b, which is notched at the edge of the rising portion 4a that protrudes outward and has a large thickness, that is, the hinge portion 1, is provided with a circling line outlet 7 at this portion. Have been. In order to prevent a small animal from intruding into the periphery of the edging line outlet 7 from the gap with the drawn edging line H and to cause a short circuit accident, a gap is hardly formed around the edging line H. Innumerable comb-shaped cut pieces are provided. Reference numeral 4b denotes a plurality of raised ridges protruding in parallel to both side surfaces of the rising portion 4a to prevent the side wall of the rising portion 4a from being out of shape and to enhance shape retention. On the other hand, the one cover half 2a is continuously and integrally extended rearward from the position of the edging line outlet 7. A half-cover cover 10 is connected to one side edge of the extension 8 on the same side as the cover halves 2a and 2b via a hinge 9 so as to be openable and closable. An insulator inlet 11 is opened at the rear end where the cover body 10 is fitted. In addition, a concave ridge 10a and a convex ridge 5c that can engage with each other when they are fitted are provided in the circumferential direction on the inner peripheral surface of the distal end portion of the extending portion 8 and the outer peripheral surface of the rear end portion of the conical portion 5b. . This is to prevent the lateral displacement of the extended portion 8 when the extended portion 8 is covered.

A protruding piece 1 having a predetermined width opposes the other side edge of each of the cover halves 2a and 2b along the longitudinal direction.
2, 12 are extended. As shown in FIG. 3, each of the protruding pieces 12, 12 has an L-shaped cross section in contact with each other and has a hollow interior communicating with the cylindrical portion 5a or the conical portion 5b. A laterally long sponge-like soft elastic material 13 is adhered to the inner surface of each of the side walls 12a, 12a, and each of the bottom walls 12b is provided with an infinite number of comb-shaped cut pieces at the edges facing each other. This is a double protruding piece 12,
This is because the branch electric wire W can be drawn out from the area 12 as described later.

Further, a projecting piece 1 is provided on each of the cover halves 2a and 2b, the extension 8 and the other side edge of the half-cover cover 10.
The protruding pieces 14, including the parts 2 and 12, facing each other,
A plurality of engaging projections 14 are provided on each of the projecting pieces 14 on the side of the one cover half 2a as shown in FIG.
4a, and each projecting piece 14 on the other cover half 2b side.
Is provided with an engagement hole 14b as an engaged portion. The engaging projections 14a have bar-shaped tips, and the engaging holes 14b are circular holes. The engaging projections 14a can be engaged with each other by being clamped from the outside by an insulating yoke G which is a live wire tool described later. I have. Here, each of the protruding pieces 14, 14
Is provided only on the other side edge of each of the cover halves 2a and 2b.

An annular flange 15 is provided around the insulator inlet 11 so as to securely protect a charged portion d2 of the insulator D described later. Reference numeral 16 denotes a support piece protruding from each of the rising portions 4, and is used to hold the support piece with an insulating cap G. Reference numeral 17 denotes a ridge that protrudes annularly on the outer peripheral surface of the tip of each half-cylindrical portion 3a, 3a along a direction perpendicular to the axis thereof, and is used to connect a retaining portion auxiliary cover B described later to the tip. belongs to.

The retaining portion cover A1 according to the present invention has the above-described configuration, and the method of using the same will now be described. FIG. 5 shows a state where the retaining portion cover A1 is mounted above a utility pole (not shown), and FIG. 6 is a side sectional view showing the mounting procedure. In the figure, C denotes an arm fixed horizontally to a utility pole, and an insulator D (tensile insulator) is attached to the arm C. In the insulator D, a thimble d3 is provided at the tip of a metal support fitting d1 attached to the arm C via a charging portion d2, and a porcelain insulator d4 is mounted therebetween. E
Is a covered electric wire, a part of which is cut off to a predetermined length to expose a bare electric wire portion e1. The electric wire E is retained by winding a known retaining grip F inserted through the thimble d3 around the bare electric wire portion e1.

