Rope winding system and rope winding method using the same

Abstract

To provide a rope winding system and a rope winding method capable of using even a rope of a linear body, and simultaneously performing a process of spirally winding the rope around an electric wire by a device of a simple constitution.SOLUTION: According to the present invention, there is provided a rope winding system comprising a rope supply device and a rope winding device self-propelled along an electric wire while spirally winding a rope pulled out from the supply device around an outer periphery of the electric wire, wherein the rope supply device comprises a fixing means for fixing the supply device to the electric wire and a drum rotatably supported by the fixing means and holding the wound rope, the rope winding device includes a self-traveling means having two or more wheels rotating and moving along the electric wire and a self-traveling driving motor for driving at least one of the wheels, and a winding means having a rotating body holding the tip of the rope and rotating in the circumferential direction of the electric wire and a winding driving motor for driving the rotating body.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a rope winding system for winding a drop prevention or snow accretion prevention rope around an electric wire to prevent the electric wire from falling due to corrosion or the like, and a rope winding method using the same. In particular, the present invention relates to a rope winding system including a rope supplying device that supplies a drop prevention or snow accretion prevention rope fixed to one end of the electric wire, and a rope winding device that self-propels from one end of the electric wire to the other end while winding the drop prevention or snow accretion prevention rope pulled out from the rope supplying device spirally around the outer circumference of the electric wire, and a rope winding method using the same. [Background technology]

[0002] Copper electric wires can break due to aging, stress corrosion, etc., and if a wire breaks and hangs (falls) to the ground, it can cause man-made disasters such as electric shock. For this reason, a technique is known for preventing electric wires from hanging down by using ropes that connect adjacent electric wires to each other, as described in, for example, Japanese Patent Laid-Open Publication No. 2001-186646 (Patent Document 1).

[0003] The method of preventing electric wires from sagging described in Patent Document 1 involves connecting adjacent electric wires among multiple electric wires arranged in parallel at multiple points using connecting ropes, so that even if a break occurs, the broken electric wire is supported by the adjacent electric wire using the connecting rope, preventing it from sagging (falling) to the ground.

[0004] However, the technology for preventing sagging electric wires described in Patent Document 1 requires attaching multiple connecting ropes to the electric wires between each utility pole, which requires the use of an aerial work platform to attach the multiple connecting ropes, resulting in a heavy workload and extremely dangerous work.In addition, there is also the problem that the aerial work platform cannot enter narrow spaces, making it impossible to attach the connecting ropes to the electric wires.

[0005] To solve the above problems, a technique is known in which an anti-drop wire is wrapped around an electric wire to prevent the electric wire from sagging, as described in, for example, JP 2019-75929 A (Patent Document 2).

[0006] The technology for preventing sagging electric wires described in Patent Document 2 involves wrapping and fixing a coiled wire around one end of an electric wire installed between utility poles, and pulling the free end of the wound wire (coil) toward the other end of the electric wire with a pulling tool installed so that it can travel on the electric wire, thereby stretching the wire (coil) and installing and fixing it in a spiral shape over the entire length of the electric wire.As a result, according to the method for preventing sagging electric wires described in Patent Document 2, even if a break occurs, the broken electric wire is supported by the spirally installed wire, and is therefore prevented from sagging (falling) to the ground.

[0007] Furthermore, although not intended to prevent sagging of electric wires, known methods for winding a linear object such as a wire directly around an electric wire without the need to form the linear object into a coil shape include optical fiber cable or tape winding techniques such as those described in JP 1-133004 A (Patent Document 3) and JP 2017-103939 A (Patent Document 4).

[0008] The method of winding a linear body described in Patent Documents 3 and 4 involves a self-propelled device that can run on an electric wire and is equipped with a wheel that is arranged at an angle to the electric wire, and while running, the wheel with the optical fiber cable or tape wound around it rotates and revolves around the electric wire, thereby winding the optical fiber cable or tape in a spiral shape over the entire length of the electric wire. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-186646 [Patent Document 2] Japanese Patent Application Publication No. 2019-75929 [Patent Document 3] Japanese Patent Application Publication No. 1-133004 [Patent Document 4] Japanese Patent Application Laid-Open No. 2017-103939 [Patent Document 5] Japanese Patent Application Laid-Open No. 2000-152474 [Patent Document 6] Japanese Patent Application Laid-Open No. 2006-166647 Summary of the Invention [Problem to be solved by the invention]

[0010] However, the technology for preventing sagging of electric wires described in Patent Document 2 requires the work of rewinding the wire formed into a coil shape onto the electric wire, a wire winding tool to perform this work, and the work of pulling the end of the wire (coil) rewound onto the electric wire toward the other utility pole, a pilot wire pulling tool to perform this work, which results in a high workload for installing the wire (coil) in a spiral shape onto the electric wire, and also results in a complex and expensive system configuration.

[0011] Furthermore, the technology for preventing sagging of electric wires described in Patent Document 2 involves fixing one end of a coiled wire to an electric wire and stretching the other end toward the other utility pole, so as the wire (coil) is stretched, its diameter shrinks and the electric wire is wound tight, and if the distance between utility poles is long, the frictional resistance with the electric wire increases due to the winding tightness, making it impossible to install the wire (coil) over the entire length of the electric wire. Also, to avoid the above problem, it is necessary to use a coil with a large number of windings (long coil extension) to prevent winding tightness from occurring, which could result in wasted coil.

[0012] Furthermore, the technology for preventing sagging electric wires described in Patent Document 2 requires that a linear body such as a wire be formed into a coil shape before use, which poses the problem of cumbersome and costly preparation of the coil formed body. Furthermore, the amount of work required for preparing the coil formed body increases, and since the pole spacing (span) varies depending on the site, the coil formed body must be prepared to a fixed length, which always results in waste, resulting in high costs and a waste of resources.

[0013] On the other hand, in order to solve the problems that arise when a linear object such as a wire must be formed into a coil shape before use when winding a wire or the like around an electric cable, it is conceivable to use a winding device for a linear object as described in the above-mentioned Patent Documents 3 and 4. However, the optical fiber cable or tape used in the winding device for a linear object described in Patent Documents 3 and 4 is generally made of a low-strength, lightweight material that weighs from a few grams to a few tens of grams per meter, so regardless of the material used, there is a problem that it cannot support an electric cable that has an average pole-to-pole length (span) of about 40 m and weighs more than 30 kg in the event of a wire breakage.

