JP2017212788A - Supporting instrument for cutting cover of overhead wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an instrument for cover cut support of an overhead wire configured to support work using an electrical knife and capable of surely forming a cut in a circumferential direction of the overhead wire relatively to the covering of the overhead wire without requiring skills.SOLUTION: An instrument 1 for cover cut support of an overhead wire comprises: a first structure 4 including a blade portion mounting part 2 in which a blade portion 101 of a cutting tool is mounted; and a second structure 10 including an overhead wire placing part 3 on which an overhead wire 200 is placed. The overhead wire 200 is placed on the overhead wire placing part 3, the blade portion 101 is moved forwards between erection parts 51 and 52 of the blade portion mounting part 2 while abutting the back of the blade portion 101 to a concatenation part 53 of the blade portion mounting part 2, and the blade portion 101 is inclined obliquely downwards in a state where a blade of the blade portion 101 is brought into contact with a cover 202 of the overhead wire 200, such that the cover 202 is cut by the blade portion 101. Further, a cutting tool 100 and the instrument 1 for cover cut support of the overhead wire are rotated, such that a cut is formed on the cover 202 in a circumferential direction of the overhead wire 200.SELECTED DRAWING: Figure 8

Description

  This invention cuts along the circumference direction of an electric wire using the cutting tool which can be directly handled with the hand of an electrician knife etc. with respect to the insulation film of an aerial state electric wire which is covered with an insulating film on a core wire The present invention relates to an instrument for assisting the work with the cutting tool.

  For example, at the end or middle part of an electric wire with an insulation coating covered by the core wire, there may be a case where a part of the insulation coating is removed from the overhead electric wire by cutting the insulation coating along the circumferential direction of the electric wire. is there.

  And in the operation | work which removes a part of insulation coating from such an overhead electric wire, the electrical knife as shown, for example in patent document 1 is used as a cutting tool which can be handled directly by hand. The electric knife shown in Patent Document 1 is provided with a grip part that an operator grips with a hand and a blade part that protrudes from the grip part and cuts the covering of the electric wire. An operation of cutting the coating is performed by moving the blade portion in a direction to push out the electric wire from the side closer to the electric wire toward the side farther from the electric wire.

  On the other hand, instead of using a cutting tool such as an electric knife as shown in Patent Document 1, instead of attaching an electric wire covering removal tool shown in Patent Document 2 to an overhead electric wire, After moving the moving part close to the fixed part and cutting the blade into the insulation coating, operate the wire coating stripping tool indirectly with an indirect live wire work tool such as a bind hammer to center the wire. It is also known to make a cut along the circumferential direction of the electric wire with respect to the electric wire covering by rotating the electric wire covering stripping tool.

JP 2011-161080 A JP 2012-39750 A

  However, when the electric knife of Patent Document 1 is used, since the insulation coating of the electric wire is made of a material such as vinyl, the overhead electric wire covered with the insulation coating is slippery. It is difficult to cut the blade portion of the electric knife, and the inconvenience of repeatedly cutting the blade portion of the electric knife into the insulation coating of the overhead electric wire can be considered. Accordingly, in the electric knife of Patent Document 1, the blade portion of the electric knife cannot be overlapped and cut at the same position with respect to the insulation coating of the overhead wire, and the insulation coating of the overhead wire is arranged along the circumference of the wire. Another problem is that the wire cannot be cut cleanly. In addition, since the blade portion of the electric knife is not cut into the insulation coating of the overhead electric wire, the worker pulls the blade portion of the electric knife to his side, and as a result, the blade portion of the electric knife is insulated from the overhead wire. There is also a risk that an operator may injure such as a worker's limbs being cut by the blade portion of the electric knife by sliding on the surface of the coating.