Therefore, in order to attach the retaining portion cover A1 to the retaining grip F, an operator rides on an aerial work vehicle (not shown) and ascends to the upper part of the utility pole to have a predetermined length. One or two publicly-known insulating screws G having a grip portion g1 having a pair of openable and closable arms at the distal end are used, and the support piece 16 is nipped and lifted by the grip portion g1. . Then, the retaining portion cover A1 is placed on the retaining grip F from the open side of the other side of the two cover halves 2a, 2b, and the two cover halves 2a, 2b are fitted together, and the electric wire E is inserted into the electric wire inlet 6. Further, the edging line H is drawn in from the rear end of the half-cone portion 3b and the front end of the semi-mounting cover body 10 and drawn out from the edging line outlet 7. Furthermore,
As shown in FIG. 6, the half-cover cover body 10 is put on the charging part d2 of the insulator D. In this state, the protruding pieces 14, 14 which are located only on the other side edges of the respective cover halves 2a, 2b, including the half-cover cover body 10, are individually clamped by the gripping portion g1 of the insulating Yoko G. The mating projection 14a and the engaging hole 14b are respectively engaged. In this way, the cover A1 for the staying portion can be attached by remote operation of only the insulating Yokoko G, so that the operation can be performed while the electric wire E is in a live state and can be performed safely.

FIG. 7 is a perspective view of a retaining portion cover according to another embodiment. Since the retaining portion cover A2 has substantially the same configuration as the retaining portion cover A1 according to the present embodiment, the same portions are denoted by the same reference numerals and detailed description thereof will be omitted. That is, in the retaining portion cover A2, the two cover halves 2a and 2b whose upper and lower edges are opened continuously from the position of the edging line outlet 7 are continuously and integrally extended. Insulator inlet 11 at the end of 18a, 18b
Is established. A rib 19 is projected from the upper end edge of each of the extending portions 18a and 18b so as to protrude outward along its longitudinal direction as shown in FIG.
Then, the support shaft 22 is inserted through a shaft hole 21 formed in a shaft support portion 20 which is an end of the extension portion 18a, 18b and protrudes near the upper end, so that the support shaft 22 can freely rotate around the support shaft 22. The moving sealing member 23 is axially mounted. The two extension portions 1
The upper edges of 8a and 18b need to be opened in order to guide the edging line H to the edging line outlet 7 from between them. Therefore, the shaft hole 21 on one extension portion 18b side has a diameter corresponding to the shaft diameter of the support shaft 22. Relatively large. The sealing member 23 is formed in a gate-like cross section, and is inclined so as to be firmly fitted to the ribs 19 only by pressing from above.

Therefore, in order to attach the cover A2 for the retaining portion to the retaining grip F, an operator rides on an aerial work vehicle and rises to the upper part of the telephone pole, and as in the present embodiment, the insulating member is insulated. The support piece 16 is sandwiched and lifted by the grip part g1 of the yatco G, and the retaining grip F is covered with the retaining part cover A2. Then, the two cover halves 2a and 2b are joined together, the electric wire E is inserted into the electric wire introduction port 6, and the edging line H is drawn in from the space between the upper ends of the extending portions 18a and 18b. , And pulled out from the edging line outlet 7. Further, the upper end edges of the two extending portions 18a and 18b correspond to FIG.
And the support shaft 22 is connected to one of the extending portions 18b.
The two extension portions 18a,
18b is put on the charging part d2 of the insulator D. Next, the protruding pieces 14 which are opposed to each other only on the other side edges of each of the cover halves 2a, 2b and the extending portions 18a, 18b are individually clamped by the gripping portion g1 of the insulating member G, and the engaging protrusions 14a are formed. And engagement hole 14
b. Further, as shown by the solid line in FIG. 8, the sealing member 23 is tilted from above with the gripping part g1 of the insulating yoke G, and the ribs 19 on the upper end edges of the extending parts 18a and 18b are formed.
To fit. In this way, the cover A2 for the staying portion can be attached by remote control of only the insulating Yokoko G, and the work can be safely performed while the electric wire E is in a live state.

