JPH0419763B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for securing a wire that is stretched on a support arm on a utility pole through an insulator and supporting a midway portion thereof.

(Prior Art) When stretching electric wires, it is simple and inexpensive to simply support the wires in the middle.
However, this support method does not have the ability to hold the stretched electric wires to the utility poles. For this reason, if the electrical poles located on both sides of the construction section where the electrical wires will be cut during construction work are in a continuous state, the electrical wires under tension cannot be supported by the cutting process.

In order to deal with this, in the past, only every few utility poles were made to have a double-brake structure that had the function of anchoring them to the pole.

(Problems to be Solved by the Invention) However, in the conventional tensioning method, the wires are often supported on utility poles located at the ends of the construction zone in a continuous state. In this case, since the utility pole does not have the function of retaining the wire, the effects of cutting due to construction work will extend to the utility pole that has both retainers, and the construction area will expand meaninglessly. This requires extra bypass cables and expands the power outage area.

For this reason, it is desired to change the wires in the running state to double-braced wires in advance, but this has not yet been realized due to problems such as work safety and power outages required for the change work.

Therefore, it is an object of the present invention to provide a method for making a through wire into a stop that can meet such demands.

(Means for solving the problems) In order to achieve the above objects, the present invention has the following features:
A wire supported by an insulator on a support arm attached to a utility pole is supported in place of the insulator by a jack placed between it and the area around the utility pole, and in this state, the existing insulator can be pulled alone or together with the existing support arm. In addition to replacing the tension insulators in two directions for fastening, we also installed an extension tool, and connected each retaining clamp that grips both sides bordered by the newly installed support arm of the through wire with the extension tool facing the same side. , by aligning each retaining clamp with the tension insulator on the same side using the expandable tool and connecting both, both sides of the newly installed support arm of the wire are held in place by the tension insulator. shall be.

(Function) The wire is supported in place of the insulator on the existing support arm by the jacks applied between it and the pole, so after this support the existing insulator itself or the support arm can be cut off from the wire. be done. This allows the existing insulator to be removed alone or together with the support arm without affecting the through wires.

In addition, in place of the existing insulators or support arms that will be removed, it is possible to install new insulators required for both retainers on the utility pole, either alone or for each support arm, and to install extensions and retractors necessary for changing to double retainers. This can be done safely and easily without line interference, which makes it possible to make most of the preparations for changing to tie-down supports.

Another preparation is to hold the wire on both sides bounded by the support arms by the retention clamps that serve as the retention connections, with each retention clamp placed on the support arm facing the same side. It is possible to make the threaded wire double-determined by connecting it to a telescoping device, which aligns each detention clamp with the tension insulator on the same side and connects them to each other.

(Example) An embodiment of the present invention will be described below.

The electric wire 1 shown in FIG. 1 is shown as a wire passed through the wire.
This electric wire 1 is supported halfway by an insulator 5 on a support arm 4 attached to a utility pole 2 with a U bolt 3, and is made into a threaded wire. The insulator 5 is mounted upright on the support arm 4, receives and supports the electric wire 1 at the fork part 5a at the upper end, and a cover plate 6 fitted from above to the fork part 5a is secured by bolts 7 and nuts 8. It is fixed to prevent the electric wire 1 from coming off. A plurality of electric wires 1, usually three or four, are supported on the support arm 4.

To hold the electrodes 1 in place, for example, a jack 10 as shown in FIG. 2 is used instead of the insulator 5 to temporarily support the electric wire 1. It is preferable to use a jack 10 having U-shaped wire receivers 11 corresponding to the number of wires 1 supported by the support arm 4, as shown in the figure. Each wire receiver 11 is stably supported by two extendable tools 12 that can be used fixedly, and an extendable tool 13 that can be used in a hinged state, and each pair of extendable tools 12 and 13 are fastened to the utility pole 2. The base is hingedly attached to a base 15 which is fastened and fixed by a metal fitting 14, and the electric wire receiver 11 supported by a pair of telescoping metal fittings 12 and 13 is shown in FIG. , Fig. 3. The position can be freely adjusted in the X and Y directions.

