JP3274804B2 - Wheel passing type anchorage 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 wheel-passing type anchorage device used for anchoring a transmission line or the like to a steel tower.

[0002]

2. Description of the Related Art In a recent overhead wire method, a required wire length based on a distance between towers is derived by calculation, and the wire is cut and a clamp body is mounted on a ground such as a factory.
Many prefabricated overhead wire construction methods are used to transport to a steel tower and complete extension and tightening at the same time.

[0003] As shown in FIG. 4, a conventional wheel-passing type retaining clamp 51 used in this type of prefabricated wire-line construction method.
Is designed to hold an overhead transmission line 52 to a steel tower (not shown) via a link 53 and a tension insulator 54 or the like. A jumper socket 56 for connecting the jumper wire 58 in a non-compressed manner is attached to the clamp body 55 which is compressed and connected to the end of the electric wire 52 and substantially retains it by a through bolt 57.

[0005] As shown in FIGS. 5 to 7, the clamp body 55 includes an inner steel clamp 59 and an outer aluminum clamp 60 that covers the steel clamp 59. The steel clamp 59 has a locking hole 64 for locking the link 53.
, A compression portion 61 into which the end of the electric wire 52 is inserted, and an attachment portion 69 formed between the bracket 68 and the compression portion 61. Mounting part 6
An electrical contact portion 66 of an aluminum clamp 60 is fitted into 9, and the bolt 57 is inserted into the common through holes 63 and 67 and fastened to electrically connect the jumper socket 56. The compression portion 61 is provided with a locking portion 62 having a wavy surface.
By compressing the zero compression portion 65, the electric wire 52 is fixed, and at the same time, the clamps 59 and 60 are integrated.

When the electric wire 52 is extended, the jumper socket 56 is detached from the clamp body 55, and the clamp body 55 can pass through the wheel by eliminating the protrusion. That is, the electric wire 52 is connected to the clamp body 55.
After the wire is extended in a state in which only the jumper wire is attached and tightening is performed, the jumper socket 56 to which the jumper wire 58 is connected in advance is fitted to the clamp body 55 and fixed by the through bolt 57.

[0006]

When the wire is drawn using such a pulling wheel passing type clamping clamp 51, the electric wire 52 to which the clamp body 55 is attached must be
It is wound around a drum when transported, and passes through a wheel when it is extended. However, since the clamp body 55 is relatively long and has a total length of about 800 to 1000 mm, a protector (protective device) is required to prevent a large bending stress from being applied when passing through a wheel while the wire is being drawn. It was attached and removed after the overhead line.

For this reason, there has been a problem that extra work and time are required for attaching and detaching the protector in the prefabricated wire line method. In particular, removal must be performed on a steel tower, which requires a lot of trouble and time. In addition, a drawwheel that applies an appropriate tension to an electric wire has to use a special one in order for the clamp body to pass through, and there has been a problem that the cost is increased.

Accordingly, the present invention has been made to solve the above-mentioned problems.
It is an object of the present invention to provide a wheel-car passing type anchoring device which does not require a protector at the time of wire drawing and can reduce labor, time and cost.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a pulley passing type anchoring device for fastening an end of an electric wire to a steel tower and connecting a jumper wire with a predetermined contact area. An electric wire retaining member for inserting and grasping an end of the electric wire to connect to a steel tower, and a first jumper socket for attaching an end of the jumper wire to the electric wire retaining member with an appropriate contact area. An auxiliary jumper wire having a predetermined length and one end connected to the jumper wire; and a contact area such that the other end of the auxiliary jumper wire is combined with the contact area to form the predetermined electrical contact area. From the wire retention member on the body side of the wire.
And a second jumper socket connected to a position separated by a fixed distance . According to the above configuration, the entire length of the wire retaining member can be reduced, and the wire can be drawn without attaching a protector.

Preferably, the electric wire retaining member is provided with fastening members for attaching the first jumper socket on both radial sides of the end of the inserted electric wire.
Further, the electric wire retaining member includes a steel clamp for inserting an end of the electric wire, and an aluminum clamp for covering the steel clamp and the electric wire, and an electric wire of the aluminum clamp is provided at an end of the steel clamp on the electric wire insertion port side. It is preferable to provide a locking portion for locking these clamps integrally by a compression connection with the clamp. With these, the entire length of the electric wire retaining member can be further reduced.

