JP6756231B2 - Overhead wire branching jig and overhead wire branching device equipped with this - Google Patents

Description

The present invention relates to an overhead electric wire branching jig used when newly branching a branch line from an existing overhead electric wire and an overhead electric wire branching device provided with the jig, and is particularly gripped by a suspended steel tower at a branching point. The present invention relates to an overhead electric wire branching jig capable of suppressing the application of tension to the overhead electric wire and an overhead electric wire branching device provided with the jig.

Conventionally, when branching a branch line from an existing overhead wire, Article 54 of the Interpretation of Technical Standards for Electrical Equipment stipulates that "the facility must be installed so that tension is not applied to the wire at the branch point." There is. Regarding this point, when considering the case of a suspended steel tower, since the arm metal of the suspended steel tower is configured to suspend the overhead electric wire from above at one point via the suspension device, the swing of the overhead wire or the suspension device causes the suspension iron tower. Tension will be applied to the overhead wire at the branch point. Therefore, it violates the above provisions, and even if the tower is installed at the point closest to the power receiving point, if the tower is a suspended tower, the overhead electric wire cannot be branched. Therefore, it becomes necessary to rebuild the suspension tower with a tension tower or to branch a branch line from the tension tower near the power receiving point. Here, an example of a method of branching an overhead electric wire according to the prior art in the latter case will be described with reference to FIG. FIG. 8 is an external view for explaining an example of a method of branching an overhead electric wire according to the prior art.

As shown in FIG. 8, in a tension steel tower (not shown) in which the jumper wire 101 is held by the strain insulators 92, 92 attached to the arm 90 via the tension plate 91, the jumper wire The branch line 102 is branched using 101. Specifically, a portion where the jumper wire 101 is gripped by the suspension insulator 93 is provided as the branch point J. At this point, since the jumper wire 101 is held by the suspension insulator 93 so as not to swing, tension is not applied to the jumper wire 101 at the branch point J. Therefore, the branch line 102 can be branched without violating Article 54 of the interpretation of the technical standard for electrical equipment.
However, in this method, since the branch is branched at a point away from the power receiving point, the line length of the branch line 102 becomes long, which is uneconomical. Further, since it is necessary to newly install a strain insulator 91a for holding the branch line 102, it becomes uneconomical and the work required for branching becomes complicated.
Therefore, among such problems, in recent years, a technique relating to a tension-bearing device for easily branching an overhead wire has been developed for the purpose of solving the complicated work, and the invention has already been disclosed regarding it. ..

Patent Document 1 discloses an invention relating to a tension-bearing device attached to a tension-resistant steel tower under the name of "tensile-bearing device and yoke for tension-bearing device".
Hereinafter, the invention disclosed in Patent Document 1 will be described. In the invention disclosed in Patent Document 1, a yoke is provided between the tension clamp and the insulator, and a plurality of attachment portions for attaching the tension clamp are provided on the yoke in a direction in which a power line can be installed. It is characterized by being.

Before explaining the tension-bearing device having such a feature, first, the tension-bearing device according to an example of the prior art will be described. This conventional technique is a tension-bearing device that branches a power line supported by a tension tower without using a jumper wire, and is between a connected tool connected to the tower side and a tension clamp that holds the power line. Insulators are arranged in. That is, one tension clamp is provided for one tension measure. Therefore, for example, when the existing power line is branched into a T shape, the existing power line is temporarily transferred to the main body (tower body) side of the steel tower, and the existing tension device and tension plate (for two directions) are used. After removal, a three-way (T-shaped) tension plate is attached to the tip of the arm of the tower, and three tension devices are attached to this tension plate. Then, the temporarily transferred power line had to be returned to the original position, and the power line had to be held by the tension clamp of each tension device.

On the other hand, in the tension-bearing device having the above-mentioned characteristics, the power line is branched in a predetermined direction by attaching a new tension-resistant clamp to the mounting portion of the yoke and retaining the new power line with the tension-bearing clamp. To. Therefore, the power line fastened to the existing tension clamp can be left as it is. For this reason, it is not necessary to remove the existing tension plate, the labor and time required for branching the power line and the like are reduced, and the work safety is also improved.

