JP5111831B2 - Electric wire replacement method and construction yoke used in the replacement method - Google Patents

Description

  The present invention relates to a method for replacing an electric wire in a hanging wire method using a number of suspension wheels, which is adopted when replacing an existing two-wire electric wire stretched between two steel towers with a new wire. The present invention relates to a construction yoke used in the re-covering method.

  A number of electric wires are stretched by each steel tower, and as shown in FIG. 11, these electric wires C are stretched by the armature e of each steel tower E via the insulator string 6 and the insulator string yoke 4. ing. When performing such re-covering work of the electric wires C, if a scaffold cannot be constructed under these electric wires C, a hanging method is adopted. In this suspension method, a number of suspension wheels having gold wheels at both ends of a rope are suspended from branch lines such as electric wires C and wires stretched between steel towers E at intervals. This is a construction method in which the electric wire C is replaced and extended through the electric wire C or the like.

  As such, in the insulator series yoke, between the two existing wires, two semi-gold wheels were suspended to temporarily fix the existing wires, and then the existing wires were attached. Install a vernier fitting at the location, attach the existing wire to this vernier fitting, move the semi-gold wheel to this vernier fitting, and then peel off one of the wires and pull it to the center of the continuous yoke, There is a method of replacing the electric wire by using a hanging metal method.

As another example, a temporary array yoke is rotatably provided in front of the insulator continuous yoke, the two wire end support portions are moved from the insulator continuous yoke to the temporary array yoke, and the temporary array yoke is rotated. In this state, the suspension portion of the lower wire end is removed from the temporary arrangement yoke, and the upper wire is used as a parent wire, and a number of suspension wheels are arranged with a space between these wires. There is a method of drawing a lower wire while supporting the lower wire, and simultaneously extending a new wire previously connected to the other end of the lower wire.
JP 2005-295682 A

  However, in the former construction method, the temporary fixing of the existing electric wires has to be changed many times, which is troublesome. In addition, there is a risk that the two sets of semi-metal wheels come into close contact with each other and may be damaged. In the latter method, when the temporary arrangement yoke is rotated vertically based on the insulator continuous yoke and the lower electric wire is pulled, the upper electric wire is used as a parent wire, so that the upper electric wire is tensioned. Are pulled forward, which causes each insulator of the insulator string to fall forward. At that time, adjacent insulators may collide and be damaged. Therefore, it is conceivable to take measures such as pulling the upper part of the vertically arranged temporary yoke with the wire from the arm of the opposite steel tower that is not the side that pulls the electric wire. It takes time, and when the temporary arrangement yoke is rotated, the wire must be removed and rotated. Moreover, the operation | work which attaches or removes such a wire becomes very complicated.

  Therefore, in the present invention, when performing the work of replacing the two wires by the above-described suspension metal construction method, the wire serving as a parent wire is supported at the center of the front end edge of the continuous yoke, and twisted into an insulator, etc. It is an object of the present invention to provide an electric wire refurbishing method that can be safely repositioned without applying a biased load, and a work yoke used in the renewal method.

According to the first aspect of the present invention, in the rehanging method using a large number of suspension wheels, which is performed when rewiring an electric wire stretched between steel towers, two strip insulators connected to the steel tower are attached to the rear edge. And a square insulator series yoke having two existing wires attached to the front end edge thereof, on both side edges of the insulator series yoke perpendicular to the existing line and a central portion of the front end edge, and A part of the existing line protrudes from the existing line, and a substantially plate-shaped construction yoke is overlaid and attached, and a suspension wheel is attached to each of the two existing lines with a large number of intervals. The semi-metal wheels are respectively attached to the projecting portions on both sides of the steel wire, and the two existing wires are pulled and temporarily supported by one end of the linear body wound around the semi-metal wheels.

The temporary support was two rows of the existing line disconnecting each of said insulators connecting yoke, the end of the detached one of the existing lines, supported by attaching the projecting portion of the front edge of the construction yoke, the two rows of the existing The temporary support of the wire by each of the linear bodies is released, and the separated existing wire is suspended by the plurality of suspension wheels along the lower side of the existing wire , and the front end edge of the construction yoke is projected. One existing line supported by the section is used as a parent line for the above-described suspension method, and the other existing line is removed by pulling the other existing line through the plurality of suspension wheels, and the new line connected to the rear end of the other existing line The line is extended, and then the new line and the one existing line are provisionally supported by the linear bodies wound around the semi-metal wheels.

