Cable support hardware

Abstract

To provide cable support hardware that enables a simultaneous work of both the installation of utility poles and the installation of an overhead cable, thereby making it easier to safely carry out work on the utility pole and the overhead cable in a short time.SOLUTION: Cable support hardware 3 attached to a utility pole 1 to support an overhead cable 2 includes a pulley structure 6 capable of guiding the overhead cable 2.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a cable support hardware. [Background technology]

[0002] The majority of outdoor telecommunications facilities are comprised of utility poles and cables such as optical and metal cables. Cables are supported by cable support hardware on each utility pole to maintain a certain height so as not to impede the passage of vehicles, pedestrians, and other traffic or work. It is said that the number of utility poles deployed in Japan, including those operated by telecommunications companies, electric power companies, and local governments, is more than 35 million (see Non-Patent Document 1). Furthermore, new utility poles are being constructed each year, increasing the number by approximately 50,000 to 100,000, due to the development of new residential areas and roads. When new utility poles are constructed, communication cables that provide communication services are often also installed.

[0003] Focusing on the workers involved in utility pole and cable construction, the trend is one of aging and shrinking, just as Japan's working population is aging and shrinking. In addition, utility poles can be long and heavy, and construction often takes place in environments with obstacles such as houses and pedestrian and vehicular traffic. Therefore, construction requires a large number of workers for safety reasons. Furthermore, overhead cables, such as those mentioned above, typically have a hard outer sheath and steel wire support, making them difficult to handle. Fixing them to utility poles requires high-altitude work, performed several meters above ground. Working with overhead cables also poses risks, such as falling objects and workers falling. Because the skills required for utility pole and overhead cable construction are different, different workers with specialized skills are responsible for each task. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] Ministry of Land, Infrastructure, Transport and Tourism, "Trends in the Number of Utility Poles," [Retrieved March 31, 2022], Internet<URL:https: / / www.mlit.go.jp / road / road / traffic / chicyuka / chi_13_03.html> Summary of the Invention [Problem to be solved by the invention]

[0005] Given the circumstances described above, it is expected that utility poles and overhead cables will continue to be erected every year, and considering the need to replace and remove currently constructed utility poles and overhead cables in the future, there is a need to carry out construction work efficiently and safely with a small number of workers.

[0006] Therefore, the object of the present disclosure is to provide a cable support hardware that enables the simultaneous installation of both utility poles and overhead cables, thereby making it easier to safely carry out construction work on utility poles and overhead cables in a short amount of time. [Means for solving the problem]

[0007] One aspect of the present disclosure is as follows.

[0008] [1] A cable support hardware that is attached to a utility pole and supports an overhead cable, A pulley structure capable of guiding the overhead cable is provided. death, the pulley structure comprises a front member, a rear member disposed closer to the utility pole than the front member, a first pulley rotatable around a first rotation axis passing through the front member and the rear member, a second pulley rotatable around a second rotation axis passing through the front member and the rear member, and a cable guide portion formed by the front member, the rear member, an outer peripheral surface of the first pulley, and an outer peripheral surface of the second pulley so as to be able to guide the overhead cable, the front member and the back member each have a first through-portion and a second through-portion; a first bolt can pass through the first through-portions of the front member and the rear member, a second bolt can pass through the second through-portions of the front member and the rear member, the first pulley has a ring shape through which the first bolt is passed, the second pulley has a ring shape through which the second bolt is passed, The cable support metal fitting has a first cylindrical body and a second cylindrical body, the first bolt can pass through the first through-portions of the front member and the back member and the first cylindrical body disposed therebetween, the second bolt can pass through the second through-portions of the front member and the back member and the second cylindrical body disposed therebetween, the first pulley has a smaller thickness than the first cylindrical body and is annular and passes through the first cylindrical body; The second pulley has a smaller thickness than the second cylindrical body and is annular and passes through the second cylindrical body. Cable support hardware.

[0009] [2] The back member has a back portion, bent portions on both sides of the back portion that bend toward the utility pole, and side portions that are connected to the back portion via the bent portions. [1] Cable support hardware.

[0010] [3] [1] or [2]. From a closed state in which the first bolt passes through the first through-portions of the front member and the rear member and the second bolt passes through the second through-portions of the front member and the rear member, the front member can be rotated around the first bolt relative to the rear member to change to an open state in which the cable guide portion is open to the front side. The cable support hardware described in

[0011] [4] The front member can be moved from the closed state to the open state by translating the front member relative to the back member and then rotating the front member around the first bolt. [3] Cable support hardware.