  On the other hand, in the wire coating stripping tool shown in Patent Document 2, in order to cut the insulation coating in the circumferential direction of the overhead wire, an indirect hot wire working tool such as a bind hammer is operated. Since the work for rotating the wire coating stripping tool so as not to fall from the overhead electric wire is necessary, skill is required for cutting the insulation coating of the overhead wire. Furthermore, the electric wire covering stripping tool shown in Patent Document 2 can cope with high-voltage overhead electric wires (for example, OC electric wires and OE electric wires) covered with a coating made of a relatively hard material. In some cases, a low-voltage overhead electric wire (for example, a CV electric wire) covered with a soft material (such as vinyl) cannot be cut well.

  Therefore, the present invention is intended to assist the work with a cutting tool that can be directly handled by hand, and does not require skill in cutting work into the covering of the overhead electric wire, so that the overhead electric wire is covered with the covering of the overhead electric wire. It is an object of the present invention to provide a device for assisting in cutting of an overhead wire that prevents the blade from slipping on the surface of the overhead wire's sheath and causing injury to the operator by reliably cutting in the circumferential direction of the wire. It is said.

  In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that the cutting of the overhead electric wire by the blade portion of the cutting tool having a blade edge and a blade portion having a spine located on the opposite side of the blade edge is performed. An auxiliary device for cutting and covering an overhead wire for assisting, comprising a blade portion mounting portion and an overhead wire mounting portion, wherein the blade portion mounting portion has the blade portion of the cutting tool facing upward. Two standing parts arranged between them, and a connecting part that connects the two standing parts at the upper end side of the standing parts and can contact the back of the blade part from above. The overhead electric wire placing portion has a placing portion main body that is disposed below the standing portion of the blade portion mounting portion and can contact the overhead electric wire from below. The cutting tool is, for example, an electric knife.

  As a result, the overhead wire is placed on the mounting body of the overhead wire mounting portion, the cutting tool is placed between the standing portions of the blade portion mounting portion, the blade portion is in contact with the connecting portion of the blade portion mounting portion, and the blade edge of the blade portion After mounting at least in contact with the overhead wire, tilt the tip of the cutting tool downward with the spine of the blade in contact with the connecting portion, and cover the cutting tool blade with the overhead wire. Cut the cutting tool and the overhead wire covering / cutting auxiliary tool relative to the overhead wire (by rotating about one turn), so that the overhead wire is covered in the circumferential direction of the overhead wire. Cut along.

  In the invention according to claim 2, the blade portion mounting portion includes the two standing portions and the connecting portion that connects the two standing portions to each other at the upper end side of the standing portion. A first structural body having a main body member having a connecting member coupled to the main body member, and the overhead electric wire mounting portion is separate from the first structural body, and A second structure having two outer standing plate portions respectively disposed outside the two standing portions of the member, and the mounting portion main body connecting the two outer standing portions; The first structure is pressed against the second structure by the position adjusting means at a plurality of locations so that the distance of the connecting portion from the mounting portion main body can be adjusted. It is attached to the second structure.

  Thereby, by changing the attachment position of the first structure to the second structure while adjusting the distance from the mounting portion main body of the second structure of the connecting portion of the first structure, Even if the diameter of the overhead wire and the dimensions of the cutting tool blade from the back side to the cutting edge are diverse, place the overhead wire on the mounting body of the overhead wire mounting part and place the cutting tool on the blade mounting part. It can be mounted between the parts with the back part in contact with the connecting part of the blade part mounting part and the blade part at least in contact with the overhead electric wire.

