TWI818015B - Insulation barrier separation construction method and pole-mounted lifting devices, insulation barrier support tools, tools for fixing utility poles, and hanging tools used in this construction method - Google Patents

Abstract

The present invention provides an insulating rod separation method that can safely separate a plurality of tension-resistant insulating rods installed at different heights without changing the position of the device used for the operation, and a pole-mounted lifting device used in the method. Insulator support tools, tools for fixing utility poles, and hanging tools.

When three three-phase alternating current transmission lines are of different heights, in the insulator separation method for removing unnecessary tension-resistant insulators from overhead wires, first, a cable-containing insulator is formed in parallel with the insulators The branch path of the tensioning device is used to relieve the tension on the insulation barrier side. After the tension applied to the insulating barrier is relaxed, the connecting portion of the insulating barrier is supported by the insulating barrier supporting tool 150 having an insulating barrier engaging portion 154 at the front end. In a state where the insulating barrier is supported by the insulating barrier support tool 150, the connecting part of the insulating barrier is separated, and the lifting belt 4 of the pole lifting device 1 is connected to the support rod of the insulating barrier support tool 150. the middle position. Then, while the insulating barrier support tool 150 is used to auxiliarily support the insulating barrier, the insulating barrier is lifted by the pole-mounted lifting device 1 and separated to a position higher than the pole-mounted lifting device 1 itself.

Description

Insulation barrier separation construction method and pole-mounted lifting devices, insulation barrier support tools, tools for fixing utility poles, and hanging tools used in this construction method

The present invention relates to an insulating barrier separation method for separating a tension-resistant insulating barrier from an erection wire, and a pole-mounted lifting device, an insulating barrier supporting tool, a tool for fixing a utility pole, and a hanging tool used in the method.

Insulators of various shapes are used to insulate overhead electric wires (hereinafter referred to as electric wires) and supporting structures. Among these, tension-resistant insulators are used when connecting to supporting structures such as telephone poles and towers in the direction of tension of the wires. This tension-resistant insulator is generally a form in which a plurality of insulators are connected in series through connecting metal parts.

Although some are equipped with a structure to safely discharge large currents as a lightning strike countermeasure, there are cases where insulation breakdown occurs between the supporting structure and the electric wire, resulting in damage to the tension-resistant insulator.

In this case, the damaged tension-resistant insulator must be replaced. However, as mentioned above, when a plurality of them are connected together, not only the weight will increase, but the overall shape will not be fixed. Therefore, in the The operation is more difficult when working at height.

During the replacement operation, first, the tension applied to the tension-resistant insulator must be released.

Figure 23 shows a conventional method of replacing the tension resistant insulator 317. The tension-resistant insulators 317 are arranged in opposite directions via the metal cross arms 314. Figure 23 shows a case where one of these is replaced. Here, the tension relaxing device 310 is used in order to relax the tension applied to the tension-resistant insulator 317 .

The tension relaxing device 310 has a tension support rod 311 that functions as a support rod, and a tension operating member 312 that swingably supports the tension support rod 311.

One end of the tension support rod 311 is fixed to the metal cross arm 314 side, and the tension operating member 312 is connected to the high-voltage wire 316 via a tension clamp 315 . In such a structure, if the tension operating member 312 is swung relative to the metal cross arm 314 side, the tension applied to the tension-resistant insulator 317 is released, and the tension is transferred to the tension support rod 311 side. While maintaining this state, the tension-resistant insulator 317 is replaced.

The dismantled tension-resistant insulator 317 is placed on the spreader 313 and is dismantled. Patent Document 1 describes such a method of replacing a tension-resistant insulator.

[Prior technical literature] [Patent Document]

[Patent Document 1] Japanese Patent Application Laid-Open No. 2016-149828

However, although the tension-resistant insulators 317 shown in FIG. 23 are composed of two connected into one body, in higher voltage equipment, the number of connected tensile-resistant insulators will increase. In addition, each tension-resistant insulator 317 is also enlarged. Therefore, when the structure shown in FIG. 23 is adopted, the spreader 313 will also be enlarged in conjunction with the tension-resistant insulator 317 to be removed.

That is to say, in the dismantling operation, in addition to the tension-resistant insulator 317, a hanger 313 corresponding to the size must be installed. Cranes are also inevitably required to have the ability to lift high-weight objects, and the enlargement of the equipment cannot be avoided.

Under such circumstances, it is difficult to introduce a large crane when working in a narrow tunnel or the like.

In addition, when a lifting device is installed on a column while avoiding the ground, it is necessary to control the lifting device used to support the tension-resistant insulating barrier to be replaced. Therefore, in a crowded environment, there are not only installation problems. , and it is difficult to work safely.

In addition, when a plurality of tension-resistant insulators are not installed at the same height, the ability to move in the height direction becomes more important. However, it is not easy to have a compact design that takes into account the size and weight of the restraining device, and to have sufficient mobility in the height direction.

Therefore, the object of the present invention is to provide a method for separating insulating rods that can safely separate a plurality of tension-resistant insulating rods installed at different heights without changing the position of the device used for the operation, and a method used in the method. Pole lifting devices, insulation barrier support tools, telegraph pole fixing tools, and hanging tools.

In order to achieve the above object, the insulating barrier separation method of the present invention uses a cable tensioning device and a pole lifting device to separate the tension-resistant insulating barrier from the overhead wire; it is characterized in that it includes: directing the tension toward The step of switching the branch circuit including the above-mentioned cable tensioning device formed in parallel with the above-mentioned insulating barrier; the step of using the insulating barrier support tool to support the above-mentioned insulating barrier from below; and the step of lifting the above-mentioned pole-mounted lifting device. The step of connecting the wires to the above-mentioned insulating barrier support tool; and the step of using the above-mentioned insulating barrier support tool to support the above-mentioned insulating barrier while releasing the connection of the above-mentioned insulating barrier that has been lifted by the above-mentioned pole lifting device.

Moreover, in addition to the above-mentioned structure, the insulation barrier separation method of the present invention is characterized in that the step of switching the tension toward the branch path includes: the step of grasping the above-mentioned overhead electric wire with one end of the above-mentioned cable tensioning device; The steps of hanging the hanging tool at the other end of the above-mentioned cable tensioning device on the above-mentioned overhead wire; the step of connecting the other end of the above-mentioned cable tensioning device to the above-mentioned hanging tool; the step of fixing the above-mentioned hanging tool on The step of fixing the utility pole with a tool that is fixed to the utility pole; and the step of shrinking the distance between one end and the other end of the above-mentioned cable tensioning device.

In addition, the pole-mounted lifting device of the present invention is used in the above-mentioned insulating barrier separation method; it is characterized in that it is provided with: an insulating barrier engaging portion that can engage with the insulating barrier; and an operating rod that allows the insulating barrier to be The above-mentioned insulating barrier engaging part is suspended from the front end and indirectly operates the hanging insulating barrier engaging part; and a direction conversion tool is used to install the above-mentioned operating rod on the metal cross arm of the utility pole in a direction-reversible manner.

Furthermore, in addition to the above-mentioned structure, the pole-mounted lifting device of the present invention is characterized in that the above-mentioned direction conversion tool is equipped with: a metal cross-arm mounting part with an insertion hole formed along the vertical direction so as to be mounted on the above-mentioned metal cross-arm; and a revolving portion having an insertion portion rotatably inserted into the insertion hole of the metal cross arm mounting portion, and an operating rod fixing portion for fixing the operating rod.

Moreover, in addition to the above-mentioned structure, the pole-mounted lifting device of the present invention is characterized in that the above-mentioned metal cross arm mounting part is provided with: an upper contact part that abuts above the above-mentioned metal cross arm; and a vertical installation part that is automatically The vicinity of the above-mentioned upper contact part is vertically installed toward the downward direction; the opposing part is extended from the above-mentioned vertically installed part to a position opposite to the above-mentioned upper contact part; and a spacing fixing tool is capable of fixing the above-mentioned upper contact part. It is spaced apart from the above-mentioned facing part; and a lifting part is provided on the above-mentioned facing part in a position that can be raised and lowered toward the above-mentioned upper contact part.

Furthermore, in addition to the above-described structure, the pole-mounted hoisting device of the present invention is characterized in that the metal cross arm formed by an angle steel with one surface facing vertically downward is formed on the side of the vertical installation part of the above-mentioned lifting part. The edge retaining portion is inserted into the lower edge.

In addition, the insulating barrier support tool of the present invention is based on the above-mentioned insulating barrier separation method and can be used in combination with a pole-mounted lifting device for hoisting the insulating barrier; it is characterized by having: a support rod at one end It has a holding portion; an insulating barrier engaging portion, which is provided at the other end of the above-mentioned support rod and can engage with the connecting portion of the above-mentioned insulating barrier; and a wire connecting portion, which is provided at the above-mentioned insulating barrier engaging portion. and the above-mentioned holding part, can be connected with the above-mentioned wire.

Moreover, in addition to the above-mentioned structure, the insulating barrier supporting tool of this invention is characterized in that the position of the said wire connection part can be changed between the said insulating barrier engaging part and the said holding part.