[0014] Furthermore, in the winding devices for linear objects described in Patent Documents 3 and 4, if a wire made of steel wire or the like described in Patent Document 2 is used instead of an optical fiber cable or tape to support a broken electric wire, the weight of the wire becomes much heavier than an optical fiber cable or tape. Therefore, when a wheel with a wire wound around it is rotated around the winding device and the electric wire, the balance of the winding device on the electric wire becomes extremely unstable, which can cause derailment, a fall, or damage to the electric wire, making it essentially unusable.

[0015] Further examples of techniques that utilize a spirally wound rope around an electric wire include a method described in, for example, JP 2000-152474 A (Patent Document 5) in which a spiral rod is wound around the outer periphery of the electric wire to cause unevenness or division in the growth of snow accretion, thereby preventing snow from accumulating on overhead power transmission lines, and a method described in, for example, JP 2006-166647 A (Patent Document 6) in which a snow-melting wire made of a magnetic material with a low Curie point is wound around the outer periphery of the electric wire, thereby melting the snow with heat generated by the action of an alternating magnetic field when current flows through the overhead power transmission line, thereby preventing snow from accumulating on the overhead power transmission line. However, these snow accretion prevention methods also have the same problems as the methods for preventing electric wires from falling described in Patent Documents 2 to 4, because they require winding a spiral rod or snow-melting wire around the electric wire between steel towers at high altitudes.

[0016] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a rope winding system and a rope winding method using the same, which can be used to spirally wind a rope around an electric wire to prevent it from falling or accumulating on the wire, and which can use a rope made of a high-strength wire or the like that has a certain weight that can support a broken electric wire, or a linear rope, and which can perform the process of spirally winding the rope over the entire length of the electric wire simultaneously using a device with a simple configuration, without separating the winding process and the pulling process as in the case of a winding process and a pulling process. [Means for solving the problem]

[0017] In order to solve the above problems, the inventors of the present invention have conducted extensive research into the material of ropes for fall prevention or snow accretion prevention, the configurations of the rope payout and supply means, the rope winding means, and the rope pulling means, etc. As a result, they have found that in order to wind a rope made of a heavy wire or the like in a spiral shape around the entire length of an electric wire, the above problems can be solved by dividing and allocating the series of operations between a rope supply device that supplies the rope from a payout means attached to the electric wire at a fixed position, and a rope winding device that fixes the tip of the paid-out rope and moves freely while winding the tip of the rope around the outer periphery of the electric wire, thereby completing the present invention.

[0018] Furthermore, with regard to the problem of winding a rope made of a linear wire or the like in a spiral shape over the entire length of an electric wire without forming it into a coil shape, the inventors discovered that if the rotation axis of the payout means of the rope supply device around which the rope is wound is not positioned in a direction at least perpendicular to the electric wire, the rope supply device will be able to pay out the linear rope while maintaining its coil-like winding tendency, thereby solving the above problem and leading to the completion of the present invention.

[0019] That is, according to the present invention, there is provided a rope winding system comprising a rope supplying device and a rope winding device that moves self-propelled along the electric wire while spirally winding a fall prevention or snow accretion prevention rope pulled out from the rope supplying device around the outer circumference of the electric wire, wherein the rope supplying device comprises a fixing means for fixing the rope supplying device to the electric wire and a drum that is rotatably supported by the fixing means and holds the wound fall prevention or snow accretion prevention rope, and the rope winding device comprises a self-propelled means having two or more wheels that rotate along the electric wire and a self-propelled drive motor that drives at least one of the wheels, and a winding means that holds the tip of the fall prevention or snow accretion prevention rope and has a rotating body that rotates in the circumferential direction of the electric wire and a winding drive motor that drives the rotating body.

[0020] In this invention, the rope supply device, which has a drum around which a rope for preventing falling or snow accretion is wound, is separate and independent from the rope winding device and is fixed to one end of the electric wire. Therefore, the rope winding device does not need to carry a rope made of a heavy wire or the like, and does not need to rotate it around the electric wire, so it can move stably and in a balanced manner from one end of the electric wire to the other.

[0021] In addition, the drum on which the rope is wound is rotatably supported by a fixing means attached to the electric wire, and can pay out the rope while rotating in synchronization with the self-propelled rope winding device and the rotation of the rotor of the winding means. Therefore, the rope does not suddenly shrink in diameter as the rope winding device moves away from the rope supply device, which would cause the rope to be wound tightly around the electric wire, suppressing an increase in frictional resistance with the electric wire due to winding tightness, and does not hinder the self-propelled rope winding device.

[0022] In the present invention, in order to improve synchronization of the drum with the rotating body of the winding means, it is preferable that the drum be rotatably supported by the fixing means via a plurality of rollers or a plurality of balls.

[0023] In order to facilitate the installation of the rope winding device on the electric wire, it is preferable that the rotating body of the winding means is provided with a cylindrical body, and that the body is divided into two parts so that they can be attached and detached to and from the electric wire using a magnet, and that a housing is provided on the outer periphery of the body to rotatably support the body.Furthermore, it is preferable that a plurality of rollers or a plurality of balls are arranged on the inner surface of the housing to support the outer periphery of the rotating body of the winding means, and that the housing is divided into two parts so that it can be attached and detached to and from the outer periphery of the rotating body.

[0024] In the rope winding system of the present invention, it is preferable that the rope supply device be arranged so that the drum's rotation axis is at least in a direction that is not perpendicular to the electric wire, it is more preferable that the drum's rotation axis is arranged in a vertical plane that intersects the electric wire within a range of 0±45 degrees, and it is even more preferable that the drum's rotation axis is arranged in a vertical direction in a vertical plane that intersects the electric wire parallel to the electric wire.