  In the invention according to claim 3, as the position adjusting means, the first structure body is configured to move the second structure from a position close to the connecting portion side end of the standing portion of the main body member. A first projecting portion that extends to the outer standing portion side of the structure and contacts an inner surface of any of the plurality of concave portions provided on the standing surface opposite to the overhead electric wire side of the outer standing portion; After the connecting member is inserted from the main body, a second hole extending in the vertical direction of the outer standing portion of the second structure is further inserted and protrudes outward from the second structure. The projecting portion and a portion of the standing member of the main body member that extends from a position close to the end opposite to the connecting portion to the second structure side and is opposite to the overhead wire of the overhead wire mounting portion. A third protrusion contacting the elevation surface, and the three protrusions are provided with elastic means. The first protrusion of the first structure presses the outer standing portion of the second structure from the side opposite to the overhead wire to the overhead wire side, and The third projecting portion presses the overhead wire mounting portion of the second structure body from the side opposite to the overhead wire to the overhead wire side. The elastic means is, for example, a coil spring.

  As a result, even if the concave portion of the outer standing portion that is in contact with the first protruding portion is changed to an upper concave portion or a desired concave portion located below the initial concave portion, the first protruding portion is the desired one. Since it will be in the state which pressed the inner surface of this recessed part, the 1st structure can maintain the state attached to the 2nd structure.

  In the invention according to claim 4, each of the two outer standing portions of the second structure has a plate-like contact portion that contacts a side surface of the blade portion of the cutting tool. It is characterized by that.

  Thereby, the range in which the outer standing portion of the second structure abuts against the side surface of the blade portion of the cutting tool becomes relatively large, so that the cutting tool can be held in a more stable state.

  As described above, according to the present invention, the overhead wire is mounted on the mounting body of the overhead wire mounting portion, the cutting tool is connected between the standing portions of the blade portion mounting portion, and the back of the blade portion is connected to the blade portion mounting portion. After mounting with the blade edge of the cutting tool touching at least the overhead wire, the tip of the cutting tool is tilted downward with the back of the blade in contact with the connecting portion. By cutting the blade part into the sheath of the overhead wire and rotating the cutting tool and the tool for assisting in cutting the overhead wire as they are (around one turn), the sheath of the overhead wire is removed. It can cut along the circumferential direction. Therefore, since the cutting can be made with certainty by tilting the cutting tool with respect to the covering of the overhead electric wire, there is no risk that the worker will be injured in the cutting work on the covering of the overhead electric wire, and skill in the operation is also reduced. No longer needed.

  In particular, according to the invention described in claim 2, the attachment position of the first structure to the second structure is set such that the connecting portion of the first structure is a distance from the mounting portion main body of the second structure. Even if the diameter of the overhead wire and the dimensions of the cutting tool blade from the back side to the cutting edge are varied, the overhead wire is placed on the mounting body of the overhead wire mounting part, and the cutting tool Can be mounted between the standing portions of the blade mounting portion with the back portion in contact with the connecting portion of the blade mounting portion and the blade portion at least in contact with the overhead electric wire.

  In particular, according to the invention described in claim 3, after changing the concave portion of the outer standing portion with which the first projecting portion is in contact with the initial concave portion, the upper concave portion or the desired concave portion located below, Since the 1st protrusion part will be in the state which pressed the inner surface of this desired recessed part, it is possible to prevent that a 1st structure body remove | deviates from a 2nd structure body.

  In particular, according to the fourth aspect of the invention, the range in which the outer standing portion of the second structure abuts against the side surface of the blade portion of the cutting tool is relatively large, so that the blade portion of the cutting tool is stabilized. Since it can hold | maintain in a state, it is possible to prevent malfunctions, such as the blade part of a cutting tool entering diagonally into the coating | cover of an overhead electric wire.

