JPH0365095B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for reinforcing an overhead grounding wire installed at the top of each utility pole while insulating it.

(Prior art) Various methods have been proposed when replacing an old existing overhead grounding wire with a new one, but all of these methods involve connecting the old grounding wire to some extent horizontally or vertically. Load is applied in the direction.

However, since the old grounding wire is old, if it becomes loose or corroded,
If these are put under strain, there is a concern that unforeseen situations may occur, such as the wires breaking or falling apart during the replacement work, and coming into contact with the overhead high-voltage distribution lines supported by the armrests of the utility poles.

(Problems to be Solved by the Invention) Therefore, it becomes undesirable to reinforce the old grounding wire before carrying out the work of replacing the overhead grounding wire.

In this regard, conventionally, devices used especially for this type of use,
There was no other special method. Therefore, the problem is how to easily and safely reinforce the old grounding wire.

(Means for Solving the Problems) The present invention has been made in response to such circumstances, and aims to solve the problems by using a lashing machine.

In other words, the existing lashing machine latches the messenger wire together with the installation wire, but this invention takes into consideration the fact that no load is applied to the old ground wire. Therefore, we have adopted a configuration that takes this point into consideration and solved the problem.

Regarding its specific configuration, first, a messenger wire is installed above and parallel to the existing overhead ground wire, and a latching machine is suspended from this messenger wire, and the latching machine is An overhead ground wire is inserted into the stator of the lashing machine, and a bundle of insulating tape is attached to the bobbin of the lashing machine, and its end is locked to the end of the overhead ground wire, so that the lashing machine is connected to the This method is characterized by reinforcing the overhead grounding wire with an insulating tape that is moved along the grounding wire and fed out from the bobbin.

(Function) If a suitable traction rope is attached to the lashing machine and the lashing machine is moved by pulling this rope, the rotor will rotate as in a normal lashing machine. Since one end of the insulating tape attached to a bobbin rotatably mounted on the rotor is locked to one end of the overhead ground wire, the insulating tape is wound spirally around the outer circumference of the overhead ground wire to cover it. I will do it. The overhead ground wire is reinforced by this insulating tape covering.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings.

1 and 2 show the side and front views, respectively, of the lashing machine 1 used in this embodiment. A substantially cylindrical rotor 3 is located in an annular recess at the center outer periphery of a substantially cylindrical stator 2. is provided and is rotatable around the outer periphery of the stator 2. In addition, 2a is stator 2
represents the opening.

Appropriate shafts are fixed to the outer periphery of the rotor 3, facing each other across the center (that is, at both ends of the diameter), and a bevel gear 5, which is integrated with the bobbin 4, rotates on each shaft. A butterfly bolt 6 is screwed onto the shaft from outside the central axis of the bobbin 4 to prevent the bobbin 4 from coming off. Therefore, by loosening the butterfly bolt 6, the bobbin 4 can be removed. Further, the outer collar body 4a of the bobbin 4 is screwed onto the main body of the bobbin 4 so that it can be separated from the bobbin 4 at will.

Reference numeral 7 denotes a brake device provided on the outer periphery of the rotor 3, and by appropriately turning a knob 7a thereof, the base of the bevel gear 5 is pressed and its rotation is controlled.

Flange bodies 8 and 9 are provided near both ends of the stator 2, respectively, and a front door 10 is rotatably provided on one side of the collar body 8 by means of a lock pin 11. When this lock pin 11 is pulled in the direction of arrow A in FIG. 1, the locked state is released and the front door 10
is rotatable toward the front in the figure about the opposite end of the lock pin 11.

On the other hand, a rear door 13 is rotatably provided on the other side of the flange 9 via a bevel gear 12 with a lock pin 14. When the lock pin 14 is pulled in the direction of arrow B in FIG. It has been canceled,
The rear door 13 is rotatable in the direction of the arrow in FIG. The bevel gear 12 is fixed to the collar body 9 with screws 15 and meshes with each bevel gear 5 that is integrated with the bobbin 4.

A hanging plate 1 is provided above the end of the stator 2 on the side of the flange body 8.
A roller frame 18 having a substantially inverted L-shape is further fixed to the hanging plate 16 with bolts 17.

At the front and rear ends of this roller frame 18, two hanging rollers 19 are rotatably supported at each location, up and down. Regarding the right side), one end of a shaft 20 having a hanging roller 19 rotatably but not detached from the shaft 20 is fixed to the roller frame 18 vertically at regular intervals. The lower part of the roller door 21 having the notch 21a above is rotatably fixed to the other end of the lower shaft 20, and the upper notch 21a is fixed rotatably to the other end of the lower shaft 20.
is hooked onto the other end of the upper shaft 20, and a knob 22 is screwed onto it.

Therefore, when the knob 22 is loosened, the roller door 21
The pressing state of the roller door 21 toward the shaft side is released, and the roller door 21 is removed from its notch 21a and becomes freely rotatable in the direction of arrow C in FIG.

