JP2784734B2 - Electric wire drum for complete prefabricated overhead wire method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prefabricated electric wire connection in which a plurality of prefabricated electric wires are continuously connected via split wires in order to extend a plurality of tension section spans as one extended line section. The present invention relates to a wire drum for a completely prefabricated overhead wire construction method for winding a wire.

[0002]

2. Description of the Related Art In recent years, a prefabricated electric wire obtained by crimping a compression type clamp at both ends of a wire cut to a fixed length according to a tension section diameter in advance at a factory has been wound around a wire drum, and this prefabricated wire is used at a construction site. The complete prefabricated wire-laying method of extending the wire while sending it out of the drum has been adopted, and as a complete prefabricated wire-line method adopted in the case of an overhead power transmission line as shown in FIG. 1, as shown in FIG. A complete prefabricated overhead wire construction method for a plurality of tension section spans, in which a plurality of tension section spans are extended as one extended section section, has attracted attention. 1 and 2, reference numeral 1 denotes a steel tower, 2
Is a tower arm, 3 is a tension insulator series, 4 is a suspension insulator series, 5 is a compression type clamp, and 6 is an electric wire. The AB section in the figure is the tension section span of one tower span without a suspended tower in the middle, and the BC section is the tension section span of multiple tower spans (2 spans in the figure) with a suspended tower in the middle. . Also,
Reference numeral 7 denotes a wire pulling wire, reference numeral 8 denotes a wire for wire drawing, and reference numeral 9 denotes a wire rope on the wire drawing wheel side.

As shown in FIG. 3, the complete prefabricated wire line method comprises a plurality of prefabricated electric wires 1 manufactured corresponding to a plurality of tension section diameters existing in one extension section.
1 and the wire 12
A series of prefabricated electric wires 13 connected in a factory in a continuous manner in the form of electric wires, split wires, electric wires, etc., is used. One extension section including the span is continuously extended, and the compression type end clamps 5 at both ends of the prefabricated electric wire 11 between the tension section spans are connected to a predetermined tension insulator series 3, and then the split wire 12 is connected. It is a construction method to remove. According to this complete prefabricated wire line construction method, the prefabricated electric wires 11 between a plurality of tension section diameters can be extended at a time, so that the work at the construction site is greatly simplified. The prefabricated electric wire train 13 shown in FIG. 3 includes a special parallel clevis link 14 connected to the compression type retaining clamp 5. Further, the split wire 12 is provided with connecting fittings 15 at both ends of a steel stranded wire rope.
It has.

The electric wire 6 of the prefabricated electric wire 11 is usually
Since the compression type retaining clamp 5 at both ends is made of a steel core aluminum stranded wire (ACSR), and its length is as long as about 1 m, the compression type retaining clamp 5 is simply a cylindrical electric wire together with the electric wire 6. Winding on a drum is not possible because the electric wire near the clamp opening may be damaged due to sharp bending and the electric wire may be damaged by the compression type clamp 5 itself.

[0005] For this reason, the applicant has previously provided a disk-shaped partition plate on the body of the wire drum and attached a movable clamp receiving base to the partition plate. And filed a patent application (Japanese Patent Application No.
No. 151580). According to the wire drum having the partition plate and the movable clamp receiver, the prefabricated wire train 13
By placing the compression type retaining clamp 5 on the side of the beginning of winding of the second and subsequent prefabricated electric wires on the movable clamp receiving base, the clamp 5 is prevented from being caught in the body together with the electric wire 6, and It is possible to prevent the electric wire from being sharply bent in the vicinity of the mouth, so that the prefabricated electric wire train 13 can be wound around the electric wire drum without fear of damage.

