JPH055802Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a safety cut-off rod for high-voltage power transmission towers, and more specifically, for maintenance, inspection, and repair near high-voltage power transmission overhead lines of high-voltage power transmission towers. A high-voltage power transmission tower that allows for easy, reliable, and strong installation of a hazard-prevention cutoff rod to the tower to prevent workers from touching high-voltage power lines during work. Regarding the danger prevention cutoff rod.

[Conventional technology]

As shown in FIG. 6, the high-voltage power transmission line is normally connected via an insulator 19 to the tip of the power transmission line support arm 2, which extends to the left and right from the upper part of the steel tower 1. Conventionally, when repairing, maintaining, or inspecting malfunctions of high-voltage power transmission equipment of this kind, one wire is separately provided on each of the triangular opposing frames 2a and 2b of the power transmission line support arm 2, as shown in FIG. It was hot. For this reason, there was an inconvenience that a short blocking rod 3 could not be used when the distance between the opposing frame members 2a and 2b was wide depending on the size of the steel tower, and the length could not be adjusted to an appropriate length. Furthermore, since the rod 3 was installed by supporting it at a single point in the center, there was a problem with the installation strength.

Therefore, nowadays, as shown in FIG. 6, a telescopic blocking rod 3 whose length can be freely adjusted is used to connect the opposing frames 2a and 2b with the large diameter pipe 4 and the small diameter pipe 5.
It has been proposed to attach them via fixing fittings 7 and 8 between them.

[Problem that the invention attempts to solve]

However, in the improved safety cutoff rod for high-voltage power transmission towers shown in FIG. In each of the opposing frame members to be formed, the large-diameter pipe 4 and the small-diameter pipe 5 are installed and fixed with bolts and nuts using tools, so
The range of movement of the worker is widened, which poses a risk of putting the worker in danger, and since a large number of tools are required, there is a high risk of dropping the tools, resulting in problems in workability.

Furthermore, since the large-diameter pipe 4 and the small-diameter pipe 5 are pinned together and are configured to only allow rotation in the horizontal direction, it is difficult to move to the tip of the arm during work, and There are problems such as the pipes being easy to separate.

The present invention was devised to address the above-mentioned problems, and its purpose is to provide a hazard prevention method for high-voltage power transmission towers that can be installed reliably and firmly with simple installation work. The purpose is to provide a blocking bar.

[Means for solving problems]

And, as a means to achieve the above object, the danger prevention cutoff rod of the high voltage transmission tower of the present invention is as follows:
A danger-prevention cutoff rod installed on a power transmission line support arm of a high-voltage power transmission tower, the cutoff rod is formed to be expandable and contractible by sliding in the axial direction of a large-diameter pipe and a small-diameter pipe, and has a length that can be expanded and contracted. A lock for fixing the transmission line support arm at a desired position is provided across the tip of the large diameter pipe and the area near the fitting part of the small diameter pipe, and a lock is provided between the two opposing frame members of the power transmission line support arm. The rear end of the large-diameter pipe of the cutoff rod is fixed to the upper end of a fixing fitting attached to one of the frames, so that the blocking rod can freely rotate horizontally and vertically around the fixing fitting; Furthermore, a fixing fitting for fixing the tip of the small diameter pipe is provided at the upper end of the fixing fitting attached to the other frame material among the frame members, and the fixing fitting includes a holding member provided with a cutoff bar holding groove, and the holding member. The metal fitting has a cut-off rod flip-up holding member which is pivotably supported by the cut-off rod, flips up and rotates upon contact with the cut-off rod, and holds the cut-off rod by the cut-off rod holding groove. .

The structure of the lock for fixing the telescopic length of the large-diameter pipe and the small-diameter pipe by axial fitting and sliding at a desired position is as follows.

In other words, the large-diameter ring for fitting the tip of the large-diameter pipe and the small-diameter ring for penetrating the small-diameter pipe are communicated with each other via the stepped portion, and the outer circumferential diameter of the small-diameter ring side of the cylinder is reduced to form a male fitting cylinder. The small-diameter ring for penetrating the pipe is formed into an eccentric ring to obtain a fixed locking member, and the large-diameter female ring for receiving the male fitting cylinder and the small-diameter ring for penetrating the small-diameter pipe are connected via a stepped portion. The small diameter ring for penetration is formed into an eccentric ring to obtain a fixed lock member, and when both of the above fixed lock members are fitted together, both small diameter rings are connected to each other. A small-diameter pipe is inserted when the pipe is in a perfect circle, and then one of the fixed lock members is rotated to be crimped onto the small-diameter pipe, and then both fixed lock members are fixed together with a screw. good.

