JP2016174489A - Electric pole sandwiching tool and protection sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric pole sandwiching tool which facilitates attachment work of a protection sheet when indirect hot line work is conducted.SOLUTION: An electric pole sandwiching tool includes: a first arm; a second arm; a first connection member which connects one end of the first arm with one end of the second arm so that the first arm and the second arm may swing in a direction in which the first arm and the second arm move away from each other or in a direction in which the first arm and the second arm move close to each other; a first elastic member which applies a force in the direction in which the first arm and the second arm move close to each other; a third arm provided at the other end of the first arm; a fourth arm provided at the other end of the second arm; a second connection member which connects the first arm with the third arm so that the third arm may swing; a second elastic member which applies a force to the third arm in a direction in which the third arm moves close to the fourth arm; a third connection member which connects the second arm with the fourth arm so that the fourth arm may swing; and a third elastic member which applies a force to the fourth arm in a direction in which the fourth arm moves close to the third arm.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a utility pole clamping tool and a protective sheet.

  When hot wire work is performed on a high-voltage electric wire on a utility pole, an insulating protective sheet is attached to the surface of the utility pole in order to prevent a ground fault due to contact between the utility pole and the wire. The protective sheet is a flexible member, and is attached so as to be wound around a utility pole. As a technique for attaching such a protective sheet to a utility pole, for example, a technique shown in Patent Document 1 is known.

Japanese Patent Laid-Open No. 9-191518

  When performing an indirect hot wire operation, a hot stick which is an insulating rod-like tool is used. A hot stick is also used for attaching the protective sheet. For example, when the conventional technique as shown in Patent Document 1 is used, it is necessary to open the gripping part by sandwiching an opening / closing operation part provided with a torsion coil spring with a hot stick. However, since it is not easy to open the gripping part by sandwiching the opening / closing operation part with a hot stick, it may be difficult to attach the protective sheet.

  This invention is made | formed in view of the above, Comprising: It aims at providing the utility pole clamping tool which can make easy the attachment operation | work of the protection sheet at the time of performing an indirect hot wire operation | work.

  In order to solve the above-described problems and achieve the object, a utility pole clamping tool according to the present invention includes a curved first arm, a second arm curved opposite to the first arm, and the first arm. A first connecting member that connects one end of the first arm and one end of the second arm, and the first arm and the second arm so that the second arm can swing in a direction away from and close to the second arm. A first elastic member that applies forces in a direction approaching each other, a third arm provided at the other end of the first arm, a fourth arm provided at the other end of the second arm, and the third arm A second connecting member for connecting the other end of the first arm and one end of the third arm so as to swing in a direction away from and approaching the fourth arm; and a direction approaching the fourth arm The power of the first A second elastic member to be added to the arm and the other end of the second arm and one end of the fourth arm are connected so that the fourth arm can swing in a direction away from and closer to the third arm. And a third elastic member that applies a force in a direction approaching the third arm to the fourth arm.

  The utility pole clamping tool has the second connecting member and the third connecting member, so that the tip can be easily opened. Thereby, the utility pole clamping tool can easily sandwich the utility pole between the third arm and the fourth arm. When the utility pole clamping tool is pushed into the utility pole, the first arm and the second arm are opened by the reaction force from the utility pole, and the protective sheet is sandwiched by the elastic force of the first elastic member. When the utility pole clamping tool is further pushed in, the third arm and the fourth arm are closed along the surface on the back side of the utility pole by the elastic force of the second elastic member and the third elastic member. Thus, since the utility pole clamping tool can utilize the reaction force from the utility pole, the operation for attaching the protective sheet to the utility pole can be simplified as compared with the prior art. Therefore, the utility pole clamping tool can facilitate the work of attaching the protective sheet when performing the indirect hot wire work.

  As a desirable mode of the present invention, it is preferable that when the other end of the third arm and the other end of the fourth arm are pressed against the utility pole, the third arm and the fourth arm swing in a direction away from each other. For this reason, according to the utility pole clamping tool, the protective sheet can be attached by a simple operation of pushing into the utility pole.

  As a desirable mode of the present invention, it is preferable that the other end of the third arm is disposed with a gap from the other end of the fourth arm. Thereby, when the other end of the third arm and the other end of the fourth arm are pressed against the utility pole, the utility pole easily enters between the third arm and the fourth arm. For this reason, it becomes easier to open the third arm and the fourth arm.