FIG. 1 shows the structure of an overhead wire covering / cutting assisting device according to Embodiment 1 of the present invention. FIG. 1 (a) is a side view of the overhead wire covering / cutting assisting device, and FIG. ) Is a rear view of the instrument for assisting in cutting of the overhead wire. FIG. 2 is a rear view of the overhead electric wire covering / cutting auxiliary device of the first embodiment showing a state where the overhead electric wire is placed and the cutting tool is mounted. FIG. 3 is a rear view of the overhead wire covering / cutting assisting device of the first embodiment showing a process of tilting the tip of the blade portion of the cutting tool after placing the overhead wire and mounting the cutting tool. FIG. 4 shows the configuration of the first structure constituting the device for assisting in cutting the overhead wire of Example 2 of the present invention, and FIG. 4 (a) is a side view of the first structure, FIG. 4B is a rear view of the first structure. FIG. 5 shows the configuration of the second structure constituting the device for assisting in cutting the overhead wire of Example 2 of the present invention. FIG. 5 (a) is a side view of the second structure, FIG. 5B is a rear view of the second structure. FIG. 6 shows the overall configuration of the overhead wire covering / cutting assisting device according to Embodiment 2 of the present invention. FIG. 6 (a) is a side view of the entire overhead wire covering / cutting assisting device. FIG.6 (b) is a rear view of the whole side view of the apparatus for auxiliary | assistant cutting of the said overhead wire. FIG. 7 is a rear view of the overhead wire covering / cutting auxiliary device of the second embodiment showing a state in which the overhead wire is placed and a cutting tool is mounted. FIG. 8 is a rear view of the overhead wire covering / cutting auxiliary device of the second embodiment showing a process of inclining the tip of the blade portion of the cutting tool after placing the overhead wire and mounting the cutting tool.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 3 show an embodiment 1 of an auxiliary instrument for covering cutting of an overhead electric wire (hereinafter referred to as an auxiliary instrument for covering cutting) 1 according to the present invention.

  This auxiliary tool 1 for covering and cutting is used in an operation of making a cut in the covering 202 of the overhead electric wire 200 that is in an aerial state and includes the core wire 201 and the covering 202 that covers the core wire 201. It is used as an auxiliary tool for the cutting tool 100 including the grip portion. The cutting tool 100 is called, for example, an electric knife. The blade portion 101 of the cutting tool 100 has a sharply sharp blade edge for cutting an object and a spine located on the opposite side of the blade edge. About these points, the cutting tool 100 and the overhead electric wire 200 shown in Example 2 described below are also the same.

  The auxiliary tool 1 for covering and cutting according to the first embodiment has a blade portion mounting portion 2 and an overhead wire placing portion 3 formed integrally.

  In the first embodiment, the blade portion mounting portion 2 includes, in use, two rod-like standing portions 21 and 22 that extend vertically from the back side of the blade portion 101 toward the blade tip, and the standing portion. 21 and 22 and a substantially inverted U-shaped bar-shaped connecting portion 23 connected to each end.

  In the first embodiment, the inner width L1 of the connecting portion 23 near the top of the connecting portion 23 is substantially the same as the thickness of the blade portion 101, and the back portion of the blade portion 101 is the inner peripheral surface of the connecting portion 23. Of these, the blade portion 101 can be held by coming into contact with both side surfaces of the blade portion 101 when contacting the inner peripheral surface 23a opposite to the top portion side. However, although not shown, the inner width between the standing portions 21 and 22 may be substantially the same as the thickness of the blade portion 101.

  In the first embodiment, the overhead wire placing portion 3 is located on the side opposite to the connecting portion 23 of the blade portion mounting portion 2, that is, below the blade portion mounting portion 2 in use. There are two mounting portion bodies 31, 32, 33 and two connection portions 34, 35.

  The mounting body 31, 32, 33 is a rod-like body, has an arc shape when viewed from the side (axial direction of the overhead wire 200), and is viewed from the front or rear (side of the overhead wire 200). It is substantially U-shaped.

