JPH0365009A - Anchoring method of passing overhead wire - Google Patents

Abstract

PURPOSE:To simplify anchoring system by fixing D-type arms having anchoring unit to the opposite sides of a dismountable D-type arm existing on a pole then anchoring an existing overhead wire and cutting the overhead wire, thereafter removing the existing arm. CONSTITUTION:An anchor unit 8, assembled on the ground, is suspended above a dismountable D-type arm 7 existing on a pole by means of a hoist mounted on a high position working vehicle (not shown). Then a pair of arm metals 8a in the anchor unit 8 are lowered along the opposite sides of the D-type arm 7, and a bolt 9 is inserted into the bolt holes 8e, 7d of the anchor unit 8 and the D-type arm 7 in order to secure the anchor unit 8 to upper and lower horizontal arms 7a. Thereafter, each phase wire W is clamped with the anchor clamp 8d in the anchor unit 8 and the wire W is cut off at the opposite sides of an existing pass insulator 10. Then a vertical arm 7c is removed from the upper and lower horizontal arms 7a with the insulator 10 being fixed to the vertical arm 7c.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is directed to a system for efficiently carrying out pole installation work, etc., in which overhead wires using a pull-in pole mounting method are changed to overhead wires using a tie-down pole mounting method. This relates to a method for retaining overhead wires.

[Prior art]

The method of retaining overhead wires, which changes the overhead wires installed using the conventional pole installation method (installing poles using disassembly-type arms) into the overhead wires using the retaining pole installation method, is the first method. Figure 3 (a)
As shown in ~(e), a worker riding a packet 22 attached to the tip of the boom 21 of an aerial work vehicle removes one imaginary 'hlW from a lead-in insulator 24 and attaches it to another lead-in insulator 24. The lead-in insulator 24 on the side from which the overhead wire W has been removed is removed from the D-shaped arm 25 in sequence. Attach an insulation protection cover C to each overhead line W (see figure (
b)), then remove the insulator cover 24a covering the lead-in insulator 24 to be removed, and remove the overhead wire W from the lead-in insulator 24.
4 and temporarily placed on the unremoved bow insulator 24, and finally, the double nut 24b of the draw insulator 24 is removed and the draw insulator 24 is removed from the D-shaped arm 25.

However, when the removal of the lead-in insulator 24 is completed, the same figure (
As shown in d), straps 28a, 28a, tension insulators 29a, and retaining clamps 30a, 30
The bolts 32 are inserted and installed by aligning the bolt insertion holes of the straps 28a, 28a installed at the ends of the left and right pair of retaining devices 31 consisting of a with the mounting holes 27 after the removal of the lead-in insulator 24. After that, each overhead wire W is tensioned, and the overhead wire W is
The current situation is that the overhead lines W have been switched to a tie-down pole-mounted type of overhead line W.

[Problem to be solved by the invention]

However, in the tie-down construction method, which changes the conventional overhead wire W of the lead-in pole installation method to the overhead wire W of the tie-down pole installation method, a worker on board the packet 22 first removes the wire from one lead-in insulator 24. When temporarily placing overhead wires W on other lead-in insulators 24, if the removal work is performed on live wires, as described above, each overhead wire W must be fitted with an insulation protection cover. The work is troublesome, and the insulator cover 24a
When removing the insulator cover 24a,
It was necessary to cut the adhesive tape 24e by applying the knife 24d along the line, which was very dangerous and difficult. Furthermore, when removing the overhead wire W from the lead-in insulator 24, sufficient care must be taken not to hold or drop the overhead wire W, and when removing the double nut 24b that fixed the lead-in insulator 24, the packet 22 is usually removed. Due to the fact that the work was carried out on the side of the road, the worker who removed the double neck 24b had to lean considerably outside the packet 22 to reach the position of the double neck 24b, which was very dangerous. Also, straps 28a, 28a, tension insulators 29a, 2
The pair of left and right retaining devices 31 consisting of the retaining clamp 9a and the retaining clamps 30a, 30a are installed in the state shown in FIG. 3(d).
) are connected in a free state, making them difficult to handle, so normally two people are required to do the work, one supporting the tension insulators 29a and 29a, and the other supporting the bolt holes 27 of the D-shaped arm 25. On the other hand, the bolt insertion holes of the straps 28a and 28a must be matched, which is extremely inefficient. In addition, in order to fix the straps 28a, 28a to the D-shaped arm 25, the operator must lean out from the packet 22 again in the same manner as in the case of removing the double nut 24b described above, and is forced to perform a considerably difficult task. As mentioned above, implementing an aerial work vehicle equipped with the equipment to carry out the work has various problems, such as the fact that each work is too complicated to carry out.