However, since the movable clamp receiver protrudes from the side surface of the partition plate, if the movable clamp receiver is simply attached to the partition plate, when the electric wire is wound around the body,
In the part without the movable clamp receiving base, a gap is created between the partition plate and the wound electric wire. In this case, it is not possible to maintain the bale-stacked shape of the wires, and the wires will drop down. And the plywood was placed on the outer surface. This conventional electric wire drum is shown in FIGS. In FIG.
16 is an electric wire drum, 16a is a trunk, 16b is a flange at both ends of the trunk, 16c is a fixed clamp table fixed to the flange 16b, 16d is a partition plate for dividing the trunk 16a into a plurality of regions, and 16e is a partition plate. It is a movable clamp receiving table attached to 16d. As shown in FIG. 18, the wooden seat 17 is radially attached to the partition plate 16d by bolts 18 in a range excluding the movable clamp receiving base 16e. 19 (a), (b), (c), (d),
(E) and (f) show cross sections of the wooden seat 17 at each position. The above-mentioned plywood 19 is formed from the surface of the trunk 16a to the
7 across the entire circumference in the range up to the outermost
And it is stuck on the surface of the movable clamp receiver 16e.

[0007]

By the way, in the manufacturing process of the prefabricated electric wire series, the movable clamp receiving table 16e on which the compression-type retaining clamp on the winding start side of the second and subsequent prefabricated electric wires is placed is the length of the electric wire and the split wire. Since it varies depending on the span of each tension section, it cannot be fixed to the trunk 16a in advance. Therefore, the wire is wound by the specified back tension, and the end of the split wire is set to the partition plate 16d.
The production line is temporarily stopped when the vehicle arrives at the overpass position, and the movable clamp support 16e is attached to the partition plate 16d.
Attach it with bolts 18. Further, the plywood plate 19 is attached after the electric wire including the compression type clamp is wound around once. However, as the manufacture and winding of the electric wire progress, the movable clamp receiver 1 is positioned at the optimal position in the circumferential direction of the partition plate 16d.
It is complicated to attach 6e, attach a plurality of wooden seats 17, and further attach the plywood 19, and the productivity is significantly reduced. In addition, the movable clamp receiving table 16e
Since it is large and heavy because it is necessary to accommodate a compression-type retaining clamp having a long overall length of 1 m, for example, one person supports the movable clamp support and the other person fixes the movable clamp support to the partition plate with bolts. And the like, two-person work is required, and the workability is poor. In this regard, the productivity also decreases and the manufacturing cost increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides an electric wire drum for winding a prefabricated electric wire sequence of a complete prefabricated wire-laying method capable of improving productivity when winding a prefabricated electric wire sequence on an electric wire drum. The main purpose is to

[0009]

SUMMARY OF THE INVENTION In order to extend the span of a plurality of tension sections as one extended section, a plurality of prefabricated electric wires are continuously divided via a split wire in order to extend the span of a plurality of tension sections. An electric wire drum for a complete prefabricated wire-line construction method for winding a connected prefabricated electric wire series, comprising a disk-shaped partition plate provided on the outer periphery of the body of the electric wire drum, and a rail provided on the outer periphery of the partition plate. A pedestal mounting plate having an engaging portion slidably engaged with the rail, and being rotatable around the body in contact with the partition plate, is provided on the pedestal mounting plate. A clamp support for mounting a compression-type retaining clamp on the winding start side of the prefabricated electric wire after the first stage and a pedestal for preventing step-down having the same thickness as the clamp support in a range excluding the clamp support. Characterized by .

According to a second aspect of the present invention, in the electric wire drum according to the first aspect, an auxiliary pedestal which forms the same plane as the pedestal prevention pedestal is disposed between the pedestal prevention pedestal and the surface of the body. The pedestal has a closed recess on the front side of the body that allows the passage of the clamp protection member attached to the wire or the wire within one turn from the clamp holder, and a pedestal for preventing dropping during wire drawing. Characterized in that it is attached to the step-fall prevention pedestal in a manner that it naturally comes off from the base.

According to a third aspect of the present invention, in the electric wire drum according to the second aspect, the auxiliary pedestal has a fitting portion to the step-preventing pedestal, and the auxiliary pedestal and the auxiliary pedestal have an outer side. And are in contact with each other on a tapered surface.

According to a fourth aspect of the present invention, in the electric wire drum of the first aspect, a detachable step-down prevention pedestal having the same thickness as the clamp pedestal is attached to and detached from the pedestal mounting plate above the clamp mounting surface of the clamp pedestal. It is characterized by being provided as possible.

