JP6064219B2 - Jumper wire vibration suppression device - Google Patents

Description

  The present invention relates to a vibration suppression device that suppresses cracking and breakage of a jumper wire connecting optical fiber composite ground wires suspended by a retaining clamp on both sides of a steel tower.

  FIG. 2 shows a conventional jumper wire mounting configuration diagram. In FIGS. 2 a and 2 b, the retaining clamp 40 is suspended on both sides of the tower 50 by a retaining clamp suspension 70. The optical fiber composite ground wire 60 is held by the wedge portion 47 of the retention clamp and inserted into the retention clamp 40 so as to be suspended from the steel tower 50. The optical fiber composite ground wires 60 suspended on both sides are connected to each other by a jumper wire 65, and the jumper wire 65 is fixed to a jumper clamp portion 55 of the steel tower 50 by a clamp 30. In addition, the jumper wire on the steel tower in which the optical junction box (not shown) is arranged is arranged long for edge turning.

  In fixing to the jumper clamp portion 55, it is required to secure a bending radius of the jumper wire 65 of 500 mm or more for the purpose of reducing optical transmission loss. For this reason, the jumper wire 65 is installed easily affected by wind pressure. Since the optical fiber composite ground wire 60 is suspended symmetrically on both sides of the steel tower 50, only the right side of the steel tower 50 is shown in the figure.

  FIG. 3 is a cross-sectional view showing an example of a jumper wire structure. The jumper wire 65 has a grooved aluminum wire 67 at the center in the aluminum tube 66, and a collective optical fiber 68 is inserted into the groove. In FIG. 2 again, the optical fiber composite ground wire 60 installed on the steel tower 50 vibrates up and down and left and right by the wind as indicated by arrows. This vibration reaches the jumper wire 65, and the jumper wire 65 vibrates similarly. Further, the jumper wire 65 itself vibrates due to the wind pressure. In particular, on the steel tower on which the optical junction box is arranged, the jumper wires are arranged at a long distance corresponding to the edge, so that the wind pressure is easily received.

  When this vibration is repeated over a long period of time and a resonance phenomenon occurs, a large strain is generated at the boundary (marked with ☆) between the wedge portion 47 of the retention clamp and the jumper wire 65 held by the clamp 30 of the jumper clamp portion 55. Stress concentrates and the aluminum pipe 66 is cracked. When this occurs repeatedly, both the aluminum tube 66 and the grooved aluminum wire 67 break. Along with the cracks and breaks, the collective optical fiber 68 is disconnected and communication is disabled.

  Patent Document 1 discloses a suspended jumper device in which power lines having a horizontal angle that are fastened to a tower arm via a tension insulator are electrically connected by a jumper line. A long rigid pipe is suspended through the pipe, and both ends of the rigid pipe are bent toward the tower arm side, and jumper wires are fixed along the rigid pipe. The rigid pipe is a single pipe member. There is a description that it may be configured by combining a horizontal pipe and bent pipes provided at both ends of the horizontal pipe.

JP 2009-27822 A

  The present invention has been made to solve such problems, and its purpose is to suppress cracking and breakage of the jumper wire connecting the optical fiber composite ground wire suspended by the retaining clamps on both sides of the steel tower. A vibration suppression device is provided.

The jumper wire vibration suppression device of the present invention is a jumper wire vibration suppression device for connecting an optical fiber composite ground wire suspended by a retaining clamp on both sides of a steel tower, and includes an aluminum covered steel stranded wire and an aluminum covered steel It has an aluminum-covered steel stranded wire terminal that is compression-connected to both ends of the stranded wire, and a plurality of clamps that hold the aluminum-covered steel stranded wire and jumper wires. The clamp that is fixed to the plate and holds the aluminum-covered steel stranded wire and the jumper wire near the center of the aluminum-covered steel stranded wire is fixed to the steel tower, and the jumper wire is fixed to the steel tower by multiple clamps. that the jumper clamp and anchor clamp connecting plate and an aluminum covering the steel strand having a stiffness that is fixed to, is fixed along the shape, the aluminum clad steel strands, shape is maintained by the stiffness In this state, it is fixed to the jumper clamp and the tension clamp connecting plate, and when the jumper wire is fixed, its shape is maintained, and the tension clamp has a wedge portion for holding the jumper wire, The wire terminal is fixed to the holding clamp connecting plate at a position near the wedge portion, and the plurality of clamps hold the jumper wire and the aluminum-covered steel stranded wire in a state where the space is maintained. It is characterized by being equal to the interval between the covered steel stranded wire terminal and the wedge portion .
The aluminum-covered steel stranded wire of the jumper wire vibration suppression device of the present invention is characterized by suppressing vibration generated in the jumper wire by its rigidity.