  As a desirable aspect of the present invention, a first operating portion provided in a direction different from the first arm from the first connecting member and interlocking with the first arm, and a second operating portion from the first connecting member. It is preferable to include a second operation unit that is provided in a direction different from the arm and interlocks with the second arm. Thereby, the clearance gap between a 3rd arm and a 4th arm can be expanded by the holding | grip of a 1st operation part and a 2nd operation part. For this reason, the third arm and the fourth arm are more easily opened when the utility pole clamping tool is pressed against the utility pole.

  As a desirable mode of the present invention, a third operating part attached to the first operating part, the third operating part and the third arm are connected, and the third operating part is connected in accordance with the displacement of the third operating part. It is preferable to include a first operating string that swings the arm. Thereby, the clearance gap between a 3rd arm and a 4th arm is expanded previously by gripping a 1st operation part. For this reason, when the utility pole clamping tool is pushed into the utility pole, the third arm and the fourth arm are easily opened. Therefore, the utility pole clamping tool can facilitate the work of attaching the protective sheet.

  As a desirable mode of the present invention, a fourth operating part attached to the second operating part, the fourth operating part and the fourth arm are connected, and the fourth operating part is connected in accordance with the displacement of the fourth operating part. It is preferable to include a second operating string that swings the arm. Thereby, if either one of the 1st operation part and the 2nd operation part is grasped, the crevice between the 3rd arm and the 4th arm will be expanded. For this reason, the operation | work which expands the clearance gap between a 3rd arm and a 4th arm previously becomes easier.

  The protective sheet according to the present invention is an insulating and flexible sheet to which at least two utility pole clamping tools are attached, wherein the first storage unit stores the first arm and the third arm; And a second storage portion for storing the second arm and the fourth arm. This eliminates the step of first winding the protective sheet around the utility pole and holding it with a hot stick. For this reason, the protective sheet can facilitate the work of protecting the utility pole when performing the indirect hot wire work.

  ADVANTAGE OF THE INVENTION According to this invention, the utility pole clamping tool which can make easy the attachment operation | work of the protection sheet at the time of performing an indirect hot wire operation | work can be provided.

FIG. 1 is a plan view showing a utility pole clamping tool according to the present embodiment. FIG. 2 is a side view showing a state where the utility pole clamping tool according to this embodiment is attached to the utility pole. 3 is a cross-sectional view taken along line AA in FIG. FIG. 4 is a perspective view showing a first elastic member provided in the utility pole clamping tool according to the present embodiment. FIG. 5 is a schematic diagram for explaining a method of attaching the protective sheet to the utility pole using the utility pole clamping tool according to the present embodiment. FIG. 6 is a schematic diagram for explaining a method of attaching the protective sheet to the utility pole using the utility pole clamping tool according to the present embodiment. FIG. 7 is a schematic diagram for explaining a method of attaching the protective sheet to the utility pole using the utility pole clamping tool according to the present embodiment. FIG. 8 is a plan view showing a utility pole clamping tool according to the first modification. FIG. 9 is a cross-sectional view illustrating a state where the utility pole clamping tool according to the first modification is attached to the utility pole. FIG. 10 is a schematic diagram for explaining a method of attaching the protective sheet to the utility pole using the utility pole clamping tool according to the first modification. FIG. 11 is a schematic diagram for explaining a method of attaching the protective sheet to the utility pole using the utility pole clamping tool according to the first modification. FIG. 12 is a side view showing a state in which the protective sheet according to Modification 2 is attached to the utility pole. 13 is a cross-sectional view taken along the line BB in FIG.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited by the following modes for carrying out the invention (hereinafter referred to as embodiments). In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. Furthermore, the constituent elements disclosed in the following embodiments can be appropriately combined.

(Embodiment)
FIG. 1 is a plan view showing a utility pole clamping tool according to the present embodiment. FIG. 2 is a side view showing a state where the utility pole clamping tool according to this embodiment is attached to the utility pole. 3 is a cross-sectional view taken along line AA in FIG. FIG. 4 is a perspective view showing a first elastic member provided in the utility pole clamping tool according to the present embodiment. As shown in FIG. 2, the utility pole clamping tool 10 is a tool used for attaching the protective sheet 8 to the utility pole 100. When attaching the protection sheet 8 to the utility pole 100, for example, two utility pole clamping tools 10 are used. The protective sheet 8 is formed of, for example, EVA (Ethylene-Vinyl Acetate), that is, ethylene-vinyl acetate copolymer resin, and has insulation and flexibility.

  As shown in FIG. 1, the utility pole clamping tool 10 according to this embodiment includes a first arm 11, a second arm 12, a third arm 13, a fourth arm 14, a first connecting member 31, 2 connection member 32, 3rd connection member 33, 1st elastic member 41, 2nd elastic member 42, 3rd elastic member 43, 1st operation part 51, and 2nd operation part 52 are provided. .