Another branch line I from the electric wire E
May be added. In this case, the branch line I branched from the connector J provided on the electric wire E as shown in FIG.
Is rotated one turn at the position of the retaining grip F and pulled downward. When the retaining portion cover A is attached, the branch line I is pulled into the retaining portion cover A from the electric wire introduction port 6, and the other half of the half cut cylindrical portion 3a is removed. A pair of projecting pieces 12 provided on the side edges,
12 to pull it down. At this time, the branch line I is sandwiched between the soft elastic members 13 on the inner side of the side wall 12a, and the bottom wall 12b is formed by forming an infinite number of comb-shaped cut pieces at the edges facing each other. The branch line I can be drawn out with almost no opening between the protruding pieces 12 of the above, thereby preventing the invasion of small animals and preventing the occurrence of a short circuit accident. It is needless to say that the other cover A2 for retaining portion can be similarly implemented.

FIGS. 10 to 12 show an auxiliary cover B for a retaining portion used together with the retaining portion cover A1 (A2) according to each of the above embodiments. The electric wire E is one in which the covering portion is peeled off and the retaining grip F is wound around the bare electric wire portion e1. However, in this type of wire, water penetrates from the portion where the covering layer is peeled off, causing a disconnection accident, Charging section d2
Exposure could result in electric shock. Therefore, in order to solve this drawback and facilitate the work, there is a retaining grip F1 for retaining the covered electric wire. However, the fastening grip F1 has a longer tightening length dimension when tightened than the above-described grip, and the fastening portion cover A1 (A2) according to both embodiments has a shorter dimension. Therefore, an auxiliary cover B for a retaining portion is employed as a supplement to this.

The retaining portion auxiliary cover B is made of a hard synthetic resin material, for example, rigid polyethylene, like the retaining portion covers A1 and A2, and has insulating properties. A pair of cover auxiliary halves 25a and 25b whose upper edge is a hinge portion 24 and whose lower edge is opened and closed is formed in a hollow shape. That is, each cover auxiliary half 25a, 25b
Are formed in a straight half-cylindrical shape, and the open sides come into contact with each other to form a cylindrical shape.

An electric wire inlet 27 is formed at the front end of the cylindrical portion 26, and the rear end is covered with the cover A1 for the staying portion.
(A2) is connected to the leading end portion in a communicating manner. For this reason, two concave ridges 28 are fitted on the inner peripheral surface on the base end side of the cylindrical portion 26 on the ridge 17 provided on the outer peripheral surface of the cylindrical portion 5a of the retaining portion cover A1 (A2). 28 are provided. The purpose of this is to make it possible to freely adjust the length of the retaining portion auxiliary cover B by selecting one of the concave stripes 28, 28. Further, similarly to the cover A1 (A2) for the retaining portion, each of the cover auxiliary halves 25a, 25
Protruding pieces 12, 12 of a predetermined width facing each other along the longitudinal direction extend from the other side edge of 5b. Each of the protruding pieces 12, 12 has an L-shaped cross section which is in contact with each other and is in the form of a hollow communicating with the inside of the auxiliary cover halves 25a, 25b. Then, each side wall 12a, 1
A horizontally long sponge-like soft elastic material 13 is adhered to the inner surface of 2a, and each bottom wall 12b is provided with a number of comb-shaped cut pieces at the edges facing each other. This is to allow the branch electric wire W to be drawn out from between the two protruding pieces 12 in the same manner as described above.