Furthermore, the utility pole fixing tool of the present invention is a cable tensioning device used in the above-mentioned insulating barrier separation method to fix the cable tensioning device for tensioning overhead electric wires to the utility pole; it is characterized by having: The bent portion has an inner diameter that is approximately the same as the outer diameter of the utility pole and is formed into an arc shape with an elastic material having a length exceeding half of the circumference of the utility pole; a rope-like body that extends from the bent portion One end is extended; and a hanging rope part is provided at the other end of the bending part to hang the rope-like body.

Moreover, in addition to the above-mentioned structure, the utility pole fixing tool of this invention is characterized in that the said rope-like body and the said hanging rope part are comprised from a single member along the said curved part.

Furthermore, the hanging tool of the present invention is used in the above-mentioned insulating barrier separation method so that one end of the cable tensioning device holding the erection wire can be suspended from the other end of the erection wire; it is characterized in that it is equipped with: insulation A rod having a connecting structure at both ends; at least one base part fixed to the above-mentioned insulating rod; and a suspension part having two engaging bodies so that the wire receiving sides of each other face each other along virtual planes separated in parallel. It is integrally configured in a direction, and is pivotably supported relative to the base so as to be rotatable around a space between the two engaging bodies.

As described above, according to the insulating barrier separation method of the present invention, since the insulating barrier is lifted via the insulating barrier supporting tool connected to the pole lifting device, it can be movable in the height direction with respect to the pole lifting device. area, lift the insulating barrier to a height plus the length from the lifting position of the insulating barrier support tool to the end. This allows even a small pole-mounted hoisting device to perform a wide range of operations beyond its own height. In addition, since the lifting operation is performed while being supported by the insulator support tool, even in a crowded working environment, it can be flexibly avoided without interfering with peripheral devices, and the work can be performed safely. In addition, when disconnecting, the load of the insulating barrier can be temporarily transferred to the side of the lifting device on the pole, so the burden of the operator operating the insulating barrier supporting tool can be reduced.

Furthermore, according to the insulating barrier separation method of the present invention, in addition to the above-mentioned effects, since the cable tensioning device and the tool for fixing the utility pole are connected via the hanging tool hung on the overhead wire, they can be separated separately. The operation of connecting the cable tensioning device and the tools for fixing the utility pole to the hanging tools. With this, the work on the pole can be carried out in a stable state. Furthermore, after the tension is switched toward the branch path, the overhead wire that has lost its tension can be hung conversely by using a hanging tool. Therefore, the overhead wire can be prevented from falling even without using a holding tool or the like to separate the insulating barrier from the overhead wire.

Furthermore, according to the pole-mounted hoisting device of the present invention, since the operating rod is mounted on the metal cross arm via the direction-changing tool, a wide range of operations using the direction-changing tool as a fulcrum can be flexibly performed.

Furthermore, according to the pole-mounted hoisting device of the present invention, in addition to the above effects, since the insertion hole and the insertion portion extending in the vertical direction are disposed so as to be relatively rotatable, movement in the horizontal direction is relatively stable.

Furthermore, according to the pole-mounted hoisting device of the present invention, in addition to the above-mentioned effects, three of the four directions around the metal cross-arm mounting portion of the metal cross-arm mounting portion are defined by the upper contact portion, the vertical installation portion, and the opposing portion. Surrounded, the upper abutting part and the opposing part are closed by the spacing fixing part in the remaining one direction. With this, if the spacing fixing tool is opened, the storage of the metal cross arm will become easier. In addition, when the lifting part is used to exert pressure on the metal cross arm to fix it, if the spacing fixing tool is closed, the upper contact part and the opposing part can be prevented from deforming, so that the pressing force can be effectively exerted. The upper contact portion and the like can be reduced in weight according to the degree of strength improvement that can be expected by spacing the fixing tools.

Furthermore, according to the pole-mounted hoisting device of the present invention, in addition to the above effects, the edge holding portion into which the lower end edge of the angle steel is inserted can stably hold one surface of the angle steel extending vertically downward toward the vertical installation portion side. This prevents the rotation of the lifting device on the pole with the metal cross arm as the center, thereby improving the load-bearing capacity of the work object.

Furthermore, according to the insulating barrier support tool of the present invention, since the support rod has a wire connecting portion between the holding portion and the insulating barrier engaging portion for connecting the wire of the lifting device on the column, most of the load can be lifted The insulator and the insulator support tool itself are stably supported while being temporarily transferred to the lifting device side on the pole.

Furthermore, according to the insulating barrier support tool of the present invention, in addition to the above effects, the position of the insulating barrier engaging part and the holding part can be changed by the wire connecting part, and the working height position can be selected depending on the situation. , and the center of gravity position can be adjusted to make the operation stable.

Furthermore, according to the utility pole fixing tool of the present invention, since the bent portion of the utility pole fixing tool is formed in an arc shape with a length exceeding half the circumference of the utility pole, it can be easily attached to the utility pole from the side. In addition, since the bent portion is formed of an elastic member having an inner diameter approximately the same as the outer diameter of the utility pole, it can be easily temporarily fixed by simply pushing into the utility pole with elastic deformation. In addition, in the temporarily fixed state, as long as the rope-like body extending from one end of the bending part is hung through the hanging rope part at the other end, it can be transformed into a state that can be formally fixed by fastening. That is, it can be fastened to the telephone pole by utilizing the tension force acting from the outside.

Furthermore, according to the utility pole fixing tool of the present invention, in addition to the above-mentioned effects, since the rope-like body and the hanging rope portion are formed as a single member along the curved portion, in addition to being able to evenly distribute the load of tension, it is also possible to It can be constructed simply by suppressing an increase in the number of parts.

Furthermore, according to the hanging tool of the present invention, the suspension portion is pivotably supported so as to be rotatable relative to the base portion fixed to the insulating rod. Furthermore, the suspension part is arranged so that the electric wire receiving sides of the two engaging bodies face each other, and the engaging bodies are spaced apart in parallel. Thereby, the overhead wire accommodated between the two engaging bodies of the suspension part can be engaged with the suspension part by rotating 180 degrees or less. In this way, since there is no need for delicate operations such as fastening operations, it is possible to improve the work efficiency through remote operations.

1‧‧‧Pole lifting device

2‧‧‧Operating stick

4‧‧‧Belt

6‧‧‧Belt connector

8‧‧‧Insulation barrier engaging part

10‧‧‧Rewinding device

12‧‧‧Handle

12a‧‧‧Eye bolt

30‧‧‧Direction Conversion Tool

32‧‧‧Clamping part (metal cross arm installation part)

34‧‧‧Horizontal side clamping part

34a‧‧‧Butt plate

34b‧‧‧Horizontal guide hole

36‧‧‧Latching claw

37‧‧‧Butterfly screw

38‧‧‧Guide pin

40‧‧‧Vertical side clamping part

42‧‧‧Guide plate

42a‧‧‧Vertical guide hole

44‧‧‧Lifting claw

46‧‧‧Screw

48‧‧‧Nut

50‧‧‧Roundabout

52‧‧‧Operation rod fixing part

54‧‧‧Pitch angle adjustment part

54a‧‧‧Jacking bolt

54b‧‧‧Connect long hole

54c‧‧‧Connection pin

60‧‧‧Direction Conversion Tool

62‧‧‧Clamping part (metal cross arm installation part)

64‧‧‧Upper contact part

64a‧‧‧Insertion hole

64b‧‧‧Sliding part

66‧‧‧Lower contact part

66a‧‧‧Angle steel holding part

66b‧‧‧Square pipe holding part

70‧‧‧Roundabout

72‧‧‧Operation rod fixing part

74‧‧‧Insertion part

90‧‧‧Direction Conversion Tool

92‧‧‧Clamping part (metal cross arm installation part)

94‧‧‧Upper contact part

94a‧‧‧Insertion hole

96‧‧‧Vertical setting part

98‧‧‧Opposing part

98a‧‧‧Guide wall

100‧‧‧Interval fixing tool

100a‧‧‧Eye bolt

102‧‧‧Lifting part

102a‧‧‧Eye bolt

102b‧‧‧Butt plate

102c‧‧‧End edge holding part

102d‧‧‧Screw head

104‧‧‧Roundabout

106‧‧‧Operation rod fixing part

108‧‧‧Insertion part

108a‧‧‧Latching groove

110‧‧‧Fixing pin

112‧‧‧Control piece

120‧‧‧Angle steel installation tools

122‧‧‧Insert board

124‧‧‧Spindle (insertion hole)

124a‧‧‧Location hole

126‧‧‧Upper side clamp

126a‧‧‧Fixing bolt

126b‧‧‧arm

126c‧‧‧Fixing pin

126d‧‧‧Engaging part

128‧‧‧Lower side clamp

128a‧‧‧Fixing bolt

128b‧‧‧arm

128c‧‧‧Fixing pin

128d‧‧‧Engaging part

150‧‧‧Insulator support tool

152‧‧‧Support Rod

152a‧‧‧Control Department

154‧‧‧Insulation barrier engaging part

154a‧‧‧hook

154b‧‧‧Suspension hole

156‧‧‧Occlusive part

156a‧‧‧Occlusion Rod

156c‧‧‧Engaging part

158‧‧‧Wire connection part

158b‧‧‧Suspension hole

160‧‧‧Water removal department

180‧‧‧Tools for fixing telephone poles

182‧‧‧Bending part

182a‧‧‧Guide piece

184‧‧‧Rope-like body

184a‧‧‧Hanging rope part

184b‧‧‧Extension part

186‧‧‧Fixed strap

188‧‧‧Control Department

188a‧‧‧Concave

190‧‧‧Ring processing department

210‧‧‧Hanging tools

212‧‧‧Extended setting rod

214‧‧‧Base

216‧‧‧Suspension Department

217, 218‧‧‧Clamping body

218a‧‧‧Rotation prevention part

220, 221‧‧‧Connection Department

222‧‧‧Engaging part

240‧‧‧Jumper Retention Tool

242‧‧‧Insulating rod

244‧‧‧Installation of metal parts

246‧‧‧Wire clamping tool

246a‧‧‧Clamping body

270‧‧‧Cable Tensioning Device

270a‧‧‧Thread catcher

270b‧‧‧tensioner

300‧‧‧Insulating Barrier (Tension Resistant Insulating Barrier)