[0012] [5] [3] or [4], wherein the second pulley is disposed above the first pulley. The cable support hardware described in

[0013] [6] A cable support hardware that is attached to a utility pole and supports an overhead cable, a pulley structure capable of guiding the overhead cable; the pulley structure comprises a front member, a rear member disposed closer to the utility pole than the front member, a first pulley rotatable around a first rotation axis passing through the front member and the rear member, a second pulley rotatable around a second rotation axis passing through the front member and the rear member, and a cable guide portion formed by the front member, the rear member, an outer peripheral surface of the first pulley, and an outer peripheral surface of the second pulley so as to be able to guide the overhead cable, the front member and the back member each have a first through-portion and a second through-portion; a first bolt can pass through the first through-portions of the front member and the rear member, a second bolt can pass through the second through-portions of the front member and the rear member, the first pulley has a ring shape through which the first bolt is passed, the second pulley has a ring shape through which the second bolt is passed, From a closed state in which the first bolt passes through the first through-portions of the front member and the rear member and the second bolt passes through the second through-portions of the front member and the rear member, the front member can be rotated around the first bolt relative to the rear member to bring the cable guide portion into an open state in which it is opened to the front side, From the closed state, the front member is translated relative to the rear member and then rotated around the first bolt to thereby achieve the open state. Cable support hardware.

[0014] [7] A cable support hardware that is attached to a utility pole and supports an overhead cable, a pulley structure capable of guiding the overhead cable; the pulley structure comprises a front member, a rear member disposed closer to the utility pole than the front member, a first pulley rotatable around a first rotation axis passing through the front member and the rear member, a second pulley rotatable around a second rotation axis passing through the front member and the rear member, and a cable guide portion formed by the front member, the rear member, an outer peripheral surface of the first pulley, and an outer peripheral surface of the second pulley so as to be able to guide the overhead cable, the front member and the back member each have a first through-portion and a second through-portion; a first bolt can pass through the first through-portions of the front member and the rear member, a second bolt can pass through the second through-portions of the front member and the rear member, the first pulley has a ring shape through which the first bolt is passed, the second pulley has a ring shape through which the second bolt is passed, From a closed state in which the first bolt passes through the first through-portions of the front member and the rear member and the second bolt passes through the second through-portions of the front member and the rear member, the front member can be rotated around the first bolt relative to the rear member to bring the cable guide portion into an open state in which it is opened to the front side, The second pulley is disposed above the first pulley. Cable support hardware. [Effects of the Invention]

[0016] According to the present disclosure, it is possible to provide a cable support hardware that enables the simultaneous installation of both utility poles and overhead cables, thereby facilitating the safe and efficient construction of utility poles and overhead cables in a short period of time. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 10 is a side view showing the installation state of a utility pole and an overhead cable in a reference example. [Figure 2] FIG. 2 is a detailed view of part A in FIG. [Figure 3] (a) is a detailed view of part B in FIG. 1, and (b) is a cable support metal fitting that can be used in place of the cable support metal fitting shown in (a). [Figure 4] (a) shows the first step for installing utility poles and overhead cables in the reference example, (b) shows the second step, (c) shows the third step, (d) shows the fourth step, (e) shows the fifth step, and (f) shows the sixth step. [Figure 5] FIG. 2 is a perspective view of one embodiment of a cable support bracket. [Figure 6] (a) is a front view of the cable support hardware shown in Figure 5, (b) is a rear view, (c) is a right side view, (d) is a left side view, (e) is a top view, and (f) is a bottom view. [Figure 7] FIG. 6 is a perspective view of the pulley structure shown in FIG. 5. [Figure 8] (a) is a front view of the pulley structure shown in Figure 7, (b) is a back view, (c) is a right side view, (d) is a left side view, (e) is a top view, and (f) is a bottom view. [Figure 9] (a) shows the first step for installing the utility pole and overhead cable in one embodiment, (b) shows the second step, (c) shows the third step, (d) shows the fourth step, (e) shows the fifth step, and (f) shows the sixth step. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0019] Before describing the embodiment, a reference example will be described first.

