JP2593220Y2 - Tension-relaxation adjustment device for overhead wires - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for adjusting the tension of a power line or a communication line such as a power line laid over a power pole or the like.

[0002]

2. Description of the Related Art Conventionally, in the operation of removing or relocating power lines, communication lines, and the like laid over telephone poles, after removing tension after relaxing the tension of the overhead lines, the removal is performed. Has been relocated. The overhead wires are supported on the upper part of a plurality of electric poles erected at intervals of several tens of meters, and in the stretch fixed state, the electric poles at the intermediate position are also fixed and the electric poles arranged at the extreme ends on both sides are fixed. Even in the fixed state, it is stretched with an appropriate tension. The overhead wires are fixed to a telephone pole at an intermediate position by a winding grip or a support fitting. The overhead wires are fixed to each utility pole while maintaining a certain level of tension.However, when removing and relocating the overhead wires, if the fastening of the overhead wires to the utility pole is suddenly released, the Therefore, it is necessary to transfer the tension to the overhead wires to be shifted while gradually relaxing the tension. In this conventional tension-relaxing operation, first, the overhead wire is removed from a support such as a winding grip or a support bracket fixed to a telephone pole at an intermediate position, and the overhead wire is supported by a roller receiving member, so that the overhead wire can be moved in the longitudinal direction. I do. Thereafter, as shown in FIG. 10, the worker climbs up on the electric pole at the extreme end, and detachably winds a hand wire around the electric pole at a position above the winding grip holding the overhead wire to the electric pole. The pulley portion at the end of the wire of the drawer was connected to the overhead wire with a shimmer (product name) or the like. Then, the worker activates the wire tensioner to tighten the wire to support the tension of the overhead wire on the wire tensioner, and removes the loosened winding grip from the utility pole. Was reversely operated to relax the tension of the overhead wire while loosening the wire, and after the overhead wire was almost in a tensionless state, the drawer was removed and the overhead wire was removed or relocated.
In addition, as shown in FIG. 11, when the wire length of the wire tensioner is insufficient to relax the tension, a rope is captured on a utility pole when the tension is removed to some extent, and the rope is connected to the overhead wire. To remove the cable from the overhead wire and the telephone pole, and the worker on the telephone pole pulls out the rope while slipping off the telephone pole until there is no tension.After removing the rope, the overhead wire is removed or relocated. .

[0003]

[Problems to be Solved by the Invention] However, the operation of relaxing the tension by operating the wire tensioner, the rope, etc. on the telephone pole requires skill, and furthermore, the root of the telephone pole is buried shallowly or the root is rotted. If the supporting power of the utility pole is weakened, the utility pole collapses and stretches on the utility pole when the overhead wire slackens and becomes nearly tensionless and the tension balance between the utility pole and the overhead wire is lost. There was a risk that a worker operating a wire device or a rope would fall and encounter a personal injury.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to route a cable connected to an overhead wire from a telephone pole to the ground, grasp an operator, and reduce the tension of the overhead wire. The wire tension can be easily relaxed while the cable is gradually pulled out in the direction of the overhead wire while the section is held by the worker on the ground, and even if the utility pole collapses without the operator relaxing the tension on the utility pole It is an object of the present invention to provide a tension-relaxation adjusting device for overhead wires which can be evacuated promptly, has no danger during work, and can improve safety.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides at least two spaced apart fixed rollers 12,12 and at least two fixed rollers 12,12.
And a movable roller 14 provided in the vicinity of the fixed roller 12 so as to be able to advance and retreat toward the interval between the fixed rollers 12, 12,
Is adjusted from the one fixed roller 12 to the moving roller 14, and further adjusted to the other fixed roller 12.

The fixed rollers 12, 12 and the moving roller 14 are provided in a machine frame 16, and the machine frame 16 has
An attachment fixing portion 48 may be provided.

The moving roller 14 may be always biased by a spring 44 in a direction away from the fixed roller 12.