301‧‧‧Wires (overhead wires)

301a‧‧‧Jumper

302‧‧‧Telegraph pole

303, 303a‧‧‧Metal cross arm

304‧‧‧Control tools

310‧‧‧Tension Relaxation Device

311‧‧‧Tension support rod

312‧‧‧Tension operating member

313‧‧‧Spreader

314‧‧‧Metal cross arm

315‧‧‧Introduction and retention fixture

316‧‧‧High voltage line

317‧‧‧Tension resistant insulator

X‧‧‧Axis

H‧‧‧Height difference

P1, P2‧‧‧Virtual plane

Figure 1: Overall three-dimensional view of the lifting device on the bollard.

Figure 2 is a direction conversion tool with pitch angle adjustment function. Figure 2(a) is a front view, Figure 2(b) is a rear view, Figure 2(c) is a top view, Figure 2(d) is a bottom view, Figure 2 (e) is the right side view, while Figure 2(f) is the left side view.

Figure 3 is a revolving part configured as a detachable direction changing tool that can change the pitch angle. Figure 3(a) is a front view, Figure 3(b) is a rear view, Figure 3(c) is a top view, Figure 3(d) ) is a bottom view, Figure 3(e) is a right side view, and Figure 3(f) is a left side view.

Figure 4 shows the direction conversion tool of Figure 3. Figure 4(a) is a left side view, and Figure 4(b) is a central longitudinal cross-sectional view taken along line A-A of Figure 4(a).

Figure 5 is a direction conversion tool in which the swivel part is detachable and the pitch angle is fixed. Figure 5(a) is a front view, Figure 5(b) is a rear view, Figure 5(c) is a top view, and Figure 5(d) It is a bottom view, Figure 5(e) is a right side view, and Figure 5(f) is a left side view.

Figure 6 shows the direction conversion tool of Figure 5. Figure 6(a) is a left side view, and Figure 6(b) is a central longitudinal cross-sectional view taken along line B-B shown in the left side view of Figure 6(a).

FIG. 7 is an overall perspective view of the direction conversion tool of FIG. 5 .

FIG. 8 is an overall perspective view showing the operation of the movable part of the direction changing tool of FIG. 5 .

Figure 9 is an exploded view of the direction conversion tool of Figure 5.

Figure 10 is an installation tool for angle steel. Figure 10(a) is a front view, Figure 10(b) is a rear view, Figure 10(c) is a top view, Figure 10(d) is a bottom view, and Figure 10(e) is Right side view, Figure 10(f) is a left side view, and Figure 10(g) is a perspective view.

Figure 11 is the installation tool for angle steel in Figure 10. Figure 11(a) is a left side view, and Figure 11(b) is a central longitudinal cross-sectional view taken along C-C of Figure 11(a). Figure 11(c) Figure 11(b) is a cross-sectional view taken along line D-D. Figure 11(d) is a cross-sectional view taken along line E-E of Figure 11(b). Figure 11(e) is a right side view. Figure 11(f) is a diagram illustrating the operation when viewed from above.

Figure 12 is a perspective view of the insulator support tool.

FIG. 13 is an enlarged view of an insulating barrier engaging portion installed on the insulating barrier supporting tool of FIG. 12 .

Figure 14 is an enlarged view of the wire connecting portion and its surroundings of the insulation barrier support tool of Figure 12;

FIG. 15 is a diagram showing the use state of the insulation barrier support tool of FIG. 12 .

Figure 16 is a perspective view of a utility pole fixing tool.

FIG. 17 is a diagram showing the use state of the utility pole fixing tool of FIG. 16 .

Figure 18 is a perspective view of the hanging tool.

Fig. 19 shows the suspension part and its surroundings of the hanging tool of Fig. 18. Fig. 19(a) is a view showing the open state of the suspension part, and Fig. 19(b) is a view showing the engaged state of the suspension part.

Fig. 20 is a diagram showing the state of use of the utility pole fixing tool and the hanging tool.

Figure 21 is a jumper holding tool. Figure 21(a) is a front view, Figure 21(b) is a rear view, Figure 21(c) is a top view, Figure 21(d) is a bottom view, and Figure 21(e) is the right side. View, Figure 21(f) is the left side view, and Figure 21(g) is the perspective view.

Fig. 22 shows the jumper holding tool of Fig. 21. Fig. 22(a) is a top view, and Fig. 22(b) is a longitudinal sectional view taken along line F-F of Fig. 22(a).

Figure 23 is a diagram showing a conventional method of replacing a tension-resistant insulator.

Hereinafter, the direction changing tool according to the embodiment of the present invention, the pole lifting device using the same, the insulating barrier supporting tool, the utility pole fixing tool, and the hanging tool will be described using drawings.

<Pole lifting device>

Figure 1 shows an overall perspective view of the pole-mounted lifting device 1. The pole-mounted hoisting device 1 is provided with: an insulating barrier engaging portion 8 for hooking a tension-resistant insulating barrier 300 (described later with reference to FIG. 15 ) to be worked; and an operating rod 2 for operating the insulating barrier to engage. Part 8; and a direction conversion tool 30, which rotatably fixes the pole lifting device 1 itself to the metal cross arm 303 of the utility pole. The operating rod 2 is hollow-molded from FRP (Fiber Reinforced Plastics) material, and its middle position is grasped by a direction conversion tool 30 described in detail later. Although the metal cross arm 303 is made of angle steel, square pipe, etc., the metal cross arm 303 made of angle steel is used as an example for description here. Such pole-mounted lifting device 1 can not only be used for the tension-resistant insulating barrier 300 to be replaced during the replacement project of the tension-resistant insulating barrier 300, but can also be used to hang other tools and equipment.

The insulation barrier engaging portion 8 is suspended by the belt 4 . The belt 4 extends to the inside of the operating rod 2 and is taken up by the take-up device 10 located in the middle position. The winding device 10 is equipped with a ratchet handle 12 having an eyebolt 12a for locking at the front end. By hooking the eyebolt 12a using a remote operation and moving it up and down, the belt 4 can be wound up or sent out.

<Orientation Conversion Tool 1>

Next, the direction changing tool 30 described in the description of FIG. 1 will be described.

Figure 2 shows a direction conversion tool 30 with a pitch angle adjustment mechanism. Figure 2(a) represents a front view, Figure 2(b) represents a rear view, Figure 2(c) represents a top view, Figure 2(d) represents a bottom view, Figure 2(e) represents a right side view, and Figure 2(f) Indicates left side view. The direction changing tool 30 is composed of a clamping part 32 (metal cross arm mounting part) attached to the metal cross arm 303, and a swing part 50 that can rotate horizontally relative to the clamping part 32.

First, the clamping portion 32 will be described.

The clamping portion 32 of the direction changing tool 30 is configured as a metal cross arm 303 that can be mounted on an angle steel material (see FIG. 1 ). The clamping part 32 is composed of a horizontal clamping part 34 that fixes the angle steel material in the horizontal direction, and a vertical side clamping part 40 that fixes the angle steel material in the vertical direction.

The horizontal side clamping part 34 of the clamping part 32 has a substantially flat contact plate 34a that is in contact with the upper surface of the metal cross arm 303 (see FIGS. 2(a) and (c)). A horizontal guide hole 34b is formed in the contact plate 34a by three parallel elongated holes (see Fig. 2(c)). On the lower surface side of the abutting plate 34a, a locking claw 36 for locking the horizontal end edge of the metal cross arm 303 is provided (see Fig. 2(a)). The locking claw 36 is fixed by a butterfly screw 37 penetrating the central horizontal guide hole 34b among the three. The horizontal guide holes 34b on both sides are arranged so that the guide pins 38 (see FIG. 2(c) ) for moving the locking claw 36 in parallel with the metal cross arm 303 are inserted. Thereby, the horizontal side clamping portion 34 can be aligned according to the width of the metal cross arm 303 in the horizontal direction.

The vertical side clamping portion 40 of the clamping portion 32 has a lifting claw portion 44 that is locked from below to the metal cross arm 303 to be clamped (see FIG. 2(a) ). The lifting claw portion 44 is configured to be raised and lowered along vertical guide holes 42a formed on both sides of the guide plates 42 arranged in the vertical direction. The screw 46 is disposed penetrating through the center of the lifting claw portion 44 (see FIG. 2(e) ). The lifting claw portion 44 is placed on the nut 48 attached to the lower end of the screw rod 46 . Therefore, the lifting claw portion 44 can be raised and lowered by screwing the nut 48 forward and backward relative to the screw rod 46 .

