JPH07322436A - Electric wire suspending tool - Google Patents

Abstract

PURPOSE:To easily and safely perform electric wire shifting work from a wire drawing metal wheel to a suspension clamp in wire tensioning work by fixing an electric wire suspending tool by using a yoke and by raising a wire holding portion retaining an electric wire by driving an expansion drive equipment or a supporting arm open/close driving equipment. CONSTITUTION:A tool fixing portion 31 is fixed to a yoke 24 with bolts, a wire holding portion 34 at a lower end of the tool fixing portion is positioned immediately below an electric wire 6 with the expansion drive equipment 33 in an extended position, and if the expansion drive equipment 33 is contracted, then the wire holding portion 34 holds the wire 6 and raises it. By doing this, the wire 6 is dislocated from a metal wheel 25. Next, the metal wheel 25 is removed from the yoke 24, the wire 6 is housed in and held by the suspension clamp, and the suspension clamp is attached to the yoke 24 and the transfer of the wire 6 is completed. As a result, shifting work for the wire from wire drawing metal wheel to the suspension clamp in the tensioning work can be performed easily and safely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire hoisting tool mainly used for tightening work in a suspension supporting tower provided with an insulating arm.

[0002]

2. Description of the Related Art A conventional suspension system for a suspension tower in a general overhead transmission line is shown in FIG. That is, as shown in the figure, the suspension device 1 includes a steel arm 2 of a suspension tower.
(The figure shows one of the members) 3, a yoke 3 having a predetermined electric performance, a line side yoke 5, a suspension clamp 7 for supporting an electric wire 6, and the like. In the suspension device 1 of the illustrated example, arc horns 8 and 9 and shield rings 10 and 11 are attached to the yokes 3 and 5, respectively.

Description will be given of the contents of work generally performed when the electric wire 6 is erected by the suspension device 1 described above. First, as shown in FIG. 9, the extension of the electric wire 6 has the same length as that of the suspension device 1. The gold wheel 16 is suspended from the steel arm 2 by the gold wire cord 15. The wire 6 is extended by passing the electric wire 6 through the groove of the gold wheel 16. In this case, gold wheel 16
Are arranged so that the metal groove is at the same height as the position of the electric wire 6 of the suspension clamp 7. After drawing the wire, adjust the sag until the sag is reached. Next, while suspending the suspension device 1 from the steel arm 2 near the gold wire cord 15, for example, from the steel arm 2 as well, for example, a lever block (a structure similar to a chain block that is hoisted and hoisted by lever operation) 18 After lowering the electric wire lifting hook 17 as shown in FIGS. 10 (a) and 10 (b) using the above, and taking in the electric wire 6 on the gold wheel 16 to the electric wire lifting hook 17,
The electric wire 6 taken in is accommodated (transferred) in the suspension clamp 7 and grasped. In this way, the tight line ends.

[0004]

By the way, in recent years, there is an increasing demand for a compact power transmission line in which the entire overhead power transmission line is made as small as possible, and a steel tower using an insulating arm is being studied as a means for realizing the demand. This insulating arm will be described with reference to FIG. 6, which is an embodiment of the present invention. The insulating arms are made of FRP or the like and have a shaft 21a, 22a made of silicon rubber or the like having the same umbrella shape as a conventional porcelain insulator on the outer circumference of the shaft 21a, 22a. This is a structure using the members 21 and 22 provided with the polymer insulators 21b and 22b, and has both a function as an arm and a function as an insulating support member (the same function as a conventional porcelain insulator). In addition, the insulating arm 23 shown in FIG.
It is an insulating arm having a two-piece structure in which a diagonal member 22 and a diagonal member 22 are combined. In this case, the suspension clamp 26 is directly attached to the yoke 24 connected to the tip of the insulating arm 23. Further, the wire wheel 25 for wire drawing is also directly attached to the yoke 24 at the time of wire drawing.

In the suspension tower having the above-described insulating arm 23, the wire clamp 25 for suspending the wire is suspended from the wire clamp 25 for wire extension at the time of a tight line.
When the electric wire 6 is transferred to the electric wire 6, it is necessary to lift the electric wire 6 just under the yoke 24 by about 10 cm from the groove groove of the gold wheel 25. This work is performed by the conventional method using the lever block 18 or the like. Difficult to do.
That is, in the conventional suspension device 1, there is a sufficient height distance from the steel arm 2 to the suspension clamp 7, and therefore, there is also a sufficient height distance between the steel arm 2 and the gold wheel 16. , The lever block 18 etc. can be used,
Although the work of transferring the electric wire 6 as described above is easy, in the case of a suspension tower having the insulating arm 23, the height distance between the insulating arm 23 and the gold wheel is extremely short. Cannot be adopted.

