JPH02136004A - Structure of passage at top of pylon for aerial cable mobile machine - Google Patents

Abstract

PURPOSE:To miniaturize the size of passage and to facilitate the work by constituting a mobile machine passage at the top section of a pylon by a reinforced jumper section and a track member connected to this jumper section. CONSTITUTION:A jumper section 1a of an overhead earth wire 1 is reinforced by a wear plate IC. The center of the jumper section 1a and that of the wear plate 10 are integrally coupled with a center clamp 13 in the upper part of a supporting post 11 provided in the center of the upside of a pylon top section 3a and supported in heaved state. At both ends of the wear plate 10 the jumper section 1a and the wear plate 10 are also integrally coupled with end clamps 13. Track members 14 are provided to strain clamps 2. A mobile machine travels from one end of the overhead earth wire 1 to the other along a rail section 14a and the jumper section 1a. Consequently, the whole length may be a little longer or so than the distance between both outside ends of strain clamp 3, right and left. Since the jumper line can be used as it is, it is easy to apply to the anchor section of the pylon for the existing overhead earth wire.

Description

Detailed Description of the Invention [Industrial Field of Application] This invention provides an overhead cable self-propelled machine that runs on overhead cables for inspection of overhead cables, etc., by applying tension clamps to the left and right overhead cables. This invention relates to a tower top passage structure for an overhead cable self-propelled aircraft for passing a support tower section held at the tower top section via a tower.

[Prior Art] Conventionally, as shown in FIG. 6, as a structure for retaining an overhead cable consisting of an overhead ground wire to the top of a steel tower, an overhead cable 1 in the left and right spans is supported by a steel tower, etc. through tension clamps 2, respectively. The structure is such that it is held at the top (tower top) 3a of the tower 3 and the center of the jumper part 1a between the tension clamps 2 and 2 of the overhead cable 1 is fixed to the center of the upper surface of the tower top by a clamp fitting 4. Are known. In addition, what is indicated by the reference numeral ``arm'' is a tension-resistance fitting that connects the tension-resistance clamp 2 to the tower top portion 3a.

Incidentally, in recent years, an inspection robot equipped with a television camera has been used to run over overhead cables with its own blade to monitor minute damage on the outside of the overhead cable. (hereinafter simply referred to as self-propelled aircraft) cannot directly pass through the top of a tower, such as a steel tower, where the overhead cable 1 is held down by the tension clamp 2 as described above. In order to pass, as shown in Figure 7 of the plan view, a self-propelled +
Both ends of the bypass member 7, which becomes the rail of fi 6, are connected to the overhead cable 1 of the left and right spans by going around the tower top 3a,
The middle part of the bypass member 7 is connected to the tower top part 3 using the bypass support material 8.
Installing a fixed bypass device in a. In addition, in FIG. 7, illustration of the jumper portion 1a is omitted.

[Problems to be Solved by the Invention] In the above-mentioned conventional bypass device, the bypass member 7, which becomes the rail on which the self-propelled vS 6 runs, is installed around the tower top 3a, so both ends are connected to the overhead cable 1. The length of the bypass member 7 to be connected becomes extremely long, and in order to support this long bypass member 7 so as to sufficiently withstand the load of the self-propelled machine, the bypass support member 8 also needs to have a sufficiently large strength, and the equipment is required to be strong enough. It had the disadvantage of being large. If we try to apply such large-scale equipment to the tower-top retaining section of existing overhead cables, the construction will be extensive.
There was also the problem of high construction costs.

In addition, in contrast to the bypass member 7 shown in the illustrated example in which the side of the tower top 3a is routed around, there is also a bypass member that is routed around the upper part of the tower top 3a, and in this case, it is possible to make it slightly smaller. However, since a bypass member is provided separately, sufficient miniaturization cannot be achieved.

The present invention was made in order to eliminate the above-mentioned conventional drawbacks, and provides a tower top passage structure for overhead cable self-propelled aircraft that can be made sufficiently small in size and can be easily installed on existing ones. The purpose is to provide.

[Means for Solving the Problems] The present invention, which solves the above problems, provides a support member in which the jumper portion of the overhead cable between WA tension clamps is reinforced with a reinforcing material, and the reinforced jumper portion is provided to protrude from the top surface of the tower. Above the tension clamp which is supported in a lifted state and holds the overhead cable in place, a track is connected at one end to the tension clamp section 11 of the overhead cable and to the jumper section near the tension clamp. This is a tower top passage structure for an imaginary Gouple self-propelled machine equipped with members.

According to a second aspect of the present invention, the receiving plate for receiving the lower surface of the jumper section is used as a reinforcing material for the jumper section.