Japanese Unexamined Patent Publication No. 2006-333651

However, in the invention disclosed in Patent Document 1, although it is possible to solve the problem that the work required for branching becomes complicated, it is a tension-bearing device used when branching a branch line from a tension-bearing tower. Temporarily, a mounting member provided with a mounting portion for additionally mounting a new suspension clamp between the suspension insulator series suspended from the suspension tower and the suspension clamp connected to the suspension insulator (Patent Document 1). Even if the branch line is gripped by a new suspension clamp (a member corresponding to the disclosed yoke), tension is still applied to the overhead wire at the branch point.
Therefore, the invention disclosed in Patent Document 1 cannot solve the problem that the line length of the branch line becomes long and becomes uneconomical.

The present invention has been made in response to such a conventional situation, and by making it possible to hold an existing overhead electric wire gripped by a suspension tower so that tension is not applied at a branch point, an electric facility is provided. It is an object of the present invention to provide an overhead wire branching jig capable of demonstrating easy workability and good economic efficiency, and an overhead wire branching device equipped with the jig, which satisfies Article 54 of the interpretation of technical standards.

In order to achieve the above object, the first invention includes an insulator chain suspended from an arm of a suspended steel tower, and a grip body connected to the insulator chain via a connecting body and gripping an overhead electric wire. It consists of a pair of holding bodies, which are attached to a suspension device and rotatably attached to the connecting body, and a pair of holding bodies provided on the outer periphery of the cylindrical body at an angle to each other. The body is arranged in the middle of the base end and the end of the branch line branched from the overhead electric wire, and is characterized in that the branch line is held.

In the invention having such a configuration, as the suspension device, for example, a suspension clamp composed of a plurality of insulators connected in a row and a suspension clamp connected to the insulator series via a connecting body which is a long metal fitting having a constant length. A known series of suspension insulator devices equipped with and is used.
Further, since the cylindrical body is attached to the connecting body, in this case, the length of the connecting body needs to be longer than the length of the cylindrical body. Note that "rotatable around the connecting body" is not limited to a configuration in which the cylindrical body is mathematically completely rotatable about the connecting body, but is centered on the vicinity of the connecting body. It is a concept that includes a rotatable configuration. Further, the cylindrical body may be attached at the time of assembling the connecting body or may be attached later.
Further, as the connecting body, an existing connecting member for the suspension device is used, or a new connecting member may be newly installed in consideration of the length of the cylindrical body in the longitudinal direction.
The branch line itself may or may not be cut at a portion held by the pair of holding bodies. However, when it is cut, it is necessary to ensure electrical continuity of the branch line via a cylinder made of a conductive material, a pair of holding bodies, and other connecting members.

In the invention having the above configuration, the cylindrical body is rotatably attached to the connecting body around the connecting body, and the pair of holding bodies are arranged in the middle of the base end and the end of the branch line branched from the overhead electric wire. Since it is installed and holds the branch line, the branch line can also rotate around the connecting body. Therefore, the swing of the branch line or the suspension device is converted into a motion of rotating the cylindrical body and the pair of holding bodies, and is not transmitted to the overhead electric wire.

Next, the second invention is characterized in that, in the first invention, the magnitude of the angle is 120 degrees.
In the invention having such a configuration, in addition to the action of the first invention, when the cylindrical body rotates as a rotation center, the pair of holding bodies have a wide range until they come into contact with the long members. It becomes rotatable over.

Further, the third invention comprises the first or second invention, wherein the connecting body is a long member longer than the connecting member already existing in the suspension device, and the long member is a substrate and the long member. A locking portion is provided along the longitudinal direction of the substrate, and the locking portion allows the cylindrical body to be rotatably attached around the locking portion and the cylindrical body to descend toward the grip body. A stopper is provided, and the stopper is characterized in that it constitutes a part of the locking portion closer to the grip body.
In the invention of such a configuration, the long member is provided in consideration of the case where the length of the cylindrical body is longer than the length of the existing connecting member. Therefore, the connection between the insulator chain and the grip body by the existing connecting member is naturally released.
Further, as the substrate, for example, a strip-shaped plate body can be considered. As the locking portion, for example, a structure in which a substantially U-shaped frame is provided on one surface of the substrate can be considered.
In the invention having the above configuration, even when the cylindrical body is attached to the locking portion, the stopper prevents the lower edge of the cylindrical body from reaching the grip body and hindering its rotation.