[Objects of the Invention and Means for Solving the Problems] The present invention has been made in view of the above-mentioned problems, and its purpose is to connect overhead wires of the lead-through type to the poles. In order to efficiently carry out pole mounting work for changing to overhead lines, tension insulators and tie-downs are attached to a pair of arms at symmetrical positions on the left and right sides of the existing disassembly type arms attached to utility poles via straps. A retaining device in which clamps are successively connected is arranged, and the arms of the retaining device are fixed to the sides of the upper and lower horizontal arms constituting the existing disassembly type arm, and After locking the overhead wires sheathed to the installed lead-in insulators with the respective retaining clamps of the above-mentioned retaining device, the overhead wires sheathed to the lead-in insulators are cut on the left and right sides of each lead-in insulator, and the existing By removing the vertical arm part that makes up the disassembly type arm and simultaneously removing each of the existing lead-in insulators, it is possible to change the overhead wire of the lead-in pole mounting method to the overhead wire of the tie-down pole mounting method. The object of the present invention is to provide a method for retaining overhead wires.

[Function] The present invention employs the above-mentioned method of retaining overhead wires to change the overhead wires of the overhead line system to the overhead wires of the retaining pole system. Remove the existing overhead wire W, which is wired to the arm using the lead-in pole installation method, from the lead-in insulator to be removed and temporarily place it on another lead-in insulator, and use the hole to install the removed lead-in insulator. There is no need for the complicated work of repeatedly attaching straps, tension insulators, retaining clamps, etc. of the tie-down pole mounting method, and therefore it is extremely easy to switch from the pull-through pole mounting method to the tie-down pole mounting method. Moreover, since it is possible to introduce an aerial work vehicle equipped with a manipulator device for the work, it is possible to significantly shorten the work time and ensure sufficient safety of the work.

[Example] Hereinafter, an example of the method for retaining overhead wires according to the present invention will be described in detail with reference to FIG. 1 and FIGS. 2(a) to 2(c).

In the figure, l is a manipulator operation chamber 3 at the tip of the boom 2.
It is an aerial work vehicle equipped with a manipulator device 4,
Reference numeral 5 denotes a manipulator device 4 installed at the front of the manipulator operation chamber 3 from the back of the manipulator operation chamber 3.
This is a lifting device constructed so that it can be viewed above.

Reference numeral 8 designates a retaining device 8 that is to be lifted by the lifting device 5 and attached to a disassembly type arm (hereinafter referred to as a lower type arm) 7 of the utility pole 6. Arm 83.8a and left and right arm 8a, 8a
straps 8b attached at predetermined intervals above and below,
Tension-resistant insulators 8C18 corresponding to 8b and 8b respectively
A8e... is a bolt hole formed by connecting c58C and retaining clamps 8d, 8d, 8d.

The above-mentioned type arm 7 adopted in this embodiment has horizontal arms 7a, 7a arranged in parallel in the upper and lower positions, and a vertical arm 7c, which is attached vertically between both the horizontal arms 7a, 7a by a pole 7b... It is a removable type arm 7 composed of three members, and left and right arms constituting the retaining device 8 are attached to the sides near the tips to which the vertical arms 7C of the horizontal arms 7a and 7a are attached. Bolt holes 7d, 7d for attaching 8a, 8a are drilled.

Hereinafter, the procedure for carrying out the method for retaining overhead wires according to the present invention using the retaining device 8 having the above-described configuration will be explained.

First, the work procedure is as shown in Fig. 2 ((13-(c)) without removing the existing overhead wire W, which is covered by the D-shaped arm 7, from the insulator 10 by the lead-in column installation method. , the restraining device 8 assembled on the ground is lifted up by the lifting device 5 D
Lift the mold arm 7 upwards, align the upper end of the D-shape arm 7 between the left and right arms 88 and 8a arranged vertically,
By operating the lifting device 5, the retaining devices 8 hoisted to the left and right sides of the D-shaped arm 7 are slowly lowered to lower the left and right arms 8.
a and 8a vertically along both sides of the D-shaped arm 7, and bolt holes 8e drilled above and below the left and right arms 8a and 8a.
The retaining device 8 is fixed to the D-shaped arm 7 by aligning the bolt holes 7d, 7d drilled in the sides of the upper and lower horizontal arms 7a, 7a of the D-shaped arm 7, and inserting the bolt 9 therethrough.

After that, as shown in FIG. 2(C), the retaining device 8
Clamp the corresponding three-phase overhead wires W with the retaining clamps 8d, 8d, and 8d that constitute the Then, by removing the vertical arm 7C from the upper and lower horizontal arms 7a, 7a, the existing lead-in insulators 1O still attached to the vertical arm 7C of the D-shaped arm 7 are removed integrally, and the lead-in insulators 10 according to the present invention are removed. All work to tie down overhead wires using the wire tie-down method has been completed.