[Effect]

Based on the above-mentioned structure, the danger-prevention cutoff rod for high-voltage power transmission towers of the present invention is not only telescopic and can be adjusted steplessly in length, but also can be used at the tip of large-diameter pipes. The length of the rod can be appropriately fixed to a desired length by a length adjustment lock for fixing the retractable length at a desired position, which is provided across the area near the fitting part of the rod and the small diameter pipe. Moreover, since the blocking rod can be rotated horizontally as well as vertically and vertically around one of the fixing fittings,
This function allows the worker to adjust the length of the transmission line support arm while remaining on one of the frame members that make up the transmission line support arm without having to lean forward in the direction of the overhead wire, and allows the cutoff bar to be moved horizontally and vertically. The tip part of the small diameter pipe can be fixed to the other fixing fitting in one-touch manner while

〔Example〕

Hereinafter, embodiments embodying the present invention will be described with reference to the drawings.

Here, Fig. 1 to Fig. 4 show one embodiment of the present invention, Fig. 1 is a front view of the blocking rod attached to the L-shaped frame member of the steel tower, and Fig. 2 a is an enlarged view of the fixing lock. 2b is an exploded sectional view of FIG. 2a, FIG. 3a is an enlarged front view of one of the fixing fittings, and FIG. 3b is an exploded sectional view of FIG.
Figure 3a is a side view seen from the left side, Figure 4a is an enlarged front view of the other fixture, Figure 4b is Figure 4a.
FIG. Note that the same reference numerals are given to the same corresponding parts as in the conventional example diagram.

The danger prevention cutoff rod of the high voltage power transmission tower of this embodiment is roughly divided into a cutoff rod 3, a fixing lock 6, and two fixing fittings 7 and 8.

The blocking rod 3 consists of a metal (aluminum) large-diameter pipe 4 and a small-diameter pipe 5, and caps 20 and 21 are provided at both ends. Then, the small diameter pipe 5 is slidably fitted in the axial direction within the large diameter pipe 4, whereby the cutoff rod 3 is formed as a telescopic rod, and its length can be adjusted via the fixing lock 6. It is made in

The fixing lock 6 is made of hard synthetic resin and is provided across the tip 4' of the large-diameter pipe 4 and the part 5' near the fitting part of the small-diameter pipe 5, and includes one fixing lock member 6a, It consists of the other fixed lock member 6b.

One fixed lock member 6a is formed in a cylindrical body 13 in which a large diameter ring 10 for fitting the tip of the large diameter pipe 4 and a small diameter ring 11 for penetrating the small diameter pipe are communicated via a step 12, and Small diameter ring 11 of cylindrical body 13
The fitting male cylinder 14 is formed by reducing the outer circumferential diameter of the portion. The axes of the large-diameter ring 10 for fitting the tip of the male fitting cylinder 14 and the small-diameter ring 11 for penetrating the small-diameter pipe are slightly shifted from each other, and as explained in FIG. The wall thickness is not constant all around the circumference, and there is a relationship of L>L', so that the small diameter ring 11 for penetration is formed as an eccentric ring. Further, a ring-shaped groove 22 is carved on the outer peripheral surface of the male fitting cylinder 14, and a screw insertion hole 23 is bored in the cylinder body of the large-diameter fitting ring 10 portion.

The other fixed lock member 6b has a large diameter female ring 15 that receives the fitting male cylinder 14 of the fixed lock member 6a.
and a small-diameter ring 16 for penetrating the small-diameter pipe 5 are formed in a cylindrical body 18 that communicates with each other via a step 17,
In addition, the axes of the cylindrical body 18, the large-diameter female ring 15, and the small-diameter penetrating ring 16 are slightly deviated from each other,
The wall thickness of the cylinder is not constant all around the circumference like the fitting male cylinder 14 part, but has a relationship of M>M', and the small diameter ring 16 for penetration is formed as an eccentric ring, and the large diameter ring 16 is formed as an eccentric ring. A screw insertion hole 23' is bored in the female ring 15 portion.

