JPH0516249B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a lead-in fitting for an overhead power distribution ground line re-stretching method.

(Prior Art and Problems) Conventionally, when replacing an overhead power distribution ground line, a power outage was performed on the lower distribution line, and during that time, the old ground line was removed and a new ground line was extended. However, in recent years, due to changes in social conditions during re-upholstery work, especially in urban areas, due to the use of computers, it is not allowed to work without a power outage even for a moment, and it is difficult to carry out work without power outage. It was something that was required. Therefore, in order to carry out the replacement work while the line is live, a group of connected metal wheels supporting the support cables at predetermined intervals is mounted on the old ground line in the span, and the support cables and the live wires below are mounted. After tensioning the support cables in the construction span, loosening the old ground line at the top position and increasing the tension on the support cables at the bottom position, the vertical positions of both lines are reversed, and the line is placed at the bottom position. By connecting the new land line to the end of the old land line and pulling out the old land line, the new land line is expanded within the span, and the line is turned upside down again, the new land line is tightened, and the line is mounted on the new land line. The construction method used was to pull out a group of metal wheels holding supporting ropes.

However, according to this construction method, the construction work is carried out one span at a time, or, if construction is to be carried out on multiple spans at the same time, workers wait at the intermediate pillars and reinstall the metal wheels into the spans one after another. This required dangerous work on poles and was inefficient.

(Means for Solving the Problems) Accordingly, in the present invention, in order to carry out work continuously over multiple spans, a metal wheel pull-in fitting is arranged on the intermediate column to allow a group of metal wheels to pass through. This invention discloses an efficient method for replacing overhead ground wires that eliminates the need for workers to wait.

(Example) In order to make the construction method of the present invention possible, the biggest structural requirement is the lead-in metal fittings arranged on each intermediate pillar.

As shown in Figs. 2 and 3, the lead-in fitting is provided with a frame 2 that is connected to the upper hanging part 1 and opens downward in a substantially V-shape.
One side is movable for the purpose of providing a wire insertion hole 3, and is fixed by pressing a notch groove 6 of the movable frame 2 which is rotatably fitted into the frame shaft 5 with a tightening screw 4. A shaft 7 is bridged between both open ends of the frame 2, and a rotating body 8
The shaft is fixed. The rotating body 8 has a predetermined number of roller shafts 10 fixed between the peripheral edges of a disc-shaped side plate 9, and a resin roller 11 is rotatably provided in the center of the roller shafts 10.

Further, from the contact surface of the roller shaft body 10 with the side plate 9 to the end of the roller 11, an inclination is provided toward the center between the both side plates 9, so that the rotating body 8 is formed into a substantially hexagonal shape.

Also, a collar 13 is provided between the center hole 12 between the side plates 9.
is fixed, and a shaft 7 inserted through the frame 2 is inserted into the interior to allow the rotating body 8 to rotate freely. Color 1
In order to prevent the later-described inverted metal wheel from falling into the donut-shaped space between the collar 13, the roller 11, and the roller shaft 10, a disk-shaped plate 14 is disposed perpendicular to the collar 13. In order to prevent the line from falling between the frame 2 and the rotating body 8, the frame 2 has a
A guard 15 is provided.

Furthermore, in order to correspond to the horizontal angle of the utility pole array in the wire span, the hanging part 1 is provided with an angle adjusting part 16, and is configured to be fixed at a predetermined angle by fitting a pin 18 into the pin hole 17 of the angle adjusting part 16.

Further, a hanger 19 is provided at the upper part of the wire insertion hole 3 formed by the frame 2 and the rotating body 8 and at the base of the frame 2.

The configuration of the lead-in fitting A is as described above, but the other main equipment is an inverted metal wheel.

As shown in FIGS. 8 and 9, the reversible metal wheel B has an upper roller 22 and a lower roller 23 made of resin attached to the upper and lower ends of a fixed frame 21 on one side, respectively, and a fixed shaft 24 in the middle between them. and a bearing hole 26 of the open frame 25 passing through the tip of the fixed shaft 24.
Furthermore, it has a wire insertion portion 28 which receives the shafts of the upper and lower rollers 22, 23 and can be opened vertically by means of a tightening nut 27 screwed into the fixed shaft 24 from the outside of the open frame 25. Furthermore, the fixed shaft 24 covers a spacer 29 having a triangular cross section, and therefore the wire insertion portion 28 formed between the upper and lower rollers 22, 23 and the spacer 29 also has a substantially triangular shape. be.

Further, the connecting ring 3 is provided in a manner that protrudes from the spacer 29.
0 protrudes to both sides.

In addition to the lead-in fitting A and the reversing metal wheel B configured as above, the lead-in metal fitting mounting arm C and each reversing metal wheel B are installed to install the lead-in metal fitting A at the ground wire position located at the top of the utility pole P. We will use equipment such as a connecting rope R to connect the old ground line to be replaced, and ground line retaining fittings F to hold the old ground line to utility poles at both ends of the construction span.

To describe the work procedure of the present construction method, ground wire retaining fittings F are installed on the pillars at both ends of the construction span, and the old ground wire ends are held in place. Further, a pull-through fitting mounting arm C is attached to the intermediate column, and the hanging portion 1 of the pull-through fitting A is connected to it. At this time, if the intermediate pillar has a horizontal angle, the angle adjustment part 16
A predetermined pin hole 17 is selected, the metal fitting A is tilted and attached to the inside of the curve, the frame 2 is opened, and the old ground wire is supported on the rotary body 8 roller 11 in the wire insertion hole 3.