The present invention has been made in view of the above circumstances, and when the suspension support provided with an insulating arm is used, for example, in the case of tight wire work, the work of transferring the electric wire from the drawing wire car to the suspension clamp is performed. It is an object of the present invention to provide an electric wire lifting tool capable of easily and safely performing the above.

[0007]

The invention of claim 1 for solving the above-mentioned problems is an electric wire lifting tool for use in a suspension support equipped with an insulating arm having a yoke for connecting a suspension clamp attached to its tip, A tool fixing portion fixed to the yoke, a support arm extending from the tool fixing portion to one side in the electric wire longitudinal direction, an extendable telescopic drive device having an upper end supported by the support arm, and a lower end of the telescopic drive device. And an electric wire gripping part attached to the electric wire.

According to a second aspect of the present invention, there is provided an electric wire lifting tool for use in a suspension support equipped with an insulating arm having a yoke for connecting a suspension clamp attached to a tip thereof, and a tool fixing portion fixed to the yoke, A pair of support arms having a V-shape and having a C-shape, the base end of which is rotatably connected to the tool-fixing part and extends downwardly on both the left and right sides of the wire in the longitudinal direction of the wire, respectively. It is characterized in that it is provided with a support arm opening / closing drive device that opens and closes so that the angle formed changes, and an electric wire gripping part attached to the tip of the support arm.

According to a third aspect of the present invention, in the electric wire lifting tool for overhead wire work according to the first or second aspect, a wire car for wire extension is used as an electric wire gripping portion.

[0010]

When the wire lifting tool according to claim 1 is used for the tight-tie work after wire drawing, the wire gripping portion at the lower end of the wire lifting tool is extended into the groove of the wire car of the wire drawing machine while the telescopic drive device is extended. When the electric wire gripper holds the electric wire and rises when it is positioned immediately below the passed electric wire, and then the expansion / contraction drive device is contracted, the electric wire is disengaged from the wagon. Next, the gold wheel is removed from the yoke, the wire is received and held in the suspension clamp, and then the suspension clamp is attached to the yoke. As a result, the electric wire is transferred from the gold wheel to the suspension clamp.

When the electric wire hoisting tool of claim 2 is also used for the tight-tie work after the wire drawing, the angle of both of the support arms forming the V-shape is narrowed and the lower end of the electric wire gripping portion is lowered. Position the wire just under the wire passing through the groove of the drawing wheel and then widen the angles of both support arms by the support arm opening / closing drive. The wire gripping part at the lower end of the support arm holds the wire. Rises and the electric wire comes off the gold wagon. Next, after removing the gold wheel from the yoke and accommodating and holding the wire in the suspension clamp,
Attach the suspension clamp to the yoke. As a result, the electric wire is transferred from the gold wheel to the suspension clamp. In this case, since the electric wire is held by the electric wire gripping portions on both sides of the gold wheel, the electric wire can be transferred while being held horizontally. Therefore, it is appropriate when a vibration resistant suspension clamp or the like is used as the suspension clamp.

[0012]

Embodiments of the present invention will be described below with reference to FIGS. This embodiment is an electric wire hoisting tool used in a suspension support (the illustrated example is a pole made of steel pipe or the like, not a steel tower) 28 having an insulating arm 23 as shown in FIG. This insulating arm 23 has the F
It is a structure using members 21 and 22 provided with polymer insulators 21b and 22b made of silicon rubber or the like having an umbrella shape similar to that of a conventional porcelain insulator on outer circumferences of shafts 21a and 22a made of RP or the like, and used as arms. And the function as an insulating support member (the same function as the conventional porcelain insulator). The horizontal member 21 and the diagonal member 22 are connected to the suspension support 28 at the base end sides via the connecting members 21c and 22c, and are connected to the yoke 24 at the tip end side via the connecting members 21 and 322d. The insulating arm 2 shown
Reference numeral 3 is an insulating arm having a two-piece structure in which a horizontal member 21 and a diagonal member 22 are combined. FIG. 6 shows a state in which the overhead transmission line has been extended in the work of constructing the overhead transmission line, and the electric wire 6 is passed through the gold wheel groove of the gold wheel 25 for wire extension attached to the yoke 24.