Remove one end of the one existing line from the projecting part of the front end edge of each construction yoke, and attach and support one end of the new line to the projecting part of the front end edge of the construction yoke . and new lines, then the temporary support of the respective linear member by new lines of one of the existing line and the temporary supporting the respective releasing said the one of the existing line along the lower side of the new line of the temporary support for is suspended by a number of Tsukin car, the one of the existing lines new line as a new parent lines of the temporary support for the rear end of the existing lines with removing the existing line to pull through the many Tsukin car and Nobesen the connected new line, then the a new line and the newly line of the temporary support for the parent line and each temporary support by the linear body wrapped in the semi-metal cars, one end of said new line taken to the continuous yoke insulator as a new line which is a formal support With supports, one end of the new line of temporary support for the the parent line supports attached to the insulator string yoke as new line to be formally supporting the removed from the protruding portion of the front edge of the construction yoke, Furthermore, the wire replacement method was used to release the temporary support of the new line , which is the official support of the Article 2, by the linear bodies wound around the semi-metal wheels.

According to a second aspect of the present invention, there is provided the electric wire repositioning method according to the first aspect, wherein two substantially L-shaped plate bodies are provided to face each other, and each of the upper portions of the substantially L-shaped upper portions of the two plate bodies is provided. A horizontally long metal fitting is attached between the front edges to connect and fix the opposing front edges to one side of the approximately L-shaped bent protruding edge of one of the two plates. Further, a construction yoke having a projecting tip projecting portion is provided.

In the above-mentioned wire replacement method, the two rectangular plates of the above-mentioned construction yoke are arranged on one side of the existing square-shaped insulator series yoke, to which two strips are attached, perpendicular to the two existing lines . The retaining bracket is protruded from the one side edge of the insulator continuous yoke, and the tip protruding portion of the construction yoke is protruded from the front end edge of the insulator continuous yoke to the insulator continuous yoke. Similarly, another similar construction yoke is attached to the other side of the insulator series yoke.

Each semi-metal wheel is attached to the retaining part on the side where the existing electric wire is located of each retaining metal fitting attached to each construction yoke, and one existing line serving as the parent line or a new line for temporary support 2. The wire replacement method according to claim 1, wherein one end of the wire is attached to and supported by a front end protruding portion of each construction yoke protruding from the front end edge at a center portion of the front end edge of the insulator continuous yoke. A construction yoke was used.

  According to the first aspect of the present invention, the construction yoke that can be easily attached to the existing insulator series yoke is used, and the construction yoke is attached to both sides of the existing insulator series yoke by projecting a part thereof. Since the existing two wires are temporarily supported on the outside of the continuous yoke, there is no need for complicated wire transfer as in the conventional work, and the parent wire in the hanging method is removed. Since it is supported at the central portion of the front end edge of the continuous yoke, it is possible to perform the wire re-installation work easily and in a short time in a state in which the two strips of the electric wire are connected to the insulator. Further, since the two wires are not rotated, the extra tension applied to the parent wire can be suppressed, so that the insulators of the insulator string are not damaged by falling forward.

  In addition, because the construction yokes are attached to both sides of the existing insulator series yokes, and the construction yokes are respectively attached, and the semi-metal wheels that temporarily support the two existing wires are provided separately from the outside of the series yokes. The distance between the tension clamp of each electric wire and each semi-metal wheel can be increased, and damage due to these contacts can be prevented, and each semi-metal wheel is positioned outside the left and right side of the chain yoke. Therefore, they do not contact each other and are not damaged. Furthermore, workability is improved because a sufficient space is obtained.

  Further, according to the invention of claim 2, since it has a simple configuration, it can be easily attached to an existing insulator series yoke, and is divided into left and right as a construction yoke, so that one construction The weight of the yoke can be reduced, and it is convenient to carry, especially when it is lifted to a high place.

  In the re-construction method using a large number of suspension wheels, which is performed when re-installing the wires stretched between steel towers, two strips are attached to the rear edge and two existing wires are attached to the front edge. A construction yoke is mounted on the square insulator yoke with a part projecting from both sides of the insulator yoke and the central part of the front end edge, and a suspension wheel is attached to the two existing wires. Attach each with a large number of intervals, attach semi-metal wheels to the protruding parts on both sides of each construction yoke, and temporarily pull the above two wires at one end of the wire wound around each semi-metal wheel. The two wires that are temporarily supported are separated from the insulator continuous yoke, and the front end of one of the separated wires is attached to and supported by the protruding portion of the front end edge of the construction yoke.

