Rod-shaped extendable device

Abstract

Provided is a rod-shaped extendable device that can have a certain strength while being reduced in weight.　A rod-shaped extendable device 10 according to the present invention comprises: a fixed body 12; an extendable body 14 coupled to a cylindrical inner surface portion 24b of the fixed body 12 so as to be movable in the longitudinal direction; and a reciprocating shaft 16 provided on the axis of the fixed body 12, the extendable body 14 moving in a non-rotating state inside the fixed body 12 in the longitudinal direction as the reciprocating shaft 16 rotates, the rod-shaped extendable device 10 being characterized by that the fixed body 12 and / or the extendable body 14 has a strengthening section, which increases the strength against bending, above and / or below in the vertical direction in a region close to the opposing surface.

Description

[Technical field]

[0001] The present invention relates to a rod-shaped extension tool, and more particularly to a rod-shaped extension tool for live-line distribution tools suitable for use in uninterrupted work such as in the installation and maintenance of electric wires. [Background technology]

[0002] If switches and other equipment are not installed during distribution line construction, etc., long-term power outages will be unavoidable even if the construction work is not carried out in the area.

[0003] To solve such problems, uninterrupted construction has been performed. In uninterrupted construction, electric wires are cut on both sides of the construction area, and the cut ends of the electric wires on the outside of the construction area are connected with a bypass cable to maintain a live line state, and only the construction area is in a power outage state. As a tool used in this type of construction, a rod-shaped expandable live line distribution tool that divides and separates the cut ends is known (see, for example, Patent Document 1).

[0004] The rod-shaped telescopic device of this live line distribution tool is basically composed of a main body a having a cylindrical portion d, and a telescopic cylinder b fitted in the cylindrical portion d so as to be freely telescopic and slidable. The main body a has a cylindrical portion d made of FRP connected and fixed to a main body case c made of aluminum alloy, and bevel gears f and g whose axes are perpendicular to each other are arranged in the main body case c in a rotatably supported meshed state. One end of a screw shaft h arranged on the axis of the cylindrical portion d is fixed to the bevel gear f whose axis coincides with the axis of the cylindrical portion d. The other bevel gear g is fixed to one end of a rotating operation shaft j that penetrates an aluminum alloy cover i that closes an opening formed on one side of the main body case c, and an engagement ring k is attached to the other end protruding outside of this rotating operation shaft j for engaging with a remote control device (not shown) to rotate it.

[0005] A cap l made of Duracon is fitted and fixed to the tip of the cylindrical part d, and the telescopic cylinder b is supported so as to pass through the cap l and slide freely. The telescopic cylinder b is made of FRP, and a nut member m that screws into the screw shaft h is fixed to one end of the telescopic cylinder b. The telescopic cylinder b is arranged so that it can be extended and slid by the rotation of the screw shaft h. An ABS resin key n is attached to the outer circumferential surface of the telescopic cylinder b along the axial direction, and the key n engages with the cap l to form a rotation stop for the telescopic cylinder b. A cap o is fitted and fixed to the tip of the telescopic cylinder b. Hooks p and q for connecting to a chuck that grips a distribution line are attached to the main body case c and the cap o, respectively.

[0006] The chucks connected to the hooks p and q grip both sides of the distribution line to be cut, and may be directly connected to the main case c and the cap o. In this state, the bevel gear g is rotated by the remote control device engaged with the engagement ring k, and the telescopic cylinder b is retracted into the cylindrical part d, so that the live distribution line on both sides of the work section can be pulled to the side between the two gripping parts. This allows the live distribution line in both gripping parts to be stabilized in a slack state while maintaining the tension of the outer electric wire. As a result, even if the live distribution line is cut between the two gripping parts, the tension of the distribution line on both sides can be maintained. The cutting of the live distribution line is safely performed using an insulated remote cutting tool. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 8-331723 Summary of the Invention [Problem to be solved by the invention]

[0008] The rod-shaped extension of this sorting tool is used in the construction of electric wires located at high places, and it is necessary to lift it from the ground to a high place. Therefore, it needs to be lightweight to make the work easier, but it also needs to have a certain strength because very strong forces are applied during the construction. Therefore, a primary object of the present invention is to provide a rod-shaped stretchable device that can be made lightweight while maintaining a certain level of strength. [Means for solving the problem]

[0009] In order to solve the above problems, the rod-shaped telescopic device of the present invention is a live line distribution tool comprising a fixed body, a telescopic body connected to the cylindrical inner surface of the fixed body so as to be freely movable in the longitudinal direction, and a reciprocating shaft disposed on the axis of the fixed body, and when the reciprocating shaft rotates, the telescopic body moves in the longitudinal direction within the fixed body in a non-rotating state. The fixed body and / or the expandable body are characterized in that in an area close to the opposing faces, above and / or below in the vertical direction, there is a strength portion that enhances strength against bending.

