JP2019009926A - Bypass added line cutting tool in middle of span, and construction method therefor - Google Patents

Abstract

To provide a wire cutting tool which is capable of attaching a new wire to an electric pole while effectively utilizing a former wire in wire cutting construction and of which the durability is high.SOLUTION: A wire cutting tool 1 comprises a first wire holding part 2A, a second wire holding part 2B, an elongating/contractable first support rod 3, an elongating/contracting second support rod 4, a bent part 5, and an elongating/contracting operating part 6. The two wire holding parts 2 are capable of holding a wire 20. The first support rod 3 is disposed between the two wire holding parts 2 and attached to the first wire holding part 2A. The second support rod 4 is disposed between the two wire holding parts 2 and attached to the second wire holding part 2B. The bent part 5 couples the first support rod 3 and the second support rod 4 and is capable of changing an angle that is formed from the first support rod 3 and the second support rod 4. The elongation/contraction operating part 6 is attached to the first wire holding part 2A or the second wire holding part 2B and elongates/contracts at least one of the first support rod 3 and the second support rod 4.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an electric wire cutting tool in the middle of a span and a cutting method thereof.

  When it is necessary to rebuild the power pole due to aging, the conventional method is to switch the route after attaching a new wire to the new power pole, and then to remove all the existing wires attached to the old power pole, or to bypass the existing wire. In addition, a new electric wire (hereinafter referred to as “addition line”) is attached only to a part of the section, and then the existing electric wire that is no longer necessary is removed. When carrying out construction with additional lines, in order to maintain the tension of the electric wires related to the bypass route, install a wire tensioner in the middle of the span, attach gripping devices on both sides of the wire, and pass the bypass wire through the section. Therefore, the construction is being performed in a state where the tension of the electric wire is maintained while being energized.

  As a tool for maintaining the tension | tensile_strength of an electric wire, it is disclosed by patent 3415370 (patent document 1) and Unexamined-Japanese-Patent No. 8-331723 (patent document 2), for example.

  The electric wire cutting tool described in Patent Document 1 includes two electric wire gripping portions, a support rod, and a parallel movement link mechanism. By operating the parallel link mechanism in the state where the electric wire cutting tool is held between the spans, the tension of the electric wire being held can be increased or decreased. Thereby, it is described in Patent Document 1 that the work efficiency of electric wire separation is improved.

Japanese Patent No. 3415370 JP-A-8-331723

  However, in order to cut an electric wire, it is necessary to bring the two electric wire holding parts holding the electric wire closer. When the two electric wire gripping portions are brought close to each other, the tension of the electric wire attached to the electric pole may reach several thousand [N]. Due to the tension of the electric wire, a moment of force (hereinafter simply referred to as “moment”) is applied to the support rod to which the two gripping portions for holding the electric wire are attached. If the moment applied to the support bar is excessively large, the wire cutting tool may be damaged.

  An object of the present invention is to provide a highly durable wire cutting tool and a wire cutting method using the same, in which a new wire can be attached to a utility pole while utilizing a part of the old wire in wire cutting work. Is to provide.

  The wire cutting tool of the present embodiment includes a first electric wire gripping portion, a second electric wire gripping portion, an extendable first support bar, an extendable second support rod, a bending portion, and an extension operation portion. . The 1st electric wire holding part can hold a part of electric wire. The second electric wire gripping part can grip another part of the electric wire. The first support rod is disposed between the first electric wire gripping portion and the second electric wire gripping portion, and is attached to the first electric wire gripping portion. The second support rod is disposed between the first electric wire gripping portion and the second electric wire gripping portion, and is attached to the second electric wire gripping portion. The bent portion connects the first support bar and the second support bar, and can change the angle formed by the first support bar and the second support bar. The expansion / contraction operation part is attached to the first electric wire gripping part or the second electric wire gripping part, and expands / contracts at least one of the first support bar and the second support bar.

