Kamares construction method connecting fittings and Kamares construction method using the same

Abstract

To provide a coupling metal fitting for a come-alongless method and a come-alongless method using the same in which the coupling metal fitting (link) of an improved type having wire tensioning (slackness adjustment) work and double-protection functions is used for an insulator device so that contributions can be made to workability improvement which is obtained by significant reduction in worker's manpower and safety improvement which is obtained by significant reduction of a risk of falling of a worker, and a tool and the like.SOLUTION: Provided are a coupling metal fitting for a come-alongless method, and a come-alongless method using the same. The coupling metal fitting for a come-alongless method is for use in wire tensioning work of an electric wire that is disposed between steel towers, and in double-protecting work that is performed during the wire tensioning, and the coupling metal fitting is connected between a clevis or clamp disposed on the electric wire side and a vernier fitting or clevis disposed on a steel tower side, and the coupling metal fitting includes a protection hole for the double-protection work provided at least at one point other than a hole for tensioning the wire to be coupled, By the come-alongless method, the wire tensioning work and the double-protection work during the wire tensioning work are performed at the same time.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a connecting fitting for the Kamarez method and the Kamarez method using the same. More specifically, by using an improved connecting fitting (link) having a wire tensioning (sag adjustment) operation and a double protection function in the insulator device, it is possible to contribute to an improvement in workability by significantly reducing the labor of workers, and an improvement in safety by significantly reducing the risk of falling of tools. The present invention relates to a connecting fitting for the Kamarez method and the Kamarez method using the same.

[0002] In this specification, "wire extension" is an operation in which a section of several kilometers between transmission line towers (hereinafter referred to as "towers") is defined as one wire extension section, and the wire is extended by a winch via a pulley attached to the tower to perform wire stringing. "Wire tensioning" is an operation for adjusting the sag (degree of slack) of the extended wire to a value determined in advance by design. In this specification, "cam along" is a tool for gripping and temporarily holding a wire under tension during wire extension and wire tensioning.

Background Art

[0003] Conventional wire tensioning (sag adjustment) operations are shown in FIGS. 5 and 6. FIG. 5 shows a conventional method in which a wire tensioning tool (2) is connected to an insulator device to take in a wire during a wire tensioning (sag adjustment) operation. In a conventional wire tensioning (sag adjustment) operation, in order to prevent an accident in which the wire falls due to the disconnection of the wire tensioning tool (2) connected to the insulator device during the wire tensioning operation or the wire coming out of the wire gripping part (clamp), the worker leans out over the span wire to attach a cam along and performs double protection. Figure 6 shows a conventional method of securing electric wires during tensioning (sag adjustment) work by connecting a tensioning link (4) (clevis) attached to a tensioning fitting (3) to the insulator device. Compared to the method in Figure 5, the method in Figure 6 does not require a separate tensioning tool (2), and therefore the installation and removal of the tensioning tool (2) is unnecessary. However, when performing double protection, workers had to lean over the span electric wires to install and remove the cam-along, just as in the method in Figure 5.

[0004] Patent Document 1 discloses a method for facilitating the connection of a kamaless fitting attached to a tension clamp and a parallel clevis attached to a vernier fitting during the tensioning work of extended electric wires, as well as a kamaless fitting used therein. However, the wire tensioning method disclosed in Patent Document 1 is a method in which a wire tensioning tool is connected to a wire tensioning fitting, as in the conventional method, and therefore a lot of time is required for attaching and detaching the tool during wire tensioning.

[0005] Furthermore, since overhead power line installation work primarily involves working at heights of over 100 meters above the ground, ensuring the safety of workers is crucial. However, because the work involves handling heavy objects at high places with unstable footing, such as on top of transmission towers, or in unstable positions leaning over the power lines between towers, there is a high risk of accidents involving falling workers or tools. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2008-125208 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] The present invention aims to solve the problems of the conventional technology described above by using an improved connecting fitting (link) for the insulator device that has the functions of tensioning (sag adjustment) work and double protection. This eliminates the need for tensioning tools and their installation work, as well as the installation work of cam-alongs on spandrels, which were required during conventional tensioning work. As a result, it contributes to improved workability by significantly reducing the labor of workers and improved safety by significantly reducing the risk of tools falling. The present invention provides a connecting fitting for the cam-along method and a cam-along method using the same. [Means for solving the problem]

[0008] The invention according to claim 1 is a connecting fitting for the Kamares method used for tensioning electric wires installed between transmission towers, and for double protection work during said tensioning, The present invention relates to a connecting fitting for the Kamares construction method, characterized in that the connecting fitting is connected between a clevis or clamp on the electric wire side and a vernier fitting or clevis on the tower side, and that the connecting fitting is provided with protective holes for double protection work in at least one location other than the tensioning hole to which it is connected.

