JPH0457977B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a work rod used when performing live line work such as cleaning insulators on power transmission line towers and detecting defective insulators.

(Prior technology) Live line work such as cleaning insulators on power transmission line towers and detecting defective insulators involves installing a cleaning device, defective insulator detector, etc. at the tip of a long working rod made of electrically insulating material. The work equipment is installed, the worker holds the rear end of the work rod, touches the work equipment against the insulator, and operates the work rod, but the distance from the worker's position on the tower to the work position is Since the distance is not constant, the length of the working rod must be changed appropriately depending on the distance.

(Problem to be Solved by the Invention) Conventionally, the length of the working rod can be changed by forming the working rod by connecting several short rods and increasing or decreasing the number of connected rods, or by changing the length of the working rod with different lengths. There were methods such as preparing a variety of equipment and replacing them as appropriate, or having the worker move and change the working position, but both methods were complicated and unsafe to perform on steel towers with poor footing. There were problems with workability.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the conventional means described above and to provide a working rod for working on live power lines that is easy to use at work sites with poor footing, such as on top of power transmission towers.

(Means for Solving the Problems) In the present invention, a plurality of short hollow rods 1a, 1b, 1c whose diameters are gradually reduced are inserted and connected via a tubular stopper 3. And this stopper 3
The insertion part 3a is tapered from the proximal end A to the distal end B, and the grip part 3b is connected to the proximal end A of the insertion part 3a. It is formed by partially cutting a cylindrical body along its longitudinal direction so that the side shape becomes tapered from the base end A to the distal end B, and from the grip part 3b to the insertion part 3a. An elastic expansion/contraction cut groove 3c is formed across the base end portion (A). And these plural short rods 1a, 1b,
Of the short rods 1b and 1c, which have a relatively small diameter, the retaining material 3 is loosely fitted to the short rods 1b and 1c, and the retaining material 3 is attached to
c is forcibly inserted into the short rods 1a, 1b, which have a relatively larger diameter than the short rods 1b, 1c to which they are inserted and connected, from their tip portions B.

(Function) According to the above configuration, the stopper 3 loosely fitted in the connecting portions of the short rods 1a, 1b, 1c is transferred from the relatively small diameter short rods 1b, 1c to the relatively large diameter short rods 1a, 1b.
Forcibly insert the large diameter short rods 1a and 1b into the
By pulling out the short rods 1a, 1b, 1
The overall length can be easily adjusted by sliding the parts c against each other, and it can also be firmly fixed at the desired length.

Embodiment 1 Hereinafter, embodiments of the present invention will be described with reference to the drawings, taking as an example an application to a work rod for cleaning insulators.

FIG. 1 is a side view of the working rod in its shortened state, and FIG. 2 is a side view of it in its extended state. The working rods 1 are three short rods 1 that are tapered rods whose diameter gradually decreases.
Consists of a, 1b, 1c, large diameter hollow short rod 1a
A short hollow rod 1b with a medium diameter is slidably inserted into the short rod 1b, and a short rod 1c with a small diameter is slidably inserted into the short hollow rod 1b. Device 2 is attached.

Reference numeral 3 denotes a tubular retaining material that is slidably and loosely fitted to the relatively small diameter short rods 1b, 1c among the plurality of short rods 1a, 1b, 1c, and is made of elastic material such as vinyl chloride resin. It is made of a material, and its detailed shape will be explained below with reference to FIGS. 3 and 4.

As shown in FIG. 4, the retaining member 3 has a side surface shape tapered from the proximal end A to the distal end B, and is connected to the tapered insertion portion 3a and the proximal end A of the insertion portion 3a. The insertion portion 3a has a short cylindrical grip portion 3b, and the cross-sectional area of the insertion portion 3a gradually increases from the distal end B to the proximal end A (handle portion 3b side). In the figure, a is the cut surface. Also, the grip part 3b
An elastic expansion/contraction groove 3c is formed extending from the insertion portion 3a to the proximal end portion A of the insertion portion 3a.

The insertion part 3a is formed by partially cutting out approximately half of the cylindrical body in a tapered shape along its longitudinal direction. This makes it easy to insert it inside 1a and 1b. Further, the outer peripheral surface of the grip portion 3b is provided with knurls to prevent slipping.

As mentioned above, each short rod 1b, 1c is a tapered rod and has a tapered shape, but each short rod 1b, 1c
Corresponding to the change in the outer diameter of the stopper member 3, the stopper member 3 expands and contracts due to its own elasticity and the action of the grooves 3c, and slides into contact with each of the short rods 1b and 1c with an appropriate frictional force. The retaining material 3 loosely fitted to the relatively small diameter short rods 1b, 1c,
By forcibly inserting these short rods 1b, 1c into relatively large diameter short rods 1a, 1b, the short rods 1a, 1b and short rods 1b, 1c are inserted and connected to each other, and are also forcibly inserted. By pulling out the stopper 3 toward the relatively small diameter short rods 1b, 1c, these short rods 1a, 1b, 1c become slidable relative to each other.