[0013]

In the above construction, the pedestal mounting plate is slidably engaged with the rail on the outer periphery of the partition plate via the engaging portion, so that the pedestal mounting plate can be moved and adjusted in the circumferential direction of the body by a very light force. Can be. Therefore, the clamp pedestal on the pedestal mounting plate can be easily aligned with the position of the compression type clamp at the start of winding of the second and subsequent prefabricated electric wires in the prefabricated electric wire series. At this time, the pedestal for preventing step dropping also comes to an appropriate position. Then, due to the presence of the step-prevention pedestal, the electric wire is wound around the body so that step-down does not occur.

In the second aspect, the auxiliary pedestal also forms a step preventing surface on the outside of the clamp protection member attached to the electric wire or the electric wire within one round from the clamp receiving base. Therefore, the step of the electric wire near the surface of the trunk is also reliably prevented. Since the auxiliary pedestal is easily detached by the force of the electric wire drawn out during the wire drawing, it does not hinder the wire drawing.

According to the third aspect of the present invention, the auxiliary pedestal satisfies both the engagement with the pedestal for prevention of step-down and the ease of detachment from the pedestal for step-down prevention at the time of extension.

According to a fourth aspect of the present invention, the detachable step-down prevention pedestal is provided when the compression-type retaining clamp is housed in the clamp receiving stand at the time of manufacturing the electric wire and when the compression-type retaining clamp is extended when the wire is extended. Remove from the pedestal mounting plate. Then, since the space above the clamp mounting surface of the clamp receiving space is opened, the detachable step-down prevention pedestal does not hinder the operation of storing or extending the compression type retaining clamp.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electric wire drum for a complete prefabricated wire line method according to the present invention will be described below with reference to the drawings. The electric wire drum of the present invention winds a prefabricated electric wire series in which a plurality of prefabricated electric wires are continuously connected via split wires in order to extend a plurality of tension section spans as one extended section. The prefabricated wire string to be wound by the wire drum of the embodiment is, for example, the prefabricated wire string 13 as shown in FIG.

4 to 16 show an electric wire drum 21 according to an embodiment of the present invention. As shown in FIGS. 4 and 5, the electric wire drum 21 has a disk-shaped flange portion 23 having a shaft hole 23 a on both sides of a cylindrical body portion 22. A disk-shaped partition plate 27 is provided at a location, and the first compression type clamping clamp 5 and the special parallel clevis link 14 of the prefabricated electric wire train 13 are mounted on the inner surface of the flange 23 on the winding start side (the left side in FIG. 4). Fixed clamp support 24
Is fixed.

In the present invention, as shown in FIGS. 9 and 10, for example, a rail 30 having a groove-shaped cross section is provided on the outer periphery of each partition plate 27, and an engaging portion slidably engaged with the rail 30 is provided. A pedestal mounting plate 32 which has a base 31 and is rotatable around the outer periphery of the body 22 in contact with the partition plate 27 is provided. A clamp support 28 on which the compression-type retaining clamp 5 is mounted and a plurality of step-down preventing pedestals 40 having the same thickness as the clamp support 28 in a range excluding the clamp support 28 are fixed. Pedestal mounting plate 3 of clamp receiving base 28 and pedestal 40 for preventing step-down
The means for fixing to 2 is optional such as bolting or welding. In addition, as shown in FIG. 4, a flange portion 23 is provided for the first winding start portion of the prefabricated electric wire 11 of the prefabricated electric wire train 13.
Also, the pedestal 40 for step prevention is fixed.

The pedestal mounting plate 32 is a disk having substantially the same diameter as the partition plate 27. The partition plate 27 and the pedestal mounting plate 32 are provided with bolt insertion holes at a large number of positions in the circumferential direction, and the pedestal mounting plate 32 can be fixed to the partition plate 27 by bolts 41 at almost any position in the circumferential direction. . As shown in FIGS. 11 and 12, a roller bearing is used as the engaging portion 31 that engages with the rail 30. The roller bearing is mounted on a bracket 31a welded and fixed to a pedestal mounting plate 32. 33 is attached.

As shown in FIG. 10, the clamp receiving base 28 is integrally provided with a split wire guide 29 having a groove 29a for the split wire 12 to pass over the partition plate 27. The clamp mounting surface 28a of the clamp receiving base 28 in the illustrated example has a flat surface extending substantially tangentially from the outer periphery of the body portion 22 of the electric wire drum 21 (a portion on which the compression type clamp 5 is placed) 28c. And a portion (a portion on which the special parallel clevis link 14 is mounted) 28d in which the angle with the tangential direction of the partition plate 27 is changed by changing the angle.

