JPH01308108A - Wire extending method for electric wire and wire extending device - Google Patents

Abstract

PURPOSE:To simplify preliminary work and reduce the mechanical members of wire extending work by moving a carrying device suspended and supported through a main cable, and by extending an electric wire. CONSTITUTION:On iron towers 1, a metallic wheels 2 are supported, and a main cable 3 is bridged over the towers 1. The main cable 3 is connected to an existing old earth wire, is a drawing-extended one, and led on the metallic wheels 2 via a first wire-extending wheel 5 through a first drum 4, and the tip side is taken up by a trolley car 6 with a constant tensile force. On the main cable 3, carrying devices 7 are suspended at fixed intervals, and on the carrying devices 7, suspended metallic wheels 8 for supporting OPGWs(optical fiber composite-aerial-earth wires) 9 as electric wires are suspended and supported. Besides, tip carrying-devices 7a, 7b and the tips of the OPGWs 9 are connected to each other respectively with triangular plates 10. The OPGWs 9 are led by a second wire-extending wheel 12 with a constant low tensile force, through a second drum 11 along with the movement of the main cable 3. In this manner, along with the wire extending of the main cable 3, the electric wires 9 can be extended.

Description

[Detailed Description of the Invention] Purpose of the Invention [Field of Industrial Application] This invention provides a method for extending a power transmission line or an optical fiber composite overhead ground wire (hereinafter referred to as 0PGW), and a method for extending the line. This relates to the wire stretching equipment used for work.

[Prior Art] Conventionally, when extending a power transmission line or 0PGW, a large number of carriers were installed along the old ground line that was previously installed between the steel towers, as described in IC published in Japanese Utility Model Application Publication No. 62-260507. are movably supported, and each carrier is connected by a connecting lobe of a certain length, and each carrier has, for example, an OP G
W is supported at 3°.Then, the connecting rope is pulled out by a self-propelled machine that moves along the old ground line by grasping the tip of the connecting rope, and the carrier is moved along the old ground line based on the pulling out of the connecting rope. Before moving, the 0PGW was pulled out from the drum using the carrier and the wire was extended.

[The invention solves the problem]] However, in the line extension method described above, in order to extend the 0PGW, an old ground line and a carrier that is pulled out by a connecting lobe along the old ground line are required, There was a problem in that the preliminary work for the lines was complicated. Then, change the old ground line to 0
In addition to the case of replacing the 0PGW with a PGW, when newly extending the 0PGW between the steel towers, there was also the problem that it was necessary to extend the line A7 corresponding to the old ground line in advance.

On the other hand, in the wire extension method described in JP-A No. 61-100111, the main rope is movably supported on a passing metal wheel suspended from a steel tower, and a carrier is suspended and supported from the main rope. The carrier supports 0PGW. and,
By moving the main rope using a drive means, the carrier is moved and the OPGW is extended.

However, with this wire extension method, the upper end of the carrier is attached to the main rope, so when the tension of the main rope, which is made up of passing lines, returns to its original level due to the tension acting on the main rope, the carrier is attached to the main rope. Since the OPGW is rotated around , there are problems in that the OPGW may fall off from the carrier, and if the carrier is tilted with respect to the passing metal wheel, it will cause trouble when passing over the passing metal wheel. The purpose of the present invention is to provide a method for easily carrying out the work of extending a power transmission line or 0PGW, etc., and to provide a method for easily attaching a carrier to the main rope in order to realize the above-mentioned method for extending the line, and to provide a method for easily attaching a carrier to the main rope. We are trying to extend the line with a mounting structure that prevents the carrier from rotating relative to the main rope even when it returns over time, and a new metal wheel that allows the carrier to pass smoothly over a wide range of inclination angles. To provide a support structure for a tip of an electric wire that can prevent a carrier from tilting due to the tension of the electric wire.