  The wire cutting method of the present embodiment includes a step of preparing the above wire cutting tool (preparation step), a step of gripping the electric wire (gripping step), and a step of shrinking the first support rod and the second support rod ( An expansion and contraction step), a step of cutting an electric wire (cutting step), and a step of connecting a new electric wire (connection step). In the holding step, the electric wire is held by the first electric wire holding portion and the second electric wire holding portion. In the expansion / contraction process, the first support rod and the second support rod are contracted by the expansion / contraction operation unit in a state where the electric wire is held by the first electric wire holding unit and the second electric wire holding unit. The angle formed is less than 180 °. In a cutting process, the electric wire between the 1st electric wire holding part and the 2nd electric wire holding part is cut in the state where the 1st support bar and the 2nd support bar were shrunk. In the connection step, one of the cut wires and a new wire are connected.

  The electric wire cutting tool according to the present invention can attach a new electric wire to a utility pole while utilizing a part of the old electric wire in electric wire cutting work, and has high durability. The electric wire cutting method according to the present invention can attach a new electric wire to a utility pole while utilizing a part of the old electric wire in the electric wire cutting work.

FIG. 1 is a front view of a wire cutting tool. FIG. 2 is a longitudinal sectional view of the wire cutting tool. FIG. 3 is an enlarged view of the vicinity of the wire gripping portion in FIG. FIG. 4 is a cross-sectional view of the first support rod. FIG. 5 is a front view showing a wire cutting tool in which the first support bar is bent with respect to the second support bar. FIG. 6 is a front view showing the wire cutting tool when the wire is cut. FIG. 7 is a diagram schematically showing a gripping process using a wire cutting tool provided with a conducting wire. FIG. 8 is a diagram schematically showing a cutting process using a wire cutting tool provided with a conducting wire. FIG. 9 is a diagram schematically illustrating a connection process using a wire cutting tool provided with a conductive wire. Drawing 10 is a figure showing typically the state after completion of wire cutting work by a wire cutting tool provided with conducting wire.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

[Wire cutting tool]
FIG. 1 is a front view of a wire cutting tool. Referring to FIG. 1, a wire cutting tool 1 includes a first wire gripping portion 2A, a second wire gripping portion 2B, a first support rod 3, a second support rod 4, a bending portion 5, and expansion and contraction. And an operation unit 6. FIG. 1 shows a state where the first support bar 3 and the second support bar 4 are fully extended.

[First electric wire holding part and second electric wire holding part]
The structure of the first electric wire gripping part 2A is symmetrical with the structure of the second electric wire gripping part 2B. Therefore, in the following, unless otherwise specified, the “wire gripping portion” means a generic name of the first wire gripping portion 2A and the second wire gripping portion 2B, and the symbol thereof is “2”. The electric wire holding part 2 can hold a part of the electric wire.

  FIG. 2 is a longitudinal sectional view of the wire cutting tool. FIG. 3 is an enlarged view of the vicinity of the wire gripping portion in FIG. With reference to FIGS. 2 and 3, the electric wire gripping portion 2 includes a lower gripping block 7 and an upper gripping block 8. A knob 9 is attached to the lower gripping block 7. By operating the knob 9, the lower gripping block 7 can approach or leave the upper gripping block 8. Thereby, the electric wire arrange | positioned between the lower holding block 7 and the upper holding block 8 can be hold | gripped. A fastening screw 10 is attached to the upper gripping block 8. The tightening screw 10 can also adjust the distance between the lower gripping block 7 and the upper gripping block 8 in the same manner as the knob 9. For example, the electric wire is temporarily gripped by operating the knob 9 with a human hand. Then, the electric wire holding part 2 hold | grips an electric wire firmly by carrying out the final fastening of the fastening screw 10 using a tool etc.

  The electric wire holding part 2 may have electroconductivity. In this case, the material of the electric wire holding part 2 is steel, copper, aluminum, etc., for example. As will be described later, when the wire cutting tool 1 includes the conductive wire 11, the electrical wires from which the conductive wire 11 has been cut can be electrically connected. As a result, it is possible to carry out wire cutting work without causing a power failure in the construction section.

  The electric wire gripping part 2 has a through hole 12. An internal thread portion is formed on the inner peripheral surface of the through hole 12. As will be described later, the expansion / contraction operation unit 6 passes through the through hole 12.

[First and second support bars]
With reference to FIG. 1, the first support rod 3 is disposed between two electric wire gripping portions 2. The first support rod 3 is attached to the first electric wire gripping portion 2A. The first support bar 3 can be extended and contracted.