Further, each of the cover auxiliary halves 25a, 25
On each other side edge of b, a plurality of protruding pieces 14, 14 including the protruding piece portions 12, 12 are provided so as to be opposed to each other, and each protruding piece 14 on the one side of the cover auxiliary half 25a is provided. An engagement protrusion 14a is provided as an engagement portion, and an engagement hole 14b as an engaged portion is formed in each of the projections 14 on the other cover half 25b side.
Is provided. The engaging projections 14a have bar-shaped tips, and the engaging holes 14b are circular holes. The engaging projections 14a can be engaged by being insulated from each other by the insulating jaws G. Here, each protruding piece 14, 1
Reference numeral 4 is provided only on the other side edge of each of the cover auxiliary halves 25a and 25b. 29 is both cover auxiliary halves 25a, 25
It is a support piece provided on the outer peripheral surface of b.

Therefore, the cover A1 (A2)
In a state in which the support half 29 is attached, the support piece 29 is sandwiched and lifted by the gripping portion g1 of the insulating yarn
The wire E is inserted into the wire inlet 27 while the wire E is inserted between the wires a and 25b. Further, as shown in FIGS. 11 and 12, the rear end portion of the auxiliary cover B for the retaining portion is attached to the distal end portion of the cover A1 (A2) for the retaining portion, and one of the concave stripes 28 is fitted to the ridge 17. I do. Furthermore, in this state,
The protruding pieces 14, 14 facing each other only on the other side edge of each of the cover auxiliary halves 25a, 25b are clamped one by one with the gripping part g1 of the insulating cap G, and the engaging projection 14a and the engaging hole 14b are formed.
Are respectively engaged. In this way, the auxiliary cover B for the anchoring portion can be attached by remote control of only the insulating Yokoko G, so that the operation can be performed while the electric wire E is in a live state and can be performed safely. Since the front end of the retaining section cover A1 (A2) and the rear end of the retaining section auxiliary cover B overlap each other, they can be fixed in a stable state.

When the retaining part auxiliary cover B is used, the retaining part auxiliary cover B can be inserted from the branch line I and pulled out from under the same as described above. In addition, the covers A1, A2 for the retaining portion and the auxiliary cover B for the retaining portion according to the present invention have been described as the covers of the retaining grip F. However, it is needless to say that the retaining covers can also be used as the cover of the retaining clamp.

[0026]

As described above, the retaining portion cover according to the present invention is provided with a hinge portion on one side edge of a pair of cover halves, and rims one of the cover halves rearward from the position of the circling line outlet. A half-cover cover is connected to one side edge of the extension portion on the same side as the pair of cover halves via a hinge portion so as to be freely openable and closable; Only the other side edge is provided with an engaging portion and an engaged portion that can be engaged with each other by the hot wire tool, or the cover half is moved rearward so that both side edges are opened from the edge turning line outlet position. It extends and supports a sealing member that can be attached to one side edge of the extension part by tilting the live part tool with the live part tool. Since it is configured to have an engaging portion and an engaged portion that can be engaged with each other, There will be can cover all without site that is not available, thereby wire cover anchor portion by remote control even while the active line state can be deposited on the anchor grips like. Further, not only the work is simplified, but also there is no need to temporarily stop the power between the power poles, so that there is an effect that the work efficiency is improved.

Also, since the auxiliary cover for the retaining portion can be connected to the cover for the retaining portion, it can be used for either the electric wire with the coating layer peeled off or the electric wire grip which is fastened to the electric wire which is not peeled off, which is convenient. .

Further, in the cover for a retaining portion and the supplementary cover for a retaining portion of the electric wire, a protruding piece portion facing the other side edge of each cover half or each cover auxiliary half is extended, Each of the projecting pieces has an L-shaped cross section facing each other and is formed hollow so that the inside communicates with the inside of the cover half, and a soft elastic material is attached to an inner surface of a side wall of each of the projecting pieces. Each bottom wall is provided with numerous comb-shaped notches at the edges where they abut each other, making it easy to pull out the branch line from the electric wire, and preventing the invasion of small animals and causing a short circuit accident. Is prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of a retaining portion cover according to the present invention.

FIG. 2 is a perspective view showing a state where the half-cut cover body is opened.