One of the two fixing metal fittings 7 and 8
is one L-shaped frame member 2 of the triangular opposing frame members 2a and 2b of the power transmission line support arm 2 of the high-voltage power transmission tower 1.
It is firmly attached to a by bolts, nuts, a holding plate 24, a locking pawl 25, etc. A flat plate 26 is bent at the upper end of the fixing fitting 7, and an L-shaped plate 26 is connected to the flat plate 26 via bolts and nuts 27.
8 is provided so as to be freely rotatable in the horizontal direction around the bolt and nut 27 portion, and is further provided on the L-shaped plate body 28 through the bolt and nut 29 to be rotatable in the vertical direction around the bolt and nut 29 portion. A fixing member 30 for gripping the moving large diameter pipe 4 is provided.

Similarly to the fixing fitting 7, the other fixing fitting 8 is the other L-shaped frame member 2 of the triangular opposing frames 2a and 2b of the power transmission line support arm 2 of the high-voltage power transmission tower 1.
It is firmly attached to b with bolts, nuts, a holding plate 24, a locking pawl 25, etc. The upper end of the fixture 8 is also bent into a flat plate 31, and further,
A one-touch type fixing fitting 9 is provided on the flat plate 31 to fix the tip portion of the small diameter pipe 5.
The one-touch type fixing fitting 9 is formed of an L-shaped member having a flat plate 32 that is engaged with a flat plate 31 at the lower end using bolts and nuts, and has a recess 33 at the upper end.
is formed, and a groove 34 provided at the tip of the small diameter pipe 5 is fitted into the recess 33 in a biting manner. That is, the blocking rod holding groove 33
A holding member 9a equipped with a holding member 9a;
In addition, it is configured as a metal fitting having a cutoff rod flip-up holding member 9b that holds the cutoff rod 5 through the cutoff rod holding groove 33.

Next, the operation of the danger prevention cutoff rod of the high-voltage power transmission tower of this embodiment will be described.

The danger prevention interrupting rod of the high-voltage power transmission tower of this embodiment is constructed by integrating the fixing fitting 7 and the L-shaped plate 28 on the ground in advance by loosely tightening them with bolts and nuts. 9 is
Bolts and nuts may be tightly tightened and integrated firmly on the ground. Further, the blocking rod 3 is used to insert the small diameter pipe 5 when both the small diameter rings 11 and 16 are in a perfect circle state when both the fixed lock members 6a and 6b are fitted together. is inserted into the large-diameter pipe 4 and fixed to a short length using the eccentric ring of the fixing lock 6. Then, a worker climbs up the steel tower 1 holding these, and, to explain using the conventional example shown in FIG. Fixing fittings 7 and 8 are respectively attached, a fixing member 30 for holding the large diameter pipe 4 is attached to the L-shaped plate 28, and the end of the large diameter pipe 4 is fixed by loosely tightening the bolt and nut 29. Then, the fixing lock 6 is loosened and the small-diameter pipe 5 is pulled out so that the groove 32 provided at the tip of the small-diameter pipe 5 is fitted into the recess 33 of the one-touch type fixing fitting 9 in a biting state. At this time, since the bolts and nuts 28 and 29 of the fixing fittings are loosely tightened, the shutoff rod 3 itself can be horizontally rotated and moved up and down, and the length of the small diameter pipe 5 can be easily adjusted while the small diameter The tip of the pipe 5 can be fitted into the one-touch fixing fitting 9 and fixed without wobbling.

After the above-mentioned work is completed, turn the fixing lock member 6b of the fixing lock 6 by hand, press and fix it at the eccentric part, and then tighten the other bolts and nuts 28, 29.
are also firmly tightened, whereby the blocking rod 3 is firmly fixed between the opposing frame members 2a and 2b.

Therefore, when performing maintenance, inspection, or repair work on the steel tower, the safety of the workers is protected because the cutoff rod 3 cuts off the wires before approaching the high-voltage wires.