  One of the temporary support by the respective linear bodies of the two wires is released, and the other separated electric wire is suspended along the lower side of the one electric wire, and is supported by the protruding portion of the front end edge of the construction yoke. The other wire is pulled through the multiple suspension wheels as the parent wire of the above suspension wire method, the other wire is removed and the new wire connected to the rear end of the other wire is extended, and then the above The new wire and the one electric wire are temporarily supported by the respective linear bodies wound around each semi-metal wheel, and the front end of the one electric wire is removed from the protruding portion of the front end edge of each construction yoke. Is attached to and supported by the protrusion of the front edge of the construction yoke.

  Thereafter, the temporary support of the one electric wire and the new line by the respective linear bodies is released, respectively, the one electric wire is suspended along the lower side of the new line, and the one new wire is used as the new parent line. The electric wire is pulled through the plurality of suspension wheels to remove the electric wire and the new wire connected to the rear end of the electric wire is extended, and then the parent wire and Temporarily support each of the new lines, peel off and attach the front end of the new line to the continuous yoke, remove the front end of the new line as the parent line from the protrusion of the front end edge of the construction yoke, and The front end of the new line is attached to and supported by the continuous yoke, and the temporary support of each new line by each linear body wound around each semi-metal wheel is released.

  As a result, the construction yoke is attached to the existing insulator continuous yoke, and the main wire in the suspension method is supported and supported at the center of the interconnect yoke. Can be done easily and in a short time.

Embodiments of the present invention will be described below with reference to the drawings.
Here, FIG. 1 is a perspective view of a right construction yoke according to an embodiment of the present invention, FIG. 2 is a plan view of an upper plate of the right construction yoke, and FIG. 3 is a right construction yoke. FIG. 4 is a plan view of a retaining metal fitting of the construction yoke.

  As shown in FIG. 1, the construction yoke A is provided with two substantially L-shaped plate members facing each other, and a horizontally-long retaining metal fitting 3 between the front end edges of the two plate members. Are attached to connect the leading edges of the substantially L-shaped opposing ends, and the opposed protruding protrusions 1c on the right side of the substantially L-shaped are opened.

  These two plates are an upper plate 1 and a lower plate 2 and have almost the same configuration, but a part of the configuration is different. As shown in FIG. 2, the upper plate 1 has two through holes 1a arranged in parallel at the front end edge of the substantially L-shaped upper portion, and the bent portion of the upper plate 1 is provided in a substantially rectangular shape. The part is provided with four through holes 1b in the same arrangement as the positions of four existing through holes of the insulator yoke, which will be described later, and one through hole 1d is provided in the tip projecting part 1c. As shown in FIG. 3, the lower plate 2 has a configuration in which the tip protruding portion 1 c is not provided.

  As shown in FIG. 4, the retaining metal fitting 3 has a substantially horizontally long trapezoidal shape, and is provided with through holes 3a on the left and right side portions, and two through holes 3b are also provided between these through holes 3a. Are installed side by side. As shown in FIG. 1, such a clamp 3 is provided between the leading edges of the upper plate 1 and the lower plate 2 provided to face each other along the leading edge. The through holes 3a on the left and right side portions are protruded from both sides of the opposite end edges provided opposite to each other, and the two through holes 3b of the retaining metal fitting 3 and the respective end edges are provided. The positions of the two through holes 1a and 2a are matched, and bolts are fitted into these, respectively, and the nut is loosely tightened from the lower plate 2 side and temporarily fixed (not shown). FIG. 1 shows the right construction yoke a, and the right construction yoke a and the target construction are formed and prepared as the left construction yoke b (see FIG. 6).

Next, in the suspension method using a large number of suspension wheels, the existing wire C stretched between the two steel towers E is replaced with a new construction line , using these construction yokes A, Replace the two wires (existing wire C) .

Here, FIG. 5 is a rectangular insulator series yoke 4 for mounting the construction yoke A according to the embodiment of the present invention, and two existing wires C are attached to the front end edges thereof via the tension clamps 5 respectively. FIG. 6 is a plan view showing a state in which the left and right construction yokes a and b are attached to the insulator series yoke 4. FIG. 7 is a partial plan view of a state in which semi-metal wheels 7 are respectively attached to the left and right retaining brackets 3 of the left and right construction yokes a and b and the two existing wires C are temporarily supported.

