JP2969504B2 - 3-point supporting double tension device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiconductor tensioning device which is connected to a support arm of an existing steel tower at three points.

[0002]

2. Description of the Related Art As a conventional device of this type, for example, a triple tension device 71 shown in FIG. 13 is provided with right-angle clevis links 73, 73, 73 fixed to a support arm 72 at three points. One end of the insulator series 77 is connected to the base 73 via a long vernier vernier fitting 74, a horn mounting bracket 75, and a ball clevis 76, each having an adjustment hole arranged in series. The other ends of 77, 77 are connected via a parallel socket link 78 and a horn mounting bracket 79 to a balance yoke 80, that is, connected in the middle and having one side hooked.
Two isosceles triangular yokes 81, 81 connected at equal intervals by mounting brackets 79, 79, 79, and V-shaped arrangements at the apexes of these yokes 81, 81. Two yokes 81, of a balance yoke 80 comprising a substantially triangular yoke 83 connected via a pair of links 82, 82.
The upper and lower ends of a vertical yoke 85 connected to a vertex of a yoke 83 via a right-angle clevis link 84 are connected to a horizontal yoke 8 via right-angle clevis 86 respectively.
7 and 87, and a compression clamp 88 is provided at both ends of each horizontal yoke 87 via a connection fitting.

[0003] Since the transmission line is stretched by the triple insulators 77, 77, 77 as described above, if the load of the transmission line stretched and the distance between the towers are large compared to the double system at that time. I was able to close this kind of thing for a while
Continuous tension devices have been widely used.

However, 30 ton insulators and 33 ton insulators have been developed one after another, and 30 ton insulators have been replaced by 30 ton insulators.
Since the use of multi-conductor double tension devices with insulators or 33-ton insulators has been used, triple tension devices have not been manufactured as old devices. In addition, in the triple tension device, the tip of the support arm 72 of the tower becomes large,
Insulator series 77,77,
There was also a problem that the imbalance of 77 limits the application.

[0005]

However, since the replacement time of the triple tension device is approaching, either of the old triple tension device or the existing double tension device is advantageous for the replacement. A study is underway to see if there are any.

[0006] That is, if the old tension device is replaced with a triple tension device, it is not necessary to modify the support arm 72.
The ground side vernier bracket 74 and the balance yo
Most of the connecting metal fittings including complicated and expensive metal fittings such as 80 are made from the manufacturing drawing as well as the new product, including the die manufacturing, and the versatility of the insulator replacement tool etc. Without the need for a new purchase, there is a disadvantage that the production cost rises.

On the other hand, the current double tension device has three
The structure cannot be attached to the existing support arm 72 of the point support structure. If it is attempted to attach the existing support arm 72 to the existing support arm 72, the existing support arm will need to be remodeled significantly, requiring a large amount of remodeling cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and allows most of the connecting fittings of the existing double tension apparatus to be diverted without modifying the existing supporting arm so that the manufacturing cost and the cost can be reduced. It is an object of the present invention to provide a three-point supporting double tension device capable of reducing replacement construction costs and the like.

[0009]

A three-point support 2 according to the present invention.
The continuous tension device 51 is provided on the existing support arm 72.
The ground-side balance yoke 14 is connected to the three mounting points 1, 1, 1 for connecting the continuous tension device via connecting metal fittings, and the ground-side balance yoke 14 is connected to the ground side 2 of the double tension device. Ren Yo
The connection metal fittings from the clamp 12 to the wire clamp 88 are connected by one point support.

[0010] The ground-side balance yoke 14 is provided with an existing support arc.
Two yokes 4, 4 having an intermediate connecting portion and both ends connected by connecting metal fittings 2, 3 connected to three mounting points 1, 1, 1 of the arm 72, respectively; The two parallel links 7, 7 which divide the inside between the two connection fitting connection points of No. 4 at twice the ratio of the outside and connect one end to the intermediate connection point 6 and the other end of the two parallel links 7, 7 The horizontal yoke 8 is connected to the ground side double yoke 12 of the double tension device via a parallel clevis 11 to the horizontal yoke 8.