Structure of the Invention [Means for Solving the Problems] In order to solve the problem mentioned above, the present invention provides an intermediate base I to a collar that supports the carrier so that it cannot move in the longitudinal direction with respect to the main rope, on the same main rope. The main ropes are attached at regular intervals and wound around a drum, and the main ropes are pulled out from the drum by the driving force of an overhead wire car and run through a workbench and along the metal wheels supported by each steel tower. , a method of extending an electric wire, in which a carrier supporting the electric wire is rotatably hung on the main rope between each intermediate station and the collar on a workbench;
The first divided pulley and the second divided pulley form one metal wheel, and the first divided pulley and the second divided pulley form a groove formed on the outer peripheral surface of the metal wheel approximately in the width direction. The main rope is divided at a ratio of 2:1, and both pulleys are independently rotatably supported, and the main rope is hung in the groove. The electric wire is supported by a carrier suspended from the main rope, and the electric wire is suspended and supported from the carrier via a support arm extending from the main rope in the direction of the rotation axis of the metal wheel. A recess is provided that engages the arm.
In the engaging part of the recessed part of the carrier, there is a carrier passing structure of the metal wheel which allows the carrier to pass by rotating a second split pulley, and a structure for attaching the carrier to the main rope. The support arm rotatably supports the gripping arm, and the support arm is provided with a holding means for holding the gripping arm integrally with the support arm. The carrier is attached to the main rope with a circular hole that loosely holds the main rope (), and the circular hole can be opened by rotating the gripping arm. A support structure for the tip of the electric wire was realized in which the lower ends of the carriers were connected to each other and the tip of the electric wire was supported and fixed to the connection.

[Function] In the above-mentioned wire extension method, as the main rope moves, the carrier suspended from the main rope is moved and the wire is extended. It is lined. and,
The main rope moving on the metal wheel is always supported by the first split pulley and does not rotate together with the second split pulley, which makes it difficult for the main rope to get over the second split pulley, and it also hangs down from the main rope. The loaded carrier can easily pass through the metal wheel over a wide range of tilting angles of the metal wheel, and the carrier can be easily hooked onto the main rope, and can be suspended and supported rotatably by loosely grasping the main rope. Ru.

Furthermore, the foremost carrier that supports the tip of the electric wire will not tilt relative to the main rope even due to the rearward tensile force acting on the electric wire as the main rope moves.

[Embodiment] An embodiment embodying the present invention will be described below with reference to the drawings. As shown in FIG. The main rope 3 depicted is suspended. The main rope 3 was drawn and extended from a small diameter rope to a thick wire (70-p) using the well-known construction method, or by connecting the main rope 3 to an existing old land line. It is pulled out from the first drum 4 via the first wire rolling car 5 to the metal wheel 20, and the tip side is wound up on the overhead wire 6, and the winding operation of the overhead wire 6 and the first wire rolling wheel 5 Due to the action of , it always moves toward the overhead wire 6 with a constant tension.

Carriers 7 are suspended from the main rope 3 at regular intervals, and hanging wheels 8 are suspended from each of the carriages 7, and a GW9 as an electric wire is supported by the hanging wheels 8. ing. Also, shown in Figure 15 is JJ: Sea urchin first two carriers 7.
The lower ends of a and 7b are connected by triangular plays 1 to 10, and the tip of 0PGW9 is connected to the triangular plays 1 to 10. This OP GW 9 is the first drum 4.
from the second drum 11 arranged nearby to the second track extension car 1
2, and as the main rope 3 moves, it is pulled out with a constant low tension by the second rolling car 12.

Next, the attachment structure of the carrier 7 to the main rope 3 will be explained.
As shown in FIG. 1, a pair of intermediate stoppers 13a and 13b are fitted and fixed to the main rope 3 at predetermined intervals, and as shown in FIG.
is held by the base end of the support arm 14 of the carrier 7. These intermediate collars 13a and 13b are fixed to the main rope 3 in advance, and are attached to the work platform 15 as shown in FIG. The carrier 7 is sequentially attached between each intermediate stage 1 and the collars 13a and 13b by an operator when the intermediate stage 1 is placed on the floor.