Although any type of base 15 may be used, it is convenient to use a base 15 as shown in the figure, which can be used in combination as many as the number of wire receivers 11 required. At that time, each base 15 can be connected with a stay 16 or the like as necessary to easily obtain support strength. A stopper 17 is provided at one end of the receiving port of each wire receiver 11, and a movable retaining pawl 18 is provided at the other end and is held in an outwardly open position and is latched to the stopper 17.

The jack 10 is used by being attached to a telephone pole 2 as shown in FIG. In this installed state, by adjusting the length of the telescopic tools 12 and 13 that support each wire receiver 11, the corresponding wire 1 is supported in place of the insulator 5. Move sequentially from position to position.

The lengths of the extendable members 12 and 13 are adjusted depending on their structure, for example, whether they are hydraulic cylinders, pneumatic cylinders, or mechanically equipped with a built-in turnbuckle mechanism. In the case shown in the figure, it is a mechanical one with a built-in turnback mechanism, and is performed by externally operating a rotation operation section 21 provided at the base of the extendable tools 12, 13.

When supporting the electric wire 1 with the jack 10 instead of the insulator 5 as shown in the imaginary line in FIG. 3, remove the nut 8 and cover plate 6 as shown in FIG. Make it so that it can be lifted from 5a. As a result, when the wire receiver 11 is moved upward from below the wire 1 to the solid line position and the imaginary line position in FIG. It is fitted into the wire receiver 11 in a state in which it is pushed open downward against the bias (solid line state), and thereafter lifted and removed from the bifurcated portion 5a of the insulator 5, at the same time being supported in place of the insulator 5.

When each electric wire 1 is supported in this way, the electric pole 2
The existing support arm 4 and insulator 5 attached to the pole can be removed from the utility pole 2 without affecting the electric wire 1 supported by the jack 10 with the wire still running. This removal is performed by removing the existing support arm 4 along with the insulator 5. Therefore, the complicated work of individually removing each insulator 5 from the support arm 4 at a high place is unnecessary.

Next, while the electric wire 1 is supported by the jack 10, a newly installed support arm 31 as shown in FIG. 4 is attached to the utility pole 2 in the same manner as the removed existing support arm 4. As shown in Fig. 4, this newly installed support arm 31 has a tension insulator 32 necessary for retaining support and a telescopic tool 33 necessary for changing to retaining support being connected in advance, so that they can be used at high places. It is not necessary to attach them individually, and it can be done without affecting the electric wire 1 supported in the wire state by the jack 10, and it is a preparation for attaching the above-mentioned accessories to the utility pole 2 and holding the electric wire 1 in place. Most are finished.

Since it is necessary to hold the electric wire 1 on both sides of the support arm 31, tension insulators 32 are installed on both sides of the support arm 31.
are connected. This connection is achieved by connecting the base of the tension insulator 32 to the tip of a movable arm 35 whose one end is connected to the support arm 31 through a shaft 34 through a shaft 36. The rotation of the movable arm 35 about the axis 34 and the rotation of the tension insulator 32 itself about the axis 36 allow the electric wire 1 to be freely connected in any direction. As a result, the electric wire can be easily supported on the support arm 31 even in a position different from that of the existing insulator 5.

The same extendable tool 33 as that of the jack 10 is adopted, and is connected to both sides of the support arm 31 facing each tension insulator 32. This connection is achieved by connecting the proximal end of the extendable tool 33 to a support fitting 37 detachably attached to the support arm 31 via a shaft 38. The support fitting 37 can be attached and detached by opening and closing the locking piece 37a of the support fitting 37.

As another preparatory work, as shown in FIG. 5, the portions on both sides of the electric wire 1 bordered by the newly installed support arms 31 are held by the retaining clamps 41. This gripping is performed on the bare wire portion 1a from which the coating has been removed so that there is no sagging between the retaining clamp 41 and the electric wire 1. It is also desirable to fasten the gripping portion with bolts to ensure a firm grip.

The preparation is completed with the above steps, but the
0 should be removed as soon as it is no longer needed so that it does not interfere with other work. Therefore, by first moving the wire receiver 11 downward by adjusting the length of the pair of extendable tools 12 and 13, the wire 1 supported by the jack 10 can be moved to the newly installed support arm 3.
5, the jack 10 is removed from the utility pole 2.