[0008]

In order to relax the tension of the overhead line laid on the utility pole using the tension and relaxation adjusting device for overhead wires according to the present invention, the worker carries the tension relaxation adjusting device and climbs up to the utility pole, and the mounting and fixing portion. The worker on the utility pole descends with one end of the cable that is fixed and connected to the utility pole connected to the end of the overhead wire, and the other end of the cable is pulled and gripped by a worker on the ground. Since the ground worker is pulling and gripping the cable, the cable is locked by the clamping friction force between the two fixed rollers and the moving roller in the tension-relaxation adjusting device, and is simultaneously connected to the overhead wire. The overhead wire is loaded with overhead wire tension, and the overhead wire tension and the frictional force between the rollers are balanced. Then, when the worker on the ground releases the traction of the cable, the frictional force for pinching the roller of the cable in the tension relaxation adjusting device is released, and the cable is fed out to the cable side by the cable tension. When the operator pulls the cable again, the roller clamping frictional force and the wire tension are balanced and the cable is locked. Like this
An operator on the ground alternately repeats pulling and opening of the cord of the tension-relaxation adjustment device, so that the cord on which a large overhead tension is applied can be safely moved little by little toward the overhead wire while operating with a small pulling force. The wire tension can be gradually relaxed, and finally the tension-free state can be obtained. Also, even if the power pole collapses due to a loss of tension balance during the work, the ground worker can evacuate promptly and prevent personal injury.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 5 show a tension-relaxation adjusting device 10 for an overhead wire according to an embodiment of the present invention. In the figure, the tension-relaxation adjusting device 10 for overhead wires includes at least two fixed rollers 12, 12, and the fixed rollers 12, 12.
A movable roller 14 is provided in the vicinity of the movable roller 12 such that the movable roller 14 can move toward and away from the fixed rollers 12.

The fixed rollers 12, 12 and the movable roller 1
Reference numeral 4 is formed of a metal, a hard synthetic resin, or the like as a raw material, and is provided in the machine frame 16. The machine frame 16 is made of a metal plate, a hard synthetic resin plate, or the like, and includes substrates 18, 18 which are rectangular and whose lower ends are cut at an acute angle to face each other.

As shown in FIG. 4, upper support shafts 20, 20 are protrudingly fixed at the upper end corners of the board surface of one of the substrates 18, and the left and right sides are slightly above the center of the same substrate 18. Roller shafts 22 are protruded and fixed to face each other, and the fixed rollers 12 are suspended around the roller shafts 22.

The upper support shafts 20, 20 and the roller shaft 2
Screws are formed at the ends of the second and the second 22, and the holes provided on the other substrate 18 are inserted into these screw portions, and as shown in FIGS. The other substrate 18 is attached to and detached from the upper support shafts 20 and 20 and the roller shafts 22 and 22 by nuts 24 screwed to the threaded portions penetrated. This makes it possible to easily perform maintenance and inspection of the fixed rollers 12, 12 by removing one of the substrates 18.

[0013] As shown in FIG.
Shaft holes 26, 26 are opened at the lower end portions of the lower support shaft 28, and a lower support shaft 28 is supported by the lower support shaft 28. Engagement clips 32, 32 are engaged with both end protruding portions 30, 30 of the lower support shaft 28. Is being worn. In addition, vertical holes 34, 34 are formed in the substrates 18, on the upper side of the lower support shaft 28. A moving roller shaft 38 is passed through the vertical holes 34, 34 and the shaft hole 36 of the moving roller 14 fitted in the substrates 18, 18, and the both ends of the moving roller shaft 38 are engaged with the projecting portions 40, 40. Stop clips 42, 42 are engaged. Further, the projecting portions 30, 30 at both ends of the lower support shaft 28 and the moving roller shaft 3
Coil springs 44, 44 for urging the moving roller shaft 38 in the direction of the lower support shaft 28 are stretched to the projecting portions 40, 40 at both ends of 8.

As shown in FIG. 4, a rope 46 such as a rope is adjusted from one of the fixed rollers 12 in the machine frame 16 to the moving roller 14, and the other of the fixed rollers 12
Is tuned to When a tension load is applied to both ends of the cable 46 in opposite directions, the moving roller 14 rises against the elasticity of the coil springs 44, 44, and the cable 4
The roller 6 is strongly pinched by the moving roller 14 and the fixed rollers 12, 12, and the rope 46 is locked by this roller pinching frictional force. When the tension load of one of the ropes 46 is released,
The moving roller 14 is lowered by the return elastic force of the coil springs 44, 44 and separated from the fixed rollers 12, 12, and as a result, the rope 46 from which the roller clamping frictional force has been removed is subjected to the other tension load. The tension load is fed out toward the end and the tension load is gradually relaxed.