[0011] The three-point supporting double tension device 51 is
Most of the existing double tension devices can be used for the connection fitting from the yoke 12 to the wire clamp 88. Further, as shown in FIGS. 10 (a) and (b), it can be provided at a horizontal corner without the ground side vernier metal fittings. Since the total load acts on the parallel clevis connection point in the middle of the horizontal yoke 8 of the ground-side balance yoke 14, the three mounting points 1, 1, 1 of the existing support arm 72 share the load equally. I do.

The three-point supporting double tension device 51 is connected to the electric wire clamp by the compression clamp 8 of the old triple tension device 71.
8 can be diverted while the wire is clamped, and the length of the tension device is previously set to the same length as the triple tension device 71 of the old device, so that complicated wire sag adjustment work can be avoided.

The three-point supporting double tension device 52 according to the present invention.
Connects the ground side balance yoke 37 to the three mounting points 1, 1, 1 provided on the existing support arm 72 for mounting the triple tension device via connecting metal fittings. A connecting bracket from the double insulator string 16, 16 of the double tension device to the wire clamp 88 is connected to the insulator side yoke 36 of the negative pole 37.

The ground-side balance yoke 37 is a two-sided parallel yoke whose both ends are connected to the intermediate connecting portion by connecting metal fittings respectively connected to the three mounting points 1, 1, 1 of the existing support arm 72. Two yokes 4 and 4 and two parallel links 7 and 7 which divide the inside between the connecting points of the connecting fittings of each yoke 4 at twice the ratio of the outside and connect one end to an intermediate connecting point 6. This 2
An insulator-side yoke 36 connected to the other ends of the two parallel links 7, 7 also serves as a ground-side two-sided yoke of the double tension device.

The three-point supporting double tension device 52 provided with the ground-side balance yoke 37 can be provided at a mounting position where the horizontal angle is zero as shown in FIG. Also, if the ground side vernier fitting 35 is interposed between the connecting fittings 2, 3 connected to the three mounting points 1, 1, 1 of the existing supporting arm 72, respectively, FIG. As shown, the ground side vernier fitting 3
5 can be provided at a location having a horizontal angle by adjusting the length.

In the three-point supporting double tension device 52, the insulator side yoke 36 of the ground side balance yoke 37 also functions as the ground side double yoke of the double tension device. The parallel clevis 11 and the ground side 2 of the three-point support twin tension device 51 shown in FIG.
The continuous yoke 12 becomes unnecessary, and the length of the apparatus can be shortened. For this reason, the compression clamp 88 of the triple tension device 71 of the old device is diverted to the electric wire clamp 88 while the electric wire is clamped, and the wire side yoke is independent vertical and horizontal yokes. Even if it is configured, it can have the same length as the old three-unit tension device with a margin, so that the work of adjusting the sag when the electric wire is stretched becomes unnecessary.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A three-point supporting double tension device 51 shown in FIG. 1 has three mounting points 1, 1, 1 provided on an existing support arm 72 for attaching a three-point tension device. The ground-side balance yoke 14 is connected to the ground-side balance yoke 14 via the connection fittings 2 and 3 respectively connected to the ground-side balance yoke 14.
The ground-side double yoke 12 of the double tension device is connected to the ground-side double yoke 12 through a pair of insulators 16 and 16 and the line-side yoke 19 through a multi-conductor. Connecting the fixed yoke 20 for
Since the wire clamps 88 are connected to the upper and lower sides of the multi-conductor fixing yoke 20 via connecting metal fittings, respectively, the existing support arm 72 is not remodeled and most of the existing double tension devices. Can be diverted.
The length of the apparatus was shortened by using the fixed yoke 20 for multiconductors as the wire side yoke.

