JP5328840B2 - Wire drawing method - Google Patents

Wire drawing method Download PDF

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JP5328840B2
JP5328840B2 JP2011119504A JP2011119504A JP5328840B2 JP 5328840 B2 JP5328840 B2 JP 5328840B2 JP 2011119504 A JP2011119504 A JP 2011119504A JP 2011119504 A JP2011119504 A JP 2011119504A JP 5328840 B2 JP5328840 B2 JP 5328840B2
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electric wire
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wire
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roller
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JP2012249437A (en
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勇 松重
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Chugoku Electric Power Co Inc
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Chugoku Electric Power Co Inc
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<P>PROBLEM TO BE SOLVED: To provide a power line extending method capable of bringing a new power line into a state that it can be wired in a tension state between steel towers without heavily burdening a worker, even when the new power line is supported by a structure constructed in the vicinity of an object required to be spaced in order to secure a separation between the new power line and the object. <P>SOLUTION: In a power line extending method, a new power line delivered from a steel tower side erected at one position of two positions defining a section for extending a power line is pulled to a steel tower side erected at the other position of the two positions, and the new power line is stretched between the steel towers at the two positions in an overhead position spaced apart a required separation from an object required to be spaced located between the steel towers. The new power line present between the steel towers is supported by a roller mounted to a position with an upper side in an opened state in a structure arranged in the vicinity of the object required to be spaced, at an overhead position separating from the object by more than the required separation. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

本発明は、送電線や配電線等の電線を架設するための電線延線工法に関する。   The present invention relates to a wire drawing method for constructing electric wires such as power transmission lines and distribution lines.

複数の鉄塔に対して送電線や配電線等の電線を架け渡すための電線延線工法として、引抜工法が公知である。かかる引抜工法は、新規な電線(以下、新電線という)を架設する区間(以下、この区間を架設区間という)を画する二つの地点のうちの一方の地点に立設された鉄塔(以下、第一鉄塔という)側から送り出した新電線を前記二つの地点のうちの他方の地点に立設された鉄塔(以下、第二鉄塔という)側に引っ張ることで新電線を第一鉄塔と第二鉄塔とに架け渡すようにした工法である。すなわち、引抜工法は、第一鉄塔の近傍に設置した電線送出装置から新電線を送り出しつつ、第二鉄塔の近傍に設置した巻取装置で新電線の先端に接続したロープや電線等を巻き取ることで、電線送出装置から送り出された新電線を第一鉄塔と第二鉄塔とに架け渡すようにした工法である。   A drawing method is known as a wire drawing method for bridging wires such as transmission lines and distribution lines to a plurality of steel towers. Such a drawing method is a steel tower (hereinafter referred to as a steel tower) erected at one of two points that define a section (hereinafter referred to as a construction section) where a new wire (hereinafter referred to as a new wire) is constructed. By pulling the new electric wire sent out from the side of the first steel tower) to the side of the tower (hereinafter referred to as the second steel tower) standing at the other of the two points, It is a construction method that spans the steel tower. That is, in the drawing method, a new electric wire is sent out from an electric wire sending device installed in the vicinity of the first steel tower, and a rope or an electric wire connected to the tip of the new electric wire is wound up by a winding device installed in the vicinity of the second steel tower. This is a construction method in which the new electric wire sent out from the electric wire sending device is bridged between the first steel tower and the second steel tower.

より具体的に説明すると、引抜工法を用いて新設の鉄塔間に新電線を架設する場合(新規な送電系を構築する場合)、ヘリコプターを利用して架設区間内にある第一鉄塔及び第二鉄塔を含む複数の鉄塔に架け渡したロープの一端側又は電線送出装置から送り出された新電線の先端側を第一鉄塔のアームに取り付けた金車に支持させた上で前記ロープの一端と前記新電線の先端とを接続するとともに、前記ロープの他端側を第二鉄塔のアームに取り付けた金車に支持させた上で巻取装置に導入した後、電線送出装置から新電線を送り出しつつ巻取装置でロープを巻き取ることで、新電線を引っ張って第一鉄塔(金車)と第二鉄塔(金車)とに架け渡すようにしている(例えば、特許文献1参照)。   More specifically, when a new electric cable is installed between new towers using the drawing method (when a new power transmission system is constructed), the first tower and second tower in the installation section using a helicopter One end of the rope and the one end of the rope supported by a gold wheel attached to the arm of the first steel tower on one end side of the rope spanned over a plurality of steel towers including the steel tower or the tip of the new electric wire sent out from the wire sending device While connecting the tip of the new wire and supporting the other end of the rope to the gold wheel attached to the arm of the second steel tower and introducing it to the winding device, the new wire is being sent out from the wire sending device. By winding the rope with a winding device, the new electric wire is pulled and bridged between the first steel tower (gold wheel) and the second steel tower (gold wheel) (for example, see Patent Document 1).

そして、引抜工法で電線の張り替えを行う場合(電線を交換する場合)、架設区間内にある交換の対象となる電線(以下、旧電線という)を第一鉄塔及び第二鉄塔の近傍の二箇所で切断し、旧電線の一端側又は電線送出装置から送り出された新電線の先端側を第一鉄塔のアームに取り付けた金車に支持させた上で前記旧電線の一端と前記新電線の先端とを接続するとともに、該旧電線の他端側又は巻取装置に導入されたロープの後端側を第二鉄塔のアームに取り付けた金車に支持させた上で該旧電線の他端とロープの後端とを接続した後、電線送出装置から新電線を送り出しつつ巻取装置でロープ及び旧電線を巻き取ることで、新電線を引っ張って第一鉄塔(金車)と第二鉄塔(金車)とに架け渡すようにしている。   Then, when redrawing the wires by the drawing method (when replacing the wires), the wires to be exchanged in the erection section (hereinafter referred to as the old wires) are located in two locations near the first and second towers. The end of the old electric wire and the tip of the new electric wire are supported by a gold wheel attached to the arm of the first steel tower. And the other end side of the old electric wire or the rear end side of the rope introduced into the winding device is supported by a gold wheel attached to the arm of the second steel tower, and the other end of the old electric wire After connecting the rear end of the rope, pulling the new wire from the wire feeder while winding the rope and the old wire with the winding device, pulling the new wire, the first steel tower (gold wheel) and the second steel tower ( It is designed to be bridged with a gold wheel.

ところで、移送時の新電線や鉄塔に架け渡された新電線には、巻取装置の巻き取りによる引っ張り力が作用するが、該引っ張り力は、鉄塔間に正規に架設された電線に作用する張力よりも小さいのが現状である。そのため、移送時の新電線や鉄塔に架け渡された新電線は、鉄塔間に正規に架設されたときのような緊張状態にならず、鉄塔間で下方に向けて大きく撓んでしまう(下方側に凸をなすように湾曲する)。   By the way, the pulling force due to the winding of the winding device acts on the new electric wire or the new electric wire that has been transferred over the steel tower, but the pulling force acts on the electric wire that is normally installed between the steel towers. The current situation is smaller than the tension. Therefore, the new electric wire at the time of transfer and the new electric wire laid over the steel tower do not become a tension state when it is normally installed between the steel towers, and greatly bends downward between the steel towers (lower side Curved so that it is convex).

その結果、新電線の架設される位置の下方に、道路や、鉄道線路、別の系統の電線等(以下、これらを要離隔対象物という)が存在した場合、鉄塔間で撓んだ新電線が要離隔対象物に接近することになり、新電線と要離隔対象物との離隔距離を十分に確保することができない場合がある。   As a result, if there are roads, railroad tracks, wires of other systems (hereinafter referred to as objects requiring separation) below the position where the new wires are installed, the new wires bent between the towers May approach the object requiring separation, and the separation distance between the new electric wire and the object requiring separation may not be sufficiently secured.

そこで、架設区間内にある第一鉄塔及び第二鉄塔を含む複数の鉄塔に新電線を架け渡すときに、新電線と要離隔対象物との離隔距離を十分に確保できない虞がある場合には、要離隔対象物の近傍に一時的な鉄塔(以下、仮設鉄塔という)を建設し、該仮設鉄塔の上部に設けられた横方向に延びるアームに吊り下げた吊金車で鉄塔間にある新電線を支持(中継)し、鉄塔間にある新電線と地上にある要離隔対象物との離隔距離を確保するようにしている。   Therefore, when a new electric wire is transferred to a plurality of steel towers including the first steel tower and the second steel tower in the construction section, there is a possibility that the separation distance between the new electric wire and the object to be separated cannot be sufficiently secured. A temporary steel tower (hereinafter referred to as a temporary steel tower) is constructed in the vicinity of the object to be separated, and a new suspension between the steel towers is suspended by a laterally extending arm provided at the top of the temporary steel tower. The electric wires are supported (relayed), and the separation distance between the new electric wires between the steel towers and the objects requiring separation on the ground is ensured.

そして、架設区間内にある第一鉄塔及び第二鉄塔を含む複数の鉄塔に新電線が架け渡されると、鉄塔の金車や仮設鉄塔の吊金車から新電線を取り外した上で、該新電線に対して鉄塔間に架け渡すときの引っ張り力(巻取装置による引っ張り力)よりも大きな張力を作用させつつ該新電線を各鉄塔(鉄塔のアームに取り付けられた碍子)に連結する。これにより、鉄塔間の新電線は、鉄塔間での撓み(垂れ下がり)が矯正されて地上にある要離隔対象物に対する離隔距離が確保された状態で架設されることになる。   Then, when a new electric wire is laid over a plurality of steel towers including the first and second towers in the construction section, the new electric wires are removed from the steel wheel of the steel tower or the suspension wheel of the temporary steel tower, and then the new wire is removed. The new electric wire is connected to each steel tower (the insulator attached to the arm of the steel tower) while applying a tension larger than the pulling force (the pulling force by the winding device) when the wire is bridged between the steel towers. Thereby, the new electric wire between steel towers is constructed in the state where the distance (separation) between steel towers was corrected and the separation distance with respect to the separation target object on the ground was ensured.

特開2006−67769号公報JP 2006-67769 A

しかしながら、上述の如く、複数の鉄塔に新電線を架け渡すときに、仮設鉄塔のアームに吊り下げた吊金車に新電線を支持させると、該新電線を緊張状態にして鉄塔(碍子)に連結するまでの作業が非常に煩雑で作業者に大きな負担を負わせるといった問題がある。   However, as described above, when a new electric wire is bridged over a plurality of steel towers, if the new electric wire is supported by a suspension wheel suspended from the arm of the temporary steel tower, the new electric wire is put in tension and the steel tower (insulator) is placed in tension. There is a problem that the work until the connection is very complicated and places a heavy burden on the operator.

具体的に説明すると、前記吊金車は、仮設鉄塔のアームに吊り下げられるため、該吊金車に支持された新電線の上方に仮設鉄塔のアームが存在することになり、仮設鉄塔の吊金車に支持させていた新電線をそのまま鉄塔に連結する(新電線に大きな張力を作用させる)と、撓んでいた新電線(弛んでいた新電線)が緊張状態になって上方に浮き上がり、仮設鉄塔のアームと干渉することになる。   Specifically, since the suspension wheel is suspended from the arm of the temporary tower, the arm of the temporary tower exists above the new electric wire supported by the suspension wheel. If the new electric wire supported by the gold wheel is connected to the tower as it is (a large tension is applied to the new electric wire), the bent new electric wire (the loose new electric wire) will be in tension and will be lifted upward. It will interfere with the tower arm.

そのため、通常、吊金車から取り外した新電線を鉄塔(碍子)に連結する前に、地上に居る作業者が新電線に繋いだロープを引っ張ることで、アームを躱しつつ該新電線をアームの上方に移動させる作業を行うが、鉄塔間の新電線は、撓み(弛み)が進行することのないように略一定の張力が作用した状態になっており、地上からロープを引っ張って鉄塔間の新電線を操作することは非常に煩雑である上に作業者にとって大きな負担になる。   Therefore, before connecting the new electric wire removed from the suspension wheel to the steel tower (lion), the operator on the ground pulls the rope connected to the new electric wire so that the new electric wire is However, the new electric wire between the towers is in a state where a substantially constant tension is applied so that the bending (slack) does not progress, and the rope is pulled from the ground between the towers. It is very cumbersome to operate the new electric wire and is a heavy burden on the operator.

そこで、本発明は、斯かる実情に鑑み、新電線と要離隔対象物との離隔距離を確保すべく要離隔対象物近傍に配置された構造物に新電線を支持させても、作業者に大きな負担を負わせることなく鉄塔間に新電線を緊張状態で架設可能な状態にすることのできる電線延線工法を提供することを課題とする。   Therefore, in view of such a situation, the present invention allows an operator to support a new electric wire on a structure arranged in the vicinity of the separation target object so as to secure a separation distance between the new electric wire and the separation target object. It is an object of the present invention to provide a wire drawing method that allows a new electric wire to be installed in a tensioned state between steel towers without imposing a heavy burden.

本発明の電線延線工法は、電線を架け渡す区間を画する二つの地点のうちの一方の地点に立設された鉄塔側から送り出した新電線を前記二つの地点のうちの他方の地点に立設された鉄塔側に引っ張り、鉄塔間にある要離隔対象物から必要な離隔距離をあけた上方位置で前記新電線を前記二つの地点にある鉄塔に架け渡すための電線延線工法であって、前記要離隔対象物の近傍に配置された構造物における上方側が開放状態になった位置に取り付けたローラに、鉄塔間にある新電線を要離隔対象物の最上部から必要な離隔距離以上離れた高位置で支持させることを特徴とする。   In the wire drawing method of the present invention, the new electric wire sent from the tower side standing at one of the two points defining the section where the electric wire is bridged is used as the other of the two points. This is an electric wire drawing method for pulling to the erected tower side and passing the new electric wire to the pylon at the two points at an upper position with a necessary separation distance from the required separation object between the pylons. In addition, a new electric wire between the steel towers is more than the necessary separation distance from the uppermost part of the separation target object to a roller attached at a position where the upper side in the structure arranged in the vicinity of the separation target object is open. It is supported at a distant high position.

本発明の電線延線工法は、前記要離隔対象物の近傍に配置された構造物における上方側が開放状態になった位置に取り付けたローラに、鉄塔間にある新電線を要離隔対象物の最上部から必要な離隔距離以上離れた高位置で支持させるようにしているため、要離隔対象物の上方にある新電線は、移送中や鉄塔に架け渡された状態で要離隔対象物から必要な離隔距離以上離れた場所に位置することになる。   In the wire drawing method of the present invention, a new electric wire between steel towers is attached to a roller attached to a position where the upper side of the structure arranged in the vicinity of the object to be separated is opened. Since it is supported at a high position that is more than the required separation distance from the upper part, the new electric wire above the separation target object is necessary from the separation target object during the transfer or over the steel tower. It will be located in a place more than the separation distance.

そして、該電線延線工法は、構造物における上方側が開放状態になった位置に取り付けたローラに新電線を支持させるため、ローラに支持された新電線の上方側(開放空間)への移動が許容された状態になる。これにより、該電線延線工法は、新電線が鉄塔に架け渡された後に該新電線に対して大きな張力を作用させたときに、新電線の撓みが吸収されて新電線が上方に向けて移動してもその移動が阻害されることがない。従って、従来のように作業者に大きな負担を負わせることなく、鉄塔に架け渡した新電線を適正な架設位置(送電するときに適正とされる位置)にまで移動させることができる。   And in this wire drawing method, since the new electric wire is supported by the roller attached to the position where the upper side in the structure is in the open state, the movement of the new electric wire supported by the roller to the upper side (open space) It becomes an allowed state. As a result, when the wire extension method is applied to a large tension on the new wire after the new wire is bridged over the steel tower, the deflection of the new wire is absorbed and the new wire is directed upward. Even if it moves, the movement is not hindered. Therefore, the new electric wire laid over the steel tower can be moved to an appropriate installation position (position appropriate for power transmission) without placing a heavy burden on the operator as in the past.

本発明の一態様として、要離隔対象物を介在させるように前記構造物を鉄塔の並ぶ方向に間隔をあけて二つ配置し、各構造物に取り付けられた前記ローラに前記新電線を支持させるようにしてもよい。このようにすれば、新電線が長手方向に移送されるときに、構造物(ローラ)の配置に対応する二カ所で支持されることになる。従って、要離隔対象物と該要離隔対象物の上方を通過する新電線との間隔を必要な離隔距離に確実に保つことができる。   As one aspect of the present invention, two structures are arranged at intervals in the direction in which the steel towers are arranged so as to interpose an object to be separated, and the new electric wires are supported by the rollers attached to the structures. You may do it. If it does in this way, when a new electric wire is transferred to a longitudinal direction, it will be supported by two places corresponding to arrangement of a structure (roller). Therefore, it is possible to reliably keep the distance between the required separation object and the new electric wire passing above the separation object at a necessary separation distance.