The step-down prevention pedestal 40 is shown in FIGS.
As shown in FIG. 3, the shape is an elongated rectangular parallelepiped shape extending in the radial direction, and the tip portion reaches near the periphery of the pedestal mounting plate 32. As shown in FIG. 6, up to six step-preventing pedestals 40 (positions A, B, C, D, E, and F in the figure) counted from the clamp receiving table 28 side. A tapered surface 40a is formed on the end surface on the front side of the body portion 22 of the prevention pedestal 40.
Are formed, and the tapered surface 4 which comes into contact with the tapered surface 40a is formed.
An auxiliary pedestal 42 made of plastic having 2a is disposed between the pedestal 40 for preventing step-down and the surface of the body 22.
With respect to three of the auxiliary pedestals 42 at positions B, C, and D, a side through which a clamp protection member 46 described below, which is attached to the electric wire or the electric wire within one turn from the clamp receiving base 28 and passes, is closed. It has concave portions 42b, 42c, 42d. Auxiliary pedestal 4 having recesses 42b, 42c, 42d
In 2, the step-down preventing surface 42e is formed up to the surface of the body 22. Further, two of the auxiliary pedestals 42 at positions E and F have cutouts 42f that are open to the outside through which electric wires pass. In addition, the pedestal 40 for preventing the step from dropping at the position G is the body 22.
, And has no auxiliary pedestal. FIGS. 8A, 8B, and 8C show the detailed structure of the auxiliary pedestals 42 at the position D, for example. As shown in the drawing, the auxiliary pedestal 42 has the tapered surface 42a as described above, and also has a fitting portion 42g that fits into the stepping prevention pedestal 40. In FIG. 8 (a), the left side is the surface that comes into contact with the pedestal mounting plate 32, and the right side is the surface that comes into contact with the electric wires after the second peripheral surface.

In FIGS. 5 and 10, reference numeral 44 denotes a detachable pedestal for preventing a drop. This detachable pedestal 44 for preventing dropping
Has the same thickness as the clamp receiving base 28,
2 and is easily and detachably attached to a position above the clamp mounting surface 28c of the clamp receiving base 28 with bolts 45.

The operation of winding the prefabricated wire train 13 around the wire drum 21 at the factory will be described. Each pedestal mounting plate 32 is temporarily fixed to the partition plate 27 with fixing bolts 41 in advance. First, the compression type retaining clamp 5 and the special parallel clevis link 14 on the winding start side of the first prefabricated electric wire 11 of the prefabricated electric wire series 13 are placed on the fixed clamp receiving stand 24, and then the electric wire 6 is wound around the body 22. Then, when winding up the second and subsequent prefabricated electric wires 11, the split wire 1
At the stage where the terminal end of 2 has reached the position over the partition plate 27, after temporarily removing the fixing bolt 41 temporarily fixed,
The pedestal mounting plate 32 is rotated so that the clamp receiving base 28 is located at the position of the compression type retaining clamp 5 on the winding start side of the prefabricated electric wire 11. In this case, the pedestal mounting plate 32 is supported via an engaging portion (roller bearing) 31 that slidably engages with the rail 30 on the outer periphery of the partition plate 27. The movement can be adjusted in the circumferential direction. Therefore, the operation of adjusting the movement of the clamp receiving stand 28 can be performed by one person and efficiently, and the time during which the production line is stopped can be reduced as much as possible. After the clamp receiving base 28 is moved to a predetermined position in this manner, the pedestal mounting plate 32 is fixed to the partition plate 27 by fixing bolts 41. At this time, the pedestal 40
Of course come to the right place. Then, as shown in FIG. 13, the compression type retaining clamp 5 and the special parallel clevis link 14 are placed on the clamp receiving base 28, and the prefabricated electric wire 11 of the section is wound around the trunk 22 of the section. Since the compression type clamping clamp 5 rides on the clamp cradle 28, the electric wire 6 does not undergo a sharp bend at the mouth of the compression type clamping clamp 5, and is wound around the body 22 in a smooth curve. Therefore, damage to the electric wire due to bending at the mouth of the compression type clamp 5 is prevented. When performing this work, the detachable pedestal-preventing pedestal 44 is obstructed for accommodating the compression type retaining clamp 5, so that it is detached and attached to the pedestal mounting plate 32 with bolts 45 after the work is completed.
Also, when extending the prefabricated electric wire train 13 at the time of extension,
The detachable step-down prevention pedestal 44 hinders the extension of the compression type clamping clamp 5 and is removed. FIG. 13 shows a case in which a clamp protection member (clamp protector) 46 for protecting the bending of the clamp body at the time of wire drawing is attached to the tip of the body of the compression type clamping clamp 5. The clamp protection member 46 is attached to the distal end of the compression type clamp 5 while covering the electric wire.
It is put on the compression type clamping clamp 5 at the time of wire drawing. As shown in FIG. 14, the clamp protection member 46
6a and an intermediate ring portion 46b. The outer diameter of the clamp protection member 46 is usually equal to the compression type clamp 5.
Is 1.5 to 2 times the outer diameter of the clamp base 28 and the thickness of the clamp receiving base 28 and the step-down prevention pedestal 40 are determined thereby.

