JP2000166068A - Adjusting appliance for tension of guy by elastic body made from resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost, and to make disassembling work safe and easy by using an elastic body made from resin such as polyurethane rubber as an elastic body for absorbing tension. SOLUTION: After inserting parallel bars 8, 9 into the inserting holes 17b, 17c of a first slide board 17 from the first locking board 7 of block A 1a through the use of nuts 19, 20, and after inserting the ends of the parallel bars into the inserting holes of a second locking board 24, they are united with nuts 22, 23. Besides, a hook 25 and the second locking board 24 are united by a bolt 27 through the use of nuts. This makes the construction simpler. Since tension generated inside a guy tension adjusting appliance 1 does not generate reaction force unless an adjusting nut 18 or 6 is screwed up, assembling is easy and safe. In addition, assembling on a site becomes easy too, even if the appliance is disassembled, carried, and brought to a mountainous region, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch line tension adjuster, and more particularly to an external force applied to a branch line of a power transmission / distribution pole, an external force caused by snow on an overhead power line, an abnormal temperature drop, and a wind pressure applied to a power pole or the like. The present invention relates to a branch line tension adjuster which automatically adjusts an external force or the like caused by the above and can be used to prevent bending or breakage of a power transmission / distribution pole, breakage of a branch line or an overhead line, and the like.

[0002]

2. Description of the Related Art Breakage accidents of power transmission / distribution poles or the like laid on various terrains, accidents of falling down, breakage of branch lines or overhead lines are places where a great deal of social damage is caused, for example, on slopes such as mountainous areas. Various branch line tension adjusters have been proposed that take into account that external forces caused by the movement of snow, earth and sand, and the like during typhoons, low temperatures, and the like do not cause breakage, lodging, or breakage of branch lines or trolley wires due to external forces due to movement of typhoons or low temperatures. .

[0003] The conventional branch line tension adjuster is designed so that an elastic member such as a coil spring is connected between the upper end of the utility pole and the end of the branch line, and the tension acting on the branch line is absorbed by expansion and contraction of the elastic member. It was made.

One example is shown in FIG.
No. 83516, by selecting a spring so as to balance an increase in wire sag due to an external force such as snow and wind pressure with an increase in spring force due to a spring constant.
It is possible to prevent an excessive increase in tension and sag of the electric wire.

[0005]

However, according to the above-mentioned apparatus, the coil spring 51 always expands and contracts even under a slight load such as a breeze, and a repeated stress is applied. Since the outer cylinder 50 is provided, when the coil spring 51 is compressed, buckling occurs and the coil spring 51 comes into contact with the inner periphery of the outer cylinder 50 to generate friction,
Disadvantage of large loss to load and outer cylinder 50
Therefore, there is also a disadvantage that the cost is increased due to the above.

The biggest drawback is that the metal spring structure and the outer cylinder 50 make it heavy and difficult to transport with human power, and it is extremely difficult to perform installation work especially at places where vehicles cannot travel, such as mountainous areas. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the conventional apparatus, and has been made at a low cost to produce a branch line tension adjuster which achieves the above-mentioned functions and which can be easily mounted for transportation by manpower. It is another object of the present invention to provide a branch line tension adjuster capable of performing disassembly operation safely and easily.

[0008]

SUMMARY OF THE INVENTION In a branch line tension adjuster which is connected between an upper end of a power pole and an end of a branch line to adjust the tension of the branch line, an elastic body for absorbing the tension is made of urethane rubber. A branch line tension adjuster characterized by comprising a resinous elastic body such as

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

In the branch line tension adjusting device 1 according to the present invention, as shown in FIG. 1 or 2, a resin elastic body for transmitting tension is interposed between hooks 2 and 25 provided so as to be connected to the branch line. As a result, the above object has been rationally achieved.

FIG. 3 is a left side view of the branch line tension adjuster 1 according to the present invention. Next, FIG. 4 is a sectional view of the branch line tension adjuster 1 according to the present invention.

The detailed form will be described with reference to FIG.

First, the left half in the figure is an A block 1a and the right half is a B block 1b, and the A block 1a will be described in detail.

A hook block 3 is fixed to the hook 2 at the end of the A block 1a by welding or the like, and has an insertion hole 3a at the center thereof.
Has external threads 4a and 4b on both sides thereof. A nut 5 contacts an outer end face of the hook block 3, and a nut 6 contacts an inner end face thereof. The other end of the nut 6 is in contact with the first locking plate 7.