FIG. 8 is a conceptual diagram showing a state in which two semi-metal wheels 7 are respectively attached to the left and right retaining brackets 3 of the left and right construction yokes a and b and the two existing wires C are temporarily supported. FIG. 9 shows a state in which one of the existing wires C1 is supported from the state of FIG. 7 on the tip protruding portions 1c of the construction yokes a and b via the two wires 8 with a base. FIG. 10 is a partial plan view, and FIG. 10 shows a state in which one existing line C1 is used as a parent line and the other existing line C2 is suspended by a suspension method using the construction yoke according to the embodiment of the present invention. FIG. FIG. 11 shows the construction of the embodiment of the present invention, in which the new line D1 is connected to the rear end of the other existing line C2 by hanging one of the existing lines C1 as a parent line by the suspension method. It is a front view of the state currently extended. FIG. 12 is a front view of a state in which one existing line C1 is suspended by using a construction yoke according to an embodiment of the present invention, with a temporary support new line D1 as a parent line, by a suspension method. . FIG. 13 shows the construction of the embodiment of the present invention by using the construction yoke and a new wire D2 at the rear end of one existing wire C1 suspended from the temporary support new wire D1 as a parent line by the suspension method. It is a front view of the state connected and extended.

In this case, as shown in FIG. 5, the operator D rides on the tension clamps 5 of the two existing wires C connected to the insulator continuous yoke 4 and faces the insulator continuous yoke 4. The work is performed in a state (indicated by an arrow in FIG. 5).

  The right side of the existing insulator yoke 4 to which the two insulators 6 are connected is sandwiched between the open end projections 1c of the right construction yoke a, and as shown in FIG. Each tip edge to which the arm is attached is projected from the right side of the insulator linkage yoke 4, and the tip projection 1c of the upper plate 1 of the right construction yoke a is raised from the front edge of the insulator yoke 4 so as to protrude. The right side construction yoke a is put on the insulator continuous yoke 4.

Thereafter, the positions of the two existing construction holes 4a and the two horn mounting holes 4a on the right side of the insulator series yoke 4 (see FIG. 5), and the upper plate 1 and the lower plate 2 forming the right construction yoke a Align the positions of the through holes 1b and 2b provided in the base plate, insert bolts into these holes, screw the nuts on the back surface of the lower plate 2, and fix the right construction yoke a to the insulator series yoke 4. . Mounting the yoke b for the left work by the are similarly on the left side of the stone communicating yoke 4, advance further, the Tsukin vehicles existing line C of 2 Article number, mounted respectively at intervals of Harikaeru (not shown).

As shown in FIG. 7, a semi-metal wheel 7 is attached to each through hole 3a on the existing line C side of each retaining metal fitting 3 attached to the right construction yoke a and the left yoke b.

Further, as shown in FIG. 8, a Kamuarongu 10 respectively provided to one end of each wire 9 wound on the respective semi-metal wheel 7 attached to each existing line C, each wire of each existing line C of the Article 2 Each of the existing wires C is temporarily supported by being pulled by the wire tensioner 11 provided in 9. Further, the tension clamps 5 of the two existing wires C temporarily supported are removed from the insulator continuous yoke 4, and the two existing wires C are separated from the insulator continuous yoke 4. After that, as shown in FIG. 9, there are two front end protrusions 1c of the right construction yoke a and the left construction yoke b which are the central portion of the front end edge of the insulator continuous yoke 4 and protrude from the front end edge. Two wires with stand 8 are attached to the through holes 1d, respectively, and one end of the separated existing line C1 is connected and supported by these two wires 8 with stand. At this time, one existing line C1 is supported at the position of the central portion of the edge of the insulator continuous yoke 4 on the existing line C side. Thereafter, the temporary support of each of the existing lines C is released.

As a result, as shown in FIG. 10, the above-described one existing line C1 is used as a parent line for the hanging method, and the other existing line C2 is suspended downward by a plurality of hanging wheels 12 along the existing line C1. . Then, the other existing line C2 is removed by pulling the other existing line C2 through the multiple suspension wheels 12 , and, as shown in FIG. 11, a new line D1 connected in advance to the rear end of the other existing line C2. To wire. Thereafter, a new line D1 extended from one existing line C1 which is the parent line by a temporary support wire 9 wound around a semi-metal wheel 7 supported on both sides of the left and right construction yokes a and b. Are temporarily supported, and one end of the one existing line C1 is removed from the two wire 8 with the base extending from the tip protruding portions 1c of the right construction yoke a and the left construction yoke b, and the new construction line D1 is removed. Are connected to and supported by these two wires 8 with a base. At this time, the new line D1 is supported at the center position of the edge on the existing line C side of the insulator continuous yoke 4. Thereafter, the temporary support of the one existing line C1 and the new line D1 by the temporary support wires 9 wound around the semi-metal wheel 7 is released.