  As shown in FIG. 1, the first arm 11 is a curved member. The second arm 12 is disposed so as to face the first arm 11 and is curved opposite to the first arm 11 in plan view. As shown in FIG. 3, the first arm 11 and the second arm 12 are curved with a curvature substantially equal to the curvature of the surface of the utility pole 100. The first arm 11 and the second arm 12 are made of an insulating material such as plastic. The first arm 11 and the second arm 12 are hollow members having a cavity inside.

  The 1st connection member 31 is a member which has a hinge, for example. The first connecting member 31 connects the first arm 11 and the second arm 12 so that the first arm 11 and the second arm 12 can swing relatively. The first connecting member 31 connects one end of the first arm 11 and one end of the second arm 12. Therefore, the first arm 11 can rotate around one end of the second arm 12 (first connecting member 31), and the second arm 12 has one end of the first arm 11 (first connecting member 31). Can be rotated around. In the following description, it is described that the first arm 11 and the second arm 12 swing away from each other when the first arm 11 and the second arm 12 are opened. Oscillating so that they approach each other is described as the first arm 11 and the second arm 12 are closed.

  The first operation unit 51 is provided from the first connecting member 31 in a direction different from the first arm 11. Specifically, the first operation unit 51 according to the present embodiment is formed integrally with the first arm 11 at one end of the first arm 11, and interlocks with the first arm 11.

  The second operation unit 52 is provided from the first connecting member 31 in a direction different from the second arm 12. Specifically, the second operation unit 52 according to the present embodiment is formed integrally with the second arm 12 at one end of the second arm 12 and interlocks with the second arm 12.

  The first elastic member 41 is disposed across the first operation unit 51 and the second operation unit 52. As shown in FIG. 4, the first elastic member 41 is a torsion coil spring, for example, and includes a spiral main body 413, a first end 411 protruding from one end of the main body 413, and the main body 413. A second end portion 412 protruding from the end.

  The first end 411 is in contact with the first operation unit 51, and the second end 412 is in contact with the second operation unit 52. When the first operation unit 51 and the second operation unit 52 approach each other due to an external force, the first end 411 approaches the second end 412. As a result, an elastic force is generated in the main body portion 413 of the first elastic member 41, so that the first end portion 411 and the second end portion 412 push back the first operation portion 51 and the second operation portion 52. For this reason, the first elastic member 41 can apply forces in a direction toward each other to the first arm 11 and the second arm 12. Therefore, when the external force that brings the first operation unit 51 and the second operation unit 52 closer to each other is removed, the first arm 11 and the second arm 12 are automatically closed.

  The third arm 13 is a curved member and is disposed at the other end of the first arm 11. The shape of the third arm 13 is an arc shape along the first arm 11. The fourth arm 14 is a curved member and is disposed at the other end of the second arm 12. The shape of the fourth arm 14 is an arc shape along the second arm 12. As shown in FIG. 3, the third arm 13 and the fourth arm 14 are curved with a curvature substantially equal to the curvature of the surface of the utility pole 100. The third arm 13 and the fourth arm 14 are made of an insulating material such as plastic. The third arm 13 and the fourth arm 14 are hollow members having a cavity inside. As shown in FIG. 1, the tip of the third arm 13 is disposed with a gap from the tip of the fourth arm 14 before the utility pole clamping tool 10 is attached to the utility pole 100. Further, the gap between the tip of the third arm 13 and the tip of the fourth arm 14 increases toward the outside.

  The second connecting member 32 is a member having a hinge, for example. The second connecting member 32 connects the first arm 11 and the third arm 13 so that the third arm 13 can swing in a direction away from and closer to the fourth arm 14. The second connecting member 32 connects the other end of the first arm 11 and one end of the third arm 13. In other words, the second connecting member 32 is a joint disposed between the first arm 11 and the third arm 13. For this reason, the third arm 13 can swing about the other end (second connecting member 32) of the first arm 11 as a fulcrum.

  The third connecting member 33 is a member having a hinge, for example. The third connecting member 33 connects the second arm 12 and the fourth arm 14 so that the fourth arm 14 can swing in a direction away from and closer to the third arm 13. The third connecting member 33 connects the other end of the second arm 12 and one end of the fourth arm 14. In other words, the third connecting member 33 is a joint disposed between the second arm 12 and the fourth arm 14. For this reason, the fourth arm 14 can swing around the other end of the second arm 12 (the third connecting member 33) as a fulcrum.