Furthermore, in this embodiment, although the guide plate 42 is shown as an example in which two pieces are provided on both sides of the lifting claw portion 44, the guide plate 42 is configured to prevent the lifting claw portion 44 from rotating together. , as long as it is set to any one.

With the clamping part 32 as above, when the direction conversion tool 30 is installed on the metal cross arm 303, the position of the locking claw 36 of the horizontal side clamping part 34 is aligned with the horizontal direction of the metal cross arm 303 in advance. In the width state, the contact plate 34a is placed on the upper surface of the metal cross arm 303 (temporarily fixed state). In this state, if the vertical side clamping portion 40 provided in the vertical direction is locked, the installation of the metal cross arm 303 is completed (formally fixed state).

Next, the turning portion will be described.

The rotating part 50 is provided above the above-mentioned clamping part 32 and has a rotating mechanism for converting the direction of the operating rod 2 (see FIG. 1 ) in the horizontal plane and a pitch angle adjusting mechanism for adjusting the angle in the vertical direction. A disc-shaped member parallel to the abutting plate 34 a of the horizontal clamping portion 34 is formed below the revolving portion 50 . The rotating portion 50 can rotate horizontally with the center of the disc-shaped portion as a rotation axis. Above the revolving part 50, there is provided an operating rod fixing part 52 for grasping and fixing the operating rod 2. The operating rod fixing portion 52 is formed with a space that can accommodate and hold the operating rod 2 .

In addition, the revolving portion 50 is provided with a pitch angle adjusting portion 54 together with the operating rod fixing portion 52 in order to adjust the pitch angle of the gripped and fixed operating rod 2 . On the right side of Fig. 2(a), a jacking bolt 54a is disposed in a position where the above-mentioned operating rod fixing portion 52 can be jacked up from below. The upper end of the jacking bolt 54a is passed through by the connecting pin 54c and is rotatably connected to the connecting elongated hole 54b (shown by a dotted line) formed below the operating rod fixing part 52. Since it is configured in this way, as the jacking bolt 54a moves up and down, the connecting pin 54c slides in the connecting elongated hole 54b, and the pitch angle of the operating rod fixing part 52 can be adjusted smoothly. In addition, since the lower end of the jacking bolt 54a is formed in a hexagonal shape, the pitch angle can be easily adjusted by operating the rotation tool from the lower end.

<Orientation Conversion Tool 2>

FIG. 3 shows a direction changing tool 60 that can be replaced with the direction changing tool 30 of FIG. 2 and has a swing portion that is detachable and can change the pitch angle. Figure 3(a) represents a front view, Figure 3(b) represents a rear view, Figure 3(c) represents a top view, Figure 3(d) represents a bottom view, Figure 3(e) represents a right side view, and Figure 3(f) Indicates left side view. The portion consisting of the clamping portion 62 mounted on the metal cross arm 303 and the rotating portion 70 that can rotate horizontally relative to the clamping portion 62 is the same as the direction changing tool 30 in FIG. 2 . 4(a) is a left side view of the direction changing tool 60, and FIG. 4(b) is a central longitudinal cross-sectional view taken along line A-A shown in the left side view of FIG. 4(a). The direction conversion tool 60 will be described using FIGS. 3 and 4 .

First, the clamping portion 62 will be described.

The clamping portion 62 of the direction conversion tool 60 is configured to be installed diagonally on a metal cross-arm 303 (refer to FIG. 1 ) made of angular steel or square pipe. The clamping part 62 is different from the direction conversion tool 30 in FIG. 2 in that it can be fixed to the metal cross arm 303 using only a clamping mechanism in the vertical direction. The clamping portion 62 includes an upper contact portion 64 that contacts the upper side of the metal cross arm 303, a lower contact portion 66 that contacts the lower portion of the metal cross arm 303, and guides the lower contact portion 66 along the vertical direction. The sliding part 64b is introduced. The sliding portion 64b is suspended from the upper contact portion 64 along one side of the metal cross arm 303 . Furthermore, the upper contact portion 64 is provided with a cylindrical member having an insertion hole 64a formed vertically downward.

On the upper side of the lower contact portion 66 of the clamping portion 62, there are formed an angle steel material holding portion 66a for holding the lower end of the metal cross arm 303 of the angle steel material, and a square pipe material holding portion 66b for holding the lower end of the square pipe material (refer to Figure 3 ( a)). In FIG. 4( b ), the angle steel material and the square pipe material in a state held by any one of the angle steel material holding parts 66 a and the square pipe material holding parts 66 b are respectively represented by dotted lines.

The clamping portion 62 as described above can cope with two types of metal cross arms 303 of angle steel and square pipes, and can be fixed only by clamping in the vertical direction, so the work efficiency is improved.

On the other hand, the revolving portion 70 that is detachable from the clamping portion 62 has an insertion portion 74 that is rotatably inserted into the above-mentioned insertion hole 64 a. Furthermore, the operation rod fixing part 72 for fixing the operation rod 2 (refer to FIG. 1) of the pole-mounted hoisting device 1 is provided. Since the operating rod fixing portion 72 is bendable relative to the insertion portion 74, the pitch angle of the operating rod 2 can be changed.

<Direction Conversion Tool 3>

FIG. 5 shows a direction changing tool 90 that can be replaced with the direction changing tool 30 of FIG. 2 or the direction changing tool 60 of FIG. 3 . In the direction changing tool 90, the turning part 104 is configured to be detachable, and the pitch angle is fixed. Figure 5(a) represents a front view, Figure 5(b) represents a rear view, Figure 5(c) represents a top view, Figure 5(d) represents a bottom view, Figure 5(e) represents a right side view, and Figure 5(f) Indicates left side view. In addition, Fig. 6(a) is a left side view of the direction changing tool 90, and Fig. 6(b) is a central longitudinal sectional view taken along line B-B shown in the left side view of Fig. 6(a). FIG. 7 is an overall perspective view of the direction conversion tool 90 . FIG. 8 is an overall perspective view showing the operation of the movable part of the direction changing tool 90. In addition, FIG. 9 shows an exploded view of the direction changing tool 90. This is illustrated using Figures 5 to 9.

First, the clamping portion 92 will be described.

The clamping portion 92 of the direction changing tool 90 is configured as a metal cross arm 303 (see FIG. 1 ) that can be mounted on an angle steel material or a square pipe material, similarly to the direction changing tool 60 in FIG. 3 . The clamping part 92 (metal cross arm mounting part) is also similar to the direction changing tool 60 in FIG. 3 and can fix the metal cross arm 303 only by clamping in the vertical direction. As shown in FIG. 5(a) , the clamping portion 92 is formed in a rectangular frame shape with its side (left side of the paper) opened. Among the frame-shaped members, the portion in contact with the upper surface of the metal cross arm 303 is defined as the upper contact portion 94 . Furthermore, a portion vertically installed downward from the side of the upper contact portion 94 is defined as a vertically installed portion 96 . In addition, a portion extending in the horizontal direction from the vertical installation portion 96 and facing the upper contact portion 94 is defined as an opposing portion 98 .

The spacing fixing tool 100 connects the upper abutting portion 94 and the opposing portion 98 in a manner to block the space for accommodating the metal cross arm 303 . The spacing fixing tool 100 is configured so that one end thereof can be screwed into the upper contact portion 94 . Thereby, the receiving area of the metal cross arm 303 can be opened and closed by operating the eye bolt 100a provided at the other end. Independent of the spacing fixing tool 100 , a lifting portion 102 that can move forward and backward toward the upper contact portion 94 is screwed to the opposing portion 98 and arranged.

In order to describe the structure of the lifting part 102 in detail, refer to FIG. 6 . As shown in FIG. 6( b ), the lifting portion 102 is composed of an eye bolt 102 a and an abutment plate 102 b rotatably connected to the upper end of the eye bolt 102 a. The opposing portion 98 has a guide wall 98a for preventing the abutting plate 102b from rotating together when the eyebolt 102a of the lifting portion 102 is rotated. The raising and lowering operation of the raising and lowering portion 102 is performed within a range in which the engagement with the guide wall 98a is not disengaged (see FIG. 7 ).

In Figure 6(b), the clamped and fixed metal cross arm 303 (angle steel material) is represented by a dotted line. As shown in FIG. 6(b) , the abutting plate 102b of the lifting part 102 is formed with edge holding parts 102c on both sides that can accommodate the lower edge of the metal cross arm 303. Thereby, the metal cross arm 303 in the clamped state is stable. In the structure of this embodiment, although the edge holding part 102c is formed on both sides of the contact lever 102b, it suffices as long as it is provided at least on the vertical installation part side. By being located on both sides, it can be installed from any direction relative to the metal cross arm 303.

In addition, the lifting part 102 is effective not only for the metal cross arms 303 of angle steel materials, but also for the metal cross arms 303 of square pipe materials. In the example shown in FIG. 6(b) , although the screw head 102d protrudes from the abutting plate 102b, if the screw head 102d is aligned with the mounting hole of a pin insulator or the like formed in the square pipe, it will , it can prevent offset and stabilize the setting. Furthermore, if the screw head 102d is embedded in the contact plate 102b, the pole-mounted hoisting device 1 can be fixed at a position where no mounting hole is formed.