[0025] In this invention, by arranging the rotation axis of the drum of the rope supplying device in a direction that is not perpendicular to the electric wire, it becomes possible to pay out the fall prevention or snow accretion prevention rope so that it can be unwound while maintaining its coil-like winding tendency (twist) not only in the direction of rotation of the drum but also in a direction perpendicular to the rotation direction (a direction parallel to the rotation axis). Therefore, even if the rope is not formed into a coil shape, it will not be wound tightly around the electric wire from the beginning, and the increase in frictional resistance with the electric wire due to tightening the winding will be suppressed, and the free-travel of the rope winding device will not be hindered.

[0026] Furthermore, in the present invention, the rotation axis of the drum of the rope supplying device is preferably positioned in a vertical plane that intersects the electric wire within a range of 0±45 degrees, so that the plane including the payout direction of the fall prevention or snow accretion prevention rope wound around the drum (the plane or rotation plane including the rotation direction of the drum) is positioned in a direction perpendicular or oblique to the electric wire. Therefore, the rope is subjected to a pulling force along the electric wire due to the rotation and self-propelling of the rotating body of the winding means of the rope winding device, and a pulling force in a direction perpendicular to the electric wire due to the positioning of the rotation axis of the drum.

[0027] At that time, the rotation axis of the drum is arranged in a vertical plane that intersects the electric wire within a range of 0±45 degrees, so the force pulling the rope along the electric wire is equal to or greater than the force pulling the rope in a direction perpendicular to the electric wire.As a result, the force pulling the rope along the electric wire and parallel to the electric wire acts mainly to unwind the rope from the drum, and the force pulling the rope in a direction perpendicular to the electric wire acts mainly to rotate the drum.

[0028] As a result, the rope is pulled out as if it were being unwound while retaining its coil-like twist, preventing it from being wound too tightly around the wire from the beginning. Also, the drum around which the rope is wound rotates in sync with the rotation and self-propelled motion of the rotating body of the winding means of the rope winding device, which prevents an increase in frictional resistance with the wire due to tightening.

[0029] In particular, when the rotation axis of the drum of the rope supply device is arranged vertically in a vertical plane that intersects the electric wire and is parallel to the electric wire, such as when the drum of the rope winding device is hung from the electric wire so that it rotates horizontally, the rope wound around the drum is unwound while retaining its coil-like twist.

[0030] In the rope winding system of the present invention, in order to prevent the electric wire from being tightly wound by the rope and to enable the rope to be smoothly wound in a spiral over the entire length of the electric wire, it is preferable that the radius of the drum of the rope supply device is the same as or larger than the winding radius of the rope for fall prevention or snow accretion prevention by the rotating body. Furthermore, as for the rope winding conditions and winding manner, it is preferable to control the number of rotations per unit time of the drum to be 0.7 to 1.1 times the number of windings (number of rotations) per unit time of the rotating body of the rope winding device, and it is preferable to control the rope winding pitch to be 1 / 3 to 1 / 1 (m).

[0031] The number of times the rotating body is wound around itself per unit time (number of rotations) and the winding pitch of the rope can be easily calculated by providing a counter to the winding means to measure the number of rotations of the rotating body or the winding drive motor, since the length of the electric wire around which the rope is wound can be determined from information such as the distance between each utility pole. Furthermore, by controlling the rotating body or the winding drive motor using the number of rotations measured by the counter, the number of times the rotating body is wound around itself per unit time (number of rotations) and the winding pitch of the rope can be easily controlled to the desired values.

[0032] According to the present invention, there is provided a method for spirally winding a rope for preventing falling or snow accretion around an electric wire installed between a first electric pole and a second electric pole using the above-mentioned rope winding system.

[0033] Specifically, the method of the present invention for spirally winding a rope for fall prevention or snow accretion prevention includes the steps of: fixing a rope supplying device, which includes a fixing means for fixing to an electric wire and a drum that is supported by the fixing means so as to be horizontally rotatable and that holds the wound rope for fall prevention or snow accretion prevention, to the first electric pole side of the electric wire; installing a rope winding device on the electric wire adjacent to the first electric pole side of the rope supplying device, which includes a self-propelled means having two or more wheels that rotate along the electric wire and a self-propelled drive motor that drives at least one of the wheels; and a winding means that holds the tip of the fall prevention or snow accretion prevention rope and has a rotating body that rotates in the circumferential direction of the electric wire and a winding drive motor that drives the rotating body; and winding the rope around the drum. the step of fixing the tip of the fall prevention or snow accretion prevention rope to the rotating body so that the winding direction of the attached fall prevention or snow accretion prevention rope coincides with the rotation direction of the rotating body; the step of turning on the power of the rope winding device to rotate the rotating body with the winding drive motor to wind the fall prevention or snow accretion prevention rope spirally around the electric wire while also rotating the wheels with the self-propelled drive motor to self-propel the rope winding device on the electric wire from the first electric pole toward the second electric pole; and the step of turning off the power of the rope winding device to stop the winding means and the self-propelled means when the rope winding device reaches the side of the second electric pole.

[0034] In this invention, the above-mentioned rope winding system is used as a method for spirally winding a fall prevention or snow accretion prevention rope around an electric wire strung between utility poles. Therefore, it is possible to use a fall prevention or snow accretion prevention rope made of a high-strength wire or the like that has a certain weight sufficient to support a broken electric wire, even if the rope is a linear rope. Furthermore, the process of spirally winding the rope around the electric wire can be performed simultaneously with the winding process and the towing (self-propelled) process, which makes the work extremely efficient and significantly reduces the labor load. Furthermore, the winding process and the towing (self-propelled) process can also be performed by remote control, so the rope can be safely and efficiently wound around the electric wire in a spiral shape even in narrow areas where aerial work vehicles cannot enter, or in ponds, rivers, or farmland (paddy fields) where workers cannot walk under the electric wire to extend the coil. [Effects of the Invention]

[0035] According to the rope winding system and rope winding method using the same of the present invention, in order to spirally wind a rope for preventing falling or snow accumulation around an electric wire, it is no longer necessary to form a linear body such as a wire into a coil shape as in the past, nor is it necessary to use a lightweight, low-strength linear body such as tape.A rope made of a high-strength wire or the like that has a certain weight that can support a broken electric wire, or even a linear rope, can be used.

