JPS6149885B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a safe for overhead lines, which is used by being attached to a steel tower when extending power transmission and distribution lines between towers.

Conventionally, circular safes made of iron or aluminum alloy have been used for the construction and extension of power transmission and distribution lines.
In the case of steel towers with steep slopes such as in mountainous areas, the tension applied to the wires is large, causing damage to the surface of the wires and breakage of the strands, and in the case of ultra-high voltage power transmission lines, it can cause corona outbreaks, so please do not carry out wire-stretching work. To prevent this from happening, large-diameter safes are used, but they are heavy and difficult to transport and install and remove at high places, resulting in a defect that significantly reduces work efficiency.

The present invention has been made for the purpose of eliminating the above-mentioned defects, and an embodiment of the present invention will be described below with reference to the drawings. Reference numeral 2 denotes a number of rollers, such as cylindrical roller bearings, which are installed by inserting the central shaft 4 into holes arranged in rows in the arcuate parts of the frames 1 and 1 on both sides and tightening nuts. Rollers with a large diameter, such as a rolling bearing 3, are attached. Reference numeral 4 designates an endless rubber belt which is rotatably fitted onto the cylindrical rolling bearings 2 and 3 and has a wire guide groove 5 on its upper surface. Reference numerals 6 and 7 are side plates that constitute a hanging frame body attached to the frame type frames 1 and 1, and a top plate 8 fixed to one of the side plates 6 has a hook 9 fixed thereto for hanging it from a steel tower, and The electric wires W can be taken in and out by opening and closing an opening/closing plate 12 which has one end fixed to the top plate 8 with a bolt 10 and the other end attached to the side plate 7 via a hinge structure such as a hinge 11 so as to be openable and closable. . Although this embodiment shows an example in which cylindrical rolling bearings are used as the rollers 2 and 3, these may be simply rollers having a shaft-supported sleeve structure.

As described above, in the present invention, the rollers 2 and 3 are arranged in a row on the semicircular frames 1 and 1, and the endless rubber belt 4 on which the electric wire W is placed is rotatably fitted, and the electric wire W is placed on the belt. Since it is designed to run, the radius of curvature of the frame can be increased,
Moreover, since large-diameter rollers 3 are arranged at both ends of the rollers 2 arranged in a row on the frame, the rotation of the belt 4 is extremely smooth, and the wire stretching tension and surface pressure applied to the electric wire W are extremely small, so that the wire surface will not be damaged. Or, there is no risk of wire breakage. It is also lighter in weight than conventional circular metal wheels, making it easier to transport and attach and remove the steel tower, and has excellent effects such as significantly improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the gold wheel of the present invention;
FIG. 2 is a side view of the same, and FIG. 3 is an explanatory diagram showing the main parts. 1... Frame type frame, 2... Roller, 3... Large diameter roller,
4... Endless rubber belt, 5... Electric wire guide groove, 6
...Side plate of hanging frame body, 7... Side plate of hanging frame body, 8... Top plate, 9... Hook, 10... Bolt, 11... Hinge, 1
2...Opening/closing plate.

Claims (1)

[Claims] 1. A large number of rollers and rollers with a larger outer diameter than the others are arranged in rows at both ends of the arc part of the semicircular frame attached to the hanging frame, and an endless rubber belt having wire guide grooves is mounted on the rollers. A safe for overhead wires, characterized by being rotatably fitted.