JPH0452686B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is directed to a tool for fixing both wires, which is used to re-support a wire that has been stretched in a wire-through state on a utility pole in a double-stop state. It is related to.

(Prior Art) Originally, electric wires were only supported through insulators attached to support arms or the like on utility poles.

By the way, the existing electric wires, which had been strung in a continuous state due to the simple and inexpensive construction, are now double-braced so that even if a wire is cut due to construction, the section adjacent to the construction section will not be affected by the cut. Recently, it has become desirable to change the state in advance.

(Problems to be Solved by the Invention) Such a change requires that the through wire be temporarily separated from the existing support means and supported. Japanese Utility Model Publication No. 36-2273 discloses a wire holder for live wire work that can accomplish this.

However, this method utilizes a plurality of wire holding rods having different lengths and supporting heights for each live wire.
For this reason, it is necessary to select and adjust the length of the wire holding rod for each wire, and select the support height to the utility pole.
The wire holding rod has to support the wire in a wired state at a position removed from the existing support arm and insulator, and then support it on the utility pole, which makes the work complicated. Therefore, it is conceivable to use a telescoping tool as the wire holding rod.

FIGS. 5 to 7 show an example of this, and will be explained below.

FIG. 5 shows the electric wire 1 as a wire. This electric wire 1 is threaded through an insulator 5 on a support arm 4 which is attached to a utility pole 2 by a U bolt 3 and supported in the middle. The insulator 5 is installed upright on the support arm 4, and the electric wire 1 is attached to the forked part 5a at the upper end.
is received and supported, and a cover plate 6 fitted from above the bifurcated portion 5a is fixed with bolts 7 and nuts 8,
Prevents 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 electric wires 1 in place, a jack 10 for electric wire work as shown in FIG. 6, for example, is used as a temporary support for the electric wires 1 instead of the insulator 5. The jack 10 preferably has 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 an extendable tool 12 that can be used fixedly thereon, and an extendable tool 13 that can be used in a hinged state. FIG. 7 shows the electric wire receiver 11 which is mounted by hinge-connecting the base on the base 15 which is fastened and fixed by the fastening fittings 14, and supported by the pair of telescoping tools 12 and 13 by adjusting their expansion and contraction individually. The position can be freely adjusted in the X and Y directions shown in the figure.

Although any type of base 15 may be used, it is convenient to use a base 15 as shown in FIG. At that time, each base 1
5 can be easily connected with a stay 16 or the like as necessary to obtain supporting 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 lengths 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 turnbuckle mechanism. In the case shown in the figure, it is mechanical with a built-in turnbuckle 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. 7, the nut 8 and cover plate 6 are removed from the insulator 5 as shown in FIG. Make sure you can lift it from the ground. 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 1 without affecting the electric wire 1 supported by the jack 10 with the wire running through it. 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.

However, even if the wire 1 in a wire-through state can be easily separated from the existing support means and supported, in order to re-support the wire 1 in a double-retained state with a newly installed support device, it is necessary to More complicated operations are required because the wire must be cut while being kept in tension and each cut end must be placed on a new support.

No work tool has yet been proposed that can do this simply, efficiently, and safely.

SUMMARY OF THE INVENTION Therefore, the present invention provides a tool for double-retaining a through-wire, which makes it possible to easily and efficiently and safely perform work to double-retain a through-wire that has been temporarily separated and temporarily supported from an existing support arm and an existing insulator. The purpose is to provide the following.

(Means for solving the problems) In order to achieve the above objects, the present invention has the following features:
A support arm for new installations that can be attached to utility poles.
A pair of tension insulators extending from the support arm on both sides are connected, and a pair of telescoping devices swingably extending on both sides of the support arm are connected to a support removably attached to the support arm. A feature is that a retainer is provided at the tip of each extendable tool to clamp and hold the electric wire.

(Function) According to the above configuration of the present invention, by attaching the new support arm to the utility pole, one side of each of the pair of tension insulators and the pair of extensible tools attached to the new support arm is attached. and each other side can be made to run near both side portions of the existing electric wire in a running state of the utility pole.

For this reason, when the pair of telescopic tools are extended, contracted and swung, the retaining devices provided at the tips of the respective telescopic tools are positioned at the required retaining portions on both sides of the existing electric wire pole. The cables on both sides of the utility pole can be clamped with a retainer, and even if the existing wires are unsupported from the existing support arm or are further separated between the two clamped points, the electrical wires on both sides of the utility pole can be secured By continuing to hold it to the side and support it, it enters a temporary locking state that allows connection using jumper wires.

Then, when each extension tool is expanded or contracted, the positions of both sides of the existing electric wire pole that are clamped by the retaining tools at their tips are separated and stretched, and the required positions on both sides of the existing electric wire pole are adjusted as described above. By aligning and connecting to the tip of each tension insulator, the tension insulators on the newly installed support arm can switch to support in the main tensioned state, and after this, the support can be connected to this. By removing the extensions and fasteners from the newly installed support arm, it is possible to avoid them remaining attached and becoming a nuisance or hindrance.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 5 to 7.

The jack 10 for electric wire work is attached from the insulator on the existing support arm by the method shown in FIGS. 5 to 7 above.
A support arm 31 as shown in FIG. 1 is used as a new support arm 31 to double-retain an existing wire 1 that has been removed and supported by the telescopic tools 12 and 13.

