JPH0432458Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Industrial application field The present invention relates to a branch line cover for preventing plants from rolling up on the branch line of a utility pole, which is attached to the branch line in order to prevent plants such as vines from curling up on the branch line.

(2) Prior art and its problems It is known that climbing plants such as debris tend to wrap around branch lines installed on utility poles, especially utility poles installed in grasslands or mountains, and rise upwards over the branch lines. It is being

The vines that rise while wrapping around the branch line can reach the power line installed at the top of the utility pole beyond the top of the branch line, causing a ground fault or a short circuit of the power line by getting entangled between the wires. May cause. Therefore, there has been a demand for some kind of measure to prevent such ground faults and short circuit accidents, and various ideas have been made.

For example, in Japanese Patent Application Laid-open No. 59-72361,
Focusing on the fact that climbing plants have difficulty wrapping themselves around objects with a diameter of 12 cm or more,
The patent discloses a method for preventing vines from curling up by providing a hollow cylindrical body with an outer diameter of 12 cm or more in the middle of the branch line.

However, such a cylindrical body is fixed to the intermediate part of the branch line by tightening a fixing device provided inside the cylindrical body to the branch line extending inside the cylindrical body using a screw or the like. Because of the structure, the installation work is complicated and the manufacturing cost is high.

Similar devices are disclosed in JP-A No. 58-58373, Japanese Utility Model Application No. 57-129865, Japanese Utility Model Publication No. 59-23165, etc., but in all of these, the A common structure is that the fixture is tightened and fixed to the branch line with screws or screws, and the cylindrical body is thereby attached to the intermediate part of the branch line. Therefore, the above-mentioned disadvantages are that the installation work is complicated and the manufacturing cost is high due to the complicated structure.

(3) Purpose of the invention The purpose of the present invention is to overcome the drawbacks of the prior art as described above, to have a means for holding the branch line guard on the branch line by cooperating with the insulator of the branch line, and to have a simple structure and to provide a means for holding the branch line guard on the branch line. To provide a branch line cover for preventing plants from winding up, which is easy to attach.

(4) Structure and Effects of the Invention According to the present invention, a branch line cover for preventing plants from being rolled up is provided, which can be easily attached to a branch line by using an insulator in a branch line having an insulator. The branch line cover of the present invention includes a hollow cylindrical cover body and a hollow cylindrical housing part that is attached to the upper end of the cover body and into which an insulator can be inserted. A plurality of section-shaped flexible closing members are formed which extend inwardly and have a plurality of notches, and the closing members open in the direction in which the insulator is inserted, but close in the opposite direction to insert the insulator. It is characterized by being locked.

Normally, it is not appropriate to place a branch line cover to prevent plants from climbing up near the ground surface where vines are growing high, and it is preferable to place it in the middle or at the top of the branch line, but as mentioned above, With conventional mounting methods, it is often difficult to attach the branch line guard to the upper part of the branch line. The branch line cover of the present invention has the effect that attachment and fixation of the branch line cover to the branch line is significantly facilitated by actively utilizing the insulator located in the middle of the branch line.

(5) Embodiment Referring to FIG. 1, a branch line cover 1 which is an embodiment of the present invention is shown.

This branch line cover 1 includes a hollow cylindrical cover body 3, a connecting portion 5 provided at the upper end of the cover body for accommodating an insulator provided on the branch line inside and locking the branch line cover on the branch line. The alignment part 7 is provided at the lower end of the cover body 3 and positions the branch line cover in the radial direction with respect to the branch line.

As shown in FIG. 2, the cover body 3 has an approximately octagonal annular cross section, and has an opening 9 along its entire length in the longitudinal direction so that the branch wire can be housed inside from the side. It is formed. This opening 9 is closed by a conventional stopper 11 after receiving the branch line inside.

A pair of through holes 13 facing each other in the radial direction are provided near the upper end and the lower end of the cover body.
15 are formed, and locking protrusions (not shown) provided on the connecting portion 5 and matching portion 7 are respectively fitted into these through holes, and the corresponding connecting portion and matching portion are attached to the cover body. It is locked against.

As shown in FIG. 3, the connecting portion 5 is composed of a pair of approximately symmetrical connecting halves 5a and 5b.

Although only one half 5a is shown in FIG. 4, the half 5b also has a similar shape. The connecting half 5a includes a fitting part 17a having a peripheral shape that approximately matches half of the inner shape of the cover main body so as to be accommodated in the upper end of the cover main body, and this fitting part 17.
an insulator accommodating part 19a extending upward from a, and an insulator accommodating part 19a extending radially outward from the outer periphery of the fitting part as shown in the figure, near the adjacent part of the fitting part 17a and the accommodating part 19a. A semicircular shoulder portion 21a is formed. When the connecting portion 5a is inserted into the cover body, this shoulder portion 21a comes into contact with the upper edge of the cover body and prevents the connecting portion from sinking into the cover body.

The fitting part 17a is a hollow body having a semicircular cavity 23a, and the inner circumferential wall of this cavity 23a includes:
A semicircular reinforcing rib 25a is formed. Further, a cavity 23a is provided near the lower end of the fitting portion 17a.
A semicircular groove 27a surrounding the
is formed to reduce the overall weight of the connecting part and to provide radial elasticity to the fitting part.

