JP6794267B2 - Arm repair method and arm repair device - Google Patents

Description

The present invention relates to an arm metal repair method and an arm metal repair device for repairing an arm metal made of an angle material.

The electricity generated at the power plant of an electric power company is transmitted over a long distance through a transmission line stretched (supported) on a power transmission tower constructed on the ground (hereinafter, simply referred to as a steel tower), and is transformed at the substation. After being supplied to consumers. For example, as in Patent Document 1, in a steel tower, an arm extending in the horizontal direction is provided on the upper part of the main pillar material, and a power transmission line is stretched on the arm.

Since the arm metal deteriorates due to corrosion etc., it needs to be repaired after a certain number of years (period). In Patent Document 1, a hooking member is fixed to the tip of the main arm metal material, and a wire is hung between the hooking member and the tower body (main pillar material) of the steel tower. Then, the tension of the wire is adjusted by manually adjusting the tension adjusting device provided on the wire, and the arm metal is repaired. According to Patent Document 1, since the load applied to the arm from the transmission line can be received by the tower body of the steel tower via the wire, the arm constituting the arm without temporarily transferring the transmission line. It is said that the tip plate and arm hanging material can be replaced.

The purpose of Patent Document 1 is to replace the arm metal tip plate and the arm metal hanging member which are joined in the vertical surface of the arm metal. Therefore, among the loads applied to the arm metal from the transmission line as in Patent Document 1, the load in the vertical direction is applied to the arm metal tip plate and the arm metal suspension material by receiving the vertical load on the tower body of the steel tower. It is mitigated and the bolts that secure them can be preferably removed.

Japanese Unexamined Patent Publication No. 2012-251318

Here, the arm metal may be provided with an auxiliary material for connecting the two arm metal main materials (hereinafter, simply referred to as main materials) facing each other as in Patent Document 1. The main material is subjected to an outward load due to the tension of the transmission line, that is, a load pulled toward the transmission line side. Therefore, strong tension is applied to the two main materials in the direction in which the distance between the two main materials increases, and an outward load (shear stress) is also applied to the bolts used for fixing the auxiliary material and the main material.

However, according to the technique of Patent Document 1, although the load in the vertical direction applied to the arm metal can be reduced, the load toward the outside due to the tension of the electric wire cannot be reduced. Therefore, even if the technique of Patent Document 1 is applied, the labor required for the replacement work of the auxiliary material for connecting the two main materials cannot be reduced, and there is still room for improvement.

Further, Patent Document 1 states that a tension adjusting device (ratchet mechanism) is provided on the wire to manually adjust the tension. However, when a wire is hung on the main material of L-shaped steel and pulled, there is a problem that a rotational moment is generated in the main material, which causes twisting. Furthermore, since the arm has a tubular truss structure and the brace material is appropriately installed inside the arm, there is no space for installing the tension adjusting device, and in order to operate the lever of the ratchet mechanism. It is difficult to take up space for workers. In addition, the width of the arm is narrow, and the distance between the two main materials is not sufficient to install a wire tension adjusting device. That is, the configuration in which the two main materials are pulled by a wire causes twisting, which makes it difficult to install the device and to operate the device.

In view of such a problem, the present invention makes it possible to further simplify the repair work of the arm metal by facilitating the replacement of the auxiliary material connecting the two main materials in the arm metal, and the work load. It is an object of the present invention to provide an arm metal repair method and an arm metal repair device capable of alleviating the problem.

In order to solve the above problems, a typical configuration of the arm metal repair method according to the present invention is an arm metal repair method for repairing an arm metal made of an angle material, and the arm metal retains an electric wire 2 It is composed of a main material of a book and an auxiliary material that connects the two main materials, and a jig with bolt holes is attached to each of the two main materials, and a joint with threads at the ends. Connect the bolt holes of the two jigs, tighten the screws at the end of the joint from the outside of the jig with nuts to urge the main material inward, and apply the tension of the electric wire to the bolts that fix the auxiliary material. It is characterized by replacing the auxiliary material in a relaxed state.

According to the above configuration, the bolt holes of the jig attached to the arm are connected by a joint, and the screw at the end of the joint is tightened with a nut so that the two main materials face each other inward, that is, face each other. It is urged toward the main material. As a result, the load on the main material that is applied outward due to the tension of the electric wire is received by the jig and the joint, so that the tension applied to the bolt that fixes the auxiliary material is relaxed and the two main materials are relaxed. The auxiliary material connecting the two can be easily removed. The advantage of the present invention is that the work proceeds on the outside of the arm having a tubular truss structure. The jig is attached to the outside of the main material. Although the joint is passed through the arm, the work of tightening the joint is done outside the arm. Therefore, no space is required to install the device inside the arm, and no space is required in the arm for the work for tightening. Therefore, the arm metal repair work can be performed more easily, and the work load can be reduced.