この場合、要離隔対象物の最上部から上方側に必要な離隔距離以上離れて新電線よりも下側になる位置で二つの構造物間に跨るように防護ネットを張設した状態で前記ローラに新電線を支持させることが好ましい。このようにすれば、何らかの要因で構造物間の新電線が垂れ下がったとしても、防護ネットの存在で新電線を要離隔対象物に対して必要な隔離距離を保った状態にすることができる。   In this case, the roller in a state where a protective net is stretched so as to straddle between two structures at a position which is more than the necessary separation distance from the uppermost part of the object to be separated to the upper side and below the new electric wire. It is preferable to support the new electric wire. In this way, even if the new electric wire between the structures hangs down due to some factor, the new electric wire can be kept in a state of having a necessary separation distance from the object to be separated due to the presence of the protective net.

本発明の他態様として、前記ローラが軸心方向の中央から両端に向けて拡径していることが好ましい。このようにすれば、移送中の新電線がローラの軸心方向の何れか一端側に位置変更しようとしてもローラの軸心方向の中央部に導くことができ、新電線をローラで確実に支持することができる。   As another aspect of the present invention, it is preferable that the diameter of the roller increases from the center in the axial direction toward both ends. In this way, the new electric wire being transferred can be guided to the center in the axial direction of the roller even if the position of the new electric wire is to be changed to one end in the axial direction of the roller, and the new electric wire is securely supported by the roller. can do.

本発明の別の態様として、前記ローラが鉄塔の並ぶ方向に間隔をあけて前記構造物に複数取り付けられ、該複数のローラに新電線を支持させることが好ましい。このようにすれば、新電線が複数箇所で支持されることになり、新電線が構造物上で局所的に屈曲するような態様になることを防止できる。これにより、新電線の移送を円滑に行うことができる。   As another aspect of the present invention, it is preferable that a plurality of the rollers are attached to the structure at intervals in the direction in which the steel towers are arranged, and the plurality of rollers support the new electric wires. If it does in this way, a new electric wire will be supported by multiple places, and it can prevent that it becomes the aspect which a new electric wire bends locally on a structure. Thereby, transfer of a new electric wire can be performed smoothly.

本発明のさらに別の態様として、前記ローラの上方側に位置するように構造物に取り付けられた規制ローラで前記ローラに支持された新電線の上方側への移動を規制しつつ該新電線を移送し、該新電線が鉄塔間に架け渡された後に規制ローラを前記ローラの前記上方側の位置から排してローラ上の新電線の上方側への移動を許容するようにしてもよい。このようにすれば、移送中に新電線がローラ上で跳ね上がろうとしても、新電線の上下方向の移動を規制してローラ上で新電線が跳ね上がることを防止することができる。従って、新電線を移送する際に該新電線をローラに確実に支持させることができる。   As still another aspect of the present invention, the new electric wire is controlled while restricting the upward movement of the new electric wire supported by the roller by a restriction roller attached to the structure so as to be positioned above the roller. After the new electric wire is bridged between the steel towers, the restriction roller may be removed from the upper position of the roller to allow the new electric wire on the roller to move upward. If it does in this way, even if a new electric wire tries to jump up on a roller during transfer, the movement of a new electric wire can be controlled and it can prevent that a new electric wire jumps up on a roller. Therefore, when the new electric wire is transferred, the new electric wire can be reliably supported by the roller.

また、該新電線が鉄塔間に架け渡された後に規制ローラを前記ローラの前記上方側の位置から排してローラ上の新電線の上方側への移動を許容するため、新電線が鉄塔に架け渡された後に該新電線に対して大きな張力を作用させたときに、新電線の撓みが吸収されて新電線が上方に向けて移動してもその移動が阻害されることがない。従って、従来のように作業者に大きな負担を負わせることなく、新電線を適正な架設位置(送電するときに適正とされる位置)にまで移動させることができる。   In addition, after the new electric wire is bridged between the towers, the restriction roller is removed from the upper position of the roller to allow the new electric wire on the roller to move upward. When a large tension is applied to the new electric wire after it has been bridged, the movement of the new electric wire is not hindered even if the new electric wire is absorbed upward and moved upward. Therefore, the new electric wire can be moved to an appropriate erection position (position appropriate for power transmission) without imposing a heavy burden on the operator as in the past.

また、本発明のさらに別の態様として、前記ローラの軸線方向に間隔をあけた状態でそれぞれが起立するように構造物に取り付けられた二本のガイドローラ間に新電線を介装した状態で該新電線を前記ローラに支持させるようにしてもよい。このようにすれば、移送中の新電線がローラの軸心方向の何れか一端側に位置変更したときに、何れか一方のガイドローラが新電線のさらなる移動を規制することになる。従って、新電線がローラから脱落することを阻止し、新電線をローラ上に維持させることがでる。   Further, as another aspect of the present invention, a new electric wire is interposed between two guide rollers attached to the structure so that each of the rollers stands up in a state spaced apart in the axial direction of the roller. The new electric wire may be supported by the roller. If it does in this way, when the position of the new electric wire under transfer will change in any one end side of the axial center direction of a roller, any one guide roller will control the further movement of a new electric wire. Therefore, it is possible to prevent the new electric wire from dropping from the roller and to maintain the new electric wire on the roller.

以上のように、本発明の電線延線工法によれば、新電線と要離隔対象物との離隔距離を確保すべく要離隔対象物近傍に配置された構造物に新電線を支持させても、作業者に大きな負担を負わせることなく鉄塔間に新電線を緊張状態で架設可能な状態にすることができるという優れた効果を奏し得る。   As described above, according to the wire drawing method of the present invention, even if a new wire is supported on a structure arranged in the vicinity of the object requiring separation in order to ensure a separation distance between the new wire and the object requiring separation. Thus, it is possible to achieve an excellent effect that a new electric wire can be installed in a tensioned state between steel towers without placing a heavy burden on the operator.

本発明の一実施形態に係る電線延線工法で新電線が架設される新規な送電系の鉄塔及び要離隔対象物の配置の一例を示した概略図を示す。BRIEF DESCRIPTION OF THE DRAWINGS The schematic which showed an example of arrangement | positioning of the new steel tower of a power transmission system by which a new electric wire is constructed by the wire drawing method which concerns on one Embodiment of this invention, and a separation required object is shown. 同実施形態に係る電線延線方法に採用される構造物(仮設鉄塔)の上部部分正面図を示す。The upper part front view of the structure (temporary steel tower) employ | adopted for the wire extension method which concerns on the embodiment is shown. 同実施形態に係る電線延線工法に採用される構造物(仮設鉄塔)の上部側面図を示す。The upper part side view of the structure (temporary steel tower) employ | adopted for the wire extension method concerning the embodiment is shown. 同実施形態に係る電線延線工法で新規の送電系の電線を架設する際の工程図であって、(a)は、各鉄塔に金車を取り付けるとともに、要離隔対象物の近傍に構造物(仮設鉄塔)を建設して構造物間に防護ネットを張設した状態を示し、(b)は、鉄塔にロープを架け渡し、該ロープを巻取装置に導入するとともに前記ロープを電線送出装置から送り出した新電線と接続した状態を示す。It is a process figure at the time of constructing the electric wire of a new power transmission system by the wire extension method concerning the embodiment, and (a) attaches a gold wheel to each steel tower, and is a structure in the vicinity of a separation target object (Temporary steel tower) is constructed and a protective net is stretched between the structures. (B) shows a state in which a rope is bridged over the steel tower, the rope is introduced into a winding device, and the rope is connected to an electric wire sending device. The state connected with the new electric wire sent out from is shown. 同実施形態に係る電線延線工法で新規の送電系の電線を仮設する際の工程図であって、(a)は、ロープを巻取装置で巻き取って新電線を鉄塔間で移送し、該新電線を鉄塔に架け渡した状態を示し、(b)は、鉄塔に架け渡した新電線に張力を作用させて鉄塔のアームに取り付けた碍子連に連結した状態を示す。It is a process diagram at the time of temporarily constructing a new power transmission system electric wire by the wire drawing method according to the embodiment, wherein (a) winds the rope with a winding device and transfers the new electric wire between steel towers, The state in which the new electric wire is bridged over the steel tower is shown, and (b) shows the state in which the new electric wire bridged over the steel tower is connected to an insulator chain attached to the arm of the steel tower by applying tension. 同実施形態に係る電線延線工法で新電線に交換される旧電線が架設された既設の送電系の鉄塔及び要離隔対象物の配置の一例を示した概略図を示す。The schematic which showed an example of arrangement | positioning of the existing power transmission system tower and the separation required object in which the old electric wire exchanged for a new electric wire by the wire extension method concerning the embodiment was constructed is shown. 同実施形態に係る電線延線工法で旧電線を新電線に交換する際の工程図であって、(a)は、各鉄塔に金車を取り付けるとともに、要離隔対象物の近傍に構造物(仮設鉄塔)を建設して構造物間に防護ネットを張設した状態を示し、(b)は、架設区間の旧電線を切断し、巻取装置に導入したロープ及び電線送出装置から送り出した新電線に切断した旧電線を接続した状態を示す。It is a process figure at the time of exchanging an old electric wire for a new electric wire with the electric wire extension method concerning the embodiment, and (a) attaches a gold wheel to each steel tower, and is near a structure ( (Temporary steel tower) is constructed and a protective net is stretched between the structures. (B) shows the new wire cut from the old wire in the installation section and sent out from the rope and wire feeder The state which connected the old electric wire cut to the electric wire is shown. 同実施形態に係る電線延線工法で旧電線を新電線に交換する際の工程図であって、(a)は、ロープ及び旧電線を巻取装置で巻き取って新電線を鉄塔間で移送し、新電線を鉄塔間に架け渡した状態を示し、(b)は、鉄塔に架け渡した新電線に張力を作用させて鉄塔のアームに取り付けた碍子連に連結した状態を示す。It is a process figure at the time of exchanging an old electric wire for a new electric wire by the wire drawing method concerning the embodiment, (a) winds up a rope and an old electric wire with a winding device, and transfers a new electric wire between steel towers Then, a state where the new electric wire is bridged between the steel towers is shown, and (b) shows a state where the new electric wire bridged over the steel tower is connected to the insulator series attached to the arm of the steel tower by applying tension. 本発明の他実施形態に係る電線延線方法に採用される構造物に取り付けられるローラユニットの概略斜視図であって、(a)は、ローラの上方位置に規制ローラを配置した状態を示し、(b)は、ローラの上方位置から規制ローラを排した状態を示す。It is a schematic perspective view of the roller unit attached to the structure adopted in the wire drawing method according to another embodiment of the present invention, (a) shows a state in which the restriction roller is arranged at the upper position of the roller, (B) shows the state which excluded the control roller from the upper position of the roller.

以下、本発明の一実施形態に係る電線延線工法について、添付図面を参照しつつ説明する。   Hereinafter, a wire drawing method according to an embodiment of the present invention will be described with reference to the accompanying drawings.

本実施形態に係る電線延線工法(以下、単に工法という)は、複数の鉄塔間に送電線や配電線等の電線を架け渡す際に適用される。より具体的には、本実施形態に係る工法は、図1に示す如く、鉄塔Ta,Tb,Tc間に新規な電線(新電線)Laを架設するに当たり、新電線Laの架設される位置の下方に、新電線Laとの離隔距離を確保する必要のある道路や、鉄道線路(特高送電線)、別の系統の電線等(要離隔対象物)Xが存在する場合に適用される。   The wire drawing method according to the present embodiment (hereinafter simply referred to as a method) is applied when an electric wire such as a power transmission line or a distribution line is bridged between a plurality of steel towers. More specifically, as shown in FIG. 1, the construction method according to the present embodiment is used to install a new electric wire (new electric wire) La between the towers Ta, Tb, and Tc. This is applied when there is a road X, a railway line (extra-high power transmission line), another system of electric wires, etc. (separate object required) X that needs to secure a separation distance from the new electric wire La below.

そして、本実施形態に係る工法は、要離隔対象物Xの上方を通過する新電線Laを鉄塔Ta,Tb,Tc間で支持するための構造物を要離隔対象物Xの近傍に配置することを前提としている。   And the construction method concerning this embodiment arranges the structure for supporting new electric wire La which passes above the required separation object X between steel towers Ta, Tb, and Tc in the vicinity of separation required object X. Is assumed.

かかる構造物は、小型の鉄塔や、鉄柱の他、新電線Laに対する離隔距離の制限のない建築物等を採用することができる。そして、前記構造物は、既設のものでもよいが、本実施形態においては、一時的に建設する仮設鉄塔を採用する。   As such a structure, a small steel tower, a steel pillar, a building with no limitation on the separation distance from the new electric wire La, and the like can be adopted. And although the said structure may be an existing thing, in this embodiment, the temporary iron tower constructed temporarily is employ | adopted.

ここで、本実施形態で採用する仮設鉄塔について説明すると、該仮設鉄塔は、図2及び図3に示す如く、地上に立設される鉄塔本体10と、鉄塔本体10の上部から横方向に延出したアーム11とを備えている。前記鉄塔本体10及びアーム11は、何れも鉄骨(型鋼)を組み合わせて構成される。   Here, the temporary steel tower employed in the present embodiment will be described. The temporary steel tower, as shown in FIGS. 2 and 3, extends in the horizontal direction from the steel tower body 10 standing on the ground and the upper part of the steel tower body 10. The arm 11 is provided. The steel tower body 10 and the arm 11 are both configured by combining steel frames (steel).

本実施形態に係る鉄塔本体10は、最上部が対象となる要離隔対象物Xの最上部から上方側に必要な離隔距離以上離れた位置になるように高さ設定されている。   The tower main body 10 according to the present embodiment is set to have a height so that the uppermost part is at a position separated from the uppermost part of the target separation target X, which is a target, by a distance greater than the necessary separation distance.

本実施形態に係る仮設鉄塔1,1は、前記アーム11が鉄塔本体10の最上部に延設される。前記仮設鉄塔1,1は、鉄塔Ta,Tb,Tcに架け渡される新電線Laの真下にアーム11が位置するように建設される。一般的に、送電線等の電線は、各鉄塔Ta,Tb,Tcの本体の両側に延設されたアーム(採番しない)のそれぞれの先端同士を結ぶように架設されるため、該鉄塔Ta,Tb,Tcの各アームに接続された電線は、隣り合う鉄塔Ta,Tb,Tcの並ぶ方向と直交方向に間隔をあけて配置された状態になる。   In the temporary towers 1 and 1 according to the present embodiment, the arm 11 is extended to the uppermost part of the tower body 10. The temporary steel towers 1 and 1 are constructed so that the arm 11 is positioned directly below the new electric wire La spanned over the steel towers Ta, Tb, and Tc. Generally, electric wires such as power transmission lines are constructed so as to connect the respective ends of arms (not numbered) extending on both sides of the main body of each tower Ta, Tb, Tc. , Tb, and Tc, the electric wires connected to the arms are arranged in a direction perpendicular to the direction in which adjacent steel towers Ta, Tb, and Tc are arranged.

これに伴い、本実施形態に係る仮設鉄塔1,1は、鉄塔本体10の両側に一対のアーム11が延設されて正面視T字状をなし、仮設した状態で一対のアーム11の上方に鉄塔Ta,Tb,Tc間に跨る新電線Laが存在するように構築される。   Accordingly, the temporary towers 1, 1 according to the present embodiment have a pair of arms 11 extending on both sides of the tower main body 10 to form a T shape in front view, and in a temporarily installed state above the pair of arms 11. It is constructed so that there is a new electric wire La straddling between the steel towers Ta, Tb, Tc.

そして、かかる仮設鉄塔1,1は、鉄塔Ta,Tb,Tcに架け渡されて隣り合う鉄塔Ta,Tb,Tc間で撓んだ新電線Laや後述するロープLc、旧電線Lbを支持するためのローラ12…が取り付けられる。該ローラ12…は、隣り合う鉄塔Ta,Tcの新電線LaやロープLcを支持する部分(後述する金車)同士を結んだ仮想直線(図示しない)よりも下方に位置するように配置される。   The temporary towers 1 and 1 support the new electric wire La, the later-described rope Lc, and the old electric wire Lb that are bridged between the steel towers Ta, Tb, and Tc and bent between the adjacent steel towers Ta, Tb, and Tc. The rollers 12 are attached. The rollers 12 are arranged so as to be positioned below a virtual straight line (not shown) that connects portions (gold wheels described later) that support the new electric wires La and the ropes Lc of the adjacent towers Ta and Tc. .