In the clamping part 92 configured in this way, after the metal cross arm 303 of angle steel or square pipe is received in the clamping part 92, the opening on the side is closed by the spacing fixing tool 100, and the upper abutting part 94 and the opposite The distance between the facing portions 98 is fixed (see FIGS. 7 and 8 ). In this fixed state, the lifting part 102 is raised from below to clamp the metal cross arm 303, so that the pole-mounted hoisting device 1 is fixed to the metal cross arm 303. Here, the spacing fixing tool 100 prevents the upper contact portion 94 and the opposing portion 98 from opening due to deformation, thereby preventing the loss of the pressing force obtained by the lifting portion 102 . That is, by providing the spacing fixing tool 100 responsible for the tensile strength, the standard required for the bending strength of the upper contact portion 94 can be lowered. Thereby, the thickness of the upper contact portion 94 and the like can be suppressed without reducing the strength, thereby achieving weight reduction.

Next, the revolving portion 104 will be described.

As shown in FIG. 8 , the operating rod fixing portion 106 of the revolving portion 104 is configured to open the space accommodating the operating rod 2 (see FIG. 1 ) through a hinge mechanism. Therefore, it is the same as the direction changing tool 30 in FIG. 2 , the position of the operating rod 2 in the longitudinal direction can be easily changed even when operating remotely. Furthermore, as shown in FIG. 9 , the turning portion 104 is configured to be detachable from the clamping portion 92 . The insertion portion 108 of the pivot portion 104 is inserted and arranged so as to be horizontally pivotable with respect to the insertion hole 94 a formed in the upper contact portion 94 of the clamping portion 92 . With such a detachable structure, the work when fixing to the metal cross arm 303 can be performed using only the clamping portion 92, thereby reducing the work load and improving safety.

Referring to FIG. 9 , it can be seen that the insertion portion 108 on the side of the revolving portion 104 is formed with an engaging groove 108 a extending in the center toward the circumferential direction. By engaging the fixing pin 110 of the locking mechanism provided in the clamping portion 92 with the engaging groove 108a, separation under unexpected conditions can be prevented, thereby improving safety.

Regarding this locking mechanism, refer to Fig. 6(b). The fixing pin 110 is disposed at an intermediate position of the insertion hole 94 a of the upper contact portion 94 so as to be movable forward and backward in a direction orthogonal to the insertion portion 108 . The fixing pin 110 is biased toward the insertion portion side by a spring member. In the state shown in FIG. 6( b ), the insertion portion 108 is locked by the front end of the fixing pin 110 being embedded in the engaging groove 108 a. Furthermore, a holding piece 112 operated by a lever mechanism is connected to the fixing pin 110 . Thereby, pliers etc. for distal operation can be used to unlock. Since the engaging groove 108a is formed throughout the entire circumference of the insertion portion 108, it does not hinder the rotational movement of the swing portion 104 even in the locked state.

<Installation tools for angle steel>

Secondly, the metal cross arm installation tools for angle steel are explained. FIG. 10 shows an installation tool 120 for angle steel. Figure 10(a) is a front view, Figure 10(b) is a rear view, Figure 10(c) is a top view, Figure 10(d) is a bottom view, Figure 10(e) is a right side view, Figure 10(f) is The left side view, while Figure 10(g) is the perspective view.

There is known a metal cross arm 303a composed of a combination of two angle steel materials. The metal cross arm 303a is formed by placing the horizontal parts of two angle steels back to back and aligning the vertical parts within the same side. In addition, a small gap is formed between the two angle steel materials. Such a metal cross arm 303a is represented by a dotted line in Fig. 10(a).

The angle steel installation tool 120 is provided with an insertion plate 122 inserted into a gap between two angle steel materials. Support shafts 124 are provided on both sides in the vertical direction relative to the insertion plate 122 . An upper clamp 126 and a lower clamp 128 are rotatably provided around the two spindles 124 . Since the upper clamp 126 and the lower clamp 128 are configured to be mirror-symmetrical with the insertion plate 122 as the center, the upper clamp 126 will be described. The upper clamp 126 is provided with an arm 126b rotatably installed around the support shaft 124, a fixing pin 126c that fixes the rotational position of the arm 126b, and an angle steel screwed in such a way that it can move forward and backward with respect to the insertion plate 122 for fixation. Fixing bolt 126a. Since the fixing bolt 126a is provided with an annular engaging portion 126d on the side opposite to the insertion plate 122, the tightening operation can be performed by remote operation.

Here, in order to explain the fixing pins 126c and 128c, a cross-sectional view of the angle steel mounting tool 120 is shown. Figure 11(a) shows a left side view of the angle steel installation tool, Figure 11(b) shows a central longitudinal cross-sectional view taken along line C-C in Figure 11(a), and Figure 11(c) shows a view taken along the line C-C in Figure 11(b) ), Figure 11(d) shows a cross-sectional view taken along line E-E of Figure 11(b), and Figure 11(e) shows a right side view. In addition, FIG. 11(f) is a diagram showing the operation in a plan view.

As shown in Figures 11(b), (c) and (d), it can be seen that positioning holes 124a are formed on the support shaft 124 at every 90-degree angle in the circumferential direction. Furthermore, as shown in FIG. 11(b) , it can be seen that the arms 126b and 128b can be positioned by fitting the front ends of the fixing pins 126c and 128c into any one of the positioning holes 124a. The fixing pins 126c and 128c are not limited to those configured to be helically provided with respect to the arms 126b and 128b. They may be fixed to the arms 126b and 128b in such a manner that the side of the spindle 124 is energized. With this structure, the arms 126b and 128b can be arranged in four directions as shown in Fig. 11(f).

The support shaft 124 of the angle steel installation tool 120 as described above is formed of a tubular material penetrating in the vertical direction as shown in FIG. 11(a) . This support shaft 124 is equivalent to the insertion hole 64a provided in the clamping part 62 of the direction changing tool 60 shown in FIG. 3 . Therefore, by inserting the insertion portion 74 of the turning portion 70 of the direction changing tool 60 of FIG. 3 into the spindle 124, it can be used as a direction changing tool. Similarly, the turning portion 104 of the direction changing tool 90 in FIG. 5 can also be combined.

<Insulation barrier support tool>

Figure 12 is a perspective view of the insulation barrier support tool 150 of the present invention.

The insulation barrier support tool 150 has a support rod 152 . The support rod 152 has a holding portion 152a at one end, and an insulating barrier engaging portion 154 at the other end. The insulating barrier engaging portion 154 will be described in detail later using FIG. 13 .

A wire connection part 158 capable of connecting the belt 4 (wire) of the pole-mounted hoisting device 1 (see FIG. 1 ) is provided between the holding part 152a and the insulating barrier engaging part 154. This wire connection part 158 will be described later using FIG. 14 . Above and below the wire connecting portion 158, a water removal portion 160 for breaking the flow of raindrops is provided.

FIG. 13 is an enlarged view of the insulation barrier engaging portion 154 installed on the insulation barrier support tool 150 of FIG. 12 . The insulation barrier engaging portion 154 has a U-shaped hook portion 154a and a closing portion 156 that closes the opening of the hook portion 154a. In the hook-shaped portion 154a, a suspension hole is formed in one of the U-shaped end portions. In addition, the hook-shaped portion 154a is formed to be inclined so that the end on the side of the suspension hole 154b is slightly raised.

The blocking portion 156 is disposed through the side where the suspension hole 154b is not formed. The occlusion part 156 has an occlusion rod 156a configured to be able to appear and retract inside the hook-shaped part 154a, and an annular engaging part 156c that can be operated distally. Here, the open state of the hook-shaped portion 154a is represented by a solid line, and the closed state is represented by a dotted line. The hook-shaped portion 154a is slightly inclined, so when the insulating barrier is lifted, the center of gravity moves less and is less likely to shake. A circular area represented by a two-point chain line within the area surrounded by the hook portion 154a and the blocking portion 156 (represented by a dotted line) schematically represents the connection location of the insulating barriers of the work object.

FIG. 14 is an enlarged view of the wire connecting portion 158 and its surroundings of the insulation barrier support tool 150 of FIG. 12 . The wire connecting portion 158 is formed into a U-shape that can receive the middle portion of the support rod 152 from the side. The wire connecting portion 158 is also formed with a suspension hole 158b. Not only the insulation barrier engaging portion 154, but also the belt 4 of the pole lifting device 1 can be connected to the wire connecting portion 158 (see Fig. 1). If the fastening portion provided to close the U-shaped opening is locked, the wire connecting portion 158 can be fixed at any height position. Therefore, the lifting position can be easily changed according to the work content.

Here, although the water removal part 160 is provided above and below the wire connection part 158 to break the flow of raindrops, if the water removal part 160 is provided at least below the wire connection part 158, not only the insulation barrier engaging part 154, it is also possible to break the flow of raindrops flowing from the belt 4 of the pole lifting device 1 to the wire connecting part 158.

FIG. 15 is a diagram showing the use state of the insulation barrier support tool 150 of FIG. 12 .

FIG. 15 shows a state in which the insulation barrier support tool 150 is connected to the pole lifting device 1 . The wires in Figure 15 only show three neutral wires powered by three-phase AC, and the remaining two outer wires connected to the metal cross arm 303 are omitted for convenience of explanation.