Then, in the fourth invention, in the third invention, the cylindrical body and the pair of holding bodies are both made of a conductive material, and the base end and the end end are each cut at one place between them. A side stump and a terminal stump are formed, and the base end side stump and the terminal side stump are fixed to one and the other of a pair of holding bodies, respectively, via a fastening member.
In the invention having such a configuration, in addition to the action of the third invention, since the cylindrical body and the pair of holding bodies are both made of a conductive material, they are electrically operated at the end of the cut branch line. Continuity is ensured.
Further, since the base end side stump and the end end side stump are fixed to one and the other of the pair of holding bodies via fastening members, the swing of the branch line and the suspension device can be efficiently held by the pair. It is converted into an integral rotation of the body and the cylinder.

Then, in the fifth invention, in the third or fourth invention, at least one of the proximal end telescopic means and the terminal telescopic means is provided, and the proximal end telescopic means is interposed between the proximal end and the overhead electric wire. The end telescopic means is characterized in that it is interposed between the end and the new suspension device suspended on the arm of the new tension tower.
In the invention having such a configuration, for example, a coil spring is used as the base end telescopic means and the end telescopic means.
In the invention having the above configuration, in addition to the action of the third or fourth invention, when a strong tension may be applied to the overhead wire, the coil spring is extended and this strong tension is reduced.

According to the first invention, since the swing of the branch line or the suspension device is not transmitted to the overhead electric wire, it is possible to suppress the application of tension to the overhead electric wire at the branch point.
Further, the first invention is composed of a cylindrical body and a pair of holding bodies, and can be manufactured at low cost due to an extremely simple structure, and can be easily attached to a connecting body.

According to the second invention, in addition to the effect of the first invention, the pair of holding bodies can rotate over a wide range until they each come into contact with the long member, so that the overhead wire is tensioned. Do not join. In addition, the branch wire can be easily attached to the pair of holding bodies.

According to the third invention, since the cylindrical body can be attached to the locking portion of the long member, the versatility is good without depending on the length of the existing connecting member. Further, since the stopper prevents the lower edge of the cylindrical body from descending beyond the lower end of the connecting body, the cylindrical body can be stably rotated around the locking portion.

According to the fourth invention, in addition to the effect of the third invention, electrical continuity is ensured at the end of the cut branch line, so that the disadvantage caused by cutting the branch line is eliminated. be able to. Further, since the swing of the branch line or the like is efficiently converted into the integral rotation of the pair of holding bodies and the cylindrical body, this swing is absorbed and tension is applied to the overhead wire at the branch point. You can be sure that there isn't.

According to the fifth invention, in addition to the effect of the third or fourth invention, the extension of the base end telescopic means and the end telescopic means can reduce the strong tension that is considered to be applied to the overhead electric wire, so that the suspension is suspended. It is possible to prevent disconnection of the overhead electric wire gripped by the steel tower and prevent damage to the newly installed suspension device.

(A) is a front view of the overhead wire branching jig according to the first embodiment, and (b) is a view taken along the line AA in (a). (A) and (b) are a front view and a side view of the long metal fittings constituting the overhead wire branching device according to the second embodiment, respectively. (A) is a front view when the overhead wire branching jig according to the first embodiment is attached to a long metal fitting, and (b) is a view taken along the line BB in (a). It is an external view which shows the use state of the overhead wire branching apparatus which concerns on Example 2. FIG. It is a side view of the long metal fitting provided with the overhead wire branching apparatus which concerns on 1st modification of Example 2. FIG. (A) and (b) are side views of the long metal fitting provided in the overhead wire branching device according to the second and third modified examples of the second embodiment, respectively. It is a side view of the long metal fitting provided with the overhead wire branching apparatus which concerns on 4th modification of Example 2. FIG. It is an external view for demonstrating an example of the branching method of the overhead electric wire which concerns on the prior art. It is a front view for demonstrating the structure of the suspension device.

