JPH02119514A - Bypass device at tower top for overhead cable self-running machine - Google Patents

Abstract

PURPOSE:To allow a self-running machine having versatile use with only a linear travelling function to pass through by providing a rotatable turn rail set to the top of a supporting tower and a bypass member whose one end is connected close to a strain clamp of the overhead cable and the other end is integrated with the clamp. CONSTITUTION:By providing a rotatable turn rail 9 set to the top 2 of a supporting tower and a bypass member 12 whose one end is connected close to a strain clamp 3 of an overhead cable 1 and the other end is integrated with that clamp 3, a self-running machine 24 having versatile use with only a linear travelling function can pass through.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an overhead cable self-propelled machine that runs on an overhead cable for inspection of the overhead cable, etc. The present invention relates to a tower top bypass device for an overhead cable self-propelled aircraft, each for passing through a support tower section held at the tower top via a tension clamp.

[Prior art] Overhead cable self-propelled machines (hereinafter simply referred to as self-propelled machines), such as inspection robots that run on overhead cables with their own blades and inspect minute damage etc. on the external surface of overhead cables using a television camera, are Since it is not possible to directly pass through the steel tower section where the steel is tension clamped, a bypass device is required in order to pass through the steel tower section.

Among the above-mentioned bypass devices, the first one is the conventional bypass device for self-propelled aircraft on steel towers, in which the overhead ground wires of the left and right spans with horizontal angles are held at the top of the tower using tension clamps.
To explain with reference to the plan view of Figure 0, as shown in the figure, an overhead ground wire 1 having a horizontal angle θ between the left and right spans is secured to the tower top 2 of the steel tower via tension clamps 3 on the left and right, respectively, and the overhead ground wire 1 The center of the jumper portion 1a is fixed to the center of the top of the tower with a clamp fitting 11. A conventional tower top bypass device 5 for allowing self-propelled aircraft to pass through this steel tower section includes a bypass rail 5a arranged on the side of the tower top 2 and connected at both ends to the overhead ground wires 1 on both sides of the tower as a bypass support member. 5
It has a structure in which it is fixed to the tower top 2 side at b and 5c.

[Problems to be Solved by the Invention] With the conventional bypass device 5 in which the bypass rail 5a is fixedly provided as described above, it is difficult for the self-propelled aircraft to change direction at a sharp angle. In order to smoothly branch between the overhead ground wire 1 and the bypass rail 5Et and pass through the bypass device 5 smoothly, it is necessary to make the curvature of the bypass rail 5a sufficiently large in accordance with the horizontal angle. As a result, the length l of the bypass rail 5a becomes significantly longer, resulting in a disadvantage that the equipment becomes larger.

In addition, depending on the size of the horizontal angle, the bypass rail 5a is
In addition, the bypass support members 5b and 5c had to be designed, which was complicated.

Furthermore, it is necessary to provide the self-propelled machine with a slight curve traveling function, and the traveling drive Rn4 of the self-propelled machine is also somewhat complicated.

The present invention has been made to eliminate the above-mentioned conventional drawbacks, and it is possible to downsize the bypass device, and has the versatility of being able to accommodate various horizontal angles between left and right spans of overhead cables.
Furthermore, it is an object of the present invention to provide a tower top bypass device that allows even a self-propelled aircraft with only a straight-line traveling function to pass through.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a horizontal straight turn rail that is rotatable around a vertical axis installed on the top of a support tower, and one end of which is connected to an overhead cable. A bypass member is connected near the tension clamp, extends linearly in the extending direction of the overhead cable when viewed from the top, and is provided integrally with the tension clamp so that the other end reaches the radial position of the turn rail. This is a tower top bypass member for an overhead cable self-propelled aircraft.

[For fya] In the above configuration, first, the turn rail is rotated and one end thereof is connected to the bypass member on one span side where the self-propelled machine is located, and then the self-propelled machine is run on the bypass member. ,
Then transfer to the turn rail and stop at the center of the tower top of the turn rail. Now, when the turn rail is rotated and the other end of the turn rail is connected to the bypass member on the other span side, and the self-propelled machine is run again, the self-propelled machine passes through the turn rail and connects to the other bypass member. and then to the overhead cable in the other span. In this way, the self-propelled aircraft passes through the support tower section where the left and right spans of the overhead cable have a horizontal angle.

[Example 1] An example of the present invention will be described below with reference to FIGS. 1 to 9.

As shown in the side view of FIG. 1 and the plan view of FIG. The center of the jumper portion 1a of the overhead ground wire 1 is fixed to the center of the tower top portion 2 with a clamp fitting 4. Note that 6 is a tension fitting that connects the tension clamp 3 to the tower top 2. The above structure is the same as the conventional one, but in the embodiment of the present invention, a support 7 is installed at the center of the upper surface of the tower top 2, and this support 7
A circular pedestal 8 is fixed to the pedestal 8, and a horizontal linear turn rail 9 is rotatably housed in the pedestal 8 about a vertical shaft 10. Rollers 11 are provided on the lower surface of the turn rail 9 to ensure smooth rotation.

On the other hand, the tension clamp 3 has a lower end 12a fixed to a position near the tension clamp 3 on the overhead ground wire 1, and extends linearly in the extension direction of the overhead ground wire 1 when viewed from the top. A bypass member 12 whose portion 12b reaches a radial position of the turn rail 9 is integrally fixed via a support 13.