[0010] The expandable body is a rod-shaped body with an elliptical cross section, the long axis passing through the center of the ellipse extending vertically, and is formed to enhance strength against bending.

[0011] The reinforcing portion formed on the fixed body and / or the expandable body comprises a groove portion formed on one side of the fixed body and a ridge portion formed on the other side of the expandable body disposed inside the fixed body in a region where the fixed body and the expandable body face each other, The groove portion has a slope extending from its groove bottom that is arc-shaped in cross section, and the peak portion has a slope extending from its peak that is arc-shaped in cross section, and the groove portion and the peak portion are configured to face each other and abut against each other.

[0012] The strength portion formed on the fixed body and / or the expandable body is characterized by being composed of at least one pair of groove and ridge portions formed so as to restrict rotation of the expandable body around its axis.

[0013] The stretchable body includes a strength portion and a long axis portion extending from a rear end of the strength portion, The strength portion and / or the long axis portion is configured by a groove portion or a ridge portion in a region where the fixed body and the expandable body disposed inside the fixed body face each other.

[0014] The stretchable body includes a strength portion and a long axis portion extending from a rear end of the strength portion, The telescopic body has a nut arranged on the long shaft portion concentrically with the axis of the cylindrical body, and the nut has a ridge or groove portion that constitutes a strength portion in the area facing the fixed body.

[0015] The nut is characterized in that the ridge portion or the groove portion constituting the anti-rotation portion is formed on the surface facing the fixed body, and is screwed onto a screw shaft constituting the long shaft portion on the opposite side to the direction of extension.

[0016] The strength portion formed on the fixed body and / or the expandable body constitutes a rotation prevention portion, The anti-rotation portion is The fixing member has an inner wall surface and an outer ridge portion formed on the inner wall surface of the fixing member. The fixing member has an inner wall surface and an outer ridge portion formed on the inner wall surface of the fixing member. Or, The fixing member is characterized in that it is constituted by an inward ridge portion formed on the inner wall surface of the fixing member, and an outward groove portion formed on the surface facing the inner wall surface of the fixing member.

[0017] The device comprises a fixed body, a telescopic body fitted in a hollow portion of the fixed body so as to be freely movable in the longitudinal direction, and a reciprocating shaft disposed on an axis of the fixed body, a strength portion disposed on the axis of the fixed body and formed on a long axis portion of the expandable body, and when the reciprocating shaft rotates, the expandable body moves and expands in the longitudinal direction within the hollow portion of the fixed body in a rotation-stopped state, the reinforcing portion is formed in a region where the fixed body and the expandable body disposed inside thereof face each other, the reinforcing portion being composed of a groove portion formed on one side thereof and a ridge portion formed on the other side thereof, The groove portion has a slope extending from the bottom of the groove that is arc-shaped in cross section, and the peak portion has a slope extending from the top of the peak that is arc-shaped in cross section, and the groove portion and the peak portion are in contact with each other facing each other and are formed to regulate rotation of the expandable body around its axis, characterized in that the groove portion and the peak portion are formed as at least one pair of pairs of groove portion and peak portion.

[0018] The telescopic body includes a nut disposed concentrically with an axis of the cylindrical body, The nut is characterized in that the ridges or grooves constituting the anti-rotation portion are formed on the cylindrical body side surface, and the nut is screwed onto the long shaft portion on the side opposite to the direction in which it extends.