かかるローラ12…は、仮設鉄塔1,1の上方側が開放状態になった位置に取り付けられる。本実施形態に係る仮設鉄塔1,1は、アーム11が鉄塔本体10の最上部に延設されることで、アーム11の上方が開放しているため、前記ローラ12…がアーム11の上面(アーム11の上面に取り付けた後述のベース13)に取り付けられる。   The rollers 12 are attached to a position where the upper side of the temporary towers 1 and 1 is open. In the temporary towers 1 and 1 according to the present embodiment, the arm 11 is extended to the uppermost part of the tower main body 10, so that the upper side of the arm 11 is open. It is attached to a base 13) which will be described later attached to the upper surface of the arm 11.

そして、該ローラ12…は、鉄塔Ta,Tb,Tc間にある新電線La(及びロープLc)を要離隔対象物Xの最上部から必要な離隔距離以上離れた高位置で支持可能に配置される。このような条件のもと、ローラ12…の取り付け位置(本実施形態においてはアーム11の上面に取り付けたベース13)は、隣り合う鉄塔Ta,Tb,Tcの新電線LaやロープLcを支持する部分(後述する金車W)同士を結んだ前記仮想直線よりも下方であることを前提に、取り付けたローラ12…が新電線La(及びロープLc)を要離隔対象物Xの最上部から必要な離隔距離以上離れた高位置で支持可能となるように高さ設定される。   And this roller 12 ... is arrange | positioned so that the new electric wire La (and rope Lc) between steel towers Ta, Tb, and Tc can be supported in the high position away from the uppermost part of the required separation object X more than a required separation distance. The Under such conditions, the attachment position of the rollers 12 (in this embodiment, the base 13 attached to the upper surface of the arm 11) supports the new electric wires La and the ropes Lc of the adjacent towers Ta, Tb, Tc. The attached rollers 12... Need the new electric wires La (and the ropes Lc) from the uppermost part of the separation target object X on the assumption that they are below the virtual straight line connecting the parts (the gold wheels W described later). The height is set so that it can be supported at a high position that is more than a certain separation distance.

本実施形態に係る仮設鉄塔1,1は、上述の如く、アーム11が鉄骨の組み合わせで構成されることで該アーム11に空間部が形成されるため、上面にプレート状のベース13を取り付けた上で該ベース13にローラ12…が取り付けられる。本実施形態に係るベース13は、アーム11の上面を介して該アーム11の前面上部から該アーム11の背面上部にかけて設けられている。すなわち、該ベース13は、アーム11の上面上に配置されるベース本体130と、該ベース本体130の一端に連設されてアーム11の前面(アーム11の延出する方向及び上下方向の二方向と直交する方向の一方の面)の上部に重なる前片部131と、該ベース本体130の他端に連設されてアーム11の背面(アーム11の延出する方向及び上下方向の二方向と直交する方向の他方の面)の上部に重なる後片部132とで構成される(図3参照)。   As described above, the temporary steel towers 1 and 1 according to this embodiment have a plate-like base 13 attached to the upper surface because the arm 11 is formed of a combination of steel frames so that a space is formed in the arm 11. Above, the rollers 12 are attached to the base 13. The base 13 according to this embodiment is provided from the upper surface of the arm 11 to the upper surface of the back surface of the arm 11 via the upper surface of the arm 11. That is, the base 13 includes a base main body 130 disposed on the upper surface of the arm 11 and a front surface of the arm 11 connected to one end of the base main body 130 (the extending direction of the arm 11 and the two directions in the vertical direction). A front piece 131 that overlaps the upper part of one surface in a direction orthogonal to the base body 130, and a rear surface of the arm 11 that is connected to the other end of the base body 130 (an extension direction of the arm 11 and two directions in the vertical direction). And a rear piece 132 that overlaps the upper portion of the other surface in the orthogonal direction (see FIG. 3).

前記ローラ12…は、一般的な円柱状のローラを採用してもよいが、本実施形態においては、軸心方向の中央から両端に向けて拡径したものを採用している。すなわち、本実施形態において、前記ローラ12には、鼓型のローラを採用している。そして、本実施形態において、前記ローラ12…は、鉄塔Ta,Tb,Tcの並ぶ方向(新電線Laの移送方向)に間隔をあけて仮設鉄塔1,1(アーム11)に複数取り付けられる。より具体的には、前記複数のローラ12…は、アーム11の前面からアーム11の背面にかけて配置された前記ベース13上に所定の間隔をあけて配置される。本実施形態においては、アーム11の上面(ベース本体130)に該アーム11の延出する方向と直交する方向(新電線Laの移送方向)に間隔をあけて複数のローラ12…を配置するとともに、アーム11の前面(前片部131)及び背面(後片部132)のそれぞれにローラ12を一つずつ配置し、また、アーム11の上面(ベース本体130)と前面(前片部131)との境界部分及びアーム11の上面(ベース本体130)と背面(後片部132)との境界部分にも前記ローラ12…を一つずつ配置するようにしている。   Although the said roller 12 ... may employ | adopt a general cylindrical roller, in this embodiment, what expanded the diameter toward the both ends from the center of the axial center direction is employ | adopted. That is, in the present embodiment, a drum-type roller is adopted as the roller 12. In the present embodiment, a plurality of the rollers 12 are attached to the temporary steel towers 1 and 1 (arms 11) at intervals in the direction in which the steel towers Ta, Tb, and Tc are arranged (the transfer direction of the new electric wires La). More specifically, the plurality of rollers 12 are arranged at predetermined intervals on the base 13 arranged from the front surface of the arm 11 to the back surface of the arm 11. In the present embodiment, a plurality of rollers 12 are arranged on the upper surface of the arm 11 (base body 130) at intervals in a direction perpendicular to the extending direction of the arm 11 (the transfer direction of the new electric wire La). One roller 12 is arranged on each of the front surface (front piece portion 131) and the back surface (rear piece portion 132) of the arm 11, and the upper surface (base body 130) and the front surface (front piece portion 131) of the arm 11 are arranged. The rollers 12 are arranged one by one at the boundary between the upper surface of the arm 11 (base body 130) and the rear surface (rear piece 132).

また、本実施形態に係る仮設鉄塔1,1は、アーム11の延出する方向にも前記ローラ12…が複数配置される。すなわち、本実施形態において、前記ローラ12…は、アーム11の延出する方向と直交する方向で複数列をなすとともにアーム11の延出方向に複数行をなすように配置される。各ローラ12…は、新電線Laの移送方向と交差(直交)する方向(アーム11の延出方向)に延びる回転軸回りで回転自在に構成されており、本実施形態においては、各列で同心に配置される。   In the temporary towers 1 and 1 according to the present embodiment, a plurality of the rollers 12 are also arranged in the extending direction of the arm 11. In other words, in the present embodiment, the rollers 12 are arranged in a plurality of rows in a direction orthogonal to the extending direction of the arms 11 and in a plurality of rows in the extending direction of the arms 11. Each of the rollers 12 is configured to be rotatable around a rotation axis extending in a direction intersecting (orthogonal) with the transfer direction of the new electric wire La (extension direction of the arm 11). Arranged concentrically.

そして、本実施形態に係る仮設鉄塔1,1は、防護ネット17を張設するための台棒14が鉄塔本体10に取り付けられている。該台棒14は、棒状に形成されたもので、アーム11の下方側で且つ二つの仮設鉄塔1,1間に張設した防護ネット17が撓んでも該防護ネット17が要離隔対象物Xに対して必要な離隔距離を確保できる位置(高さ)でアーム11と同方向に延びるよう鉄塔本体10に固定される。本実施形態において、該台棒14は、長手方向の中央部が鉄塔本体10に固定され、鉄塔本体10の両側に延設されたアーム11のそれぞれに対して略全長に亘って対向するようになっている。すなわち、台棒14は、鉄塔本体10の中心を基準にしてアーム11と同等量で延出するようになっている。これにより、アーム11上のローラ12…は、台棒14よりも上方に位置することになり、要離隔対象物Xの最上部に対して必要十分な離隔距離をとった位置に配置されることになる。   In the temporary towers 1 and 1 according to the present embodiment, a support bar 14 for attaching the protection net 17 is attached to the tower body 10. The pedestal 14 is formed in a bar shape, and even if the protective net 17 extending below the arm 11 and between the two temporary steel towers 1 and 1 is bent, the protective net 17 needs to be separated X. Is fixed to the tower main body 10 so as to extend in the same direction as the arm 11 at a position (height) at which a necessary separation distance can be secured. In the present embodiment, the base bar 14 is fixed to the tower main body 10 at the center in the longitudinal direction, and is opposed to each of the arms 11 extending on both sides of the tower main body 10 over substantially the entire length. It has become. That is, the pedestal 14 extends in the same amount as the arm 11 with reference to the center of the steel tower body 10. As a result, the rollers 12 on the arm 11 are positioned above the base bar 14 and are disposed at a position that is necessary and sufficient with respect to the uppermost part of the separation target object X. become.

そして、該台棒14は、鉄塔本体10から延出した部分にアーム11の下面に垂設された支持体(本実施形態においては索条)140が連結されており、該延出した部分に横方向(当該台棒14の延出方向及び上下方向に対して交差する方向)からの引っ張り作用が生じたときに、支持体140を介して引っ張り作用をアーム11に伝達して姿勢を維持できるようになっている。   The support bar 14 is connected to a portion extending from the tower main body 10 with a support body 140 (in this embodiment, a rope) suspended from the lower surface of the arm 11, and the extended portion is connected to the extended portion. When a pulling action from the lateral direction (the direction in which the bar 14 extends and the direction intersecting the vertical direction) occurs, the pulling action can be transmitted to the arm 11 via the support 140 and the posture can be maintained. It is like that.

本実施形態で採用する防護ネット17は、四角形状の網材170と、該網材170の一方向(幅方向)の両端に該一方向と直交する方向(以下、展開方向という)に間隔をあけて取り付けられた複数の小滑車171と、網材170の幅方向の両端のそれぞれに沿って接続された一対の牽引用ロープ172とを備えている。これを前提に、前記台棒14には、防護ネット17を支持するための支持ロープ173を掛止するため滑車(以下、第一滑車という)15と、防護ネット17を展開するための牽引用ロープ172を掛止するための滑車(以下、第二滑車という)16とが取り付けられている。   The protection net 17 employed in the present embodiment has a rectangular mesh material 170 and an interval in one direction (width direction) of the mesh material 170 in a direction perpendicular to the one direction (hereinafter referred to as a deployment direction). A plurality of small pulleys 171 attached in an open manner and a pair of tow ropes 172 connected along both ends in the width direction of the net member 170 are provided. On the assumption of this, a pulley 15 (hereinafter referred to as a first pulley) 15 for hooking a support rope 173 for supporting the protective net 17 and a traction for deploying the protective net 17 are provided on the base bar 14. A pulley (hereinafter referred to as a second pulley) 16 for hooking the rope 172 is attached.

本実施形態に係る工法に採用される仮設鉄塔1,1は、以上の通りであり、続いて、本実施形態に係る工法を適用した新電線Laの架設作業について説明する。   The temporary steel towers 1 and 1 employed in the construction method according to the present embodiment are as described above. Next, the construction work of the new electric wire La to which the construction method according to the present embodiment is applied will be described.

新規の送電系を新設する場合、まず、図4(a)に示す如く、新規に建設された鉄塔Ta,Tb,Tc間にある要離隔対象物Xの近傍に上記構成の仮設鉄塔1,1を建設する。このとき、上下方向から見てアーム11が架設される新電線Laに対して直交するように仮設鉄塔1,1を建設する。すなわち、アーム11上のローラ12…が架設される新電線La(新電線Laの架設予定位置)の真下に位置し、且つ架設される新電線Laに対してローラ12…の回転軸が直交方向に延びるように仮設鉄塔1,1を建設する。   When a new power transmission system is newly installed, first, as shown in FIG. 4 (a), the temporary steel towers 1 and 1 having the above-described configuration are arranged in the vicinity of the separation target object X between the newly constructed steel towers Ta, Tb and Tc. To build. At this time, the temporary steel towers 1 and 1 are constructed so as to be orthogonal to the new electric wire La on which the arm 11 is installed when viewed from the vertical direction. That is, the roller 12 on the arm 11 is positioned directly below the new electric wire La (the planned installation position of the new electric wire La), and the rotation axis of the roller 12 is orthogonal to the new electric wire La to be installed. The temporary steel towers 1 and 1 are constructed to extend to

本実施形態においては、要離隔対象物Xを介在させるように二つの仮設鉄塔1,1を鉄塔Ta,Tb,Tcの並ぶ方向(新電線Laを架設する方向と同方向又は略同方向)に間隔をあけて建設(配置)する。本実施形態においては、仮設鉄塔1,1に台棒14が取り付けられるため、互いの台棒14が対向するように二つの仮設鉄塔1,1を建設する。   In the present embodiment, the two temporary steel towers 1 and 1 are arranged in the direction in which the steel towers Ta, Tb, and Tc are arranged so as to interpose the separation target object X (the same direction or the same direction as the direction in which the new electric wire La is installed). Build (place) at intervals. In this embodiment, since the pedestal 14 is attached to the temporary steel towers 1, 1, the two temporary steel towers 1, 1 are constructed so that the pedestals 14 face each other.

そして、架設区間R内の鉄塔Ta,Tb,Tcのアームに対して金車Wを取り付ける。すなわち、新電線Laを架設する区間(架設区間)Rを画する二つの地点のうちの一方の地点に立設された鉄塔(第一鉄塔)Taのアームと、前記二つの地点のうちの他方の地点に立設された鉄塔(第二鉄塔)Tbのアームとに金車Wを取り付け、さらに、第一鉄塔Ta及び第二鉄塔Tbの間に別の鉄塔(以下、中間鉄塔という)Tcが存在する場合には、該中間鉄塔Tcのアームにも金車Wを取り付ける。なお、鉄塔Ta,Tb,Tcに対する金車Wの取り付けは、仮設鉄塔1,1の建設と併行して行ってもよいし、仮設鉄塔1,1の建設前、又は仮設鉄塔1,1の建設後に行ってもよい。   And the gold wheel W is attached with respect to the arm of the steel towers Ta, Tb, Tc in the construction section R. That is, an arm of a tower (first tower) Ta erected at one of two points that define a section (erection section) R in which the new electric wire La is installed, and the other of the two points A gold wheel W is attached to the arm of a steel tower (second steel tower) Tb erected at the point, and another steel tower (hereinafter referred to as an intermediate steel tower) Tc is provided between the first steel tower Ta and the second steel tower Tb. If present, the gold wheel W is also attached to the arm of the intermediate tower Tc. The metal wheel W may be attached to the steel towers Ta, Tb, Tc in parallel with the construction of the temporary steel towers 1, 1, or before the construction of the temporary steel towers 1, 1 or the construction of the temporary steel towers 1, 1. It may be done later.

なお、図4及び図5において、架設区間R内に第一鉄塔Ta及び第二鉄塔Tbに加えて一つの中間鉄塔Tcが存在する場合を一例に、これらの三つの鉄塔Ta,Tb,Tc(第一鉄塔Ta、第二鉄塔Tb、中間鉄塔Tc)のアームに金車Wを取り付けて新電線Laを架設する状態を示しているが、例えば、架設区間R内に第一鉄塔Ta及び第二鉄塔Tbのみ存在する場合には、第一鉄塔Ta及び第二鉄塔Tbのそれぞれのアームに金車Wを取り付けて新電線Laを架設すればよいし、架設区間R内に第一鉄塔Ta及び第二鉄塔Tbに加えて二つ以上の中間鉄塔Tcが存在する場合には、第一鉄塔Ta及び第二鉄塔Tbに加えて各中間鉄塔Tcのアームに金車Wを取り付けて新電線Laを架設すればよい。   4 and 5, in the case where one intermediate iron tower Tc is present in addition to the first iron tower Ta and the second iron tower Tb in the installation section R, these three iron towers Ta, Tb, Tc ( The state where the new wheel La is installed by attaching the gold wheel W to the arms of the first tower Ta, the second tower Tb, and the intermediate tower Tc) is shown. When only the steel tower Tb exists, a new electric wire La may be installed by attaching a gold wheel W to each arm of the first steel tower Ta and the second steel tower Tb. When there are two or more intermediate towers Tc in addition to the two towers Tb, a new electric wire La is installed by attaching a gold wheel W to the arm of each intermediate tower Tc in addition to the first tower Ta and the second tower Tb. do it.