[0020] In this reference example, utility poles 1 and overhead cables 2 are installed as shown in Figure 1. That is, the overhead cable 2 is supported by a plurality of utility poles 1 arranged side by side at intervals, in a state in which it is strung between these utility poles 1. The overhead cable 2 has a communication cable 2a, such as an optical cable or a metal cable, and a steel wire 2b (messenger wire) that serves as a support for the communication cable 2a. The plurality of utility poles 1 have one or more intermediate poles 1b between two dead-end poles 1a, and the overhead cable 2 is strung between the two dead-end poles 1a via the one or more intermediate poles 1b. The overhead cable 2 is supported on each utility pole 1 by a cable support bracket 3 that is attached to the utility pole 1 and supports the overhead cable 2.

[0021] As shown in Figure 2, the steel wire 2b is fixed to the dead-end pole 1a by a cable support metal fitting 3 having a known band structure 4. Also, as shown in Figure 3(a), the steel wire 2b is fixed to each intermediate pole 1b by a cable support metal fitting 3 having a known cable clamping structure 5. Note that instead of the cable clamping structure in which the steel wire 2b is clamped between two plates 5a as shown in Figure 3(a), a cable support metal fitting 3 having a known cable clamping structure using an L-shaped bolt 5b as shown in Figure 3(b) may be used.

[0022] In this reference example, the utility pole 1 and the overhead cable 2 are installed in the procedure shown in Figs. 4(a) to 4(f).

[0023] The first step, shown in Figure 4(a), involves digging a hole for the pole. First, the location for constructing the new utility pole 1 is determined. After positioning, the pavement is broken up as necessary to expose the ground. Next, a hole for installing the utility pole 1 is excavated, but to avoid accidentally damaging buried pipes for electricity, gas, water, etc., a person carefully digs the hole by hand to a depth of about 1.5 m. Once manual digging has been completed to about 1.5 m and there is no longer any risk of damaging the buried pipes, heavy machinery such as a pole digger is used to dig the hole to the depth required to erect the utility pole 1.

[0024] The second step, shown in Figure 4(b), involves erecting the pole. To place the pole 1 in the excavated hole, a crane is used to lift it up, and for safety reasons, a person holds the pole 1 with a rope to prevent it from swinging while erecting it in the hole.

[0025] In the third step shown in Figure 4(c), backfilling is performed. The soil is compacted while filling the hole, and the constructed utility pole 1 is fixed to the ground.

[0026] In the fourth step shown in Figure 4(d), the overhead cable 2 is installed on the specified dead-end pole 1a. The overhead cable 2 wound around the cable drum is unwound to the required length and fixed at a certain height above the ground using cable support hardware 3. If an aerial work vehicle is available, the work is carried out using an aerial work vehicle, but in construction environments where vehicles cannot enter, the work is carried out using scaffolding bolts or ladders attached to the utility pole 1.

[0027] In the fifth step shown in Figure 4(e), the overhead cable 2 is installed on the intermediate poles 1b. As in the fourth step, a cable support bracket 3 is attached to each intermediate pole 1b at a certain height above the ground, and the overhead cable 2 is fixed in place. When fixed, tension is applied to the overhead cable 2 so that it can constantly maintain a predetermined height. The required number of intermediate poles 1b are installed using the above-mentioned first, second, third, and fifth steps.

[0028] In the sixth step shown in Figure 4(f), the overhead cable 2 is installed on the last dead-end pole 1a where the overhead cable 2 has been laid within the intended range. As in the previous steps, the overhead cable 2 is fixed to the utility pole 1 using the cable support hardware 3, and tension is applied to maintain a certain height above the ground. In addition, any excess length of the overhead cable 2 is handled as necessary.

[0029] In the above-mentioned reference example, although the use of heavy machinery reduces the labor required by workers, the construction procedures themselves are subdivided, and due to structural constraints of the existing facilities, the process must be carried out in order, making it difficult to significantly improve efficiency. In particular, in the installation work of the overhead cable 2, the use of known cable support hardware 3 requires high-altitude work on each utility pole 1, making it difficult to improve efficiency.

[0030] Therefore, in one embodiment of the present disclosure, as shown in Figures 5 and 6(a) to 6(f), a cable support metal fitting 3 is used that has a pulley structure 6 capable of guiding an overhead cable 2 (e.g., steel wires 2b), and is attached to a utility pole 1 to support the overhead cable 2. By using such a cable support metal fitting 3, the utility pole 1 can be installed with the overhead cable 2 supported and guidable by the pulley structure 6, which makes it possible to simultaneously perform both the installation of the utility pole 1 and the overhead cable 2, thereby facilitating the construction of the utility pole 1 and the overhead cable 2 safely and in a short amount of time.