In the above-described embodiment, a plurality of elongated rectangular parallelepiped bar-shaped step-down prevention pedestals 40 are radially arranged.
5, as shown in FIG. 16, a step-preventing pedestal 4 of a continuous and integral structure extending integrally from the clamp receiving base 28A in the circumferential direction.
It can be 0A. In this case, the auxiliary pedestal 42A may be attached to the step-down prevention pedestal 40A. FIG. 16 shows a cross-sectional shape of the auxiliary pedestal 42A.
Basically, it is almost the same as the case of FIG.

As for the material of each of the above members, it is preferable to use mainly mild steel, but the auxiliary pedestal 42 is preferably made of plastic such as polyethylene, hard rubber, or wood. However, it is naturally possible to manufacture the auxiliary pedestal 42 with a metal material such as aluminum or steel. In this case, the surface may be covered with a buffer made of rubber, plastic, or the like to protect the electric wires.

The cross-sectional shape of the rail 30 and the engaging portion 31 that engages with the rail 30 are not limited to those shown in the drawings, and can be changed as appropriate. Further, in the embodiment, the case where the special parallel clevis link 14 is connected to the compression type retaining clamp 5 is described. However, the present invention can be applied to the case where the special parallel clevis link 14 is not provided. Also,
In the embodiment, the connection fitting 15 is fitted and fixed to the end of the split wire 12, but a simple ring may be formed.

[0028]

According to the present invention, the clamp receiving pedestal and the step-down preventing pedestal are fixed on the pedestal mounting plate whose rotational position can be adjusted on the partition plate. The position can be easily adjusted to the position of the compression type anchoring clamp on the winding start side of the second and subsequent prefabricated electric wires. At that time, the pedestal for preventing the dropping of course also comes to an appropriate position. Therefore, when manufacturing the prefabricated wire series,
This eliminates the need to suspend the production line for a long time for mounting the clamp receiving pedestal and the step-down prevention pedestal, thereby improving productivity. Then, due to the presence of the step-prevention pedestal, the electric wire is wound around the body so that step-down does not occur. In addition, the presence of the clamp cradle on which the compression-type clamping clamp is placed prevents the wire from being sharply bent at the mouth of the compression-type clamping clamp and is wound around the body in a smooth curve, preventing damage to the cable. Is done.

According to the second aspect, the presence of the auxiliary pedestal reliably prevents the electric wire from dropping in the vicinity of the body surface. In this case, the auxiliary pedestal is easily dislodged by the force of the electric wire drawn out during the wire drawing, and does not hinder the wire drawing.

According to the auxiliary pedestal of the third aspect, both the engagement with the pedestal for preventing step-down and the ease of detachment from the pedestal for step-down prevention at the time of extending the wire are satisfied.

According to the fourth aspect of the present invention, the presence of the detachable pedestal for preventing dropping can surely prevent the stepping of the electric wire in the vicinity of the clamp receiving stand, and can also be used when storing or feeding out the compression type clamp. By removing the detachable pedestal for preventing dropping, the work can be prevented from being hindered.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of an overhead power transmission line employing a complete prefabricated overhead line construction method.