また、図4及び図5において、第一鉄塔Taと中間鉄塔Tcとの間に要離隔対象物Xが存在する場合を例示しているが、例えば、第一鉄塔Taと中間鉄塔Tcとの間の他、第二鉄塔Tbと中間鉄塔Tcとの間や、中間鉄塔Tcと中間鉄塔Tcとの間に要離隔対象物Xが存在する場合には、各要離隔対象物Xの近傍に仮設鉄塔1,1を建設すればよく、隣り合う鉄塔Ta,Tb,Tc間に複数の要離隔対象物Xが存在する場合には、各要離隔対象物Xの近傍に仮設鉄塔1,1を建設してもよいが、要離隔対象物X同士の間隔が狭い場合には、これらに対して一つ又は二つの仮設鉄塔1,1を建設してもよい。   Moreover, in FIG.4 and FIG.5, although the case where the separation required object X exists between the 1st iron tower Ta and the intermediate iron tower Tc is illustrated, for example, between 1st iron tower Ta and the intermediate iron tower Tc In addition, when there is a required separation object X between the second iron tower Tb and the intermediate iron tower Tc, or between the intermediate iron tower Tc and the intermediate iron tower Tc, a temporary steel tower in the vicinity of each separation object X 1 and 1 may be constructed, and when there are a plurality of separation target objects X between adjacent towers Ta, Tb and Tc, temporary steel towers 1 and 1 are constructed in the vicinity of each separation object X. However, when the space | interval of the separation required objects X is narrow, you may construct one or two temporary steel towers 1 and 1 with respect to these.

そして、二つの仮設鉄塔1,1を建設した後、仮設鉄塔1,1間に防護ネット17を張設する。具体的には、図2及び図3に示す如く、防護ネット17(網材170)の幅方向の両端にある小滑車171に対して支持ロープ173を展開方向に挿通して二つの仮設鉄塔1,1のそれぞれの台棒14に取り付けた第一滑車15に対して架け渡すとともに、牽引用ロープ172を二つの仮設鉄塔1,1のそれぞれの台棒14に取り付けた第二滑車16に対して架け渡す。その後、支持ロープ173の両端を引っ張って該支持ロープ173を緊張状態し、該緊張状態にある支持ロープ173の両端を固定する。これにより、網材170の幅方向の両端が小滑車171を介して支持ロープ173に引き上げられ、防護ネット17全体が適正な位置(要離隔対象物Xに対して必要な離隔距離離れた位置)にまで持ち上げられることになる。   And after constructing the two temporary steel towers 1, 1, the protective net 17 is stretched between the temporary steel towers 1, 1. Specifically, as shown in FIG. 2 and FIG. 3, two temporary steel towers 1 are inserted by inserting support ropes 173 in the deployment direction with respect to small pulleys 171 at both ends in the width direction of the protective net 17 (net material 170). , 1 over the first pulley 15 attached to the respective base rods 14, and to the second pulley 16 attached with the tow ropes 172 to the respective base rods 14 of the two temporary towers 1, 1. Cross over. Thereafter, both ends of the support rope 173 are pulled to tension the support rope 173, and both ends of the support rope 173 in the tension state are fixed. As a result, both ends in the width direction of the mesh material 170 are pulled up to the support rope 173 via the small pulley 171, and the entire protective net 17 is in an appropriate position (a position away from the required separation object X). It will be lifted up to.

このように防護ネット17が適正な位置にまで引き上げられた状態で、牽引用ロープ172の両端を引っ張って該牽引用ロープ172を引き延ばす。このよう牽引用ロープ172を引き延ばすと、網材170の幅方向の両端に取り付けられた小滑車171が二つの仮設鉄塔1,1間に緊張状態で架設された支持ロープ173上で走行し、網材170が仮設鉄塔1,1間に展開することになる。その後、牽引用ロープ172を引っ張った状態(網材170を展開した状態)で固定することで、防護ネット17(網材170)は、要離隔対象物Xの最上部から上方側に必要な離隔距離以上離れて新電線Laよりも下側になる位置で二つの仮設鉄塔1,1間に跨るように張設されることになる。   In a state where the protective net 17 is pulled up to an appropriate position as described above, both ends of the tow rope 172 are pulled to extend the tow rope 172. When the pulling rope 172 is extended in this manner, the pulleys 171 attached to both ends in the width direction of the mesh material 170 travel on the support ropes 173 laid in tension between the two temporary towers 1 and 1. The material 170 expands between the temporary steel towers 1 and 1. Thereafter, the protection net 17 (the net member 170) is separated from the uppermost portion of the separation target object X by a necessary distance by fixing the pulling rope 172 in a pulled state (a state in which the net member 170 is deployed). It is stretched so as to straddle between the two temporary steel towers 1 and 1 at a position that is more than the distance away and below the new electric wire La.

このように仮設鉄塔1,1を建設して仮設鉄塔1,1間に防護ネット17を張設した後、図4(b)に示す如く、ヘリコプター(図示しない)を利用して架設区間R内にある第一鉄塔Ta、中間鉄塔Tc、及び第二鉄塔TbにロープLcを架け渡す。このとき、要離隔対象物Xの存在する鉄塔Ta,Tc間のロープLcは、仮設鉄塔1,1に取り付けたローラ12…上に配置される。そして、ロープLcを第一鉄塔Ta、中間鉄塔Tc、及び第二鉄塔Tbのそれぞれの金車Wに挿通した上で、第一鉄塔Taの近傍のドラム場Dに設置した電線送出装置2から引き出した新電線Laの先端にロープLcの一端を接続するとともに、前記第二鉄塔Tbの近傍のエンジン場Eに設置した巻取装置3にロープLcの他端を導入する。すなわち、ロープLcの他端を巻取装置3のリールワインダ(採番しない)に連結し、ロープLcを巻き取り可能な状態にする。   After the temporary towers 1 and 1 are constructed in this way and the protective net 17 is stretched between the temporary towers 1 and 1, as shown in FIG. 4 (b), a helicopter (not shown) is used in the construction section R. The rope Lc is bridged over the first iron tower Ta, the intermediate iron tower Tc, and the second iron tower Tb. At this time, the rope Lc between the steel towers Ta and Tc where the separation target object X exists is disposed on the rollers 12 attached to the temporary steel towers 1 and 1. Then, after the rope Lc is inserted into the respective gold wheels W of the first iron tower Ta, the intermediate iron tower Tc, and the second iron tower Tb, the rope Lc is pulled out from the electric wire feeder 2 installed in the drum field D in the vicinity of the first iron tower Ta. One end of the rope Lc is connected to the tip of the new electric wire La, and the other end of the rope Lc is introduced into the winding device 3 installed in the engine field E in the vicinity of the second steel tower Tb. That is, the other end of the rope Lc is connected to a reel winder (not numbered) of the winding device 3 so that the rope Lc can be wound.

そして、図5(a)に示す如く、電線送出装置2で新電線Laを送りだしつつ該新電線Laに接続したロープLcを巻取装置3で巻き取ると、新電線Laが長手方向に引っ張られて第一鉄塔Ta側から第二鉄塔Tb側に向けて移動することになる。すなわち、電線送出装置2から送り出された新電線Laは、ロープLcの移動経路を辿るようにして移動することになる。従って、該新電線Laは、要離隔対象物X上を通過するときに仮設鉄塔1,1に取り付けたローラ12…に支持された状態になり、要離隔対象物Xの最上部に対して必要な離隔距離をあけた状態で要離隔対象物X上を通過することになる。   As shown in FIG. 5A, when the rope Lc connected to the new electric wire La is taken up by the winding device 3 while the new electric wire La is sent out by the electric wire sending device 2, the new electric wire La is pulled in the longitudinal direction. Thus, the first steel tower Ta side moves toward the second steel tower Tb side. That is, the new electric wire La sent out from the electric wire sending device 2 moves so as to follow the moving path of the rope Lc. Accordingly, the new electric wire La is supported by the rollers 12 attached to the temporary towers 1 and 1 when passing over the object X requiring separation, and is necessary for the uppermost part of the object X requiring separation. It passes over the separation target object X in a state with a large separation distance.

本実施形態においては、前記ローラ12…が軸心方向の中央から両端に向けて拡径しているため、移送中の新電線La(及び新電線Laに対して先行するロープLc)がローラ12…の軸心方向の何れか一端側に位置変更しようとしてもローラ12…の軸心方向の中央部に導かれることになり、新電線La(及び新電線Laに対して先行するロープLc)をローラ12…から離脱させることなく確実に支持することができる。すなわち、移送中の新電線La(及び新電線Laに対して先行するロープLc)は、一定又は略一定の引っ張り力が作用すると略一定の軌道を通るようにローラ12…上を移動することになる。   In the present embodiment, since the rollers 12 are increased in diameter from the center in the axial direction toward both ends, the new electric wire La (and the rope Lc preceding the new electric wire La) being transferred becomes the roller 12. Even if the position is changed to one end in the axial direction of ..., the roller 12 will be guided to the central part in the axial direction of the roller 12, and the new electric wire La (and the rope Lc preceding the new electric wire La) It can be reliably supported without being separated from the rollers 12. That is, the new electric wire La being transferred (and the rope Lc preceding the new electric wire La) moves on the rollers 12 to pass through a substantially constant track when a constant or substantially constant tensile force is applied. Become.

また、新電線La(及び新電線Laに対して先行するロープLc)を移送させるに当り、何らかの要因で新電線La(及び新電線Laに対して先行するロープLc)に対する引っ張り力が変動したり外的な要因(例えば、風)で新電線La(及び新電線Laに対して先行するロープLc)に引っ張り方向と異なる方向の力が作用したりした場合には、該新電線La(及び新電線Laに対して先行するロープLc)がローラ12…から一時的に浮き上がって横ぶれすることもあるが、本実施形態においては、アーム11の延出方向に複数のローラ12…を配置するようにしているため、何れかのローラ12…上に着地することになり、新電線La(及び新電線Laに対して先行するロープLc)の安定した移送が可能となる。   In addition, when the new electric wire La (and the rope Lc preceding the new electric wire La) is transferred, the pulling force on the new electric wire La (and the rope Lc preceding the new electric wire La) varies for some reason. When a force in a direction different from the pulling direction acts on the new electric wire La (and the rope Lc preceding the new electric wire La) due to an external factor (for example, wind), the new electric wire La (and the new electric wire La (and the new electric wire La) The rope Lc) preceding the electric wire La may temporarily float from the rollers 12 and sway, but in the present embodiment, a plurality of rollers 12 are arranged in the extending direction of the arm 11. Therefore, it will land on one of the rollers 12... And the new electric wire La (and the rope Lc preceding the new electric wire La) can be stably transferred.

そして、架設区間R内の鉄塔Ta,Tb,Tc(第一鉄塔Ta、中間鉄塔Tc、及び第二鉄塔Tb)に新電線Laが架け渡されると、巻取装置3による巻き取りを停止する。すなわち、架設区間Rの全域に新電線Laが行き渡ると、電線送出装置2による新電線Laの送り出しと巻取装置3による巻き取りを停止する。このとき、鉄塔Ta,Tb,Tc間にある新電線Laが移送時よりも大きく撓むことのないように、該新電線Laに対して移送時と同様の引っ張り力を作用させた状態で維持するように電線送出装置2及び巻取装置3を停止する。   And when the new electric wire La is bridged over the steel towers Ta, Tb, Tc (the first steel tower Ta, the intermediate steel tower Tc, and the second steel tower Tb) in the construction section R, the winding by the winding device 3 is stopped. That is, when the new electric wire La reaches the entire construction section R, the feeding of the new electric wire La by the electric wire feeding device 2 and the winding by the winding device 3 are stopped. At this time, the new electric wire La between the steel towers Ta, Tb, and Tc is maintained in a state in which the same tensile force as that at the time of transfer is applied to the new electric wire La so that the new electric wire La does not bend more greatly than at the time of transfer. Then, the electric wire feeding device 2 and the winding device 3 are stopped.

しかる後、第一鉄塔Ta、中間鉄塔Tc、及び第二鉄塔Tbのそれぞれの金車Wから新電線Laを取り外した上で、図5(b)に示す如く、新電線Laを各鉄塔Ta,Tb,Tcのアームに取り付けられた碍子(一般的には複数の碍子を連ねた碍子連)に連結する。   Thereafter, after removing the new electric wires La from the respective gold wheels W of the first iron tower Ta, the intermediate iron tower Tc, and the second iron tower Tb, as shown in FIG. It is connected to an insulator (generally an insulator series in which a plurality of insulators are connected) attached to the arms of Tb and Tc.

このとき、鉄塔Ta,Tb,Tc間にある新電線Laに対して中間鉄塔Tcを介して第一鉄塔Taから第二鉄塔Tbに架け渡すときの引っ張り力(巻取装置3による引っ張り力)よりも大きな張力F,Fを作用させることで、鉄塔Ta,Tb,Tc間の新電線Laは、張力F,Fの作用で撓みが吸収されてローラ12…から上方に向けて移動することになる。すなわち、要離隔対象物Xの近傍に構築した仮設鉄塔1,1に取り付けたローラ12…に新電線Laを支持させているが、該ローラ12…の上方側が開放状態になっているため、ローラ12…に支持された新電線Laの上方側への移動が許容されることになる。   At this time, from the pulling force (the pulling force by the winding device 3) when the new electric wire La between the towers Ta, Tb and Tc is bridged from the first tower Ta to the second tower Tb via the intermediate tower Tc. By applying a large tension F, F, the new electric wire La between the steel towers Ta, Tb, Tc is absorbed by the action of the tension F, F and moves upward from the rollers 12. . That is, the new electric wire La is supported by the rollers 12 attached to the temporary steel towers 1 and 1 constructed in the vicinity of the separation target object X. However, since the upper side of the rollers 12 is open, the rollers The upward movement of the new electric wires La supported by 12... Is allowed.

従って、上述の如く、新電線Laが鉄塔Ta,Tb,Tcに架け渡された後に該新電線Laに対して大きな張力F,Fを作用させることで、新電線Laが移動を阻害されることなく適正な架設位置(送電するときに適正とされる位置)にまで移動することになる。なお、本実施形態においては、架設区間R内に複数の鉄塔Ta,Tb,Tcが存在するため、第一鉄塔Ta又は第二鉄塔Tbの何れか一方から他方に向けて各鉄塔Ta,Tb,Tcに対して新電線Laを連結するが、この際、第一鉄塔Ta又は第二鉄塔Tbの何れか一方と隣り合う別の鉄塔Ta,Tb,Tc側に新電線Laを引っ張りつつ、該別の鉄塔Ta,Tb,Tc(碍子)に新電線Laを連結していくことで、各鉄塔Ta,Tb,Tc間の新電線Laは、余分な撓みが吸収されて適正な架設位置に配置されることになる。   Therefore, as described above, when the new electric wire La is stretched over the steel towers Ta, Tb, and Tc, the movement of the new electric wire La is inhibited by applying a large tension F, F to the new electric wire La. It moves to an appropriate installation position (position appropriate for power transmission). In the present embodiment, since there are a plurality of steel towers Ta, Tb, Tc in the erection section R, each steel tower Ta, Tb, The new electric wire La is connected to Tc. At this time, the new electric wire La is pulled toward another iron tower Ta, Tb, Tc adjacent to either the first iron tower Ta or the second iron tower Tb. By connecting the new electric wires La to the steel towers Ta, Tb, Tc (insulators), the new electric wires La between the steel towers Ta, Tb, Tc are arranged at the proper erection positions because the excessive deflection is absorbed. Will be.

そして、新電線Laが鉄塔Ta,Tb,Tcに連結されて適正な架設位置(送電するときに適正とされる位置)になった後に、防護ネット17を取り外した後に仮設鉄塔1,1を解体することで一例の作業が完了する。なお、新電線Laを鉄塔Ta,Tb,Tc(碍子)に連結した後に、巻取装置3や電線送出装置2についても撤去される。そして、その他の架設区間Rに対しても同様に新電線Laを架設することで、図1に示す如く、新規の送電系が完成する。   Then, after the new electric wire La is connected to the towers Ta, Tb, and Tc to be in an appropriate erection position (position appropriate for power transmission), the temporary steel towers 1 and 1 are disassembled after the protective net 17 is removed. This completes an example operation. In addition, after connecting the new electric wire La to the steel towers Ta, Tb, and Tc (insulator), the winding device 3 and the electric wire feeding device 2 are also removed. Then, a new electric power transmission line La is similarly installed in the other installation sections R, whereby a new power transmission system is completed as shown in FIG.