[0019] The anti-rotation portion is The fixing member has an inner wall surface and an outer ridge portion formed on the inner wall surface of the fixing member. The fixing member has an inner wall surface and an outer ridge portion formed on the inner wall surface of the fixing member. Or, The fixing member is characterized in that it is constituted by an inward ridge portion formed on the inner wall surface of the fixing member, and an outward groove portion formed on the surface opposite the inner wall surface of the fixing member. Effect of the Invention

[0020] According to the rod-shaped telescopic device of the live line sorting tool of the present invention, due to such a configuration, the strength against bending of the cylindrical body and / or telescopic body is enhanced vertically upward and / or downward in the area close to the opposing opposing faces. In addition, with such a configuration, the rod-shaped extensible device of the live line sorting tool of the present invention has further enhanced bending strength. [Brief description of the drawings]

[0021] [Figure 1] 1 is a front view of a live line sorting tool equipped with a rod-shaped expander according to an embodiment of the present invention; [Diagram 2] 1 is a perspective view showing a fixed body and an expandable body of a rod-shaped expander according to an embodiment of the present invention; FIG. [Diagram 3]3 is a schematic diagram of the fixed body and the telescopic body shown in FIG. 2, (a) is a side view of the telescopic body, (b) is a front sectional view of the telescopic body, (c) is an AA sectional view of (b), (d) is a side view of the fixed body, (e) is a front sectional view, and (f) is a BB sectional view of (e). [Figure 4A] FIG. 2 is a front cross-sectional diagram of a live-wire sorting tool. [Figure 4B] FIG. 13 is a front cross-sectional diagram showing the movement of a rod-shaped extender in the live line sorting tool. [Diagram 5] 3 is a schematic diagram of a modified example of the fixed body and the expandable body shown in FIG. 2, in which (a) is a side view of the expandable body, (b) is a front sectional view of the expandable body, (c) is a sectional view along AA line (b), (d) is a side view of the fixed body, (e) is a front sectional view, (f) is a sectional view along BB line (e), and (g) is a sectional view along CC line (e). [Figure 6] FIG. 11 is a perspective view of a fixed body and an expandable body of a rod-shaped expandable device according to a second embodiment of the present invention; [Figure 7] 7 is a schematic diagram of the fixed body and the telescopic body shown in FIG. 6, in which (a) is a side view of the telescopic body, (b) is a front sectional view of the telescopic body, (c) is an AA sectional view of (b), (d) is a side view of the fixed body, (e) is a front sectional view of the fixed body, and (f) is a BB sectional view of (e). [Figure 8] FIG. 13 is a perspective view of a fixed body and an expandable body of a rod-shaped expander according to a third embodiment of the present invention. [Figure 9] 9 is a schematic diagram of the fixed body and the stretchable body shown in FIG. 8, (a) is a perspective diagram of the stretchable body, (b) is a side diagram of the stretchable body, (c) is a front diagram of the stretchable body, (d) is an AA cross-sectional diagram of (b), (e) is a side diagram of the fixed body, and (f) is a BB cross-sectional diagram of (e). [Figure 10] FIG. 13 is a perspective view of a fixed body and an expandable body of a rod-shaped expander according to a fourth embodiment of the present invention. [Figure 11]11 is a schematic diagram of the fixed body and the stretchable body shown in FIG. 10, (a) is a perspective diagram of the stretchable body, (b) is a side diagram of the stretchable body, (c) is a front diagram of the stretchable body, (d) is an AA cross-sectional diagram of (b), (e) is a side diagram of the fixed body, and (f) is a BB cross-sectional diagram of (e). [Figure 12] FIG. 13 is a perspective view of a fixed body and an expandable body of a rod-shaped expander according to a fifth embodiment of the present invention. [Figure 13] 13 is a schematic diagram of the fixed body and the stretchable body shown in FIG. 12, (a) is a perspective diagram of the stretchable body, (b) is a side diagram of the stretchable body, (c) is a front diagram of the stretchable body, (d) is an AA cross-sectional diagram of (b), (e) is a side diagram of the fixed body, and (f) is a BB cross-sectional diagram of (e). [Figure 14] 13 is a diagram of a modified example of the fixed body and the stretchable body shown in FIG. 12, (a) is a perspective diagram of the stretchable body, (b) is a side diagram of the stretchable body, (c) is a front diagram of the stretchable body, (d) is an AA cross-sectional diagram of (b), (e) is a side diagram of the fixed body, and (f) is a BB cross-sectional diagram of (e). [Figure 15] FIG. 13 is a perspective view of a fixed body and an expandable body of a rod-shaped expander according to a sixth embodiment of the present invention. [Figure 16] 16 is a schematic diagram of the fixed body and the stretchable body shown in FIG. 15, (a) is a perspective diagram of the stretchable body, (b) is a side diagram of the stretchable body, (c) is a front diagram of the stretchable body, (d) is an AA cross-sectional diagram of (b), (e) is a side diagram of the fixed body, and (f) is a BB cross-sectional diagram of (e). [Figure 17] 16 is a diagram of a modified example of the fixed body and the stretchable body shown in FIG. 15, (a) is a perspective diagram of the stretchable body, (b) is a side diagram of the stretchable body, (c) is a front diagram of the stretchable body, (d) is an AA cross-sectional diagram of (b), (e) is a side diagram of the fixed body, and (f) is a BB cross-sectional diagram of (e). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] (definition) In the description of the present invention, the side or direction in which the elastic body comes out of the fixed body is referred to as the stretching direction of the elastic body, and the side or direction in which the elastic body enters the fixed body is referred to as the contracting direction of the elastic body. Also, the direction perpendicular to the stretching direction of the elastic body is referred to as the up-down direction, and in the perpendicular direction, the top is referred to as the top or upper side, and the bottom is referred to as the bottom or lower side.