The overhead wire branching jig according to the embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3 and 9. FIG. 1A is a front view of the overhead wire branching jig according to the first embodiment, and FIG. 1B is a view taken along the line AA in FIG. 1A. FIG. 9 is a front view for explaining the configuration of the suspension device.
First, the configuration of the suspension device will be described with reference to FIG. The suspension device 50 is connected to the insulator chain 52 suspended from the arm of the suspension tower via the mounting bracket 51 and the overhead wire 100 while being connected to the insulator chain 52 via the existing strip-shaped connecting member 53E. A series of suspension insulator devices including a gripping body 54 for gripping. In the insulator series 52, a plurality of insulators are continuously formed in a vertical row, but in this figure, only the top and bottom insulators are displayed, and the plurality of insulators in between are omitted. There is. Further, the grip body 54 is specifically a suspension clamp.

Subsequently, as shown in FIGS. 1 (a) and 1 (b), the overhead wire branching jig 1 according to the present embodiment is attached to the suspension device as shown in FIG.
The overhead wire branching jig 1 has a cylindrical body 2 that is rotatably attached to the long member 20 about the long member 20 (see FIGS. 2 and 3) and the cylindrical body 2 that forms an angle α with each other. It is composed of a pair of holding bodies 3 and 4 provided on the outer periphery of the. The magnitude of this angle α is 120 degrees.
Further, the cylindrical body 2 and the pair of holding bodies 3 and 4 are both made of iron, which is a conductive material.
Further, the pair of holding bodies 3 and 4 are arranged in the middle of the base end 102a and the end end 102d (see FIG. 4) of the branch line 102 branched from the overhead electric wire 100 to hold the branch line 102. Therefore, the pair of holding bodies 3 and 4 are provided with fixing holes 5 and 6 for fixing the branch line 102 by using fastening bolts (not shown), respectively. Such a configuration will be described in detail with reference to FIG.

Next, the overhead wire branching device according to the second embodiment will be described with reference to FIGS. 2 to 4. 2 (a) and 2 (b) are a front view and a side view of a long metal fitting constituting the overhead wire branching device according to the second embodiment, respectively. FIG. 3A is a front view when the overhead wire branching jig according to the first embodiment is attached to the long metal fitting, and FIG. 3B is a view taken along the line BB in FIG. 3A. Is. The components shown in FIG. 1 are designated by the same reference numerals in FIGS. 2 and 3, and the description thereof will be omitted.
As shown in FIGS. 2 and 3, the overhead wire branching device 1A according to the second embodiment includes the overhead wire branching jig 1 (see FIG. 1) according to the first embodiment, and is already installed in the suspension device 50. Instead of the connecting member 53E (see FIG. 9), a long member 20 is provided. The long member 20 is a member longer than the connecting member 53E, and includes a strip-shaped base 21 and a locking portion 22 provided along the longitudinal direction Y of the base 21, as well as an upper end 20a and a lower end. Fixing holes 21a and 21b for fixing to the porcelain chain 52 and the grip body 54 are bored in 20b, respectively.

The fixing holes 21a and 21b are configured to be able to communicate with the existing mounting holes 55b (see FIG. 4) at the lower end 52a of the insulator series 52 and the existing mounting holes 56a (see FIG. 4) at the upper end 54a of the grip body 54, respectively. Insulator. Therefore, the fixing bolts are passed through the fixing holes 21a and the mounting holes 55b, and the fixing holes 21b and the mounting holes 56a, respectively, and the upper end 20a and the lower end 52a of the insulator chain 52 and the long member are provided with nuts (not shown). By tightening the lower end 20b of 20 and the upper end 54a of the gripping body 54, respectively, the long member 20 connects the insulator series 52 and the gripping body 54.
Further, as shown in FIG. 2B, the locking portion 22 has a substantially U-shape composed of a vertical frame 22a and horizontal frames 22b, 22c in a side view. Of these, in the longitudinal direction Y, the length of the vertical frame 22a is longer than the length of the cylindrical body 2.
Further, as shown in FIG. 3B, in the locking portion 22, the cylindrical body 2 can rotate around the rotation center (marked with x in the figure) slightly forward of the vertical frame 22a of the locking portion 22. (Arrow R in the figure) is attached to the vertical frame 22a. Further, as shown in FIG. 2B, the locking portion 22 includes a stopper S that prevents the cylindrical body 2 from descending in the direction of the gripping body 54. The stopper S constitutes a horizontal frame 22c that is a part of the locking portion 22 near the grip body 54.

