Utility pole

Abstract

The purpose of the present disclosure is to reduce the weight of a utility pole.　The present disclosure provides a utility pole characterized by being constituted from an organic material, wherein part of the side surface of a cylindrical trapezoid having a narrow upper part and a wide lower part is provided with a plurality of holes formed running through the side surface between the exterior and the interior space.

Description

Technical Field

[0001] The present disclosure relates to lightweight utility poles.

Background Art

[0002] In Japan, a large number of utility poles are erected. They are erected beside the tracks (FIG. 1) to supply power to trains running on railways and on the roads (FIG. 2) to provide power and communication to customers' homes. In FIGS. 1 and 2, 10 is a utility pole, 11 is a communication cable, and 12 is a power cable. The number of utility poles erected in Japan is over 30 million. Furthermore, about 50,000 to 100,000 new utility poles are erected every year.

[0003] With the aging of utility pole erection workers and the decline in population, the number of workers is decreasing. Since utility poles will still need to be erected in the future, efficient pole erection technology is required.

[0004] Describe the structure of the standard utility poles currently in use. The materials are made of concrete and steel. Since they are installed outdoors, the same materials as those of structures such as buildings are used. Steel is assembled into a cylindrical shape, and while centrifuging, concrete is poured in to make the center of the utility pole hollow (see, for example, Non-Patent Documents 1 and 2). A cross-section perpendicular to the long axis direction of the utility pole is shown in FIG. 3. In FIG. 3, 11 is a steel wire, 12 is concrete, and 13 is a hollow. The steel wire 11 is covered with concrete 12 around it, and the center part is a hollow 13.

Prior Art Documents

Non-Patent Documents

[0005]

Non-Patent Document 1

Non-Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] Since the utility pole is a composite of concrete and steel, the weight of a single pole exceeds 1 ton. Also, the depth of the hole dug when installing the utility pole may exceed 2 m, and a utility pole with a length of 10 m or more is installed in that hole. For the workers, they have to accurately insert a heavy and long structure into the hole. Precise work is required to install the utility pole vertically. When installing the utility pole, it is transported to the construction site by vehicle. A crane is used to lift the utility pole from the vehicle and move it to the hole. Also, while the workers are carrying out the construction, they communicate with the operator who controls the crane to accurately insert it into the hole.

[0007] What makes the pole installation difficult is the weight of the utility pole. Because the utility pole is heavy, a large crane has to be used.

[0008] Therefore, in order to solve the above problems, the present disclosure aims to reduce the weight of the utility pole.

Means for Solving the Problems

[0009] In order to solve the above problems, the utility pole is made of lightweight materials, and a plurality of holes penetrating between the outside and the internal space of the utility pole are provided.

[0010] Specifically, the present disclosure is composed of organic materials, and a plurality of holes penetrating between the outside and the internal space are provided in a part of the side surface of a frustum of a cone with a thin upper part and a thick lower part. A utility pole characterized by this is provided.

[0011] Also, the utility pole of the present disclosure the plurality of holes are provided in the upper part It is characterized by the following.

[0012] In addition, the utility pole of the present disclosure has a higher area density of the plurality of holes in the upper part than in the lower part It is characterized by the following.

[0013] In addition, the utility pole of the present disclosure the number per area of the plurality of holes is constant, and the size of the plurality of holes is larger in the upper part than in the lower part It is characterized by the following.

[0014] In addition, the utility pole of the present disclosure the size of the plurality of holes is constant, and the number per area of the plurality of holes is larger in the upper part than in the lower part It is characterized by the following.

[0015] In addition, the utility pole of the present disclosure a part of the holes in the upper part are circular It is characterized by the following.

[0016] In addition, the utility pole of the present disclosure a part of the holes in the upper part are circular with at least two or more sizes It is characterized by the following.

Advantages of the Invention

[0017] According to the present disclosure, the utility pole can be lightened.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5A

Figure 5B

Figure 5C

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0019] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below. These examples are merely illustrative, and the present disclosure can be implemented in various modified and improved forms based on the knowledge of those skilled in the art. In this specification and the drawings, components with the same reference numerals indicate the same components as each other.

[0020] (Embodiment 1) The schematic structure of the utility pole of the present disclosure as viewed from the side is shown in FIG. 4. In FIG. 4, 10 represents the utility pole and 15 represents the holes. The upper part of the utility pole 10 is thin and the lower part is thick, having a tapered shape of a frustum of a cone. A plurality of holes penetrating between the external and internal spaces are provided in at least a part of the side surface. A plurality of holes may be provided throughout the side surface. By providing a plurality of holes, the weight of the utility pole can be reduced. Further, if the utility pole is made of an organic material, the weight can be further reduced compared to the conventional concrete poles. Examples of the organic material include plastics. If it is an organic material such as plastic, injection molding can also be performed, so the processability is better than that of concrete utility poles.