As mentioned above, since the existing overhead wires of the lead-in pole mounting method are to be changed to the overhead wires of the tie-down pole mounting method, the existing overhead wires that are wired in the lead-through pole mounting method to the D-type arm W
There is no need to temporarily place the insulator IO on the existing lead-in insulator IO as was done with the conventional overhead line switching method, and the straps 8b, 8b, 8b and tension insulator 8 used in the tie-down column installation method are not required.
Since the C18C18c and the retaining clamps 8d, 8d, and 8d are assembled in advance on the ground as the retaining device 8, there is no need to assemble them to the D-shaped arm 7 at a high place as in the conventional work. Therefore, it is extremely easy to switch from the lead-in pole mounting method to the tie-down pole mounting method.
Furthermore, as explained in the above embodiment, it is possible to use the aerial work vehicle 1 equipped with the manipulator device 4 for the work, which greatly reduces the work time and makes the work safer.

In the above embodiment, the switch 11 is attached to each of the retaining clamps 8d, 8d, 8d of the pole-mounted retaining device 8 and the D-shaped arm 7.
For work on connecting lead wires when equipped with
This method has been omitted because it is the same as the conventional construction method.

〔Effect of the invention〕

As explained in detail above, the present invention sequentially connects tension insulators and retaining clamps via strut knobs to the left and right symmetrical positions of an existing disassembleable arm mounted on a utility pole. At the same time, the eyelids of the retaining device are fixed to the sides of the upper and lower horizontal arms constituting the existing disassembly type arm, and the pull-through attached to the disassembly type arm is installed. After locking the overhead wires sheathed to the insulators with the respective retaining clamps of the retaining device, cut the overhead wires sheathed to the lead-in insulators at the left and right sides of each lead-through insulator, and then By removing the vertical arm part that makes up the existing disassembly-type arm without removing it, you can change the overhead wire of the pull-through pole-mounting method to the overhead wire of the tie-down pole-mounting method. Existing overhead wires that are wired using the lead-in pole installation method are removed from the lead-in insulator to be removed and temporarily placed on other lead-in insulators, and the removed lead-in insulators are installed using the holes. There is no need for the complicated work of repeatedly attaching straps, tension insulators, retaining clamps, etc. of the tie-down pole mounting method, and therefore it is extremely easy to switch from the pull-through pole mounting method to the tie-down pole mounting method. Moreover, since it is possible to introduce an aerial work vehicle equipped with a manipulator device to the work, it has various excellent effects such as significantly shortening the work time and ensuring sufficient safety of the work.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing how to implement the method of retaining overhead wires using the retaining device according to the present invention using an aerial work vehicle equipped with a manipulator device, and Figure 2 (a) is D
An explanatory diagram illustrating how to attach a retaining device to a D-type arm using the overhead wire retaining method according to the present invention. Figure (b) shows the state in which the retaining device is attached to a D-type arm. FIG.
), (b), (c), (d), and (e) are explanatory diagrams showing the conventional overhead wire switching method, and (a) is a perspective view showing how the overhead wire is temporarily supported; Figure (b) is a perspective view showing the first stage of the conventional overhead line switching method, Figure (C) is a perspective view of the main part showing the state in which the lead-in insulator is removed, and (d) is the removal of the conventional retaining device. Attached is a perspective view of the main parts showing the condition, (e
) is a perspective view of a main part showing a state in which a retaining pole is installed using the conventional overhead line switching method. 1... Aerial work vehicle, 2... Boom, 3... Manipulator operation room, 4... Manipulator device, 5...
・Lifting device, 6... Telephone pole, 7... Disassembly type arm, 7a... Horizontal arm, 7b... Bolt, 7C
... Vertical arm, 8... Retaining device, 8a... Glazing, 8b... Strump, 8C... Tension-resistant insulator, 8d
...Retaining clamp, 8e...Bolt hole, 9...Bolt, 10...Leading insulator, W...Overhead wire, X...
- Cutting point.

Claims (1)

[Claims] In the overhead line conversion method, which changes a lead-in pole-mounted overhead line to a tie-down pole-mounted overhead line, a pair of arms are attached to the left and right symmetrical positions of the existing disassembleable D-type arm attached to the utility pole. A retaining device in which a tension insulator and a retaining clamp are successively connected via a strap is arranged, and the arms of the retaining device are attached to the sides of the upper and lower horizontal arms constituting the existing disassembleable D-type arm. After securing the overhead wires sheathed to the lead-in insulators attached to the disassembleable D-shaped arm with each retaining clamp of the retaining device, each overhead wire sheathed to the lead-in insulators is By cutting the lead-in insulators on the left and right, removing the vertical arm part that makes up the existing disassembleable D-shaped arm, and removing each of the existing lead-in insulators, the overhead wires of the lead-in column mounting method are secured. A method for retaining overhead wires, characterized in that the overhead wires are changed to pole-mounted overhead wires.