JPS5845444Y2 - fishing trolley for overhead wires - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a trolley for overhead lines used when extending and installing AC8R type overhead power transmission lines and the like.

As is well known, in the work of extending AC8R type overhead power lines, etc., the wires to be stretched are pulled by mensenger wire (steel rope) that is placed on a fishing wheel. In order to reduce the contact friction between the twisted steel wires and ensure sufficient flexibility of the rope as a whole, this wire indexing wire is made of steel for the purpose of folding and rust prevention. Grease (high viscosity or semi-solid oil) is applied to the inside of the stranded wire up to the central strand, so when the wire is passed over the fishing wheel, the grease will cause the fishing to occur due to its viscosity. A lump of grease adheres to the circumferential surface of the outer circumferential groove of the car sheave, and further adheres to the circumferential surface of the outer circumferential groove of the fishing sheave when the following power transmission line is being towed and passes over the fishing sheave. The particles adhered and transferred to the surface of the stranded wires in the form of lumps.

In this condition, in a twisted power transmission line, there is a lump of grease attached to the surface of the wire, and as a result of various types of dust etc. adhering to the grease lump, the potential gradient of the surface of the wire changes at that part. This causes audible noise (9 audible noise) associated with corona discharge.
was to occur.

The purpose of this invention is to provide a fishing trolley for striated overhead lines that does not cause the above-mentioned drawbacks to power transmission lines that are installed by passing over the fishing trolley. .

Next, this invention will be explained in detail using illustrated examples.

FIGS. 1 and 2 show a first embodiment of this invention, including a pair of vertical side plates 5A, 5B facing each other and spaced apart from each other, and these side plates 5A, 5B.
A frame body 3 is formed by a horizontal bottom plate 6 connecting the lower ends of the two side plates 5A and 5B, and a hook 8 is fixed to the upper ends of the left side plates 5A and 5B via a mounting seat plate 7, and an upper part of one side plate 5A. is partially cut out, and an opening/closing lid 9 for putting in and taking out the striatum is attached to this part, and a horizontal shaft 10 penetrating and fixed between both side plates 5A and 5B has an outer circumferential groove 1 for holding the striatum. A sheave 2 is rotatably supported.

On the upper surface of the horizontal bottom plate 6 of the frame 3, there is a sheave 2
A protruding tongue 4 having a convex arcuate outer surface 11 matching the groove shape of the outer circumferential groove 1 is provided in a protruding manner, and the protruding tongue 4 and the outer circumferential groove 1 are arranged to face each other so as to be in substantially sliding contact with each other.

FIG. 3 shows a second embodiment of this invention, in which a bifurcated auxiliary frame 3' that is inclined at the horizontal axis 10 of the frame 3 and extends downward and forward and backward is installed. A raised tongue piece 4 is provided in a protruding manner on the upper surface of each bottom plate C of the fixed and auxiliary frame body 3'. However, the other configurations are the same as those of the first embodiment.

According to this invention, the convex raised tongue piece 4 that matches the outer circumferential groove 1 of the sheave 2 that guides the wire is disposed in substantially sliding contact with the outer circumferential groove 1 of the sheave 2. Even if a grease lump of the mesosenger wire adheres to the outer circumferential groove 1 of the sheave 2, it can be immediately removed from the outer circumferential groove 1 by the raised tongue piece 4. This provides the effect of reliably preventing grease lumps that cause corona noise from adhering to the wire conductor.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a catenary fishing wheel according to the first embodiment of this invention, Fig. 2 is a partially cutaway side view of Fig. FIG. 2 is a partially cutaway side view of the vehicle. In the figure, 1 is an outer circumferential groove, 2 is a sheave, 3 is a frame body, and 4 is a raised tongue piece.

Claims (1)

[Scope of utility model registration request] For a fishing wheel in which a seam 2° having an outer circumferential groove 1 for engagement with a filament body is rotatably supported on a frame body 3, a convex raised tongue that matches the outer circumferential groove 1 is provided on the frame body 3 side. A fishing wheel for an overhead line, characterized in that a piece 4 is provided, and the raised tongue piece 4 is arranged to face the outer circumferential groove 1 in a substantially sliding contact state.