Then, this new line D1 is used as a new temporary support new line, and as shown in FIG. 12 , along the new temporary support line D1 , the one existing line C1 is changed to a large number. It is hung downward by the hanging wheel 12. Therefore, the one existing line C1 is pulled through the plurality of suspension wheels 12 to remove the existing line C1, and , as shown in FIG. 13, a new line D2 connected to the rear end of the existing line C1 is extended. To do. Further, the respective wires 9 in the temporary supporting wound on the semi-metal wheel 7, a new line D2 that newly Nobesen a new line D1 of the temporary support for and each temporary support, resistance to one end of said new line D2 A tension clamp 5 is provided, and this is attached to and supported by a through-hole of the continuous yoke 4 as a new line to be officially supported, and is attached to each of the protruding ends 1c of the right construction yoke a and the left construction yoke b. One end of the temporary support line D1 connected to the two support wires 8 is removed, and this is attached to the through hole of the continuous yoke 4 as a new line to be officially supported .

Thereafter, the temporary support of the new lines D1 and D2 which are the respective formal supports by the wires 9 of the semi-metal wheels 7 attached to the clasps 3 is released. Finally, the right-hand construction yoke a and the left-hand construction yoke b attached to the insulator continuous yoke 4 are removed to complete the work.

  Further, when the construction yoke A is attached to the existing insulator yoke 4, the right construction yoke a and the left construction yoke b are inserted into the through holes having the same arrangement as the existing through holes 4a of the insulator yoke 4. Since the holes 1b and 2b are provided and the construction yoke A is attached to the insulator continuous yoke 4 by using these through holes 4a, 1b and 2b, they can be easily attached and have high versatility.

  In the above embodiment, the construction yoke A is provided with the right construction yoke a and the left construction yoke b, respectively, but these do not necessarily have to be divided into two parts. The upper plate 1 for the right side construction yoke a and the left side construction yoke b may be prepared, and these may be used integrally. The upper plate 1 and the lower plate 2 are opposed to each other to form the left and right construction yokes a and b. However, the upper plate 1 and the lower plate 2 are not necessarily used. Alternatively, two upper plates 1 may be provided opposite to each other to form a construction yoke, or only the upper plate 1 may be used if it can withstand the load.

Further, the shape of the retaining metal fitting 3 is a substantially horizontally long trapezoidal shape, but the shape of the retaining metal fitting 3 is not limited to this, and is fitted between the opposing leading edges of the upper part of the construction yoke A, and the existing wire What is necessary is just to project the through-hole 3a on the C side. When the construction yoke A is attached to the existing insulator yoke 4, the right construction yoke a and the left construction yoke b are arranged in the same manner as the existing through holes 4a of the insulator yoke 4. Although 1b and 2b are provided and the construction yoke A is attached to the insulator continuous yoke 4 using these through holes 4a, 1b and 2b, the method of attaching to the insulator continuous yoke 4 is not limited to this.

It is a perspective view of the yoke for right side construction of the Example of this invention. It is a top view of the upper board of the yoke for right side construction of the Example of this invention. It is a top view of the lower board of the yoke for right side construction of the Example of this invention. It is a top view of the retaining metal fitting of the construction yoke of the Example of this invention. It is a top view of the insulator continuous yoke of the state which attached the two existing lines which attach the construction yoke of the Example of this invention, and two insulators. It is a top view of the state which attached the construction yoke on the right and left side to the insulator continuous yoke of the Example of this invention. It is a partial top view of the state which attached the semi-metal wheel to the left and right retaining metal fittings of the left and right construction yokes of the embodiment of the present invention, and temporarily supports two existing wires . It is a conceptual diagram in the state where two semi-gold wheels are respectively attached to the left and right retaining brackets of the left and right construction yokes of the embodiment of the present invention, and the two existing wires C are temporarily supported. It is a partial top view of the state which is supporting the one existing line via the wire with two stands at the front-end | tip protrusion part of each construction yoke of the Example of this invention. Use construction yoke embodiment of the present invention, by Tsukin method, one of the existing lines as a parent line, a front view of a state of being suspended and the other existing lines. Using the construction yoke of the embodiment of the present invention, one existing It is a front view in the state where a new line is connected and extended at the rear end of the other existing line hanging down as a parent line. Using the construction yoke according to the embodiment of the present invention, the suspension support method is used for temporary support. It is a front view of the state where one existing line was suspended with the new line as a parent line. Using the construction yoke according to the embodiment of the present invention, the suspension support method is used for temporary support. It is a front view of the state which connected and extended the new line to the rear end of one existing line hanging down with the new line as a parent line. It is a perspective view of the state where two lines of electric wires are stretched across two string insulators around the armature of a conventional steel tower.