FIG. 1 is a front view of an electric wire lifting tool 30 according to an embodiment of the present invention. The wire lifting tool 30 includes a tool fixing portion 31 fixed to the yoke 24 with a bolt, a support arm 32 fixed to the tool fixing portion 31 with a bolt and extending to one side in the wire longitudinal direction, and a support arm 32.
The telescopic drive device 33 has an upper end supported by the telescopic drive device 33, and an electric wire grip portion 34 attached to the lower end of the telescopic drive device 33. The extension / contraction drive device 33 includes upper and lower rods 33a and an intermediate drive unit 33b. The drive unit 33b extends or retracts one rod 33a or both rods 33a to extend or retract the whole. As the extension / contraction drive device 33, for example, a turnbuckle mechanism or a hydraulic device can be adopted. If it is a turnbuckle mechanism, the operator manually turns it to expand and contract. The illustrated electric wire gripping portion 34 has a hook structure (a structure as shown in FIG. 10B).
However, it is also possible to use the same wire car for drawing wire as the electric wire gripping portion 34 'shown in FIG.

Tightening work performed using the above wire lifting tool 30 will be described. After the wire drawing work is completed by using the drawing wire wheel 25 as shown in FIG. 6, the slackness is adjusted until the specified sag is reached. After that, the electric wire 6 on the gold wheel 25 is transferred to the suspension clamp as follows. First, the tool fixing portion 31 of the wire lifting tool 30 is fixed to the yoke 24 with bolts. Next, when the telescopic drive device 33 is extended, the electric wire gripping portion 34 at the lower end thereof is positioned immediately below the electric wire 6, and then the telescopic drive device 33 is contracted. Hold 6 and go up. The rising distance may be about 10 cm. As a result, the electric wire 6 comes off the gold wheel. Then, the gold wheel 25 is removed from the yoke 24, the electric wire 6 is accommodated and held in the suspension clamp 26, and then the suspension clamp 26 is attached to the yoke 24 as shown in FIG.
As a result, the electric wire 6 is transferred from the gold wheel 25 to the suspension clamp 26, and the tightening is completed.

FIG. 3 shows an embodiment of the electric wire lifting tool of claim 2. This electric wire lifting tool 40 includes a yoke 24
And a base end portion rotatably connected to the tool fixing portion 41, and the base end portion of the tool fixing portion 41 is rotatably connected to the tool fixing portion 41 and extends downward on both the left and right sides in the longitudinal direction of the wire (left and right direction in FIG. 3) to form a V shape. A pair of support arms 42, a support arm opening / closing drive device 43 for opening and closing the left and right support arms 42 in the shape of a V so that the angle formed between them can be changed, and an electric wire attached to the tip of the support arm 42. And a grip portion 44. The support arm opening / closing drive device 43 includes left and right rods 43a and an intermediate drive portion 43b, and one or both rods 43a are retracted by the drive portion 43b.
Stretch the whole. The tips of the left and right rods 43a are connected to a position slightly above the center of the support arm 42 via a transmission arm 45. The support arm opening / closing drive device 43 can employ, for example, a turnbuckle mechanism or a hydraulic device. Further, the support arm opening / closing drive is not limited to the mechanism for changing the angles of the both support arms 42 by linear expansion and contraction as shown in the figure, but the angles of the support arm opening / closing device itself may be changed so that the both support arms 4 may be changed.
The angle of 2 may be changed. Further, the wire gripping portion 44 shown in the drawing uses a drawing wheel.

Tightening work performed using the above wire lifting tool 40 will be described. First, the tool fixing portion 41 of the wire lifting tool 40 is fixed to the yoke 24 with bolts. The support arm opening / closing drive device 43 is extended to form a V-shaped support arm 42.
When the angle of is narrowed and the lower end is lowered, the electric wire gripping portion 44 at the lower end is positioned directly below the electric wire 6, and then the angle of both supporting arms 42 is expanded by the supporting arm opening / closing drive device 43. The wire grip portion 44 at the lower end holds the wire 6 and moves up. As a result, the electric wire 6 is disengaged from the gold wheel 25. Next, the gold wheel 25 is removed from the yoke 24, and the suspension clamp 2
After accommodating and holding the electric wire 6 in 6, the suspension clamp 26 is attached to the yoke 24 as shown in FIG. Thereby, the electric wire is transferred from the gold wheel 25 to the suspension clamp 26.

In this embodiment, since the electric wire 6 is held by the electric wire gripping portions 44 on both sides of the gold wheel 26, the electric wire 6 can be transferred while being held horizontally. Therefore,
As shown in FIG. 5, it is suitable when a vibration resistant suspension clamp (AGS clamp) 46 is used as the suspension clamp. In the compact transmission line, since it is required to reduce the distance between the vertical lines as much as possible, the seismic suspension clamp 46 having a short metal fitting height dimension may be used. The vibration-proof suspension clamp 46 clamps the central part of the armor rod 47 wound around the outer circumference of the electric wire 6, but the central part of the armor rod 47 swells through an insert 48 such as chloroprene rubber to directly contact the electric wire 6. Instead, the electric wire 6 is elastically gripped. When using the vibration-resistant suspension clamp 46,
It is necessary to avoid the length of the armor rod 47 and to hold the electric wire 6 horizontally.
Can meet this demand. Moreover, when the length of the armor rod 47 is different, it can be easily dealt with by changing the length of the support arm 42.