[0036] According to the rope winding system and the rope winding method using the same of the present invention, the process of winding a rope spirally around an electric wire can be performed simultaneously with the winding process and the towing (self-propelled) process, which makes the work extremely efficient and significantly reduces the burden on workers. Furthermore, the winding process and the towing (self-propelled) process can also be performed by remote control, so the rope can be safely and efficiently wound spirally around an electric wire even in narrow areas where an aerial work vehicle cannot enter, or in ponds, rivers, or farmland (paddy fields) where workers cannot walk under the electric wire to extend the coil. [Brief explanation of the drawings]

[0037] [Figure 1] FIG. 1 is a partially transparent perspective view showing a rope winding system according to one embodiment of the present invention attached to an electric wire. [Figure 2] FIG. 2 is a partially transparent perspective view showing an overall outline of a rope winding device in the rope winding system. [Figure 3A] FIG. 3A is a perspective view showing an overall outline of a winding means of the rope winding device. [Figure 3B] FIG. 3B is an exploded view showing an exploded embodiment of the wrapping means shown in FIG. 3A. [Figure 4] FIG. 4 is a partially transparent perspective view showing the overall outline of the self-propelled means of the rope winding device. [Figure 5A] FIG. 5A is a perspective view (a) showing an overview of the rope winding method according to one embodiment of the present invention at the start of winding, and a partially enlarged view (b) of a rope winding device. [Figure 5B] FIG. 5B is a perspective view (a) showing an overview of the rope winding method shown in FIG. 5A at the end of winding, and a partially enlarged view (b) of the rope winding device. DETAILED DESCRIPTION OF THE INVENTION

[0038] Hereinafter, a rope winding system and a rope winding method using the same according to one embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the examples shown below, and various modifications are possible within the scope of the technical concept of the present invention. [Example]

[0039] <Rope winding system> FIG. 1 is a partially transparent perspective view showing a rope winding system 1 according to one embodiment of the present invention attached to an electric wire 3.

[0040] As can be clearly understood by referring to Figure 1, the rope winding system 1 of this embodiment is composed of a rope supply device 5 having a drum 51 around which a rope 2 for preventing falls or snow accretion is wound, and a rope winding device 6 that fixes the tip of the rope 2 pulled out from the drum 51 to a rotating body 71 and travels while winding the tip of the rope 2 around an electric wire 3, and both devices 5 and 6 are separate and independent from each other.

[0041] Therefore, the rope winding device 6 of this embodiment does not need to carry the rope 2, which includes heavy wires, nor does it need to rotate it around the electric wire 3, so the electric wire 3 can be self-propelled in a balanced and stable manner over the entire length between the utility poles 4.

[0042] <Rope supply device> As shown in Figure 1, the rope supply device 5 includes a fixing means 50 for fixing the rope supply device 5 to the electric wire 3, and a drum 51 that is rotatably supported by the fixing means 50 and holds the wound-up fall prevention or snow accretion prevention rope 2.

[0043] More specifically, the fixing means 50 has a hook 500, a rod-shaped arm 501 extending downward from the hook 500, and a circular flange 502 fixed to the lower end of the arm 501 and attached horizontally so as to be perpendicular to the arm 501. Meanwhile, the drum 51 has a drum body 510 around which the rope 2 is wound and a turntable 511 attached below it, and a cylindrical through-hole is provided in the center of the drum 51, through which the arm 501 of the fixing means 50 can be slidably inserted. Furthermore, in order to reduce frictional resistance caused by rotation and make rotation smoother, the turntable 511 of the drum 51 is rotatably supported on the flange 502 of the fixing means 50 via a plurality of rollers or balls (not shown).

[0044] In this embodiment, the hook 500 is used as a fixture for fixing to the electric wire 3, but there are no particular limitations on the fixture as long as it can be supported by and fixed to the electric wire 3, and any known fixture can be used. Furthermore, the object to which the rope supply device 5 is fixed using the fixing means 50 does not necessarily have to be the electric wire 3, but may be the electric pole 4 supporting the electric wire 3 and its parts.

[0045] In this embodiment, the rotation axis P of the drum 51 is disposed vertically in a vertical plane that is parallel to and intersects with the electric wire 3 so that the drum 51 rotates horizontally. That is, the rotation axis P of the drum 51 is disposed so as to extend vertically and intersect with the electric wire 3.

[0046] Therefore, the drum 51 is rotatably supported by the fixing means 50 attached to the electric wire 3, and can pay out the rope 2 while rotating in synchronization with the self-propelled rope winding device 6 described below and the rotation of the rotor 71 of the winding means 7. In addition, as the rope winding device 6 moves away from the rope supply device 5, the rope 2 does not suddenly shrink in diameter and tighten around the electric wire 3, which suppresses an increase in frictional resistance with the electric wire 3 due to tightening, and does not hinder the travel of the rope winding device 6.

[0047] However, in the rope winding system 1 of the present invention, unlike this embodiment, it is not necessary to arrange the rotation axis P of the drum 51 in a vertical direction limited to a vertical plane that intersects the electric wire 3 in parallel so as to rotate the drum 51 of the rope supply device 5 in a horizontal direction, and it is sufficient that the rotation axis P of the drum 51 is arranged in a direction that is at least perpendicular to the electric wire 3. Furthermore, it is more preferable to arrange the rotation axis P of the drum 51 in a vertical plane that intersects the electric wire 3 in a range of 0±45 degrees.

[0048] In this embodiment, as long as the rotation axis P of the drum 51 is located within a vertical plane intersecting the electric wire 3 within a range of 0±45 degrees, the drum 51 may be arranged not only to rotate horizontally as shown in FIG. 1 but also to rotate vertically or obliquely. Furthermore, the rotation axis P of the drum 51 does not necessarily need to be arranged to intersect with the electric wire 3, and may be arranged, for example, at a position offset from the electric wire 3. However, it is preferable that the rotation axis P of the drum 51 be arranged to intersect with the electric wire 3 in order to realize smooth payout of the rope 2.