  With reference to FIG. 2, the first support rod 3 includes an inner cylinder 13 and an outer cylinder 14. The inner cylinder 13 can be accommodated inside the outer cylinder 14. The inner cylinder 13 is slidably accommodated with the outer cylinder 14. The inner cylinder 13 is attached to the first electric wire gripping part 2A. The outer cylinder 14 is attached to the bent portion 5. Therefore, the inner cylinder 13 is slidable with respect to the outer cylinder 14 integrally with the first electric wire gripping portion 2A. That is, by sliding the inner cylinder 13 with respect to the outer cylinder 14, the first support rod 3 expands and contracts.

  FIG. 4 is a cross-sectional view of the first support rod. In FIG. 4, illustration of the telescopic operation unit is omitted. As will be described later, when the first support bar 3 is expanded and contracted, the expansion / contraction operation unit 6 is rotated (see FIG. 2). Further, if the cross-sectional shapes of the inner cylinder 13 and the outer cylinder 14 are elliptical, no slippage (idle) occurs on the contact surface between the inner cylinder 13 and the outer cylinder 14 when the telescopic operation unit 6 is rotated. One of the parts 2 can keep the original position in the circumferential direction without being rotated in accordance with the rotation of the telescopic operation part 6, and workability is improved. From the viewpoint of the strength of the cylinder, the cross-sectional shapes of the inner cylinder 13 and the outer cylinder 14 are preferably elliptical. However, the cross-sectional shapes of the inner cylinder 13 and the outer cylinder 14 are similar to each other, and the cross-sectional shapes of the inner cylinder 13 and the outer cylinder 14 are similar. The same effect can be obtained when the portion has a different curvature from the others, or when the inner cylinder 13 and the outer cylinder 14 are provided with notches and protrusions to prevent rotation.

  Since the second support bar 4 is simply the left and right sides of the first support bar 3 reversed, detailed description thereof is omitted.

[Bent part]
FIG. 5 is a front view showing the wire cutting tool in a state in which the first support bar is bent with respect to the second support bar. For example, the bent portion 5 may be covered with a rubber tube 15 (see FIG. 2). In FIG. 5, the tube 15 covering the bent portion 5 is omitted for easy understanding. Referring to FIG. 5, bent portion 5 is, for example, a universal joint. The type of universal joint may be an inconstant speed type or a constant speed type. However, since a moment is applied to the first support rod 3 and the second support rod 4, an inconstant velocity universal joint is preferable.

  The bent portion 5 connects the first support bar 3 and the second support bar 4. The bent portion 5 can change the angle formed by the first support bar 3 and the second support bar 4. That is, the first support bar 3 can be bent with respect to the second support bar 4.

  Here, when it is assumed that the wire cutting tool 1 does not include the bent portion 5, a moment applied to the wire cutting tool will be described. That is, a wire cutting tool in which the first support bar 3 is integrated with the second support bar 4 will be described. As will be described later, when the electric wires are cut, the distance between the two electric wire gripping portions 2 is reduced in a state where the two electric wire gripping portions 2 hold the electric wires 20. When the distance between the two electric wire gripping portions 2 is reduced, a tension is applied to the electric wires 20 outside the two electric wire gripping portions 2. Due to the tension of the electric wire 20, the first support rod 3 and the second support rod 4 are loaded with a moment with one wire gripping portion 2 as a fulcrum and the other wire gripping portion 2 as an action point. That is, regarding the moment applied to the electric wire cutting tool provided with the integrated support rod, the distance between the two electric wire gripping portions 2 is the length of the arm. If this moment is excessively large, the first support bar 3 and the second support bar 4 are likely to be damaged.

  Therefore, the wire cutting tool 1 of this embodiment includes a bent portion 5 that can bend the first support bar 3 with respect to the second support bar 4. When a moment due to the tension of the electric wire 20 is applied to the first support bar 3 and the second support bar 4, the first support bar 3 bends with respect to the second support bar 4. In other words, the angle formed by the first support bar 3 and the second support bar 4 is less than 180 °. Due to this bending, the first support rod 3 and the second support rod 4 are loaded with a moment having the bent portion 5 as a fulcrum and the two wire gripping portions 2 as operating points. That is, regarding the moment applied to the electric wire cutting tool provided with a bending part, the distance between the bending part 5 and the electric wire holding part 2 becomes an arm length. That is, the length of the arm is shortened in the wire cutting tool 1 including the bent portion 5. Therefore, the moment due to the tension of the electric wire 20 is distributed to the first support rod 3 and the second support rod 4, and the moment loaded on the first support rod 3 or the second support rod 4 is an electric wire that does not have a bent portion. Reduced compared to cutting tools. Thereby, the durability of the wire cutting tool 1 is increased.

