Accessories

Abstract

To provide a fastening device that can secure various heavy objects to a tower column with chains to prevent them from sliding off, and that can secure the objects in a way that distributes the load even when large forces are applied to them, so that the tower column bears the burden. [Solution] A fastening device for fastening a heavy object 30 to a tower column 4 for towing an object outside the transmission tower 2 to a required position on the transmission tower 2, comprising: a suspension device 67 for suspending the heavy object 30 on the arm portion 3 of the transmission tower 2; a tower column support member 51 having a channel shape with a curved portion 51a that abuts against the tower column 4; a chain 53 with bolts 54 connected to both ends, which, when wrapped around the tower column, is passed through bolt holes at both ends of the connecting surface portion of the tower column support member 51, and then nuts 55 are tightened on the bolts 54, thereby working in cooperation with the tower column support member 51 to fasten and fix the tower column support member 51 to the tower column; and a chain link connecting the tower column support member 51 and the device body 31 at least one point.

Description

Technical Field

[0001] The present invention relates to, for example, a fastening device for a heavy object, and particularly to a fastening device for fastening a wire traction device, which is a heavy object for, for example, pulling and fastening an overhead power cable outside a transmission tower to a required height of a tower column, to the tower column.

Background Art

[0002] FIG. 8 shows a fastening device for attaching a wire traction device to a tower column of a transmission tower according to a first conventional example. In this device, on the ground beside the transmission tower 2, there are installed a wire traction device (for example, a crawler winch) 6, a generator 7 for supplying power to an induction motor, a weight 8 (mooring means) for firmly fixing the position of the wire traction device 6, and a control device 9. A plurality of pulleys 10, 11, 12 for guiding the wire 5 fed out from the wire winding drum 6a and winding it up to the tip of the arm portion 3 of the transmission tower 2 are attached to the lower part, upper part, and lower part of the arm portion 3 of the transmission tower 2. The wire traction device 6 has a wire winding drum 6a around which the wire 5 is spirally wound multiple times and an induction motor (not shown) with a brake and clutch for rotationally driving the wire winding drum 6a.

[0003] The wire 5 is drawn out to the tip of the arm portion 3 of the transmission tower 2 and connected to the end of the overhead power line 1 separated from the transmission tower 2. By rotating the wire winding drum 6a by lever operation and winding up the wire 5, the end of the overhead power line 1 that is slack in a state where the tensile force is appropriately increased is configured to be pulled to the insulator 13 which is the connection portion at the tip of the arm portion 3 of the transmission tower 2.

[0004] When pulling the wire 5 by the wire traction device 6, for example, the rotation of the wire winding drum 6a in the winding direction is performed by lever operation. At this time, while monitoring the value of the speed display portion that displays the wire winding speed of the wire winding drum 6a which is displayed in relation to the wire 5 traction force in the control device 9, the traction is performed so that a tension of a predetermined value or more does not act on the overhead power line 1.

[0005] Figure 9(A) shows a wire pulling device for lifting, relating to a second conventional example. This wire pulling device 60 for lifting is a winch having a device body 61 and an induction motor 62. Figure 9(B) is a longitudinal cross-sectional view of the lifting winch shown in Figure 9(A). The device body 61 has a wire pulling mechanism that includes a rope sheave 63 that winds the wire in less than one turn, a wire winding roll 65 provided at one of the swinging ends of a bent swing ring 64, and a grip roll 66 provided at the other swing end of the bent swing ring 64. The rope sheave 63 is rotationally driven by the induction motor 62, and the induction motor is powered by a generator (not shown) installed on the ground and controlled by a motor controller (not shown) installed on the ground. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2023-66127 [Patent Document 2] Japanese Patent Application Publication No. 58-136209 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] If, during the operation, the overhead power line is pulled in such a way that tension exceeding a predetermined value is applied, and the end of the overhead power line is connected to the insulator at the tip of the transmission tower's arm, it could lead to a major accident such as the transmission tower collapsing or the arm breaking due to strong winds during a typhoon or low pressure system. Therefore, when pulling overhead power lines to connect them to transmission towers, it is extremely important to ensure that the overhead power line is in a sagging state so that tension exceeding a predetermined value is not applied to it.

[0008] In this regard, according to the conventional technology shown in Figure 8, the wire winding drum 6a is controlled by switching a swing lever attached to the wire winding drum 6a between an upright and a downed position, which is linked to the on / off switching of the induction motor and the brake, switching the drive stop and rotation drive of the wire winding drum 6a. The induction motor is rotated by an electromagnet in the stator, and only the speed can be adjusted. Because the rotor has a large inertia and the rotation start and stop operations are slow, the control is complex. Therefore, when winding the wire 5, the operator of the wire traction device on the ground repeatedly switches the swing lever between an upright and a downed position while monitoring the value of the motor rotation speed display. In addition, a monitor on the tower monitors the traction status of the wire 5, and the operator of the wire traction device communicates with the monitor on the tower via radio. For this reason, considerable skill is required to properly control the traction of the overhead power transmission line 1.

[0009] Furthermore, according to the conventional technology shown in Figure 8, the distance between the wire pulling device 6 and the tensioning position of the overhead transmission line 1 on the transmission tower 2 is several tens of meters, requiring a wire several tens of meters long; since the wire several tens of meters long is wound up via multiple pulleys 10, 11, and 12, there are many dangerous points where the wire 5 has an inner angle; at times, it is necessary to tension up to four wire pulling devices 6 and eight wires 5, requiring a large number of personnel and time; and communication between the tower and the ground is done by radio, which carries the risk of signal errors due to interference.

[0010] When a conventional wire traction device for lifting, as shown in Figure 9, is installed on the top of a power transmission tower, the rotational drive means for the rope sheave, which winds the wire in less than one turn as part of the wire pulling mechanism, is an induction motor. Therefore, only the winding speed of the rope sheave can be adjusted, and, as with the conventional technology shown in Figure 6, the rotor has a large inertia and the rotation start and stop operations are slow, making the control complex.