The ground-side balance yoke 14 is connected to the intermediate connecting point 5 and both ends connecting points 5, 5 by connecting metal fittings 2, 3 connected to three mounting points 1, 1, 1 of the existing support arm 72, respectively. And the middle between the two connecting jigs 4 and 4 connected to each other, and the inside between the connecting fittings 5 and 5 of each yoke 4 is divided into two times the ratio of the outside to the intermediate connecting point 6. It comprises two parallel links 7, 7 having one end connected to each other and having the same length, and a horizontal yoke 8 connected to the other ends of the two parallel links 7, 7 taken in parallel. The horizontal yoke 8 and the ground-side double yoke 12 of the double tension device are connected at one end to a middle point 10 of both link connection points 9 and 9 of the horizontal yoke 8 and at the other end. Are connected by the parallel clevis 11 connecting to the apex portion 13 of the ground side double yoke 12 having an isosceles triangular shape.
The yoke 14 is all composed of a yoke having an offset of zero, so that no imbalance occurs even when there is a wind. In addition, FIG.
As shown in (1), even when the support arm 72 is mounted at a position having a horizontal angle, the yokes 4, 4 and the horizontal yoke 8 are juxtaposed to a straight line connecting the three mounting points 1, 1, 1 of the existing support arm 72. Do not need a vernier bracket between the juxtaposed yokes 4, 4 and the three mounting points 1, 1, 1 of the existing support arm 72.

The three-point supporting double tension device 52 shown in FIG.
The configuration other than the ground vernier bracket 35, the ground side balance yoke 37 and the line side yokes 39, 41, 45 is substantially the same as that shown in FIG. Ground side balance yoke 3 shown in FIG.
Reference numeral 7 denotes a ratio twice as large as that shown in FIG. 1 between two juxtaposed yokes 4 and 4 and the inner side between both connecting metal fittings connecting points 5 and 5 of each yoke 4. And two parallel links 7, 7 having the same length and one end connected to the intermediate connection point 6, and a yoke 36 on the insulator side connected to the other end of the two parallel links 7, 7 taken in parallel. The yoke 36 on the insulator side
Is connected to the ground side of the double tension device by connecting the double insulator rows 16 and 16. Therefore, FIG.
The horizontal yoke 8 and the parallel clevis 11 shown in FIG. 1 are not required, and the length of the apparatus can be shortened.
As shown in FIG. 1 (b), ground side vernier brackets 35, 35, 35 for tilting the side-by-side yokes 4, 4 and the horizontal yoke 36 in a direction having a horizontal angle are required. However,
As shown in FIG. 9, the ground side vernier bracket 35 can be used with a short length, so that the ground side yoke connecting point of the two insulator trains 16, 16 is connected to the mounting point of the support arm 72. 1,1,1
Is shorter than that of the three-point supporting double tension device 51 shown in FIG. For this reason, when the compression clamp 88 of the old triple tension device 71 is diverted to the electric wire clamp while the electric wire is clamped, and when the same length as the triple tension device 71 is used, the adjustment of the wire sag adjustment is omitted. The side yoke is a multi-conductor fixed yoke 20 in the three-point supporting double tension device 51 shown in FIG.
However, this can be constituted by a vertical yoke 39 and horizontal yokes 41 and 45 which are independent from each other.

When the three-point supporting double tension device 52 shown in FIG. 2 is provided at a position where the horizontal angle is zero, the ground side vernier metal fitting 3
5, 35 and 35 may not be provided (FIG. 11A).