  When the third arm 13 and the fourth arm 14 are swung away from each other, the gap between the tip of the third arm 13 and the tip of the fourth arm 14 increases. When the third arm 13 and the fourth arm 14 are swung so as to approach each other, the gap between the tip of the third arm 13 and the tip of the fourth arm 14 is reduced. In the following description, it is described that the third arm 13 and the fourth arm 14 swing away from each other when the third arm 13 and the fourth arm 14 are opened. Oscillating so that they approach each other is described as the third arm 13 and the fourth arm 14 are closed.

  The second elastic member 42 is, for example, a tension coil spring, and is disposed across the first arm 11 and the third arm 13 inside the first arm 11 and the third arm 13. Both ends of the second elastic member 42 are attached to the first arm 11 and the third arm 13, respectively. More specifically, one end of the second elastic member 42 is attached to the attachment member 111 provided on the inner wall of the first arm 11, and the other end of the second elastic member 42 is provided on the inner wall of the third arm 13. The mounting member 131 is attached. Since the 2nd elastic member 42 is arrange | positioned inside the 1st arm 11 and the 3rd arm 13, possibility that the 2nd elastic member 42 will be reduced reduces.

  The third elastic member 43 is, for example, a tension coil spring, and is disposed across the second arm 12 and the fourth arm 14 inside the second arm 12 and the fourth arm 14. Both ends of the third elastic member 43 are attached to the second arm 12 and the fourth arm 14, respectively. More specifically, one end of the third elastic member 43 is attached to the attachment member 121 provided on the inner wall of the second arm 12, and the other end of the third elastic member 43 is provided on the inner wall of the fourth arm 14. It is attached to the attached attachment member 141. Since the 3rd elastic member 43 is arrange | positioned inside the 2nd arm 12 and the 4th arm 14, possibility that the 3rd elastic member 43 will be reduced reduces.

  The spring constants of the second elastic member 42 and the third elastic member 43 are the second elastic member before the first elastic member 41 is deformed when an external force is applied to the third arm 13 and the fourth arm 14. 42 and the 3rd elastic member 43 are set to the magnitude | size which deform | transforms. Therefore, when an external force in a direction away from the third arm 13 and the fourth arm 14 is applied, the third arm 13 and the fourth arm 14 are opened before the first arm 11 and the second arm 12 are opened.

  The second elastic member 42 may be a torsion coil spring disposed across the first arm 11 and the third arm 13, and the third elastic member 43 may be the second arm 12 and the fourth arm. 14 may be a torsion coil spring that is disposed across the 14. Further, the first elastic member 41 may be a compression coil spring disposed across the first operation unit 51 and the second operation unit 52, or straddle the first arm 11 and the second arm 12. It may be a tension coil spring arranged. For example, when the first elastic member 41, the second elastic member 42, and the third elastic member 43 are torsion coil springs, the spring constants of the second elastic member 42 and the third elastic member 43 are the springs of the first elastic member 41. It is set smaller than the constant. Moreover, the 1st elastic member 41, the 2nd elastic member 42, and the 3rd elastic member 43 may not be a coil spring, but may be other elastic bodies, such as a synthetic rubber, for example.

  5-7 is a schematic diagram explaining the method of attaching a protection sheet to a utility pole using the utility pole clamping tool which concerns on this embodiment. FIG. 5 shows an initial process when the protective sheet 8 is attached to the utility pole 100. FIG. 6 shows a state where the third arm 13 and the fourth arm 14 are opened. FIG. 7 shows a state in which the first arm 11 and the second arm 12 start to open.

  When attaching the protection sheet 8 to the utility pole 100 using the utility pole clamping tool 10, first, the flexible protection sheet 8 is wound around the utility pole 100. The state in which the protective sheet 8 is wound around the utility pole 100 is held by the hot stick 92 as shown in FIG. Thereafter, the tips of the third arm 13 and the fourth arm 14 are brought into contact with the protective sheet 8 in a state where, for example, the first operation unit 51 is gripped by a hot stick 91 different from the hot stick 92.

  Next, the utility pole clamping tool 10 is pushed toward the utility pole 100. That is, the radial force of the utility pole 100 is applied to the utility pole clamping tool 10 via the hot stick 91. When the utility pole clamping tool 10 is pushed in, a reaction force is applied from the utility pole 100 to the third arm 13 and the fourth arm 14. Since the surface of the utility pole 100 is a convex curved surface and there is a gap between the tip of the third arm 13 and the tip of the fourth arm 14, the reaction force from the utility pole 100 causes the third arm as shown in FIG. 5. 13 and the fourth arm 14 are operated in the direction of opening. For this reason, when the utility pole clamping tool 10 is pushed toward the utility pole 100, the third arm 13 and the fourth arm 14 open along the surface of the utility pole 100 as shown in FIG. Further, as the third arm 13 and the fourth arm 14 are opened, the second elastic member 42 and the third elastic member 43 are pulled. Therefore, a force in the direction approaching the fourth arm 14 is applied to the third arm 13 from the second elastic member 42, and a force in the direction approaching the third arm 13 is applied to the fourth arm 14 from the third elastic member 43. It has been.