As shown in FIGS. 2 and 3, the machine casing 16 is provided with a fixing portion 48 for attaching to a utility pole or the like. The mounting and fixing portions 48 are vertically separated from the upper surface of the outer surface of one of the substrates 18 of the machine frame 16 and are connected to the separating plates 50 and 50 in a substantially T-shape in plan view. A mounting plate 52 that is slightly curved toward the outer surface.
A bolt communication hole 54 communicating with each other is opened at a central position near each upper end of the substrate 2 and the substrates 18.

The mounting plate 54 is joined to the utility pole so that the bolt communication holes 54 formed in the mounting plate 52 and the substrates 18 and 18 communicate with the bolt holes formed in the electric poles and the like. By penetrating and fixing a long bolt from the outer surface of the hole 54 to the bolt hole of the utility pole, the tension relaxation adjusting device 10 for overhead wires can be firmly fixed at an upper position of the utility pole or the like, and the operation can be performed safely. . In addition, the bolt passage hole 54
Instead of opening the holes, a locking band is fixed to one end of the mounting plate 52, and a chuck or the like for attaching and detaching the locking band is provided at the other end of the mounting plate. It may be fixed.

Next, the operation of the tension-relaxation adjusting device 10 for overhead wires according to the present invention will be described. As shown in FIG. 6, when the overhead wire tension is relaxed in order to remove or relocate the overhead wire 58 such as a power line or a communication line laid over the electrical pole 56, first, each telephone pole supporting an intermediate position of the overhead wire 58 is supported. A support such as a winding grip 56 or a support fitting is replaced with a roller holder 60 to be supported.

Next, the end of the overhead wire 58 is stopped, and a worker rises to the utility pole 56a on the end side reinforced by the detent support line 61 and the like, and as shown in FIG. 7, the overhead wire 58 is pulled to the utility pole. At the position above the fixed winding grip 62, a hand wire 64 is detachably wound around a utility pole, and a wire stretcher 66 is connected thereto.
Pulley 70 around which the wire 68 is wound
It is connected to the overhead wire 58 at 72 or the like. The tension of the wire 58 is supported by the wire tensioner 66 while operating the wire tensioner 66 while tightening the wire 68, and the winding grip 62 from which the tension has been removed is removed from the telephone pole 56 and the wire end 58a.

Therefore, as shown in FIG. 8, the mounting plate 52 of the mounting and fixing portion 48 of the tension-relaxation adjusting device 10 for the overhead wire is joined to the position where the winding grip 62 of the telephone pole 56a at the end is removed. Bolt through holes 54 in boards 18, 18 and mounting plate 52
The tension relaxation adjusting device 10 of the overhead wire is fixed to the utility pole 56a by passing the long bolt 74 through the bolt hole of the utility pole 56a.

Then, the end of the cord 46 is connected to the overhead wire end 58a removed from the winding grip, and the ground worker grips the other end of the cord 46, and is pulled in the direction of arrow A in FIG. Let me be nervous. As a result, the moving roller 14 rises against the elasticity of the coil springs 44, 44 with the rope 46 tensioned in the machine frame 16 of the tension relaxation adjusting device 10,
The moving roller 14 and the fixed rollers 12, 12 make the rope 4
6 is pinched and locked. The worker on the utility pole 56a removes the cable stay 66 from the utility pole 56 by the shimmer 72 and the tail wire 64 that locks the pulley 70, and descends to the ground. At this time, as shown in FIG. 9, the roller clamping frictional force of the cord 46 clamped and locked by the tension / relaxation adjusting device 10 and the tension load acting on the overhead wire 58 in the direction of arrow B are balanced. become.

Next, when the worker on the ground releases the traction of the cable 46 in the direction of arrow A, the moving roller 14 is moved by the coil springs 44, 44 in the machine frame 16 of the tension-relaxation adjusting device 10.
Is lowered by the return elasticity, and the frictional force of pinching the roller of the cable 46 is removed, and the cable 46 is extended toward the overhead wire 58 by the overhead wire tension. When the worker again pulls the rope 46 in the direction of arrow A, the rope 46 is locked by the roller clamping friction force between the moving roller 14 and the fixed rollers 12, 12.

As described above, a large tension is applied while repeatedly pulling the rope 46 with a small force that presses the movable roller 14 against the elasticity of the coil springs 44 and 44 and presses the fixed rollers 12 and 12. The tension is gradually adjusted while the overhead wire 58 is locked, and the cable 46 is extended until the overhead wire 58 is in a tensionless state. After the overhead wire 58 has no tension, the overhead wire 58 is removed or moved from each utility pole 56.