[0021]

[Embodiment] An embodiment of the present invention will be described with reference to the drawings. A three-point supporting double tension device 51 shown in FIGS. 1 and 3
Connects the right-angle clevis 3 to the three mounting points 1, 1, 1 (equal intervals) for mounting the existing supporting arm 72 on the triple tension device via the right-angle clevis link 2, respectively. The other ends of the clevises 3,3,3 are connected to the connecting points 5,5,5 of two yokes 4,4 juxtaposed at equal intervals with the mounting points 1,1,1.
And between the right and left clevis connection points 5 and 5 of each yoke 4, the inside is divided into twice the outside ratio and one end of a parallel link 7 is attached at a position 6 so that the length is equal and parallel. The other end of the pair of parallel links 7, 7 is attached to both ends of the horizontal yoke 8, and the midpoint 10 of the horizontal link 8 and the midpoint 10 of the two parallel links 9 The vertices 13 of the side double yoke 12 are connected by parallel clevis 11. The structure from the ground side double yoke 12 to the electric wire clamp, in this embodiment, the compression clamp 88, employs the structure of the existing double tension device.

The ground-side balance yoke 14, which is composed of two juxtaposed yokes 4, 4 and a pair of parallel links 7, 7 and a horizontal yoke 8, is constituted by an offset zero yoke. Side 2
Since the total load acts on the middle point 10 of the horizontal yoke 8 even if the loads applied to the two connecting points of the insulators of the continuous yoke 12 are different, the three mounting points 1, 1, 1 of the existing support arm are provided. With 1 the load can be shared equally and no imbalance occurs. FIG.
As shown in FIG. 10 (b), not only the mounting position having a horizontal angle of zero as shown in FIG. 10 (a) but also the mounting position having a horizontal angle as shown in FIG. Since the yoke 8 is always parallel to the straight line connecting the mounting points 1, 1, 1 of the existing support arm 72, the ground side vernier bracket is unnecessary regardless of the presence or absence of the horizontal angle.

The ground-side double yoke 12 has right-angle clevis links 15, 15 and ball clevis 34, 34 at both ends thereof.
Two insulator rows 16,16, parallel socket links 17,1
7. Double sided yoke 1 via right angle clevis 18
9 is connected, and a fixed yaw for four conductors is attached to the wire side double yoke 19.
The lock 20 is connected so as to be horizontally movable. This fixed conductor for four conductors
The yoke 20 is connected to both ends of upper and lower horizontal yoke portions 21 and 21 integrally connected to the pair of vertical yoke portions 24 and 24 via right angle clevis 22 as shown in FIG.
The near vernier fitting 2 is connected to the near vernier fitting 23.
3 is connected to a compression clamp 88, and the lower vernier bracket 23 is connected to the compression clamp 88 via the single-link 25.
Are linked. It should be noted that the jumper socket 89 of the upper compression clamp 88 protrudes into a space formed in the middle of the lower single-link 25, that is, does not interfere with the single-link 25. The arc 20 is slightly inclined as shown in FIG.

The four-conductor fixed yoke 20 is formed by combining two horizontal yoke portions 21 and 21 and two vertical yoke portions 24 and 24 in a well shape and welding the joint portion. A right-angle clevis 27 is attached to the two vertical yoke portions 24 and 24 by a support shaft 26 so as to be able to move up and down. The insulator-side clevis portion 28 of the right-angle clevis 27 is supported on a wire side double yoke 19 by a support shaft 29. It is mounted so that it can move horizontally.