According to a third aspect of the present invention, the reinforcing wire attached to the jumper portion is used as a reinforcing material for the jumper portion.

According to a fourth aspect of the present invention, an armor rod wrapped around the jumper portion serves as a reinforcing material for the jumper portion.

According to a fifth aspect of the present invention, a telescopic support post that can be elastically expanded and contracted in the vertical direction is used as a support member that supports the reinforced jumper section.

According to a sixth aspect of the present invention, the structure of the track member is such that it has a generally rectangular frame-shaped cross section surrounding the tension clamp, and has a rail section on the upper surface of which the self-propelled machine runs.

[For 1 Ya] In the above configuration, the self-propelled machine on the overhead cable in one span climbs onto the track member from the overhead cable, moves on this track member, and then is reinforced and supported. It moves over a jumper section supported in a lifted state by a member, and further passes through the other track member to reach the overhead cable in the other span. The self-propelled aircraft thus passes through the overhead cable tower tie-down.

[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 5.

FIG. 1 shows the first embodiment. In the figure, 1 is an overhead ground wire as an overhead cable, and 2 is an overhead ground wire 1 that is held at the top (tower top) 3 EL of a steel tower 3 as a support tower. The tension clamp 5 is a tension fitting for connecting the tension clamp 2 to the tower top 3a, and these are the same as in the conventional example shown in FIG.

In this embodiment, the jumper portion 1a of the overhead ground wire 1 is supported and reinforced by the receiving plate 10, and the center of the jumper portion 1a is supported by the central clamp 12 on the top of the support post 11 installed at the center of the upper surface of the tower top portion 3a. The center of the plate 10 is joined together to support them in a lifted state, and the jumper part 1a and the receiving plate 10 are also tied together by end clamps 13 at both ends of the receiving plate 1o. A track member 14 is installed in the tension clamp 2 portion.

As shown in an enlarged view in FIG. 2, this track member 14 has a generally rectangular frame-shaped cross section surrounding the tension clamp 2, and has a section on its upper surface near the tension clamp 2 with one end of the overhead ground wire 1. It is provided with a rail part 14a for self-propelled machine running, the other end of which is fixedly connected to a part of the jumper part 1a near the tension clamp 2.

To explain the operation when a self-propelled aircraft passes the tower top retaining part of the overhead ground wire 1 configured as described above, the self-propelled aircraft that has moved on the overhead ground wire 1 in one span will As seen from above, it moves linearly as it is, climbs onto the rail portion 14a of the track member 14 from the overhead ground wire 1, continues to move on this tall portion 111εt, and then moves on the reinforced jumper portion IEt, Furthermore, it reaches the overhead ground wire 1 of the other span via the rail portion 14Et of the other track member 14. In this way, the self-propelled aircraft passes through the tower top retaining section of the overhead ground wire 1 without any hindrance. Note that the track member 1 surrounding the tension clamp 2
The rectangular frame portion 14b of No. 4 is the original side portion of the self-propelled machine, which is roughly U-shaped when viewed from the front, when the running wheels 6a of the self-propelled machine 6 shown by broken lines in FIG. 2 run on the rail portion 14εt. 6b serves to prevent interference with the uneven side surface of the tension clamp 2.

In the tower top passage structure described above, the self-propelled aircraft passage is constituted by the reinforced jumper part and the rail part of the track member provided above the tension clamp, so the total length of the passage is The distance between the two ends of the tension clamp 2 is only slightly longer than that of the tension clamp 2, and the distance is significantly shorter than that of the conventional bypass member type.

Furthermore, the members for supporting the part on which the self-propelled machine travels are much simpler than in the past, and the equipment is significantly smaller and lighter.

In addition, for construction, it is only necessary to reinforce the jumper part 1a with the receiving plate 10, support it with the support post 11, and install the track member 14, so the existing jumper wire can be used as is, and the existing tension clamp can be used. It does not require modification or replacement, and is extremely easy to apply to existing overhead ground wire tower retaining sections.

FIG. 3 shows a second embodiment. In this embodiment, the overhead ground wire 1
A reinforcing wire 2o is attached to the lower side of the jumper section 1a, and a central clamp 22 at the top of a height-adjustable post 21 installed at the center of the upper surface of the tower top section 3a connects the center of the jumper section 1a and the center of the reinforcing wire 2o. The jumper portion 1a and the reinforcing wire 2o are tied together to support them in a lifted state, and the jumper portion 1a and the reinforcing wire 2o are also tied together by end clamps 23 at both ends of the reinforcing wire 20. Other points are similar to the first embodiment shown in FIGS. 1 and 2.