  In particular, when the electric wire held by the electric wire cutting tool is not horizontal, a moment is easily applied to the electric wire cutting tool. The wire cutting tool 1 of this embodiment is particularly effective in such a case.

[Expandable operation part]
With reference to FIG. 2, the telescopic operation unit 6 includes a first rod portion 16 and a second rod portion 17. The first rod portion 16 passes through the through hole 12 of the first electric wire gripping portion 2A (see FIG. 3). Thereby, the telescopic operation part 6 is attached to the electric wire gripping part 2. The second rod portion 17 passes through the through hole 12 of the second electric wire gripping portion 2B.

  Referring to FIG. 3, a male thread portion is formed on the outer peripheral surface of first rod portion 16. The male screw portion of the first rod portion 16 meshes with the female screw portion of the through hole 12 of the first electric wire gripping portion 2A. Accordingly, when the first rod portion 16 rotates, the first rod portion 16 moves relative to the first electric wire gripping portion 2A in the direction in which the screw advances (or in the backward direction). Thereby, the distance between 2 A of 1st electric wire holding parts and the bending part 5 is adjusted. Moreover, the inner cylinder 13 is attached to the electric wire holding part 2, and the outer cylinder 14 is attached to the bending part 5 (refer FIG. 2). Therefore, the inner cylinder 13 enters and leaves the outer cylinder 14 according to the distance between the wire gripping portion 2 and the bent portion 5. Thereby, the expansion / contraction operation part 6 can expand and contract the first support rod 3.

  Referring to FIG. 2, the first rod portion 16 passes through the inner cylinder 13 and the outer cylinder 14 and is attached to the bent portion 5. A second rod portion 17 is attached to the bent portion 5. Therefore, if the first rod portion 16 rotates, the second rod portion 17 also rotates through the bent portion 5. A male screw portion opposite to the male screw portion of the first rod portion 16 is formed on the outer peripheral surface of the second rod portion 17. For example, if the external thread portion of the first rod portion 16 is a right-hand thread, the external thread portion of the second rod portion 17 is a left-hand thread. The second rod portion 17 has the same configuration as the first rod portion 16. Therefore, if the 2nd rod part 17 rotates, the 2nd rod part 17 will move with respect to the 2nd electric wire holding part 2B in the direction which a screw advances (or the direction which reverses). Thereby, the expansion / contraction operation part 6 can expand and contract the second support bar 4 together with the first support bar 3.

  According to such a configuration, by operating the expansion / contraction operation unit 6, the first support bar 3 and the second support bar 4 expand and contract in conjunction with each other, and the right and left balance of the wire cutting tool 1 can be balanced. . Moreover, according to such a structure, the expansion / contraction operation part 6 can expand / contract the 1st support bar 3 and the 2nd support bar 4 directly. Therefore, the configuration of the telescopic operation unit 6 is simplified as compared with the prior art in which the support rod is indirectly operated via a gear box or the like.

  FIG. 6 is a front view showing the wire cutting tool when the wire is cut. With reference to FIG. 6, in a state where the electric wire 20 is gripped by the electric wire cutting tool 1, the cutting of the electric wire 20 is completed by performing a cutting process and a connecting process described later.

  Then, the electric wire cutting method using the electric wire cutting tool 1 is demonstrated. The wire cutting method includes a preparation process, a gripping process, an expansion / contraction process, a cutting process, and a connection process.

[Preparation process]
In the preparation step, the above-described wire cutting tool 1 is prepared.

[Gripping process]
In the holding step, the electric wire 20 is held by the two electric wire holding portions 2. The two electric wire holding parts 2 hold the part from which the coating of the electric wire 20 has been removed. More specifically, the electric wire 20 is sandwiched between the lower gripping block 7 and the upper gripping block 8 (see FIG. 3). In addition, the process of removing the coating | cover of the electric wire 20 is implemented before a holding process.