The three-point supporting double tension device 52 shown in FIGS. 2 and 4 has three mounting points 1, 1, 1 (equal intervals) for mounting the existing supporting arm 72 on the triple tension device. Between the right-angle clevis links 2, 2, and 2 connected to the right-angle clevis 3, 3, and 3 connected to the middle connecting portion of two juxtaposed yokes 4, 4 and both ends. Near metal fittings 35, 35, 35
The ground side balance yoke 37 is provided with two yokes 4 and 4 arranged side by side, a pair of parallel links 7, 7 and the insulator side serving as the ground side double yoke of the double tension device. Except for the point constituted by the yoke 36 and the configuration of the line-side yoke, the structure is substantially the same as that of the three-point supporting double tension device 55 shown in FIG. As a result, the one shown in FIG. 2 has more ground side vernier brackets 35 than the one shown in FIG. 1, but the intermediate yoke 8 and the single link 11 are unnecessary. As shown in FIG. 9, the ground side vernier bracket 35 has one of four bolt holes 31 of one substantially trapezoidal adjustment piece 30 and a pair of fan-shaped adjustment pieces 32 sandwiching the adjustment piece 30. The length of the vernier bracket is relatively short because one of the bolt holes 50 arranged in an arc is connected to the 32 reference bolt holes 33 by bolts. For this reason,
Two insulator trains 1 in three-point support double tension devices 51 and 52
FIG. 2 shows the length from the ground-side yoke connection points 6 and 16 to the attachment points 1, 1, 1 of the existing support arm 72, as shown in FIG.
Shorter than the one shown.

The three-point supporting tension devices 51 and 52 shown in FIGS. 1 and 2 are connected to the electric wire clamp 88 by the triple tension device 71 in the replacement work with the triple tension device 71 shown in FIG.
The compression clamp is used with the wire clamped, and has the same length as the triple tension device 71 so that the wire slackness does not change even if the tension device is replaced. For this reason, when the device length is longer than the triple tension device 71, the three-point supporting double tension device 51 shown in FIG. By doing so, the length is made the same as the triple tension device 71. The three-point supporting double tension device 52 shown in FIG. 2 has a shorter device length than that of FIG. 1, and separates the yoke on the line side from the vertical yoke 39 and the horizontal yoke 41, 4 independent of each other.
5 can be the same length as the triple tension device.

The three-point supporting double tension device 52 shown in FIG.
Although the lengths of the ground side vernier brackets 35, 35, 35 are adjusted at locations having a horizontal angle as shown in FIG. 11B, the horizontal angle is zero as shown in FIG. Since the lengths of the ground side vernier fittings 35, 35, 35 do not need to be changed at the point (3), the ground side vernier fittings 35, 35, 35 can be omitted.

The three-point supporting double tension device 52 shown in FIGS. 2 and 4 has three mounting points 1, 1, 1 of the existing supporting arm 72.
1. Both ends of the insulator-side yoke 36 of the ground-side balance yoke 37 connected to 1 via right-angle clevis links 2, 2, 2, ground-side vernier brackets 35, 35, 35, and right-angle clevis 3, 3, 3. Right angle clevis links 15, 15 and ball clevis 3
, And the other ends are connected with parallel socket links 17, 17 and right angle clevis 1.
8 and 18, it is connected to the line-side double yoke 19, and the line-side double yoke 19 is connected to the line-side double yoke 19 via the right-angle clevis 38.
３９39 are connected. The vertical yoke 39 has an upper end connected to a horizontal yoke 41 via a right angle clevis 40, and a lower end connected to a horizontal yoke 45 via a long right angle clevis 44. The upper horizontal yoke 41 has a right angle clevis 42 at each end and a compression clamp 88 via a wire vernier fitting 43 at both ends, and the lower horizontal yoke 45 has a wire vernier fitting 43 at both ends. , The compression clamp 88 is attached. The wire side vernier bracket 43 is composed of a single fan-shaped adjusting piece 46 and a parallel clevis link or right angle clevis 53.

In the three-point supporting double tension device 52, when the vertical yoke 39 is inclined to the line side to some extent, the jumper socket 89 of the upper compression clamp 88 contacts the lower horizontal yoke 45. May touch. In order to avoid this contact, for example, as shown in FIGS.
A horizontal yoke portion 47 is provided at a lower end of the upper compression clamp 88, and a compression clamp 88 is connected to both ends thereof via a right-angle clevis 42, a wire-side vernier bracket 43, and an arcuate single link 48. The jumper socket 89 can be bypassed by the single bow-shaped link 48.

