JPH0112507Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a support metal fitting for a ground wire on a utility pole that supports a ground wire for a distribution line exhibiting a spear-hanging overhead wire.
Specifically, the present invention relates to a ground wire support fitting that allows the ground wire to face above the center of a plurality of electric wires installed in parallel even under the condition of being exposed.

Conventionally, the ground wire installed at the top of a utility pole for power distribution lines, which is commonly used, is simply installed on the end of a supporting member made of an angle or the like protruding from the top of the utility pole body, either directly or with an insulator interposed between them, or by installing a new one. is a ground line cap (conical cap) formed for beautification.
, and the extended ground wire is clamped to the clamp section placed on the top of the cap. That is, the construction of the ground wire to date has simply been to position it on the axis (directly above) of the utility pole body. For this reason,
In the case of pole installations that adopt the projecting erection method due to the influence of approaching buildings such as in urban areas, it is natural that the ground wire placed only above the wire body will cause problems in the arrangement of wires (for example, three-phase high-voltage wires). Since it does not face the upper center, a predetermined shielding angle cannot be obtained, and the shielding effect against lightning is weakened. Of course, there are some places where the angle material is simply shaped into a T-shape and the ground wire is extended horizontally, but this is a design that needs to be designed on a case-by-case basis, is cumbersome to manufacture, is not standardized, and has a poor appearance. It is bad and far from being a beautifying pillar.

The present invention was developed in view of the above circumstances, and focused on the fact that it would be of great benefit to those skilled in the art if a support metal fitting for ground wires with a simple structure and a freely selectable extension distance could be provided. be.

Hereinafter, the present invention will be described with reference to the drawings of embodiments.

1 is a split type tightening band 2 that is split into two parts around the base periphery.
It is a cap-type mounting seat which is equipped with the mounting seat 1.
A crushed flat mounting piece 5 formed at the lower end of the pipe-shaped support shaft 4 is fitted into a clevis-shaped support plate 3 protruding from the center of the upper part of the and 2, which becomes the positioning axis 6b.
It is fixed by inserting a shaft pin 6 such as a bolt. In this case, the support plate portion 3 is provided with a base hole 7 and an appropriate number of angle adjustment holes 8 in this arcuate edge.
Move the positioning shaft 6 to the desired position of the angle adjustment hole 8.
b (of course, the mounting piece 5 also has two holes). Reference numeral 9 denotes a holder having a ground wire clamp section 10 arranged above to be attached to a flat attachment piece 5' formed at the upper end of the support shaft 4;
A clevis-shaped receiving plate portion 1 protruding from the lower part of the
1, and fix it by inserting two shaft pins 12, which serve as a pivot shaft 12a and a positioning shaft 12b. Of course, this receiving plate part 11 also has a base shaft hole 13 and a plurality of angle adjustment holes 14, and the angle adjustment holes 14 are selected according to the inclination of the support shaft 4. Set in horizontal position. The entire connection combination of the holder 9, the support shaft 4, and the mounting seat 1 constitutes the ground wire support fitting 15.

To explain this function, first, when installing the ground wire 16, first place the cap-shaped mounting seat 1, which will become the base member of the support metal fitting 15, on the top of the utility pole 17 in a cap shape, and then cut the periphery of the mounting seat 1 into two parts. By attaching the tightening band 2 in the form of a band and tightening the tightening bolts 2a at both ends, the split groove 1a cut into the mounting seat 1 is narrowed and firmly fixed to the utility pole 17.

Here, the position of the ground wire clamp part 10 of the support metal fitting 15 is set so that it is directly above the central electric wire 20 of the group of electric wires 20 to be installed on the insulator 19 placed on the arm 18 installed on the utility pole 17 as a lance. (See Figure 4). That is, the support shaft 4, whose lower end is pivoted in advance to the support plate portion 3 of the mounting seat 1 with a pivot 6a, is tilted appropriately, and in this state, the angle adjustment hole 8 of the support plate portion 3 and the support shaft 4 are aligned. When the positioning shaft 6b is inserted through the matching portion of the fixing hole 21 of the mounting piece 5, the support shaft 4 is fixed at two points. Of course, the positions of the plurality of angle adjustment holes 8 are distributed so as to be located above the center of the interval between the electric wires 20 installed in the extended state.

Next, the holder 9 portion attached to the upper end of the support shaft 4 is fixed. In this case, the mounting piece 5 of the support shaft 4 is inserted into a predetermined angle adjustment hole 14 of the receiving plate portion 11 of the holder 9, which is arranged symmetrically with the angle adjustment hole 8 of the support plate portion 3 whose lower end is determined. ', and the positioning shaft 12b is inserted into the matching position and fixed. If such a method of fixing the holding body 9 is adopted, the ground wire clamp portion 1 provided on the upper part of the holding body 9
0 is necessarily installed in a horizontal position and does not interfere with the installation of the ground wire 16. After this, the ground wire 16 is held by removing the holding piece 10a of the ground wire clamp part 10, placing the ground wire 16 on it, and then putting the holding piece 10a on again and turning the tightening bolt 10b. . In addition, when there is a horizontal angle in the direction of the line and it is desired to swing the position of this ground wire clamp part 10 in the horizontal direction, the cap-shaped mounting seat 1 to the utility pole 17 may be used.
All you have to do is adjust the mounting position a little in advance.

The ground wire 16 constructed in this manner can be always positioned above the center of the wires 20 group, has a predetermined shielding angle, and exhibits a lightning shielding effect over the entire wire group 20 group.

As mentioned above, the ground wire-like support fitting for the utility pole of the present invention has a structure in which the support shaft, which is the intermediate member of the support fitting, is tiltable with respect to the cap-shaped mounting seat that attaches to the utility pole and the holder that grips the ground wire. As a result, even if the distribution line is installed as a pole, extending horizontally, the ground wire can always be placed directly above the center of the group of wires by setting the angle of the support shaft. A reliable shielding angle can be obtained. Moreover, the angle adjustment in this case can easily and reliably tilt the support shaft by simply selecting a large number of angle adjustment holes arranged in the support plate portion and the receiving plate portion that are fitted with the clevis. Of course, the arrangement of the angle adjustment holes is designed in advance according to the spacing between the electric wires that are stretched out. In addition, when the ground wire is arranged directly above the utility pole as in the conventional case, the support shaft may be fixed vertically facing upward (on the axis of the utility pole). Furthermore, since the supporting metal fitting of the present invention has an extremely simple skeletal structure consisting of a mounting seat, a supporting shaft, and a holding body, it looks good and can handle loads such as wind pressure, and it also meets the requirements for power distribution equipment poles. This has practical effects such as simplified workability and low cost.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a front view that can be separated, and FIG. 4 is an explanatory view showing the state of use. 1...Cap type mounting seat, 3...Support plate part, 4...Support shaft, 5, 5'...Mounting piece part, 6,
12... Axis pin, 8, 14... Angle adjustment hole, 9...
...Holding body, 10... Ground wire clamp section, 11... Receiving plate section.

Claims (1)

[Scope of utility model registration request] The mounting piece at the lower end of the support shaft is fixed at two points to a support plate with an angle adjustment hole formed on the top of a cap-shaped mounting seat that is attached to the top of a telephone pole, and the support shaft is tilted freely. A receiving plate part with an angle adjustment hole protruding from a holder with a ground wire clamp part arranged on the mounting piece at the upper end is fixed at two points, and this ground wire clamp part can be freely extended to the utility pole. Supporting metal fittings for ground wires on utility poles.