[Extension process]
Referring to FIG. 5, in the expansion / contraction process, in a state where the electric wire 20 is gripped by the two electric wire gripping portions 2, the expansion / contraction operation portion 6 is operated so as to contract the first support rod 3 and the second support rod 4. Thereby, the distance between the two electric wire gripping parts 2 is shortened, and the electric wire 20 between the two electric wire holding parts 2 is bent. That is, no tension is applied to the electric wire 20 between the two electric wire gripping portions 2. Therefore, cutting of the electric wire 20 becomes easy.

  As described above, in the expansion / contraction process, the first support rod 3 is bent with respect to the second support rod 4 by the bent portion 5. Therefore, the moment due to the tension of the electric wire 20 is distributed to the first support rod 3 and the second support rod 4, and the moment loaded on the first support rod 3 or the second support rod 4 is an electric wire that does not have a bent portion. Reduced compared to cutting tools. Thereby, the durability of the wire cutting tool 1 is increased.

[Cutting process]
In a cutting process, the electric wire 20 between the two electric wire holding parts 2 is cut in a state where the first support rod 3 and the second support rod 4 are contracted.

[Connection process]
With reference to FIG. 6, in the connecting step, one of the cut electric wires 20 and a new electric wire 19 are connected. Thereby, the separation of the electric wires is completed. In addition, what is necessary is just to implement the connection of electric wires by a known method.

  The electric wire cutting method according to this embodiment has been described above. Next, another aspect of the wire cutting tool will be described.

[Conductor]
The wire cutting tool 1 may further include a conductive wire 11 that connects the two wire gripping portions 2. In this case, the two electric wire gripping parts 2 have conductivity. That is, the two electric wire gripping portions 2 are electrically connected via the conducting wire 11.

  FIG. 7 is a diagram schematically showing a gripping process using a wire cutting tool provided with a conducting wire. With reference to FIG. 7, the electric wire 20 is gripped by the electric wire cutting tool 1. After the two electric wire gripping parts 2 hold the electric wire 20, it is preferable that the two electric wire holding parts 2 are covered with an insulating sheet or the like. This is to prevent the operator from touching the electric wire gripping portion 2.

  FIG. 8 is a diagram schematically showing a cutting process using a wire cutting tool provided with a conducting wire. With reference to FIG. 8, as described above, in the cutting step, the electric wire 20 between the two electric wire gripping portions 2 is cut. At this time, the two electric wire holding portions 2 are holding the cut electric wires 20, and the two electric wire holding portions 2 are connected by the conductive wires 11. Therefore, the cut electric wire 20 remains electrically connected via the electric wire cutting tool 1. Thereby, the electric wire can be separated without causing a power failure in the section where the electric wire is separated. That is, the conducting wire 11 has a bypass function.

  In this case, since the electricity of the voltage which has flowed through the electric wire 20 flows through the conducting wire 11, it is preferable that the conducting wire 11 can carry the same degree of electricity as the electric wire 20 to be separated. Moreover, it is preferable that an identification mark is attached to the conducting wire 11 in order to identify the electric wire 20 to be separated from the conducting wire 11.

  FIG. 9 is a diagram schematically illustrating a connection process using a wire cutting tool provided with a conductive wire. Referring to FIG. 9, one of the cut electric wires 20 is connected to the new utility pole 18. More specifically, one of the cut electric wires 20 is connected to a new electric wire 19 (addition line) attached to the new power pole 18.

  Drawing 10 is a figure showing typically the state after completion of wire cutting work by a wire cutting tool provided with conducting wire. Referring to FIG. 10, after the transfer to the new utility pole 18 is completed, the old utility pole 21 and the old electric wire 22 attached to the old utility pole 21 (see the broken line in FIG. 10) are removed. On the other hand, one of the cut electric wires 20 is connected to the new electric wire 19. That is, if the wire cutting tool 1 is used, the new electric wire 19 can be attached to the new utility pole 18 in a state where a part of the old electric wire 22 is utilized.