As shown in FIG. 3, in the carrier 7, a hanging member 16 is supported at the tip of a support arm 14 so as to be rotatable in the direction along the main rope 3.
It is bent diagonally downward toward the base end, and a hanging wheel 8 shown in FIG. 4 is suspended from the lowermost end via a hanging wheel 17. As shown in the figure, the ◯ PGW 9 is supported on the hanging wheel 8.

As shown in FIG. 7, the base end of a gripping arm 18 is rotatably supported on a shaft 19 at the base end of a support arm 14 of the carrier 7.
As shown in FIG. 6, the support arm 14 has a storage groove 2 in which the gripping arm 18 can be stored from the base end to the middle part thereof.
0 is formed.

A grip recess 21a for gripping the main rope 3 is provided at the base end of the grip arm 18 and the base end of the support arm 14.

21b are respectively formed to accommodate the gripping arm 18.
When stored in the K20, as shown in FIG.
is starting to form.

A first locking hole 23 is formed at the tip of the grip arm 18, and a second locking hole 24 passing through the storage groove 20 is formed at the intermediate portion of the support arm 14. When the gripping arm 18 is stored in the storage groove 20, the first and second locking holes 23. ? are now communicating.

A support hole 25 is formed in the middle part of the support arm 14 near the second locking hole 24, and a long piece 27 of a locking pin 26 having a substantially figure 8 shape is movably supported in the support hole 25. . A short piece 28 of the locking pin 25 is projected to a position where it can be inserted into the second locking hole 24, and a screw 29 is carved at the tip of the long piece 27.

A spring holder (pull 30) is screwed onto the screw 29, and a coil spring 31 is disposed between the spring holder 30 and the support arm 14. It is projected to a position where it passes through the storage groove 20 in the second locking hole 24.

A regulating pin 32 is projected toward the support arm 14 at the center of the bent portion of the locking pin 26, and a maximum amount of protrusion of the short piece 28 into the second locking hole 24 is set.

Therefore, in the above-mentioned carrier 7, the operator rotates the gripping arm 18 as shown in FIG. The main rope 3 is positioned between 13a and 13b.

Then, the locking pin 26 was moved in the direction of the arrow in FIG. 6 against the biasing force of the coil spring 31, and the short piece 28 was inserted from the storage groove 20 into the second locking hole 24. In this state, the gripping arm 18 is stored in the storage groove 20 and the locking pin 2 is
6, the short piece 28 of the locking pin 26 passes through the first and second locking holes 23 and 24, as shown in FIG.

As a result, the gripping arm 18 is held in the storage groove 20, and the main rope 3 is held in the gripping recesses 21a, 21b as shown in FIG.
It is held loosely within a circular hole 22 formed by. Therefore,
The carrier 7 is rotatably supported by the main rope 3, and is always supported by a hanger with the support arm 1/l held in the horizontal direction due to its own weight.

Next, to explain in detail the metal wheel 2 that guides the main rope 3, the metal wheel 2 is suspended from the steel tower 1 by a metal wheel cord 333 (not shown in FIG. . That is, as shown in FIGS. 2 and 3, the support member 3j4 of the metal wheel 2 is suspended and supported by the metal wheel cord 33, and the metal wheel 2 is rotatable on the spindle 35 supported by the support member 34. Supported. The metal wheel 2 is divided into a first divided pulley 36 and a second divided pulley 37 in the width direction, and both pulleys 36 and 37 are rotatably supported separately. The split pulley 36 occupies approximately 2/3 of the width of the metal wheel 2, and the second split pulley 37 occupies the remaining 1/3.

The main rope 3 moves within a groove 38 formed by both pulleys 36 and 37, and the main rope 3 is formed with a diameter that is approximately supported by the first split pulley 36. j: The shape of the groove 38 is such that the first divided pulley 36 side is formed into a concave curved surface 36a, and the second divided pulley 37 side is formed into a convex curved surface 37a,
Normally, the main rope 3 is supported by the first split pulley 36, and as the main rope 3 moves, only the first split pulley 36 rotates, and the second split pulley 37 is only touched by the main rope 3. It will not rotate. Therefore, it is difficult for the main rope 3 to climb over the second split pulley 37.

