JP4189333B2 - High pressure live wire retouching tool - Google Patents

Description

  The present invention relates to a tool for re-shaping or bending a live line in an indirect hot line operation, and more particularly to a tool used for an indirect hot line operation for a high-voltage underline.

  For example, in the construction of a high-voltage distribution line, a so-called reworking operation such as decrementing and squeezing to correct twisting of the distribution line is necessary. When this distribution line is a live wire, in order to perform indirect hot wire work safely and efficiently, for example, the operator grips the other end side of the insulating operation rod provided with a reattaching roller on one end side. Then, by appropriately operating, the roller is brought into contact with the distribution line.

  In such a conventional high-voltage live wire re-setting tool, for example, a groove portion having an arc-shaped cross section including an axial center is provided on the outer peripheral side so as to abut along a high-voltage live line such as the above-described high-voltage distribution line. However, some have a roller that can rotate around the axis and an insulating operation rod that supports the axis on one end side.

Further, as shown in FIG. 4, in the conventional high-pressure live line retooling tool, the four shaft portions (shaft centers) 120 at the one end side of the insulating operation rod 140 form four vertices of a substantially square shape. There are some which are arranged in a state parallel to. Each shaft portion 120 is provided so that the roller 100 can rotate independently. When an operator appropriately operates the insulating operation rod 140, the groove portion 160 of the roller 100 is in contact with the high-pressure live line while the shaft portion is in contact. By rotating around 120, the high-voltage live line can be corrected along its axis and re-combined. In this case, for example, any of the four rollers 100 may abut against the high-pressure live wire, or any two or more may abut together.
Japanese Patent No. 3385345

  However, since the conventional high-voltage live-line retooling tool is only for a relatively thick electric wire such as a high-voltage overhead wire, the curvature of the arc shape S formed by the cross section of the groove portion 160 of the roller 100 is relatively high. It was set to be relatively small to accommodate thick high-pressure live wires. As a result, for example, when a rectifying tool that can be applied to the high-voltage overhead wire is applied to the high-voltage underline 22, there is a possibility that the high-voltage underline 22 cannot be sufficiently re-wired. That is, as shown in FIG. 4B, the curvature of the arc shape S formed by the cross section of the groove portion 160 of the roller 100 is much smaller than the curvature of the substantially circular shape T formed by the cross section of the high pressure underline 22. Therefore, there is a possibility that play occurs at the contact position of the high-voltage underline 22 with respect to the width of the groove 160, that is, the width of the arc S, so that the correction along the axis of the high-voltage underline 22 by the groove 160 may be insufficient. there were. As a result, the indirect hot-line operation itself may be inaccurate and difficult, and the safety of the operation may be reduced.

  The present invention has been made in view of such problems, and the object thereof is to improve the accuracy, ease, and safety of indirect hot-wire work for relatively thin high-voltage hot wires such as high-voltage underlines. An object of the present invention is to provide a high-pressure hot-line re-tooling tool for improvement.

  The invention for solving the above-mentioned problems has a groove part on the outer peripheral side in which the cross section including the axis forms a concave shape so as to abut along the high-pressure live line, and a roller that can rotate around the axis, And a supporting member for supporting the shaft center at one end thereof, wherein the concave shape approximates the outer peripheral shape of the high-pressure live wire that comes into contact therewith.

  According to this high-pressure live line retooling tool, the concave shape formed by the cross section of the groove portion approximates the outer peripheral shape of the high-pressure live line that comes into contact therewith. Therefore, since the sufficient high frictional force can act between the high-pressure live wire and the groove portion, the high-pressure live wire can be corrected accurately and easily along the groove portion that rotates as the roller rotates. . In other words, since correction does not easily occur at the position of the high-pressure live line in the width of the concave shape, the correction becomes good. Accordingly, it is possible to accurately and easily change the relatively thin high-pressure live line such as a high-pressure underline. This also leads to the safety of indirect hot-line work.

  Moreover, in such a high-pressure live line re-setting tool, it is preferable that the concave shape is a substantially isosceles triangular shape with the apex portion being a substantially semicircular arc shape.

  According to this high-pressure live line re-setting tool, the central portion of the groove portion has a substantially semicircular arc shape. Therefore, if the outer peripheral shape of the high-pressure live wire is a substantially circular shape whose radius is substantially the same as the substantially semicircular arc shape, a sufficient frictional force acts between the high-pressure live wire and the central portion of the groove portion. Can do. As a result, the high-pressure live wire can be corrected accurately and easily along the groove that rotates as the roller rotates. Further, both side portions of the groove portion have a substantially isosceles triangle shape having the central portion as an apex angle portion. Therefore, if the high-pressure live line comes into contact with any one of the isosceles portions having a substantially isosceles triangle shape, the high-pressure live line is easily guided to the central portion. Accordingly, it is possible to efficiently refit the relatively thin high-pressure live line such as a high-pressure underline.