[0049] In this embodiment, by arranging the rotation axis P of the drum 51 of the rope supply device 5 in a direction that is not at least perpendicular to the electric wire 3, it becomes possible to pay out the rope 2 so that it can be unwound while maintaining its coil-like winding tendency (twist) not only in the rotation direction of the drum 51 but also in a direction perpendicular to the rotation direction (a direction parallel to the rotation axis P). As a result, even if the rope 2 is not formed into a coil shape, it is not wound tightly around the electric wire 3 from the beginning of winding, which suppresses an increase in frictional resistance with the electric wire 3 due to tightening, and also prevents obstruction to the running of the rope winding device 6.

[0050] Furthermore, in this embodiment, when the rotation axis P of the drum 51 of the rope supply device 5 is arranged in a vertical plane that preferably intersects with the electric wire 3 in the range of 0±45 degrees, the plane including the payout direction of the rope 2 wound around the drum 51 (the plane or rotation plane including the rotation direction of the drum 51) is arranged in a direction perpendicular or oblique to the electric wire 3. Therefore, the rope 2 is subjected to a force pulling it along the electric wire 3 due to the rotation and self-propelled motion of the rotor 71 of the winding means 7 of the rope winding device 6, and a force pulling it in a direction perpendicular to the electric wire 3 due to the arrangement of the rotation axis P of the drum 51.

[0051] At this time, since the rotation axis P of the drum 51 is arranged in a vertical plane intersecting the electric wire 3 within a range of 0±45 degrees, the force pulling the rope 2 along the electric wire 3 and parallel to the electric wire 3 is equal to or greater than the force pulling the rope 2 in a direction perpendicular to the electric wire 3. As a result, the force pulling the rope 2 along the electric wire 3 acts mainly to unwind the rope 2 from the drum 51, and the force pulling the rope 2 in a direction perpendicular to the electric wire 3 acts mainly to rotate the drum 51.

[0052] As a result, in the rope winding system 1 of this embodiment, the rope 2 is paid out so as to be unwound while retaining its coil-like winding tendency (twist), preventing the rope 2 from being tightly wound around the electric wire 3 from the beginning of winding. In addition, the drum 51 around which the rope 2 is wound rotates in synchronization with the rotation and free-running of the rotor 71 of the winding means 7 of the rope winding device 6, thereby suppressing an increase in frictional resistance with the electric wire 3 due to tightening of the winding.

[0053] In particular, as in this embodiment, when the rotation axis P of the drum 51 of the rope supply device 5 is arranged vertically in a vertical plane that intersects the electric wire 3 and is parallel to the electric wire 3, such as when the drum 51 of the rope winding device 6 is hung from the electric wire 3 so as to rotate horizontally, the rope 2 wound around the drum 51 is paid out as if it is being unwound while continuing to retain its coil-like winding tendency (twist).

[0054] Furthermore, in the rope winding system 1 of this embodiment, the radius of the drum 51 of the rope supply device 5 is set to be the same as or larger than the winding radius of the rope 2 by the rotor 71 of the rope winding device 6 described below, thereby making it difficult for the rope 2 to tighten around the electric wire 3 and enabling the rope 2 to be smoothly wound in a spiral over the entire length of the electric wire 3. Note that the winding radius of the rope 2 by the rotor 71 means the distance between the fixing point on the rotor 71 where the tip of the rope 2 is fixed and the central axis of the rotor 71, in other words, the central axis of the electric wire 3.

[0055] <Rope winding device> Fig. 2 shows a partially transparent perspective view illustrating the overall outline of the rope winding device 6 of the rope winding system 1 of this embodiment. Fig. 3A shows a perspective view illustrating the overall outline of the winding means 7 of the rope winding device 6, and Fig. 3B shows an exploded view illustrating an exploded state of the winding means 7 shown in Fig. 3A. Furthermore, Fig. 4 shows a partially transparent perspective view illustrating the overall outline of the self-propelled means 8 of the rope winding device 6.

[0056] 2, 3A, 3B, and 4, the rope winding device 6 of this embodiment is composed of winding means 7 that winds the fall prevention or snow accretion prevention rope 2 around the electric wire 3, and self-propelled means 8 that is combined with or connected to the winding means 7 and travels on the electric wire 3 from one electric pole 4 to another electric pole 4. The winding means 7 is detachably attached to the self-propelled means 8.

[0057] <Winding method> As shown in Figures 3A and 3B, the winding means 7 has a base plate 70 consisting of table members extending horizontally in two upper and lower levels and wall members extending vertically that connect the two upper and lower table members to each other, a rotating body 71 that holds and fixes the tip of the rope 2 pulled out from the drum 51 of the rope supply device 5, a housing 72 that rotatably supports the rotating body 71, and a winding drive motor 73 that drives the rotating body 71 via a gear 74, and the housing 72 and the winding drive motor 73 are each supported by the table members of the housing 72 that are arranged in two upper and lower levels.

[0058] Rotating body 71 has a cylindrical body 710 and brim-like flanges 711 formed on both ends of body 710, and teeth are formed on the outer periphery of flange 711 on the side opposite to the traveling direction of rope winding device 6 (rear side) to engage with gear 74 connected to winding drive motor 73. In addition, a fixing device (not shown) such as a U-shaped hook is arranged on the side of flange 711 on which the teeth are formed, and the tip of rope 2 pulled out from drum 51 is fixed to the fixing device.

[0059] Housing 72 is fixed to the upper table member of the two-tiered table members, one above the other. Housing 72 is attached to the outside of rotating body 71, and a plurality of rollers 720 are arranged on the inner peripheral surface of housing 72, so that rotating body 71 can be rotatably supported from the outer periphery of body 710. Furthermore, brim-shaped flanges 711 having an outer diameter larger than the diameter of the inner peripheral surface of housing 72 are formed on both ends of body 710, so that rotating body 71 will not fall out of housing 72 in the direction of the rotation axis.

[0060] In this embodiment, the rotor 71 is divided into an upper rotor 71a and a lower rotor 71b, and a magnet 712 is attached to the joint surface of the upper rotor 71a and the lower rotor 71b to magnetically attach the rotors 71a and 71b together in a detachable manner. Therefore, the upper and lower rotors 71a and 71b can be easily and safely attached by sandwiching the electric wire 3 between them from above and below.