It should be noted that the present invention is not limited to the embodiments described above, and it is clear that modifications can be made without changing the gist of the present invention. Incidentally, although the fixing lock member 6b of the fixing lock 6 has been described with the configuration shown in FIG. 4, it is not limited to this configuration. For example, as shown in FIG. In addition, it may be configured to include a cam that can prevent the rod from disengaging.
In other words, any configuration may be used as long as the rod can be fixed in one-touch manner. Alternatively, it may be configured such that it simply has a hole into which a small-diameter pipe is inserted (inserted). In this case, the fixing state of the large-diameter pipe is slightly loosened, and the small-diameter pipe is fitted into the hole by pushing the rod to fix it in one-touch manner.

[Effect of idea]

As is clear from the above description, according to the danger prevention cutoff rod for high-voltage power transmission towers of the present invention, the cutoff rod can be moved horizontally, vertically, etc. using one end of the cutoff rod as the base, and can be freely adjusted with one touch. Since the tip of the blocking rod can be fixed, the installation work is easy, and the effectiveness is doubled, especially when working on dangerous steel towers with narrow footing and high places.

Further, the expansion and contraction length adjustment of the blocking rod itself can be easily and reliably fixed using a fixing lock using an eccentric ring.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention; Figure 1 is a front view of the blocking rod attached to the L-shaped frame member of the steel tower; Figure 2a is an enlarged sectional view of the fixing lock; Figure 2b is an exploded sectional view of Figure 2a, Figure 3a is an enlarged front view of one of the fixing fittings, Figure 3b is Figure 3a
Fig. 4a is an enlarged front view of the other fixing bracket, Fig. 4b is a side view of Fig. 4a seen from the right side, Fig. 5 is the other fixing bracket. FIG. 6 is a schematic perspective view showing an attached state of the conventional example, and FIG. 7 is a front view showing another conventional example. 1...High voltage transmission tower, 2...Power line support arm, 3...Danger prevention cutoff rod, 4...Large diameter pipe, 5...Small diameter pipe, 6...Fixing the telescopic length at a desired position Lock for, 6a, 6b...
Fixed lock member, 7, 8...Fixing metal fitting, 9...One-touch type fixing metal fitting, 9a...Retaining member, 9b
. . . Blocking rod flip-up holding member, 10 . . . Large-diameter ring for fitting the tip of a large-diameter pipe, 11 .
...Male cylinder for fitting, 15...Large diameter female ring for receiving male cylinder for fitting, 17...Step part, 18...Cylinder body, 19
……screw.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A safety cut-off rod installed on the power transmission line support arm of a high-voltage transmission tower, which is expanded and contracted by the axial fitting and sliding movement of a large-diameter pipe and a small-diameter pipe. A lock is formed to be freely formed and to fix the extendable length at a desired position, and a lock is provided spanning the tip of the large-diameter pipe and a portion near the fitting part of the small-diameter pipe; The rear end of the large-diameter pipe of the above-mentioned shutoff rod is fixed to a fixing bracket attached to one of the two opposing frame members of the arm, so that the shutoff rod can rotate horizontally and vertically about the fixing bracket. It is formed to be freely rotatable in the vertical direction, and is further provided with a fixing fitting for fixing the tip portion of the small diameter pipe to a fixing fitting attached to the other of the frame members, and the fixing fitting is provided with a blocking rod holding groove. a holding member; and a cutoff rod flip-up holding member that is pivotally supported by the holding member, flips up and rotates upon contact with the cutoff rod, and holds the cutoff rod by the cutoff rod holding groove. A danger prevention interrupting rod for a high-voltage power transmission tower, characterized in that it is made of a metal fitting. (2) The large diameter ring for fitting the tip of the large diameter pipe and the small diameter ring for penetrating the small diameter pipe are connected to each other via a step, and the outer circumferential diameter of the small diameter ring side of the cylinder body is reduced to form a male cylinder for fitting. , and the small diameter ring for penetration is
A fixed locking member is obtained by forming an eccentric ring, and a large-diameter female ring for receiving the male fitting cylinder and a small-diameter ring for penetrating a small-diameter pipe form a cylindrical body that communicates with each other via a stepped portion, and , the small diameter ring for penetration is
A fixed lock member is obtained by forming an eccentric ring, and when both of the above fixed lock members are fitted together and both small diameter rings are in a perfect circle state, a small diameter pipe is inserted, and then one of the small diameter pipes is inserted. 2. The danger prevention cutoff rod for a high-voltage power transmission line tower according to claim 1, wherein the fixed lock member is rotated and crimped onto the small diameter pipe so that both fixed lock members are fixedly integrated.