[0009] The invention according to claim 2 relates to the Kamares construction method connecting fitting according to claim 1, wherein the Kamares construction method connecting fitting is rectangular, triangular, or fan-shaped in plan view.

[0010] The invention according to claim 3 relates to the Kamares construction method connecting fitting described in claim 1, wherein the material of the Kamares construction method connecting fitting is rolled steel.

[0011] The invention according to claim 4 relates to the Kamares construction method connecting fitting according to claim 2, wherein the material of the Kamares construction method connecting fitting is rolled steel.

[0012] The invention according to claim 5 relates to a method for tightening electric wires extended between transmission towers using a connecting fitting for the Kamares method described in any one of claims 1 to 4, wherein the connecting fitting is used to simultaneously perform the tightening work and double protection during the tightening work. [Effects of the Invention]

[0013] According to the invention of claim 1, the connecting fitting for the Kamares construction method according to the present invention is connected between a clevis or clamp on the electric wire side and a vernier fitting or clevis on the tower side, and the connecting fitting is characterized in that it is provided with protective holes for double protection work in at least one place other than the tensioning hole to which it is connected. As a result, two types of work, tensioning (sag adjustment) and double protection, can be performed simultaneously with a single fitting, eliminating the need to install and remove cam-alongs for double protection, thereby significantly reducing the labor of workers and improving workability and safety.

[0014] According to the invention of claim 2, the connecting fitting for the Kamares construction method is rectangular, triangular, or fan-shaped in plan view, so the orientation of the fitting can be changed to suit the site environment and other conditions when performing the tensioning work, or the shape can be selected to match the fitting to be connected, allowing for flexible response to tensioning work under all conditions.

[0015] According to the inventions of claims 3 and 4, the material of the connecting fittings for the Kamares construction method is rolled steel and is a steel plate product, so it is easier to manufacture compared to conventionally used forged and cast connecting fittings, and the specifications can be easily changed according to the application, such as changing the shape of the connecting fittings to match the tools used according to the conditions when performing tensioning work.

[0016] According to the invention of claim 5, in wire tensioning (sag adjustment) work, two types of work, wire tensioning (sag adjustment) and double protection, can be performed simultaneously with a single fitting, thereby improving work efficiency by significantly reducing the labor required by workers. Furthermore, since there is no need to attach and detach the cam-along for double protection, and workers do not need to lean over the wires to work, the risk of workers and tools falling is significantly reduced, thereby improving safety during wire tensioning work. [Brief explanation of the drawing]

[0017] [Figure 1] Side view of the entire insulator device when using the connecting fitting for the Kamales method according to the present invention. [Figure 2] Plan view showing an embodiment (quadrilateral in plan view) of the connecting fitting for the Kamales method according to the present invention. [Figure 3] Side view showing a part of the insulator device when using the connecting fitting for the Kamales method according to the present invention. (a) shows an embodiment of the connecting fitting for the Kamales method with a quadrilateral shape in plan view, (b) shows a triangular shape, and (c) shows a fan-shaped embodiment. [Figure 4] Side view showing a part of the insulator device when using the connecting fitting for the Kamales method according to the present invention. (a) shows an embodiment of the connecting fitting for the Kamales method with a quadrilateral shape in plan view, (b) shows a triangular shape, and (c) shows a fan-shaped embodiment, and it is a side view of the connecting fitting for the Kamales method in FIG. 3 with construction holes added. [Figure 5] Side view showing a conventional method of connecting a tensioning tool to an insulator device and taking in an electric wire during a tensioning (sag adjustment) operation. [Figure 6] Side view showing a conventional method of connecting a tensioning link (clevis) attached to a tensioning fitting to an insulator device and taking in an electric wire during a tensioning (sag adjustment) operation.

