JP3228379B2 - Clamping device for ridged wires - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp device suitable for holding an electric wire having a spiral ridge on the outer periphery.

[0002]

2. Description of the Related Art Recently, an electric wire 1 having a spiral ridge 2 on its outer periphery as shown in FIG. 9 has been used as an overhead transmission line (Japanese Patent Laid-Open No. 4-87210). Generally, this type of ridged wire has a transmission voltage of 500,000 to 100,000.
Used for 100,000V UHV transmission lines.

Conventional electric wires for overhead power transmission lines have a circular cross section. However, such electric wires generate wind noise when the wind is strong, and cause environmental problems. . However, for UHV transmission lines, 1
Since the number of conductors per phase can be as large as 6 to 10, winding a spiral rod around each of them takes a lot of time for the construction and causes an increase in construction costs.

[0004] Therefore, the ridged electric wire is provided on a part of the outermost layer at the time of manufacturing the electric wire, with a wire 4 having a height higher than the other outermost wires 3.
(See FIG. 9) to form a helical ridge 2 to reduce wind noise. In the example shown in FIG. 9, the ridges 2 are formed as a set of two ridges for the purpose of electric field relaxation.

[0005] The following devices are conventionally known as clamp devices such as spacers and dampers for gripping the above-mentioned ridged electric wire. One in which an armor rod is wound around the outer periphery of the ridged wire to fill the ridge, the cross section is made circular, and then tightened with a clamp (Japanese Patent Publication No. 1-58728). An electric wire with a ridge is covered with a split collar having a groove into which a ridge is formed on the inner surface, and clamped from above with a clamp (Japanese Utility Model Application Laid-Open No. 63-137522). The outer circumference of the ridged wire is covered with a split collar that is split in the direction of the ridge by the width of the ridge, and clamped from above with a clamp (Japanese Utility Model Laid-Open No. 63-1375).
No. 22).

[0006]

However, in the clamp structure described above, since a large number of armor rods need to be wound for each clamp, the installation is troublesome, and there is a risk that the armor rods may fall during the installation. is there.

Further, in the above-mentioned clamp structure, since the split collar and the clamp fitting are separate parts, it is necessary to tighten the clamp collar while holding down the split collar attached to the outer periphery of the electric wire. And there is a risk that the collar may fall during construction.

In order to prevent the split collar from falling,
It is conceivable to attach the halved collar to the clamp, but in this case, the circumferential position of the halved collar is determined by the mounting direction of the clamp. In some cases, the position does not match the circumferential position of the ridge of the electric wire, and in this case, normal tightening cannot be performed.

It is an object of the present invention to provide a clamp device in which the split collar does not fall off the clamp, and the circumferential position of the split collar can be adjusted with respect to the clamp.

[0010]

SUMMARY OF THE INVENTION To achieve this object, the present invention provides a clamp apparatus for a ridged electric wire through a split collar having a ridge storage section by a pair of hinged clamps. An elastic wire (spring material or wire) having a length longer than a half circumference of the outer peripheral surface of the split collar in a state of being assembled in a cylindrical shape, the wire having a protrusion being provided. A connecting member that slidably supports the striated body, wherein the elastic striated body has a gap between itself and the outer peripheral surface of the split collar in a state of being combined in a cylindrical shape, and has two ends at two ends. To one color piece of split color,
The other end is fixed to the other collar piece of the split collar, and the connecting member is supported by a shaft pin for hinge-connecting the pair of clamps.

[0011]

According to the above construction, the split collar is connected to the shaft pin for hinge-connecting the pair of clamps by the elastic filament and the connecting member, so that the collar is not separated from the clamps and protrudes. There is no danger of dropping when attaching to the stripped electric wire.

[0012] Further, since the elastic filament having both ends fixed to the split collar is slidably supported by the connecting member, the position of the split collar in the circumferential direction can be adjusted within the clamp. It becomes possible. For this reason, regardless of the mounting direction of the clamp, the protrusion housing portion of the split collar can be aligned with the protrusion of the electric wire.

The reason why the length of the elastic filament is longer than the half circumference of the outer peripheral surface of the split collar is to allow a sufficient adjustment range in the circumferential direction of the split collar. The reason why a gap is provided between the elastic filament and the outer peripheral surface of the split collar is to facilitate the sliding of the elastic filament and the connecting member.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 8 show one embodiment of the present invention. This clamp device is for clamping the ridged electric wire 1 as shown in FIG. 9 through a split collar 13 by a pair of clamp fittings 11A and 11B.