  The end of the mounting portion main body 31 on the side of the mounting portion main body 32, the end of the mounting portion main body 32 on the side of the mounting portion main body 31, the end of the mounting portion main body 32 on the side of the mounting portion main body 33, and the end of the mounting portion main body 33 on the side of the mounting portion main body 32. Has been. The end of the mounting portion main body 31 opposite to the mounting portion main body 32 is connected to the connecting portion 34, and the end of the mounting portion main body 33 opposite to the mounting portion main body 32 is connected to the connecting portion 35. Further, the end of the connecting portion 34 opposite to the mounting portion main body 31 is connected to the lower end of the standing portion 21, and the end of the connecting portion 35 opposite to the mounting portion main body 33 is connected to the lower end of the standing portion 22. Yes. Thereby, the mounting part main body 32 of the overhead electric wire mounting part 3 is in a state of being detached from a position where the blade part 101 of the cutting tool 100 can swing, so that the swinging blade part 101 does not hit.

  The dimension from the inner peripheral surface 23a of the blade part mounting part 2 to the upper surface of the mounting part main body 32 is the sum of the dimension from the back side of the blade part 101 of the predetermined cutting tool 100 to the blade edge and the diameter of the predetermined overhead wire 200. It is almost the same. That is, the covering cutting aid 1 of Example 1 has a dimension from the inner peripheral surface 23a of the blade mounting portion 2 to the upper surface of the mounting portion main body 32 depending on the size and type of the cutting tool 100 and the diameter of the overhead electric wire 200. Although a different thing may be prepared, since the structure of the auxiliary | assistant instrument 1 for covering cutting is relatively simple, there is no problem in the manufacturing cost of the auxiliary instrument 1 for covering cutting.

  As a result, the overhead electric wire 200 is placed on the overhead electric wire placing portion 3, and the blade portion 101 of the cutting tool 100 is placed between the standing portions 21, 22 while the back thereof is in contact with the inner peripheral surface 23 a of the connecting portion 23. 2 and 3, the blade portion 101 of the cutting tool 100 is in a state where the blade edge is in contact with the coating 202 of the overhead electric wire 200 or slightly cut.

  Then, the handle side (not shown) of the cutting tool 100 is lifted in the direction of the arrow in FIG. 3 while maintaining the state in which the blade 101 of the cutting tool 100 is in contact with the inner peripheral surface 23a of the connecting portion 23. However, as indicated by the imaginary line in FIG. 3, the cutting tool 100 swings obliquely downward with respect to the edge A on the handle side of the cutting tool 100 on the inner peripheral surface 23 a, and the cutting edge of the blade portion 101. Is cut into the covering 202 of the overhead electric wire 200. Therefore, in this state, the cutting tool 100 and the covering / cutting auxiliary instrument 1 are rotated in the circumferential direction of the overhead electric wire 200 with respect to the overhead electric wire 200, thereby extending along the circumferential direction of the overhead electric wire 200 and the core wire 201. A notch up to the surface is formed, and only the coating 202 can be peeled off.

  4 to 8 show a second embodiment of the covering / cutting auxiliary device 1 according to the present invention. The auxiliary tool 1 for covering and cutting is provided with a first structure 4 having a blade mounting portion 2 and a second structure 10 having an overhead wire mounting portion 3, and the first structure 4. The second structure 10 is a separate member.

  As shown in FIG. 4, the first structure 4 further includes a main body member 5 and two connecting members 6 and 7.

  In use, the main body member 5 includes two plate-like standing portions 51 and 52 that extend vertically from the back side of the blade portion 101 toward the blade edge, and one end of the standing portions 51 and 52. It has a substantially inverted U-shaped block-like connecting portion 53 that is connected to each other. In this embodiment, the connecting portion 53 has a configuration in which one end side portion of the standing portions 51 and 52 extends obliquely upward and has an upper portion thereof.

  In Example 2, the inner width dimension L2 between the standing portion 51 and the standing portion 52 is substantially the same as the thickness of the blade portion 101 of the cutting tool 100, and the inner peripheral surface of the connecting portion 53. 53a can contact | abut the spine of the blade part 101 of the cutting tool 100. FIG. As shown in FIG. 4A, the standing portions 51 and 52 have a width that is lower than a portion near the inner peripheral surface 53 a of the connecting portion 53 at a portion lower than the inner peripheral surface 53 a of the connecting portion 53. Wide plate-like contact portions 51a and 52a. Accordingly, when the blade portion 101 of the cutting tool 100 is mounted between the standing portions 51 and 52, the range of contact with the side surface of the blade portion 101 is relatively wide. Can be held from.