[0031] More specifically, the cable support hardware 3 of this embodiment has a pulley structure 6 and a band structure 4 attached to the utility pole 1. Note that the cable support hardware 3 of this embodiment is not limited to a configuration having the band structure 4, and may be attached to the utility pole 1 by a structure other than the band structure 4.

[0032] 7 and 8(a) to 8(f), the pulley structure 6 includes a front member 7, a rear member 8 arranged closer to the utility pole 1 than the front member 7, a first pulley 9 rotatable about a first rotation axis O1 passing through the front member 7 and the rear member 8, a second pulley 10 rotatable about a second rotation axis O2 passing through the front member 7 and the rear member 8, and a cable guide unit 11 formed by the front member 7, the rear member 8, and an outer peripheral surface 9a of the first pulley 9 and an outer peripheral surface 10a of the second pulley 10 so as to be able to guide the overhead cable 2. The cable guide unit 11 allows the overhead cable 2 to be smoothly guided and held in the longitudinal direction of the overhead cable 2 by the rotation of the first pulley 9 and the second pulley 10 as necessary.

[0033] For convenience of explanation, the direction along the first axis of rotation O1 is also referred to as the axial direction or thickness direction. In this embodiment, the second axis of rotation O2 extends along the axial direction. Note that the second axis of rotation O2 is not limited to extending along the axial direction, and may extend at a slight incline with respect to the axial direction.

[0034] The front member 7 and the rear member 8 each have a first through-portion 12 and a second through-portion 13. The pulley structure 6 has a first bolt 14 that can pass through the first through-portion 12 of the front member 7 and the rear member 8, respectively, and a first nut 15 that can be threaded onto the first bolt 14. The band structure 4 has a second bolt 16 that can pass through the second through-portion 13 of the front member 7 and the rear member 8, respectively, and a second nut 17 that can be threaded onto the second bolt 16. The first pulley 9 is annular, through which the first bolt 14 is threaded, and the second pulley 10 is annular, through which the second bolt 16 is threaded. A first axis of rotation O1 is defined by the central axis of the first bolt 14, and a second axis of rotation O2 is defined by the central axis of the second bolt 16.

[0035] More specifically, the pulley structure 6 has a first cylindrical body 18 having, for example, a cylindrical shape and a second cylindrical body 19 having, for example, a cylindrical shape; the first bolt 14 can pass through the first through-portions 12 of the front member 7 and the rear member 8 and the first cylindrical body 18 disposed therebetween; the second bolt 16 can pass through the second through-portions 13 of the front member 7 and the rear member 8 and the second cylindrical body 19 disposed therebetween; the first pulley 9 has a thickness smaller than the first cylindrical body 18 and is formed in, for example, a disk-shaped ring shape that is passed through the first cylindrical body 18; and the second pulley 10 has a thickness smaller than the second cylindrical body 19 and is formed in, for example, a disk-shaped ring shape that is passed through the second cylindrical body 19. Note that the first cylindrical body 18 may have a cylindrical shape other than a cylindrical shape. The second cylindrical body 19 may have a cylindrical shape other than a cylindrical shape. The first pulley 9 may have a ring shape other than a disk-shaped shape. The second pulley 10 may have an annular shape other than a disk shape.

[0036] Therefore, the first bolt 14 and the first nut 15 can press and fix the front member 7 and the rear member 8 to the first cylindrical body 18 in the thickness direction, and the thickness of the first cylindrical body 18 can rotatably hold the first pulley 9. Furthermore, the second bolt 16 and the second nut 17 can press and fix the front member 7 and the rear member 8 to the second cylindrical body 19 in the thickness direction, and the thickness of the second cylindrical body 19 can rotatably hold the second pulley 10. Note that the pulley structure 6 is not limited to a configuration having the first cylindrical body 18 and the second cylindrical body 19.