An auxiliary pulley 39 is connected to the support shaft 35 in front of the second split pulley 37.
Even if the main rope 3 crosses over the second split pulley 37 and comes off the groove 38, the main rope 3 is received (stopped) by the auxiliary pulley 39, so that the metal wheel 2 It is designed to prevent it from falling off.

The support arm 1 of the carrier 7 is attached to the outer peripheral edge of the second split pulley 37.
Twenty new recesses 40 are formed at regular intervals. Then, when the main rope 3 moves on the metal wheel 2 and the carrier 7 approaches the metal wheel 2, the support arm 14 engages with one of the recesses 40 and rotates the second split pulley 37. As shown in FIG. 2, the carrier 7 passes through the metal wheel 2.

At this time, the second split pulley 37 engages the support arm 1/1 with its recess 40 while rotating slightly back and forth.

A guide 41 is attached to the lower end of the support member 34 to prevent the carrier 7 and the metal wheel 2 from coming into contact with each other.

As shown in FIG. 8, the guide 41 is supported at both ends by support frames 42 extending left and right from the support member 34, and is curved so as to cover the metal wheel 2 at a predetermined interval.

A drop-off prevention member 43 that prevents the main rope 3 from falling off the metal wheel 2 is rotatably supported at the upper end front portion of the support member 34 . That is, as shown in FIG. 9, the fall prevention member 43 has its upper end rotatably supported by the support member 34, and its lower end extends to the vicinity of the second split pulley 37. A torsion coil spring 44 is built into the support portion of the fall prevention member 43 of the support member 34, and the torsion coil spring 44
The proximal end = 148 is supported by the support member 34, and the distal end 44b
is engaged with the falling-off prevention member 43. The fall prevention member 44 is always attached to the support 1111 as shown by the solid line in FIG.
35 to prevent the main rope 3 from falling off the metal wheel 2, and the support arm 1 of the carrier 7 due to the inclination of the metal wheel 2.
4 comes into contact with this drop-off prevention member 43, the drop-off prevention member/13 rotates as shown by the chain line in the same figure, so as not to impede the passage of the carrier 7.

Next, the function of the metal wheel configured as described above and the wire extension method using the metal wheel will be explained, for example, in the case of extending 0 PGW.

Now, prior to the extension of the 0PGW, the main rope 3 is extended to the metal wheel 2 suspended and supported by each steel tower 1 by a known wire extension method. The main rope 3 is wound on the first drum 4 in advance with pairs of intermediate straps 1 to collars 13a and 13b fixed at regular intervals and then extended. And workbench 15
At the top, a carrier 7 is attached between each intermediate l-flange 13a, 13b. Installation of this carrier 7 (P is installed on the carrier 7)
When the pulled locking pin 26 is pulled out against the biasing force of the coil spring 31, the gripping arm 18 rotates downward about the shaft 19 as shown in FIG. Then, in this state, the main rope 3 is applied to the grip recess 21b, and the grip arm 18
If you return it to the storage groove 20 and let go of the locking pin 26,
A circular hole 2 in which the gripping arm 18 is held in the storage groove 20 and the main rope 3 is formed by the gripping recesses 21a and 21b.
2, and the carrier 7 is rotatably supported around the main rope 3 as a fulcrum. Therefore, with this mounting structure, even if the main rope 3 goes back up, the carrier 7 can rotate around the main rope 3 as a fulcrum.
] will not be done. In this way, the carriers 7 are sequentially attached to the main rope 3 (the 0PGW 9 is supported on the hanging wheel 8 suspended from the carrier 7, and the first carriers 7a, 7
Triangle play connecting b 1~1- 0 points for O
When the GW 9 is tied and the main rope 3 is pulled by the overhead wire 6, the main rope 3 moves along the metal wheel 2 supported by each tower 1, and is suspended via each carrier 7 that moves along with this. The OIGW9 supported by the metal wheel 8 is transferred. This moment,
Since the first carriers 7a and 7b are held in a V-shape,
Even if a rearward tensile force is applied to the carriers 7a, 7b as the 0PGW 9 is pulled out, the carriers 7a, 7b will not tilt relative to the main rope 3, and therefore the rear carrier 7 will not be tilted either. In other words, it is possible to eliminate problems caused by the tilting of the carrier 7 when passing the metal wheel, and when the weight is suspended and supported to hold the first carrier in the vertical direction, the weight is suspended and supported. The friction between the carrier and the guide 41 becomes so great that the metal wheel 2 rotates around the metal wheel cord 33.
For this reason, the main rope 3 may fall off, but the carrier 7
a.