The jig may be attached to both the upper surface and the lower surface of the main material, and may urge the main material inward on both the upper side and the lower side of the main material. According to such a configuration, since the main material is urged inward on both the upper side and the lower side, the tension can be relaxed without giving a rotational moment to the main material. Therefore, the replacement work of the auxiliary material can be performed more efficiently.

The jig may have a floor plate fixed to the main material, a standing plate having bolt holes to which a joint is connected, and a triangular plate connecting the floor plate and the standing plate. According to such a configuration, since the triangular plate functions as a brace material, it is possible to receive a large load. The jig has a simple structure including a floor plate, a standing plate, and a triangular plate connecting them. Therefore, the jig can be easily handled and the cost of the jig can be reduced.

It is preferable that the joint is equipped with a tension gauge that displays the tension applied to the joint. This makes it possible for the worker to easily and accurately grasp the tension applied to the joint.

In order to solve the above problems, a typical configuration of the arm metal repair device according to the present invention is an arm metal repair device for repairing an arm metal made of an angle material, and the arm metal holds an electric wire 2 It is composed of a main material of a book and an auxiliary material that connects the two main materials, and has a pair of jigs that have bolt holes and are attached to each of the two main materials, and a screw is cut at the end. It is characterized by including a joint for connecting bolt holes of a pair of jigs and a nut for being fastened to a screw at an end of the joint from the outside of the jig. The components and explanations corresponding to the technical idea in the above-mentioned arm repair method can also be applied to the arm repair device.

According to the present invention, the repair work of the arm can be further simplified by facilitating the replacement of the auxiliary material connecting the two main materials in the arm, and the work load can be reduced. A possible arm repair method and arm repair device can be provided.

It is a figure which illustrates the steel tower which performs the repair work by applying the arm metal repair method which concerns on this embodiment. It is a detailed view of the arm metal of FIG. The arm metal repair device according to this embodiment will be described. It is a perspective view of the jig shown in FIG. It is a figure explaining the arm metal repair method of this embodiment. It is a figure explaining the arm metal repair method of this embodiment.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in such an embodiment are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are designated by the same reference numerals to omit duplicate description, and elements not directly related to the present invention are not shown. To do.

(Pylon)
FIG. 1 is a diagram illustrating a steel tower 200 for performing repair work by applying the arm metal repair method according to the present embodiment. As shown in FIG. 1, the main body portion 200a of the steel tower 200 is formed by connecting a plurality of main landing gears 210a and 210b extending upward by auxiliary bars 212. An arm 220 is provided on the upper portion of the main body 200a, and an electric wire 202 (transmission line) is supported by the arm 220.

(Arm)
FIG. 2 is a detailed view of the arm metal 220 of FIG. The arm has a tubular truss structure, which was observed from the front in FIG. 1, but FIG. 2 (a) is a view of the arm 220 observed from above. FIG. 2B is an enlarged view of a portion (inside the broken square line in FIG. 2A) holding the electric wire 202 at the tip of the arm 220. Since the electric wire 202 is fastened to the bottom surface of the arm metal, the side surface and the top surface of the arm metal are omitted in FIG. 2 (b).

As shown in FIG. 2A, the arm metal 220 is configured to include main members 222a and 222b made of angle members and auxiliary members 224. The main materials 222a and 222b are members extending in a direction intersecting the laying direction of the electric wire 202, and the auxiliary material 224 is arranged between the two main materials 222a and 222b. The auxiliary material 224 will be described in detail later.

A plate is attached to the lower side of the main materials 222a and 222b. Specifically, as shown in FIG. 2B, three plates 226a, 226b, and 226c are attached to the lower side of one main material 222a, and also to the lower side of the other main material 222b. Similarly, three plates 226d, 226e, and 226f are attached.

The electric wires 202 are connected to the outer regions of the plates 226a to 226f when the auxiliary material 224 side (the side between the two main materials 222a and 222b) is on the inner side. As a result, the electric wire 202 is fastened (supported) to the main materials 222a and 222b via the plates 226a to 226f. Further, in the present embodiment, one plate 226g is further arranged near the center of the plurality of plates 226a to 226f attached to the lower side of the main materials 222a and 222b.