  Further, when the utility pole clamping tool 10 is pushed in, the first arm 11 and the second arm 12 come into contact with the protective sheet 8 as shown in FIG. Thereby, a reaction force is applied to the first arm 11 and the second arm 12 from the utility pole 100. The reaction force from the utility pole 100 acts in a direction to open the first arm 11 and the second arm 12 as shown in FIG. For this reason, when the utility pole clamping tool 10 is pushed toward the utility pole 100, the first arm 11 and the second arm 12 open along the surface of the utility pole 100.

  As the third arm 13 and the fourth arm 14 move toward the back side of the utility pole 100, the reaction force from the utility pole 100 applied to the third arm 13 and the fourth arm 14 becomes smaller. In addition, the back side of the utility pole 100 means the opposite side in the radial direction of the utility pole 100 with respect to the position where the third arm 13 and the fourth arm 14 first contact. On the other hand, the elastic force of the second elastic member 42 and the third elastic member 43 acts on the third arm 13 and the fourth arm 14 as a restoring force. Accordingly, the third arm 13 and the fourth arm 14 are closed along the surface of the utility pole 100 as shown in FIG. For this reason, the 3rd arm 13 and the 4th arm 14 can hold down the portion located in the back side of electric pole 100 among protection sheets 8. As shown in FIG. 3, the utility pole clamping tool 10 can hold the protective sheet 8 on the utility pole 100 by the first arm 11, the second arm 12, the third arm 13, and the fourth arm 14 along the surface of the utility pole 100.

  The utility pole clamping tool 10 does not necessarily include the first operation unit 51 and the second operation unit 52. In such a case, the 1st arm 11 or the 2nd arm 12 should just be hold | gripped with the hot stick 91, for example.

  As described above, the utility pole clamping tool 10 according to this embodiment includes the first arm 11, the second arm 12, the first connecting member 31, the first elastic member 41, the third arm 13, The four arms 14, the second connecting member 32, the second elastic member 42, the third connecting member 33, and the third elastic member 43 are provided. The first arm 11 is a curved member. The second arm 12 is a member that is curved opposite to the first arm 11. The first connecting member 31 connects one end of the first arm 11 and one end of the second arm 12 so that the first arm 11 and the second arm 12 can swing in a direction away from and closer to each other. The first elastic member 41 applies forces in a direction approaching each other to the first arm 11 and the second arm 12. The third arm 13 is a curved member provided at the other end of the first arm 11. The fourth arm 14 is a curved member provided at the other end of the second arm 12. The second connecting member 32 connects the other end of the first arm 11 and one end of the third arm 13 so that the third arm 13 can swing in a direction away from and approaching the fourth arm 14. The second elastic member 42 applies a force in a direction approaching the fourth arm 14 to the third arm 13. The third connecting member 33 connects the other end of the second arm 12 and one end of the fourth arm 14 so that the fourth arm 14 can swing in a direction away from and closer to the third arm 13. The third elastic member 43 applies a force in a direction approaching the third arm 13 to the fourth arm 14.

  The utility pole clamping tool 10 includes the second connecting member 32 and the third connecting member 33, so that the tip can be easily opened. Thereby, the utility pole clamping tool 10 can easily sandwich the utility pole 100 by the third arm 13 and the fourth arm 14. When the utility pole clamping tool 10 is pushed into the utility pole 100, the first arm 11 and the second arm 12 are opened by the reaction force from the utility pole 100, and the protective sheet 8 is sandwiched by the elastic force of the first elastic member 41. When the utility pole clamping tool 10 is further pushed in, the third arm 13 and the fourth arm 14 are closed along the surface on the back side of the utility pole 100 by the elastic force of the second elastic member 42 and the third elastic member 43. Thus, since the utility pole clamping tool 10 can use the reaction force from the utility pole 100, the operation for attaching the protective sheet 8 to the utility pole 100 can be simplified as compared with the prior art. Therefore, the utility pole clamping tool 10 can facilitate the mounting work of the protective sheet 8 when performing the indirect hot wire work.