[0061] Similarly to the rotating body 71, the housing 72 is also divided into an upper housing 72a and a lower housing 72b, which are connected by a hinge (not shown) so that they can be opened and closed. A locking device (not shown), such as a hook, is attached to the side of the housing 72 opposite to the side where the hinge is attached, so that after the rotating body 71 is set inside the housing 72, by closing the upper and lower housings 72a and 72b and locking them with the locking device, the upper and lower housings 72a and 72b will not open by themselves and the rotating body 71 will not fall off.

[0062] The winding drive motor 73 is fixed on the lower of the two table members, and a battery (not shown) for driving the winding drive motor 73 is attached below the lower table member. Therefore, the battery also functions as a counterweight to balance the winding means 7 when it is attached to the electric wire 3.

[0063] In addition, a gear 74 is attached to the tip of the drive shaft of the winding drive motor 73 so as to mesh with teeth formed on the outer periphery of the flange portion 711 for transmitting driving force to the rotating body 71. Therefore, by driving the winding drive motor 73, the rotating body 71 to which the tip of the rope 2 is fixed rotates with the electric wire 3 as the center (rotation axis), and the rope 2 is wound around the outer periphery of the electric wire 3.

[0064] As described above, the winding means 7 of this embodiment is divided into two parts, the upper and lower rotors 71 and the housing 72, which are detachably separated and independent from the self-propelled means 8. Therefore, by attaching the upper and lower rotors 71a and 71b so as to sandwich the electric wire 3 from above and below, and then setting the rotor 71 inside the upper and lower housings 72a and 72b and closing them in a locked state, the electric wire 3 can be attached to and removed from the electric wire 3 with a simple operation without removing the electric wire 3 from the utility pole 4.

[0065] <Self-propelled means> 4, the self-propelled means 8 has a housing 80, three wheels 82 arranged in a horizontal row and having circumferential grooves that can engage with the electric wire 3 from above, and two self-propelled drive motors 83 directly connected to the leading wheel 82 and the trailing wheel 82, respectively, and the three wheels 82 and the two self-propelled drive motors 83 are each supported by the housing 80. There is no particular limitation on the number of wheels 82 as long as it is two or more, and the number of wheels 82 driven by the self-propelled drive motor 83 should also be at least one.

[0066] The housing 80 has a detachable device (not shown) such as a latch that detachably attaches or connects the base plate 70 of the winding means 7 to the side (rear side) opposite to the traveling direction of the rope winding device 6, and has two opening / closing covers 81 attached to the bottom using hinges (not shown) so that they can be opened and closed. In addition, two batteries (not shown) for driving the self-propelled drive motors 83 are attached below each opening / closing cover 81. Therefore, the batteries also function as counterweights to balance the self-propelled means 8 when it travels on the electric wire 3.

[0067] In this way, in the self-propelled means 8 of this embodiment, when the openable cover 81 attached to the bottom of the housing 80 is opened, the three wheels 82 can be directly accessed from the bottom of the housing 80. Therefore, when the self-propelled means 8 is placed on the electric wire 3 so as to cover it from above with the openable cover 81 of the housing 80 in the open state, the circumferential grooves of the three wheels 82 can easily engage with the electric wire 3, and the self-propelled means 8 can be set to a state in which it can travel.

[0068] Furthermore, if the openable cover 81 of the housing 80 is kept closed after the self-propelled means 8 has been set in a state where it can travel, even if the wheels 82 of the self-propelled means 8 should derail from the electric wire 3, the housing 80 will support the electric wire 3, preventing the self-propelled means 8 from falling from the electric wire 3 and ensuring safety. Furthermore, as a double means for preventing the self-propelled means 8 from falling, a fall prevention rope (not shown) may be attached to the housing 80 so as to capture the housing 80 of the self-propelled means 8 and the electric wire 3 together.

[0069] In this embodiment, as described above, the winding means 7 and the self-propelled means 8 are detachably separate and independent, so that by attaching the winding means 7 and the self-propelled means 8 separately to the electric wire 3 and then combining or connecting the two means 7, 8, the rope winding device 6 can be attached to the electric wire 3 extremely easily and safely.

[0070] <How to wrap the rope> Fig. 5A shows a perspective view (a) of a rope winding method according to one embodiment of the present invention at the start of winding and a partially enlarged view (b) of the rope winding device, and Fig. 5B shows a perspective view (a) of a rope winding method shown in Fig. 5A at the end of winding and a partially enlarged view (b) of the rope winding device. As shown in Figs. 5A and 5B, the present invention provides a method for spirally winding a fall prevention or snow accretion prevention rope 2 around an electric wire 3 installed between a first electric pole 4a and a second electric pole 4b using the above-described rope winding system 1.

[0071] As shown in Figure 5A, the rope winding method of this embodiment includes a step of fixing a rope supplying device 5 to the electric wire 3 near the first utility pole 4a. The rope supplying device 5 includes a fixing means 50 for fixing to the electric wire 3, and a drum 51 that is supported by the fixing means 50 so as to be horizontally rotatable and that holds the wound fall prevention or snow accretion prevention rope 2. In this embodiment, the fixing means 50 is a hook 500, so the rope supplying device 5 can be fixed to the electric wire 3 simply by hooking it, but if the attachment position of the rope supplying device 5 moves while the rope 2 is being pulled, it is sufficient to firmly fix it to the electric wire 3 using fixing means 50 with a clamping function.

[0072] Furthermore, in this embodiment, before or after the installation of the rope supplying device 5, a step is included in which a rope winding device 6 equipped with a self-propelled means 8 and a winding means 7 is installed on the electric wire 3 adjacent to the first utility pole 4b side of the rope supplying device 5 (FIG. 5A). The self-propelled means 8 has three wheels 82 that rotate along the electric wire 3 and two self-propelled drive motors 83 that drive the wheels 82, and the winding means 7 has a rotating body 71 that holds the tip of the rope 2 and rotates in the circumferential direction of the electric wire 3, and a winding drive motor 73 that drives the rotating body 71.