With the structure 7b, it is possible to prevent the carrier from tilting without suspending and supporting the weight, so the above-mentioned problems can be prevented.

In this way, when the main rope 3 moves on each metal wheel 2, the main rope 3 moves on the first split pulley 36a''.
The split pulley 36 (P is rotated, and the second split pulley 37
is in a stopped state. The main rope 3 is stably held within the groove 38 of the metal wheel 2 by the convex curved surface 37a of the second split pulley 37, and the tension acting on the main rope 3 causes the main rope 3 to move to the second split pulley 37. Even if you try to climb over it, the falling prevention member 4
3 prevents the main rope 3 from falling off the metal wheel 2.

On the other hand, when the carrier 7 reaches the metal wheel 2 position as the main rope 3 moves, the support arm 14 of the carrier 7 engages with one of the recesses 40 formed on the outer periphery of the second split pulley 37. , passes over the metal wheel 2 while rotating the second split pulley 37. At this time, the hanging member 16 of the carrier 7 is attached to the guide 41.
: Move in a position where it does not come into contact with the metal car 2. After extending the 0PGW9 to the overhead line car 6 position in this way, the 0PGW9 is fixed to the steel tower 1 using the known II method, and the main rope 3, Wl gear 7, and metal wheel 2 are recovered, and the 0PGW9 is extended. The work is finished.

As described above, in this wire extension method, the carrier 7 can be moved along with the movement of the main rope 3 to extend the 0PGW9, so there is no need for a connecting rope etc. to move the carrier 7, and the main rope Even if the main rope 3 returns to its original position due to the tension acting on the rope 3, the carrier 7 holds the main rope 3 loosely, so the carrier 7 is suspended without being rotated using the main rope 3 as a fulcrum. be done.

Therefore, the preliminary work prior to the extension of the 0PGW9 can be simplified.

Although not shown in Figures 2 and 3, the metal wheel 2 is shown suspended vertically from the basin 1 with vertical tension applied by the main rope 3. Since the wheel 2 is suspended and supported from the steel tower 1 by the hanging wheel cord 17, the wheel 2 may tilt in any direction depending on the direction of the tension horn acting on the main rope 3.

For example, as shown in FIG. 10, even if the main rope 3 is pulled downward while curved to the right with respect to the steel tower 1, and the metal wheel 2 is tilted by /1515 degrees due to its tension horn, the carrier 7 will still be guided by the guide 41. It is possible to pass through the metal wheel 2 without touching the metal wheel 2. By extending both ends of the guide/11 to the rear of the metal wheel 2, it is possible to create a structure that allows the carrier 7 to pass even if the guide/11 is tilted even more severely.

In addition, as shown in FIG. 11, when the main rope 3 is pulled downward while curved to the left with respect to the steel tower 1, and the metal wheel 2 is tilted due to the tension, the carrier 7 can pass through Gold Car 2 without any problems.

At this time, the support arm 14 of the carrier 7 comes into contact with the +152 fall prevention part 43, but it can pass through without any problem due to the rotation of the fall prevention part side 1/1.

Further, as shown in FIGS. 12 and 13, this metal wheel 2 can also be used when upward tension is applied to the main rope 3. In other words, from the state shown in Fig. 12, which is tilted by 5 degrees from the vertical line, as shown in Fig. 13, it is 45 degrees
The carrier 7 can pass through the metal wheel 2 without any trouble within the range of the tilted state.