Similarly, for the front side (left side in the figure) of the roller frame 18, the hanging roller 19 is attached.
2 are rotatably supported vertically, and are held by a roller door 21 and a knob 22.

A hook 23 for tying up a towing rope is also fixed to the front side of the hanging plate 16.

The lashing machine 1 used in this embodiment has the above-mentioned configuration, and when it is used, as shown in FIGS. ’ is set. Note that the insulating tape bundle 24' is a spare one, and for convenience, when one insulating tape bundle 24 runs out of tape during reinforcement, it is supplied from this insulating tape bundle 24'. It's on.

Next, the actual implementation situation will be explained with reference to FIG. 3. In this example, the work was carried out prior to the implementation of a special "false arm construction method" which is a construction method for replacing overhead grounding wires.

That is, in this false arm construction method, a rail body 35 that bypasses the high voltage distribution line 34 is passed between the top of the main body 33 of the ground wire cap and the tip of the arm 32 on the arm 32 of each utility pole 31, and the old overhead ground wire 36 is When pulling down and pulling up the new line 37, each of these lines is supported by a moving member 38 provided on the rail body 35 to carry out such work.

In this embodiment, the wire is first used to reinforce the old overhead grounding wire 36 before pulling it down.

First, appropriate support fittings 39 are fixed to the top of each line cap body 33, and appropriate messenger wires 40 are installed between the respective support fittings 39.
The installation situation at this time is to install above and parallel to the old overhead grounding wire 36, and in this case, the messenger wire 40 and the old overhead grounding wire 3
6 is approximately the same as the distance between the center of the stator 2 and the hanging roller 19 in the lashing machine 1.

Then, remove the roller door 21 of the lashing machine 1 and attach the hanging roller 19 to the lashing wire 4.
After placing it on one end of 0, return the roller door 21,
Lashing machine 1 and lashing wire 4
hang it at 0.

On the other hand, the front door 10 and rear door 13 of the lashing machine 1 are opened to allow the old overhead ground wire 36 to be inserted into the stator 2. Then, a tape is let out from one insulating tape bundle 24 set on the bobbin 4, and one end of the tape is latched to the end of the old overhead grounding wire 36. Then lashing machine 1
When a worker 42 ties one end of a towing rope 41 to the hook 23 and pulls the other end of the rope 41 below the utility pole 31, the stator 2 will move as shown in FIG. As the rotor 3 moves in the direction of the arrow D, the insulating tape 24a is unwound from the bundle 24 of the insulating tape on the bobbin 4, and as the rotor 3 moves in the direction of the arrow E,
By rotating in the direction, the outer periphery of the old overhead grounding wire 36 is coated in a spiral manner.

(Effects of the Invention) According to the present invention, the old overhead grounding line can be reinforced simply by moving the lashing machine installed on the old overhead grounding line. Further, such work can be easily and safely carried out by attaching a suitable traction rope to the lashing machine and pulling the rope under a telephone pole or the like.

Furthermore, since the insulation tape is used for reinforcement, the old overhead grounding wire can be insulated at the same time as reinforcement. Therefore, the old overhead grounding wire reinforced by this invention can not only be prevented from coming loose and have improved tensile strength, but also in the unlikely event that it breaks during the work of replacing the overhead grounding wire and comes into contact with a high-voltage distribution line. It is safe to do so.

Moreover, since the old overhead grounding wire reinforced by this invention has sufficient strength, the range of options for replacing the grounding wire is widened.

In other words, the replacement method shown in the example is a special method devised to place as little stress on the old overhead grounding wire as possible, but if this invention is used, a large number of suitable gold wheels can be installed on the old overhead grounding wire itself. The so-called "moving metal wheel construction method" involves suspending the new wire, supporting the new wire on this metal wheel, and extending the metal wheel sequentially along the old overhead grounding wire to replace the old overhead grounding wire with the new line. This also makes it possible to use the ring construction method.

[Brief explanation of drawings]

1 and 2 are a side view and a front view, respectively, of the lashing machine used in the example, and FIG. 3 is a perspective view showing the case where the example is used simultaneously with the false arm construction method.
FIG. 4 is a side view of main parts showing the implementation state of the embodiment. In the figure, 1 is a lashing machine, 2 is a stator, 3 is a rotor, 4 is a bobbin, 15 and 12 are bevel gears, 19 is a hanging roller, 24 and 24' are each a bundle of insulating tape, and 36 is a former overhead ground wire,
40 is a messenger wire.

Claims (1)

[Claims] 1. Install a messenger wire above and parallel to the existing overhead grounding wire, suspend the lashing machine from this messenger wire,
An overhead ground wire is inserted into the stator of the lashing machine, and a bundle of insulating tape is attached to the bobbin of the lashing machine, and its end is latched to the end of the overhead ground wire. A method for reinforcing an overhead ground line using a lashing machine, which comprises moving the lashing machine along the overhead ground line and reinforcing the overhead ground line with insulating tape fed out from a bobbin.