As shown here, when the center line is arranged at a higher position than the metal cross arm 303, that is, when it is arranged at a different height from the outer line, the operating range in the height direction will be expanded. Therefore, while a sufficient movable area can be ensured in the vertical direction for the work objects near the metal cross arm 303, the work objects above the metal cross arm 303 cannot be fully obtained by the pole lifting device 1 alone. The movable area on the upper side. In order to compensate for the movable area on the upper side, an insulator support tool 150 is used.

In order to connect the belt 4 of the pole lifting device 1 to other tools, the belt connecting device 6 provided at the lower end of the belt 4 is engaged with the wire connecting portion 158 of the insulation barrier support tool 150 . Thereby, if the belt connecting device 6 reaches the upper limit of the pole lifting device 1, only the height difference H portion from the wire connecting portion 158 of the insulating barrier support tool 150 to the insulating barrier engaging portion 154 can exceed the upper limit and be lifted. rise.

<Tools for fixing telephone poles>

Figure 16 is a perspective view of the utility pole fixing tool 180 of the present invention.

When replacing the insulating barrier, in order to relax or eliminate the tension applied to the insulating barrier, a branch path must be formed in parallel with the insulating barrier (described later using FIG. 20 ), and the tension must be switched to the branch path side. As a construction frame for forming such a branch path between the electric wire and the electric pole, the electric pole fixing tool 180 is used.

The utility pole fixing tool 180 has an elastically deformable bending portion 182 . The bent portion 182 is formed so that its inner diameter is approximately the same as the outer diameter of the utility pole. Furthermore, it is formed into an arc shape with a length exceeding half of the circumference of the telephone pole. Since it is configured in this way, it can be easily installed on the side of the telephone pole with elastic deformation by pressing in relatively lightly.

Guide pieces 182a are formed on both sides of the bent portion 182 to open toward the outside. Therefore, when the utility pole is pressed in from the side, since the utility pole is guided toward the center of the bending portion 182, installation is easy even if the remote end is operated. The rope-like body 184 is arranged along the inside of the curved portion 182 . The rope-like body 184 is fixed to the curved portion 182 through four fixing straps 186 . Furthermore, the rope-like body 184 is formed with annular processing portions 190 at both ends. One end is disposed close to one end of the bending portion 182 , and the other end is disposed far away from the bending portion 182 . The annular processing portion 190 of the cord-like body 184 provided at a position close to the bending portion 182 is a hanging cord portion 184a through which the longer extension portion 184b extended at the other end is hung. The usage state of the rope hanging portion 184a will be described using FIG. 17 below.

A gripping portion 188 is provided on the guide piece 182a of the curved portion 182 on the side where the rope hanging portion 184a is formed. The holding portion 188 is formed with a recessed portion 188 a that is easy to hold with pliers or the like used as a distal operation tip tool.

FIG. 17 is a diagram showing a state in which the utility pole fixing tool 180 of FIG. 16 is used. For convenience of explanation, only part of the holding tool 304 such as the utility pole to be fixed and the pliers for remote operation are shown with dotted lines. In FIG. 17 , a state in which the utility pole fixing tool 180 is attached to the utility pole is shown.

By hanging the extended portion 184b at the other end of the rope-like body 184 on the hanging rope portion 184a at one end and applying tension, the rope-like body 184 is locked and fixed to the telephone pole. The angle of the gripping portion 188 can be changed with the direction of the axis X represented by the single-point chain line as the center. Thereby, the holding angle of the bending portion 182 can be adjusted according to the working environment. The holding part 188 whose angle is adjusted in this way can be held by a holding tool 304 or the like, and installed by hooking the bent part 182 from the side of the utility pole.

Here, if the inner diameter of the utility pole fixing tool 180 including the rope-like body 184 arranged along the curved portion 182 is first formed to be slightly smaller than the outer diameter of the utility pole, even if the rope-like body 184 is not locked, Stability can be achieved by only utilizing the elastic restoring force of the curved portion 182 . In addition, if the fixing belt 186 that fixes the rope-like body 184 to the curved portion 182 uses a member with a large friction coefficient, the stability can be further improved.

<Hanging Tool (Expansion Tool)>

Figure 18 shows a perspective view of the hanging tool 210 of the present invention.

The hanging tool 210 includes one extended rod 212 and two suspension parts 216 . The two suspension parts 216 each have two engaging bodies 217 and 218. The two engagement bodies 217 and 218 are respectively arranged along virtual planes P1 and P2 separated in parallel. The virtual planes P1 and P2 are represented by two-point chain lines. Furthermore, the two engaging bodies 217 and 218 are integrally formed so that the wire receiving sides of the two engaging bodies 217 and 218 are opposed to each other. In this way, the hanging tool 210 is configured to accommodate the electric wire between the two engaging bodies 217 and 218 that are separated in parallel from above. The suspension part 216 is rotatably supported on the base part 214 fixed to the extended rod 212 with a center between the two engaging bodies 217 and 218 .

Here, the operation of the suspension part 216 will be described using FIG. 19 . FIG. 19 is a perspective view showing the operation of the suspension part 216. Fig. 19(a) shows a state in which the virtual plane including the engagement body and the extending rod 212 are arranged in parallel, and Fig. 19(b) shows a state in which the virtual planes P1 and P2 are arranged at right angles to the extending rod 212. . Virtual planes P1 and P2 are represented by two-point chain lines as in FIG. 18 . A distally operable annular engaging portion 222 is provided at the lower end of the rotation axis of the suspension portion 216 . In this way, by rotating the engaging portion 222 using a distal operating rod or the like, the orientation of the suspension portion 216 can be changed.

Returning to Fig. 18, Fig. 18 shows the state of Fig. 19(b). Furthermore, in FIG. 18 , for the convenience of explanation, the position of the accommodated electric wire 301 is schematically represented by a single-point chain line. The hanging tool 210 of this embodiment accommodates the electric wire between the two engaging bodies 217 and 218 from above in the state shown in FIG. 19(a) . Then, after accommodating the electric wire, the suspension part 216 is rotated 90 degrees to the state shown in FIG. 19(b) , and the suspension part 216 is engaged with the electric wire.

However, in this embodiment, the two engagement bodies 217 and 218 that constitute one suspension part 216 are not exactly the same shape. The front end of one is formed to protrude downward, and a rotation preventing portion 218a is formed by bending toward the outside. Accordingly, if the hanging tool 210 is hung on the wire as shown in FIG. 18 , the engaging part 222 is simply grasped and the suspension part 216 is rotated, so that the rotation preventing part 218 a is hooked on the wire. It is impossible to return to the state of Figure 19(a). In this way, the hanging tool 210 can be prevented from falling from the wire due to incorrect operation through the locking function of the rotation preventing portion 218a. Furthermore, protrusions for preventing the rotation preventing portion 218a from falling off may also be provided on both sides of the engaging bodies 217 and 218.

The extension bar 212 may be selected to have a length corresponding to the branch path containing the cable tensioning device 270. One end of the extended rod 212 is provided with a connecting portion 220 to which a cable tensioning device 270 including a cable catcher 270a is connected in series. Furthermore, the other end of the extended rod 212 is provided with a connecting portion 221 connected to the rope-shaped body 184 (see FIG. 16 ) of the utility pole fixing tool 180 . The structure of this embodiment is provided with the hook-shaped connection part 221 which can hook the annular processing part 190 of the above-mentioned rope-like body 184 (refer FIG. 19).

FIG. 20 is a diagram showing the state in which the utility pole fixing tool 180 and the hanging tool 210 are used.

Here, the cable tensioning device 270, the hanging tool 210, and the utility pole fixing tool 180 are also arranged in series and arranged in parallel near the insulating barrier to form a branch path. Branch roads are schematically represented by single-point link lines to represent their paths. As in the case of FIG. 15 , illustration of unexplained peripheral structures other than the three outer wires powered by three-phase alternating current is omitted.

FIG. 20 shows a state in which a hanging tool 210 is installed on the wire suspension near the insulation barrier, and the utility pole fixing tool 180 is temporarily fixed to the utility pole. As mentioned above, the cable tensioning device 270 is connected to the connecting portion 220 of one end of the extended rod 212 of the suspended hanging tool 210, and the utility pole fixing tool 180 is connected to the connecting portion 221 of the other end.

<Jumper retention tool>

Next, the jumper holding tool 240 used to hold the jumper 301a (refer to FIG. 20) during the insulation barrier replacement operation will be described. Figure 21 is a six-side view and a perspective view of the jumper holding tool 240. Figure 21(a) shows a front view, Figure 21(b) shows a rear view, Figure 21(c) shows a top view, Figure 21(d) shows a bottom view, Figure 21(e) shows a right side view, Figure 21(f) shows The left side view, while Figure 21(g) shows the perspective view. The jumper holding tool 240 is provided with a mounting metal member 244 on one end side of the insulating rod 242, and is provided with a wire locking tool 246 on the other end side.

The mounting metal piece 244 is formed by clamping the horizontal part of the metal cross arm 303 of the angle steel material. If the metal cross arm 303 is a square pipe, the mounting metal piece 244 can be replaced with a clamp that can hold the square pipe. Here, the structure of the mounting metal fitting 244 is demonstrated using a cross-sectional view. FIG. 22(a) is a top view of the jumper holding tool 240, and FIG. 22(b) is a longitudinal sectional view taken along line F-F in FIG. 22(a). In Figure 22(b), the cross section of the metal cross arm 303 of the installed angle steel is shown with a dotted line. The mounting hardware 244 is installed by bolt fastening in the form of clamping the horizontal portion of the angle steel.