Next, the usage state of the overhead wire branching device according to the second embodiment will be described with reference to FIG. FIG. 4 is an external view showing a usage state of the overhead wire branching device according to the second embodiment. The components shown in FIGS. 1 to 3 are designated by the same reference numerals in FIG. 4, and the description thereof will be omitted.
As shown in FIG. 4, in the overhead wire branching device 1A according to the second embodiment, at the branch line 102, the proximal end 102a and the distal end 102d are cut at one place between them, and the proximal end side stump 102b and the distal end 102d are cut, respectively. A distal stump 102c is formed. Then, the base end side stump 102b and the end end side stump 102c have fastening bolts 7a, 8a and nuts (not shown) in the fixing holes 5 of the holding body 3 and the fixing holes 6 of the holding body 4, respectively. It is fixed to the pair of holding bodies 3 and 4 via the interposition.

Further, in the overhead wire branching device 1A, the terminal expansion / contraction means 9 which is a coil spring is provided. The terminal telescopic means 9 is interposed between the terminal 102d and the suspension device 71 suspended from the arm 70 of the newly installed tension tower.
The base end expansion / contraction means, which is a coil spring similar to the end expansion / contraction means 9, may be interposed between the base end 102a and the overhead electric wire 100. In addition, both the end telescopic means 9 and the base end telescopic means may be arranged at the positions described above.

In the overhead wire branching jig 1 and the overhead wire branching device 1A having the above configuration, the long member 20 connects the insulator chain 52 and the grip body 54 that grips the overhead wire 100, and the cylindrical body 2 is a vertical frame. The vertical frame 22a is rotatably attached to the vertical frame 22a slightly in front of the 22a, and the pair of holding bodies 3 and 4 hold the branch line 102 branched from the overhead electric wire 100, and thus are the base of the branch line 102. The end-side stump 102b and the end-side stump 102c can also be rotated around the vertical frame 22a. Therefore, the swing of the branch line 102 and the suspension device 50 is converted into a motion of rotating the cylindrical body 2 and the pair of holding bodies 3 and 4, and is not transmitted to the overhead electric wire 100.
Further, since the horizontal frame 22c as the stopper S suppresses the cylindrical body 2 from descending in the direction of the gripping body 54, the lower edge of the cylindrical body 2 reaches the gripping body 54 and its rotation is hindered. Is prevented.

Further, in the overhead wire branching jig 1 and the overhead wire branching device 1A, the base end side stump 102b and the end end side stump 102c are connected to the pair of holding bodies 3 and 4 via fastening bolts 7a and 8a, respectively. Since it is fixed to, the branch line 102 is hard to come off from the pair of holding bodies 3 and 4. Further, the branch line 102 from the proximal end 102a to the proximal end side stump 102b, the branch line 102 from the distal end side stump 102c to the terminal 102d, and each swing of the suspension device 50 are efficiently paired. It is converted into an integral rotation of the holding bodies 3 and 4 and the cylindrical body 2.
Further, since the cylindrical body 2 and the pair of holding bodies 3 and 4 are both made of iron, electrical conduction is ensured at the terminal 102d.

Since the size of the angle α is 120 degrees, as shown in FIG. 3B, when the cylindrical body 2 rotates as the rotation center (x mark in the figure), the pair of holding bodies 3 , 4 can rotate over a wide range (range of angle β) until they come into contact with the long member 20 (indicated by the alternate long and short dash line). This angle β was the maximum rotation of the holding body 3 in the clockwise direction and the maximum rotation in the counterclockwise direction when the pair of holding bodies 3 and 4 were viewed along the longitudinal direction Y of the cylindrical body 2. It is an angle formed by the holding body 4, and depends on the width of the long member 20 and the lengths of the horizontal frames 22b and 22c. In order for the cylindrical body 2 and the pair of holding bodies 3 and 4 to rotate sufficiently, it is necessary that the size of the angle α is sufficiently smaller than the size of the angle β.
On the other hand, when the pair of holding bodies 3 and 4 come into contact with the base 21 of the long member 20, excessive rotation of the pair of holding bodies 3 and 4 is prevented. Therefore, for example, when the holding body 3 abuts on the substrate 21 in a clockwise direction, the branch line 102 from the proximal end 102a to the proximal end side stump 102b and the branch line 102 from the distal end side stump 102c to the terminal 102d However, it is suppressed that it is strongly pulled by the pair of holding bodies 3 and 4, respectively. It is considered that the disadvantage of the pair of holding bodies 3 and 4 coming into contact with the substrate 21 is not particularly caused.