  For example, it is possible to provide a high-pressure live line retooling tool that improves the accuracy, ease, and safety of indirect hot-line work on relatively thin high-pressure live lines such as high-pressure underlines.

=== Configuration of high-pressure hot-wire squeezing tool ===
With reference to the drawings, the configuration of the high-pressure hot-wire re-setting tool of the present embodiment will be described.

  As shown in the front view (a) and the side view (b) of FIG. 1, the high-pressure hot-line retooling tool of this embodiment includes a roller 10 and a shaft portion that rotatably supports the roller 10. An insulating operation rod (support member) 14 provided with (axial center) 12 on one end side is a main component.

  The roller 10 is a disk having a groove portion 16 on the outer peripheral side, and the groove portion 16 has a concave shape in cross section including the shaft portion 12. The roller 10 of the present embodiment is made of acetal copolymer resin (POM) as a material, and thus has electrical insulation.

  The insulating operation rod 14 is made of a bar material having electrical insulation, and a flange (support member) to which a support piece (support member) 18 that supports the shaft portion 12 of the roller 10 is fixed on one end side of the bar material. ) 20 is detachably provided by appropriate means. Note that the length of the insulating operation rod 14 of the present embodiment is long enough for an operator who holds the end of the insulation operation rod 14 to abut the groove portion 16 of the roller 10 on the high-pressure live wire, for example. It shall have.

  As shown in FIG. 1, the center of the disk constituting the roller 10 is perforated, and the perforated portion 10 a is locked to the support piece 18 by the shaft portion 12. The inner diameter of the perforated portion 10a is a predetermined amount with respect to the outer diameter of the engaging portion of the shaft portion 12 so that the roller 10 is rotatably supported around the shaft portion 12 while being supported by the shaft portion 12. It is set large. The shaft portion 12 of the present embodiment is made of SUS304 stainless steel. Further, one end side of the shaft portion 12 made of stainless steel is welded and fixed to one end side of a support piece 18 which is also made of SUS304 stainless steel and forms a substantially rectangular plate shape. The other end of the support piece 18 is welded and fixed to a flange 20 made of SUS304 stainless steel.

  The cross section including the shaft portion 12 of the groove portion 16 in the roller 10 of the present embodiment has a concave shape composed of two different curvatures as shown in FIG. That is, the central portion 16a in the groove portion 16 has a substantially semicircular arc shape U, and the both side portions 16b form an isosceles triangle V having the central portion 16a as an apex portion.

  Based on the dimensions of each part of the roller 10 shown in the cross-sectional view of FIG. 2, the shape formed by the cross section of the groove 16 will be described in detail. For the roller 10 having a diameter D (120 mm) and a width w1, the groove 16 has a width w2 (approximately 25 mm) and a depth d1 (25 mm). The central portion 16a of the groove portion 16 has a substantially semicircular arc shape U in which a semicircular arc shape U1 having a radius r1 and a rectangular shape U2 having a width w3 and a depth d2 are combined. The isosceles triangular shape V formed by both side portions 16b of the groove portion 16 has a base portion having a length corresponding to the width w2 of the groove portion 16 and an apex angle Q. Thereby, the depth d3 of the both side portions 16b is represented by d1-d2-r1. The width w2 of the groove portion 16 of the roller 10 of the present embodiment is approximately the same as the width (about 29 mm) of the groove portion 160 of the roller 100 in the conventional high-pressure live line re-tooling tool shown in FIG. However, the depth d1 of the groove 16 of the roller 10 in the present embodiment is deeper than in the conventional case.

  Although not shown, the length of the support piece 18 of the present embodiment is 100 mm, and the substantial length of the support piece 18 obtained by subtracting from the 100 mm by the radius of the roller 10 is 40 mm. It is.

=== High pressure hot wire reworking operation ===
With reference to the drawings, the high-pressure hot wire reworking operation of the present embodiment will be described.

  As shown in the side view of FIG. 3 (a), a roller 10 of the high-voltage live line retooling tool of the present embodiment is in contact with a high-pressure underline 22 having a thickness less than the radius r1. And Such contact is realized, for example, by the operator pressing the insulating operation rod 14 (FIG. 1) to move the roller 10 in the direction of the arrow X in FIG.