FIG. 2 is a view for explaining a point of a complete prefabricated wire construction method for carrying out the wire of the embodiment of FIG. 1;

FIG. 3 is a side view showing an example of a prefabricated electric wire series wound around an electric wire drum of the present invention.

FIG. 4 is a front view of the electric wire drum according to the embodiment of the present invention.

FIG. 5 is a schematic sectional view taken along line AA of FIG. 4;

6 is a cross-sectional view of a pedestal portion for preventing step-down at each position of A, B, C, D, E, F, and G in FIG. 5; It is.

FIG. 7 is a sectional view taken along the line BB of FIG. 6A.

FIG. 8 shows details of an auxiliary pedestal in FIG. 6D.
2A is a front view, FIG. 2B is a left side view, and FIG. 2C is a plan view.

FIG. 9 is an enlarged view of a portion C in FIG. 4;

FIG. 10 is an enlarged view of a main part in FIG.

FIG. 11 is an enlarged view of a main part in FIG. 9;

FIG. 12 is a sectional view taken along line DD of FIG. 11;

FIG. 13 is a diagram showing a state in which the prefabricated electric wire is wound around the trunk almost one round in FIG. 5;

FIG. 14 is an enlarged view of the clamp protection member in FIG.

FIG. 15 shows another embodiment of the electric wire drum of the present invention, and is a view corresponding to FIG.

FIG. 16 is a diagram of each of A, B, C, D, E, F, and G in FIG.
3 is a cross-sectional view of each position of A, B, C, D, E, F, and G in FIG.

FIG. 17 is a front view showing a conventional electric wire drum.

18 is a sectional view taken along the line EE of FIG. 17;

FIG. 19 is a cross-sectional view of each of the wooden seats A, B, C, D, E and F shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 5 Compression retention clamp 6 Electric wire 11 Prefabricated electric wire 12 Split wire 13 Prefabricated electric wire connection 21 Electric wire drum 22 Body 27 Partition plate 28 Clamp receiving stand 30 Rail 31 Engagement part (roller bearing) 32 Pedestal mounting plate 40, 40A Step drop prevention Pedestal 42, 42A auxiliary pedestal 42a tapered surface 42b recess 44 detachable pedestal

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) H02G 1/00 B65H 75/00

Claims (4)

(57) [Claims] 1. A prefabricated overhead wire for winding a series of prefabricated electric wires formed by continuously connecting a plurality of prefabricated electric wires via split wires in order to extend a plurality of tension section spans as one extended line section. An electric wire drum for a construction method, comprising a disk-shaped partition plate provided on an outer periphery of a body of the electric wire drum, a rail provided on an outer periphery of the partition plate, and an engaging portion slidably engaged with the rail. And a pedestal mounting plate that is rotatable around the body in contact with the partition plate, and is provided on the pedestal mounting plate at the start of winding of the second and subsequent prefabricated electric wires of the prefabricated electric wire series. An electric wire drum for a complete prefabricated wire-building method, characterized in that a clamp support for mounting a clamp and a step-down prevention pedestal having the same thickness as the clamp support in a range excluding the clamp support are fixed. 2. An auxiliary pedestal forming the same plane as the step-down preventing pedestal is disposed between the step-fall-preventing pedestal and the surface of the body, and the auxiliary pedestal is clamped on the surface of the body. An electric wire within one turn of the base or a clamped protective member attached over the electric wire has a closed concave side through which it can pass, and is used to prevent a step from dropping naturally from the step-preventing pedestal when extending. 2. The electric wire drum according to claim 1, wherein the electric wire drum is attached to a pedestal. 3. The auxiliary pedestal has a fitting portion to the step-down prevention pedestal, and the step-down prevention pedestal and the auxiliary pedestal are
3. The electric wire drum according to claim 2, wherein the auxiliary pedestals are in contact with each other at a tapered surface so as to be outward. 4. A detachable step-down prevention pedestal having the same thickness as the clamp pedestal is provided at a position above the clamp mounting surface of the clamp pedestal on the pedestal mounting plate. Item 2. An electric wire drum for a complete prefabricated wire line method according to item 1.