[0011] Therefore, the inventors of this invention aimed to solve the problems of the prior art by developing a lightweight wire traction device that can be easily lifted and installed on top of a tower, as an alternative to wire traction devices installed on the ground.

[0012] In that case, it would not be practical to permanently weld mounting bases for wire traction devices to the tower column at a total of six lower sections corresponding to the three-tiered arm sections that extend outwards on both sides of the transmission tower, and the construction costs would be extremely high.

[0013] Therefore, we considered a structure in which the wire pulling device is attached to the tower column instead of a mounting base. First, because the center of gravity of the wire pulling device (the combined center of gravity of the wire retraction mechanism, reduction gear, and servo motor) is greatly off-center, it is difficult to keep the mounting surface of the device body horizontal even if the middle of the upper surface of the device body is suspended from the upper arm. Therefore, assuming that the wire pulling device will tilt when suspended from the arm, we considered attaching the wire pulling device suspended from the arm to the tower column. In this case, it is also difficult to attach the wire pulling device directly to the tower column, so we considered installing a channel-shaped fixing part on the tower column that is easy to attach and detach, and attaching the wire pulling device to this fixing part.

[0014] Next, we conducted a detailed examination. We conceived of fixing the channel-shaped fixing parts at both ends of a chain that wraps around the tower column, thereby securing the channel-shaped fixing parts to the tower column. These fixing parts would serve as easily attachable and detachable fixing points for the six lower sections corresponding to the three-tiered arm sections extending from both sides of the transmission tower. However, it became clear that the diameter of the tower column decreases as it gets taller, and that a configuration was needed that would allow for changes in the chain length to accommodate the change in the tower column's diameter. Furthermore, it was recognized that measures were needed to prevent the chain from easily slipping off even if it was tightly wrapped around the tower column.

[0015] Next, the method for attaching the wire pulling device to the channel-shaped fixing part that is installed on the tower column for attachment and removal was considered. The conditions to be considered were that the wire pulling device must be suspended by the arm part and then attached to the fixing part on the tower column; the main body of the device must be attached to the fixing part on the opposite side from the direction in which the wire is paid out from the wire pulling device; and the wire pulling device must not shake even if the reaction force when the wire is pulled fluctuates greatly, by ensuring that the reaction force when the wire is pulled is transmitted in a straight line to the fixing part, with at least one point of the fixing part and one point of the main body of the pulling device connected.

[0016] The present invention was made to solve these problems, and aims to provide a fastening device that can fasten various heavy objects to a tower column with chains so that they do not slide off, and that fastens the heavy objects in such a way that even if a large force acts on them in a direction away from the tower column, the tower column bears that large force, thereby enabling the fastening of heavy objects to be stable and not swayed at high altitudes. [Means for solving the problem]

[0017] The fastening device according to the first aspect of the present application, in order to achieve the above objective, comprises a suspension device for suspending a heavy object from the upper arm portion; a tower column support member having a channel shape with a pair of horizontally extending upper and lower parallel surfaces and a connecting surface integrally connecting the two, and a curved portion formed in the middle of the upper and lower parallel surfaces that abuts against the tower column; a chain with bolts connected to both ends, through which each bolt is passed through bolt holes drilled at both ends of the connecting surface when the tower column is wound in a taut state, and then nuts are tightened on the bolts, thereby working in cooperation with the tower column support member to fasten and fix the tower column; and a chain link connecting the tower column support member and the base portion of the device body at least at one point.

[0018] In a second aspect of the present application, the heavy object may be a wire traction device in the first embodiment described above.

[0019] In a third aspect of the present application, the wire traction device may be an electric winch in the first embodiment described above.

[0020] In a fourth aspect of the present invention, in the first aspect described above, the chain and the bolt are connected by a shortening clutch interposed between them, and the connection position between the chain and the shortening clutch can be changed so that the chain can be wrapped around the tower column under tension regardless of the diameter of the tower column.

[0021] In a fifth aspect of the present application, in the fourth aspect described above, the shortening clutch may have a first bifurcated portion at one end, the ring-shaped end of the bolt being sandwiched in the first bifurcated portion, and a first connecting pin being passed between a pin-through hole provided at one end and the ring-shaped end; and a bifurcated hook portion at the other end, the chain component link at a required position, which is one element of the chain being sandwiched in the bifurcated hook portion, and a second connecting pin being passed between a pin-through hole provided at the other end and the chain component link at a required position.

[0022] In a sixth aspect of the present invention, in the first aspect described above, the lower side of the chain, which is wrapped around the column in a taut state, may be configured to prevent the chain from slipping off the column by providing a bending member that abuts the column at at least two points in the circumferential direction, and a high-tension band that is engaged with one end and the other end of the bending member and fastened to the column via a buckle when wrapped around the column, wherein the column support material is placed on top of the bending member.

[0023] As a seventh aspect of the present application, in the above first aspect, as a means for preventing the chain from slipping off the tower column on the lower side of the chain that is wound around the tower column, it is engaged with one end and the other end of the tower column contact member, and the tower column contact member is in contact with the tower column. It may be configured to have a high-tension band that winds around the tower column once and tightens it before the chain.

[0024] As an eighth aspect of the present application, in the above first aspect, semi-circular seat grooves are recessed on both end side back surfaces of the connecting surface portion of the tower column contact member, and further, the bolt through holes are drilled as long holes so as to coincide with the center of the semi-circular seat grooves. A half washer is accommodated in the semi-circular seat groove, the bolt is passed through the bolt through hole and the half washer, and the nut is tightened. Thus, regardless of the diameter of the tower column, the chain is kept straight until it wraps around the tangent position of the tower column from both ends of the tower column contact member, and the chain and the bolt are kept straight. It may be configured.

Advantages of the Invention

[0025] According to each aspect of the present invention, various heavy objects can be tied with a chain so as not to shift and fall with respect to the tower column, and even if a large force in the direction of separating from the tower column acts on the heavy object, the large force can be applied to the tower column. It is possible to provide a tying device that can tie heavy objects so as to be burdened, and thus can realize a tying of heavy objects that does not sway at a high place and is in a stable state.