FIG. 4 shows a third embodiment. In this embodiment, as shown in the enlarged cross-sectional view of FIG. It is supported in a lifted state by being held by a central clamp 32 at the top of a telescoping support post 31 that is installed at the center of the top surface and can be elastically expanded and contracted in the vertical direction. This telescopic support member 31 has a lower cylindrical member 31b having a built-in spring 31a.
the upper slide member 31. This is a structure in which c is inserted.

In this embodiment, the reinforced jumper portion 1a is supported by an elastically expandable support post 31.

The jumper section IEt can follow the movement of the overhead ground wire 1 between the left and right spans of the tower section due to wind and changes in sag.
This serves to prevent stress from concentrating on the overhead ground wire 1 and its jumper portion 1a.

In the first and second embodiments, it is also possible to similarly follow the movement of the overhead ground wire by using a telescoping support post that can be elastically expanded and contracted in the vertical direction as a support post.

Note that the reinforcing means for the jumper portion 1=t is not limited to the above-mentioned embodiments, and various methods are possible.

Further, the track member is not limited to the tR structure of the above embodiment. For example, it may not have a shape that surrounds the tension clamp 2,
The structure may include only a rail portion that passes above the tension clamp 2 and is connected to the jumper portion 1a.

Furthermore, the present invention is applicable not only to an overhead ground wire but also to any overhead cable that has a jumper section and is tied to the top of a tower.

[Efficacy of invention fj! , ] Since the present invention is configured as described above, it has the following effects.

Since the reinforced jumper section and the track member connected to this jumper section constitute the self-propelled aircraft passageway at the top of the tower, the total length of the passageway is significantly shorter than that of the conventional bypass member method. Therefore, the members for supporting the running section on which the self-propelled machine runs can be simpler than those of the past, and the equipment can be significantly reduced in size and weight, and construction is also easier.

In addition, since it is only necessary to reinforce the jumper part and remove the track member and shorten it by one inch, the existing jumper wire can be used as is.
In addition, there is no need to modify or replace existing tension clamps, and in combination with the above-mentioned reduction in size and weight, it is extremely easy to apply to existing steel tower sections.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a first embodiment of the overhead gable tower top passage for self-propelled aircraft according to the present invention, Fig. 2 [] is an enlarged sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is A side view showing the second embodiment, No. 11 IIJ is a side view showing the third embodiment, Fig. 5 is an enlarged sectional view taken along the line ■-V in Fig. 4, and Fig. 6 is IIY.
FIG. 7 is a side view showing a Song Dynasty overhead cable tower top retaining section, and a plan view showing a conventional tower top passage structure for an aerial cable self-propelled rock. 1. Overhead ground wire (overhead cable), 1a... Jumper part, 2... Tension clamp, 3... Steel tower (support tower), 3
a... Tower top, 6... Self-propelled machine, 10... Receiving plate (
Reinforcing material), 11.21... Supporting post (supporting member),
14... Track member, 1.4 =t... Rail part, 2
0... Reinforcement wire (reinforcement material), 30... Armor rod (reinforcement material) 31... Telescopic support post (support member).

Claims (1)

[Scope of Claims] 1. An aerial structure in which the overhead cables of the left and right spans are each held at the top of the tower via tension clamps, and the jumper section of the overhead cable between the tension clamps is arranged above the tower top. In the cable tower top retaining structure, the jumper section is reinforced with a reinforcing material, and the reinforced jumper section is supported in a lifted state by a support member protruding from the top surface of the tower, and above the tension clamp,
A tower top passage structure for an overhead cable self-propelled machine, characterized in that a track member is provided, one end of which is connected to a portion near the tension clamp of an overhead cable, and the other end connected to a portion of a jumper portion near the tension clamp. 2. The tower top passage structure for an overhead cable self-propelled aircraft according to claim 1, wherein the reinforcing member is a receiving plate that receives the lower surface of the jumper part. 3. The tower top passage structure for an overhead cable self-propelled aircraft according to claim 1, wherein the reinforcing material is a reinforcing wire attached to a jumper section. 4. The tower top passage structure for an overhead cable self-propelled aircraft according to claim 1, wherein the reinforcing material is an armor rod wrapped around a jumper portion. 5. The free-running aerial cable according to claim 1, 2, 3, or 4, wherein the support member is a telescopic support post that is installed at the center of the upper surface of the tower top and can be elastically expanded and contracted in the vertical direction. Aircraft tower top passage structure. 6. The track member according to claim 1, 2, 3, 4, or 5, wherein the track member has a generally rectangular frame-shaped cross section surrounding the tension clamp, and has a rail portion on the upper surface of which the self-propelled machine runs. Tower top passage structure for overhead cable self-propelled aircraft.