The first locking plate 7 has an insertion hole 7a in the center where the rod 4 is inserted, and insertion holes 7b and 7c on the outside of which the parallel bars 8 and 9 are inserted.

After the rod 4 is slidably inserted through the first locking plate 7, a first sleeve 10 is loosely fitted to the outside thereof. The sleeve 10 is located at an intermediate position of the outer surface.
a.

A first resin elastic body 11 is loosely fitted to the outside of the sleeve 10, and the first resin elastic body 11
Has one end in contact with the first locking plate 7 and the other end in the first slot.
It is in contact with the collar 10a of the hub.

A predetermined gap 30 is provided between the first locking plate 7 and the first sleeve 10. This gap 30
Is a dimension that makes contact when the load exceeds a certain level to protect the resin elastic body 11.

Further, after the rod 4 is inserted through the first sleeve 10, the rod 4 is then loosely fitted to the second sleeve 12, and the second sleeve 12 is likewise positioned at a middle position on the outer surface. 12a.

A first sleeve 10 and a second sleeve 12
A second resin elastic body 13 is assembled so as to be loosely fitted on the outside of the first elastic body 13, and one end of the second resin elastic body 13 contacts the flange 10 a of the first sleeve 10, The other end is second
Is in contact with the collar 12a of the sleeve 12.

A first sleeve 10 and a second sleeve 12
Between them, a predetermined gap 31 is provided. The gap 31 is dimensioned to be in contact with the resin elastic body 13 in order to protect the elastic body 13 when the load exceeds a certain level. Further, after the rod 4 is inserted through the second sleeve 12, the rod 4 is loosely fitted to the third sleeve 14, which also has a flange 14a at an intermediate position on the outer surface. ing.

The second sleeve 12 and the third sleeve 1
A third resin-made elastic body 15 is assembled so as to be loosely fitted to the outside of the fourth member 4, and one end of the third resin-made elastic body 15 comes into contact with the flange 12 a of the second sleeve 12. The other end is in contact with the flange 14a of the third sleeve 14.

The second sleeve 12 and the third sleeve 14
Between them, a predetermined gap 32 is provided. The gap 32 is dimensioned to be in contact with the resin elastic body 15 in order to protect the elastic body 15 when the load exceeds a certain level.

The fourth resin elastic body 16 has one end in contact with the flange 14 a of the third sleeve 14 and the other end in contact with the end surface of the first slide plate 17. A predetermined gap 33 is provided between the third sleeve 14 and the first slide plate 17. When the load exceeds a certain value, this gap 33
The dimensions are such that they contact to protect the resin elastic body 16.

The first slide plate 17 is provided on the first locking plate 7.
In the same manner as described above, there is an insertion hole 17a at the center where the rod 4 is inserted, and the insertion hole 1 through which the parallel rods 8 and 9 are inserted outside.
7b and 17c.

The other end of the rod 4 is in contact with the end face of the first slide plate 17 in a form in which the first slide plate 17 is inserted through the first slide plate 17 and then connected by an adjusting nut 18 under load.

The parallel bar 8 is inserted through the insertion hole 7b of the first locking plate 7, and passes through the insertion hole 17b of the slide plate 17 through the outside of the resin elastic body.

Similarly, the parallel bar 9 passes through the insertion hole 7c of the first locking plate 7, and passes through the insertion hole 17c of the slide plate 17 through the outside of the resin elastic body.

The same configuration as the block B is generally formed on the right side in the drawing as opposed to the block B.

Therefore, the parallel rods 8 and 9 are brought into contact with the outer end faces of the first locking plate 7 by the nuts 19 and 20 (preferably double nuts) via the screw portions provided at both ends thereof, and the first slide plate is provided. 17, the second slide plate 21 is inserted, and the nuts 22, 23 (preferably double nuts) are inserted into the second slide plate 21 so as to come into contact with the outer end surface of the second locking plate 24 via the screw portion. Accordingly, the first locking plate 7 and the second locking plate 24 are connected and fixed so as not to move more than the elongation due to the elastic deformation of the parallel bar with respect to the tension.