Brief Description of the Drawings

[0026] [Figure 1] It is a schematic view of a tying device to a tower column of a power transmission tower of a wire traction device according to an embodiment of the present invention. [Figure 2] It is a perspective view of a wire traction device related to a tying device to a tower column of a power transmission tower of a wire traction device according to an embodiment of the present invention. [Figure 3] It is a front view of different operating states of the wire traction device shown in FIG. 2. [Figure 4A]This is a perspective view showing the attachment structure of the main body of a wire traction device to a transmission tower column according to an embodiment of the present invention, in which a bent member is pressed against the tower column with a high-tension band. [Figure 4B] This is a horizontal cross-sectional view showing the state in which a bent member is pressed against the tower column with a high-tension band, relating to the attachment structure of the device body of the attachment device for a wire traction device to a power transmission tower column according to an embodiment of the present invention. [Figure 4C] This is a perspective view relating to the attachment structure of the device body of a wire traction device to a power transmission tower column according to an embodiment of the present invention, showing a state in which a tower column support material, which is placed on a bent member fixed to the tower column with a high-tension band, is tightened and fixed to the tower column with a chain. [Figure 4D] This is a perspective view of a different location from Figure 4C, relating to the attachment structure of the device body of the attachment device for a wire traction device to a power transmission tower column according to an embodiment of the present invention. [Figure 4E] This is a perspective view of a different location from Figure 4C, relating to the attachment structure of the device body of the attachment device for a wire traction device to a power transmission tower column according to an embodiment of the present invention. [Figure 5] The present invention relates to the attachment structure of the device body of the attachment device for a wire traction device to a power transmission tower column according to an embodiment of the present invention, where Figure 5(A) is a horizontal cross-sectional view showing the state in which the tower column backing material is fastened and fixed to the tower column with a chain when the tower column diameter is at its maximum, Figure 5(B) is a horizontal cross-sectional view showing the state in which the tower column backing material is fastened and fixed to the tower column with a chain when the tower column diameter is at its minimum, Figure 5(C) is a detailed structural diagram for explaining the components for adjusting the length of the chain, Figure 5(D) is a perspective view of the crescent-shaped counterbore at the end of the tower column backing material, Figure 5(E) is a perspective view of the crescent-shaped washer, and Figure 5(F) is a perspective view showing the state in which the crescent-shaped washer is housed in the crescent-shaped counterbore, a bolt is passed through the crescent-shaped washer, and a nut is tightened. [Figure 6A] This is a perspective view showing the attachment structure of the main body of a wire traction device to a transmission tower column according to an embodiment of the present invention, in which the tower column support material is fastened and fixed to the tower column with a chain. [Figure 6B]This is a perspective view of a different location from Figure 6A, relating to the attachment structure of the device body of the attachment device for a wire traction device to a power transmission tower column according to an embodiment of the present invention. [Figure 6C] This is a perspective view of a different location from Figure 6A, relating to the attachment structure of the device body of the attachment device for a wire traction device to a power transmission tower column according to an embodiment of the present invention. [Figure 7] Figures 4A to 4E show a perspective view of a prototype example (not a conventional example) that precedes the development of a structure with only one link in the chain link as shown in the embodiment of the present invention. [Figure 8] This diagram shows a device for attaching a wire traction device to the tower column of a power transmission tower, relating to the first conventional example. [Figure 9] Figure 9(A) shows a lifting winch relating to a second conventional example. Figure 9(B) is a longitudinal cross-sectional view of the lifting winch. [Modes for carrying out the invention]

[0027] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0028] Figure 1 shows a schematic overall view of the attachment device according to this embodiment.

[0029] The attachment device according to the present invention is intended for various heavy objects that may be attached to high places on tower columns. In this embodiment, the device body 31 is suspended from the arm portion 3 of the transmission tower 2 by a suspension device 67 and attached to the tower column 4, and is a wire traction device (tower winch) 30, which is a heavy object.

[0030] The attachment device according to the present invention comprises a component on which the wire pulling device 30 is suspended by the arm portion 3, and a component on which the wire pulling device 30 is attached to the tower column 4. Details thereof will be explained after a general description of the configuration of the wire pulling device 30.

[0031] The wire pulling device 30 according to this embodiment is configured to pull the end of the overhead power transmission line 1 to the position of the insulator 13 to be connected to the arm portion 3 by unwinding the wire 5, guiding the wire 5 along the lower end of the upper arm portion 3, winding it around a pulley 12 attached to the arm portion 3, guiding it to the tip of the arm portion 3, and then unwinding the wire 5 from the wire pulling device 30.

[0032] Subsequently, the wire traction device 30 is disconnected from the wire 5 and the overhead power transmission line 1. The overhead power transmission line 1 is configured such that one end of the arm portion 3 is fixed to the tip of the arm portion 3, and the other end is connected to a series of insulators 13 that extend in the direction of the overhead power transmission line 1.

[0033] The wire pulling device 30 comprises a device body 31, a wire pulling mechanism 33 including a rope sheave 34 around which the wire 5 is wound and rotated (less than one turn), a reduction gear 44 whose output shaft is connected to the rotating shaft 35 of the wire pulling mechanism 33, and a servo motor 45 whose output shaft is connected to the input shaft of the reduction gear 44. The wire pulling mechanism 33, the reduction gear 44, and the servo motor 45 are supported by the device body 31.

[0034] The servo motor 45 is equipped with a brake to lock the rotating shaft 35 when the wire pulling device 30 is not in operation, thereby preventing the wire 5 from being extended. However, if the reduction ratio of the reducer 44 is set to a sufficiently large value, the static load on the motor rotor will prevent the reducer 44 from free-rotating when not in operation, so the servo motor 45 does not need to be equipped with a brake. Furthermore, a clutch can be provided between the rotating shaft 35 of the wire pulling mechanism 33 and the output shaft of the reducer 44 so that it is always on during winch operation. In this configuration, when the rope sheave 34 needs to pull the wire 5 in the direction of the overhead power line 1, the wire pulling device 30 is deactivated and the clutch is turned off, allowing the rope sheave 34 to rotate freely and pull the wire 5 in the direction of the overhead power line 1.

