JPH0417631Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a lightweight shackle for utility poles used primarily for overhead power distribution lines.

(b) Conventional technology When planting concrete utility poles along overhead power distribution lines, concrete shackle bodies 1 are tightened in a cross shape to the base of the utility poles 4 via U-shaped bolts 2 and nuts 3. As is well known, it is designed to be buried inside.

(c) Problems to be solved by the invention In order for the shackles body as mentioned above to reliably maintain the planted state of the utility pole, it is essential that it has a certain vertical cross-sectional area. The weight of the shackles itself is 70kg at the lowest. Therefore, transportation and construction required a great deal of labor and expense.

In order to correct this drawback, it was considered to use steel materials, but in this case, since the inside was hollow, the weight could be reduced, but the material was expensive. Therefore, it is not suitable, and there is a need for a lightweight and strong material to replace concrete.

(d) Measures to solve the problem The purpose of the above concrete shackle 1 is to support the installed state of the utility pole 4, and its length and cross-sectional area are defined in a shape based on predetermined values. Therefore, there is no suitable means to reduce the weight other than to change the material itself.

Therefore, if we consider making steel as the simplest method, first of all it would be quite expensive, and secondly, the weight would certainly be reduced, but at most it would only be 35 kg, which is about 50% of the weight of concrete shackles.

For these reasons, after considering effective means other than concrete and steel, we came up with a material that can be manufactured at a relatively low cost, has considerable strength, and is surprisingly lightweight. This is a paper core for panels known as JIS-A-6931.

This paper core panel is made of processed paper soaked with a synthetic resin solution and made to have a certain hardness, as shown in the plan view of FIG. 8 and the side view of FIG. is coated with polyester resin 11,
If the paper core panel is constructed to have a cross-sectional area similar to that of the concrete shackles 1, and the partial areas lacking in strength are reinforced with other reinforcing members, the purpose can be fully achieved.

(e) Effects and Examples An example of the implementation of the present invention will now be explained based on the drawings. As shown in the plan view of FIG. 3, the front view of FIG. 4, and the side view of FIG. The total length is longer than the diameter of the telephone pole by the required length, and on the rear surface of the center of the shackle 9, both sides are bent into inclined upward parts 8, 8. The receiving plate 7 is fixed, and coupling holes 6 are formed at predetermined positions at both ends of the reinforcing metal fitting.

Then, as shown in the plan view of FIG. 6 and the side view of FIG. Then, attach the U-shaped bolt 2 to the telephone pole 4,
The nuts 3 are connected to each other via washers 10 by penetrating through the connecting holes 6 at both ends of the reinforcing metal fittings 5 and the through holes bored in the lightweight shackles 9 at the portions corresponding to the connecting holes 6.

(f) Effects of the invention As mentioned above, even if the reinforcing metal fittings 5 integrated with the receiving plate 7 are added to the present invention, the weight of the lightweight shackles is only about 7 kg, which is an astonishing 10% of that of concrete shackles. Concrete shackles are also vulnerable to impact during transportation and handling, and since they are heavy objects, if a falling accident occurs, it not only poses a danger to workers, but also easily breaks, and can be dangerous to construction workers. In order to overcome defects such as causing lower back pain to workers, this invention does not cause any damage even if dropped from a high place due to the nature of the material and its light weight, and its light weight also improves work safety. Moreover, it is quick and convenient.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the relationship between a conventional utility pole 4 and a concrete shackle 1, and FIG. 2 is a side view of the same.
FIG. 3 is a plan view showing a state in which the reinforcing metal fitting 5 and the receiving plate 7 of the present invention are fixed and integrated, FIG. 4 is a front view, and FIG. 5 is a side view. Fig. 6 is a plan view showing the state in which the present invention is attached to the utility pole 4;
The figure is also a side view. FIG. 8 is a plan view illustrating the paper core panel, and FIG. 9 is a side view. 1... Concrete shackles, 2... U-shaped bolts,
3...Natsuto, 4...Telephone pole, 5...Reinforcement fittings, 7
...Socket plate, 9...Lightweight shackles, 10...Washers.

Claims (1)

[Scope of utility model registration request] A shackle 9 of a predetermined size is constructed from a panel paper core, a reinforcing metal fitting 5 is fitted in the center of the shading 9, and a receiving plate 7 is fixed to the reinforcing metal fitting 5.
is brought into close contact with the utility pole 4, and both ends of the U-shaped bolt 2 that embraces the base of the utility pole 4 are connected to the reinforcing metal fitting 5 and the shackle 9.
This light-weight under-shackle for a utility pole is characterized in that the under-shackle 9 is penetrated through the utility pole, the under-shackle 9 is tightened to the utility pole 4 by a washer 10 and a nut 3, and is buried in the soil.