Returning to FIG. 21 , the wire locking tool 246 has a shape similar to the suspension portion 216 of the hanging tool 210 . That is, the two curved engaging bodies 246 a are integrally formed and arranged so that their wire receiving sides face each other along two virtual planes separated in parallel. The structure of the wire locking tool 246 of the jumper holding tool 240 is similar to that of the suspension part 216 of the hanging tool 210 , but is different in that the part is not rotatable but is fixed in a virtual plane parallel to the insulating rod 242 . In addition, the rotation preventing portion 218a like the hanging tool 210 is not formed in any of the engaging bodies 246a constituting the electric wire locking tool 246. By fixing the jumper holding tool 240 configured in this way to the metal cross arm 303, the jumper in the insulation barrier replacement operation can be hooked to the wire locking tool 246, so that the operation can be performed safely. In addition, the wire locking tool 246 does not use a clamping mechanism, but simply inserts a jumper between the two engaging bodies 246a and rotates the direction of the inserted jumper 90 degrees to achieve the locking state. Therefore, the work efficiency can be improved.

<Construction method>

From this point on, in the insulating barrier replacement work, we will explain the insulating barrier separation method up to the removal of the damaged insulating barrier, listing items for each step.

(1) Steps to switch the tension toward the branch road side including the cable tensioning device

This step is performed by forming a branch path including a cable tensioning device between the electric wire and the utility pole in parallel with the insulating barrier to be worked, and shrinking the side of the formed branch path by the cable tensioning device. Tension is a step whereby the tension on the path on the side of the insulation barrier is relaxed or eliminated. Specifically, this step includes the following steps (a) to (e).

(a) Steps to make one end of the cable tensioner grip the wire

In this step, as shown in FIG. 20 , the insulating barrier 300 of the work object that needs to be replaced is crossed and installed on the path connecting the utility pole 302 and the wire 301 (the path represented by the single-point chain line). Cable tensioner 270. As mentioned above, the cable tensioning device 270 includes a cable gripper 270a and a tensioner 270b. One end of the cable tensioning device 270 uses the wire grab 270a to grasp the wire 301 and thereby be fixed.

(b) Steps to hang the hanging tool at the other end of the hanging cable tensioning device on the wire

In this step, as shown in FIG. 20 , a hanging tool 210 is provided between the wire grabbing position of the wire catching device 270a and the insulation barrier 300 . The hanging tool 210 is hung on the above-mentioned two suspension parts 216 in a manner to receive the electric wire 301 from above.

(c) Steps to connect the other end of the cable tensioner to the hanging tool

In this step, the connecting portion 220 of one end of the extending rod 212 of the hanging tool 210 hung on the wire 301 through the above step (b) and the cable tensioning device 270 are arranged relative to The paths of the insulator 300 are connected in series such that they form branch paths in parallel. Since nothing is connected to the connecting portion 221 at the other end of the hanging tool 210 in this state, tension cannot be generated thereon. However, since both ends of the tensioner 270b are suspended by the thread catcher 270a and the hanging tool 210, the operator can maintain the tensioner 270b very stably even without using a remote operating rod or the like.

(d) Steps of fixing the hanging tool to the utility pole fixing tool that is fixed to the utility pole

In this step, the rope-shaped body 184 of the utility pole fixing tool 180 that is previously installed on the utility pole 302 is connected to the connecting portion 221 of the extending rod 212 of the hanging tool 210 . Thereby, the branch path is connected in parallel with respect to the path in which the insulator 300 is arranged. In this case, the utility pole fixing tool 180 can be connected to the stable hanging tool 210 in the same way as the cable tensioner 270 is connected, so the work can be performed safely and easily.

(e) Steps to shrink the distance between one end of the cable tensioning device and the other end

In this step, the tensioner 270b of the cable tensioning device 270 is retracted in a state where a branch path is formed between the electric wire 301 and the utility pole 302 in the above steps (d). Thereby, the tension on the insulator 300 side is gradually lost, and the tension is switched toward the branch road side.

Next, including the steps (1) of (a) to (e) above, the steps of performing the work on the insulating barrier 300 side will be described using FIGS. 15 and 20 .

(2) Steps to use the insulating barrier support tool to support the insulating barrier from below

In this step, following step (1)-(e) above, the insulating barrier engaging portion 154 of the insulating barrier support tool 150 is engaged with the connecting portion of the insulating barrier 300 (see FIGS. 13 and 15 ). . Thereby, the insulator 300 which loses tension is supported in a stable state.

(3) Steps to connect the lifting wire of the pole-mounted lifting device to the insulating barrier support tool

In this step, as shown in FIG. 15 , the belt 4 of the pole lifting device 1 is connected to the wire connecting portion 158 of the insulation barrier support tool 150 . Furthermore, although FIG. 15 shows the state before the insulating barrier 300 is engaged with the insulating barrier engaging portion 154, the insulating barrier support tool 150 can also be used before the belt 4 is connected to the wire connecting portion 158. Supporting the insulator 300 can also be performed at the same time.

The connection position of the belt 4 to the insulating barrier support tool 150 can be appropriately selected according to the height difference between the insulating barrier 300 and the pole lifting device 1 . Therefore, when the height of the insulating barrier 300 is close to the height of the component to which the pole lifting device 1 is fixed (in this case, the metal cross arm 303 ), the suspension hole 154b of the insulating barrier engaging portion 154 can be selected. In the case of the arrangement as shown in Figure 15, since the insulating barrier 300 located at a higher position than the metal cross arm 303 on which the pole-mounted hoisting device 1 is arranged is the work target, the belt 4 is connected to the The wire connecting portion 158 is at the middle position of the support rod 152 . By properly selecting the connection position in this way, a wide range exceeding the lifting limit height of the pole-mounted hoisting device 1 can be set as the target for operation.

(4) Steps to use the insulating barrier support tool to support while uncoupling the insulating barrier hoisted by the pole lifting device.

In this step, while supporting the insulating barrier support tool 150 that is connected to the belt 4 of the pole lifting device 1 and stabilized, a disconnecting tool (not shown) is used to release the connection of the insulating barrier 300 .

For example, in the case of a ball-and-socket connection structure, the connection can be unlocked by pushing up the locking spring from below. In this operation, if the insulating barrier support tool 150 is used for support, the insulating barrier that has lost tension will be stable, so the operating efficiency will be improved.

In addition, if the blocking portion 156 of the insulating barrier engaging portion 154 is first set to a closed state, the insulating barrier 300 can be prevented from floating upward, so the operation will be more stable. Different from the construction method of this embodiment, when the insulating barrier 300 is directly lifted using the pole lifting device 1, it is necessary to use the holding tool 304 or the like to press the insulating barrier 300 in order to stabilize it. , but according to this construction method, the holding tool 304 can be replaced by an insulator supporting tool 150.

Furthermore, if the connection of the insulation barrier 300 is released, the path between the electric wire 301 and the electric pole 302 is broken, so the free end of the electric wire 301 becomes unstable. However, in the construction method of this embodiment, in the step (b) of the above-mentioned step (1), the free end of the electric wire 301 is accommodated in the suspension portion 216 of the hanging tool 210, so inadvertent hanging can be prevented.

That is, in the state before the tension is switched from the insulating barrier 300 side to the branch road side, the hanging tool 210 is stably suspended by the tension on the insulating barrier 300 side, so the cable tensioning device 270 and the pair are connected. The utility pole fixing tool 180 facilitates work. On the contrary, after the tension is switched from the insulation barrier 300 side to the branch road side, the wire 301 with the tension gone can be stably hung on the hanging tool 210 side. Therefore, after separation, when assembling a new insulating barrier 300, the free end of the wire 301 can be pre-arranged near the working position. Therefore, in addition to improving the work efficiency, the wire 301 can also be prevented from falling.

(5) The step of using the insulating barrier support tool to support the unconnected insulating barrier, and at the same time using the power of the lifting device on the pole to lift it and separate the insulating barrier.

In this step, the insulating barrier 300 is lifted up and separated using the pole lifting device 1 via the insulating barrier support tool 150 supported by the operator. Since the load is borne by the lifting device 1 on the pole, the burden on the operator will be reduced.

Through the above steps (1) to (5), the insulating barrier 300 causing the problem can be safely and easily separated. When assembling a new insulator 300, just perform the above steps in reverse.

The structure as described above is an example of the present invention, and the following modifications are also included.

In the above-described embodiment, for the horizontal side clamping portion 34 constituting the clamping portion 32 of the direction conversion tool 30 shown in FIG. The structure of the connecting plate 34a is shown as an example. However, if the width of the metal cross arm 303 made of angle steel or the like can be set in advance in the horizontal direction, it can also be configured to move the metal cross arm 303 with screws along the clamping direction, similarly to the vertical side clamping portion 40 .

In the above-described embodiment, the vertical side clamping portion 40 constituting the clamping portion 32 of the direction changing tool 30 in Fig. 2 is shown as an example in which a screw-type clamp is used. However, if it is configured to clamp metal cross arms such as angle steel in the vertical direction through remote operation, different types of clamps may be used.

Furthermore, in the above-described embodiment, the insertion hole 94a formed in the upper contact portion 94 of the direction changing tool 90 in FIG. 5 is made of a cylindrical member. However, if the insertion portion 108 of the inserted turning portion 104 is maintained to be stably rotatable in the vertical direction, it does not need to be a cylindrical member.