[0035] Furthermore, the wire traction device 30 includes a battery 46 located near the wire traction device 30 at the same height for powering and controlling the servo motor 45, and a servo motor control device 47 located near the wire traction device 30 at the same height. The servo motor control device 47 can control the rotational speed and torque of the rope sheave 34.

[0036] [Wire pulling mechanism 33] Figure 2 is a perspective view of a wire traction device 30 according to an embodiment of the present invention (including the reduction gear 44 and servo motor 45). Figure 3 is a front view of the wire traction device shown in Figure 2 in different operating states (excluding the reduction gear and servo motor).

[0037] As shown in Figures 2 and 3, the wire retraction mechanism 33 includes a rope sheave 34 whose center is fixed to a rotating shaft 35 whose rotating shaft 35 is pivotally supported in an axial hole (not indicated) of the device body 31, a wire guide section 36 provided at a required distance from one side of the wire retraction and discharge side from the rope sheave housing space 32, a roller seesaw section 37 provided between the rope sheave 34 and the wire guide section 36, and a safety cover 38 that closes the open side of the rope sheave 34.

[0038] The rope sheave 34 is housed in a rope sheave housing space 32, which is a recess provided on one outer surface of the device body 31, and the rotating shaft 35 is pivotally supported in an axial hole (not indicated) of the device body 31, with the opposite end of the rotating shaft 35 on the device body 31 connected to the output shaft of the reduction gear 44.

[0039] The wire guide section 36 includes a pair of vertical guide rolls 36a spaced several millimeters to tens of millimeters apart from the outer diameter of the wire cross-section, a pair of horizontal guide rolls 36b spaced vertically by a required distance to correspond to the upper and lower parts of the pair of vertical guide rolls 36a, and a guide roll support block 36c that supports the pair of vertical guide rolls 36a and the pair of horizontal guide rolls 36b. The guide roll support block 36c may be part of the main body 31 of the device.

[0040] [Roller seesaw section 37] The roller seesaw section 37 includes a bent oscillating ring 40 provided between the rope sheave 34 and the wire guide section 36, with an intermediate bent section pivotally supported by a pivot shaft 39 protruding from the main body of the device 31; a wire winding roll 41 provided at one of the oscillating ends of the bent oscillating ring 40; and one or more grip rolls 42 provided at the other oscillating end of the ring. In the illustration, four grip rolls 42 are provided.

[0041] The state shown in Figure 2 is when the wire winding roll 41 is close to the rope sheave 34 and the grip roll 42 is separated from the rope sheave 34, and the state shown in Figure 3 is when the wire winding roll 41 is separated from the rope sheave 34 and the grip roll 42 is close to the rope sheave 34. When the grip roll 42 is close to the rope sheave 34 and separated from the rope sheave 34, the wire 5 is pressed by the grip roll 42 and fitted into the circumferential groove of the rope sheave 34 so as not to move relative to it, and can move together with the rotation of the rope sheave 34.

[0042] [How to attach wire 5] When the wire 5 is guided above the wire traction device 30 and connected to the overhead power transmission line 1, it is passed from the outside upper part of the wire guide section 36 between a pair of horizontal guide rolls 36b, then sequentially between a pair of vertical guide rolls 36a, then wound around the inside of the wire winding roll 41, wound around the V-shaped circumferential groove from the upper side of the outer surface of the rope sheave 34 in less than one turn, passed inside the four grip rolls 42 on the lower side of the outer surface of the rope sheave 34, passed between a pair of vertical guide rolls 36a of the wire guide section 36, then between a pair of horizontal guide rolls 36b, and then passed downwards by gravity, where a wire-preventing locking member 48 is tightened at the end of the hanging wire.

[0043] When the wire 5 is connected to the overhead power line 1, tension is generated in the wire 5. This causes the wire winding roll 41 to move away from the rope sheave 34, and the grip roll 42 to move closer to the rope sheave 34 and press against the wire 5, so that the wire 5 is locked in the V-shaped groove of the rope sheave 34. This locked state of the wire 5 has the function of preventing the rope 5 from being paid out in the direction of the overhead power line 1 when the motor is not operating and the brake is applied, provided that the reduction gear 44 or servo motor 45 has a brake. In addition, when the motor is operating and the brake is not applied, the rope sheave 34 is driven to rotate counterclockwise, and the rope sheave 34 has the function of winding up the wire 5.

[0044] [Relationship between the outer diameter of the rope sheave 34, the inner diameter of the rope sheave housing space 32, the outer diameter of the wire 5, and the cover 38] The wire 5 is, for example, 10-15 mm in diameter and is wound in less than one turn in the V-shaped circumferential groove on the circumferential surface of the rope sheave 34. The wire 5 is wound on the rope sheave 34 such that it is, for example, 2-3 mm larger than the outer diameter of the outer cross-section of the rope sheave 34 (protrusion dimension 2-3 mm). The gap between the outer diameter of the outer cross-section of the rope sheave 34 and the side wall forming the rope sheave housing space 32 is, for example, 5 mm. This gap is such that even if the portion of the wire 5 wound in less than one turn bulges outward when not being pulled, the wire 5 cannot escape from the recess on the circumferential surface of the rope sheave 34. Providing the cover 38 is necessary to insert the rotating shaft 35 through the shaft hole (not shown) provided in the device body 31 to house the rope sheave 34 in the rope sheave housing space 32 and then close the rope sheave housing space 32. Furthermore, when a cover 38 is provided, the gap between the outer diameter of the cross-sectional portion of the side surface of the rope sheave storage space 32 and the outer diameter of the outer cross-sectional portion of the rope sheave 34 can be made larger than the outer diameter of the cross-sectional portion of the wire 5. This prevents the rope from coming off the rope sheave 34 even if the wire 5, which is wound around the rope sheave 34 in less than one turn, loosens when not being pulled. The cover 38 also has the function of preventing the worker's hands and fingers from getting caught in the wire 5.