次に、図6に示す如く、新電線の交換の対象となる架設区間Rに架設された電線(以下、旧電線)Lbを新電線に交換する作業について説明する。まず、図7(a)に示す如く、鉄塔Ta,Tb,Tc間にある要離隔対象物Xの近傍に上記構成の仮設鉄塔1,1を建設する。このとき、仮設鉄塔1,1は、上下方向から見てアーム11が旧電線Lbに対して直交するように建設される。すなわち、仮設鉄塔1,1は、アーム11上のローラ12…が旧電線Lb(新電線の架設予定位置)の真下に位置し、且つローラ12…の回転軸が架設される旧電線Lbに対して直交方向に延びるように建設される。   Next, as shown in FIG. 6, an operation of replacing an electric wire (hereinafter referred to as an old electric wire) Lb installed in an installation section R to be replaced with a new electric wire with a new electric wire will be described. First, as shown in FIG. 7 (a), the temporary steel towers 1 and 1 having the above-described structure are constructed in the vicinity of the required separation object X between the steel towers Ta, Tb, and Tc. At this time, the temporary steel towers 1 and 1 are constructed so that the arm 11 is orthogonal to the old electric wire Lb when viewed in the vertical direction. That is, the temporary steel towers 1 and 1 are configured so that the rollers 12 on the arm 11 are positioned directly below the old electric wire Lb (the position where the new electric wire is to be installed) and the rotating shaft of the roller 12 is installed on the old electric wire Lb. It is constructed to extend in the orthogonal direction.

また、新電線の交換(架設)の対象となる架設区間R内の鉄塔Ta,Tb,Tcのアームに対して金車Wを取り付ける。すなわち、旧電線Lbを新電線Laに交換する架設区間Rを画する二つの地点のうちの一方の地点に立設された第一鉄塔Taのアームと、前記二つの地点のうちの他方の地点に立設された第二鉄塔Tbのアームとに金車Wを取り付け、さらに、第一鉄塔Ta及び第二鉄塔Tbの間に別の鉄塔Ta,Tb,Tc(以下、中間鉄塔Tcという)が存在する場合には、該中間鉄塔Tcのアームにも金車Wを取り付ける。   Further, the gold wheel W is attached to the arm of the steel towers Ta, Tb, Tc in the installation section R which is a target for replacement (installation) of the new electric wire. That is, the arm of the first tower Ta erected at one of the two points that define the installation section R where the old electric wire Lb is replaced with the new electric wire La, and the other of the two points A metal wheel W is attached to the arm of the second steel tower Tb standing upright, and another steel tower Ta, Tb, Tc (hereinafter referred to as an intermediate steel tower Tc) is provided between the first steel tower Ta and the second steel tower Tb. If present, the gold wheel W is also attached to the arm of the intermediate tower Tc.

なお、図7及び図8において、新電線Laを架設する架設区間R内に第一鉄塔Ta及び第二鉄塔Tbに加えて一つの中間鉄塔Tcが存在する場合を一例に、これらの三つの鉄塔Ta,Tb,Tc(第一鉄塔Ta、第二鉄塔Tb、中間鉄塔Tc)のアームに金車Wを取り付けて新電線Laを架設する状態を示しているが、例えば、新電線Laを架設する架設区間R内に第一鉄塔Ta及び第二鉄塔Tbのみ存在する場合には、第一鉄塔Ta及び第二鉄塔Tbのそれぞれのアームに金車Wを取り付けて新電線Laを架設すればよいし、新電線Laを架設する架設区間R内に第一鉄塔Ta及び第二鉄塔Tbに加えて二つ以上の中間鉄塔Tcが存在する場合には、第一鉄塔Ta及び第二鉄塔Tbに加えて各中間鉄塔Tcのアームに金車Wを取り付けて新電線Laを架設すればよい。   In FIGS. 7 and 8, these three steel towers are taken as an example in which one intermediate iron tower Tc exists in addition to the first iron tower Ta and the second iron tower Tb in the construction section R where the new electric wire La is constructed. Although the state where the gold wheel W is attached to the arm of Ta, Tb, Tc (the first iron tower Ta, the second iron tower Tb, the intermediate iron tower Tc) and the new electric wire La is installed is shown, for example, the new electric wire La is installed. When only the first iron tower Ta and the second iron tower Tb exist in the construction section R, the new electric wire La may be installed by attaching the gold wheel W to each arm of the first iron tower Ta and the second iron tower Tb. When there are two or more intermediate iron towers Tc in addition to the first iron tower Ta and the second iron tower Tb in the installation section R where the new electric wire La is installed, in addition to the first iron tower Ta and the second iron tower Tb A new gold wheel W is attached to the arm of each intermediate tower Tc. It can be bridged the line La.

また、図7及び図8において、第一鉄塔Taと中間鉄塔Tcとの間に要離隔対象物Xが存在する場合を例示しているが、例えば、第一鉄塔Taと中間鉄塔Tcとの間の他、第二鉄塔Tbと中間鉄塔Tcとの間や、中間鉄塔Tcと中間鉄塔Tcとの間に要離隔対象物Xが存在する場合には、各要離隔対象物Xの近傍に仮設鉄塔1,1を建設すればよい。隣り合う鉄塔Ta,Tb,Tc間に複数の要離隔対象物Xが存在する場合には、各要離隔対象物Xの近傍に仮設鉄塔1,1を建設してもよいが、要離隔対象物X同士の間隔が狭い場合には、これらに対して一つ又は二つの仮設鉄塔1,1を建設してもよい。   Moreover, in FIG.7 and FIG.8, although the case where the separation required object X exists between the 1st iron tower Ta and the intermediate iron tower Tc is illustrated, for example, between the 1st iron tower Ta and the intermediate iron tower Tc In addition, when there is a required separation object X between the second iron tower Tb and the intermediate iron tower Tc, or between the intermediate iron tower Tc and the intermediate iron tower Tc, a temporary steel tower in the vicinity of each separation object X 1, 1 should be constructed. When there are a plurality of required separation objects X between adjacent steel towers Ta, Tb, Tc, temporary steel towers 1 and 1 may be constructed in the vicinity of each necessary separation object X. When the interval between X is narrow, one or two temporary steel towers 1 and 1 may be constructed for these.

そして、本実施形態においては、要離隔対象物Xを介在させるように鉄塔Ta,Tb,Tcの並ぶ方向(新電線Laを架設する方向と同方向又は略同方向)に間隔をあけて二つの仮設鉄塔1,1を配置(建設)した上で、防護ネット17を張設する。なお、防護ネット17の張設方法は、新規の送電系を構築するときと同様であるため、ここでの説明は割愛する。   And in this embodiment, two space | intervals are spaced apart in the direction (same direction or the same direction as the direction which constructs the new electric wire La) where the towers Ta, Tb, and Tc are arranged so that the separation target object X is interposed. After the temporary steel towers 1 and 1 are arranged (constructed), the protective net 17 is stretched. In addition, since the installation method of the protection net | network 17 is the same as that when constructing a new power transmission system, description here is omitted.

そして、架設区間R内にある鉄塔Ta,Tb,Tcのうち、少なくとも架設区間Rを画する二つの地点にある第一鉄塔Ta及び第二鉄塔Tbに対して旧電線Lbを直接又は間接的に仮止めし、旧電線Lbの交換の対象となる部分が鉄塔Ta,Tb,Tcに仮支持された状態で維持されるように旧電線Lbを切断する。そして、図7(b)に示す如く、要離隔対象物Xの存在する鉄塔Ta,Tb,Tc間の旧電線Lbが仮設鉄塔1,1に取り付けたローラ12…上に配置されるように該旧電線Lbの引っ張り状態を弛めるとともに該旧電線Lbを第一鉄塔Ta、第二鉄塔Tb、及び中間鉄塔Tcのそれぞれの金車Wに挿通する。そして、第一鉄塔Taの近傍のドラム場Dに設置した電線送出装置2から引き出した新電線Laの先端に旧電線Lbの一端を接続するとともに、第二鉄塔Tbの近傍のエンジン場Eに設置した巻取装置3のリールワインダ(採番しない)に連結されたロープLcの後端と連結する。すなわち、ロープLc及び旧電線Lbを巻取装置3で巻き取り可能な状態にする。   And among the towers Ta, Tb, and Tc in the installation section R, the old electric wire Lb is directly or indirectly connected to the first tower Ta and the second tower Tb at least at two points that define the installation section R. The old electric wire Lb is cut so that the part to be replaced is temporarily supported by the steel towers Ta, Tb, and Tc. Then, as shown in FIG. 7B, the old electric wire Lb between the steel towers Ta, Tb, Tc where the separation target object X exists is disposed on the rollers 12 attached to the temporary steel towers 1, 1. The old electric wire Lb is loosened and the old electric wire Lb is inserted into the gold wheels W of the first iron tower Ta, the second iron tower Tb, and the intermediate iron tower Tc. And while connecting the end of the old electric wire Lb to the front-end | tip of the new electric wire La pulled out from the electric wire delivery apparatus 2 installed in the drum field D in the vicinity of the 1st steel tower Ta, it installs in the engine field E in the vicinity of the 2nd steel tower Tb. The rope Lc connected to the reel winder (not numbered) of the winding device 3 is connected to the rear end of the rope Lc. That is, the rope Lc and the old electric wire Lb are brought into a state where they can be wound by the winding device 3.

そして、図8(a)に示す如く、電線送出装置2で新電線Laを送りだしつつ該新電線Laに接続したロープLc及び旧電線Lbを巻取装置3で巻き取ると、新電線Laが長手方向に引っ張られて第一鉄塔Ta側から第二鉄塔Tb側に向けて移動することになる。すなわち、電線送出装置2から送り出された新電線Laは、旧電線Lbの移動経路を辿るようにして移動することになる。従って、該新電線Laは、要離隔対象物X上を通過するときに仮設鉄塔1,1に取り付けたローラ12…に支持された状態になり、要離隔対象物Xの最上部に対して必要な離隔距離をあけた状態で要離隔対象物X上を通過することになる。   Then, as shown in FIG. 8A, when the rope Lc connected to the new electric wire La and the old electric wire Lb are taken up by the winding device 3 while the new electric wire La is sent out by the electric wire sending device 2, the new electric wire La becomes long. It is pulled in the direction and moves from the first iron tower Ta side toward the second iron tower Tb side. That is, the new electric wire La sent out from the electric wire sending device 2 moves so as to follow the moving path of the old electric wire Lb. Accordingly, the new electric wire La is supported by the rollers 12 attached to the temporary towers 1 and 1 when passing over the object X requiring separation, and is necessary for the uppermost part of the object X requiring separation. It passes over the separation target object X in a state with a large separation distance.

本実施形態においては、前記ローラ12…が軸心方向の中央から両端に向けて拡径しているため、移送中の新電線La(及び新電線Laに対して先行する旧電線Lb)がローラ12…の軸心方向の何れか一端側に位置変更しようとしてもローラ12…の軸心方向の中央部に導かれることになり、新電線La(及び新電線Laに対して先行する旧電線Lb)をローラ12…から離脱させることなく確実に支持することができる。すなわち、移送中の新電線La(及び新電線Laに対して先行する旧電線Lb)は、一定又は略一定の引っ張り力が作用すると略一定の軌道を通るようにローラ12…上を移動することになる。   In the present embodiment, since the rollers 12 are increased in diameter from the center in the axial direction toward both ends, the new electric wire La being transferred (and the old electric wire Lb preceding the new electric wire La) is a roller. 12... Even if the position is changed to one end side in the axial direction of 12..., It will be guided to the central portion in the axial direction of the rollers 12 and the old electric wire Lb preceding the new electric wire La (and the new electric wire La). ) Can be reliably supported without being separated from the rollers 12. That is, the new electric wire La being transferred (and the old electric wire Lb preceding the new electric wire La) moves on the rollers 12 to pass through a substantially constant track when a constant or substantially constant pulling force is applied. become.

また、新電線La(及び新電線Laに対して先行する旧電線Lb)を移送させるに当り、何らかの要因で新電線La(及び新電線Laに対して先行する旧電線Lb)に対する引っ張り力が変動したり外的な要因(例えば、風)で新電線La(及び新電線Laに対して先行する旧電線Lb)に引っ張り方向と異なる方向の力が作用したりした場合には、該新電線La(及び新電線Laに対して先行する旧電線Lb)がローラ12…から一時的に浮き上がって横ぶれすることもあるが、本実施形態においては、アーム11の延出方向に複数のローラ12…を配置するようにしているため、何れかのローラ12…上に着地することになり、新電線La(及び新電線Laに対して先行する旧電線Lb)の安定した移送が可能となる。   Further, when the new electric wire La (and the old electric wire Lb preceding the new electric wire La) is transferred, the pulling force on the new electric wire La (and the old electric wire Lb preceding the new electric wire La) fluctuates for some reason. If a force in a direction different from the pulling direction acts on the new electric wire La (and the old electric wire Lb preceding the new electric wire La) due to external factors (for example, wind), the new electric wire La (And the old electric wire Lb that precedes the new electric wire La) may be temporarily lifted from the rollers 12 and sway, but in the present embodiment, a plurality of rollers 12 in the extending direction of the arm 11. Are arranged on one of the rollers 12..., And the new electric wire La (and the old electric wire Lb preceding the new electric wire La) can be stably transferred.

そして、架設区間R内の鉄塔Ta,Tb,Tc(第一鉄塔Ta、中間鉄塔Tc、及び第二鉄塔Tb)に新電線Laが架け渡されると、巻取装置3による巻き取りを停止する。すなわち、延線の対象区間の全域に新電線Laが行き渡ると、電線送出装置2による新電線Laの送り出しと巻取装置3による巻き取りを停止する。このとき、鉄塔Ta,Tb,Tc間にある新電線Laが移送時よりも大きく撓むことのないように、該新電線Laに対して移送時と同様の引っ張り力を作用させた状態で維持するように電線送出装置2及び巻取装置3を停止する。   And when the new electric wire La is bridged over the steel towers Ta, Tb, Tc (the first steel tower Ta, the intermediate steel tower Tc, and the second steel tower Tb) in the construction section R, the winding by the winding device 3 is stopped. That is, when the new electric wire La reaches the entire area of the target section of the wire drawing, the feeding of the new electric wire La by the wire feeding device 2 and the winding by the winding device 3 are stopped. At this time, the new electric wire La between the steel towers Ta, Tb, and Tc is maintained in a state in which the same tensile force as that at the time of transfer is applied to the new electric wire La so that the new electric wire La does not bend more greatly than at the time of transfer. Then, the electric wire feeding device 2 and the winding device 3 are stopped.

しかる後、第一鉄塔Ta、中間鉄塔Tc、及び第二鉄塔Tbのそれぞれの金車Wから新電線Laを取り外した上で、図8(b)に示す如く、新電線Laを各鉄塔Ta,Tb,Tcのアームに取り付けられた碍子(一般的には複数の碍子を連ねた碍子連)に連結する。   Thereafter, after removing the new electric wires La from the respective gold wheels W of the first iron tower Ta, the intermediate iron tower Tc, and the second iron tower Tb, as shown in FIG. It is connected to an insulator (generally an insulator series in which a plurality of insulators are connected) attached to the arms of Tb and Tc.

このとき、鉄塔Ta,Tb,Tc間にある新電線Laに対して中間鉄塔Tcを介して第一鉄塔Taから第二鉄塔Tbに架け渡すときの引っ張り力(巻取装置3による引っ張り力)よりも大きな張力F,Fを作用させることで、鉄塔Ta,Tb,Tc間の新電線Laは、張力F,Fの作用で撓みが吸収されてローラ12…から上方に向けて移動することになる。すなわち、要離隔対象物Xの近傍に構築した仮設鉄塔1,1に取り付けたローラ12…に新電線Laを支持させているが、該ローラ12…の上方側が開放状態になっているため、ローラ12…に支持された新電線Laの上方側(開放空間)への移動が許容されることになる。   At this time, from the pulling force (the pulling force by the winding device 3) when the new electric wire La between the towers Ta, Tb and Tc is bridged from the first tower Ta to the second tower Tb via the intermediate tower Tc. By applying a large tension F, F, the new electric wire La between the steel towers Ta, Tb, Tc is absorbed by the action of the tension F, F and moves upward from the rollers 12. . That is, the new electric wire La is supported by the rollers 12 attached to the temporary steel towers 1 and 1 constructed in the vicinity of the separation target object X. However, since the upper side of the rollers 12 is open, the rollers Movement of the new electric wire La supported by 12 ... to the upper side (open space) is permitted.