The working rod 1 has the above-mentioned configuration, and when cleaning the insulator, the working rod 1 is shortened as shown in Fig. 1 and pulled up onto the steel tower, and each short rod 1b, 1c is
is pulled out from each short rod 1a, 1b and stretched to an appropriate length, and each stopper 3 is forcibly inserted between each short rod 1a, 1b and 1b, 1c.

Here, the cross-sectional area of the insertion part 3a of each retaining member 3 gradually increases from the distal end B to the proximal end A, so that it is forcibly inserted between the short rods 1b and 1c due to its wedge action. Thus, each short rod 1b, 1c is firmly connected by sliding friction force.

After adjusting the working rod 1 to the desired length in this way, the worker holds the rear end of the working rod 1,
The cleaning device 2 on the tip side is brought into contact with the insulator 4 to clean the insulator 4 (see FIG. 5).

Next, when you want to change the length of the working rod 1, hold the grip part 3b of the stopper 3 and pull the stopper 3 toward the relatively small diameter short rods 1b, 1c.
b, 1c may be adjusted to the desired length by sliding them, and the stopper 3 may be forcibly inserted into the comparatively large diameter short rods 1a, 1b again.

After the cleaning work is completed in this way, when moving to the next work area or descending from the tower to the ground,
For convenience of transportation, the working rod 1 is again shortened as shown in FIG.

As described above, the present working rod 1 can be adjusted to the desired length by pulling out each short rod by an arbitrary length and connecting it easily and firmly with the stopper 3, thereby achieving sufficient work efficiency and work results. I can give it to you.

Embodiment 2 FIG. 6 shows another embodiment of the present invention, in which the stopper 6 also consists of an insertion part 6a and a grip part 6b, but the insertion part 6a further has a bifurcated branch part 6.
It is branched into a ₁ and 6a ₂ . The stopper 6 is also formed by partially cutting out a cylindrical body in the longitudinal direction, and its side surface is tapered from the proximal end A to the distal end B. a is the resection surface,
6c is a kerf. The handling and effects of the main stopper 6 are the same as those of the first embodiment, and its wedge action firmly connects the short rods to each other.

The present invention can further be modified in various ways, including
For example, in each of the above embodiments, each working rod 1 is formed by connecting three short rods 1a, 1b, 1c, but the number of short rods is not limited and may be any number. Alternatively, a defective insulator detector may be attached to the tip of the working rod 1 instead of the washer 2.

(Effects of the Invention) According to the present invention, the length of the working rod can be easily adjusted to a desired length, and it is extremely easy to use, and it is possible to safely perform prescribed work even on a steel tower with poor footing. can be carried out.

[Brief explanation of drawings]

The figure shows an embodiment of the present invention.
The figure is a side view of the working rod in its shortened state, Figure 2 is a side view of the working rod in its extended state, Figures 3 and 4 are a plan view of the main part and a side view of the main part, respectively, and Figure 5 is the one in use. The middle side view, FIG. 6, is a side view of another embodiment of the present invention. 1...Working rod, 1a, 1b, 1c...Short rod,
3, 6...Fixing material, 3a, 6a...Insertion part, 3b,
6b...grip part, 3c, 6c...cut groove, a...
Base end, b... distal end.

Claims (1)

[Claims] 1 A plurality of short hollow rods 1a, 1b, 1c formed of an electrically insulating material and whose diameters gradually decrease are slidably inserted and connected to each other, and among these plurality of short rods 1a, 1b, 1c, A tubular rod consisting of a relatively small diameter short rod 1b, 1c, an insertion part 3a tapered from the proximal end A to the distal end B, and a grip part 3b connected to the proximal end A of the insertion part 3a. The fastening material 3 is slidably loosely fitted, and this fastening material 3 is
These short rods 1b, 1c are configured to be forcibly inserted into the short rods 1a, 1b having a relatively larger diameter than the short rods 1b, 1c to which they are inserted and connected, from the tip portion B, and the insertion portion 3a is is formed by partially cutting out a cylindrical body along its longitudinal direction so that its side surface shape is tapered from the proximal end A to the distal end B, and the grip part 3b is
A working rod for working on live power transmission lines, characterized in that an elastic expansion/contraction cut groove 3c is formed extending from the base end part A of the insertion part 3a.