[0037] The back member 8 has a back portion 8a, bent portions 8b on both sides of the back portion 8a that bend toward the utility pole 1, and side portions 8c that connect to the back portion 8a via the bent portions 8b. The back portion 8a is a planar plate having a thickness in the thickness direction. The bent portions 8b are provided only at the lower end portions of both sides of the back portion 8a. Note that the number of bent portions 8b is not limited to this. For example, the bent portions 8b may be provided from the upper end to the lower end of each of both sides of the back portion 8a, or may be provided only at the vertical middle portion of each of both sides of the back portion 8a, or may be provided at least partially from the upper end to the lower end of each of both sides of the back portion 8a. The side portions 8c are planar plate-like and bent via the bent portions 8b on both sides of the back portion 8a. In other words, the side portions 8c are composed of a pair of plate-like portions. By configuring the back member 8 to have the back portion 8a, the bent portion 8b, and the side portion 8c, the back member 8 can be stably supported on the utility pole 1 via the side portion 8c. Note that the back member 8 is not limited to a configuration having the back portion 8a, the bent portion 8b, and the side portion 8c.

[0038] As shown in FIG. 8(a), the cable support metal fitting 3 (more specifically, the pulley structure 6) can be moved from a closed state (shown by solid lines in FIG. 8(a)) in which the first bolt 14 passes through the first through-holes 12 of the front member 7 and the rear member 8 and the second bolt 16 passes through the second through-holes 13 of the front member 7 and the rear member 8 to an open state in which the cable guide section 11 is open to the front side by rotating the front member 7 about the first bolt 14 relative to the rear member 8 (for example, 90° as shown by the arc-shaped dashed-dotted arrow in FIG. 8(a)). More specifically, the cable support metal fitting 3 can be moved from a closed state to an open state by translating the front member 7 relative to the rear member 8 as shown by the linear dashed-dotted arrow in FIG. 8(a) and then rotating it about the first bolt 14. The "open state in which the cable guide section 11 is open to the front side" refers to a state in which the overhead cable 2 can be axially inserted and removed from the cable guide section 11.

[0039] By configuring the cable support hardware 3 so that it can be opened from a closed state by moving the front member 7 parallel to the back member 8 and then rotating it around the first bolt 14, the overhead cable 2 can be easily attached or detached from the pulley structure 6 (more specifically, the cable guide section 11) by the simple operation of loosening the first nut 15 and the second nut 17 and then moving the front member 7 parallel to rotate it.However, since the above operation requires parallel movement, the cable support hardware 3 is prevented from accidentally entering the open state, thereby making it easier to prevent the overhead cable 2 from falling off.

[0040] Such a configuration can be realized, for example, by forming the second through portion 13 of the front member 7 as shown in the figure with a circumferential cutout portion 13a that opens to one side of the front member 7 in the closed state and extends circumferentially about the first rotation axis O1, and a radial cutout portion 13b that extends radially about the first rotation axis O1 in the closed state and is continuous with the circumferential cutout portion 13a, and by forming the first through portion 12 of the front member 7 with an elongated cutout portion 12a that extends in the same direction as the radial cutout portion 13b.

[0041] The cable support hardware 3 may be configured so that it can be opened from the closed state by rotating the front member 7 about the first bolt 14 without moving it parallel to the back member 8. Such a configuration makes it possible to easily attach or detach the overhead cable 2 to or from the pulley structure 6 (more specifically, the cable guide section 11).

[0042] The second pulley 10 is disposed above the first pulley 9. With this configuration, when the overhead cable 2 is attached to the utility pole 1 via the cable support metal fitting 3, even if the first nut 15 and the second nut 17 loosen, the front member 7 is prevented from moving parallel to the rear member 8 (upward along the radial direction of the first rotation axis O1) by the action of gravity, thereby preventing the cable support metal fitting 3 from unexpectedly becoming open. Note that the configuration of the cable support metal fitting 3 is not limited to this, and for example, the second pulley 10 may be disposed below the first pulley 9.

[0043] Furthermore, the cable support hardware 3 is not limited to a configuration in which the first bolt 14 and the first nut 15 are provided on the pulley structure 6 and the second bolt 16 and the second nut 17 are provided on the band structure 4, but may also be configured, for example, in which the first bolt 14 and the first nut 15 are provided on the band structure 4 and the second bolt 16 and the second nut 17 are provided on the pulley structure 6.

[0044] 5 and 6(a) to 6(f), the band structure 4 includes a front band 4a, a rear band 4b, a first bolt 14, a first nut 15, a third bolt 4c, a third nut 4d, a fourth bolt 4e, and a fourth nut 4f. The second bolt 16 is provided so as to protrude from the front band 4a toward the front side.