With such a configuration, the tension applied to the branch line can be reduced by the nut 5 and the adjustment nut 18 by the hook 2.
, A fourth resin elastic body, a third sleeve flange 14a, a third resin elastic body, a second sleeve flange 12a, Resin elastic body,
The load is transmitted to the first locking plate 7 via the first sleeve flange 10a and the first resin elastic body. At this time, the respective elastic members made of resin undergo compressive bending according to the tension as shown in FIG. 6, so that the first locking plate 7 slides with respect to the rod 4.

The load is transmitted to the second locking plate 24 from the first locking plate 7 via the nuts 19, 20 while the parallel bars 8, 9 slightly expand due to elastic deformation.

Thereafter, the load is transmitted in the B block in the same reverse flow, and reaches the hook 25.

FIG. 5 shows a state in which the adjusting nut 18 of the A block (the nut 26 for the B block 1b) is not tightened at all.

In this state, no tension is generated at all in the rod 4 and the rod 4 is in a free state.

Therefore, for example, a resin elastic body formed in a drum shape has a small outer shape at the center. No protrusion of the threaded portion of the rod 4 is seen at the end of the adjusting nut 18.

FIG. 2 shows the adjusting nut 18 of the A block 1a.
(B block 1b is nut 26) shows the appearance when tightened by a predetermined amount, and the resin elastic body is in a state of maintaining the initial supporting force.

This is referred to as a normal containment load, which is the sum of the load at the time of the branch line tensioning work and the normal electric wire load, and is usually set in advance by tightening to a load of about 350 kgf to 600 kgf. This load is held by the compression bending of the resin elastic body. Therefore, the length of the resin-made elastic body is shortened by the amount of bending, and the outer shape has a larger diameter at the central portion and is substantially cylindrical.

FIG. 6 shows a state in which a load is applied over the initial supporting force. The length of the resin elastic body is further shortened by the amount of bending, and the outer shape has a larger diameter at the center and a drum-like shape. It has become.

As shown in FIG. 9, the branch line tension adjusting device having the above-described structure is connected to a branch line 41 having hooks 2 and 25 on both sides fixed to the upper end of a telephone pole 40 and a branch line 43 connected to an anchor 42 on the ground G. When the resin elastic body is coupled between the first and second portions, an initial supporting force is applied, and the resin elastic body is compressed while gradually increasing a reaction force against an external force that is a load greater than the initial supporting force, thereby absorbing the displacement. .

When the load further increases and the reaction force and the displacement limit are reached, the gap between the sleeves comes into contact with each other, and a single metal part is used to prevent buckling of the resin elastic body. It functions as a rigid body and restores when the external force is removed, and the branch line 4
3 can be automatically adjusted.

Accordingly, when the branch line tension adjuster 1 of the present invention slides down the snow S (J indicates the slide down of the snow S) or landslides, cuts the branch line 43 at the time of low temperature, strong wind, etc.
It is possible to prevent the breakage of zero.

Normally, the moving load acting on the branch line when the snow slides depends on the amount of snow, but the moving load varies from 1,000 kgf to 1,000 kgf.
The load becomes 500 kgf, and the branch line tension generated by this load becomes 8,000 kgf at the maximum. The gap between the sleeves is set so that the bending required to reduce the tension functions in the resin elastic body.

When an excessively large gap size is given to the adjuster, there is a possibility that the electric pole may be broken beyond the allowable bending of the electric pole, or a contact accident between the electric wires due to loosening of the overhead line may occur. The gap between the sleeves is determined so as to function as a single rigid body when the gap exceeds the above gap dimension.

FIG. 7 shows the procedure for assembling the components of the A block 1a.

As shown in the figure, a slide plate 17 is loosely fitted to the parallel bars 8 and 9, and the rod 4 is inserted into a through hole 17a at the center of the slide plate 17, and the adjusting nut 1 is attached to the end.
8 is attached via the male screw 4b. Next, a fourth resin elastic body 16, a third sleeve 14, a third resin elastic body 15, a second sleeve 12, a second resin elastic body 13, a first resin elastic body 15, Sleeve 10, first resinous elastic body 1
1, the first locking plate 7 is inserted in this order, and a rod 4
The nut 6 is attached via the male screw 4a. At that time, the parallel bars 8 and 9 are inserted into the insertion holes 7b and 7c, respectively, and attached to the end of the 19-bar parallel bar 8 and the end of the 20-bar parallel bar 9 respectively. Further, the rod 4 is inserted into the insertion hole 3a of the hook block 3. It is inserted and the nut 5 is attached to the final end.