[0073] More specifically, the method of attaching the self-propelled means 8 to the electric wire 3 is such that, when the openable cover 81 attached to the bottom of the housing 80 of the self-propelled means 8 is opened, the three wheels 82 can be directly accessed from the bottom of the housing 80. Therefore, when the self-propelled means 8 is placed on the electric wire 3 so that the openable cover 81 of the housing 80 is placed over it from above with the openable cover 81 of the housing 80 in an open state, the circumferential grooves of the three wheels 82 easily engage with the electric wire 3, and the self-propelled means 8 can be set to a state in which it can run. Furthermore, after setting the self-propelled means 8 to a state in which it can run, if the openable cover 81 of the housing 80 is kept closed, even if the wheels 82 of the self-propelled means 8 derail from the electric wire 3, the self-propelled means 8 is supported by the electric wire 3 by the housing 80, so that it is safe and will not fall off the electric wire 3.

[0074] In addition, the method of attaching the winding means 7 to the electric wire 3 is, more specifically, as the rotating body 71 and housing 72 of the winding means 7 are divided into two parts, upper and lower, by attaching the upper and lower rotating bodies 71a, 71b so as to sandwich the electric wire 3 from above and below, and then setting the rotating body 71 inside the upper and lower housings 72a, 72b and closing them in a locked state, the electric wire 3 can be attached to the electric wire 3 with a simple operation without removing the electric wire 3 from the utility pole 4.

[0075] In this embodiment, the winding means 7 and the self-propelled means 8 are detachably separate and independent, so that by attaching the winding means 7 and the self-propelled means 8 separately to the electric wire 3 as described above, and then combining or connecting the two means 7, 8, the rope winding device 6 can be attached to the electric wire 3 extremely easily and safely.

[0076] In this embodiment, after the rope supply device 5 and the rope winding device 6 are attached to the electric wire 3, a step is included in which the tip of the rope 2 is fixed to the rotating body 71 so that the winding direction of the rope 2 wound around the drum 51 coincides with the rotation direction of the rotating body 71 (Figure 5A).

[0077] As shown in Figures 5A and 5B, in this embodiment, in order to wind the rope 2 spirally around the outer periphery of the electric wire 3, the process includes the steps of turning on the power of the rope winding device 6, causing the winding drive motor 73 to rotate the rotor 71 to wind the rope 2 around the electric wire 3, and also rotating the wheels 82 with the self-propelled drive motor 83 to self-propel the rope winding device 6 over the electric wire 3 from the first electric pole 4a toward the second electric pole 4b, and then turning off the power of the rope winding device 6 when the rope winding device 6 reaches the edge of the second electric pole 4b, thereby stopping the winding means 7 and the self-propelled means 8.

[0078] After the power supply to the rope winding device 6 is turned off, the end of the rope 2 pulled to the second utility pole 4b is removed from the rotor 71 of the rope winding device 6. The rope winding device 6 is then removed from the electric wire 3 or transferred to the electric wire 3 of another phase, and the end of the rope 2 is secured to the electric wire 3 using a securing member 30 such as a dead-end fastener. On the first utility pole 4a side, the rope 2 near the first utility pole 4a is removed from the drum 51 by cutting it, and the end is terminated with a compression terminal or the like and secured to the electric wire 3 using a securing member 30 such as a dead-end fastener. Note that the securing of both ends of the rope 2 to the electric wire 3 can be performed by securing it to the second utility pole 4b first, as described above, and then securing it to the first utility pole 4a, or vice versa. If personnel allocation is not an issue, the ropes can be secured simultaneously. By securing both ends of the rope 2 to the first utility pole 4a and the second utility pole 4b in this way, the electric wire 3 can be prevented from falling to the ground even if it breaks. Furthermore, when the rope 2 is a spiral rod or a snow-melting wire made of a magnetic material with a low Curie point, wrapping it around an overhead power transmission line can effectively prevent snow from adhering to the power line.

[0079] Furthermore, the distance between utility poles 4a, 4b typically installed in urban areas is 30 to 40 m, and the total weight of the electric wire 3 per pole between utility poles 4a, 4b is approximately 30 kg. Therefore, under these conditions, the winding conditions and winding manner of the rope 2 that can support a broken or other electric wire 3 are preferably controlled so that the number of rotations per unit time of the drum 51 is 0.7 to 1.1 times the number of windings (number of rotations) per unit time of the rotating body 71 of the rope winding device 6, i.e., the ratio of the number of rotations of the drum 51 to the number of rotations (number of windings) of the rotating body 71 per unit time is 0.7 to 1.1, and the winding pitch of the rope 2 is preferably controlled to 1 / 3 to 1 / 1 (m), in other words, 3 turns / 1 m to 1 turn / 1 m.

[0080] If the ratio of the rotation speed of the drum 51 to the rotation speed (number of windings) of the rotating body 71 per unit time falls below 0.7, the electric wire 3 may be wound tighter by the rope 2 too quickly, and the rope winding device 6 may not be able to move. On the other hand, the rotation of the drum 51 may become uneven due to its inertia, and therefore the ratio of the rotation speed of the drum 51 to the rotation speed (number of windings) of the rotating body 71 per unit time may exceed 1.0, but if it exceeds 1.1, the electric wire may come loose too quickly and the electric wire may not be able to be wound spirally.

[0081] The ratio of the rotation speed of the drum 51 to the rotation speed of the rotor 71 per unit time (number of windings) and the winding pitch of the rope 2 can be easily calculated by providing a counter (not shown) to the winding means 7 for measuring the rotation speed of the rotor 71 or the winding drive motor 73, since the length of the electric wire 3 around which the rope 2 is wound can be determined from information such as the distance between the utility poles 4a and 4b. Furthermore, by controlling the rotor 71 or the winding drive motor 73 using the rotation speed measured by the counter, the ratio of the rotation speed of the drum 51 to the rotation speed of the rotor 71 per unit time (number of windings) and the winding pitch of the rope 2 can be easily controlled to desired values. The rotation speed of the rotor 71 can be controlled by controlling the rotation speed of the winding drive motor 73, or by changing the gear ratio of a gear 74 or the like that transmits the driving force of the winding drive motor 73 to the rotor 71.