This newly installed support arm 31 is installed in place of the existing support arm 4 using the same method shown in FIG.
Utility pole 2 (not shown in Figures 5 to 7) (not shown in Figures 5 to 7)
(Fig.). As shown in FIG. 1, this newly installed support arm 31 includes a tension insulator 32 necessary for retaining support and an extendable member 33 necessary for changing to retaining support.
Since the wires are connected in advance, there is no need to perform these operations separately at a high place, and the wires 1, which are supported as wires by the jacks 10, can be carried out without affecting the wires 1. Most of the preparations for holding the electric wire 1 are completed.

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 extendable member 33 is the same as that of the jack 10, 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. 2, 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.
2, the jack 10 is removed from the utility pole 2.

In this state shown in FIG. 2, each retaining clamp 41 is connected to the distal end of the telescopic tool 33 on the same side. A retaining aid 51 having a connecting portion 51a with the retaining clamp 41 and a retaining guide roller 51b is attached to the tip of each extendable tool 33. Therefore, the connection between the extendable tool 33 and the retaining clamp 41 is made using the extendable tool 33.
Rotate it as shown by the arrow in FIG.
A is connected to the extension connecting part 41a of the retaining clamp 41, and the retaining guide roller 51 is connected to the retaining clamp 41.
Hang a on the electric wire 1 (Figure 3).

In this state, for example, the telescopic tool 33 is connected to the remote work tool 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. 3 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. 4 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. 3.

With this, the electric wire 1 in the wired state can be held at both ends. The electric wire 1, which has become a double-retainer, is cut between the two retainers to create an edge-cut state, as shown in Fig. 4.
The support arm 31 separated by this cutting is designed to be convenient for independent construction between each utility pole 2.
The left and right electric wires 1, 1 are connected by jumper wires 71 as shown in FIG. 4 to avoid any problems in use.

Cutting the wire 1 between both retaining parts in a wire-through state is as follows:
Temporary retention state as shown in FIG. 3 by the extendable tool 33,
Alternatively, this may be carried out in any state such as the main holding state using the tension insulator 32 as shown in FIG. 4, but if the connection is made using the jumper wire 71 before the cutting, a power outage can be avoided.

Insulating coatings 11a and 42a are applied to the U-shaped inner edges of each wire receiver 11 and 42, respectively.
Further, the wire receiver 11 and the extendable tool 12 fixed thereto may be integrated from the beginning, but it is convenient if the direction of the wire receiver 11 with respect to the extendable tools 12 and 13 can be adjusted. It is preferable to connect the extendable tool 12 with a hinge so that the direction can be changed, and to attach a fastening tool such as a fastening bolt to fix it after adjusting it to an arbitrary direction.

(Effects of the Invention) Since the present invention has the above-described structure and operation, a support arm for new installation can be attached to a utility pole, and the existing electric wire can be passed through using a retaining device at the tip of a pair of extension devices provided thereon. By simply clamping the required positions on both sides of the utility pole, the wires can be removed from the existing support arms, or even if they are separated between the clamps, the support structure and support provided by the existing support arms can be maintained. It is possible to connect using jumper wires by continuing to support both sides of the pole regardless of the situation, and by expanding and contracting the extension tool, the necessary positions on both sides of the existing electric wire pole are extended to both sides of the new support arm. By aligning the ends of a pair of tension insulators and connecting them, the newly installed support arm can switch to a state in which both sides are held in place, preventing the wires from coming off or hanging down during work. Since no complicated tools or work are required, the work can be carried out easily and safely, and depending on the timing of the jumper wire connection, power outages can also be avoided.

In addition, by removing the support from the newly installed support arm along with the telescoping device and the retaining device connected thereto, it is possible to avoid the situation where these remain attached and become a hindrance or trouble.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, and Figure 1 shows a wire in a running state, which is removed from an existing support arm using an electrical work jack, and is supported by both ends. A perspective view showing the initial preparation stage, showing the relationship with a newly installed support arm attached to a utility pole so as to support the electric pole, Figure 2 is a perspective view showing the completed preparation state, and Figure 3 is a perspective view showing the temporarily secured state. Figures 4 and 4 are perspective views showing the fully-retained state, and Figures 5 to 7 show an example of a possible method for removing and supporting an existing wire in a threaded state. Figure 5 is a perspective view showing how the wire is stretched, Figure 6 is a perspective view showing how the jack for electrical work is installed using a telescopic tool, and Figure 7 is the jack for electrical work shown in Figure 6. FIG. 3 is a front view showing a state in which the used electric wire in a wired state is removed from an existing support arm and supported. DESCRIPTION OF SYMBOLS 1... Electric wire, 2... Utility pole, 31... Support arm, 32... Expandable tool, 33... Tension insulator, 3
4, 36, 38...axis, 35...movable arm, 3
7...Supporting metal fitting, 41...Retaining clamp, 51...
...Retention aid.

Claims (1)

[Claims] 1 Connect a pair of tension insulators extending on both sides from this support arm to a newly installed support arm that can be attached to a utility pole, and connect both sides of the support arm to a support that is removably attached to the support arm. 1. A double-clamping device for a through-wire, characterized in that a pair of telescopic tools that swingably extend are connected to each other, and a retaining tool for clamping and holding an electric wire is provided at the tip of each of the telescopic tools.