[0045] [Function of the wire detachment prevention locking member 48] If, by any chance, an electrical error occurs that causes the motor to stop and the motor's output shaft to rotate freely (the brake is not engaged), the rope sheave 34 may rotate freely clockwise even if the wire 5 is locked to the rope sheave 34 by the grip roll 42, potentially causing the wire 5 to slip out. To prevent this, the wire slip-out prevention locking member 48, which is tightly attached to the wire 5, cannot pass between the pair of horizontal axis guide rolls 36b of the wire guide section 36, thereby preventing the wire 5 from slipping out of the wire pulling device 30.

[0046] [Driving the wire traction device 30] With the wire 5 connected to the overhead power line 1, the servo motor 45 is driven via the servo motor control device 47, causing the rope sheave 34 to rotate counterclockwise in Figure 3, thereby enabling the wire 5 to be pulled in. When the servo motor 45 reaches a predetermined torque, the servo motor control device 47 can instantly stop the servo motor 45 from driving and the brake is activated, so the rope sheave 34 can be instantly stopped from rotating, thereby automatically setting the pulling force of the wire 5 to the overhead power line to the required value.

[0047] [Differences between conventional ground winches and the wire traction device of the present invention] To install a winch on top of transmission tower 2, the winch needs to be lightweight. Ground winches have a multi-winding drum and a heavy induction motor, making them unsuitable for lifting and installing on top of transmission towers. In contrast, the wire pulling device 30 has a wire pulling mechanism 33 that can wind the wire 5 onto the rope sheave 34 in less than one turn, and a lightweight servo motor 45. As a result, the total weight of the winch is significantly lighter than conventional winches, making it suitable for lifting and installing on top of transmission tower 2. Therefore, the installation work of the wire pulling device 30 can be easily performed.

[0048] [Relationship between traction control of overhead power lines and the characteristics of induction motors and servo motors] Induction motors do not have permanent magnets in the rotor; they rotate using electromagnets in the stator, and only the speed can be adjusted. Because the rotor has a large inertia and the rotation start and stop movements are slow, control is complex, and considerable skill is required to rotate the winding drum and wind up and pull the wire 5 using the lever operation. In contrast, servo motors are equipped with encoders and perform control by feeding back the rotational position and speed of the motor shaft. They have a small inertia, move quickly, quickly and accurately, and can control position / speed / torque, providing continuous repetitive operation and high reliability. Using a servo motor instead of a conventional induction motor eliminates the need for skill in pulling the wire 5, and allows for quick and easy pulling of overhead power lines into the arms of transmission towers.

[0049] The wire pulling device 30 used in the present invention is composed of a wire retraction mechanism 33, a reduction gear 44, and a servo motor 45. The wire retraction mechanism 33 is a significantly lighter component that replaces the winding drum of a conventional ground winch, and the servo motor 45 is a lighter component that replaces the induction motor of a conventional ground winch. As a result, the total weight of the winch is significantly reduced, making it easy to lift and install on top of the power transmission tower 2. The wire pulling device 30 of the present invention can rise on its own when the wire 5 is unwound and the wire 5 is wound up by connecting the unwound end of the wire 5 to the top of the power transmission tower 2. After installing the wire pulling device 30 on top of the power transmission tower 2, the wire 5 can be unwound and connected to a battery 46 and a servo motor control device 47, allowing the battery 46 and the servo motor control device 47 to be lifted to the same height as the wire pulling device 30.

[0050] The power supply means for the servo motor 45 used in this embodiment of the present invention is a large-capacity secondary battery (for example, a lithium battery), which is lighter and more compact than the generators used in conventional ground winches, is easy to lift and install at the same height as the wire pulling device 30, and because the distance between the wire pulling device 30 and the secondary battery is short, the wiring for power supply is short and the wiring work is easy. Alternatively, a generator may be installed on the ground instead of the battery 46.

[0051] According to the present invention, since the battery 46 and the servo motor control device 47 are located near the wire traction device 30 at the same height, the control cord can be shortened, and the problems of the prior art can be solved.

[0052] [Characteristic components of the present invention] The configuration described below is a characteristic component of the present invention, which is the attachment device. The attachment device consists of a component on which the wire pulling device 30 is suspended by the arm portion 3, and a component on which the wire pulling device 30 is attached to the tower column 4.

[0053] The attachment device for securing the wire traction device 30 to the tower column comprises a lifting device 67 that hoists the wire traction device 30 on the transmission tower 2 to connect the upper arm portion 3 with the upper part of the device body 31; a tower column support member 51 which has a channel shape with a pair of horizontally extending upper and lower parallel surface portions 51a, 51a and a connecting surface portion 51b that integrally connects the two, and a curved portion 51c formed in the middle of the upper and lower parallel surface portions 51a, 51a that abuts against the tower column 4; a chain 53 to which bolts 54 are connected at both ends, and when the tower column 4 is wound in a taut state, each bolt 54 is passed through elongated holes (bolt holes) 69 drilled at both ends of the connecting surface portion 51b, and then nuts 55 are tightened on the bolts 54, thereby working in cooperation with the tower column support member 51 to tighten and fix the tower column 4; and the tower column support member 51 and the base portion 31a of the device body 31 are connected at least at one point by a link that allows relative displacement in the vertical direction.

[0054] This distinctive component allows the wire traction device to be attached to the tower column 3 of the power transmission tower 3 in a way that prevents it from slipping off when suspended by the upper arm, and that the reaction force during wire traction is transmitted linearly to the tower column. As a result, a stable attachment is achieved in which the wire traction device does not sway.

[0055] [Structure for attaching the main body of the device 31 to the tower column 4] The structure for attaching the wire traction device 30 to the tower column 4 will be explained with reference to Figures 4A-4E, 5(A)-(F), and 6A-6C.