従って、上述の如く、新電線Laが鉄塔Ta,Tb,Tcに架け渡された後に該新電線Laに対して大きな張力F,Fを作用させることで、新電線Laが移動を阻害されることなく適正な架設位置(送電するときに適正とされる位置)にまで移動することになる。なお、本実施形態においては、架設区間R内に複数の鉄塔Ta,Tb,Tcが存在するため、第一鉄塔Ta又は第二鉄塔Tbの何れか一方から他方に向けて各鉄塔Ta,Tb,Tcに対して新電線Laを連結するが、この際、第一鉄塔Ta又は第二鉄塔Tbの何れか一方と隣り合う別の鉄塔Ta,Tb,Tc側に新電線Laを引っ張りつつ、該別の鉄塔Ta,Tb,Tc(碍子)に新電線Laを連結していくことで、各鉄塔Ta,Tb,Tc間の新電線Laは、余分な撓みが吸収されて適正な架設位置に配置されることになる。   Therefore, as described above, when the new electric wire La is stretched over the steel towers Ta, Tb, and Tc, the movement of the new electric wire La is inhibited by applying a large tension F, F to the new electric wire La. It moves to an appropriate installation position (position appropriate for power transmission). In the present embodiment, since there are a plurality of steel towers Ta, Tb, Tc in the erection section R, each steel tower Ta, Tb, The new electric wire La is connected to Tc. At this time, the new electric wire La is pulled toward another iron tower Ta, Tb, Tc adjacent to either the first iron tower Ta or the second iron tower Tb. By connecting the new electric wires La to the steel towers Ta, Tb, Tc (insulators), the new electric wires La between the steel towers Ta, Tb, Tc are arranged at the proper erection positions because the excessive deflection is absorbed. Will be.

そして、新電線Laが鉄塔Ta,Tb,Tcに連結されて適正な架設位置(送電するときに適正とされる位置)になった後に、防護ネット17を取り外した後に仮設鉄塔1,1を解体することで一例の作業が完了する。なお、新電線Laを鉄塔Ta,Tb,Tc(碍子)に連結した後に、巻取装置3や電線送出装置2についても撤去される。そして、鉄塔Ta,Tb,Tc間に架設した新電線Laを交換の対象となっていない旧電線Lbと接続したり、その他の架設区間Rに対しても同様に新電線Laを架設し、該新電線Laを先に架設した新電線Laと接続したりすることで、送電可能な送電系にすることができる。   Then, after the new electric wire La is connected to the towers Ta, Tb, and Tc to be in an appropriate erection position (position appropriate for power transmission), the temporary steel towers 1 and 1 are disassembled after the protective net 17 is removed. This completes an example operation. In addition, after connecting the new electric wire La to the steel towers Ta, Tb, and Tc (insulator), the winding device 3 and the electric wire feeding device 2 are also removed. Then, the new electric wire La installed between the steel towers Ta, Tb, Tc is connected to the old electric wire Lb not to be exchanged, or the new electric wire La is installed in the same manner for the other installation sections R, By connecting the new electric wire La to the new electric wire La previously installed, a power transmission system capable of transmitting power can be obtained.

以上のように、本実施形態に係る電線延線工法は、電線Lを架け渡す架設区間Rを画する二つの地点のうちの一方の地点に立設された鉄塔Ta側から送り出した新電線Laを前記二つの地点のうちの他方の地点に立設された鉄塔Tb側に引っ張り、鉄塔Ta,Tc間にある要離隔対象物Xから必要な離隔距離をあけた上方位置で前記新電線Laを前記二つの地点にある鉄塔Ta,Tbに架け渡すための電線延線工法であって、前記要離隔対象物Xの近傍に配置された構造物1,1における上方側が開放状態になった位置に取り付けたローラ12…に、鉄塔Ta,Tc間にある新電線Laを要離隔対象物Xの最上部から必要な離隔距離以上離れた高位置で支持させるため、要離隔対象物Xに対して必要十分な離隔距離をとって新電線Laを移送できる上に、鉄塔Ta,Tb,Tcに架け渡された新電線Laに対して大きな張力を作用させたときに、新電線Laの撓みが吸収されてローラ12…上の新電線Laが上方に向けて移動してもその移動が阻害されることがなく、該新電線Laを適正な架設位置(送電するときに適正とされる位置)にまで移動させることができる。   As described above, the wire drawing method according to the present embodiment is the new wire La sent out from the tower Ta side that is erected at one of the two points that define the construction section R that spans the wire L. Is pulled to the side of the tower Tb that is erected at the other of the two points, and the new electric wire La is placed at a position above the separation target object X between the towers Ta and Tc at a necessary distance. In the wire drawing method for bridging the steel towers Ta and Tb at the two points, the upper side of the structures 1 and 1 arranged in the vicinity of the separation target object X is in an open state. Necessary for the separation target object X in order to support the new electric wires La between the towers Ta and Tc at a high position separated from the uppermost part of the separation target object X at a high position by the attached rollers 12. Transfer the new electric wire La with a sufficient separation distance In addition, when a large tension is applied to the new electric wire La spanned over the steel towers Ta, Tb, Tc, the bending of the new electric wire La is absorbed and the new electric wire La on the roller 12. Even if it moves in the direction, the movement is not hindered, and the new electric wire La can be moved to an appropriate erection position (position appropriate for power transmission).

従って、該電線延線工法は、新電線Laと要離隔対象物Xとの離隔距離を確保すべく要離隔対象物X近傍に構築された構造物1,1に新電線Laを支持させても、作業者に大きな負担を負わせることなく鉄塔Ta,Tb,Tc間に新電線Laを緊張状態で架設可能な状態にすることができるという優れた効果を奏し得る。   Therefore, even if this electric wire extension method supports the new electric wire La on the structures 1 and 1 constructed | assembled in the vicinity of the separation object X required in order to ensure the separation distance of the new electric wire La and the separation object X required. And the outstanding effect that the new electric wire La can be constructed in a tension state between the steel towers Ta, Tb, and Tc without placing a heavy burden on the operator can be achieved.

さらに言えば、本実施形態に係る電線延線工法では、仮設鉄塔1,1の最上部(アーム11)に取り付けたローラ12…に新電線Laを支持させるようにしているため、吊金車を採用した従来工法のように鉄塔Ta,Tb,Tcの高さや仮設の構造物1,1の高さを必要以上に高く建設する必要がない。より具体的には、従来の工法では、吊金車を仮設鉄塔のアームに吊り下げるようにしているため、撓んだ新電線Laを吊金車に支持させたときに、仮設鉄塔の最上部よりも下方で新電線Laが支持されることになる。従って、仮設鉄塔を構築するに当たって不必要に高いものになるが、本実施形態においては、仮設鉄塔1,1の最上部に取り付けたローラ12…に新電線Laを支持させるため、仮設鉄塔1,1を必要最小限の高さで構築することができ、作業面やコスト面でも有効である。   Furthermore, in the wire drawing method according to the present embodiment, since the new electric wire La is supported by the rollers 12 attached to the uppermost part (arm 11) of the temporary towers 1 and 1, the suspension wheel is used. There is no need to construct the towers Ta, Tb, Tc and the temporary structures 1 and 1 higher than necessary as in the conventional method employed. More specifically, in the conventional construction method, the suspension car is suspended from the arm of the temporary steel tower. Therefore, when the bent new electric wire La is supported by the suspension car, the uppermost part of the temporary steel tower. The new electric wire La is supported below the lower side. Therefore, in constructing the temporary steel tower, it becomes unnecessarily high. In the present embodiment, the temporary electric tower 1 is used to support the new electric wire La on the rollers 12 attached to the uppermost part of the temporary steel tower 1, 1. 1 can be constructed with the minimum necessary height, which is also effective in terms of work and cost.

また、要離隔対象物Xとの離隔距離を確保すべく、新電線Laを架設するときに該新電線Laに撓みが生じることを考慮して新規に鉄塔を建設する際に必要以上の高さの鉄塔を建設したり、鉄塔を建設した後に要離隔対象物Xが設置されたために新電線Laを架設する際に該要離隔対象物Xと新電線Laとの離隔距離が確保できなくなるとして鉄塔をせり上げたりすることがあるが、本実施形態に係る電線延線工法を採用すれば、恒久的な鉄塔を必要以上の高さで建設したり、鉄塔をせり上げたりする必要もない。従って、鉄塔Ta,Tb,Tcを建設するコストも低減することができる。   In addition, in order to secure a separation distance from the separation target object X, a height higher than necessary when a new steel tower is constructed in consideration of the fact that the new electric wire La is bent when the new electric wire La is installed. When the new wire La is installed because the required separation object X is installed after the construction of the steel tower, it is assumed that the separation distance between the required separation object X and the new electric wire La cannot be secured. However, if the wire drawing method according to the present embodiment is employed, it is not necessary to construct a permanent steel tower at a height higher than necessary or to raise the steel tower. Therefore, the cost for constructing the steel towers Ta, Tb, Tc can also be reduced.

そして、本実施形態においては、新電線Laを支持するローラ12が仮設鉄塔1のアーム11の上面に取り付けられているため、台棒14をアーム11に対して接近して配置することができ、防護ネット17を張設すべく台棒14を設けても仮設鉄塔1の高さを不必要に高くする必要がない。すなわち、従来の工法では、仮設鉄塔のアームに吊り下げた吊金車(アームの下方にある吊金車)に電線を支持させるため、吊金車を介在させるべく台棒をアームから離れた位置に取り付ける必要がある。そのため、従来の工法では、仮設鉄塔の高さを高くする必要があったが、本実施形態に係る工法に用いる仮設鉄塔1では、ローラ12を取り付けるアーム11と台棒14との間に介在する構成がないため、台棒14をアーム11に対して極力接近させて配置することができ、仮設鉄塔1(鉄塔本体10)の高さを低くすることができる。従って、本実施形態に係る工法は、仮設鉄塔1の建設における手間やコストについても低減することができる。   And in this embodiment, since the roller 12 which supports the new electric wire La is attached to the upper surface of the arm 11 of the temporary tower 1, the base bar 14 can be arranged close to the arm 11, Even if the pedestal 14 is provided to stretch the protective net 17, it is not necessary to unnecessarily increase the height of the temporary tower 1. That is, in the conventional construction method, in order to support the electric wire on the suspension wheel suspended from the arm of the temporary steel tower (the suspension wheel below the arm), the position of the base bar away from the arm to interpose the suspension wheel It is necessary to attach to. Therefore, in the conventional construction method, it was necessary to increase the height of the temporary steel tower. However, in the temporary steel tower 1 used in the construction method according to this embodiment, the arm is attached between the arm 11 to which the roller 12 is attached and the base bar 14. Since there is no structure, the bar 14 can be arranged as close as possible to the arm 11, and the height of the temporary tower 1 (the tower main body 10) can be lowered. Therefore, the construction method according to the present embodiment can reduce labor and cost in the construction of the temporary tower 1.

また、本実施形態に係る電線延線工法は、要離隔対象物Xを介在させるように仮設鉄塔1,1を鉄塔Ta,Tb,Tcの並ぶ方向(新電線Laの移送方向)と同方向又は略同方向に間隔をあけて二つ配置し、各仮設鉄塔1,1に取り付けられた前記ローラ12…に前記新電線Laを支持させるようにしているため、新電線Laが移送されるときに、仮設鉄塔1,1(ローラ12…)の配置に対応する二カ所で支持されることになり、要離隔対象物Xと該要離隔対象物Xの上方を通過する新電線Laとの間隔を必要な離隔距離に確実に保つことができる。   Further, in the wire drawing method according to the present embodiment, the temporary towers 1 and 1 are placed in the same direction as the direction in which the steel towers Ta, Tb, and Tc are arranged (the transfer direction of the new electric wire La) so that the separation target object X is interposed. When two new wires La are transferred, two rollers are arranged in substantially the same direction at intervals and the rollers 12 attached to the temporary steel towers 1 and 1 are supported by the new wires La. The space between the required separation object X and the new electric wire La passing above the separation object X is to be supported at two locations corresponding to the arrangement of the temporary steel towers 1, 1 (rollers 12 ...). The required separation distance can be reliably maintained.

また、本実施形態に係る電線延線工法は、要離隔対象物Xの最上部から必要な離隔距離以上離れた上方で且つ新電線Laよりも下方の位置で二つの仮設鉄塔1,1間に跨るように防護ネット17を張設した状態で前記ローラ12…に新電線を支持させるため、何らかの要因で仮設鉄塔1,1間の新電線Laが垂れ下がったとしても、防護ネット17の存在で新電線Laが要離隔対象物Xに対して必要な隔離距離を保った状態にすることができる。   In addition, the wire drawing method according to the present embodiment is between the two temporary steel towers 1 and 1 at a position above the uppermost part of the separation target object X by more than a necessary separation distance and at a position below the new electric wire La. In order to support the new wires on the rollers 12 with the protective net 17 stretched across the bridge, even if the new electric wire La between the temporary towers 1 and 1 hangs down due to some reason, the new wire The electric wire La can be in a state of maintaining a necessary separation distance with respect to the separation target object X.

また、本実施形態に係る電線延線工法は、前記ローラ12…が軸心方向の中央から両端に向けて拡径しているため、移送中の新電線La(及び先行するロープLcや旧電線Lb)がローラ12…の軸心方向の何れか一端側に位置変更しようとしてもローラ12…の軸心方向の中央部に導くことができ、新電線La(及び先行するロープLcや旧電線Lb)をローラ12…で確実に支持することができる。   Moreover, since the said roller 12 ... is diameter-expanding toward the both ends from the center of an axial center direction, the wire drawing method according to this embodiment has the new wire La (and the preceding rope Lc and the old wire being transferred). Lb) can be guided to the central portion of the roller 12 in the axial direction even if one of the axial centers of the rollers 12 changes its position, and the new electric wire La (and the preceding rope Lc and the old electric wire Lb) ) Can be reliably supported by the rollers 12.

さらに、本実施形態に係る電線延線工法は、前記ローラ12…が鉄塔Ta,Tb,Tcの並ぶ方向(新電線Laの移送方向)に間隔をあけて仮設鉄塔1,1に複数取り付けられ、該複数のローラ12…に新電線Laを支持させるようにしているため、新電線Laが複数箇所で支持されることになり、新電線Laが仮設鉄塔1,1上で局所的に屈曲するような態様になることを防止できる。これにより、新電線La(及び先行するロープLcや旧電線Lb)の移送を円滑に行うことができる。   Furthermore, in the wire drawing method according to the present embodiment, a plurality of the rollers 12 are attached to the temporary steel towers 1 and 1 at intervals in the direction in which the steel towers Ta, Tb, and Tc are arranged (transfer direction of the new electric wire La), Since the new electric wires La are supported by the plurality of rollers 12..., The new electric wires La are supported at a plurality of locations, so that the new electric wires La are locally bent on the temporary towers 1 and 1. Can be prevented. Thereby, transfer of new electric wire La (and preceding rope Lc and old electric wire Lb) can be performed smoothly.

なお、本発明は、上記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で、適宜変更を加え得ることは勿論のことである。   In addition, this invention is not limited to the said embodiment, Of course, it can change suitably in the range which does not deviate from the summary of this invention.

上記実施形態では特に言及しなかったが、通常、鉄塔Ta,Tb,Tcに架設される電線が複数本であるため、複数の新電線Laを同時に架け渡すようにしてもよい。すなわち、上記実施形態のように仮設鉄塔1のアーム11の延出する方向で複数のローラ12…を一列に配置したり、アーム11の延出する方向に延びる長尺なローラ12…を配置したりすれば、複数本の新電線Laを支持することができるため、一度に複数本の新電線Laを鉄塔Ta,Tb,Tcに架け渡すようにしてもよい。この場合、各鉄塔Ta,Tb,Tcに対して架け渡す新電線La毎に金車Wを取り付け、各新電線Laを独立した経路で架け渡すようにしてもよいし、複数の新電線Laを束ねて一本にした上で鉄塔Ta,Tb,Tcに架け渡してもよい。   Although not particularly mentioned in the above embodiment, normally, since there are a plurality of electric wires installed on the steel towers Ta, Tb, Tc, a plurality of new electric wires La may be installed at the same time. That is, a plurality of rollers 12 are arranged in a line in the extending direction of the arm 11 of the temporary tower 1 as in the above embodiment, or a long roller 12 extending in the extending direction of the arm 11 is arranged. In other words, since a plurality of new electric wires La can be supported, a plurality of new electric wires La may be bridged over the steel towers Ta, Tb, Tc at a time. In this case, a gold wheel W may be attached to each new electric wire La to be bridged to each of the steel towers Ta, Tb, and Tc, and each new electric wire La may be bridged by an independent route. The bundles may be bundled into one and then bridged over the steel towers Ta, Tb, and Tc.