  In this embodiment, the standing portions 51 and 52 have extending portions 51b and 52b extending obliquely upward from the contact portions 51a and 52a on the side opposite to the connecting portion 53, and the extending portions 51b and 52b. Columnar protrusions 54 and 55 extending from the outer side to the outer side (in the axial direction of the overhead electric wire 200). Further, the standing portions 51 and 52 are located on the lower side of the contact portions 51a and 52a and on the side of the connecting portion 53 with respect to the projecting portions 54 and 55. It has cylindrical protrusions 56 and 57 extending in the axial direction.

  The connecting members 6 and 7 are straight plate-like members in the second embodiment, and at one end in the longitudinal direction, through holes 61 and 71 through which the protruding portions 56 and 57 are inserted are formed. The other end of each has columnar protrusions 58 and 59 extending outwardly (in the axial direction of the overhead electric wire 200).

  The main body member 5 and the connecting members 6 and 7 are assembled by inserting the protruding portions 56 and 57 of the main body member 5 into the through holes 61 and 71 of the connecting members 6 and 7. Further, the winding portions 301 of the coil spring 300 are attached to the protruding portions 56 and 57 inserted into the through holes 61 and 71, and both sides of the coil spring 300 are linearly extended so that the linear portions 302 and 303 are formed. At the same time, the ends of the linear portions 302 and 303 are fixed to the protrusions 54 and 55 and the protrusions 58 and 59. The ends of the linear portions 302 and 303 of the coil spring 300 are not only connected to the protrusions 54 and 55 and the protrusions 58 and 59 but also around the protrusions 54 and 55 and the protrusions 58 and 59. You may connect after winding.

  By adopting such a configuration, when the blade portion 101 of the cutting tool 100 is mounted between the standing portions 51 and 52, the first structural body 4 has the protruding portions 54 and 55 at the tip of the blade portion 101. And the protrusions 58 and 59 are also urged toward the tip of the blade 101. However, it is not limited to the coil spring 300, and any elastic means (a single-member elastic member or an elastic mechanism composed of a plurality of members) that can exhibit the urging function may be used.

  As shown in FIG. 5, in the second structure 10, the overhead wire placing portion 3 for placing the overhead wire 200 and the position adjusting portion 8 disposed above the overhead wire placing portion 3 are integrally formed. It is formed.

  The configuration of the overhead wire placing portion 3 is the same as that of the overhead wire placing portion 3 shown in the first embodiment, and is composed of three placing portion main bodies 31, 32, 33 and two connection portions 34, 35. . Since the details of the configuration of the overhead wire mounting portion 3 have already been described in the first embodiment, the description thereof is omitted in the second embodiment.

  The position adjustment unit 8 includes plate-like outer standing portions 81 and 82 that are located outside the standing portions 51 and 52 of the first structure 4 when assembled with the first structure 4; It has the connection part 83 which connects the outer standing part 81 and 82 at the upper end. The lower ends of the outer standing portions 81 and 82 are connected to the connection portions 34 and 35 of the overhead electric wire placing portion 3.

  Furthermore, the substantially semicircular recessed part with which the protrusion parts 54 and 55 of the 1st structure 4 can engage with the side part on the opposite side to the blade part 101 of the cutting tool 100 of the outer standing parts 81 and 82 is provided. A plurality of 84 are arranged vertically. Furthermore, the outer standing portions 81 and 82 are formed with through holes 85 and 86 into which the protruding portions 56 and 57 of the first structure 4 can be inserted, and these through holes 85 and 86 are formed in the width direction. Long holes are formed in the vertical direction.