In the above description, the wire wheel 25 is removed from the yoke 24 while the wire 6 is lifted by the wire lifting tool, and then the suspension clamp 26 holding the wire 6 is attached to the yoke 24. It is also possible to provide a dedicated gold wheel attachment portion on the yoke 24 and perform the wire transfer operation with the gold wheel 25 attached to the yoke 24.

Further, the wire lifting tool of the present invention is suitable for use in the wire tightening work as described above, but is not limited to this, and may be used for maintenance work such as replacement of the suspension clamp.

[0020]

According to the electric wire hoisting tool of the present invention, the electric wire hoisting tool is fixed by using the yoke, and the electric wire gripper is moved up and down by driving the telescopic drive device or the support arm opening / closing drive device to elevate the electric wire. Therefore, it is possible to easily and safely perform, for example, the work of transferring the electric wire from the wire drawing wire car to the suspension clamp in the tight wire work.

According to the second aspect, since the electric wire can be held horizontally on both sides of the gold wheel, it is possible to easily cope with the case where a vibration-resistant suspension clamp is used as the suspension clamp.

According to the third aspect of the present invention, since the gold wheel is used as the electric wire gripping portion, when the electric wire gripping portion grips the electric wire and moves up and down, the electric wire is not restrained in the longitudinal direction, and is unnecessary for the electric wire. Tension does not work.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an electric wire lifting tool according to the invention of claim 1;

FIG. 2 is a diagram showing another embodiment of the electric wire gripper in FIG.

FIG. 3 is a front view showing an embodiment of an electric wire lifting tool according to the invention of claim 2.

FIG. 4 is a diagram showing one mode of operation of the electric wire lifting tool of FIG.

5 is a diagram showing a usage state of the electric wire lifting tool of FIG. 3 when a vibration resistant suspension clamp is adopted as the suspension clamp.

FIG. 6 is a side view showing a state in which a suspended support provided with an insulating arm has been extended, and is a diagram at a stage before starting a wire binding operation using the wire lifting tool of the present invention.

FIG. 7 is a side view of a main part of the suspension device showing a state after performing a tension line.

FIG. 8 is a front view of a conventional suspension device.

FIG. 9 is a diagram illustrating a procedure for taking in an electric wire from a drawing wheel for drawing wire to a suspension clamp by a conventional method when a wire is tightened.

10 shows the electric wire lifting hook in FIG. 9, where FIG. 10 (a) is a front view and FIG. 10 (b) is a side view.

[Explanation of symbols]

 6 Electric Wire 23 Insulating Arm 24 Yoke 25 Gold Wheel for Extension Wire 26 Suspension Clamp 30,40 Electric Wire Lifting Tool 31,41 Tool Fixing Part 32,42 Support Arm 33 Telescopic Drive Device 34,44 Electric Wire Grip Part 43 Support Arm Opening / Closing Drive Device

Claims (3)

[Claims] 1. A wire lifting tool for use in a suspension support (28) comprising an insulating arm (23) having a yoke (24) for connecting a suspension clamp attached to the tip thereof.
Tool fixing part (31) fixed to the yoke (24)
A support arm (32) extending from the tool fixing part (31) to one side in the longitudinal direction of the electric wire; an extendable telescopic drive device (33) having an upper end supported by the support arm (32); An electric wire lifting tool, comprising: an electric wire gripping part (34) attached to a lower end of the device (33). 2. A wire lifting tool for use in a suspension support (28) comprising an insulating arm (23) having a yoke (24) for connecting a suspension clamp attached to the tip thereof.
Tool fixing part (41) fixed to the yoke (24)
And a pair of support arms (42) which are rotatably connected to the tool fixing part (41) and extend downwardly on both the left and right sides of the electric wire in the longitudinal direction of the wire to form a h-shape. A support arm opening / closing drive device (43) for opening / closing the left and right support arms (42) so that the angle formed by the two is changed;
An electric wire lifting tool, comprising: an electric wire gripping portion (44) attached to a tip of the support arm (42). 3. The wire lifting tool for overhead line work according to claim 1, wherein a wire wheel is used as the wire gripping portion (44).