[0023] (direction) 1 is referred to as the right side, the left side is referred to as the left side, the long axis direction of fixed body 12 is referred to as the long axis direction, and the direction perpendicular to the long axis direction of fixed body 12 is referred to as the long axis perpendicular direction.

[0024] (Live line sorting tool equipped with a rod-shaped expander) The live line sorting tools 1, 2, 3, 4, 5, and 6 equipped with the rod-shaped expander of this embodiment shown in FIG. 1 are tools used when cutting electric wires and spacing one end of the cut electric wire apart from the other end of the cut electric wire. The following description is of specific examples of live line distribution tools 1, 2, 3, 4, 5, and 6 equipped with a rod-shaped expander of the present invention, and is not intended to restrict the scope of the claims.

[0025] As shown in FIG. 1, the live line sorting tools 1, 2, 3, 4, 5 and 6 equipped with rod-shaped stretchers of this embodiment are equipped with a pair of electric wire gripping tools 900 on the left and right fixed at an appropriate interval to a live electric wire, a rod-shaped stretcher 10 capable of loosening the electric wire between a first electric wire gripping tool 902 constituting the electric wire gripping tool 900 and a second electric wire gripping tool 904 constituting the electric wire gripping tool 900, and an electric wire support tool 906 and an electric wire support tool 908 that respectively hold the cut ends of the electric wire cut between the first electric wire gripping tool 902 and the second electric wire gripping tool 904. 1 The power distribution line support 908 shown in is the power distribution line support 908 on the left. The extensible rod-shaped stretcher 10 of this embodiment is an extensible tubular member, and the distance between the first electric wire gripping tool 902 and the second electric wire gripping tool 904 changes when the stretchable body of the extensible rod-shaped stretcher 10 in the longitudinal direction is stretched or contracted.

[0026] The first electric wire gripping tool 902 is a tool for gripping a first portion P1 of the electric wire W, and the second electric wire gripping tool 904 is a tool for gripping a second portion P2 of the electric wire W that is different from the first portion P1. The live line sorting tools 1, 2, 3, 4, 5, and 6 of the present embodiment are arranged so that the electric wire W is 1 After the electric wire W is inserted into the area C1 of the electric wire support shown in FIG. 1, a first portion P1 of the electric wire W is grasped by a first electric wire gripping tool 902, and a second portion P2 of the electric wire W is grasped by a second electric wire gripping tool 904, thereby grasping the electric wire W. The rod-shaped stretcher 10 of the live line distribution tools 1, 2, 3, 4, 5, and 6 of this embodiment grips the electric wire W, and then shortens the length of the extendable rod-shaped stretcher 10 in the longitudinal direction to shorten the distance between the first electric wire gripping tool 902 and the second electric wire gripping tool 904, thereby bending the portion of the electric wire W between the left distribution line support tool 908 and the right distribution line support tool 906 so that it protrudes in the direction opposite to the rod-shaped stretcher 10, and cuts the bent portion with a cutting blade, thereby cutting the electric wire W. The rod-shaped extenders of the live line distribution tools 1, 2, 3, 4, 5, and 6 of the present embodiment shown in Fig. 1 are not provided with cutting blades for cutting electric wires, so the rod-shaped extenders 10 of the live line distribution tools 1, 2, 3, 4, 5, and 6 of the present embodiment shown in Fig. 1 may be called electric wire cutting aids. Note that the rod-shaped extenders 10 of the live line distribution tools 1, 2, 3, 4, 5, and 6 of the present embodiment shown in Fig. 1 may be provided with cutting blades for cutting electric wires.