上記実施形態において、要離隔対象物Xの近傍に構築される構造物として、使用後に解体する仮設鉄塔1,1を採用したが、これに限定されるものではなく、要離隔対象物Xの近傍にあることを前提に、例えば、既設(常設)の鉄塔や、鉄柱などを用いてもよいし、使用されなくなった建物を用いてもよい。この場合においても、ローラ12…は、架設される新電線Laの下方に配置されることを前提に、構造物1,1の上方側が開放状態になった位置に取り付けられることは言うまでもない。また、ローラ12…は、隣り合う鉄塔Ta,Tb,Tcにおける電線Lの支持部分同士を結ぶ直線(仮想線)よりも下方で、且つ要離隔対象物Xの最上部から必要な離隔距離以上離れた上方の位置で新電線Laを支持できる高さに配置されることも言うまでもない。   In the said embodiment, although the temporary steel towers 1 and 1 disassembled after use were employ | adopted as a structure constructed | assembled in the vicinity of the separation target object X, it is not limited to this, The vicinity of the separation target object X is not limited to this. For example, an existing (permanent) steel tower, a steel pillar, or the like may be used, or a building that is no longer used may be used. Also in this case, it is needless to say that the rollers 12 are attached at positions where the upper sides of the structures 1 and 1 are in an open state on the assumption that the rollers 12 are arranged below the laid new electric wire La. Further, the rollers 12 are lower than a straight line (imaginary line) connecting the support portions of the electric wires L in the adjacent towers Ta, Tb, Tc, and are separated from the uppermost part of the separation target object X by a necessary separation distance or more. Needless to say, it is arranged at a height above which the new electric wire La can be supported.

上記実施形態において、新電線Laの架設する方向(鉄塔Ta,Tb,Tcの並ぶ方向)に複数列で配置されたローラ12…が新電線Laの架設される方向と直交する方向にも複数設けられたが、これに限定されるものではなく、例えば、各列に単一のローラ12…を配置してもよい。この場合、新電線Laが横ぶれしたときにローラ12…から脱落するのを防止すべく、ローラ12…を長尺なものにすることが好ましい。   In the above embodiment, a plurality of rollers 12 arranged in a plurality of rows in the direction in which the new electric wire La is installed (direction in which the steel towers Ta, Tb, Tc are arranged) are also provided in a direction orthogonal to the direction in which the new electric wire La is installed. However, the present invention is not limited to this. For example, a single roller 12 may be arranged in each row. In this case, it is preferable that the rollers 12 are long in order to prevent the new electric wires La from falling off the rollers 12 when they are swayed.

上記実施形態において、新電線Laの架設する方向(鉄塔Ta,Tb,Tcの並ぶ方向)にローラ12…を複数列で配置したが、これに限定されるものではなく、例えば、新電線Laの架設方向で単列になるようにローラ12を配置してもよい。すなわち、一本のローラ12…を配置したり、複数のローラ12…を同心で一列に並ぶように配置したりしてもよい。この場合、ローラ12…を取り付ける部分(上記実施形態ではアーム11)における新電線Laが架設される方向での幅をできるだけ狭く設定すれば、移送中の新電線Laがローラ12…に沿って撓んだとしても該新電線Laがローラ12…の取り付けられる部分に干渉することを抑制できる。   In the above embodiment, the rollers 12 are arranged in a plurality of rows in the direction in which the new electric wire La is installed (direction in which the steel towers Ta, Tb, and Tc are arranged). However, the present invention is not limited to this. The rollers 12 may be arranged in a single row in the installation direction. That is, a single roller 12 may be arranged, or a plurality of rollers 12 may be arranged concentrically in a line. In this case, if the width in the direction in which the new electric wire La is installed is set as narrow as possible in the portion where the rollers 12 are attached (arm 11 in the above embodiment), the new electric wire La being transferred is bent along the rollers 12. Even if it is, it can suppress that this new electric wire La interferes with the part to which roller 12 ... is attached.

上記実施形態において、軸心方向の中央から両端に向けて拡径したローラ12…に新電線Laを支持させるようにしたが、ローラ12…は、これに限定されるものではなく、外観略真円柱状のものであってもよい。   In the above-described embodiment, the new electric wires La are supported by the rollers 12 whose diameter is expanded from the center in the axial direction toward both ends. However, the rollers 12 are not limited to this, and the appearance is substantially true. It may be cylindrical.

上記実施形態において、要離隔対象物Xを介在させるように構造物(仮設鉄塔)1,1を鉄塔Ta,Tb,Tcの並ぶ方向(新電線Laの移送方向)に間隔をあけて二つ配置したが、これに限定されるものではなく、例えば、要離隔対象物Xの近傍に一つの構造物1を建設し、該構造物1に取り付けたローラ12…で新電線Laを支持させるようにしてもよい。但し、新電線Laを確実に支持して要離隔対象物Xとの離隔距離を確保するには、上記実施形態と同様に、要離隔対象物Xの両側に構造物1,1を建設し、各構造物1,1に取り付けたローラ12…に新電線Laを支持させるようにすることが好ましい。   In the above embodiment, two structures (temporary steel towers) 1 and 1 are arranged in the direction in which the steel towers Ta, Tb and Tc are arranged (the transfer direction of the new electric wire La) so as to interpose the separation target object X. However, the present invention is not limited to this. For example, one structure 1 is constructed in the vicinity of the separation target object X, and the new electric wire La is supported by the rollers 12 attached to the structure 1. May be. However, in order to reliably support the new electric wire La and ensure the separation distance from the separation target object X, the structures 1 and 1 are constructed on both sides of the separation target object X, as in the above embodiment, It is preferable to support the new electric wires La on the rollers 12 attached to the structures 1 and 1.

上記実施形態において、要離隔対象物Xを介在させるように仮設鉄塔1,1を新電線Laの移送方向と同方向に間隔をあけて二つ配置し、該構造物1,1間に防護ネット17を張設するようにしたが、これに限定されるものではなく、防護ネット17は必要に応じて張設すればよい。但し、より安全性を高めるには、防護ネット17を張設することが好ましいことは言うまでもない。   In the above-described embodiment, two temporary steel towers 1 and 1 are arranged at intervals in the same direction as the transfer direction of the new electric wire La so that the separation target object X is interposed, and a protective net is provided between the structures 1 and 1. However, the present invention is not limited to this, and the protective net 17 may be stretched as necessary. However, it goes without saying that it is preferable to stretch the protective net 17 in order to further increase safety.

上記実施形態において、構造物1,1の最上部(仮設鉄塔1,1のアーム11の上面)にローラ12…を取り付けて該ローラ12…に新電線Laを支持させるようにしたが、これに限定されるものではなく、構造物1,1の途中位置にローラ12…を取り付け、該ローラ12…に新電線Laを支持させるようにしてもよい。但し、この場合においても、新電線Laの上方への移動を許容すべく、上方側が開放状態になった位置にローラ12…を取り付けることは言うまでもない。   In the above embodiment, the rollers 12 are attached to the uppermost parts of the structures 1 and 1 (the upper surface of the arm 11 of the temporary towers 1 and 1) so that the new electric wires La are supported by the rollers 12. It is not limited, The roller 12 ... may be attached in the middle of the structures 1 and 1, and the new electric wire La may be supported on the roller 12 .... However, in this case as well, it goes without saying that the rollers 12 are attached to a position where the upper side is opened so as to allow the new electric wire La to move upward.

上記実施形態において、ローラ12…の上方を開放状態にしたまま、該ローラ12…に支持させた新電線Laを移送するようにしたが、これに限定されるものではなく、例えば、図9(a)に示す如く、前記ローラ12…の上方側に位置するように構造物1,1に取り付けられた規制ローラ18で前記ローラ12…に支持された新電線Laの上方側への移動を規制しつつ該新電線Laを移送し、新電線Laが鉄塔Ta,Tb,Tc間に架け渡された後に、図9(b)に示す如く、規制ローラ18を前記ローラ12…の前記上方側の位置から排してローラ12…上の新電線Laの上方側への移動を許容するようにしてもよい。このようにすれば、移送中の新電線Laがローラ12…から跳ね上がろうとしても規制ローラ18によって跳ね上がりが規制されることになり、新電線Laをローラ12…上で安定して移送することができる。より具体的に説明すると、上記実施形態では言及しなかったが、通常、新電線Laに対するロープLcや旧電線Lbの接続には、筒状のクランププロテクター(図示しない)が用いられるため、新電線Laの移送(引き込み)に伴ってクランププロテクターがローラ12…に乗り移ることになるが、該クランププロテクターは剛性を有するため、ローラ12…の乗り移るときに跳ね上がる傾向にある。   In the above embodiment, the new electric wires La supported by the rollers 12 are transferred while the upper portions of the rollers 12 are open. However, the present invention is not limited to this. For example, FIG. As shown in a), the upward movement of the new electric wires La supported by the rollers 12 is restricted by the restriction rollers 18 attached to the structures 1 and 1 so as to be positioned above the rollers 12. However, after the new electric wire La is transferred and the new electric wire La is bridged between the steel towers Ta, Tb, and Tc, as shown in FIG. 9B, the regulating roller 18 is placed on the upper side of the rollers 12. You may make it accept | permit the movement to the upper side of the new electric wire La on the rollers 12 ... from the position. In this way, even if the new electric wire La being transferred jumps up from the rollers 12..., The jumping up is restricted by the restriction roller 18, and the new electric wires La are stably transferred on the rollers 12. be able to. More specifically, although not mentioned in the above embodiment, since a tubular clamp protector (not shown) is normally used for connecting the rope Lc and the old electric wire Lb to the new electric wire La, the new electric wire The clamp protector is transferred to the rollers 12 along with the transfer (retraction) of La. However, since the clamp protector has rigidity, it tends to jump up when the rollers 12 are transferred.

従って、上述のように規制ローラ18を設けることで移送中の新電線Laの跳ね上がりを防止し、新電線Laのローラ12…からの離脱を確実に防止することができる。また、該新電線Laが鉄塔Ta,Tb,Tc間に架け渡された後に規制ローラ18を前記ローラ12…の前記上方側の位置から排してローラ12…上の新電線Laの上方側への移動を許容するため、新電線Laが鉄塔Ta,Tb,Tcに架け渡された後に該新電線Laに対して大きな張力を作用させたときに、新電線Laの撓みが吸収されて新電線Laが上方に向けて移動してもその移動が阻害されることがない。   Therefore, by providing the regulating roller 18 as described above, it is possible to prevent the new electric wire La being transferred from jumping up, and to reliably prevent the new electric wire La from being detached from the rollers 12. Further, after the new electric wire La is bridged between the steel towers Ta, Tb, and Tc, the regulating roller 18 is discharged from the position on the upper side of the roller 12 to the upper side of the new electric wire La on the roller 12. When the new electric wire La is stretched over the steel towers Ta, Tb, Tc and then a large tension is applied to the new electric wire La, the deflection of the new electric wire La is absorbed and the new electric wire La is allowed to move. Even if La moves upward, the movement is not hindered.

そして、新電線La等のローラ12からの離脱を確実に防止するには、前記ローラ12…の軸線方向に間隔をあけた状態でそれぞれが起立するように構造物に取り付けられた二本のガイドローラ19,19間に新電線Laや該新電線Laに接続した旧電線Lb又はロープLc等の線状材を介装した状態で新電線Laや該新電線Laに接続した旧電線Lb又はロープLc等の線状材を支持させるようにすることが好ましい。このようにすれば、移送中の新電線Laや該新電線Laに接続した線状材がローラ12…の軸心方向の何れか一端側に位置変更したときに、何れか一方のガイドローラ19,19が新電線La等のさらなる移動を規制することになる。従って、新電線Laや該新電線Laに接続した線状材がローラ12…から脱落することを阻止し、新電線Laをローラ12…上に維持させることができる。   In order to reliably prevent the new electric wire La or the like from detaching from the roller 12, the two guides attached to the structure so that each of the rollers 12 stands up with an interval in the axial direction. The new electric wire La or the old electric wire Lb or the rope connected to the new electric wire La in a state in which a linear material such as the new electric wire La or the old electric wire Lb or the rope Lc connected to the new electric wire La is interposed between the rollers 19 and 19. It is preferable to support a linear material such as Lc. In this way, when the position of the new wire La being transferred or the linear material connected to the new wire La changes to one end side in the axial direction of the roller 12..., One of the guide rollers 19 , 19 regulates further movement of the new electric wire La and the like. Accordingly, it is possible to prevent the new electric wire La and the linear material connected to the new electric wire La from falling off the rollers 12... And keep the new electric wires La on the rollers 12.

そして、規制ローラ18やガイドローラ19,19を採用する場合には、ローラ12…、規制ローラ18、及びガイドローラ19,19をユニット化し、該ユニット(ローラユニットRU)を構造物1,1に取り付けることでローラ12…や、規制ローラ18、ガイドローラ19,19を構造物1,1に取り付けた状態にすることが好ましい。ここでローラユニットRUの一例について説明すると、該ローラユニットRUは、図9(a)及び図9(b)に示す如く、ローラ12…、規制ローラ18、及び一対のガイドローラ19,19を備えることを前提に、前記ローラ12…の両端を軸支する一対の第一軸受体20a,20bと、規制ローラ18の両端を軸支する一対の第二軸受体21a,21bと、各ガイドローラ19,19の一端を軸支する一対の第三軸受体22a,22bとを備える。   When the regulating roller 18 and the guide rollers 19 and 19 are adopted, the rollers 12..., The regulating roller 18 and the guide rollers 19 and 19 are unitized, and the unit (roller unit RU) is made into the structures 1 and 1. It is preferable that the roller 12..., The regulating roller 18, and the guide rollers 19 and 19 are attached to the structures 1 and 1 by being attached. Here, an example of the roller unit RU will be described. The roller unit RU includes a roller 12..., A regulating roller 18, and a pair of guide rollers 19 and 19, as shown in FIGS. 9A and 9B. As a premise, a pair of first bearing bodies 20a, 20b that pivotally support both ends of the rollers 12, a pair of second bearing bodies 21a, 21b that pivotally support both ends of the regulating roller 18, and each guide roller 19 , 19 is provided with a pair of third bearing bodies 22a, 22b that pivotally support one end thereof.

一対の第一軸受体20a,20bは、ローラ12…を介設可能な間隔をあけて互いに対向した状態で配置され、構造物1に固定される。なお、ここでは一対の第一軸受体20a,20bを独立した状態で配置しているが、例えば、一対の第一軸受体20a,20b同士を互いに間隔をあけた状態で連結してもよい。   The pair of first bearing bodies 20 a and 20 b are arranged in a state of being opposed to each other with an interval at which the rollers 12 can be interposed, and are fixed to the structure 1. In addition, although a pair of 1st bearing bodies 20a and 20b are arrange | positioned in the independent state here, a pair of 1st bearing bodies 20a and 20b may be connected in the state which mutually spaced apart, for example.

そして、図9(a)及び図9(b)に示すローラユニットRUは、二つのローラ12…を装備しており、これに伴って、一対の第一軸受体20a,20bは、二つのローラ12…を並列状態にして軸支できるようになっている。   The roller unit RU shown in FIGS. 9A and 9B is equipped with two rollers 12..., And accordingly, the pair of first bearing bodies 20 a and 20 b is composed of two rollers. 12 can be supported in a parallel state.