Further, since the terminal telescopic means 9 is interposed between the terminal 102d and the suspension device 71, when there is a possibility that a strong tension is applied to the overhead electric wire 100, the terminal telescopic means 9 is extended and this strong tension is reduced. .. In addition, instead of the terminal expansion / contraction means 9, the base end expansion / contraction means may intervene between the base end 102a and the overhead electric wire 100. The strong tension applied is reduced. Further, both the end telescopic means 9 and the base end telescopic means may intervene at predetermined positions, and in this case, the strong tension applied to the overhead wire 100 is further reduced.

As described above, according to the overhead wire branching jig 1 according to the first embodiment and the overhead wire branching device 1A according to the second embodiment, the swing of the branch line 102 and the suspension device 50 causes the overhead wire 100 to swing. Since it is not transmitted, tension can be prevented from being applied to the overhead wire 100. Therefore, in the suspension tower, the overhead electric wire 100 can be branched without violating Article 54 of the interpretation of the technical standard for electrical equipment.
Further, even if the iron tower installed at the point closest to the power receiving point is a suspended iron tower, the overhead electric wire 100 can be branched. Therefore, in addition to preventing the line length of the branch line 102 from becoming long, it is possible to install the overhead wire branching jig 1 by using the existing suspension device 50, so that the overhead wire branching jig 1 can be installed. Economic efficiency can be improved as compared with the case where the jig 1 is not used.
Further, since the overhead wire branching jig 1 is composed of a cylindrical body 2 and a pair of holding bodies 3 and 4 and has an extremely simple configuration, the overhead wire branching jig 1 can be introduced at low cost. Is possible.

In order to install the overhead wire branching jig 1, it is necessary to replace the long member 20 inserted inside the cylindrical body 2 with the existing connecting member 53E. There is no particular difficulty, and it can be easily implemented. Further, since the horizontal frame 22c is provided as the stopper S to prevent the lower edge of the cylindrical body 2 from descending beyond the lower end 20b of the long member 20, the rotation of the cylindrical body 2 may be hindered. The cylindrical body 2 can always rotate stably about the vertical frame 22a.

Then, according to the overhead wire branching jig 1 and the overhead wire branching device 1A, the swing of the branch line 102 and the like is efficiently converted into the integral rotation of the pair of holding bodies 3 and 4 and the cylindrical body 2. Therefore, it is possible to ensure that this fluctuation is absorbed and tension is not applied to the overhead wire 100 at the branch point J.
Further, since electrical continuity is ensured at the end 102d of the cut branch line 102, the disadvantage caused by cutting the branch line 102 can be eliminated.
Further, the pair of holding bodies 3 and 4 can rotate over a wide range until they come into contact with the long member 20, and excessive rotation is prevented, so that the cylindrical body can rotate. Hard to be hindered. Further, since the angle α is 120 degrees, the fastening bolts 7a, 8a and the like can be attached without difficulty, so that the base end side stump 102b and the end end side stump 102c can be easily attached to each pair of holding bodies. It can be attached to 3 and 4.

However, when the pair of holding bodies 3 and 4 rotate to the maximum, a strong tension may be applied to the overhead electric wire 100 via the pair of holding bodies 3 and 4 and the branch line 102. However, even in such a case, the strong tension can be reduced by extending the end telescopic means 9 and the proximal end telescopic means. Therefore, it is possible to prevent the overhead electric wire 100 gripped by the suspension tower from being broken, and to prevent the suspension device 71 suspended from the newly installed tension tower 70 from being damaged.