FIG. 3 is a sectional view taken along line WW in FIG. 1;

FIG. 4 is a sectional view taken along line XX in FIG. 1;

FIG. 5 is a perspective view showing an attached state of a retaining portion cover according to the present invention.

FIG. 6 is a side sectional view showing the mounting method.

FIG. 7 is a perspective view of a retaining portion cover according to another embodiment.

FIG. 8 is a side sectional view showing the operation of the essential part.

FIG. 9 is a sectional view taken along line YY in FIG. 8;

FIG. 10 is a perspective view of a retaining part auxiliary cover.

FIG. 11 is a perspective view showing the attached state.

FIG. 12 is a sectional view taken along the line ZZ in FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hinge part 2a, 2b Cover half body 6 Electric wire introduction port 7 Edge line lead-out port 8 Extension part 9 Hinge part 10 Half-cover cover body 11 Insulator introduction port 12 Ridge piece 12a Side wall 12b Bottom wall 13 Soft elastic material 14 Protrusion Piece 14a engaging portion (engaging protrusion) 14b engaged portion (engaging hole) 18a, 18b extending portion 23 sealing member 24 hinge portion 25a, 25b cover auxiliary half body 27 electric wire introduction port A1, A2 for retaining portion Cover B Auxiliary cover for retaining part E Electric wire G Hot wire tool

Claims (5)

[Claims] 1. A hollow body formed by a pair of cover halves made of an insulating material and opened and closed with one side edge being a hinge part, an electric wire introduction port is opened at a front end thereof, and a rear end is formed at one side edge thereof. Opening an edging line outlet, and extending one cover half rearward from the edging line outlet position and one side of the extension portion on the same side as the pair of cover halves. A half-cover cover is connected to the edge via a hinge so as to be openable and closable, an insulator inlet is opened at the rear end, and only the other side edge of each cover half including the half-cover cover is connected to each other by a hot-line tool. A cover for a retaining portion of an electric wire, wherein an engaging portion and an engaged portion that can be engaged are provided. 2. A hollow body is formed by a pair of cover halves made of an insulating material and opened and closed with one side edge being a hinge part. An electric wire introduction port is opened at the front end and a rear end is formed at one side edge. Open the edging line outlet, and extend the cover half backward so that both side edges are open from the edging line outlet position. A sealing member that can be attached to one overlapping side edge is pivotally supported, an insulator inlet is opened at the rear end, and only the other side edge of each cover half can be engaged with each other by a live tool. A cover for a retaining portion of an electric wire, comprising a portion and an engaged portion. 3. A projecting piece facing the other side edge of each cover half along the longitudinal direction thereof, and each projecting piece has an L-shaped cross section which faces and contacts each other. None, and the inside is formed hollow so as to communicate with the inside of the cover half, a laterally long sponge-like soft elastic material is adhered to the inner surface of the side wall of each protruding piece portion, and each bottom wall has an end facing each other. 3. The cover for an electric wire retaining part according to claim 1, wherein an innumerable comb-shaped notch is provided on an edge. 4. A hollow body formed by a pair of cover auxiliary halves made of an insulating material and opened and closed with one side edge being a hinge part, an electric wire introduction port is opened at a front end, and a rear end of the electric wire is retained. An engaging portion and an engaged portion which are connected to the leading end of the unit cover in a communicating manner, and which can be engaged with each other by the hot wire tool only on the other side edge of each cover auxiliary half are provided. Auxiliary cover for wire staying part. 5. An L-shaped cross-section in which a protruding piece facing the other side edge of each of the cover auxiliary halves extends along the longitudinal direction thereof, and each of the protruding pieces faces and contacts each other. And a hollow sponge-like soft elastic material is adhered to the inner surface of the side wall of each protruding piece, and the bottom wall protrudes from each other. 5. The auxiliary cover for an electric wire retaining part according to claim 4, wherein a number of comb-shaped cut pieces are provided at the mating edges.