  Further, in the utility pole clamping tool 10 according to the present embodiment, when the other end of the third arm 13 and the other end of the fourth arm 14 are pressed against the utility pole 100, the third arm 13 and the fourth arm 14 move away from each other. Swing. For this reason, according to the utility pole clamping tool 10, the protection sheet 8 can be attached by a simple operation of pushing into the utility pole 100.

  Moreover, in the utility pole clamping tool 10 according to the present embodiment, the other end of the third arm 13 is disposed with a gap with respect to the other end of the fourth arm 14. Thereby, when the other end of the third arm 13 and the other end of the fourth arm 14 are pressed against the utility pole 100, the utility pole 100 is likely to enter between the third arm 13 and the fourth arm 14. For this reason, the 3rd arm 13 and the 4th arm 14 become easier to open.

  Moreover, the utility pole clamping tool 10 according to the present embodiment includes a first operation unit 51 and a second operation unit 52. The first operation unit 51 is provided from the first connecting member 31 in a direction different from the first arm 11 and is interlocked with the first arm 11. The second operation unit 52 is provided in a direction different from the second arm 12 from the first connecting member 31 and interlocks with the second arm 12. Thereby, the clearance gap between the 3rd arm 13 and the 4th arm 14 can be expanded by the holding | grip of the 1st operation part 51 and the 2nd operation part 52. FIG. For this reason, when the utility pole clamping tool 10 is pressed against the utility pole 100, the third arm 13 and the fourth arm 14 are more easily opened.

(Modification 1)
FIG. 8 is a plan view showing a utility pole clamping tool according to the first modification. FIG. 9 is a cross-sectional view illustrating a state where the utility pole clamping tool according to the first modification is attached to the utility pole. Note that the same components as those described in the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted.

  As illustrated in FIG. 8, the utility pole holding tool 10 </ b> A according to the first modification includes a third operation unit 53, a first operation string 61, a fourth operation unit 54, and a second operation string 62.

  The third operation unit 53 is a leaf spring provided in the first operation unit 51, for example. One end of the third operation unit 53 is fixed to the first operation unit 51, and the other end is disposed in the first operation unit 51 with a gap. For this reason, the other end of the third operation unit 53 can swing in a direction away from and approaching the first operation unit 51.

  The first operation string 61 is a string-like member such as a wire. The first operation string 61 connects the third arm 13 and the third operation unit 53. More specifically, one end of the first operating cord 61 is fixed to the annular mounting portion 132 provided on the outer surface of the third arm 13, and the annular mounting portion 531 provided to the third operating portion 53 is The other end of one operation string 61 is fixed. As shown in FIG. 8, the first operating string 61 is tensioned in a state before the utility pole clamping tool 10 </ b> A is attached to the utility pole 100. That is, tension is generated in the first operating string 61.

  The fourth operation unit 54 is a leaf spring provided in the second operation unit 52, for example. One end of the fourth operation unit 54 is fixed to the second operation unit 52, and the other end is disposed in the second operation unit 52 with a gap. For this reason, the other end of the fourth operation unit 54 can swing in a direction away from and closer to the second operation unit 52.

  The second operation string 62 is a string-like member such as a wire. The second operation string 62 connects the fourth arm 14 and the fourth operation unit 54. More specifically, one end of the second operation cord 62 is fixed to the annular attachment portion 142 provided on the outer surface of the fourth arm 14, and the second attachment cord 541 provided to the fourth operation portion 54 is connected to the annular attachment portion 541. 2 The other end of the operation cord 62 is fixed. As shown in FIG. 8, the second operation string 62 is tensioned before the utility pole clamping tool 10 </ b> A is attached to the utility pole 100. That is, tension is generated in the second operation string 62.

  In addition, the 3rd operation part 53 and the 4th operation part 54 do not necessarily need to be a leaf | plate spring. For example, the third operation unit 53 and the fourth operation unit 54 may be members that swing by a combination of a hinge and a torsion coil spring.

  The first operation string 61 and the second operation string 62 are not necessarily wires, and may be formed of, for example, a chemical fiber such as polyester, or may be formed of a natural fiber such as hemp. . Moreover, the 1st operation string 61 and the 2nd operation string 62 do not necessarily need to be tensioned, and may be loose.

  10 and 11 are schematic diagrams for explaining a method of attaching the protective sheet to the utility pole using the utility pole clamping tool according to the first modification. FIG. 10 shows a state where the first operation unit 51 and the third operation unit 53 are gripped. FIG. 11 shows a state in which the first arm 11 and the second arm 12 have started to open.