そして、一対の第二軸受体21a,21bのうち、一方の第二軸受体21aは、一方の第一軸受体20a,20bの上部に対し、軸支する規制ローラ18の軸線と直交する方向に延びる軸心周りで回転可能に連結される。すなわち、一方の第二軸受体21aは、一方の第一軸受体20aに対して傾動可能に連結される。これに対し、他方の第二軸受体21bは、上下に二分割可能に構成される。すなわち、他方の第二軸受体21bは、上下一対の分割体210b,211bで構成され、該一対の分割体210b,211bが規制ローラ18の端部にある軸部を挟み込んだ状態で規制ローラ18の一方の端部(軸部)を軸支するようになっている。そして、上下一対の分割体210b,211bのうち、下側にある一方の分割体210bは、他方の第一軸受体20bの上部に固定されている。そして、かかるローラユニットRUは、上述の如く、二本のローラ12…を備えているのに対し、規制ローラ18を一本備えているだけである。これに伴い、該ローラユニットRUは、規制ローラ18が上方から見て二本のローラ12…間に位置するように、第二軸受体21a,21bは第一軸受体20a,20bに連結されている。   Of the pair of second bearing bodies 21a and 21b, one second bearing body 21a is in a direction perpendicular to the axis of the regulating roller 18 that pivots with respect to the upper portion of the one first bearing body 20a and 20b. It is connected so as to be rotatable around an extending axis. That is, one second bearing body 21a is connected to one first bearing body 20a so as to be tiltable. On the other hand, the other second bearing body 21b is configured to be divided into two parts in the vertical direction. That is, the other second bearing body 21b is composed of a pair of upper and lower divided bodies 210b and 211b, and the pair of divided bodies 210b and 211b sandwich the shaft portion at the end of the regulating roller 18 so as to sandwich the regulating roller 18. One end portion (shaft portion) of this is pivotally supported. Of the pair of upper and lower divided bodies 210b and 211b, one lower divided body 210b is fixed to the upper part of the other first bearing body 20b. As described above, the roller unit RU includes only two regulating rollers 18 as opposed to the two rollers 12. Accordingly, in the roller unit RU, the second bearing bodies 21a and 21b are coupled to the first bearing bodies 20a and 20b so that the regulating roller 18 is positioned between the two rollers 12 as viewed from above. Yes.

そして、ここでは他方の分割体211bは、規制ローラ18の軸線と直交する方向の一端が一方の分割体210bの一端に対して規制ローラ18と平行又は略平行な軸周りで回転可能に連結され、規制ローラ18の軸線と直交する方向の他端部に一方の分割体210bの他端部に螺合させるボルト(採番しない)を挿通するための貫通穴が穿設されている。これにより、貫通穴に挿通したボルトを一方の分割体210bに螺合させることで規制ローラ18の一端部(軸部)を挟み込んだ状態にして軸支でき、ボルトの螺合を解いて他方の分割体211bを軸線周りで回転させることで規制ローラ18の軸部の上方が開放した状態になるように構成されている。   In this case, the other divided body 211b is coupled so that one end in a direction orthogonal to the axis of the regulating roller 18 is rotatable about an axis parallel or substantially parallel to the regulating roller 18 with respect to one end of the one divided body 210b. A through hole for inserting a bolt (not numbered) to be screwed into the other end portion of one divided body 210b is formed at the other end portion in the direction orthogonal to the axis of the regulating roller 18. As a result, the bolt inserted into the through hole can be screwed into one of the divided bodies 210b so that the one end portion (shaft portion) of the regulating roller 18 is sandwiched, and the shaft can be supported. By rotating the divided body 211b around the axis, the upper portion of the shaft portion of the regulating roller 18 is opened.

そして、一対の第三軸受体22a,22bは、それぞれ第一軸受体20a,20bに連結され、二本のローラ12…が並ぶ方向に突出し、ガイドローラ19,19の一端を軸支するようになっている。そして、各第三軸受体22a,22bは、ガイドローラ19,19が二本のローラ12…の並ぶ方向から見てローラ12…及び規制ローラ18と重なるように軸支している。すなわち、該ローラユニットRUは、二本のローラ12…の並ぶ方向から見てローラ12…、規制ローラ18、及びガイドローラ19,19が井桁状に配置されている。   The pair of third bearing bodies 22a and 22b are connected to the first bearing bodies 20a and 20b, respectively, protrude in the direction in which the two rollers 12 are aligned, and support one end of the guide rollers 19 and 19. It has become. The third bearing bodies 22a and 22b are pivotally supported so that the guide rollers 19 and 19 overlap the rollers 12 and the regulating roller 18 when viewed from the direction in which the two rollers 12 are arranged. That is, in the roller unit RU, the rollers 12..., The regulating rollers 18, and the guide rollers 19 and 19 are arranged in a cross shape as viewed from the direction in which the two rollers 12.

そして、該ローラユニットRUは、ローラ12…、規制ローラ18、及びガイドローラ19,19のそれぞれが、軸線方向の中央から両端に向けて拡径しており、外観鼓状に形成されている。これにより、二本のローラ12…の並ぶ方向から見てローラ12…、規制ローラ18、及びガイドローラ19,19が包囲した領域が丸みをもった四角形状乃至円形になっている。   In the roller unit RU, each of the rollers 12, the regulating roller 18, and the guide rollers 19, 19 has a diameter increased from the center in the axial direction toward both ends, and is formed in an outer drum shape. As a result, the region surrounded by the rollers 12, the regulating roller 18, and the guide rollers 19, 19 is a rounded quadrangular or circular shape as viewed from the direction in which the two rollers 12 are arranged.

かかるローラユニットRUは、以上の通りであり、上述の如く、ローラ12…及び規制ローラ18の軸心が新電線Laの架設される方向と交差(直交)する方向になるようにして第一軸受体20a,20aが構造物1,1の上方側が開放状態にある位置に固定される。そして、ボルトを外して他方の第二軸受体21bの他方の分割体211bを開放状態にして、規制ローラ18の他端側(一方の第二軸受体21aと第一軸受体20aとの連結支点)を回転中心にして該規制ローラ18を回転させて起立させる(図9(b)参照)。   Such a roller unit RU is as described above. As described above, the first bearing is configured such that the axes of the rollers 12... And the regulating roller 18 intersect (orthogonally) the direction in which the new electric wire La is installed. The bodies 20a, 20a are fixed at positions where the upper side of the structures 1, 1 is in an open state. Then, the bolt is removed to open the other divided body 211b of the other second bearing body 21b, and the other end side of the regulating roller 18 (the connection fulcrum between the one second bearing body 21a and the first bearing body 20a). ) Is rotated and the regulation roller 18 is rotated to stand (see FIG. 9B).

このようにすることで、ローラ12…の上方が完全に開放された状態になり、上方から新電線Laの先端に接続された線状材Lb,Lcをローラ12…上及び一対のガイドローラ19,19間に配置できる。そして、新電線Laの先端に接続された線状材Lb,Lcをローラ12…に支持させた状態で、規制ローラ18を傾倒させ、他方の分割体211bを回転させてボルトで一方の分割体210bに固定することで、新電線Laの先端に接続された線状材Lb,Lcが一対のガイドローラ19,19間に介在しつつローラ12…と規制ローラ18とに挟まれた状態になる。これにより、新電線Laと線状材Lb,Lcとを接続したクランププロテクターがローラ12…に乗り移るときやローラ12…から進行方向に離脱するとき等に線状材Lb,Lcや新電線Laが跳ね上がることを防止することができる(図9(a)参照)。また、このように線状材Lb,Lcや新電線Laを移送する際に横ぶれが生じても、一対のガイドローラ19,19の何れか一方が線状材Lb,Lcや新電線Laの移動を規制することになり、ローラ12…からの脱落が防止される(図9(a)参照)。   In this way, the upper side of the rollers 12 is completely opened, and the linear members Lb and Lc connected to the tip of the new electric wire La from above are moved on the rollers 12 and the pair of guide rollers 19. , 19 can be arranged. Then, in a state where the linear members Lb, Lc connected to the tip of the new electric wire La are supported by the rollers 12..., The regulating roller 18 is tilted, the other divided body 211b is rotated, and one divided body with a bolt. By fixing to 210b, the linear materials Lb and Lc connected to the tip of the new electric wire La are interposed between the pair of guide rollers 19 and 19 and between the rollers 12 and the regulating roller 18. . As a result, when the clamp protector connecting the new electric wire La and the linear materials Lb, Lc is transferred to the rollers 12 or detached from the rollers 12 in the traveling direction, the linear materials Lb, Lc and the new electric wires La are Jumping up can be prevented (see FIG. 9A). Further, even if a lateral shake occurs when the linear members Lb and Lc and the new electric wire La are transferred in this way, any one of the pair of guide rollers 19 and 19 is not connected to the linear members Lb and Lc or the new electric wire La. The movement is restricted, and the drop-off from the rollers 12 is prevented (see FIG. 9A).

そして、新電線Laが鉄塔Ta,Tb,Tcに架け渡された後に、ボルトを外して他方の第二軸受体21bの他方の分割体211bを開放状態にして、規制ローラ18の他端側(一方の第二軸受体21aと第一軸受体20aとの連結支点)を回転中心にして該規制ローラ18を回転させて起立させる。このようにすることで、上述の如く、ローラ12…の上方が完全に開放された状態(新電線Laの上方への移動を許容した状態)になるため、鉄塔Ta,Tb,Tcに架け渡された新電線Laに対して大きな張力F,Fを作用させたときに、撓みが吸収されて新電線Laが上方に向けて移動してもその移動が阻害されることがない(図9(b)参照)。   Then, after the new electric wire La is bridged over the steel towers Ta, Tb, Tc, the bolts are removed to open the other divided body 211b of the other second bearing body 21b, and the other end side ( The restricting roller 18 is rotated upright about the rotation support center of the second bearing body 21a and the first bearing body 20a. By doing so, as described above, since the upper side of the rollers 12 is completely opened (a state in which the upward movement of the new electric wire La is allowed), it is bridged over the steel towers Ta, Tb, Tc. When a large tension F, F is applied to the new electric wire La, the bending is absorbed and the new electric wire La moves upward without being obstructed (FIG. 9 ( b)).

従って、上記ローラ12をユニット化して採用しても、従来のように作業者に大きな負担を負わせることがなく、該新電線Laを適正な架設位置(送電するときに適正とされる位置)にまで移動させることができる。   Therefore, even if the roller 12 is used as a unit, it does not place a heavy burden on the operator as in the prior art, and the new electric wire La is placed at an appropriate installation position (position appropriate for power transmission). Can be moved to.

このようにローラ12…、規制ローラ18、及びガイドローラ19,19をユニット化すれば、移送中に新電線La等がローラ12…から脱落することがないため、ローラ12…を長尺なものにしたり、複数のローラ12…を同列に並べたりして新電線La等の支持可能な範囲を広げる必要もない。なお、一対のガイドローラ19,19を設ける場合、規制ローラ18は必須の構成ではなく、単一のローラ12と一対のガイドローラ19,19とをユニット化するようにしてもよい。   If the rollers 12, the regulating rollers 18, and the guide rollers 19, 19 are unitized in this way, the new electric wires La and the like will not fall off from the rollers 12 during the transfer, so that the rollers 12 are long. There is no need to extend the supportable range of the new electric wire La or the like by arranging the plurality of rollers 12 in the same row. In addition, when providing a pair of guide rollers 19 and 19, the control roller 18 is not an essential structure, and you may make it unitize the single roller 12 and a pair of guide rollers 19 and 19. FIG.

1…仮設鉄塔(構造物)、2…電線送出装置、3…巻取装置、10…鉄塔本体、11…アーム、12…ローラ、13…ベース、14…台棒、15…第一滑車、16…第二滑車、17…防護ネット、18…規制ローラ、19…ガイドローラ、20a,20b…第一軸受体、21a,21b…第二軸受体、22a,22b…第三軸受体、23…ベース、130…ベース本体、131…前片部、132…後片部、140…支持体、170…網材、171…小滑車、172…牽引用ロープ、173…支持ロープ、210b,211b…分割体、D…ドラム場、E…エンジン場、La…新電線、Lb…旧電線、Lc…ロープ、RU…ローラユニット、Ta…第一鉄塔(鉄塔)、Tb…第二鉄塔(鉄塔)、Tc…中間鉄塔(鉄塔)、X…要離隔対象物、W…金車   DESCRIPTION OF SYMBOLS 1 ... Temporary steel tower (structure), 2 ... Electric wire sending device, 3 ... Winding device, 10 ... Steel tower main body, 11 ... Arm, 12 ... Roller, 13 ... Base, 14 ... Base rod, 15 ... First pulley, 16 ... second pulley, 17 ... protection net, 18 ... regulation roller, 19 ... guide roller, 20a, 20b ... first bearing body, 21a, 21b ... second bearing body, 22a, 22b ... third bearing body, 23 ... base , 130 ... Base body, 131 ... Front piece part, 132 ... Rear piece part, 140 ... Support body, 170 ... Net material, 171 ... Small pulley, 172 ... Traction rope, 173 ... Support rope, 210b, 211b ... Divided body , D ... drum field, E ... engine field, La ... new electric wire, Lb ... old electric wire, Lc ... rope, RU ... roller unit, Ta ... first steel tower (steel tower), Tb ... second iron tower (steel tower), Tc ... Intermediate tower (steel tower), X ... Separate object, W Gold car

Claims (7)

電線を架け渡す区間を画する二つの地点のうちの一方の地点に立設された鉄塔側から送り出した新電線を前記二つの地点のうちの他方の地点に立設された鉄塔側に引っ張り、鉄塔間にある要離隔対象物から必要な離隔距離をあけた上方位置で前記新電線を前記二つの地点にある鉄塔に架け渡すための電線延線工法であって、前記要離隔対象物の近傍に配置された構造物における上方側が開放状態になった位置に取り付けたローラに、鉄塔間にある新電線を要離隔対象物の最上部から必要な離隔距離以上離れた高位置で支持させることを特徴とする電線延線工法。   Pull the new wire sent out from the tower side standing at one of the two points that define the section where the wire is bridged to the tower side standing at the other point of the two points, A wire extension method for bridging the new electric wire to the steel towers at the two points at an upper position spaced from the object to be separated between the steel towers, and in the vicinity of the object to be separated To support the new wire between the towers at a high position that is more than the required separation distance from the top of the object to be separated, on the roller attached to the position where the upper side in the structure placed in the open state is open Characteristic wire drawing method. 要離隔対象物を介在させるように前記構造物を鉄塔の並ぶ方向に間隔をあけて二つ配置し、各構造物に取り付けられた前記ローラに前記新電線を支持させるようにしたことを特徴とする請求項1に記載の電線延線工法。   The structure is characterized in that two structures are arranged in the direction in which steel towers are arranged so as to interpose a separation target object and the new electric wires are supported by the rollers attached to each structure. The wire drawing method according to claim 1. 要離隔対象物の最上部から上方側に必要な離隔距離以上離れて新電線よりも下側になる位置で二つの構造物間に跨るように防護ネットを張設した状態で前記ローラに新電線を支持させることを特徴とする請求項2に記載の電線の延線工法。   A new electric wire is attached to the roller in a state where a protective net is stretched so as to straddle between two structures at a position that is lower than the new electric wire by a distance higher than the necessary separation distance from the uppermost part of the object to be separated. The wire drawing method for electric wires according to claim 2, wherein 前記ローラが軸心方向の中央から両端に向けて拡径していることを特徴とする請求項1乃至3の何れか1項に記載の電線延線工法。   The wire drawing method according to any one of claims 1 to 3, wherein the roller has a diameter that increases from the center in the axial direction toward both ends. 前記ローラが鉄塔の並ぶ方向に間隔をあけて前記構造物に複数取り付けられ、該複数のローラに新電線を支持させることを特徴とする請求項1乃至4の何れか1項に記載の電線延線工法。   The wire extension according to any one of claims 1 to 4, wherein a plurality of the rollers are attached to the structure at intervals in the direction in which the steel towers are arranged, and the plurality of rollers support the new wires. Wire construction method. 前記ローラの上方側に位置するように構造物に取り付けられた規制ローラで前記ローラに支持された新電線の上方側への移動を規制しつつ該新電線を移送し、該新電線が鉄塔間に架け渡された後に規制ローラを前記ローラの前記上方側の位置から排してローラ上の新電線の上方側への移動を許容するようにしたこと特徴とする請求項1乃至5の何れか1項に記載の電線延線工法。   The new electric wire is transferred while restricting the upward movement of the new electric wire supported by the roller by a restriction roller attached to the structure so as to be positioned above the roller, and the new electric wire is connected between the steel towers. 6. The control roller according to claim 1, wherein the regulating roller is removed from the upper position of the roller after being stretched over to allow the new electric wire on the roller to move upward. The wire drawing method according to item 1. 前記ローラの軸線方向に間隔をあけた状態でそれぞれが起立するように構造物に取り付けられた二本のガイドローラ間に新電線を介装した状態で該新電線を前記ローラに支持させるようにしたことを特徴とする請求項1乃至6の何れか1項に記載の電線延線工法。   The new electric wire is supported by the roller in a state in which the new electric wire is interposed between the two guide rollers attached to the structure so that each of the rollers stands up with a gap in the axial direction of the roller. The wire drawing method according to any one of claims 1 to 6, wherein the wire drawing method is performed.
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