[0045] The band structure 4 can be fixed to the utility pole 1 by placing a front band 4a from one side around the outer periphery of the utility pole 1 and a back band 4b from the other side, screwing a third nut 4d onto a third bolt 4c that passes through one end of the front band 4a and one end of the back band 4b, and screwing a fourth nut 4f onto a fourth bolt 4e that passes through the other end of the front band 4a and the other end of the back band 4b.

[0046] As shown in Figure 6(c) and other figures, an axial gap is provided between the front band 4a and the back member 8. However, the cable support metal fitting 3 is not limited to this, and for example, the axial length of the side portion 8c of the back member 8 may be shortened so as to eliminate the gap.

[0047] According to the cable support hardware 3 of this embodiment, the utility pole 1 and the overhead cable 2 can be installed efficiently and safely, for example, by the procedures shown in Figures 9(a) to 9(f). Note that the method for installing the utility pole 1 and the overhead cable 2 using the cable support hardware 3 of this embodiment is not limited to this.

[0048] In the first step shown in Figure 9(a), a hole for the pole is excavated. First, the location for constructing the new utility pole 1 is determined. After positioning, the pavement is broken up as necessary to expose the ground. Next, a hole for installing the utility pole 1 is excavated, but to avoid accidentally damaging buried pipes for electricity, gas, water, etc., a person carefully digs the hole by hand to a depth of about 1.5 m. Once manual digging has been completed to about 1.5 m and there is no longer any risk of damaging the buried pipes, heavy machinery such as a pole digger is used to dig the hole to the depth required to erect the utility pole 1.

[0049] In the second step shown in Figure 9(b), the overhead cable 2 is attached to the utility pole 1 serving as a newly constructed intermediate pole 1b via the cable support hardware 3. Before lifting the utility pole 1 with heavy machinery, the cable support hardware 3 having the pulley structure 6 is attached on the ground, and the overhead cable 2 is placed in the cable guide section 11 and held there.

[0050] In the third step shown in Figure 9(c), the utility pole 1 and overhead cable 2 are constructed as a single unit. The utility pole 1, holding the overhead cable 2, is lifted by heavy machinery and installed in a hole that has been excavated in advance. Once the installation of the utility pole 1 is complete, the installation of the overhead cable 2 is also completed, eliminating the need for work at height that was required in the reference example.

[0051] In the fourth step shown in Figure 9(d), backfilling is performed. The soil is compacted while filling the hole, and the constructed utility pole 1 is fixed to the ground. The required number of intermediate poles 1b are installed following the procedure of steps 1 to 4 above.

[0052] In the fifth step shown in Figure 9(e), the overhead cable 2 is fixed to one of the dead-end poles 1a. Since the overhead cable 2 needs to be fixed and tensioned at both ends of the new section of the overhead cable 2, the overhead cable 2 is fixed by working at height. The overhead cable 2 is fixed to one of the dead-end poles 1a using a known cable support hardware 3.

[0053] In the sixth step shown in Figure 9(f), the overhead cable 2 is fixed to the other dead-end pole 1a. At this time, the overhead cable 2 is fixed using a known cable support hardware 3, and tension is applied to maintain a certain height above the ground. In addition, any excess length of the overhead cable 2 is treated as necessary.

[0054] According to this procedure, no high-altitude work is required other than for the fixed parts of the overhead cable 2, and the installation of the overhead cable 2 can be completed at the same time as the installation of the utility pole 1, thereby achieving significant efficiency improvements. In addition, the number of high-altitude work tasks required per construction project can be reduced, which contributes to reducing the risk of falling objects and falls that can lead to serious accidents.

[0055] As a secondary effect, the overhead cable 2 is laid in a state where it can move freely between utility poles 1 using the pulley structure 6 except for the fixed parts of the overhead cable 2, which suppresses the occurrence of imbalances in forces acting on multiple utility poles 1 and overhead cables 2, thereby reducing deterioration of the equipment and contributing to a longer lifespan.

[0056] It is also possible to remove the utility pole 1 and the overhead cable 2 together by reversing the above steps.

[0057] The present disclosure is not limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the present disclosure.

[0058] Therefore, the cable support hardware 3 of the above-described embodiment can be modified in various ways as long as it is a cable support hardware 3 that is attached to a utility pole 1 to support an overhead cable 2 and has a pulley structure 6 that can guide the overhead cable 2.