  Next, after the first structure 4 is configured, the first structure 4 and the second structure 10 are assembled, and the position adjustment procedure of the first structure 4 is based on FIG. I will explain.

  After the protruding portions 56 and 57 of the main body member 5 are inserted into the through holes 61 and 71 of the connecting members 6 and 7, the winding portions of the coil spring 300 are mounted on the protruding portions 56 and 57, and the coil springs are connected to the protruding portions 54 and 55. The first structural body 4 is configured by fixing the linear portion 302 of 300 and fixing the linear portion 303 of the coil spring 300 to the protrusions 58 and 59.

  Next, the protrusions 56 and 57 of the first structure 4 are inserted into the through holes 85 and 86 of the outer standing portions 81 and 82 of the second structure 10 and the protrusions of the first structure 4 are inserted. 54 and 55 are engaged with any one of the concave portions 84 of the second structure 10, and the protrusions 58 and 59 of the first structure 4 are set up outwardly from the connection portions 34 and 35 of the second structure 10. It is made to contact between the parts 81 and 82.

  As a result, the protrusions 54 and 55 of the first structure 4 press the outer standing portions 81 and 82 while engaging the recesses 84 of the second structure 10, and the protrusion of the first structure 4. Since the portions 58 and 59 press the connection portions 34 and 35 of the second structure 10, the first structure 4 and the second structure 10 are pressed at two points and firmly assembled to each other. It will be in the state.

  Then, from the state in which the first structure 4 and the second structure 10 are assembled, the connecting portion 53 of the main body member 5 is shown on the right side of the figure as indicated by the arrow in FIG. By moving up and down while moving to the (second structure 10 side), the state where the protrusions 54 and 55 of the first structure 4 are engaged with the recess 84 is released, so the protrusions 54 and 55 Is removed from the recess 84 and engaged with another recess 84. At this time, since the through holes 85 formed in the outer standing portions 81 and 82 of the second structure 10 are elongated holes extending vertically, the protrusions 56 and 57 inserted through the through holes 85 are also included. The inside of the through-hole 85 is displaced up and down. Then, by releasing the hand from the connecting portion 53 of the main body member 5, the protruding portions 54 and 55 also return to the state where they are engaged with the desired concave portion 84 while pressing the second structure 10. The first structure 4 and the second structure 10 are firmly assembled with each other.

  Thereby, even if the size and type of the cutting tool 100 and the diameter of the overhead electric wire 200 are various, it is possible to cope with one covering cutting auxiliary tool 1.

  With reference to FIGS. 7 and 8, the procedure for cutting the overhead wire 200 in the circumferential direction with respect to the covering 202 of the overhead wire 200 by the blade portion 101 of the cutting tool 100 will be described.

  First, the overhead electric wire 200 is placed on the overhead electric wire placing portion 3, and the blade portion 101 of the cutting tool 100 is placed between the standing portions 51, 52 while the spine is in contact with the inner peripheral surface 53 a of the connecting portion 53. By passing through, the blade portion 101 of the cutting tool 100 comes into contact with the sheath 202 of the overhead electric wire 200 or is slightly cut as shown by the solid line in FIGS.

  Next, the unillustrated handle side of the cutting tool 100 is lifted in the direction of the arrow in FIG. 8 while maintaining the state in which the blade portion 101 of the cutting tool 100 is in contact with the inner peripheral surface 53a of the connecting portion 53. However, as indicated by an imaginary line in FIG. 8, the cutting tool 100 swings obliquely downward with respect to the edge B on the handle side of the cutting tool 100 on the inner peripheral surface 53 a as a reference, and the cutting edge of the blade portion 101. Is cut into the covering 202 of the overhead electric wire 200. Therefore, in this state, the cutting tool 100 and the covering / cutting auxiliary instrument 1 are rotated in the circumferential direction of the overhead electric wire 200 with respect to the overhead electric wire 200, thereby extending along the circumferential direction of the overhead electric wire 200 and the core wire 201. A notch up to the surface is formed, and only the coating 202 can be peeled off.