[0011]

Embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1, a pulley passing type anchoring device 1 of the present invention comprises an electric wire anchoring member 3 for inserting an end of an overhead power transmission line 2, holding the overhead transmission line 2 and holding the same, and an end of a jumper wire 4. A first jumper socket 5 for gripping and attaching to the electric wire retaining member 3 with an appropriate contact area;
An auxiliary jumper wire 6 having a predetermined length and having one end connected to the first jumper socket 5;
Is provided with a second jumper socket 7 for connecting the other end to the main body side B of the electric wire 2.

More specifically, the wire retaining member 3 includes a steel clamp 8 shown in FIG. 2 and a cylindrical aluminum clamp 9 which covers and fixes the steel clamp 8 shown in FIG.

The steel clamp 8 has a retaining portion 11 having a retaining hole 10 at one end on the tower side A for retaining the steel tower.
And a steel clamp compression part 12 into which the end of the electric wire 2 is inserted and gripped on the electric wire main body side B of the retaining part 11, and an aluminum clamp 9 on the electric wire main body side B of the steel clamp compression part 12.
A locking portion 13 whose surface is formed in a wavy shape is formed to be compressed and locked. The locking part 13 is a wire insertion port 24
Is formed. Then, along the axis, the locking portion 1
A shaft hole 14 is formed from 3 to the end of the steel clamp compression portion 12 on the tower side A. A steel core portion, which is the end of the electric wire 2, is inserted into the shaft hole 14 so that the steel core is compressed and gripped. Has become.

The aluminum clamp 9 is formed with an aluminum clamp compression portion 15 for gripping the electric wire 2 at a position closer to the electric wire body B than the steel core portion of the electric wire 2. The aluminum clamp compression section 15 has a length necessary to generate a frictional force capable of fixing the electric wire 2 without being pulled out by its own weight or wind force. At the tower A side of the aluminum clamp 9,
In contact with the first jumper socket 5, an electrical contact portion 16 for flowing a current through the jumper wire 4 is formed. Center hole 1
7 is formed through the aluminum clamp 9 from the electrical contact part 16 to the aluminum clamp compression part 15, and is formed to have a thickness in which the locking part 13 of the steel clamp 8 and the steel clamp compression part 12 are inserted. I have. The electrical contact part 16 is also a fastening part 20 with the first jumper socket 5, and the bolt groove 1 for fixing the first jumper socket 5 with the through bolt 18.
9 are provided. The bolt groove 19 is formed in a semicircular cross section in a direction perpendicular to the electric wire 2 (perpendicular to the paper surface) on both radial sides of the end of the inserted electric wire 2, that is, on the upper and lower sides of the center hole 17 in the drawing. I have. Therefore, by inserting the steel clamp 8 into the aluminum clamp 9,
The steel core portion of the electric wire 2 is inserted up to the electric contact portion 16.

The first jumper socket 5 has a socket 5a for inserting and holding the end of the jumper wire 4 and a socket 5b for holding the auxiliary jumper wire 6. These sockets 5a, 5b is formed in a forked shape. The other end is provided with a holding portion 21 that surrounds and holds the fastening portion 20 of the aluminum clamp 9, and a through hole 22 through which the through bolt 18 serving as a fastening member is formed. By tightening the through bolt 18, the fastening portion 20 and the holding portion 21 are firmly fixed. The inner surface of the holding portion 21 is formed according to the surface shape of the fastening portion 20 of the aluminum clamp 9 so as to increase the contact area. The contact area between the fastening portion 20 and the holding portion 21 is such that the performance of the jumper wire 4 can be transmitted to the wire retaining member 3 via the jumper socket 5 and connected.

The second jumper socket 7 sandwiches the aluminum sleeve 23 provided around the electric wire 2 at a position appropriately distant from the base end of the aluminum clamp 9, and is similar to the first jumper socket 5. Is fixed by tightening the through bolt 18 so as to sandwich the same. The aluminum sleeve 23 has a length that can be compressed by a single compression die, is formed in a hexagonal cross section, and the second jumper socket 7 is also formed in a corresponding shape. The contact area between the second jumper socket 7 and the electric wire 2 via the aluminum sleeve 23 is a predetermined electrical contact area together with the contact area between the first jumper socket 5 and the aluminum clamp 9. It is formed so as to have a contact area.