  The high pressure underline 22 shown in FIG. 3A is in contact with one of the isosceles triangles V forming the both sides 16b of the groove 16 of the roller 10. From this state, when the operator further pushes the insulating operation rod 14 (FIG. 1) to move the roller 10 in the direction of the arrow X in FIG. 3A, the high-voltage underline 22 is guided to the isosceles portion. The relative position of the high-voltage underline 22 moves from the side portions 16b to the center portion 16a (in the direction of arrow Y in FIG. 3). That is, the groove portion 16 of the roller 10 is brought into contact with the high-pressure underline 22, and the distance is about 25 mm (d1) at maximum, and the insulating operation rod 14 (FIG. 1) is pressed lightly in the direction of the arrow X, so The underline 22 can be easily fitted into the central portion 16a which is the deepest portion of the groove portion 16.

  The high-voltage underline 22 shown in FIG. 3 (b) is in a state of being fitted into the central portion 16 a forming a substantially semicircular arc U in the groove portion 16 of the roller 10. While maintaining this state, the operator moves the insulating operation rod 14 in a direction along the high-voltage underline 22. A frictional force acting between the groove portion 16 and the high-pressure underline 22 forms a rotational moment with respect to the roller 10 with the shaft portion 12 as a fulcrum, and the roller 10 rotates around the shaft portion 12. As a result, the groove portion 16 also rotates around the shaft portion 12, and the high-voltage underline 22 can be corrected accurately and easily along the groove portion 16. That is, in the present embodiment, since the play is unlikely to occur at the position of the high-voltage underline 22 with respect to the central portion 16a in the vertical direction in FIG. Therefore, the high-voltage live line re-tooling tool according to the present embodiment can be accurately and easily re-shaped with respect to the high-voltage underline 22 that is thinner than the high-voltage overhead wire or the like. This also leads to the safety of indirect hot-line work.

=== Other Embodiments ===
The above-described embodiment is intended to facilitate understanding of the present invention, and is not intended to limit the present invention. The present invention is changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

  In the embodiment described above, the concave shape formed by the groove portion 16 is the substantially isosceles triangular shape V having the apex angle portion as the substantially semicircular arc shape U, but is not limited thereto. In short, any concave shape may be used as long as it approximates the outer peripheral shape of the high-voltage underline 22 so that a sufficient frictional force can act between the high-voltage underline 22 and the groove 22.

  In the above-described embodiment, the width (w2) of the groove 16 of the roller 10 is approximately 25 mm. However, the width is not limited to this, and may be approximately 19 mm, for example. However, the direction of 25 mm makes it easier to fit the high-voltage underline 22 into the central portion 16 a of the groove portion 16.

  Furthermore, in the above-described embodiment, the diameter (D) of the roller 10 is 120 mm and the depth (d1) of the groove is 25 mm, but the present invention is not limited to this. However, it is better that the diameter (D) of the roller 10 is relatively large and the depth (d1) of the groove 16 is relatively deep.

  In addition, in the embodiment described above, the length of the support piece 18 is 100 mm (substantially 40 mm). However, the length is not limited to this, and may be 115 mm (substantially 55 mm), for example. However, when it is set to 100 mm (40 mm), the high-pressure hot-wire repair tool is shortened, and the operability by the operator is further improved.

  In addition, in the above-described embodiment, the high-voltage live line is the high-voltage underline 22, but the present invention is not limited to this. However, the high-voltage live wire retouching tool of the present invention has the above-described special effect on a relatively thin high-pressure live wire such as the high-voltage underline 22.

(A) is a front view of the high-pressure hot-wire re-tooling tool of the present embodiment, (b) is a side view of the high-pressure hot-wire re-tooling tool of the present embodiment. It is sectional drawing of the roller of this Embodiment. It is a side view of the tool for a high-voltage underline and a high-pressure hot-wire re-setting in this Embodiment. (A) is a front view of the conventional high-pressure hot-wire rewarming tool, (b) is a side view of the roller of the conventional high-pressure hot-wire rewarming tool.

Explanation of symbols

10, 100 Roller 10a Perforated part 12, 120 Shaft part 14, 140 Insulating operation rod 16, 160 Groove part 16a Central part 16b Both side parts 18 Support piece 20 Flange 22 High-pressure underline

Claims (1)

In order to abut along the high-pressure live line, a groove portion having a concave cross section including the shaft center is provided on the outer peripheral side, and a roller that can rotate around the shaft center and the shaft center are indicated on one end side. A high-pressure hot-wire retooling tool comprising a support member,
The high-pressure hot-line retooling tool characterized in that the concave shape is a substantially isosceles triangle shape having a substantially semicircular arc shape, which is a combination of a semicircular arc shape and a rectangular shape, having an apex portion .

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