Explanation of symbols

A Construction yoke C Existing line
C1 One existing line C2 The other existing line
D1 New construction line D2 New construction line a Right construction yoke b Left construction yoke 1 Upper plate 2 Lower plate 3 Retaining bracket 4 Insulation yoke 6 Tensile clamp 6 Insulation train 7 Semi-metal wheel 8 Wire with wire 9 Wire 10 Cam along
11 Tension wire 12 Suspension wheel

Claims (2)

In the re-construction method using a number of suspension cars that are performed when re-wiring the wires stretched between steel towers,
Two insulators connected to the steel tower are attached to the rear edge, and on the rectangular insulator yoke with two existing wires attached to the front edge, the insulator yoke is perpendicular to the existing wire . A central plate of the two side edges and the front edge, partly protruding from between the two existing lines, and attached with a substantially plate-shaped construction yoke, and hung on the two existing lines A lot of gold wheels are installed at intervals,
Semi-metal wheels are attached to the projecting portions on both sides of each construction yoke, and the two existing wires are temporarily supported by one end of the wire wound around each semi-metal wheel, and temporarily supported. Two existing wires are separated from the above-mentioned insulator continuous yoke, and one end of one of the separated existing wires is attached to and supported by the projecting portion of the front edge of the construction yoke, and each of the two existing wires is The temporary support by the state body is released, and the other separated existing wire is suspended by the multiple suspension wheels along the lower side of the existing wire , and is supported by the protruding portion of the front end edge of the construction yoke. One existing line is used as a parent line for the suspension method, and the other existing line is removed by pulling the other existing line through the plurality of suspension wheels, and a new line connected to the rear end of the other existing line is extended. And then wrap it around each semi-gold car The new line and the one of the existing lines to each temporary support by the linear body has,
Remove one end of the one existing line from the projecting part of the front end edge of each construction yoke, and attach and support one end of the new line to the projecting part of the front end edge of the construction yoke . and new lines, then the temporary support of the respective linear member by new lines of one of the existing line and the temporary supporting the respective releasing said the one of the existing line along the lower side of the new line of the temporary support for It is suspended by a number of hanging wheels,
The one of the existing lines new line of the temporary supporting a new parent lines to Nobesen a new line connected to the rear end of the existing lines with removing the existing line to pull through the many Tsukin car , then attached to the temporary support new line and the newly lines for to each temporary support, connecting yoke insulator the end of the new line as new line to be officially supported by the linear body wrapped in the respective semi-gold car One end of the temporary support new wire , which is the parent wire, is removed from the projecting portion of the front end edge of the construction yoke, and this is attached to and supported by the continuous yoke as a new support wire that is officially supported ,
Furthermore, the temporary support of the new line used as the formal support of the said 2 article | item by each linear body wound around each said semi-metal wheel is cancelled | released, respectively, The replacement method of an electric wire characterized by the above-mentioned. In the above-described wire replacement method according to claim 1,
Two substantially L-shaped plate bodies are provided opposite to each other, and a horizontally-long holding metal fitting is attached between each of the two L-shaped upper end edges of the two plate bodies to connect the opposite end edges. Fixing and providing a work yoke having a tip protrusion further protruding on one side of the substantially L-shaped bent protrusion edge of one of the two plates;
In the above-mentioned wire replacement method, the two rectangular plates of the above-mentioned construction yoke are arranged on one side of the existing square-shaped insulator series yoke, to which two strips are attached, perpendicular to the two existing lines . The retaining bracket is protruded from the one side edge of the insulator continuous yoke, and the tip protruding portion of the construction yoke is protruded from the front end edge of the insulator continuous yoke to the insulator continuous yoke. Attach the other yoke, and install another similar construction yoke on the other side of the insulator series yoke.
Each semi-metal wheel is attached to the retaining part on the side where the existing electric wire is located of each retaining metal fitting attached to each construction yoke, and one existing line serving as the parent line or a new line for temporary support The one end of the insulator is attached to and supported by the front end protruding portion of each construction yoke protruding from the front end edge at the center portion of the front end edge of the insulator continuous yoke. A construction yoke used in the wire replacement method.