  ADVANTAGE OF THE INVENTION According to this invention, the vibration suppression apparatus which suppresses the crack of the jumper wire which connects the optical fiber composite overhead ground wire suspended by the retention clamp on both sides of the steel tower, and a fracture | rupture can be provided.

FIG. 3 is a diagram illustrating the installation configuration of a jumper wire vibration suppression device according to the present invention. The conventional jumper wire mounting configuration diagram. Sectional drawing which shows the structural example of a jumper wire.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view showing a mounting configuration of a jumper wire vibration suppressing device according to the present invention. In FIG. 1, since it is the same as that of FIG. 2 except the part of the aluminum covering steel strand wire 10 and the jumper wire 65, description is abbreviate | omitted. Similarly to FIG. 2, the optical fiber composite ground wire 60 is symmetrically suspended on both sides of the steel tower 50, so that only the right side is shown.

  An aluminum-covered steel stranded wire terminal 20 is compression-connected to both ends of the aluminum-covered steel stranded wire 10 and is fixed to a retention clamp coupling plate 45 of the retention clamp 40. The aluminum-covered steel stranded wire 10 and the jumper wire 65 are held by a plurality of clamps 30, and the clamp 30 near the center of the aluminum-covered steel stranded wire 10 is fixed to the jumper clamp portion 55 of the steel tower 50.

  Also in FIG. 1, as in the case of FIG. 2, the optical fiber composite ground wire 60 vibrates up and down, left and right by wind, and this vibration reaches the jumper wire 65 and the jumper wire 65 vibrates in the same manner. Further, the jumper wire 65 itself vibrates due to the wind pressure.

  However, the jumper wire 65 attached with a bending radius of 500 mm or more is fixed to the rigid aluminum covered steel stranded wire 10 fixed to the tension clamp connecting plate 45 of the tension clamp 40 via a plurality of clamps 30. . For this reason, the vibration which generate | occur | produced conventionally is suppressed and generation | occurrence | production of resonance is also prevented. Further, the strain stress applied to the boundary between the wedge portion 47 of the retention clamp and the jumper wire 65 held by the clamp 30 of the jumper clamp portion 55 is similarly reduced. For this reason, the jumper wire 65 is prevented from cracking and breaking, and the disconnection of the collective optical fiber 68 can be eliminated.

  As described above, according to the present invention, it is possible to provide a vibration suppression device that suppresses cracks and breaks in jumper wires connecting optical fiber composite ground wires suspended by a retaining clamp on both sides of a steel tower.

10 Aluminum Clad Steel Stranded Wire 20 Aluminum Clad Steel Stranded Wire Terminal 30 Clamp 40 Drain Clamp 45 Drain Clamp Connecting Plate 47 Drain Clamp Wedge 50 Steel Tower 55 Jumper Clamp 60 Fiber Optic Overhead Ground Wire 65 Jumper Wire 66 Aluminum Tube 67 Groove Attached aluminum wire 68 Collective optical fiber 70 Suspension clamp suspension 100 Cutting apparatus of the present invention

Claims (2)

A jumper wire vibration suppression device for connecting an optical fiber composite ground wire suspended by a retaining clamp on both sides of a steel tower,
An aluminum-covered steel stranded wire, an aluminum-covered steel stranded wire terminal compressed and connected to both ends of the aluminum-covered steel stranded wire, and a plurality of clamps for holding the aluminum-covered steel stranded wire and the jumper wire,
The aluminum covered steel stranded wire terminal is fixed to a retention clamp connecting plate of the retention clamp, and the clamp holding the aluminum covered steel stranded wire and the jumper wire in the vicinity of the center of the aluminum covered steel stranded wire, the steel tower Fixed to
The jumper wire is clamped by the plurality of clamps and fixed to the aluminum-covered steel stranded wire having rigidity to be fixed to the jumper clamp fixed to the tower and the retention clamp connecting plate along the shape thereof. It is,
The aluminum-covered steel stranded wire is fixed to the jumper clamp and the tension clamp connecting plate in a state where the shape is maintained by its rigidity, and when the jumper wire is fixed, the shape is maintained,
The tension clamp has a wedge portion for gripping the jumper wire,
The aluminum-covered steel stranded wire terminal is fixed to the retaining clamp connecting plate at a position near the wedge portion,
The plurality of clamps hold the jumper wire and the aluminum-covered steel stranded wire in a state of maintaining a gap,
The jumper wire vibration suppressing device , wherein the distance is equal to the distance between the aluminum-covered steel stranded wire terminal and the wedge portion .   The vibration suppressing device according to claim 1, wherein the aluminum-covered steel stranded wire suppresses vibration generated in the jumper wire by its rigidity.

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