7 and 8, a horizontal yoke 41 is connected to upper and lower ends of a vertical yoke 39 via right-angle clevises 40, respectively. The wire side vernier bracket 43 is connected via the right angle clevis 42 and the upper wire side vernier bracket 43 is connected.
, A compression clamp 88 is attached to the lower wire vernier fitting 43 via a deformable two-piece link 49.
8, the jumper socket 89 of the upper compression clamp 88 is inserted into the space formed between the two deformed links 49.

[0031]

As described above, according to the present invention, the ground side balance yoke is connected to the three mounting points provided on the existing support arm for mounting the triple tension device via the connecting metal fittings. The ground-side balance yoke is connected to the ground-side double yoke of the existing double tension device at one point, or the ground-side double yoke is connected to the ground-side balance yoke insulator. Because the side yoke is also used, the existing support arm is not modified, and most of the existing double tension yoke after the ground side double yoke or after the double insulator row are used. The connection fitting can be used, and the production cost and replacement construction cost of the three-point supporting tension device that replaces the triple tension device of the old device can be reduced.

In the three-point supporting double tension device according to the present invention, the compression clamp of the old triple tension device is diverted while the electric wire is clamped, and the same length as the triple tension device is used. This eliminates the necessity of adjusting the sag during the installation of the electric wire, thereby reducing the cost of replacing the tension-resistant device and eliminating the need for manufacturing the electric wire clamp.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a plan view of another embodiment of the present invention.

FIG. 3 is a side view of a wire-side connecting bracket connected to the wire-side double yoke of the embodiment shown in FIG. 1;

FIG. 4 is a side view of a wire-side connecting bracket connected to the wire-side double yoke of the embodiment shown in FIG. 2 via a right-angle clevis.

FIG. 5 is a plan view of another embodiment of the line-side connection fitting shown in FIG. 4;

FIG. 6 is a side view of the embodiment shown in FIG.

FIG. 7 is a plan view of another embodiment of the line-side connection fitting shown in FIG. 4;

8 is a side view of the embodiment shown in FIG.

FIG. 9 is a side view of the ground side vernier fitting shown in FIG. 2;

10 is a schematic plan view of the embodiment shown in FIG. 1, wherein (a) shows a case where the horizontal angle is zero, and (b) shows a case where the horizontal angle is provided.

FIGS. 11A and 11B are schematic plan views of the embodiment shown in FIG. 2, wherein FIG. 11A shows a case where the horizontal angle is zero, and FIG.

FIG. 12 is a schematic plan view of a conventional four-conductor triple tension device.
(A) shows the case where the horizontal angle is zero, and (b) shows the case where the horizontal angle is provided.

FIG. 13 is a plan view of a conventional 4-conductor triple tension apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Attachment point 2 Connection metal fitting 3 Connection metal fitting 4 Yoke 6 Intermediate connection point 7 Parallel link 8 Horizontal yoke 11 Parallel clevis 12 Two ground side yoke 14 Ground side balance yoke 16 Insulator chain 19 Two line group Yoke 20 Multi-conductor fixing yoke 35 Ground vernier bracket 36 Insulator side yoke 37 Ground side balance yoke 39 Vertical yoke 41 Horizontal yoke 72 Support arm 88 Wire clamp