In the above-described embodiment, the clamping portion 92 as the metal cross arm mounting portion of the direction changing tool 90 in FIG. 5 is shown as an example in which the eye bolt 100a is used as the spacing fixing tool 100. However, as long as the structure can withstand the pushing force of the lifting portion 102 and maintain the distance between the upper contact portion 94 and the opposing portion 98 , the fixed structure using screwing of the eye bolt 100 a or the like may not be required.

Furthermore, in the above-described embodiment, the wire connecting portion 158 of the support rod 152 of the insulation barrier support tool 150 is formed with a suspension hole 154b for connecting to the belt 4 of the pole-mounted hoisting device 1. Example to express. However, if it is a detachable structure, it may also have a connection structure other than the suspension hole 154b and the belt connection part 6.

In addition, in the above-mentioned embodiment, the structure in which the closing part 156 which closes the opening of the insulating barrier engaging part 154 is penetrated and arrange|positioned on the side where the suspension hole 154b is not formed is shown as an example. However, a through hole may be formed on the side where the suspension hole 154b is formed. Furthermore, if the connecting portion of the insulating barrier 300 that can at least be engaged with the insulating barrier engaging portion 154 is blocked to an extent that it cannot pass through, the U-shaped end of the insulating barrier engaging portion 154 does not need to be closed. A structure in which parts are completely closed to each other.

Furthermore, in the above-described embodiment, the closing portion 156 that seals the opening of the insulating barrier engaging portion 154 is opened and closed by moving the closing rod 156a disposed therethrough in the longitudinal direction. . However, it may be configured to open and close by a rotational movement centered on an axis extending in a direction orthogonal to the longitudinal direction.

Furthermore, in the above-described embodiment, the utility pole fixing tool 180 is shown as an example in which the hanging rope portion 184a hanging through the rope-shaped body 184 is formed in a ring shape. However, if it is configured to be hung on the extending portion 184b side, it may be hook-shaped.

Furthermore, in the above embodiment, the utility pole fixing tool 180 is shown as an example in which the rope hanging portion 184 a for hanging the rope-like body 184 is provided on the same side as the gripping portion 188 . However, if one is extended from one end of the curved portion 182 and the other is provided near the other end of the curved portion 182 , the hanging rope portion 184 a may also be provided on the opposite side to the gripping portion 188 .

Furthermore, in the above-described embodiment, the utility pole fixing tool 180 is shown as an example in which the rope-like body 184 is arranged along the inner wall surface of the curved portion 182 , but it may also be arranged along the curved portion 182 . The outer wall is configured.

In addition, in the above-mentioned embodiment, the tool 180 for fixing a utility pole is shown as an example in which one rope-like body 184 is arranged along the curved portion 182 . However, the hanging rope part 184a may be connected to one end of the bent part 182, and the rope-like extension part 184b may be connected to the other end. Even with such a structure, it can be temporarily fixed by being mounted on the utility pole 302 using the elastic force of the bending portion 182, and after the extension portion 184b is hung on the hanging rope portion 184a, it can be tightened by the cable. The tension of the device 270 is automatically and formally fixed.

(industrial availability)

In the insulating barrier separation method of the present invention, since the insulating barrier is lifted by the insulating barrier support tool, the movable range in the height direction of the pole-mounted lifting device can be expanded. Therefore, it is particularly useful for replacing insulators when the heights of three three-phase AC transmission lines are different.

1‧‧‧Pole lifting device

4‧‧‧Belt

6‧‧‧Belt connector

150‧‧‧Insulator support tool

154‧‧‧Insulation barrier engaging part

158‧‧‧Wire connection part

300‧‧‧Insulating Barrier (Tension Resistant Insulating Barrier)

301‧‧‧Wires (overhead wires)

302‧‧‧Telegraph pole

303‧‧‧Metal cross arm

H‧‧‧Height difference

Claims (11)

An insulating barrier separation method uses a cable tensioning device and a pole lifting device to separate a tension-resistant insulating barrier from an overhead wire; it is characterized in that it includes: aligning the tension direction with the above-mentioned insulating barrier Steps for switching branch circuits including the cable tensioning device formed in parallel; using an insulating barrier support tool having a holding portion at one end and an insulating barrier engaging portion at the other end to support the insulating barrier from below The step of connecting the lifting wire of the above-mentioned pole-mounted lifting device to any position of the above-mentioned insulating rod support tool from the above-mentioned insulating rod engaging part to the middle part of the above-mentioned holding part; and while using The above-mentioned insulating barrier support tool is used to support the above-mentioned insulating barrier, and at the same time, the connection of the above-mentioned insulating barrier that has been lifted by the above-mentioned pole lifting device is released. An insulating barrier separation method uses a cable tensioning device and a pole lifting device to separate a tension-resistant insulating barrier from an overhead wire; it is characterized in that it includes: aligning the tension direction with the above-mentioned insulating barrier The steps of switching branch circuits including the above-mentioned cable tensioning device formed in parallel; the step of supporting the above-mentioned insulating barrier from below using an insulating barrier support tool; and connecting the lifting wires of the above-mentioned pole lifting device to the above-mentioned The steps of the insulating barrier support tool; and the step of using the above-mentioned insulating barrier support tool to support and simultaneously releasing the connection of the above-mentioned insulating barrier that has been lifted by the above-mentioned pole lifting device; wherein, the tension is directed toward the above-mentioned The steps of branch circuit switching include: using one end of the cable tensioning device to grasp the above-mentioned overhead wire; The steps of hanging a hanging tool hanging the other end of the above-mentioned cable tensioning device on the above-mentioned overhead wire; the step of connecting the other end of the above-mentioned cable tensioning device to the above-mentioned hanging tool; fixing the above-mentioned hanging tool The step of fixing the utility pole with a tool that is fixed to the utility pole; and the step of shrinking the distance between one end and the other end of the above-mentioned cable tensioning device. A pole-mounted lifting device used in the insulating barrier separation method described in claim 1 or 2; characterized in that it is provided with: an insulating barrier engaging portion that can engage with the insulating barrier; An operating rod, which makes the above-mentioned insulating barrier engaging part hang from the front end, and indirectly operates the suspended above-mentioned insulating barrier engaging part; and a direction conversion tool, which installs the above-mentioned operating rod on the telephone pole in a direction-reversible manner. Metal cross arms. The pole-mounted lifting device of claim 3, wherein the direction conversion tool is provided with: a metal cross arm mounting part having an insertion hole formed along the vertical direction and capable of being installed on the metal cross arm; and a turning part having The insertion part is rotatably inserted into the insertion hole of the metal cross arm mounting part, and has an operating rod fixing part for fixing the operating rod. The pole-mounted lifting device of claim 4, wherein the metal cross arm mounting part is provided with: an upper abutting part that is in contact with the upper part of the metal cross arm; and a vertical setting part that is located from the vicinity of the upper abutting part. It is installed vertically downward; an opposing portion is extended from the vertically installed portion to a position opposite to the upper contact portion; and a spacing fixing tool can fix the gap between the upper contact portion and the opposing portion. ; and a lifting portion provided on the facing portion in a configuration capable of being raised and lowered toward the upper contact portion. The pole-mounted hoisting device according to claim 5, wherein a hole is formed on the side of the vertical installation portion of the above-mentioned lifting portion into which the lower end edge of the above-mentioned metal cross arm formed by arranging an angle steel with one surface facing vertically downward can be inserted. End edge retaining part. An insulating barrier support tool, which is used in the insulating barrier separation method described in claim 1 or 2 and can be used in combination with a pole-mounted lifting device for hoisting the insulating barrier; it is characterized in that it has: support A rod having a holding portion at one end; an insulating stopper engaging portion provided at the other end of the support rod and capable of engaging with the connecting portion of the insulating stopper; and a wire connecting portion provided at the above-mentioned insulating stopper. The wire can be connected between the stopper engaging portion and the holding portion. As claimed in claim 7, the insulating rod supporting tool is characterized in that the wire connecting portion can change its position between the insulating rod engaging portion and the holding portion. A tool for fixing utility poles, which is used in the insulating barrier separation method described in claim 2 to fix a cable tensioning device for tensioning overhead electric wires to utility poles; it is characterized in that It is provided with: a bent portion having an inner diameter that is approximately the same as the outer diameter of the utility pole and is formed into an arc shape using an elastic material that exceeds half the circumference of the utility pole; and a rope-like body that is bent from the above-mentioned utility pole. One end of the part is extended; and a hanging rope part is provided at the other end of the above-mentioned bending part to hang the above-mentioned rope-like body. A tool for fixing telephone poles as claimed in claim 9, wherein the above-mentioned rope-like body and The above-mentioned hanging rope part is composed of a single member along the above-mentioned curved part. A hanging tool used in the insulating barrier separation method described in Claim 2, which allows one end of the cable tensioning device holding the erection wire to be suspended from the above-mentioned erection wire; it is characterized in that it It is provided with: an insulating rod having a connecting structure at both ends; at least one base portion fixed to the above-mentioned insulating rod; and a suspension portion having two engaging bodies that are connected to each other along virtual planes separated in parallel. The electric wire storage side is integrally formed so that the wire receiving sides face each other, and is pivotably supported relative to the base so as to be rotatable around a space between the two engaging bodies.

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