  The embodiment of the present invention has been described above. However, the above-described embodiment is merely an example for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing the above-described embodiment without departing from the spirit thereof.

  In the above-described embodiment, the case where the wire cutting tool includes the conductive wire has been described. That is, the case where the wire cutting tool has a function (bypass function) for electrically connecting the old wire and the additional wire has been described. However, the wire cutting tool of this embodiment is not limited to this case. The electric wire cutting tool does not need to have a conducting wire. This is because the bypass function is not necessary when power is cut off in the construction section and the wires are separated.

  In the above-described embodiment, the case where the first support rod and the second support rod are expanded and contracted by the first rod portion and the second rod portion including the male screw portion and the through hole including the female screw portion on the inner peripheral surface has been described. However, the wire cutting tool of this embodiment is not limited to this case. For example, the expansion / contraction operation part may include only the first rod part. In this case, only one of the first support bar and the second support bar expands and contracts, but the distance between the two wire gripping portions can be adjusted. Further, the telescopic operation unit is not limited to the configuration of the above-described embodiment. That is, the expansion / contraction operation unit may have a known configuration other than the configuration of the above-described embodiment.

  In the above-described embodiment, the case where the bent portion is a universal joint has been described. However, the wire cutting tool of this embodiment is not limited to this case. For example, the bent portion may be bent only in one direction. Even in this case, if the direction of the applied moment and the bending direction of the bent portion are adjusted, the moment applied to the first support rod and the second support rod can be reduced as described above.

  As described above, the wire cutting tool of the present embodiment includes the first wire gripping portion, the second wire gripping portion, the extendable first support rod, the extendable second support rod, and the bending portion. And a telescopic operation unit. The 1st electric wire holding part can hold a part of electric wire. The second electric wire gripping part can grip another part of the electric wire. The first support rod is disposed between the first electric wire gripping portion and the second electric wire gripping portion, and is attached to the first electric wire gripping portion. The second support rod is disposed between the first electric wire gripping portion and the second electric wire gripping portion, and is attached to the second electric wire gripping portion. The bent portion connects the first support bar and the second support bar, and can change the angle formed by the first support bar and the second support bar. The expansion / contraction operation part is attached to the first electric wire gripping part or the second electric wire gripping part, and expands / contracts at least one of the first support bar and the second support bar.

  The wire cutting tool includes a bent portion that can bend the first support bar with respect to the second support bar. When a moment due to the tension of the electric wire is applied to the first support bar and the second support bar, the first support bar bends with respect to the second support bar. In other words, the angle formed by the first support bar and the second support bar is less than 180 °. As a result of this bending, the first support rod and the second support rod are loaded with a moment having the bent portion as a fulcrum and the two wire gripping portions as action points. That is, regarding this moment, the distance between the bent portion and the wire gripping portion is the length of the arm. Therefore, the moment due to the tension of the electric wire is distributed to the first support rod and the second support rod, and the moment applied to each of the first support rod or the second support rod is compared with that of the wire cutting tool without a bent portion. Reduced. This increases the durability of the wire cutting tool.

  The above-described wire cutting tool may further include a conducting wire that connects the first electric wire gripping portion and the second electric wire gripping portion. In this case, the 1st electric wire holding part and the 2nd electric wire holding part have electroconductivity.

  When cutting an electric wire, the two electric wire holding parts are holding the cut electric wire, and the two electric wire holding parts are connected by a conducting wire. Therefore, the cut electric wire remains electrically connected via the electric wire cutting tool. Thereby, the electric wire can be separated without causing a power failure in the section where the electric wire is separated.

  In the above-described wire cutting tool, each of the first wire holding portion and the second wire holding portion may have a through hole including a female screw portion. The first support rod includes an inner cylinder attached to the first electric wire gripping part and an outer cylinder attached to the bent part. The second support rod includes an inner cylinder attached to the second electric wire gripping part and an outer cylinder attached to the bent part. The expansion / contraction operation unit may include a first rod portion that passes through the through hole of the first electric wire gripping portion and a second rod portion that passes through the through hole of the second electric wire gripping portion. The first rod portion includes a male screw portion that meshes with the female screw portion, and is attached to the bent portion through the inner and outer cylinders of the first support rod. The second rod portion includes a male screw portion that meshes with the female screw portion, and is attached to the bent portion through the inside of the inner cylinder and the outer cylinder of the second support rod.