In addition, the extended rope W rising from the ground is supported by a pulley 31 provided on the ground wire holding fitting F, and is supported adjacent to the old ground line G of the pulling fitting A at the intermediate column, and is connected to the ground line of the other end column. It is supported by the retaining metal fitting F pulley 31 and pulled down onto the other side. The upper rollers 22 of the inverted metal wheels, which are connected at predetermined intervals from one end of the pillar side by connecting ropes R and support the messenger ropes M on the lower rollers 23, are mounted on the old ground line, and the leading end is extended. Connect to the end of the wire rope W. At this time, the triangular spacers 29 of the reversible metal wheel B are all connected in the same direction. By taking the extended rope W from the ground on the other end pillar side, the inverted metal wheel group is spread out over the span, and the messenger rope M supported by each metal wheel B is stretched across the span without hanging down. When it reaches the pull-through fitting A of the intermediate column, the reversing metal wheel B is fitted horizontally between the roller shafts 10 of the rotating body 8, and as the extended rope W is wound up, the rotating body 8 rotates. It passes through the pull-through fitting A. When this pull-in fitting A passes, the reversing metal wheel B, which is oriented sideways between the roller shafts 10 of the rotating body 8, is prevented from falling into the space between the roller shafts 10 and the shaft 7, thereby ensuring smooth passage. In order to achieve this, a plate 14 that is perpendicular to the shaft 7 is provided upright.

When the Metsusenjar rope M is deployed over the entire length of the construction span, its both ends are temporarily fastened to the ground wire holding fitting F, and after hanging it on the hanger 19 in the drawing fitting A at the intermediate column, the tension of the old ground wire G is is loosened, and at the same time, the tension of the messenger rope M is increased to reverse the vertical position of the old ground wire and the messenger rope. During this reversal, the direction of reversal is determined by the triangular spacer 29 of the reversing metal wheel B, and by connecting the spacers 29 of the reversing metal wheel B in the same direction, both lines are reversed in the same direction. This prevents the two lines from becoming entangled.

When the reversal is completed, the Metssenja rope M is tightened and the new ground line GW is placed at the end of the old ground line G, which is in the lower position.
Shinchi wire by connecting and winding the other end.
The GW is pulled out in the lower roller of the reversing metal wheel B and wire is stretched. Shinchi Line GW over the entire length of the construction span
When it is unfolded, it is reversed again, the new ground wire in the upper position is tightened, the messenger rope M is supported on the reversing metal wheel B to prevent it from hanging down, and the connecting rope is wound up and reversed. It is used to collect gold cars.

Note that in this example, the reversal is performed twice using a messenger rope, but another method is to directly extend the Shinchi wire instead of the messenger rope, and the reversal can be completed only once. It is possible to use an efficient construction method.

This can be said to be a possible construction method if the strength of the old ground line is guaranteed.

(Effects of the Invention) As described above, by using the lead-in fitting of the present invention, it is possible to replace the old and new ground wires at once over the entire length of the span scheduled for construction, instead of replacing them one span at a time as in the past. The inverted metal wheel group, which had previously been used, can now be carried out from one end of multiple construction spans, eliminating the need for long hours of work by climbing up to an intermediate pillar.

In addition, the number of workers required is reduced, and the reduction in work required to go up and down utility poles reduces the risk of accidents such as falls.

[Brief explanation of the drawing]

Figure 1 is a construction procedure diagram, Figure 2 is a front view of the lead-in fitting, Figure 3 is its left side view, Figure 4 is a front view of the lead-in fitting attached to the utility pole, and Figure 5 is its right side. Figure 6 is a front view of the inverted metal wheel passing through the pull-in fitting, Figure 7 is a partially cutaway right side view, and Figure 8 is a front view of the inverted metal wheel. Figure 9 is a partially cutaway right side view, No. 1
Figure 0 is a front view of the other wire pull-down fitting, and Figure 11 is its right side view. Symbols in the diagram A... Leading metal fitting, B... Reversing metal wheel, C... Drawing fitting mounting arm, F... Ground wire holding fitting, G... Old ground wire, GW... New ground wire, M...
Metsusenjar rope, P...Telephone pole, R...Connecting rope, W...Extension rope, 1...Hanging part, 2...
...Frame, 3...Wire insertion hole, 4...Tightening screw,
5... Frame shaft, 6... Notch groove, 7... Shaft, 8
... Rotating body, 9 ... Side plate, 10 ... Roller shaft body, 11 ... Roller, 12 ... Center hole, 13 ...
...Color, 14...Plate, 15...Guard,
16... Angle adjustment section, 17... Pin hole, 18...
Pin, 19... Hanger, 20... Hanging member, 2
1...Fixed frame, 22...Upper roller, 2
3... Lower roller, 24... Rotating shaft, 25...
Open frame, 26...Bearing hole, 27...Tightening nut, 28...Wire insertion part, 29...Spacer,
30...Connection ring, 31...Pulley.

Claims (1)

[Claims] 1 Angle adjustment part 1 consisting of pins 18 provided on the hanging member 20 and pin holes 17 arranged at regular intervals on an arc
6 constitutes a hanging part 1, and one side of a frame 2 that is connected to the hanging part 1 and opens downward in a substantially V-shape is screwed to the V-shaped base so that it can be opened and closed freely. Roller 1 is placed in the center of the periphery between the plates 9.
1. A lead-in fitting for an overhead ground wire relining method, characterized in that a rotating body 8 connected by a predetermined number of roller shaft bodies 10 arranged with 1 is rotatably fixed.