[0082] In this way, in this embodiment, in order to obtain the ratio of the rotation speed of the drum 51 to the rotation speed (number of windings) of the rotating body 71 per unit time and the winding pitch of the rope 2, it is sufficient to control the rotation speed of the winding means 7 (rotating body 71) of the rope winding device 6 and the running speed of the self-propelled means 8.

[0083] In addition, in order to suppress an increase in frictional resistance with the electric wire 3 due to tightening of the rope 2, when the rope 2 is wound around the electric wire 3 with a smaller number of windings (number of rotations) of the rotating body 71 than the target or a larger winding pitch of the rope 2 than the target, leaving some slack, the rope winding device 6 can be left stopped near the second electric pole 4b, and only the winding means 7 (rotating body 71) can be rotated to adjust to the target number of windings (number of rotations) of the rotating body 71 or the target winding pitch of the rope 2.

[0084] In this embodiment, the above-described rope winding system 1 is used as a method for spirally winding the fall prevention or snow accretion prevention rope 2 around the electric wire 3 installed between utility poles 4a and 4b. Therefore, the fall prevention or snow accretion prevention rope 2 can be used, even if it is made of a high-strength wire or the like that has a certain weight that can support the broken electric wire 3, and even if it is a linear rope 2. Furthermore, the process of spirally winding the rope 2 around the electric wire 3 can be performed simultaneously with the winding process and the towing (self-propelled) process, which makes the work extremely efficient and significantly reduces the human burden. Furthermore, the winding process and the towing (self-propelled) process can also be performed by remote control, so the rope 2 can be safely and efficiently wound around the electric wire 3 in a spiral shape even in narrow areas where aerial work vehicles cannot enter, or in ponds, rivers, or farmland (paddy fields) where workers cannot walk under the electric wire 3 to extend the coil. [Explanation of symbols]

[0085] 1. Rope winding system 2. Ropes for preventing falls or snow accumulation 3...Electric wire 30.....Fixing member (dead end fitting) 4, 4a, 4b... Utility poles 5. Rope supply device 50...Fixing means 500 hooks 501···Arm 502···Tsuba 51...Drums 510···Drum body 511···Turntable 6. Rope winding device 7. Winding means 70···Base plate 71, 71a, 71b... Rotating body 710...Body 711···Flange part 712 Magnet 72, 72a, 72b···Housing 720 Roller 73 Winding drive motor 74 Gear 8...Self-propelled means 80.....Housing 81····Opening cover 82...Wheel 83 Self-propelled drive motor P...Rotation axis

Claims

1. A rope supply device and a fall prevention device drawn out from the rope supply device a rope winding device that moves along the electric wire while winding a stop or snow accretion prevention rope spirally around the outer periphery of the electric wire, The rope supply device is a fixing means for fixing the rope supply device to the electric wire; a drum rotatably supported by the fixing means and holding the wound fall prevention or snow accretion prevention rope; The rope winding device is two or more wheels that rotate along the electric wire; a self-propelled drive motor that drives at least one of the wheels; and a self-propelled means having a rotating body that holds the tip of the fall prevention or snow accretion prevention rope and rotates in the circumferential direction of the electric wire; a winding drive motor that drives the rotating body; and a winding means having a rope winding mechanism.

2. The rope winding system according to claim 1, characterized in that the rope supply device is arranged in a vertical plane in which the rotation axis of the drum intersects the electric wire within a range of 0±45 degrees.

3. 3. The rope winding system of claim 2, wherein the rotation axis of the drum is oriented vertically in a vertical plane that intersects the wires and is parallel to the wires.

4. 3. The rope winding system according to claim 2, wherein the radius of the drum is the same as or greater than the winding radius of the fall prevention or snow accretion prevention rope around the rotating body.

5. The rope winding system described in claim 2, characterized in that the number of rotations per unit time of the drum is controlled to be 0.7 to 1.1 times the number of windings (number of rotations) per unit time of the rotating body of the rope winding device.

6. The rope winding system according to claim 5, characterized in that the winding pitch of the fall prevention or snow accretion prevention rope is controlled to be 1 / 3 to 1 / 1 (m).

7. 2. The rope winding system according to claim 1, wherein the drum is rotatably supported on the fixing means via a plurality of rollers or a plurality of balls.

8. The rotor has a cylindrical body, and can be attached to and detached from the electric wire by dividing the body into two parts using a magnet so that the body can be attached to and detached from the electric wire; and The rope winding system according to claim 1, wherein the outer periphery of the body is rotatably supported by a housing.

9. the housing has a plurality of rollers or a plurality of balls on the inner surface of the housing for supporting the outer periphery of the rotating body; and 9. The rope winding system according to claim 8, wherein the rope winding system is divided into two parts so that it can be detachably attached to the outer periphery of the rotating body.

10. A method for spirally winding a rope for preventing falling or snow accretion around an electric wire installed between a first electric pole and a second electric pole using the rope winding system according to any one of claims 1 to 9, a step of fixing a rope supplying device, which includes a fixing means for fixing to the electric wire and a drum that is supported by the fixing means so as to be horizontally rotatable and that holds a wound-up rope for fall prevention or snow accretion prevention, to a first utility pole side of the electric wire; a step of installing a rope winding device on the electric wire adjacent to the first utility pole side of the rope supply device, the rope winding device comprising: self-propelled means having two or more wheels that rotate along the electric wire and a self-propelled drive motor that drives at least one of the wheels; and winding means that holds the tip of the fall prevention or snow accretion prevention rope and has a rotating body that rotates in the circumferential direction of the electric wire and a winding drive motor that drives the rotating body; a step of fixing a tip of the fall prevention or snow accretion prevention rope to the rotating body so that the winding direction of the fall prevention or snow accretion prevention rope wound around the drum coincides with the rotation direction of the rotating body; a step of turning on a power source of the rope winding device to rotate the rotating body by the winding drive motor to spirally wind the fall prevention or snow accretion prevention rope around the electric wire, and rotating the wheels by the self-propelled drive motor to self-propel the rope winding device on the electric wire from the first electric pole toward the second electric pole; and A rope winding method characterized by including a step of stopping the winding means and the self-propelled means by turning off the power supply of the rope winding device when the rope winding device reaches the side of a second utility pole.

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