JPS5915204Y2 - gold wheel device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a metal wheel device for extending power transmission lines that allows easy passage through joints connecting power transmission lines.

Conventionally, in order to facilitate the extension of power transmission lines, the transmission lines are jointed, and the transmission lines with the joints are passed through the metal wheels as they are and extended.

However, the joint part is mechanically weak, so a protector is attached to this part to protect it.

That is, as shown in FIG. 4A, the power transmission line 1' is suspended and extended through a metal wheel 2', and the joint portion 3' is protected by a protector 4'.

This protector 4' is made of hard rubber or a preformed armor rod, and protects the joint portion 3' from sharp bending at both ends.

As shown in Figure 4A, a protector 4' is installed before the joint part 3' of the power transmission line 1' reaches the metal wheel 2', and the metal wheel 2' is attached as shown in Figure 4A and 8. Let it pass;
This will be removed after the line extension work is completed.

This protector 4' becomes larger as the wire size increases, and the metal wheel itself also becomes larger and heavier, and it takes a lot of effort to install and remove it, which must be done at a high place in the air. Therefore, there are drawbacks that can be dangerous.

In view of this, the present invention has devised a metal wheel device that facilitates passage through the joint without using a joint protector.Two metal wheels are attached to both ends of an arm that is longer than the length of the joint and can be rotated freely. The arm is equipped with a long hole, and a hanging metal fitting is movably attached to the long hole.

Next, this will be explained in more detail based on the drawings.

Figure 1 shows an example of the metal wheel device according to the present invention.
The structure of the two gold wheels 2□, 2□ is the same as the conventional one.

These two gold wheels 2□. 2□ is rotatably attached to both ends of an arm 4 having a length l slightly longer than the length L of the joint part, and furthermore, this arm 4 is provided with a long hole 5, and the arm 4 is attached within the range of this long hole 5. The hanging fitting 6 is attached movably along the longitudinal direction of the power transmission line 1 by attaching the hanging fitting 6 to, for example, a steel tower (not shown) and suspending the metal wheel device.

Next, the extension of a power transmission line using such a metal wheel device will be explained. First, as shown in FIG. 2A, the power transmission line 1 is extended only by one metal wheel 2□ of the metal wheel device.

However, when the joint part 3 of the power transmission line 1 reaches the metal wheel 2□, the outer diameter of the joint part 3 is larger than the outer diameter of the power transmission line 1, so the joint part 3 hits the metal wheel 2 (the figure shows this state). .

) When the wire extension continues, the arm 4 rotates in the direction of the arrow in the figure, and the metal wheel 2 reaches the power transmission line 1.

To explain this in detail, the center of the metal wheel 2, that is, the point where the metal wheel 2 When each pin is defined as B, a predetermined distance exists between the center A of the metal wheel 2□ and the pin B.

When the joint part 3 hits the metal wheel 2□, the joint part 3
tries to pull the entire metal wheel 2 in a certain direction, and a component of this pulling force is generated at center A in a direction perpendicular to the straight line connecting center A and pin B.

As a result, a rotational moment is generated in the arm 4 in the direction of the arrow in Fig. 2A with the pin B of the hanging metal fitting 6 as the fulcrum and the center A of the metal wheel 2□ as the point of action, and this causes the metal wheel 2□ to connect to the power transmission line. 1
reach.

In this way, as shown in the opening of FIG. Get on 22.

The metal wheels 2 □ and 2 □ are provided through an arm 4 with a length l slightly longer than the length L of the joint part, so the metal wheels 2
The joint portion 3 comes to be located between □ and 2□ (the figure shows this state).

If the extension continues further, as shown in Figure 2, the power transmission line 1
rides on the metal wheel 2□, and the metal wheel 2□ rotates in the direction of the arrow in the figure.
The line is extended by the metal wheel 22.

In this way, the joint part 3 of the power transmission line 1 is connected to the metal wheel 20,
Since the wire is extended between the two metal wheels 21 and 2□ without passing through 2□, the wire can be safely extended without using any kind of protector at the joint portion 3.

In the above embodiment, as a means for movably suspending the arm 4 along the longitudinal direction of the power transmission line 1, a long hole 5 is provided in the arm 4, and a hanging fitting 6 is attached to the long hole 5. However, as shown in FIG. 3, for example, the arm 4 may be made of I-shaped steel, and the ends of the hanging fittings 6 may be engaged with the recesses on both sides of the web portion 7, or the arm It is also possible to interpose rollers, waterproof bearings, etc. in the retaining portion between 4 and the hanging fitting to smooth the relative movement between the two.

As explained above, according to the present invention, two metal wheels are rotatably attached via an arm longer than the length of the joint,
Since the arm was movably suspended, the power transmission line was extended by two metal wheels, and the joint passed between the two metal wheels.
Since the metal wheel itself does not pass through, even if there is a joint, the wire can be easily extended, and no large tensile force is applied to the power transmission line, so no stress or strain is caused by this, and there is no need to use a protector at the joint. , which is particularly effective in improving the efficiency and safety of wire extension work.

In addition, for the rotation and swinging of the arm when passing through the joint part, 1. Since a long hole is provided in the arm and the hanging bracket is movably attached to this long hole, the addition of parts and structural changes are kept to a minimum, making the structure of the metal wheel device extremely simple. In addition, since the arm automatically rotates and swings as the arm passes through the joint, the wire extending work becomes very easy.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing an example of the metal wheel device of the present invention, Figure 2 A9 and C are explanatory diagrams of the case where a power transmission line is extended using the metal wheel device of the present invention, and Figure 3 The figure is a side view of a main part for explaining another embodiment, and FIG. 1...Power line, 20, 2□...Golden wheel,
3...Joint part, 4...Arm,
5...Long hole, 6...Hanging fitting.

Claims (1)

[Scope of utility model registration request] A metal wheel is made by rotatably attaching two metal wheels to both ends of an arm that is longer than the length of the joint that connects the power lines, a long hole is provided in the arm, and a hanging metal fitting is movably attached to this long hole. Device.