It is easy to assemble in the above manner. The disassembly can be performed in a completely reverse procedure.

In this embodiment, the tension generated inside the branch line tension adjusting tool 1 does not generate a reaction force unless the adjusting nut 18 or 6 is tightened, so that assembly is easy.
And secure. In addition, it has the effect of being easy to assemble on site even when brought into a mountainous area or transported in a disassembled state.

The structure shown in FIG. 8 shows the structure described in claim 2, wherein the parallel rods 8, 9 are connected to the first locking plate 7 of the A block 1a via nuts 19, 20. 1
After the insertion holes 17b and 17c of the slide plate 17 are inserted, a second locking plate 24 is inserted into the end of the parallel bar.
After inserting b and 24c, they are connected by nuts 22 and 23. The hook 25 and the second locking plate 24 are connected by bolts 27 via nuts 28 and 29.
According to this structure, a simpler structure can be provided.

[0050]

As described above, when the branch line tension adjusting device of the present invention is connected between the branch line band fixed to the upper end of the telephone pole and the end of the branch line connected to the anchor on the ground G, the initial support is achieved. It is installed with power applied.

With respect to an external force which is a load greater than the initial supporting force, the resin elastic body absorbs the external force by being compressed while gradually increasing the reaction force.

When the displacement reaches the limit, the gaps between the sleeves abut each other, the metal parts function as a single rigid body so as to prevent the buckling damage of the resin-made elastic body, and the external force is further removed. Then, it is possible to restore and automatically adjust the length of the branch line.

Therefore, the branch line tension adjuster 1 of the present invention prevents the sliding down of the snow S (J indicates the sliding down of the snow S), or the breaking of the branch line and the breakage of the telephone pole in the event of landslide, low temperature, strong wind, etc. It becomes possible. Usually, the size of the gap between the sleeves is determined so that the resin elastic body bends up to the moving load when snow falls.

As shown in FIG. 7, since the individual parts have a simple structure, the assembly is extremely easy, and the tension generated inside the branch line tension adjusting tool 1 is such that the adjusting nut 18 is tightened in this embodiment. Otherwise, no reaction force is generated, so that assembly is easy and safe. In addition, it has an effect that it is easy to assemble on site even if it is brought into a mountainous area or transported in a disassembled state.

In addition, the branch line tension adjuster 1 of the present invention has a first
Since there is no outer cylinder 50 or mechanical spring 51 of the conventional example shown in FIG. 0, the overall weight can be greatly reduced. For example, while the conventional branch tension adjuster having a mechanical spring structure is 17 kg, the branch tension adjuster 1 of the present invention used for the same tension can be reduced to 10 kg, which is about 60%.

Usually, as the material of the resin-made elastic body, a resin such as urethane rubber having weather resistance to solar radiation, high temperature and low temperature, strength against earth and sand, and the like can be freely selected.

Therefore, in view of the characteristic of the spring constant, it is possible to design the mechanical spring structure so that the weight can be greatly reduced, so that it is extremely easy to transport to a mountain or the like.

This is very convenient in places where it cannot be carried in by car, and can be easily installed in places where conventionally difficult work is required by human power. Since the process and cost of the process are efficient, there is also a merit that can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a branch line tension adjuster according to the present invention.

FIG. 2 is a front view of a branch line tension adjuster according to the present invention.

FIG. 3 is a side view of one side of a branch line tension adjuster according to the present invention.

FIG. 4 is a sectional view of a branch line tension adjuster according to the present invention.

FIG. 5 is an external view of the branch line tension adjusting device according to the present invention in a state where it is not tightened at all.

FIG. 6 is an external view when a load equal to or more than an initial set force is applied to the branch line tension adjuster according to the present invention.

FIG. 7 is an assembly procedure diagram of a branch line tension adjuster according to the present invention.

FIG. 8 is a sectional view of a branch line tension adjuster according to a second aspect of the present invention.

FIG. 9 is a view showing a state in which the branch line tension adjuster according to the present invention is coupled between the upper end of the utility pole and the end of the branch line.