Next, a long metal fitting provided in the overhead wire branching device according to the first modification of the second embodiment will be described with reference to FIG. FIG. 5 is a side view of a long metal fitting provided in the overhead wire branching device according to the first modification of the second embodiment. The components shown in FIGS. 1 to 4 are designated by the same reference numerals in FIG. 5, and the description thereof will be omitted.
As shown in FIG. 5, the long member 23 included in the overhead wire branching device according to the first modification of the second embodiment has the upper end 20a and the lower end 20b of the long member 20 (see FIGS. 2 and 3). The upper end branch portion 24 and the lower end branch portion 25 that are bifurcated are formed. The upper end branch portion 24 is formed with fixing holes 24a and 24a that communicate with the mounting hole 55a of the lower end 52a when the upper end branch portion 24 sandwiches the lower end 52a of the insulator chain 52. Therefore, the upper end branch portion 24 is fixed to the lower end 52a of the insulator ream 52 by passing the fastening bolt 26a through the fixing holes 24a and 24a and the mounting hole 55a and tightening the nut 26b to the fastening bolt 26a. There is. Further, the lower end branch portion 25 has the same structure as the upper end branch portion 24.
The configuration of the long member 23 other than this is the same as the configuration of the long member 20.

In the long member 23, the upper end branch portion 24 and the lower end branch portion 25 are more firmly fixed to the lower end 52a of the insulator chain 52 and the upper end 54a of the grip body 54 than in the case of the long member 20.
Therefore, according to the long member 23, the durability of the connection between the insulator chain 52 and the grip body 54 can be made good against the swing and wind pressure of the branch line 102 and the like.
The other actions and effects of the long member 23 are the same as those of the long member 20.

Further, a long metal fitting provided in the overhead wire branching device according to the second and third modifications of the second embodiment will be described with reference to FIG. 6 (a) and 6 (b) are side views of a long metal fitting provided in the overhead wire branching device according to the second and third modified examples of the second embodiment, respectively. The components shown in FIGS. 1 to 5 are designated by the same reference numerals in FIG. 6, and the description thereof will be omitted.
As shown in FIG. 6A, in the long member 27 included in the overhead wire branching device according to the second modification of the second embodiment, a part of the base 21 of the long member 20 is a locking portion 22. It is removed between the horizontal frame 22b and the horizontal frame 22c constituting the above. The other configuration of the long member 27 is the same as that of the long member 20, and its action and effect are also the same as those of the long member 20.
As shown in FIG. 6B, the long member 28 included in the overhead wire branching device according to the third modification of the second embodiment is the vertical frame 22a constituting the locking portion 22 of the long member 20. A part of it is removed between the horizontal frame 22b and the horizontal frame 22c. The other configuration of the long member 28 is the same as that of the long member 20, and its action and effect are also the same as those of the long member 20.

Finally, a long metal fitting provided in the overhead wire branching device according to the fourth modification of the embodiment will be described with reference to FIG. 7. FIG. 7 is a side view of a long metal fitting provided in the overhead wire branching device according to the fourth modification of the second embodiment. The components shown in FIGS. 1 to 6 are designated by the same reference numerals in FIG. 7, and the description thereof will be omitted.
As shown in FIG. 7, the connecting member 53 included in the overhead wire branching device according to the fourth modification of the second embodiment has a length longer than that of the cylindrical body 2 in the existing connecting member 53E (see FIG. 9). A stopper S1 is provided to prevent the short cylindrical body 2'from descending in the direction of the gripping body 54 (see FIG. 4). Further, fixing holes 53a and 53b for fixing to the insulator series 52 and the grip body 54 (see FIG. 4) are bored at the upper end and the lower end of the connecting member 53, respectively.
The stopper S1 is an L-shaped metal fitting having one end at a right angle, and the other end penetrates the connecting member 53E and is fixed to the connecting member 53E by a nut 29.
Further, the branch line 102 (see FIG. 4) is not cut at one place between the base end 102a and the end end 102d, and is fixed to the pair of holding bodies 3 and 4 by using the fixing holes 5 and 6, respectively. Will be done. As the fixture in this case, for example, a binding body (not shown) is used.
The configuration of the connecting member 53 other than this is the same as the configuration of the long member 20.

In the connecting member 53 having the above configuration, the cylindrical body 2'rotates around the vicinity of the connecting member 53 while the lower edge thereof is supported by one end forming a right angle of the stopper S1. In order to attach the cylindrical body 2'to the connecting member 53, the upper end or the lower end of the connecting member 53 is once removed from the insulator series 52 and the gripping body 54, respectively, and then the cylindrical body 2'is fitted into the connecting member 53E. , The upper end or the lower end of the connecting member 53 is fixed to the insulator chain 52 and the grip body 54, respectively.
Therefore, the connecting member 53 can be configured only by adding the stopper S1 to the existing connecting member 53E, and as described above, the attachment of the cylindrical body 2'to the connecting member 53 can be completed by a simple procedure. it can.
The other actions and effects of the connecting member 53E are the same as those of the long member 20.