[0056] [Lifting of the wire traction device 30 by the lifting device 67] The mounting structure of the device body 31 to the tower column 4 is realized after the device body 31 is in a lifted state. In this embodiment, the device body 31 is suspended by a single lifting device 67. First, in order to support the wire traction device 30 in a lifted state, the upper part of the device body 31 is lifted by a single lifting device 67 suspended from the upper arm portion 3 of the wire traction device 30 (see Figure 2). Although the detailed configuration of the lifting device 67 is not shown, it is desirable that it includes, for example, a wire that is locked and hangs down at a required position on the arm portion 3 above the installation position of the wire traction device 30, and a buckle mechanism that allows the length of the wire to be adjusted in order to suspend the wire traction device 30 at an appropriate height. For example, if three lifting devices are used, it will take more time than single lifting, but the bottom surface of the device body 31 can be made to be almost aligned with the horizontal plane.

[0057] [Fixing the bending member 52b and the column support member 51 to the column 4, and connecting the column support member 51 to the main body of the device 31] In this embodiment, regarding the fixing of the column support member 51 to the column 4, the column 4 is tightened with a high-tensile band 52a to wrap around it once, fixing the bending member 52b to the column 4, the column support member 51 which is placed on the bending member 52b is tightened and fixed to the column 4 with a chain 53 made of linked rings, and furthermore, the column support member 51 and the perforated locking portion 31b of the base portion 31a of the device body 31 are connected at one point using a chain link 56 with a chain structure.

[0058] The high-tensile band 52a prevents the tower column support member 51 from slipping off the tower column 4. For the high-tensile band 52a, it is preferable to use a lashing belt with a high coefficient of friction and tensile strength, making it suitable for preventing slippage. The chain 53 ensures the firm fixation of the tower column support member 51 to the tower column 4 when the overhead power transmission line is being pulled.

[0059] [Attachment of the bending member 52b to the tower column 4] The configuration for attaching the bending member 52b to the tower column 4 includes a bending member 52b that abuts the tower column 4 at least two points in the circumferential direction, a high-tension band 52a that is inserted through openings provided in the bent pieces at both ends of the bending member 52b and has its middle portion overlapped with the outer surface of the bending member 52b, and a buckle 52c provided at one end of the high-tension band 52a that is adjustable to a length that allows the other end of the high-tension band 52a to be inserted and tightened onto the tower column 4.

[0060] As a modified example, the tower column support material 51 has a high-tension band that engages with one end and the other end of the support material 51, and tightens the tower column 4 by wrapping around it once before the chain 53 when the support material 51 is in contact with the tower column 4. Furthermore, it is preferable that the length can be adjusted with a buckle to tighten the tower column 4.

[0061] [Attachment of the tower column support material 51 to the tower column 4] The attachment of the column bracing member 51 to the column 4 includes a column bracing member 51 made of a channel-shaped material with a curved portion 51c formed in the middle of a pair of upper and lower parallel surfaces, the curved portion 51c abutting against the column 4 and extending horizontally, and a chain 53 to which bolts 54 are connected at both ends, and when the column 4 is wrapped in a tensioned state, each bolt 54 is passed through bolt holes drilled at both ends of the column bracing member 51, and then nuts 55 are screwed onto the bolts 54 and tightened to fasten the column 4.

[0062] The column support member 51 is a channel-shaped member with a pair of opposing surfaces arranged vertically, and a pair of curved sections 51c provided in the middle of the pair of opposing surfaces are stably brought into contact with the column 4. First, it is secured to the column 4 with a high-tensile band 52a, and then a chain 53 is wrapped around the column 4. Bolts 54 connected to both ends of the chain 53 are passed through bolt holes at both ends of the column support member 51, and nuts 55 are tightened onto the bolts 54 to fix it to the column 4.

[0063] Regarding the configuration in which the chain 53 tightens and secures the tower column 4, as shown in Figures 5(A) and (B), the outer cross-sectional diameter of the tower column 4 is, for example, a maximum of 406.3φmm and a minimum of 139.8φmm. Therefore, it is necessary to design a configuration that takes into account the way the chain 53 wraps around the tower column 4, considering these differences in size.

[0064] The first configuration ensures that, regardless of the outer cross-sectional diameter of the column 4, the chain 53 extending from both ends of the column backing material 51 wraps around the tangential position of the column 4. This configuration ensures that no bending load is applied to the bolt 54 by ensuring that the centerline of the bolt 54 coincides with the centerline of the chain 53. In this embodiment, as shown in Figure 5(D), crescent-shaped countersunk holes 68 are recessed on the back surface of both ends of the column backing material 51, and elongated holes (bolt holes) 69 are drilled to coincide with the center of these countersunk holes. A crescent-shaped washer 70, shown in Figure 5(E), is housed in the crescent-shaped countersunk hole 68, and the bolt 54 is passed through the elongated hole 69 and the crescent-shaped washer 70, and a nut 55 is tightened (Claim 8).

[0065] The second configuration, as shown in Figures 5(A) and (B), involves changing the length of the chain 53 according to the cross-sectional outer diameter of the tower column 4 (claims 4 and 5). If the chain were to be fixed to a predetermined length and bolts were inseparably connected to the chain links at both ends, the chain could only be tightened for tower columns with a predetermined cross-sectional outer diameter. This would not be suitable for sites where the cross-sectional outer diameter of the tower columns differs.

[0066] Therefore, in this embodiment, the structure is designed so that the chain 53 can be connected to the bolt 54 at appropriate positions so as to wrap around the tower column 4. As shown in Figure 5(C), this connection structure has a shortening clutch 71 (chain retainer) interposed between the bolt 54 and the chain 53. This shortening clutch 71 is connected to the bolt 54 by a first connecting pin 72 and to the chain 53 by a second connecting pin 73 (Claim 4).

[0067] More specifically, the end of the bolt 54 on the shortening clutch side is a ring portion 54a, and the end of the shortening clutch 71 on the bolt side is a bifurcated portion 71a, the ring portion 54a is sandwiched in the bifurcated portion 71a, and the first connecting pin 72 is removably inserted through the pin insertion hole 71a1 provided in the bifurcated portion 71a and the ring portion 54a, thereby connecting the bolt 54 and the shortening clutch 71 (Claim 4).