  As shown in FIG. 10, when the first operation unit 51 and the third operation unit 53 are gripped by the hot stick 91, the third operation unit 53 bends in a direction approaching the first operation unit 51. For this reason, since the third arm 13 is pulled outward via the first operating string 61, the third arm 13 moves away from the fourth arm 14. That is, the gap between the third arm 13 and the fourth arm 14 is increased.

  Next, the utility pole clamping tool 10 </ b> A is pushed into the utility pole 100 while the first operation unit 51 and the third operation unit 53 are held by the hot stick 91. Since the gap between the third arm 13 and the fourth arm 14 is large, the third arm 13 and the fourth arm 14 are easy to open. For this reason, the force required to push in the utility pole clamping tool 10A is smaller than in the above-described embodiment.

  Further, when the utility pole clamping tool 10A is pushed in, the first arm 11 and the second arm 12 come into contact with the protective sheet 8 as shown in FIG. For this reason, the first arm 11 and the second arm 12 open along the surface of the utility pole 100. Finally, as shown in FIG. 9, the utility pole clamping tool 10 </ b> A is a utility pole in which the protective sheet 8 is placed by the first arm 11, the second arm 12, the third arm 13 and the fourth arm 14 along the surface of the utility pole 100. 100.

  Instead of the first operation unit 51 and the third operation unit 53, the second operation unit 52 and the fourth operation unit 54 may be gripped. In such a case, since the fourth arm 14 is pulled outward via the second operation string 62, the fourth arm 14 moves away from the third arm 13. Further, either one of the third operation unit 53 and the fourth operation unit 54 may be omitted.

  As described above, the utility pole clamping tool 10A includes the third operation unit 53 and the first operation string 61. The third operation unit 53 is attached to the first operation unit 51. The first operation string 61 connects the third operation unit 53 and the third arm 13, and swings the third arm 13 according to the displacement of the third operation unit 53. Thereby, the clearance gap between the 3rd arm 13 and the 4th arm 14 is expanded previously by the 1st operation part 51 being gripped. For this reason, when the utility pole clamping tool 10A is pushed into the utility pole 100, the third arm 13 and the fourth arm 14 are easily opened. Therefore, the utility pole clamping tool 10A can facilitate the work of attaching the protective sheet 8.

  Furthermore, the utility pole clamping tool 10 </ b> A includes a fourth operation unit 54 and a second operation string 62. The fourth operation unit 54 is attached to the second operation unit 52. The second operation string 62 connects the fourth operation unit 54 and the fourth arm 14, and swings the fourth arm 14 according to the displacement of the fourth operation unit 54. Thereby, if any one of the 1st operation part 51 and the 2nd operation part 52 is hold | gripped, the clearance gap between the 3rd arm 13 and the 4th arm 14 will be expanded. For this reason, the operation | work which expands the clearance gap between the 3rd arm 13 and the 4th arm 14 previously becomes easier.

(Modification 2)
FIG. 12 is a side view showing a state in which the protective sheet according to Modification 2 is attached to the utility pole. 13 is a cross-sectional view taken along the line BB in FIG. Note that the same components as those described in the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 13, the protective sheet 8 </ b> A according to Modification 2 is a sheet having insulating properties and flexibility, and includes a first storage portion 81 and a second storage portion 82. The 1st accommodating part 81 is a bag-shaped member which can accommodate the 1st arm 11 and the 3rd arm 13 of the utility pole clamping tool 10, for example. The 2nd accommodating part 82 is a bag-shaped member which can accommodate the 2nd arm 12 and the 4th arm 14 of the utility pole clamping tool 10, for example. The first storage part 81 and the second storage part 82 are provided adjacent to each other. The protective sheet 8A includes two sets of adjacent first storage portions 81 and second storage portions 82, for example. The two sets of the first storage portion 81 and the second storage portion 82 are arranged so as to be positioned at both ends in the axial direction of the utility pole 100, for example, when the protective sheet 8A is wound around the utility pole 100, for example.

  Two utility pole clamping tools 10 are attached to the protective sheet 8A. The first arm 11 and the third arm 13 of the utility pole clamping tool 10 are inserted in the first storage part 81, and the second arm 12 and the fourth arm 14 are inserted in the second storage part 82. Thus, the protective sheet 8A has a curved shape along the first arm 11, the second arm 12, the third arm 13, and the fourth arm 14 before being wound around the utility pole 100. The protective sheet 8 </ b> A can be deformed following the operation of the utility pole clamping tool 10. That is, when the first arm 11 and the second arm 12 are opened, the protective sheet 8A is also opened following the first arm 11 and the second arm 12. When the third arm 13 and the fourth arm 14 are opened, the protective sheet 8A is also opened following the third arm 13 and the fourth arm 14.