As shown in FIGS. 1 to 5, one side of the clamp fittings 11A and 11B is hinged by a shaft pin 15, and the other side is freely openable and closable. The open ends of the clamps 11A and 11B are fastened by the fastening member 17 as shown in FIG. The fastening member 17 is a known member including a rod 21 having a T-shaped head 19 at one end, a cam member 23 for fastening attached to the other end, a washer 25, a spring 27, and the like. However, a bolt nut or the like can be used as the fastening member 17.

As shown in FIGS. 6 to 8, the split collar 13 is composed of a pair of substantially semi-cylindrical collar pieces 13A and 13B. (See FIG. 9). Color pieces 13A, 13B
Flange portions 31A and 31B are integrally formed at both ends of the, and the flange portions 31A and 31B are connected by hinge pins 33 on one side. For this reason, a pair of collar pieces 13A, 13
B can be opened and closed as shown in FIGS.

An elastic strip 35 is provided on the outer periphery of the split collar 13. The elastic member 35 is slidably supported by a U-shaped connecting member 37. The length of the elastic strip 35 is sufficiently longer than the half circumference of the outer peripheral surface in a state where the split collars 13 are combined in a cylindrical shape (the state of FIG. 7). One end of the elastic strip 35 is fixed to one collar piece 13A, and the other end is fixed to the other collar piece 13B by screws 39, respectively.
In this state, the elastic strip 35 has a gap between itself and the outer peripheral surface of the split collar 13 and, as shown in FIG.
Are slidably inserted into the holes 41 at both ends of the connecting member 37, so that the connecting member 37 can be rotated by about a half turn or more.

As shown in FIGS. 1 to 5, the connecting member 37 is supported by a shaft pin 15 for hinge-connecting the clamps 11A and 11B. In order to support the connecting member 37 on the shaft pin 15, a notch 43 having a width for receiving the connecting member 37 is formed in the shaft pin penetrating portion of the clamp piece 11B as shown in FIGS.

The order of assembling the clamp device is as follows: first, the split collar 13, the elastic strip 35, and the connecting member 37 are assembled as shown in FIGS.
The shaft pin 15 may be fixed to the clamp fitting 11B after the shaft pin 15 is inserted through the notch 43 of B and penetrates the clamp fittings 11A and 11B and the connecting member 37. Clamp fitting 11
As shown in FIG. 3, a circumferential groove 45 for accommodating the elastic strip 35 is formed on the inner surface of each of A and 11B.

Since the clamp device has the above-described structure, the split collar 13 does not separate from the clamp fittings 11A and 11B. For this reason, the clamp fittings 11A and 11B
There is no danger that the split collar 13 will fall when tightening. Since the elastic member 35 is slidably supported by the connecting member 37, the split collar 13 is also rotatable with respect to the clamp members 11A and 11B together with the elastic member 35. For this reason, even if the clamp fittings 11A and 11B are oriented in a certain direction, it is possible to rotate the split collar 13 therein and align the groove 29 of the split collar 13 with the ridge of the electric wire.

It is desirable that the elastic strip 35 be formed in advance to have a radius of curvature larger than the radius of curvature of the outer peripheral surface of the split collar 13 (for example, a radius of curvature as shown in FIG. 6). In this manner, when the clamps 11A and 11B are opened as shown in FIG.
13 opens, making it easier to attach to the wire.

The above is one embodiment of the present invention, and the present invention is not limited to this. For example, in the above-described embodiment, the elastic wire is used as the elastic wire, but an elastic wire may be used instead.

As the split collar, a collar in which two collar pieces are not hinged can be used. In this case, the two collar pieces are connected only by the elastic filament.

In the above embodiment, the split color is
A groove with a ridge on the inner periphery is used to insert the ridge of the wire, but the split collar is spaced by the width of the ridge in the direction of the ridge of the wire with the ridge. It may be of a structure that is split and has a ridge between two collar pieces.

In the above embodiment, the split color is used, but a split color may be used instead. In that case, the split collar is hinged so that a groove is formed on the inner peripheral surface to receive the ridge of the ridged wire, and the two collar pieces can be opened and closed on both sides of one collar piece. It will be. Also, it is desirable to use an elastic filament that is longer than a half circumference, preferably longer than two-thirds, of the outer peripheral surface of the three-part collar assembled in a cylindrical shape. In addition, the elastic filament body is provided with a gap between the outer peripheral surface of the three-part collar assembled in a cylindrical shape, and one end is attached to a collar piece on one open / close end side of the three-part collar, and the other end is provided. Is fixed to the collar piece on the other open / close end side of the split collar.