  According to such a configuration, by operating the expansion / contraction operation unit, the first support bar and the second support bar expand and contract in conjunction with each other, and the right and left balance of the wire cutting tool can be balanced.

  In the above electric wire cutting tool, the bent portion may be a universal joint. This is because the first support bar can be bent in various directions with respect to the second support bar.

  The wire cutting method of the present embodiment includes a step of preparing the above wire cutting tool (preparation step), a step of gripping the electric wire (gripping step), and a step of shrinking the first support rod and the second support rod ( An expansion and contraction step), a step of cutting an electric wire (cutting step), and a step of connecting a new electric wire (connection step). In the holding step, the electric wire is held by the first electric wire holding portion and the second electric wire holding portion. In the expansion / contraction process, the first support rod and the second support rod are contracted by the expansion / contraction operation unit in a state where the electric wire is held by the first electric wire holding unit and the second electric wire holding unit. The angle formed is less than 180 °. In a cutting process, the electric wire between the 1st electric wire holding part and the 2nd electric wire holding part is cut in the state where the 1st support bar and the 2nd support bar were shrunk. In the connection step, one of the cut wires and a new wire are connected.

1: Wire cutting tool 2: Electric wire gripping part 3: First support bar 4: Second support bar 5: Bending part 6: Extending and contracting part 7: Lower gripping block 8: Upper gripping block 9: Knob 10: Clamping screw 11 : Conductor 12: Through hole 13: Inner tube 14: Outer tube 15: Tube 16: First rod portion 17: Second rod portion 18: New electric pole 19: New electric wire 20: Electric wire 21: Old electric pole 22: Old electric wire

Claims (5)

A first electric wire gripper capable of gripping a part of the electric wire;
A second electric wire gripper capable of gripping another part of the electric wire;
A first support rod disposed between the first electric wire gripping portion and the second electric wire gripping portion, attached to the first electric wire gripping portion, and extendable and contractable;
A second support rod disposed between the first wire gripping portion and the second wire gripping portion, attached to the second wire gripping portion, and extendable;
A bent portion that connects the first support rod and the second support rod, and is capable of changing an angle formed by the first support rod and the second support rod;
An electric wire cutting tool comprising: an expansion / contraction operation unit that is attached to the first electric wire gripping part or the second electric wire gripping part and expands / contracts at least one of the first support bar and the second support bar. The wire cutting tool according to claim 1, further comprising:
A conductive wire connecting the first electric wire gripping part and the second electric wire gripping part,
The first electric wire gripping portion and the second electric wire gripping portion are conductive wire cutting tools. The wire cutting tool according to claim 1,
Each of the first electric wire gripping portion and the second electric wire gripping portion has a through hole including a female screw portion,
The first support rod includes an inner cylinder attached to the first electric wire gripping part and an outer cylinder attached to the bent part,
The second support rod includes an inner cylinder attached to the second electric wire gripping part and an outer cylinder attached to the bent part,
The telescopic operation part includes a first bar part passing through the through hole of the first electric wire gripping part, and a second bar part passing through the through hole of the second electric wire gripping part,
The first rod portion includes a male screw portion that meshes with the female screw portion, is attached to the bent portion through the inner cylinder and the outer cylinder of the first support rod,
The second rod portion includes a male screw portion that meshes with the female screw portion, and passes through the inner and outer cylinders of the second support rod and is attached to the bent portion. The wire cutting tool according to claim 1,
The electric wire cutting tool, wherein the bent portion is a universal joint. Preparing the wire cutting tool according to any one of claims 1 to 4, and
Gripping the electric wire with the first electric wire gripping portion and the second electric wire gripping portion;
In a state where the electric wire is held by the first electric wire holding part and the second electric wire holding part, the first support bar and the second support bar are contracted by the expansion / contraction operation part, and the first support bar and the second support bar are contracted. The step of making the angle made with the rod less than 180 °;
Cutting the electric wire between the first electric wire gripping portion and the second electric wire gripping portion with the first support rod and the second support rod being contracted;
A method of cutting a wire, comprising: connecting one of the cut wires and a new wire.

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