In this state shown in FIG. 5, each retaining clamp 41 is connected to the distal end of the telescopic tool 33 on the same side. A retaining clamp 41 and a connecting part 5 are attached to the tip of each extendable tool 33.
A retaining aid 51 having a retaining guide roller 51b and a retaining guide roller 51b is attached. Therefore, the connection between the extendable tool 33 and the retaining clamp 41 is achieved by rotating the extendable tool 33 as shown by the arrow in FIG.
is connected to the extension connecting part 41a of the retaining clamp 41, and the retaining guide roller 51a is connected to the retaining clamp 41.
Hang it on the electric wire 1 (Figure 6).

In this state, for example, the telescopic tool 33 is moved by the remote worker 61.
to pull the retaining clamp 41 toward the support arm 31. This allows the retaining clamp 4
1 is positioned with the tension insulator 32 on the same side as shown in FIG. 6 while grasping the electric wire 1 and pulling it toward the support arm 31.

The aligned retention clamp 41 and tension insulator 32 are connected as shown in FIG. 7 by applying the tip of the tension insulator 32 to the retention connection portion 41b of the retention clamp 41 as shown by the arrow in FIG. 6.

With this, the electric wire 1 in the threaded state can be held in place on both sides. As shown in Figure 7, the electric wire 1 that has been tied up at both ends is cut between the two anchoring parts to make it into a slit state, making it convenient for individual construction between each utility pole 2. The cutting between both retaining portions of 1 may be performed either in the temporary retaining state as shown in FIG. 6 using the expandable tool 33 or in the permanent retaining state as shown in FIG. 7 using the tension insulator 32. Good, but
Power outages can be avoided if connections are made using bypass cables before disconnection. At the completion of the construction work, the left and right electric wires 1, 1 of the support arm 31 separated by the cutting are connected by jumper wires 71 as shown in FIG. 7 to avoid any problems in use.

When the construction to change to both retainers is completed, each extension tool 33
and the retaining clamp 41, and each extendable tool 3
3 from the support arm 31, the operation is simple and can be easily performed using a remote working tool. In particular, the both-side extendable tools 33 can be removed at once by removing the support metal fittings 37 from the support arm 31.

Insulating coatings 11a and 42a are applied to the U-shaped inner edges of each wire receiver 11 and 42, respectively.
Although two telescopic tools 33 are connected on the left and right sides, it is also possible to connect only one telescopic tool 33 and sequentially use it to hold the support arm 31 on both sides. Furthermore, the jack 10 can be installed on the ground around the utility pole 2 depending on the case, and the various parts can be connected and removed indirectly using various known remote working tools.

(Effects of the Invention) According to the present invention, since it has the above-described structure and operation, it is possible to safely, easily and efficiently tie up the threading wire, and the construction cost can be reduced.

[Brief explanation of drawings]

The figure shows one embodiment of the present invention.
The figure is a perspective view showing the tensioned state of the through wire, Figure 2 is a perspective view showing the installed state of the jack, Figures 3 and 4.
The figures are a side view and a perspective view showing the main preparation state using the jack in Fig. 2, Fig. 5 is a perspective view showing the preparation completion state, Fig. 6 is a perspective view showing the temporary restraining state, and Fig. 7 The figure is a perspective view showing the fully retained state. 1... Electric wire, 2... Utility pole, 4... Support arm (existing), 5... Insulator, 10... Jacket, 14
... Fastener, 31 ... Support arm (newly installed), 32
...Tension-resistant insulator, 33...Extensible tool, 41...Retention clamp.

Claims (1)

[Claims] 1. A wire supported by an insulator on a support arm attached to a utility pole is supported in place of the insulator by a jack applied between it and the area around the utility pole,
In this state, replace the existing insulator alone or together with the existing support arm with a two-way tension insulator for retaining, and install an extension and retractable device, and each retaining clamp grips both sides bordered by the support arm of the wire. and an extendable tool facing the same side, and by aligning each anchoring clamp with the tension insulator on the same side and connecting both sides, both sides of the new support arm for the through wire can be connected. A method for making a through wire into a holding state, characterized by making it into a holding state with a tension-resistant insulator.