[0026]

As described above, in the clamp device according to the present invention, the split collar or the split collar is connected to the shaft pin of the clamp by the elastic wire and the connecting member. There is no danger that the split collar or the split collar will fall when clamping the ridged wire, and it is safe and excellent in workability. In addition, since the halved collar or the halved collar is rotatable with respect to the clamp, regardless of the mounting direction of the clamp to the wire, the halved collar or the halved collar is rotated to The collar or three-part collar projection storage section can be matched to the projection of the electric wire, and a normal tightening state can always be obtained.

[Brief description of the drawings]

FIG. 1 is a front view of a clamp device according to an embodiment of the present invention, showing a state where a clamp is opened.

FIG. 2 is a front view showing the clamp device of FIG. 1 in a state where a clamp is closed;

FIG. 3 is a sectional view taken along line PP of FIG. 2;

FIG. 4 is a right side view in the state of FIG. 2;

FIG. 5 is a plan view in the state of FIG. 2;

6 is a cross-sectional view of the assembly of the split collar, the elastic strip, and the connecting member in the clamp device of FIG. 1, showing a state in which the split collar is opened.

FIG. 7 is a sectional view showing a state in which the split collar is closed.

FIG. 8 is a right side view in the state of FIG. 7;

FIG. 9 is a sectional view showing an example of an electric wire with a ridge.

[Explanation of symbols]

 1: Wire with protruding line 2: Protruding line 11A, 11B: Clamp bracket 13: Split collar 13A, 13B: Collar piece 15: Shaft pin 17: Tightening member 29: Groove for accommodating protruding line 31A, 31B: Flange 33: Hinge pin 35: Elastic strip 37: Connecting member 43: Cut 45: Groove for storing elastic strip

────────────────────────────────────────────────── (5) References JP-A-60-5719 (JP, A) JP-A 64-25833 (JP, U) JP-A 5-55727 (JP, U) (58) Investigation Field (Int. Cl. ⁷ , DB name) H02G 7/00

Claims (7)

(57) [Claims] 1. A ridged electric wire clamping device for tightening a ridged electric wire through a split collar having a ridged storage portion by a pair of hinge-joined clamps, comprising a cylindrical combination. An elastic filament that is longer than a half circumference of the outer peripheral surface of the split collar in a set state, and a connecting member that slidably supports the elastic filament, the elastic filament is combined into a cylindrical shape. With one end fixed to one collar piece of the split collar and the other end fixed to the other collar piece of the split collar. The connecting member is supported by a shaft pin for hinge-connecting the pair of clamps, The clamp device for a ridged electric wire. 2. The clamping device according to claim 1, wherein a groove is formed on an inner peripheral surface of the split collar so as to receive a ridge of the ridged electric wire. 3. The clamping device according to claim 1, wherein the two-part collar is divided in the direction of the ridge of the ridged wire at intervals by the width of the ridge, and the two collar pieces are separated from each other. It is characterized by a ridge between them. 4. The clamping device according to claim 1, wherein the split collar is hinged on one side and can be opened and closed on the other side. 5. The clamping device according to claim 1, wherein a pair of clamps has a circumferential groove formed in an inner surface of the pair of clamps for receiving an elastic filament. thing. 6. The clamping device according to claim 1, wherein the elastic filament has a radius of curvature larger than the radius of curvature of the outer peripheral surface of the split collar. What to do. 7. A clamping device for a ridged electric wire for fastening a ridged electric wire via a three-part collar by a pair of hinged clamps, wherein the three ridges are combined in a cylindrical shape. An elastic filament that is longer than a half circumference of the outer peripheral surface of the split collar, and a connecting member that slidably supports the elastic filament, the three-piece collar has an inner peripheral surface with a projection of a wire with a ridge. A groove into which a stripe is formed is formed, and hinged so that two collar pieces can be opened and closed on both sides of one collar piece, and the elastic filaments are three in a state of being combined in a cylindrical shape. One end is fixed to the collar piece on one open / close end side of the three-piece collar, and the other end is fixed to the collar piece on the other open / close end side of the three-piece collar, with a gap between it and the outer peripheral surface of the split collar. The connecting member hinges the pair of clamps. A ridged wire clamp device supported by a shaft pin to be coupled.