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Isamu Hamasaki 3-3-22 Nakanoshima, Kita-ku, Osaka City Inside Kansai Electric Power Co., Inc. (72) Inventor Katsuhiko Shimizu 3-2-22, Nakanoshima, Kita-ku, Osaka Kansai Electric Power (72) Inventor Minoru Toyoda 3-3-22 Nakanoshima, Kita-ku, Osaka-shi Kansai Electric Power Co., Inc. (72) Inventor Hisayuki 3-2-2 Nakanoshima, Kita-ku, Osaka-shi Kansai Electric Power Co., Ltd. 72) Inventor Kazunori Hosomi 3-3-22 Nakanoshima, Kita-ku, Osaka-shi Kansai Electric Power Co., Inc. (72) Inventor Akihiro Katayama 13-1, Isojima Minamicho, Hirakata-shi, Osaka Nippon Katani Co., Ltd. (72) Invention Person Hiroki Sakamoto 131-1 Isojima Minamicho, Hirakata City, Osaka Japan (72) Inventor Akihiro Ikeda 131-1 Isojima Minamicho, Hirakata City, Osaka Nippon Katani Co., Ltd. (56) References JP-A-51-140193 (JP, A) JP-A-4-21310 (JP, A) JP-B-37-15581 (JP, B1) JP-B-57-17686 (JP, Y2) 50/19675 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02G 7/00-7/22 H01B 17/06

Claims (8)

(57) [Claims] 1. A multi-conductor tension device connected to three mounting points (1,1,1) for mounting a triple tension device provided on an existing support arm (72). One mounting point (1,1,1)
To the ground-side balance yoke (14) via a connection bracket,
This ground side balance yoke (14) is connected at one point with a connection fitting from the ground side double yoke (12) of the double tension device to the electric wire clamp (88) by three points. Supporting double tension device. 2. The ground-side balance yoke (14) is intermediately connected by connecting fittings (2, 3) respectively connected to three mounting points (1, 1, 1) of an existing support arm (72). Two yokes (4,4) connected side by side and both ends, and the inside between the connecting points of the connecting fittings of each yoke (4) is divided into two times the ratio of the outside and intermediate Two parallel links (7,7) having one end connected to the connection point (6),
It consists of a horizontal yoke (8) connected to the other ends of the two parallel links (7, 7), and this horizontal yoke (8) has parallel clevis.
2. A three-point supporting double tension device according to claim 1, wherein the ground side double yoke (12) of the double tension device is connected via (11). 3. A multi-conductor tension device connected to three mounting points (1,1,1) for mounting a triple tension device provided on an existing support arm (72). One mounting point (1,1,1)
To the ground-side balance yoke (37) via a connecting bracket,
The earth side balance yoke (37) is characterized in that a connection bracket from the double insulator series (16, 16) to the electric wire clamp (88) is connected to the insulator side yoke (36) of the double tension apparatus. A three-point supporting double tension device. 4. The ground-side balance yoke (37) has an intermediate connecting portion and both ends connected by connecting metal fittings respectively connected to three mounting points (1,1,1) of the existing supporting arm (72). An intermediate connection point which divides the inside between two connected yokes (4, 4) and the connection fitting connection points of each yoke (4) into twice the outside ratio, and
(6), two parallel links (7, 7) having one ends connected thereto, and an insulator-side yaw connected to the other ends of the two parallel links (7, 7).
4. The three-point supporting double tension device according to claim 3, wherein the insulator-side yoke (36) also serves as the ground-side double yoke of the dual tension device. 5. The three attachment points (1, 1) of the existing support arm (72).
Grounding bars are attached to the connecting brackets (2, 3) connected to
4. The three-point supporting double tension device according to claim 3, wherein a near metal member (35) is interposed. 6. The electric wire clamp (88) uses the compression clamp of the old triple tension device as the old device while keeping the wire clamped, and sets the device length to be the same as that of the old triple tension device. 6. The three-point supporting twin tension device according to claim 1, 3 or 5. 7. The two-sided yoke (12) on the ground side of the double tension device is provided with two
Wire-side double yoke (19) connected via insulators (16, 16)
2. A three-point supporting double tension apparatus according to claim 1, further comprising a multi-conductor fixing yoke (20) interposed between the electric wire clamp (88) and the electric wire clamp (88). 8. An independent vertical yoke between a wire side double yoke (19) connected to a double insulator row (16, 16) of a double tension device and an electric wire clamp (88). 4. A three-point supporting double tension device according to claim 3, wherein the yoke (39) and the horizontal yoke (41) are interposed.