[0059] For example, the pulley structure 6 is not limited to a configuration having the first pulley 9 and the second pulley 10, and may be a configuration having only one pulley. The cable guide portion 11 may be configured to be able to guide the overhead cable 2 using only the outer peripheral surface 9a of the first pulley 9 and the outer peripheral surface 10a of the second pulley 10. The front member 7 and the back member 8 may be configured to be integrally formed.

[0060] In addition, it is preferable that the cable support hardware 3 of the above-mentioned embodiment is a cable support hardware 3 in which the pulley structure 6 has a front member 7, a back member 8 arranged on the utility pole 1 side of the front member 7, a first pulley 9 rotatable around a first rotation axis O1 passing through the front member 7 and the back member 8, a second pulley 10 rotatable around a second rotation axis O2 passing through the front member 7 and the back member 8, and a cable guide portion 11 formed by the front member 7, the back member 8, the outer surface 9a of the first pulley 9, and the outer surface 10a of the second pulley 10 so as to be able to guide the overhead cable 2.

[0061] In the above-described embodiment, the cable support hardware 3 is preferably a cable support hardware 3 in which the front member 7 and the rear member 8 each have a first through-portion 12 and a second through-portion 13, the first bolt 14 can pass through the first through-portion 12 of each of the front member 7 and the rear member 8, the second bolt 16 can pass through the second through-portion 13 of each of the front member 7 and the rear member 8, the first pulley 9 is annular through which the first bolt 14 is passed, and the second pulley 10 is annular through which the second bolt 16 is passed.

[0062] It is preferable that the cable support hardware 3 of the above-mentioned embodiment has a first cylindrical body 18 and a second cylindrical body 19, the first bolt 14 can pass through the first through-portion 12 of each of the front member 7 and the rear member 8 and the first cylindrical body 18 arranged therebetween, the second bolt 16 can pass through the second through-portion 13 of each of the front member 7 and the rear member 8 and the second cylindrical body 19 arranged therebetween, the first pulley 9 is thinner than the first cylindrical body 18 and is annular in shape to be passed through the first cylindrical body 18, and the second pulley 10 is thinner than the second cylindrical body 19 and is annular in shape to be passed through the second cylindrical body 19.

[0063] It is preferable that the cable support hardware 3 of the above-described embodiment is a cable support hardware 3 in which the back member 8 has a back portion 8a, bent portions 8b that bend toward the utility pole 1 on both sides of the back portion 8a, and side portions 8c that are connected to the back portion 8a via the bent portions 8b.

[0064] It is preferable that the cable support hardware 3 of the above-described embodiment is a cable support hardware 3 that can be moved from a closed state in which the first bolt 14 passes through the first through-portion 12 of each of the front member 7 and the rear member 8 and the second bolt 16 passes through the second through-portion 13 of each of the front member 7 and the rear member 8 to an open state in which the cable guide portion 11 is open to the front side by rotating the front member 7 around the first bolt 14 relative to the rear member 8.

[0065] It is preferable that the cable support hardware 3 of the above-described embodiment is a cable support hardware 3 that can be moved from a closed state to an open state by moving the front member 7 parallel to the back member 8 and then rotating it around the first bolt 14.

[0066] The cable support hardware 3 in the above-described embodiment is preferably a cable support hardware 3 in which the second pulley 10 is disposed above the first pulley 9. [Explanation of symbols]

[0067] 1. Electric pole 1a Dead end pole 1b Intermediate column 2. Aerial cables 2a communication cable 2b Steel Wire 3 Cable support hardware 4-band structure 4a Front band 4b Back band 4c Third bolt 4d Third nut 4e 4th bolt 4f 4th nut 5 Cable clamping structure 5a plate part 5b L-shaped bolt 6 Pulley structure 7 Front member 8 Back member 8a Back part 8b Bend part 8c Side part 9 First pulley 9a Outer surface 10 Second pulley 10a Outer surface 11 Cable guide section 12 First through section 12a Long hole cutout 13 Second passage 13a Circumferential notch 13b Radial notch 14 First Bolt 15 First Nut 16 Second bolt 17 Second nut 18 First cylinder 19 Second cylinder O1 First rotation axis O2 Second rotation axis