Furthermore, fitting protrusions 29a and 31a are formed on the surfaces of both circumferential ends of the fitting part, and these protrusions fit into fitting recesses (not shown) formed at corresponding positions on the other connecting half 5b. ) to prevent relative movement between the two connecting halves.

A fitting protrusion 33a and a fitting lug 35a for connecting the two connecting halves 5a, 5b are formed near the circumferential end of the accommodating portion 19a. Similar fitting ears 35b and fitting projections 33b are formed on the connecting half 5b, and the corresponding projections 33a and ears 35b or the projections 33b and ears 35a fit into each other. To reliably connect the connecting halves 5a and 5b.

The upper ends of the accommodating portions 19a, 19b are substantially closed by closing members 37a, 37b, as shown in FIG. Closing members 37a, 37b
are the protrusions 33a, 33b or the ear-shaped parts 35a,
The accommodating portions 19a and 19b in which the accommodating portions 35b are formed are inclined downward from both ends in the circumferential direction toward the center, and have a substantially V-shape as shown in FIG. Further, near the center of the closing members 37a, 37b, notches 39a, 39b are formed which have a substantially cross shape when the two connecting halves 5a, 5b are connected, as shown in FIG. The extension dimension of the notch is made larger than the diameter of the insulator.

The dimensions of the accommodating part and the notch are appropriately determined according to the dimensions of the insulator to which it is applied.

By forming the notches 39a and 39b in the closing members 37a and 37b in this manner, when an object such as an insulator is pressed against the closing member from the direction of arrow A in FIG. 1, the closing member bends downward. , it becomes possible to insert objects such as insulators into the housing section. Furthermore, since the closing member is made of a relatively elastic material such as plastic, it will return to its original state once an object has passed through it, and even if the object is subsequently pulled back in the opposite direction of arrow A, ,
Since the closing member is inclined downward, it has a one-way passability that does not allow the object to pass through easily.

As shown in FIG. 5, the matching part 7 is formed of two halves 7a and 7b, similar to the connecting part 5, and has a fitting protrusion and a fitting recess that fit into each other when connected. It has locking parts 41 and 43 consisting of. When both halves are assembled as shown in Figure 5,
It is shaped to fit inside the cross section of the cover body shown in FIG. The upper portion 45 and the lower portion 47 of the matching portion are formed substantially symmetrically with respect to shoulders 49d and 49b. Extending from the outer surface of each half 7a, 7b are protrusions 51a, 51b that fit into the through holes 15 of the cover body 3.

Conductive holes 5 for inserting branch wires are provided on the upper and lower surfaces of the matching part 7 so as to be substantially aligned with each other.
3 and 55, and the branch line cover is positioned approximately at the center with respect to the branch line by these conduction holes and the insulator accommodated in the housing portion 5.

By forming the upper and lower parts of the matching part 7 almost symmetrically as described above, it is possible to increase the overall length of the branch line cover by adding more parts to the cover main body, if necessary. Become.

Next, the installation procedure of the branch line cover 1 of the present invention is explained in the sixth step.
This will be explained with reference to the figures.

As described above, the cover main body 3, the connecting portion 5, and the matching portion 7 that constitute the branch line cover are split into two or open at the sides. Therefore, it can be attached to branch lines 63 and 65 of an existing utility pole 61 shown in FIG.

When installing, first open the opening of the cover body 3 and insert the connecting part 5 assembled as shown in FIG.
A fitting protrusion (not shown) provided on 7a is fitted and fixed to the cover body. Then, the fifth
The matching part 7 assembled as shown in the figure is inserted into the lower end of the cover body, and the through hole 15 and the protrusions 51a, 51b are fitted. The branch line cover integrated in this manner is a component with two halves or open sides, and can be fitted onto the branch line.

Branch line cover 3 fitted into the branch line through the opening
Insert the stopper 11 into the opening 9 of the cover body 3.
will be closed.

The branch line cover assembled on the ground in this manner is shown in broken lines in FIG.

Finally, push the branch line cover up in the direction of arrow B from the position shown by the broken line in FIG. 6 to the position shown by the solid line in FIG. By this pushing-up operation, the insulator 69 is housed in the housing parts 19a and 19b,
Thereafter, due to the aforementioned unidirectionality of the closing members 37a and 37b, the branch line cover is fixed to the intermediate portion of the branch line while hanging from the insulator 69.

[Brief explanation of the drawing]

Fig. 1 is an elevational view showing a branch line cover according to an embodiment of the present invention, Fig. 2 is a cross-sectional view of the cover main body constituting the branch line cover, taken along the - line in Fig. 1, and Fig. 3 is a FIG. 4 is an elevational view showing one half of the connecting portion;
Figure 5 is a plan view of the matching part that constitutes the branch line cover;
FIG. 6 is an explanatory view showing the attached state of the branch line cover of the present invention. 1... Branch line cover, 3... Cover body, 5...
Connecting part, 7... Matching part, 63, 65... Branch line, 6
7,69...Insulator.

Claims (1)

[Scope of utility model registration request] This branch line cover is attached to branch lines 63 and 65 having insulators 67 and 69, and includes a hollow cylindrical cover body 3 and a connecting part 5 attached to the upper end of the cover body. The connecting portion is a hollow cylindrical housing portion 19 into which the insulators 67 and 69 can be inserted.
a, 19b, and the upper surface of the accommodating portion has a plurality of notches 39a, 3 extending radially from approximately the center.
9b, and a plurality of flexible closing members 37a, 37b that are inclined inward are formed.