[0027] As shown in Figures 1 and 2, the rod-shaped telescopic device 10 of the live line distribution tools 1, 2, 3, 4, 5 and 6 of this embodiment comprises a fixed body 12 which is a stationary body, a telescopic body 14 connected to the fixed body 12 so as to be freely movable in the longitudinal direction, a reciprocating shaft 16 arranged on the axis of the fixed body 12, and an extension force imparting mechanism 18 which moves the reciprocating shaft 16 in the longitudinal direction of the fixed body 12. The telescopic body 14 is connected to the cylindrical inner surface portion 24b of the fixed body 12 so as to be freely movable in the longitudinal direction, and when the reciprocating shaft 16 rotates due to the action of the telescopic force imparting mechanism 18, the telescopic body 14 moves longitudinally within the fixed body 12 in a rotation-preventing state.

[0028] The fixed body 12 and / or the elastic body 14 have strength portions 30 and 50 in the regions close to the opposing faces, which strengthen the strength against bending in the vertical upward and / or downward directions.

[0029] In another embodiment of the rod-shaped stretcher 10 of the live line distribution tool 1, 2, 3, 4, 5, 6, the stretchable body 14 is further formed as a rod-shaped body having an elliptical cross section, and the long axis passing through the center of the ellipse extends vertically to enhance its strength against bending.

[0030] In the rod-shaped expander 10 of the live line distribution tool 1, 2, 3, 4, 5, 6 of this embodiment, the strength portion 30 formed on the fixed body 12 and / or the strength portion 50 formed on the expandable body 14 are composed of a ridge portion formed on one side or the other side in the area where the fixed body 12 and the expandable body 14 arranged inside face each other, The mountain portion has a slope extending from its peak that is arc-shaped in cross section, and the groove or mountain portion of the fixed body 12 and the mountain or mountain portion of the expandable body 14 are configured to face each other and come into contact with each other.

[0031] In another embodiment of the rod-shaped expander 10 of the live line distribution tool 1, 2, 3, 4, 5, 6, the strength portion 30 formed on the fixed body 12 and / or the strength portion 50 formed on the expandable body 14 further constitute a rotation prevention portion 60 that regulates rotation of the expandable body 14 around its axis, and the rotation prevention portion 60 is constituted by at least one pair of groove portions and ridge portions.

[0032] In the rod-shaped stretcher 10 of the live line sorting tool 1, 2, 3, 4, 5, 6 of another embodiment, the stretchable body 14 further includes a block portion 40 and a long shaft portion 42 extending from the rear end of the block portion 40, The block portion 40 and / or the long shaft portion 42 have a strength portion 50 formed in a region where the fixed body 12 faces the expandable body 14 disposed inside the fixed body 12.

[0033] In the rod-shaped stretcher 10 of the live line sorting tool 1, 2, 3, 4, 5, 6 of another embodiment, the stretchable body 14 further includes a block portion 40 and a long shaft portion 42 extending from the rear end of the block portion 40, The telescopic body 14 is provided with a nut 70 constituting a block portion arranged on the long shaft portion 42 concentrically with the axis of the fixed body 12, and the nut 70 has a ridge portion 52 or a groove portion 54 formed in the area facing the fixed body 12, which constitutes the strength portion 50 and anti-rotation portion 60 of the telescopic body 14.

[0034] In another embodiment of the rod-shaped extender 10 of the live line distribution tool 1, 2, 3, 4, 5, 6, the nut 70 has the mountain portion or the groove portion constituting the anti-rotation portion 60 formed on the surface on the side of the fixed body 12, and is screwed onto the screw shaft of the long shaft portion 42 on the side opposite to the extension direction.