Auxiliary material is fixed to the inner region of the plates 226a to 226f and 226g arranged in the center. Specifically, as shown in FIG. 2B, the auxiliary material 224a is fixed to the plates 226a and 226d, and the auxiliary material 224b is fixed to the plates 226c and 226f. The auxiliary material 224c is fixed to the plates 226a, 226f, and 226g. As a result, the two main materials 222a and 222b are connected by the auxiliary materials 224a to 224c attached to the plates 226a to 226g. Further, in the present embodiment, the other ends of the four auxiliary materials 224d, 224e, 224f, and 224g whose one end is fixed to the plate 226g are fixed to the plates 226b, 226e, 226c, and 226d, respectively. As a result, the two main materials 222a and 222b can be more firmly connected.

(Arm repair device)
FIG. 3 illustrates the arm metal repair device 100 according to the present embodiment. FIG. 4 is a perspective view of the jig 110a shown in FIG. Although the arm 220 is not included in the arm repair device 100, the arm 220 is shown in FIG. 3 for easy understanding.

As shown in FIG. 3, the arm metal repair device 100 of the present embodiment includes two pair of jigs 110a / 110b, a joint 120, and nuts 130a / 130b. As shown in FIG. 4, the jig 110a includes a floor plate 112, a standing plate 114, and a triangular plate 116a / 116b.

The floor plate 112 is a portion fixed to the main material 222a, and the standing plate 114 stands upward from the end portion thereof. The floor plate 112 is formed with bolt holes 112a and 112b for attaching bolts when fixing the floor plate 112 to the main material. The standing plate 114 has a bolt hole 114a into which an end portion (screw portion described later) of the joint 120 is inserted. The floor plate 112 and the standing plate 114 are connected by triangular plates 116a and 116b.

Since the jig 110a has a structure including the floor plate 112, the standing plate 114, and the triangular plates 116a / 116b as in the present embodiment, the triangular plates 116a / 116b function as a brace material, so that a large load can be received. It is possible. Further, since the jig 110a has a simple structure, the jig 110a can be easily handled and the cost of the jig 110a can be reduced. Since the pair of jigs 110a and 110b have the same configuration, the description of the jig 110b will be omitted.

As shown in FIG. 3, the joint 120 of the present embodiment includes two threaded portions 122a and 122b constituting the end portion thereof, a connecting portion 124 connecting them, and a tension gauge 126 arranged at the connecting portion. It is composed. The tension gauge 126 measures and displays the tension applied to the joint 120. As a result, the worker can easily and accurately grasp the tension applied to the joint.

(Arm repair method)
FIG. 5 is a diagram for explaining the arm metal repair method of the present embodiment, and illustrates a state in which the main materials 222a and 222b are observed from the side. In the arm metal repair method according to the present embodiment, the main materials 222a and 222b and the auxiliary materials 224a and 224g, which are the angle materials constituting the arm metal 220 shown in FIG. 2, are arranged between the two main materials 222a and 222b. The case where the auxiliary material 224a is replaced is illustrated. Further, FIGS. 3 and 5 illustrate a configuration in which the arm metal repair device 100 is attached to both the upper side and the lower side of the main materials 222a and 222b, but since the attachment method is common to the upper side and the lower side, the upper side is used. The procedure for mounting on the device will be described as an example.

In the arm metal repair method of the present embodiment, first, as shown in FIG. 5A, a pair of jigs 110a and 110b are attached to each of the two main materials 222a and 222b. When the jigs 110a and 110b are attached to the main materials 222a and 222b, the bolt holes (not shown) formed in the main materials 222a and 222b and the bolt holes 112a formed in the floor plate 112 of the jigs 110a and 110b. -Align 112b and fix them with bolts 102.

After attaching the jigs 110a and 110b to each of the two main materials 222a and 222b, the two jigs 110a and 110b (strictly speaking, the bolt holes 114a of the standing plate 114) are connected by the joint 120. Specifically, as shown in FIG. 5B, when connecting the bolt holes 114a of the jigs 110a and 110b, the screw portions 122a and 122b, which are the ends of the joint 120, are connected to the two jigs 110a and 110b. Insert each into the bolt holes 114a of. As a result, the two jigs 110a and 110b facing each other are connected via the joint 120.

Next, as shown in FIG. 5C, the nuts 130a / 130b are fastened to the threaded portions 122a / 122b at the end of the joint 120 from the outside of the jigs 110a / 110b. By tightening the nuts 130a and 130b to the screw portions 122a and 122b, the main materials 222a and 222b are urged inward as shown by arrows in FIG. 5 (c).

FIG. 6 is a diagram for explaining the arm metal repair method of the present embodiment, and illustrates a state in which the main materials 222a and 222b are observed from above. As described above, when the nuts 130a and 130b are tightened from the outside of the main materials 222a and 222b to the screw portions 122a and 122b, the nuts 130a and 130b are applied outward by the tension of the electric wire 202 as shown by the arrow in FIG. 6A. Since the load P1 of the main materials 222a and 222b is offset by the force P2 urged inward by the joint 120, the tension of the electric wire 202 on the bolt fixing the auxiliary material 224a is relaxed. In this state, the bolts 104 and 204 fixing the auxiliary material 224a to the plates 226a and 226d are removed, and as shown in FIG. 6B, the auxiliary material 224a is removed and replaced with a new auxiliary material.