Therefore, this metal wheel 2 can reliably and smoothly pass the carrier 7 within the range of the carrier passable areas Wl and W2 (not shown in FIG. 14), and even in areas other than these Wl and W2. The main rope 3 is pulled downward using an upside-down metal wheel to adjust the tilting direction of the metal wheel 2 so that it fits within this area. You can pass through it.

Effects of the Invention As detailed above, in the wire extension method of the present invention, it is possible to extend the electric wire along with the extension of the main rope, so that the half-assembly work prior to the extension of the electric wire can be simplified. At the same time, the equipment required for the line extension work can be reduced.

In addition, the wire stretching equipment used to realize this method is designed to prevent the main rope from falling off over a wide range of tilting angles of the metal wheel, and to allow the metal wheel to pass through the carrier smoothly and to easily attach the main rope to the main rope. A carrier that can be removed and prevented from rotating due to the return of kasuri that occurs on the main rope, and a weight that suspends and supports the tilting of the first carrier that supports the tip of the electric wire. Provide a support structure to prevent it from being covered or covered.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing the wire extension work based on this invention, Figure 2 is a front view of the metal wheel used in the wire extension work, Figure 3 is a side view of the same, and Figure 4 is the main rope from the steel tower. FIG. 5 is a front view showing the support arm of the carrier, FIG. 6 is a plan view, and FIG. 7 is a front view showing the holding arm in a rotated state. 8 is a plan view without showing the metal wheel and its guide, FIG. 9 is a partially cutaway side view of the falling-off prevention member, and FIGS. 10 to 13 are schematic views of the metal wheel in various usage states. , FIG. 14 is an explanatory view showing the usable range of this metal wheel, and FIG. 15 is a front view showing the support structure for the tip of the electric wire. Steel tower 1, metal wheel 2, main cable 3, first drum 4, overhead line car 6,
Carriers 7, 7a, 7b, 0PGW (electric wire) 9, intermediate stoppers 3a, 13b, support arm 14, workbench 15, gripping arm 18, circular hole 22, locking pin 26, first split pulley 36, second Split pulley 37, groove 38, recess 400

Claims (1)

[Claims] 1. Intermediate stoppers (13a, 13b) that support the carrier (7) immovably in the longitudinal direction with respect to the main rope (3) are connected to the main rope (3).
3) at regular intervals, and the main rope (3) is attached to the drum (
4), and the main rope (3) is pulled out from the drum (4) by the driving force of the overhead line car (6), passes through the work platform (15), and is attached to the metal wheel (2) supported by each steel tower (1). ), and on the workbench (15), a carrier (7) supporting the electric wire (9) was rotatably hooked to the main rope (3) between each intermediate stopper (13a, 13b). A method of extending electric wire characterized by the following. 2. First split pulley (36) and second split pulley (37)
The first split pulley (36) and the second split pulley (37) form a groove (38) formed on the outer peripheral surface of the metal wheel (2). It is divided in the width direction at a ratio of approximately 2:1, both pulleys (36, 37) are independently rotatably supported, and the main rope (3) is hung in the groove (38), and its diameter is approximately The diameter is set to be supported by the first split pulley (36), and the electric wire (9) is supported by a carrier (7) hanging from the main rope (3). An electric wire (9) is suspended and supported via a support arm (14) extending in the direction of the rotation axis of the wheel (2), and the second split pulley (37
) is provided with a recess (40) that engages with the support arm (14) of the carrier, and when the carrier (7) and the recess (40) are engaged, the second split pulley (37) is rotated. Carrier (7
). 3. A gripping arm (18) is rotatably supported on a support arm (14) for attaching the carrier (7) to the main rope (3), and the gripping arm (18) is rotatably supported on the support arm (14).
) is integrally held with the support arm (14) by a locking pin (
26), and the gripping arm (18) is connected to the support arm (14).
) is provided with a circular hole (22) for loosely holding the main rope (3) between the two, and the circular hole (22) can be opened by rotating the gripping arm (18). The mounting structure of the carrier to the main rope. 4. Two carriers (7a, 7b) hanging from the main rope (3)
) are connected to each other, and the tip of the electric wire (9) is supported and fixed to the connecting portion.