Claims

1. A cable support hardware that is attached to a utility pole and supports an overhead cable, a pulley structure capable of guiding the overhead cable; the pulley structure comprises a front member, a rear member disposed closer to the utility pole than the front member, a first pulley rotatable around a first rotation axis passing through the front member and the rear member, a second pulley rotatable around a second rotation axis passing through the front member and the rear member, and a cable guide portion formed by the front member, the rear member, an outer peripheral surface of the first pulley, and an outer peripheral surface of the second pulley so as to be able to guide the overhead cable, the front member and the back member each have a first through-portion and a second through-portion; a first bolt can pass through the first through-portions of the front member and the rear member, a second bolt can pass through the second through-portions of the front member and the rear member, the first pulley is annular and has the first bolt passing therethrough; the second pulley is annular and has the second bolt passing therethrough; The cable support metal fitting has a first cylindrical body and a second cylindrical body, the first bolt can pass through the first through-portions of the front member and the back member and the first cylindrical body disposed therebetween, the second bolt can pass through the second through-portions of the front member and the back member and the second cylindrical body disposed therebetween, the first pulley has a smaller thickness than the first cylindrical body and is annular so as to be passed through the first cylindrical body; A cable support hardware in which the second pulley is thinner than the second cylindrical body and forms a ring through which the second cylindrical body is passed.

2. 2. The cable support hardware according to claim 1, wherein the back member has a back portion, a bent portion on each side of the back portion that bends toward the utility pole, and a side portion that is connected to the back portion via the bent portion.

3. 2. The cable support hardware according to claim 1, wherein the cable guide portion can be opened to the front side by rotating the front member relative to the rear member around the first bolt from a closed state in which the first bolt passes through the first through-portion of each of the front member and the rear member and the second bolt passes through the second through-portion of each of the front member and the rear member.

4. 4. The cable support hardware according to claim 3, wherein the cable support hardware can be moved from the closed state to the open state by translating the front member relative to the rear member and then rotating the front member around the first bolt.

5. The cable support hardware according to claim 3 , wherein the second pulley is positioned above the first pulley.

6. A cable support hardware attached to a utility pole to support an overhead cable, a pulley structure capable of guiding the overhead cable; the pulley structure comprises a front member, a rear member disposed closer to the utility pole than the front member, a first pulley rotatable around a first rotation axis passing through the front member and the rear member, a second pulley rotatable around a second rotation axis passing through the front member and the rear member, and a cable guide portion formed by the front member, the rear member, an outer peripheral surface of the first pulley, and an outer peripheral surface of the second pulley so as to be able to guide the overhead cable, the front member and the back member each have a first through-portion and a second through-portion; a first bolt can pass through the first through-portions of the front member and the rear member, a second bolt can pass through the second through-portions of the front member and the rear member, the first pulley is annular and has the first bolt passing therethrough; the second pulley is annular and has the second bolt passing therethrough; From a closed state in which the first bolt passes through the first through-portions of the front member and the rear member and the second bolt passes through the second through-portions of the front member and the rear member, the front member can be rotated around the first bolt relative to the rear member to bring the cable guide portion into an open state in which it is opened to the front side, The cable support hardware can be brought from the closed state to the open state by translating the front member relative to the back member and then rotating it around the first bolt.

7. A cable support hardware attached to a utility pole to support an overhead cable, a pulley structure capable of guiding the overhead cable; the pulley structure comprises a front member, a rear member disposed closer to the utility pole than the front member, a first pulley rotatable around a first rotation axis passing through the front member and the rear member, a second pulley rotatable around a second rotation axis passing through the front member and the rear member, and a cable guide portion formed by the front member, the rear member, an outer peripheral surface of the first pulley, and an outer peripheral surface of the second pulley so as to be able to guide the overhead cable, the front member and the back member each have a first through-portion and a second through-portion; a first bolt can pass through the first through-portions of the front member and the rear member, a second bolt can pass through the second through-portions of the front member and the rear member, the first pulley is annular and has the first bolt passing therethrough; the second pulley is annular and has the second bolt passing therethrough; From a closed state in which the first bolt passes through the first through-portions of the front member and the rear member and the second bolt passes through the second through-portions of the front member and the rear member, the front member can be rotated around the first bolt relative to the rear member to bring the cable guide portion into an open state in which it is opened to the front side, A cable support hardware in which the second pulley is positioned above the first pulley.

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