FIG. 10 is a front view of a conventional device used as a branch line tension adjuster.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Branch line tension adjuster 1a ... A block of branch line tension adjuster 1b ... B block of branch line tension adjuster 2 ... Hook 3 ... Hook block 3a ... Hook block insertion hole 4 ... Rod 4a Male screw at one end of rod 4b Male screw at the other end of rod 5, 6 Nut 7 First locking plate 7a Central insertion hole of first locking plate 7b ... insertion hole for parallel bar of the first locking plate 7c ... insertion hole for parallel bar of the first locking plate 8, 9 ... parallel bar 10 ... first sleeve 10a ... flange of first sleeve 11 First elastic body made of resin 12 Second sleeve 12a Flange of second sleeve 13 Second elastic body made of resin 14 Third sleeve 14a Third sleeve collar 15... Third resin elastic body 16... Fourth resin elastic body 17. 7a: Central insertion hole of the first slide plate 17b: Insertion hole for the parallel bar of the first slide plate 17c: Insertion hole for the parallel bar of the first slide plate 18: Adjustment nut 19, 20 Nut 21 2nd slide plate 21a ... central insertion hole of 2nd slide plate 21b ... insertion hole for parallel bar of 2nd slide plate 21c ... insertion hole for parallel bar of 2nd slide plate 22, 23 ... nut 24 ... 2 locking plate 24a: central insertion hole of second locking plate 24b: parallel rod insertion hole of second locking plate 24c: parallel rod insertion hole of second locking plate 25: hook 26 ... Adjustment nut 27 Bolt 28, 29 Nut 30, 31, 32, 33 Gap 40 Telephone pole 41 Branch line band 42 Anchor 43 Branch line 50 Outer cylinder 51 Coil spring

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinkazu Yoshino 1-3-1 Uchisaiwai-cho, Chiyoda-ku, Tokyo Tokyo Electric Power Company F-term (reference) 5G367 AA02 AD06 AD13 FA02

Claims (3)

[Claims] 1. A branch line tension adjuster which is connected between an upper end of a telephone pole and an end of a branch line to adjust the tension of the branch line, wherein an elastic body for absorbing the tension is made of resin such as urethane rubber. A branch line tension adjuster characterized by comprising an elastic body. 2. A rod connected to one of the hooks passes through the center of the first locking plate and the first sliding plate, and has male threads at both ends of the rod. And the first slide plate are load-coupled to each other.
A resin elastic body such as urethane rubber is sandwiched between the locking plate and the first slide plate, and a sleeve is further provided inside the resin elastic body. By tightening an adjusting nut, the resin elastic body provides an initial supporting force. The sleeve is held, and the sleeve is formed to be shorter than the resin elastic body by a predetermined dimension. When the resin elastic body undergoes compression bending due to an excessive load, the sleeve directly contacts the first member. It has a function of preventing buckling of the elastic body made of resin by supporting between the stop plate and the first slide plate. The first locking plate is connected to the parallel bar via a nut, and the first lock plate is connected to the parallel bar. After inserting the first slide plate, further inserting the second locking plate into the end of the parallel bar, and then connecting the second locking plate with a nut, the second locking plate is connected via a nut by a central bolt. Configured to transfer load to the other hook Branch line tension adjuster. 3. A branch line tension adjuster which is connected between an upper end of a utility pole and an end of a branch line to adjust the tension of the branch line, the entirety of which is composed of an A block and a B block.
The configuration of the block is such that a rod connected to one hook passes through the center of the first locking plate and the first sliding plate, and has male threads at both ends of the rod. The first locking plate and the first sliding plate are coupled in a load-like manner, and a resin elastic body such as urethane rubber is sandwiched between the first locking plate and the first sliding plate. −
The resin elastic body retains the initial supporting force by providing the sleeve and tightening the adjusting nut. Further, by forming the sleeve shorter by a predetermined dimension than the resin elastic body, the resin elastic body is formed. When the compressive bending occurs due to an excessive load, the sleeve directly supports between the first locking plate and the first slide plate, and the sleeve shares the load, so that the buckling of the resin elastic body is broken. It is characterized by having a function of preventing Next, the first locking plate is connected to the second locking plate of the B block having the same configuration via a nut and a parallel bar, and is further connected to the second locking plate of the B block having the same configuration as the A block. A branch line tension adjuster characterized by being connected to one hook.