Therefore, the tension relaxing operation can be easily performed while maintaining the overhead wire tension with a small traction force of the ground worker holding the rope 46 without the operator performing the tension relaxing operation on the telephone pole. Also, even if the utility pole collapses due to the tension balance of the overhead wire during work, it can be evacuated promptly and the utility pole can be held by the support member etc., improving the safety at work, and injuries to workers. Can be prevented. In addition, the tension-relaxation adjusting device 10 for the overhead wire of the present invention includes:
The tension of the overhead wire can be relaxed and adjusted while being used not only for the electrical pole at the end portion side of the overhead wire 58 but also for a power pole at an intermediate position of the overhead wire 58. In addition, the tension-relaxation adjusting device 10 for overhead wires of the present invention is used not only for tension-relaxation work for power lines and communication lines, but also for tension-relaxation work for support wires installed at construction sites, cableway sites, and the like. Work safety.

[0024]

As described above, according to the tension-relaxation adjusting device for an overhead wire according to the first aspect, at least two fixed rollers spaced apart from each other and the same near the fixed rollers. A moving roller provided so as to be able to advance and retreat toward the distance between the fixed rollers, wherein the cable is adjusted from the one fixed roller to the moving roller, and further adjusted to the other fixed roller. The operator can easily relax the tension of the overhead wires while holding a part of the overhead wire tension with a small traction force of the ground worker holding the cable without performing the tension relaxation operation at a high position such as on a utility pole. I can do it. Also, even if the utility pole collapses due to the tension balance of the overhead wire during work, it can be evacuated promptly and the utility pole can be held by the support member etc., improving the safety at work, and injuries to workers. Can be prevented.

According to the second aspect of the present invention, the fixed roller and the movable roller are provided in a machine frame, and the machine frame is provided with a fixing portion. Can be securely fixed to the utility pole and can perform work safely.

According to the third aspect of the present invention, the movable roller is always biased in the direction away from the fixed roller, so that the frame can be placed in any position or direction regardless of the position of the frame. The relaxation adjustment during the feeding operation can be reliably controlled.

[Brief description of the drawings]

FIG. 1 is a front view of a tension / relaxation adjusting device for overhead wires according to an embodiment of the present invention.

FIG. 2 is a rear view of the tension-relaxation adjusting device for overhead wires of FIG. 1;

FIG. 3 is a plan view of the tension-relaxation adjusting device for overhead wires of FIG. 1;

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view taken along line BB of FIG. 3;

FIG. 6 is an explanatory diagram showing an overhead line installed on a telephone pole.

FIG. 7 is an explanatory view showing a state in which a wire stretcher is attached to a telephone pole and an overhead wire on the end side.

FIG. 8 is an explanatory view showing a state in which a winding grip connected to an overhead wire is removed from a utility pole and a tension relaxation adjusting device is mounted on the utility pole.

9 is an explanatory view of removing the tensioner from the state of FIG. 8 and operating the tension relaxation adjusting device of the present invention to relax the tension of the overhead wire;

FIG. 10 is an explanatory view showing a conventional method of relaxing the tension of an overhead wire in which a wire tensioner is connected to a power pole and an overhead wire, and a rope trapped by the electrical pole is connected to an end of the overhead wire.

FIG. 11 is an explanatory view of the state in FIG. 10 in which the tensioner is removed and the overhead wire is relaxed only with the rope.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Tension / relaxation adjusting device for overhead wires 12 Fixed roller 14 Moving roller 16 Machine frame 46 Cable 48 Mounting and fixing portion 56 Telegraph pole 58 Overhead wire

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H02G 7/00-7/22 H02G 1/00-1/10

Claims (3)

(57) [Scope of request for utility model registration] At least two fixed rollers arranged at intervals, a moving roller provided in the vicinity of the fixed rollers so as to be able to advance and retreat toward an interval between the fixed rollers,
A tension / relaxation adjusting device for cords, wherein the cord is adjusted from the one fixed roller to the moving roller and further adjusted to the other fixed roller. 2. The tension / relaxation adjusting device for overhead wires according to claim 1, wherein the fixed roller and the moving roller are provided in a machine frame, and the machine frame is provided with an attachment fixing portion. 3. The tension-relaxation adjusting device for overhead wires according to claim 1, wherein the movable roller is constantly biased in a direction away from the fixed roller.