As described above, the predetermined contact area is divided and shared between the first jumper socket 5 and the second jumper socket 7, so that the fastening portion 20 of the wire retaining member 3 in the axial direction is divided. The length can be reduced, and the total length of the aluminum clamp 9 can be reduced. Further, since the through bolts 18 are arranged on both sides in the radial direction of the end of the electric wire 2 inserted into the aluminum clamp 9, the vicinity of the retaining portion 11 of the steel clamp 8, that is, the compression portion 12 extends to the inside of the electrical contact portion 16. The steel core of the electric wire 2 can be inserted, and the steel clamp 8
Can be reduced in the axial direction. That is,
Since the total length of the steel clamp 8 and the aluminum clamp 9 has been shortened, the electric wire 2 to which the electric wire retaining member 3 is attached in a factory or the like.
Means that the wire retaining member 3
Since no bending stress is applied so that the wire is bent, there is no need to attach a protector, thereby shortening the construction period and cost of the wire drawing work.

In the present embodiment, the aluminum sleeve 23 is provided near the wire body side B of the wire retaining member 3 and is connected by the second jumper socket 7. A jumper socket may be connected.

Although the auxiliary jumper line 6 is connected from the first jumper socket 5, it may be connected to the jumper line 4.

[0021]

In summary, according to the present invention, since the wire staying member can be shortened, the wire staying member is not deformed when the wire is extended, so that the protector does not need to be attached, and the protector is attached and detached. This eliminates the need for a special line-drawing vehicle, and greatly reduces labor, time, and cost.

[Brief description of the drawings]

FIG. 1 is a side view of a wheel-and-wheel passing type retention device showing an embodiment to which the present invention is applied.

FIG. 2 is a side view showing the steel clamp of FIG. 1;

FIG. 3 is a side view showing the aluminum clamp of FIG. 1;

FIG. 4 is a side view showing a retained state of a conventional wheel-passing type retaining clamp.

FIG. 5 is a side view showing a main part of FIG. 4;

FIG. 6 is a side view showing the steel clamp of FIG. 5;

FIG. 7 is a side view showing the aluminum clamp of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 wheel-passing type anchoring device 2 electric wire 3 electric wire retaining member 4 jumper wire 5 first jumper socket 6 auxiliary jumper wire 7 second jumper socket 8 steel clamp 9 aluminum clamp 12 steel clamp compression part 18 penetration bolt 20 fastening part 24 Wire outlet

Continued on the front page. (72) Inventor Kazuyoshi Odaka 4-10-1, Kawajiri-cho, Hitachi City, Ibaraki Prefecture Inside the Toyoura Plant of Hitachi Cable Corporation (72) Inventor Kiyoshi Shimoshima 4-1-1, Kawajiri-cho, Hitachi City, Ibaraki Prefecture No. Nippon Cable Co., Ltd. Toyoura Plant (72) Inventor Kenji Yamamoto 4-10-1, Kawajiri-cho, Hitachi City, Ibaraki Pref. Nippon Cable Co., Ltd. Toyoura Plant (56) References Jikken Sho 43-13396 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) H02G 7/02 H02G 7/20

Claims (3)

(57) [Claims] 1. An end of an electric wire is fixed to a steel tower,
In a wheel-passage type anchoring device for connecting a jumper line with a predetermined contact area, an electric wire anchoring member for inserting and grasping an end of the electric wire and connecting it to the steel tower, and an end of the jumper wire A first jumper socket for mounting the wire jumping member with an appropriate contact area, an auxiliary jumper wire having a predetermined length and one end connected to the jumper wire, and an auxiliary jumper wire. The electric wire withdrawal on the main body side of the electric wire with a contact area such that the other end is combined with the contact area to become the predetermined electric contact area.
And a second jumper socket that is connected to the member at a predetermined distance from the member . 2. The pulley passing type anchoring device according to claim 1, wherein the wire anchoring member is provided with fastening members for attaching the first jumper socket on both radial sides of the end of the inserted wire. . 3. The electric wire retaining member includes a steel clamp into which an end of the electric wire is inserted, and an aluminum clamp covering the steel clamp and the electric wire. 3. The pulling wheel passing and retracting device according to claim 1, further comprising a locking portion for locking said aluminum clamps integrally by compression connection to said electric wires.