Mode for Carrying Out the Invention

[0018] Hereinafter, an embodiment of the connecting fitting for the Kamales method according to the present invention and a tensioning method using the same will be described with reference to the drawings.

[0019] An example of the connecting fitting for the Kamales method according to the present invention will be described. Note that the method described in detail below is an example and is not limited thereto. In the following example, a tensioning operation is performed using the connecting fitting (1) for the Kamales method having a quadrilateral shape in plan view according to the present invention, but it is not limited thereto. The connecting fitting (1) for the Kamales method that can perform the following steps may be used, and any one may be used as long as it is obvious to those skilled in the art.

[0020] Figure 1 is a side view of the entire insulator device when using the connecting fitting (1) for the Kamares construction method according to the present invention. As shown in Figure 1, when performing tensioning (sag adjustment) work, the tensioning hole (9) of the connecting fitting (1) for the Kamares method is connected to the clevis (6) or clamp (not shown) on the power line side, and to the vernier fitting (7) or clevis connecting part on the tower side. Furthermore, during tensioning (sag adjustment) work, it is possible to perform double protection simultaneously by connecting the protective hole (10) with the double protection anchoring point of the transmission tower. By using the Kamares construction method connecting fitting (1) according to the present invention, which has functions such as tensioning (sag adjustment) work and double protection, the installation and removal work of the tensioning tool (2) used in the conventional construction method shown in Figures 5 and 6 becomes unnecessary, and the need to attach a cam-along (5) to the spandex wire for double protection is eliminated, thereby significantly reducing the labor of workers and improving workability and safety.

[0021] In an insulator device using the connecting fitting (1) for the Kamares construction method according to the present invention, the holes (13) for taking in the double tension fixing yoke (12) are provided not only at the conventional 70 mm intervals, but also at the same interval as the conductor spacing (400 mm, etc.). As a result, the spacing of the intake holes (13) of the double tension fixing yoke (12) is the same as the spacing between conductors, which makes it possible to avoid the proximity of pulleys, etc., when two multi-conductor wires are taken in simultaneously, and to take in each wire on the axis.

[0022] Figure 2 shows a connecting fitting (1) for the Kamares construction method, which is a rectangular shape in plan view and is one embodiment of the present invention. The Kamares construction method using the connecting fitting (1) for the Kamares construction method according to the present invention is a method of taking in electric wires using tensioning holes (9), similar to the conventional method shown in Figure 6. However, compared to the forged and cast products used in the conventional method, the connecting fitting (1) for the Kamares construction method according to the present invention is made of steel plate, so it is easy to manufacture and there is room for improvement such as adding construction holes (11).

[0023] While it is preferable to use steel plates such as rolled steel for the connecting fitting (1) for the Kamares construction method according to the present invention, any material can be used as long as it is used in the tensioning work of electric wires, has good manufacturability, and is obvious to those skilled in the art.

[0024] Figure 3 shows a part of an insulator device when using the connecting fitting (1) for the Kamares construction method according to the present invention. As one embodiment, (a) shows a rectangular shape in plan view, (b) shows a triangular shape, and (c) shows a fan shape for the connecting fitting (1) for the Kamares construction method. As shown in Figure 3(a), the connecting fitting (1) for the Kamares construction method may be used in reverse from Figure 1.

[0025] Figure 4 shows the Kamares construction method connecting fitting (1) from Figure 3 with the addition of a construction hole (11). As one embodiment, similar to Figure 3, (a) shows a rectangular shape in plan view, (b) shows a triangular shape, and (c) shows a fan shape for the Kamares construction method connecting fitting (1).

[0026] The connecting fitting (1) for the Kamares construction method according to the present invention is made of a steel plate product with good manufacturability. Therefore, it is possible to change the specifications according to the application, such as changing the direction of connection or changing the shape to match the hole diameter of the tensioning tool (2) used, in accordance with the site conditions where the tensioning (sag adjustment) work is performed. This makes it possible to flexibly respond to tensioning work under all conditions.

[0027] Figures 5 and 6 are side views of the entire insulator device when a tensioning tool (2) is connected to a conventional tensioning fitting (3) to perform tensioning (sag adjustment) work. In conventional wire tensioning (sag adjustment) work, wire tensioning fittings (3) and wire tensioning tools (2) were used to pull in the wires, and the cam-along (5) was attached to the wires between the spans, providing double protection (8) to prevent accidents. Figure 5 shows a conventional method of securing electric wires by connecting a tensioning tool (2) to the insulator device during tensioning (sag adjustment) work.