[0068] Furthermore, the shortening clutch 71 has a bifurcated hook portion 71b at the chain-side end and a pin insertion hole 71a1 in the bifurcated hook portion 71b, and a chain component link 53a at a required position, which is one element of the chain 53, is sandwiched in the bifurcated hook portion 71b, and a second connecting pin 73 is inserted through the pin insertion hole 71b1 and the chain component link 53a, thereby connecting the shortening clutch 71 and the chain 53 (Claim 5).

[0069] [Connection between the tower column support member 51 and the main body of the device 31] The tower column support member 51 and the perforated locking portion 31b of the base portion 31a of the device body 31 are connected at one point using a chain link 56 in a chain structure.

[0070] The chain link 56 only needs to be connected such that the connecting elements provided on the column support member 51 and the connecting elements provided on the device body 31 are connected in such a way that the column support member 51 and the device body 31 are able to move relative to each other. For example, the opposing pair of connecting elements may be plates with bolt holes, with the bolt holes aligned and connected by a shackle, or connected by bolts and nuts, so that the device body 31 can be tilted up and down relative to the column 4. Alternatively, the opposing pair of connecting elements may be plates with bolt holes, with the two bolt holes spaced apart and connected in a chain-like manner by one or more oval rings.

[0071] In this embodiment, the chain link 56 of the chain structure includes, for example, two shackles and one ring, and connects a perforated locking portion 51d provided on the tower column support member 51 to a perforated locking portion 31b provided on the lower side surface of the base portion 31a of the device body 31.

[0072] In this way, by providing a chain link 56 that connects the base portion 31a of the device body 31 to the tower support member 51 fixed to the tower column 4 at one point, bending stress does not occur at the connection point between the tower support member 51 and the base portion 31a of the device body 31 when the overhead power transmission line 1 is pulled by the wire traction device 30, and tensile stress is generated instead, thereby increasing the safety of the connection point.

[0073] On the other hand, as shown in Figure 6, the reason why the tower column support member 51 and the device body 31 are connected by a chain link 56 in one place instead of two will be explained by comparing it with Figure 7, which shows two connection points. Figure 7 is a prototype example (unknown) in which the tower column support member 51 and the device body 31 are connected by two chain links 56a and 56b, rather than a conventional example. What was found in this prototype example is that when the upper part of the device body 31 is connected to the arm part 3 of the power transmission tower with a lifting device 67 and the wire traction device 30 is lifted, the side with the reduction gear 44 and servo motor 45 is on the lower side, and it is in a twisted position relative to the horizontal plane of the lower surface of the base part 31a. As a result, one chain link 56a is in an effective connection state, while the other chain link 56b is in a connection state with play. As a result, it was determined that it is sufficient to provide only one chain link 56a. This does not mean that the case where chain links 56a and 56b are established in two locations is outside the scope of the rights.

[0074] According to the attachment device of this embodiment, the wire traction device 30 can be firmly attached to the tower column 3 of the power transmission tower 2. Furthermore, even if the weight of the reduction gear 44 and servo motor 45 of the wire traction device 30 causes the lower surface of the base portion 31a of the device body 31 to tilt significantly relative to the tower column 4, only tensile force will act between the device and the tower column attachment device 51 (fixing part) 51, thus ensuring a strong and safe attachment.

[0075] According to the attachment device of the present invention, the wire pulling device 30 can be installed at extremely low construction costs by attaching it to a tower column support material (fixing part) 51 fixed to the tower column 4, instead of welding a mounting base to the tower column 4 for the installation of the wire pulling device 30 to a total of six lower parts corresponding to each of the three-tiered arm sections 3 that extend out on both sides of the power transmission tower 2.

[0076] Furthermore, according to the attachment device of the present invention, even if the center of gravity of the wire pulling device 30 (the combined center of gravity of the wire pulling mechanism, reduction gear, and servo motor) is significantly off-center, and it is difficult to maintain the mounting surface of the device body 31 horizontally even if the middle of the upper surface of the device body 31 is suspended from the upper arm, the wire pulling device 30 suspended from the upper arm 3 can be attached to the tower column 4, assuming that the wire pulling device 30 will tilt when suspended from the arm 3. In this case, according to the attachment device of the present invention, even if it is difficult to directly attach the wire pulling device 30 to the tower column 4, a channel-shaped tower column support (fixing part) 51 that is easy to attach and detach can be installed on the tower column 4, and the wire pulling device 30 can be attached to this tower column support 51.

[0077] Furthermore, according to the attachment device of the present invention, a tower column support material 51 that can be easily attached to and removed from the tower column 4 can be fixed to the tower column by fixing it to both ends of the channel-shaped fixing parts at both ends of a chain 53 that wraps around the tower column 4, at a total of six lower parts corresponding to each of the three arm sections 3 that extend out in three stages on both sides of the transmission tower 2. Here, there is a problem that the diameter of the tower column 4 decreases as it gets taller, but the length of the chain 53 can be changed to accommodate the change in the diameter of the tower column 4, and the range from the tangential position of the chain 53 to the tower column 4 to the bolts 54 connected to both ends of the chain 53 can be kept in a straight line, thus enabling good construction of the tower column 4 with the chain 53.

[0078] Furthermore, according to the fastening device of the present invention, the configuration is such that a bending member 52b is placed against the tower column 4 and the bending member 52b is tied to the tower column 4 with a high-tensile band 52a, and then the chain 53 is wrapped once around the tower column 4 to fix the tower column support material 51 and the tower column support material 51 is placed on top of the bending member 52b (Claim 6), or the tower column support material 51 is fixed to the tower column 4 by tying the high-tensile bands 52a fixed to both ends of the tower column support material 51 to the tower column 4 and the chain 53 is tightly wrapped around the tower column 4 (Claim 7), thereby preventing the chain 53 from easily slipping off.