  When the protection sheet 8A is attached to the utility pole 100, the protection sheet 8A is pushed into the utility pole 100 from the distal ends of the third arm 13 and the fourth arm 14. Then, the first arm 11, the second arm 12, the third arm 13, and the fourth arm 14 are opened and closed along the utility pole 100 as in the above-described embodiment. Since the protective sheet 8A opens and closes following the first arm 11, the second arm 12, the third arm 13, and the fourth arm 14, the protective sheet 8A is held by the utility pole 100 as shown in FIG. For this reason, according to the protective sheet 8A, compared with the above-described embodiment, the step of first winding the protective sheet around the utility pole 100 and holding it with a hot stick is omitted.

  As shown in FIG. 12, when the utility pole clamping tool 10 is moved in the axial direction of the utility pole 100 with the protection sheet 8 </ b> A attached to the utility pole 100, the protection sheet 8 </ b> A expands and contracts following the utility pole clamping tool 10. . Specifically, the protective sheet 8 </ b> A expands and contracts while loosening the portion sandwiched between the two utility pole clamping tools 10. For this reason, according to the protective sheet 8A, the adjustment of the area which covers the utility pole 100 becomes easy.

  Note that there may be three or more utility pole clamping tools 10 attached to the protective sheet 8A. Moreover, the utility pole clamping tool 10A shown in the first modification may be attached to the protective sheet 8A.

  As described above, the protective sheet 8A is an insulating and flexible sheet to which at least two utility pole clamping tools 10 (or utility pole clamping tools 10A) are attached. The protective sheet 8 </ b> A includes a first storage portion 81 that stores the first arm 11 and the third arm 13, and a second storage portion 82 that stores the second arm 12 and the fourth arm 14. Thereby, compared with embodiment mentioned above, the process of winding a protection sheet | seat around the utility pole 100 first and hold | maintaining with a hot stick is abbreviate | omitted. For this reason, the protective sheet 8A can facilitate the protective work of the utility pole 100 when performing the indirect hot wire work.

10, 10A Electric pole holding tool 11 First arm 12 Second arm 13 Third arm 14 Fourth arm 100 Electric pole 31 First connecting member 32 Second connecting member 33 Third connecting member 41 First elastic member 42 Second elastic member 43 3rd elastic member 51 1st operation part 52 2nd operation part 53 3rd operation part 54 4th operation part 61 1st operation string 62 2nd operation string 8, 8A Protection sheet 91, 92 Hot stick

Claims (7)

A curved first arm;
A second arm curved opposite to the first arm;
A first connecting member that connects one end of the first arm and one end of the second arm so that the first arm and the second arm can swing in a direction away from and closer to each other;
A first elastic member that applies forces in a direction approaching each other to the first arm and the second arm;
A third arm provided at the other end of the first arm;
A fourth arm provided at the other end of the second arm;
A second connecting member for connecting the other end of the first arm and one end of the third arm so that the third arm can swing in a direction away from and approaching the fourth arm;
A second elastic member that applies a force in a direction approaching the fourth arm to the third arm;
A third connecting member that connects the other end of the second arm and one end of the fourth arm so that the fourth arm can swing in a direction away from and approaching the third arm;
A third elastic member for applying a force in a direction approaching the third arm to the fourth arm;
A utility pole clamping tool comprising:   2. The device according to claim 1, wherein when the other end of the third arm and the other end of the fourth arm are pressed against a power pole, the third arm and the fourth arm swing in a direction away from each other. Electric pole clamping tool.   The utility pole clamping tool according to claim 2, wherein the other end of the third arm is disposed with a gap with respect to the other end of the fourth arm. A first operating portion provided in a direction different from the first arm from the first connecting member and interlocking with the first arm;
A second operating portion provided in a direction different from the second arm from the first connecting member, and interlocking with the second arm;
The utility pole clamping tool according to any one of claims 1 to 3, further comprising: A third operation unit attached to the first operation unit;
A first operating string that connects the third operating portion and the third arm, and swings the third arm according to displacement of the third operating portion;
The utility pole clamping tool according to claim 4, further comprising: A fourth operation unit attached to the second operation unit;
A second operating string that connects the fourth operating portion and the fourth arm, and swings the fourth arm in accordance with a displacement of the fourth operating portion;
The utility pole clamping tool according to claim 4 or 5, further comprising: A sheet having insulating properties and flexibility, to which at least two utility pole clamping tools according to any one of claims 1 to 6 are attached,
A first storage portion for storing the first arm and the third arm;
A second storage portion for storing the second arm and the fourth arm;
A protective sheet comprising:

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