[0028] Conventional wire tensioning (sag adjustment) work was inefficient and time-consuming because it required the installation and removal of wire tensioning tools (2) and cam-alongs (5). In tensioning (sag adjustment) work using the connecting fitting (1) for the Kamares construction method according to the present invention, for example, when installing tension devices for four conductors on both circuits, since 12 tension devices for four conductors are installed on one tower, the installation and removal work of 48 cam-alongs (5) can be omitted. This significantly reduces the labor required by workers and improves workability and safety.

[0029] Figure 6 shows a conventional method of securing electric wires during tensioning (sag adjustment) work by connecting a Y-shaped fitting (tensioning link) (4) attached to a tensioning fitting (3) to the insulator device. Although the tensioning tool (2) can be omitted compared to the method in Figure 5 because the electric wire can be connected to the Y-shaped fitting (tensioning link) (4), in both methods, when performing double protection (8), workers need to lean over the span electric wires to install or remove the cam-along (5).

[0030] In the double protection for accident prevention (8), the installation and removal of the cam-along (5) can be completely eliminated, making complete cam-less operation possible. By completely eliminating the need for a cam, it is possible to improve work efficiency by significantly reducing the labor required by workers, and to improve safety by significantly reducing the risk of workers and tools falling. [Examples]

[0031] [Comparison of working time between conventional methods and the tensioning method using the connecting fittings for the Kamares method according to the present invention] The average working time (minutes) for each step in the tensioning method using the connecting fittings for the Kamares method according to the present invention was compared with the working time required for the conventional tensioning method.

[0032] Conventional wire tensioning methods, in addition to the steps of the wire tensioning method according to the present invention, include additional steps necessary for double protection work, such as connecting wire tensioning tools and the installation and removal of cam-alongs.

[0033] Table 1 compares the average time required for the tensioning method according to the present invention with the time required for the conventional tensioning method.

[0034] [Table 1]

[0035] As shown in Table 1, the total working time (in minutes) required for the tensioning method according to the present invention was reduced by approximately 100 minutes compared to the conventional method. These results clearly demonstrate that the constructability of the tensioning method according to the present invention is significantly improved compared to conventional methods. [Industrial applicability]

[0036] The Kamares construction method connecting fitting according to the present invention and the Kamares construction method using the same contribute to improved workability by significantly reducing the labor required by workers and improved safety by significantly reducing the risk of tools falling, by using an improved connecting fitting (link) that has the functions of tensioning (sag adjustment) work and double protection in the insulator device. Therefore, the connecting fitting for the Kamares construction method according to the present invention and the Kamares construction method using the same can be suitably used for tensioning work between transmission towers. [Explanation of Symbols]

[0037] 1. Connecting fittings for the Kamares construction method 2 Tensioning tools 3. Tensioning hardware 4. Y-shaped fitting (tension link) 5 Come Along 6 Clevis 7 Vernier fittings 8 Double protection 9 Strain hole 10 Protective hole 11. Construction holes 12. Double tension fixing yoke 13 Intake holes

Claims

1. A connecting fitting for the Kamares method used for tensioning electric wires installed between transmission towers, and for double protection work during said tensioning, The connecting fitting is connected between a clevis or clamp on the electric wire side and a vernier fitting or clevis on the tower side, and the connecting fitting is characterized in that it is provided with protective holes for double protection work in at least one location other than the tensioning hole to which it is connected.

2. The Kamares construction method connecting fitting described above is rectangular, triangular, or fan-shaped in plan view, as described in claim 1.

3. The connecting fitting for the Kamares construction method according to claim 1, wherein the material of the connecting fitting for the Kamares construction method is rolled steel.

4. The connecting fitting for the Kamares construction method according to claim 2, wherein the material of the connecting fitting for the Kamares construction method is rolled steel.

5. A method for tightening electric wires extended between transmission towers using a connecting fitting for the Kamares method described in any one of claims 1 to 4, wherein the Kamares method simultaneously performs the tightening work and double protection during the tightening work using the connecting fitting.

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