The structures of the overhead wire branching jig 1 and the overhead wire branching device 1A of the present invention are not limited to those shown in the examples. For example, the cylindrical bodies 2 and 2'may be formed by combining a pair of half-split bodies in which one side edge is connected to each other by a hinge so that the other side edge can be opened and closed. Further, the magnitude of the angle α does not have to be exactly 120 degrees mathematically, and is 120 degrees unless the cylindrical body 2 rotates sufficiently and the fixing hole 5 and the fixing hole 6 are too close to each other. It does not have to be limited to. Further, the pair of holding bodies 3 and 4 may be configured to rotate independently of each other along the outer circumference of the cylindrical body 2 as long as they do not intersect with each other.

The present invention provides an overhead electric wire branching jig capable of suppressing tension from being applied to the overhead electric wire gripped by the suspension tower at the branch point when a branch wire is newly branched from the existing overhead electric wire. It can be used as a device for branching overhead electric wires.

1A ... Overhead wire branching device 1 ... Overhead wire branching jig 2,2'... Cylindrical body 3,4 ... Holder 5,6 ... Fixing hole 7a, 8a ... Fastening bolt 9 ... Terminal expansion and contraction means 20 ... Long length Member 20a ... Upper end 20b ... Lower end 21 ... Base 21a, 21b ... Fixing hole 22 ... Locking part 22a ... Vertical frame 22b, 22c ... Horizontal frame 23 ... Long member 24 ... Upper end branch 24a ... Fixing hole 25 ... Lower end Branch part 26a ... Fastening bolt 26b ... Nut 27 ... Long member 28 ... Long member 29 ... Nut 50 ... Suspension device 51 ... Mounting bracket 52 ... Insulator series 52a ... Lower end 53 ... Connecting member 53E ... Connecting member 53a, 53b ... Fixed Hole 54 ... Grip body 54a ... Upper end 55a, 55b ... Mounting hole 56a ... Mounting hole 70 ... Arm 71 ... Suspension device 90 ... Arm 91 ... Strain plate 91a ... Strain insulator 92 ... Strain insulator 93 ... Suspended insulator 100 ... Overhead wire 101 ... Jumper wire 102 ... Branch line 102a ... Base end 102b ... Base end side stump 102c ... Terminal side stump 102d ... Terminal J ... Branch point S, S1 ... Stopper

Claims (5)

It is attached to a suspension device including an insulator chain suspended from the arm of a suspension tower and a grip body connected to the insulator chain via a connecting body and gripping an overhead electric wire.
It is composed of a cylindrical body rotatably attached to the connecting body about the connecting body and a pair of holding bodies provided on the outer periphery of the cylindrical body at an angle to each other.
The pair of holding bodies are arranged in the middle of the base end and the end of the branch line branched from the overhead electric wire, and hold the branch line. The overhead wire branching jig according to claim 1, wherein the size of the angle is 120 degrees. The jig for branching an overhead electric wire according to claim 1 or 2 is provided.
The connecting body is a long member that is longer than the connecting member existing in the suspension device.
The elongated member comprises a substrate and a locking portion provided along the longitudinal direction of the substrate.
The locking portion includes a stopper that rotatably attaches the cylindrical body around the locking portion and prevents the cylindrical body from descending toward the gripping body.
This stopper is a device for branching an overhead electric wire, which comprises a part of the locking portion near the grip body. The cylinder and the pair of holders are both made of a conductive material.
At the base end and the end, one place between them is cut to form a base end side stump and a terminal side stump, respectively.
The overhead wire branching device according to claim 3, wherein the base end side stump and the terminal end side stump are fixed to one and the other of the pair of holding bodies, respectively, via a fastening member. At least one of a base end telescopic means and an end telescopic means is provided,
The base end telescopic means is interposed between the base end and the overhead electric wire.
The overhead wire branching device according to claim 3 or 4, wherein the terminal telescopic means is interposed between the terminal and a new suspension device suspended from an arm of a newly installed tension tower.

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