Furthermore, as shown in detail in FIGS. 3 and 4, the turn rail 9 hits the four stopper portions 9a of the turn rail 9.
A turn rail stopper 14 that defines the rotation ratio of the turn rail 9 and a locking device flIl that restrains the turn rail 9 from rotating backward are provided on a base 16 that is integrally fixed to the tip of the bypass member 12. The lock fifl 115 consists of a locking piece 17 having a tapered bulge fixed to the turn rail 9, and a chuck device 18 that chucks this locking piece 17. A pair of levers 21 rotatable around a supported fulcrum shaft 20, and the pair of levers 21 are held in a parallel state, and the levers 21
It consists of springs 22 and 23 that generate a repulsive force to return to the original parallel state when the lever 2 is opened.
A claw 21a is formed at the tip of the locking piece 17 to prevent the locking piece 17 from being removed.

Next, the operation when the self-propelled aircraft passes through the tower top bypass device will be described.

Now, as shown in FIG. 5, it is assumed that a self-propelled machine 24 such as an inspection robot is riding on the overhead ground wire 1 in the right span of the steel tower 2.

As shown in FIGS. 5 and 2, the turn rail 9 is connected at its right end side to the bypass member 12 on the right span side. In this case, the lock af1115 is in a state where the locking piece 17 on the turn rail 9 side is chucked, as will be described later! The turn rail 9 is restrained from rotating backwards.

When the self-propelled machine 24 runs here, the self-propelled machine 24 moves from the overhead ground wire 1 on the bypass member 12, transfers to the turn rail 9, and stops at the center of the turn rail 9 as shown in FIG. do.

Here, the turn rail 9 is rotated to the position of the bypass member 12 on the left span side, and the left end of the turn rail 9 and the bypass member 12 on the left span side are connected as shown in FIG. At this time, the turn rail 9 has its rotation limit defined by the turn rail stopper 14, and is restrained at that position by the lock mechanism 15 so as not to rotate backward.

Subsequently, when the self-propelled machine 24 is run, the self-propelled machine 24 moves on the turn rail 9, transfers to the bypass member 12,
Move onto the overhead ground wire 1 on the left span side. In this way, self-propelled 81
24 passes through a steel tower section where the left and right spans of the overhead cable have a horizontal angle.

The details of the operation of the lock fii 15 described above will be explained with reference to FIGS. 8 and 9. FIG. 8 shows the operation when locking the turn rail 9, and the turn rail 9 is When it further rotates and moves to the right in the figure, the tapered locking piece 17 comes into contact with the tapered surface of the claw 21a of the lever 21, and the lever 21 is moved against the spring 22, 23 as shown in figure (b). When the turn rail 9 is further moved by pushing it apart against the force, the locking piece 17 enters between the levers 21 as shown in FIG. In this way, the turn rail 9 is locked to prevent reverse rotation. The operation for unlocking the turn rail 9 is as shown in FIG. 9, by applying a force P for unlocking to the rear end of the lever 21 from the locked state shown in FIG. 9(A). , as shown in the same figure (b), the lever 21 opens up and down, the locking piece 17 can be moved, that is, the lock is released, and after the turn rail 9 rotates and moves to the left in the figure, the operating force P is applied. When released, the lever 21 returns to its original parallel state as shown in FIG.

In addition, although the above-mentioned example described an overhead ground wire, it is applicable not only to an overhead ground wire but as long as it is an overhead cable held at the top of a support tower with a tension clamp.

Moreover, the lock mechanism and stopper mechanism are not limited to those of the embodiment, and various methods can be adopted.

[Effects of the Invention] Since the present invention is configured as described above, the following effects are achieved.

A structure in which a linear turn rail rotates in accordance with the horizontal angle of the left and right spans of the overhead cable, and the turn rail and bypass member are linearly connected when viewed from the top, that is, a combination of straight rails when viewed from the top. ) Because it has a unique structure and has no curved parts, there is no need to install a sufficiently long bypass rail with a large curvature like in conventional fixed bypass devices.
The equipment can be sufficiently miniaturized.

Since the turn rail can be rotated to accommodate any horizontal angle between the left and right spans of the overhead cables, the bypass device of the same design can be used for towers with various horizontal angles, providing extremely high versatility.

Since a self-propelled machine only has the ability to travel in a straight line and is not required to travel around curves, the travel drive mechanism of the self-propelled machine can be simplified.

[Brief explanation of drawings]

1. L7i is a side view of a tower top bypass device showing one embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is an enlarged view of section A in FIG. 2, and FIG. 4 is an enlarged view of part A in FIG. ■-IV line sectional view, Figures 5, 6, and 7 are explanatory diagrams showing the operation when the self-propelled aircraft passes in the order of operation, Figures 8 (a), (b),
(c) is an explanatory diagram of the operation of the locking mechanism during lock operation, No. 9
Figures (a) and (b). (c) is an explanatory diagram of the operation of the locking mechanism when it is unlocked, part]
OrJ is a side view showing a conventional tower top bypass device. Rail stopper 5...Lock mechanism, running mechanism.

Claims (1)

[Scope of Claims] A tower top bypass device for an overhead cable self-propelled aircraft, which is provided on a support tower in which overhead cables in left and right spans having a horizontal angle are held at the top of the tower via tension clamps, the support tower comprising: A horizontal straight turn rail that can be rotated around a vertical axis is installed on the top of the tower, and one end is connected near the tension clamp of the overhead cable, and the turn rail is installed in a straight line in the direction of extension of the overhead cable when viewed from the top. 1. A tower top bypass device for an overhead cable self-propelled aircraft, comprising a bypass member integrally provided with a tension clamp extending so that the other end reaches a radial position of the turn rail.