[0079] Furthermore, according to the attachment device of the present invention, a heavy object, such as a wire pulling device 30, can be suspended by the arm portion 3 and then attached to the fixed portion of the tower column 4. The device body 31 can be attached to the tower column support member 51 on the opposite side of the direction in which the wire 5 is unwound from the wire pulling device 30. With one point of the tower column support member 51 and one point of the device body 31 of the wire pulling device 30 connected, the wire pulling device 30 can be prevented from shaking even if the reaction force when the wire 5 is pulled fluctuates greatly, by ensuring that the reaction force when the wire 5 is pulled is transmitted in a straight line to the tower column support member 51, thereby preventing the wire pulling device 30 from shaking.

[0080] The present invention provides a binding device that allows various heavy objects to be bound to a tower column with chains so as not to slip off, and that allows the tower column to bear the force even if a large force acts on the heavy object in a direction away from the tower column, thereby enabling the binding of heavy objects to a stable state without swaying at high altitudes.

[0081] The heavy objects to which the attachment device of the present invention applies are not limited to the wire traction device 30 shown in Figure 1, but also include heavy objects such as the wire traction device 6 and generator 7 shown in Figure 8, as well as other heavy objects such as various devices that need to be installed at high altitudes in temporary construction work. Furthermore, the tower columns are not limited to the tower columns of power transmission towers, but also include, for example, the tower columns of radio towers and various tower columns erected within factories. [Explanation of Symbols]

[0082] 1… Overhead power transmission lines, 2...Transmission towers, 3...Arm section, 4... Tower pillar, 5... Wire, 6…Wire towing device (ground winch), 6a... Wire winding drum, 7... Generator, 8... Weight, 9... Control device, 10, 11, 12...golden wheel, 13... Insulator, 30…Wire towing device (heavy load), 31...Device body, 31a... Base section, 31b... Locking part with hole, 32... Rope sheave storage space, 33...Wire retraction mechanism, 34... Rope sheave, 35... axis of rotation, 36... Wire guide section, 36a... Vertical axis guide roll, 36b... Horizontal axis guide roll, 36c... Guide roll support block, 37... Roller seesaw section, 38...Lid, 39... Pivot axis, 40... Flexible oscillating ring, 41... Wire winding roll, 42... Grip roll, 44...Reducer, 45... Servo motor, 46... Battery, 47…Control device for servo motors, 48… Locking component to prevent wire from coming loose, 51... Tower column support material (fixing part), 51a...Parallel surface part, 51b...Connecting surface part, 51c... Bay area, 51d... Locking part with hole, 52a... High-tension band, 52b...Bending member, 52c...buckle, 53...Chain, 53a... Chain constituent links, 54... Volts, 54a... Ring section, 55... Nut, 56... Chain Link, 56a, 56b...chain links, 60... Lifting winch, 61...Main unit of the device, 62... Induction motor, 63... Rope sheave, 64... Flexible oscillating ring, 65... Wire winding roll, 66... ​​Grip Roll, 67...Hanging equipment, 68... Crescent-shaped countersigma, 69... Slotted hole (bolt hole), 70... Half-moon washer, 71... Shortening clutch, 71a...Forked part, 71a1...Pin insertion hole, 71b... Bifurcated hook section, 71b1...Pin insertion hole, 72...First connecting pin, 73... The second connecting pin.

Claims

1. A lifting device that suspends the upper arm of a heavy object, It has a channel shape having a pair of upper and lower parallel surfaces extending horizontally and a connecting surface that integrally connects the two, and a curved portion formed in the middle of the upper and lower parallel surfaces is a tower column support member that abuts against the tower column, A chain having bolts connected to both ends, which, when the tower column is wrapped in a taut state, passes each bolt through bolt holes drilled at both ends of the connecting surface, and then nuts are tightened onto the bolts, thereby working in cooperation with the tower column support material to tighten and fix the tower column, A chain link connects the tower column support and the base of the heavy object at at least one point. A fastening device characterized by comprising the above.

2. The aforementioned heavy object is a wire traction device, according to claim 1.

3. The attachment device according to claim 1, wherein the wire pulling device is an electric winch.

4. The chain and the bolt are connected by a shortening clutch interposed between them, and the connection position between the chain and the shortening clutch can be changed, so that the chain remains taut around the tower column regardless of the diameter of the tower column. The attachment device according to claim 1.

5. The shortening clutch has a first bifurcated portion at one end, the ring-shaped end of the bolt is sandwiched in the first bifurcated portion, and a first connecting pin is passed through a pin-through hole provided at one end and the ring-shaped end; and has a bifurcated hook portion at the other end, the chain component link at a required position, which is one element of the chain, is sandwiched in the bifurcated hook portion, and a second connecting pin is passed through a pin-through hole provided at the other end and the chain component link at a required position. The attachment device according to claim 4.

6. The lower side of the chain, which is wrapped taut around the column, is provided with a means to prevent the chain from slipping off the column. This means includes a bending member that abuts the column at at least two points in the circumferential direction, and a high-tension band that engages with one end and the other end of the bending member and fastens tightly to the column via a buckle when wrapped around it. The column support material is placed on top of the bending member. The attachment device according to claim 1.

7. The configuration includes a high-tension band that, when the chain is wrapped around the column, is engaged with one end and the other end of the column support material, and tightens around the column once before the chain when the column support material is in contact with the column. The attachment device according to claim 1.

8. The fastening device according to claim 1, wherein crescent-shaped countersunk holes are recessed on the back surfaces of both ends of the connecting surface portion of the tower column backing material, and a bolt hole is drilled as an elongated hole aligned with the center of the crescent-shaped countersunk hole, a crescent washer is housed in the crescent-shaped countersunk hole, the bolt is passed through the bolt hole and the crescent washer and a nut is tightened, thereby keeping the chain in a straight line from both ends of the tower column backing material until it wraps around the tangential position of the tower column, regardless of the diameter of the tower column, and keeping the chain and the bolt in a straight line.

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