  According to the above, in both Example 1 and Example 2, the back of the blade part 101 of the cutting tool 100 is in contact with the inner peripheral surfaces 23a, 53a of the connecting parts 23, 53 of the overhead wire covering / cutting auxiliary instrument 1. In this state, the blade tip of the blade portion 101 is surely cut into the covering 201 of the overhead electric wire 200 only by tilting the cutting tool 100, so that no skill is required for the work, and the worker may be injured. Absent.

DESCRIPTION OF SYMBOLS 1 Auxiliary instrument for covering cutting of an overhead electric wire 2 Blade portion mounting portion 21, 22 Standing portion 23 Connecting portion 3 Overhead wire placing portion 4 First structure 5 Main body member 51, 52 Standing portion 51a, 52a Contact portion 54 , 55 Protruding part 56, 57 Protruding part 58, 59 Protruding part 6 Connecting member 8 Position adjusting part 84 Recessed part 85, 86 Through hole 10 Second structure 100 Cutting tool 101 Blade part 200 Overhead electric wire 201 Core wire 202 Covering 300 Coil spring

Claims (4)

An auxiliary tool for cutting and covering an overhead wire for assisting the cutting of the sheath of the overhead wire by the blade portion of a cutting tool having a blade portion and a blade portion having a spine located on the opposite side of the blade edge,
It has a blade mounting part and an overhead wire mounting part,
The blade mounting portion is configured such that the blade portion of the cutting tool is connected between the two standing portions arranged between the back and the two standing portions at the upper end side of the standing portion. And a connecting part that can contact the back of the blade part from above,
The overhead electric wire covering portion has a mounting portion main body which is disposed below the standing portion of the blade portion mounting portion and can come into contact with the overhead electric wire from below. Auxiliary equipment for cutting. The blade portion mounting portion is connected to the main body member, the main body member having the two standing portions, and the connecting portion that connects the two standing portions to each other at the upper end side of the standing portion. A first structure having a connecting member;
The overhead electric wire placing part is a separate body from the first structure, and two outer standing plate parts respectively disposed outside the two standing parts of the first member; It is provided as a second structure having the mounting portion main body connecting the two outer standing portions,
The first structure body is pressed by the second structure body at a plurality of locations by the position adjusting means so that the distance of the connecting portion from the mounting portion main body can be adjusted. The auxiliary device for cutting and covering an overhead electric wire according to claim 1, wherein the auxiliary device is attached to the second structure.   As the position adjusting means, the first structure extends from the position close to the connecting portion side end of the standing portion of the main body member to the outer standing portion side of the second structure, and extends to the outside. A first projecting portion in contact with an inner surface of any of a plurality of recesses provided on an elevation surface opposite to the overhead electric wire side of the standing portion, and after inserting the connecting member from the main body portion, A second projecting portion projecting outward from the second structure through a long hole extending in the vertical direction of the outer standing portion of the second structure, and among the standing portions of the main body member A third projecting portion extending from the position near the end opposite to the connecting portion to the second structure side and contacting the vertical surface of the overhead wire mounting portion opposite to the overhead wire; These three protrusions are provided with elastic means so that the first protrusions of the first structure are in front. The outer standing portion of the second structure is pressed from the side opposite to the overhead electric wire toward the overhead electric wire, and the third protrusion of the first structure is the second protrusion of the second structure. The auxiliary device for covering cutting of an overhead electric wire according to claim 2, wherein the overhead electric wire placing portion is pressed from the opposite side of the overhead electric wire to the overhead electric wire side.   The said 2 outer side standing part of a said 2nd structure has a plate-shaped contact part which contact | connects the side surface of the blade part of the said cutting tool, respectively. Auxiliary equipment for covering cutting of overhead electric wires according to any one of the above.

Images