As described above, in the arm metal repair method of the present embodiment, the bolt holes 114a of the jigs 110a and 110b attached to the main materials 222a and 222b of the arm metal 220 are connected by the joint 120, and the end portion of the joint 120 is connected. By tightening the screws (screw portions 122a and 122b) with the nuts 130a and 130b, the main materials 222a and 222b are urged inward. As a result, the tension of the electric wire 202 applied to the bolt fixing the auxiliary material 224 can be relaxed, and the bolt can be easily removed. Therefore, the labor required for the replacement work of the auxiliary material 224 and the repair work of the arm 220 can be significantly reduced, and the repair work can be easily performed.

In particular, in the present embodiment, the work of tightening the nuts 130a / 130b to the screws (screw portions 122a / 122b) is performed from the outside of the main materials 222a / 222b. Therefore, even in a site where the space between the main members 222a and 222b of the arm 220 is narrow and it is difficult for workers to enter, the arm 220 can be repaired satisfactorily.

Further, in the present embodiment, as shown in FIG. 5 (a), the jigs 110a and 110b are attached to the lower surface of the plates 226a and 226d so as to be attached to the lower surface of the main materials 222a and 222b as shown in FIG. Is also equipped with an arm repair device 100. As a result, the jigs 110a / 110b and thus the arm metal repair device 100 are attached to both the upper surface and the lower surface of the main materials 222a / 222b, and the main materials 222a / 222b are urged inward on both the upper side and the lower side. To. Therefore, the tension of the electric wire 202 can be relaxed without giving a rotational moment to the main materials 222a and 222b, and the auxiliary material 224 can be replaced more efficiently.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood.

The present invention can be used as an arm metal repair method and an arm metal repair device for repairing an arm metal made of an angle material.

100 ... Arm repair device, 102 ... Bolt, 110a ... Jig, 110b ... Jig, 112 ... Floor plate, 112a ... Bolt hole, 112b ... Bolt hole, 114 ... Stand plate, 114a ... Bolt hole, 116a ... Triangular plate, 116b ... Triangular plate, 120 ... Joint, 122a ... Screw part, 122b ... Screw part, 124 ... Connecting part, 126 ... Tension meter, 130a ... Nut, 130b ... Nut, 200 ... Bolt, 200a ... Main body part, 202 ... Electric wire, 210a ... Main leg material, 210b ... Main leg material, 212 ... Auxiliary muscle, 220 ... Arm, 222a ... Main material, 222b ... Main material, 224 ... Auxiliary material, 224a ... Auxiliary material, 224b ... Auxiliary material, 224c ... Auxiliary material, 224d ... Auxiliary material, 224e ... Auxiliary material, 224f ... Auxiliary material, 224g ... Auxiliary material, 226a ... Plate, 226b ... Plate, 226c ... Plate, 226d ... Plate, 226e ... Plate, 226f ... Plate, 226g ... Plate

Claims (5)

It is an arm metal repair method that repairs an arm metal made of angle material.
The arm is composed of two main materials for retaining electric wires and an auxiliary material for connecting the two main materials.
Attach a jig with bolt holes to each of the two main materials,
Connect the bolt holes of the two jigs with a joint threaded at the end.
From the outside of the jig, tighten the screw at the end of the joint with a nut to urge the main material inward.
A method for repairing an arm, which comprises replacing the auxiliary material in a state where the tension of the electric wire applied to the bolt for fixing the auxiliary material is relaxed. The jig is attached to both the top and bottom surfaces of the main material.
The arm repair method according to claim 1, wherein the main material is urged inward on both the upper side and the lower side of the main material. The jig is
The floor board fixed to the main material and
A standing plate having the bolt holes and to which the joint is connected,
A triangular plate that connects the floor plate and the standing plate,
The arm metal repair method according to claim 1 or 2, wherein the arm is repaired. The arm metal repair method according to any one of claims 1 to 3, wherein a tension gauge for displaying the tension applied to the joint is attached to the joint. It is an arm repair device that repairs the arm made of angle material.
The arm is composed of two main materials for retaining electric wires and an auxiliary material for connecting the two main materials.
A pair of jigs that have bolt holes and are attached to each of the two main materials,
A joint that is threaded at the end to connect the bolt holes of the pair of jigs,
A nut tightened from the outside of the jig to the screw at the end of the joint,
An arm repair device characterized by being equipped with.

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