[0021] Examples of the shape of the holes include round, square, rectangular, oblong, oval, hexagonal, cross-shaped, and combinations thereof. Examples of the arrangement of a plurality of holes are shown in FIGS. 5A, 5B, and 5C. FIGS. 5A, 5B, and 5C show a parallel arrangement (FIG. 5A), a 60-degree staggered arrangement (FIG. 5B), and a 45-degree staggered arrangement (FIG. 5C), respectively, with the shape of the holes being round as an example. The shape and arrangement of the holes are examples and are not limited thereto.

[0022] (Embodiment 2) Preferably, a plurality of holes are provided at the upper part of the utility pole. As shown in FIG. 4, no holes are provided at the lower part of the utility pole, and a plurality of holes are provided at the upper part of the utility pole. FIG. 6 shows a state where the utility pole is installed on the ground. In FIG. 6, 10 is the utility pole and 15 is the hole. In FIG. 6, a hole is dug in the ground and the lower part of the utility pole is buried in the hole.

[0023] By not providing a plurality of holes at the lower part, it is possible to prevent the soil on the ground from entering the holes. If the soil on the ground enters the holes, it may cause the utility pole to wobble.

[0024] Preferably, the holes are provided at the upper part of the utility pole so as to avoid the reach of a person's hand after the utility pole is erected. If there are holes within the reach of a person's hand, it is inappropriate in terms of hygiene and safety.

[0025] (Embodiment 3) Looking at the current structure of the utility pole, the thickness is different between the upper part and the lower part, and the upper part is thinner. In order to keep the strength constant, it is made thinner closer to the upper part. In the utility pole of the present disclosure, it is preferable that the area density of a plurality of holes is higher in the upper part than in the lower part. FIG. 7 shows a schematic structure of the utility pole of the present disclosure as viewed from the side. As shown in FIG. 7, since the area density of a plurality of holes is lower in the lower part, the strength is higher in the lower part.

[0026] In order to increase the area density towards the upper part of the utility pole, for example, when the number per unit area of a plurality of holes is constant, the size of the holes is made larger towards the upper part than in the lower part. When the size of the holes is constant, the number of holes is increased towards the upper part than in the lower part.

[0027] If the area density is increased towards the upper part of the utility pole, it becomes easier to release the wind pressure applied to the utility pole against strong winds. As the wind pressure decreases, a thinner utility pole can be used, so that the number of members can be reduced and the utility pole can be made lighter.

[0028] (Embodiment 4) Fig. 8 shows the state of suspending a cable on a current utility pole. In Fig. 8, 10 is the utility pole, 14 is the hardware, and 21 is the communication cable. To suspend a cable on the utility pole, the hardware 14 is installed on the utility pole 10, and the communication cable 21 is fixed to the hardware 14 to suspend the communication cable.

[0029] Make some of the holes at the upper part of the utility pole circular. For example, make the shape of the hole provided at the position where the communication cable 21 is wired on the utility pole circular. Fig. 9 shows a schematic structure of the utility pole of the present disclosure as viewed from the side. In Fig. 9, 16 is the circular hole. Since the shapes of the communication cable and the power cable Cross-section are circular, the shape of the hole is also made circular to match the shape. The communication cable and the power cable are passed through this hole to suspend the communication cable and the power cable. As a result, the hardware as shown in Fig. 8 can be made unnecessary.

[0030] The thicknesses of the communication cable and the power cable vary depending on the application. By preparing two or more types of sizes of the holes provided at the upper part of the utility pole, various types of cables can be suspended on the same utility pole.

[0031] As described above, the present disclosure can reduce the weight of the utility pole.

Industrial Applicability

[0032] The present disclosure can be applied to the communication industry.

Explanation of Reference Numerals

[0033] 10: Utility pole 11: Steel wire 12: Concrete 13: Cavity 14: Hardware 15: Hole 16: Circular hole 21: Communication cable 22: Power cable

Claims

1. It is composed of organic materials, A plurality of holes penetrating between the outside and the internal space are provided in a part of the side surface of a frustum of a cone with a thin upper part and a thick lower part, The utility model relates to a utility pole, wherein the area density of the plurality of holes is higher in the upper part than in the lower part.

2. The number per area of the plurality of holes is constant, and the size of the plurality of holes is larger in the upper part than in the lower part. The utility pole according to claim 1, characterized in that.

3. The size of the plurality of holes is constant, and the number per area of the plurality of holes is larger in the upper part than in the lower part. The utility pole according to claim 1, characterized in that.

4. Some of the holes in the upper part are circular. The utility pole according to any one of claims 1 to 3, characterized in that.

5. Some of the holes in the upper part are circular with at least two or more sizes. The utility pole according to claim 4, characterized in that.

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