[0035] In the rod-shaped expander 10 of the live line distribution tool 1, 2, 3, 4, 5, 6 of another embodiment, the strength portion 30 and the strength portion 50 formed on the fixed body 12 and / or the expandable body 14 constitute a rotation prevention portion 60, The anti-rotation portion 60 is The elastic body 14 is configured by an inward groove portion formed on the inner wall surface of the fixed body 12 and an outward ridge portion formed on a surface of the expandable body 14 facing the inner wall surface of the fixed body 12, Or, It is constituted by an inward ridge portion formed on the inner wall surface of the fixed body 12 and an outward groove portion formed on the surface of the fixed body 12 opposite the inner wall surface.

[0036] In another embodiment of the live line distribution tool 1, 2, 3, 4, 5, 6, the rod-shaped telescopic device 10 includes a fixed body 12, a telescopic body 14 fitted in the hollow portion of the fixed body 12 so as to be freely movable in the longitudinal direction, and a reciprocating shaft 16 arranged on the axis of the fixed body 12. A rod-shaped telescopic device is provided with a strength portion and a rotation-stop portion 60 formed in the opposing regions of the fixed body 12 and the telescopic body 14, and when the reciprocating shaft 16 rotates, the telescopic body 14 moves and expands in the longitudinal direction within the hollow portion of the fixed body 12 in a rotation-stop state. The reinforcing portion and anti-rotation portion 60 is formed in a region where the fixed body 12 and the expandable body 14 disposed inside thereof face each other, and is composed of a groove portion formed on one side of the fixed body 12 and a ridge portion formed on the other side of the fixed body 12 and the anti-rotation portion 60 is formed in a region where the fixed body 12 and the expandable body 14 disposed inside thereof face each other, The groove portion has a slope extending from the bottom of the groove that is arc-shaped in cross section, and the peak portion has a slope extending from the top of the groove that is arc-shaped in cross section. The groove portion and the peak portion are in contact with each other opposite to each other to form a rotation prevention portion 60 that restricts rotation around the axis of the telescopic body 14, and the rotation prevention portion 60 is composed of at least one pair of the groove portion and the peak portion.

[0037] In the rod-shaped stretcher 10 of the live line distribution tool 1, 2, 3, 4, 5, 6 of another embodiment, The telescopic body 14 includes a nut 70 arranged concentrically with the axis of the fixed body 12, The nut 70 has the ridges or grooves that constitute the anti-rotation portion 60 formed on its surface on the fixed body 12 side, and is screwed onto the long shaft portion 42 on the side opposite to the extending direction.

[0038] In the rod-shaped stretcher 10 of the live line distribution tool 1, 2, 3, 4, 5, 6 of another embodiment, The anti-rotation portion 60 is The elastic body 14 is configured by an inward groove portion formed on the inner wall surface of the fixed body 12 and an outward ridge portion formed on a surface of the expandable body 14 facing the inner wall surface of the fixed body 12, Or, It is constituted by an inward ridge formed on the inner wall surface of the fixed body 12 and an outward groove formed on the surface of the fixed body opposite the inner wall surface.

[0039] In the rod-shaped stretcher 10 of the live line distribution tool 1, 2, 3, 4, 5, 6 of another embodiment, The device comprises a fixed body 12, an expandable body 14 connected to the cylindrical inner surface of the fixed body 12 so as to be freely movable in the longitudinal direction, and a reciprocating shaft 16 disposed on the axis of the fixed body 12, In the rod-shaped telescopic device, when the reciprocating shaft 16 rotates, the telescopic body 14 moves in the longitudinal direction within the hollow portion of the fixed body 12, The fixed body 12 includes a fixed main body 20 and a cylindrical body 22. The telescopic body 14 includes a mass portion 40 and a longitudinal axis portion 42. The reciprocating shaft 16 is movably attached to the fixed body 12 via a bearing 98 .

[0040] In the rod-shaped stretcher 10 of the live line distribution tool 1, 2, 3, 4, 5, 6 of another embodiment, The reciprocating shaft 16 is connected to a gear box 90, and in the gear box 90, a gear attached to the reciprocating shaft 16 connected to the gear box 90 meshes with a gear rotated by a rotating tool. A bearing 98 for the rotating shaft of the gear rotated by the rotating tool is attached to the gear box 90, and the outer surface of the bearing 98 for the rotating shaft of the gear is fitted into and connected to the mounting surface of the gear box 90.

[0041] In the rod-shaped stretcher 10 of the live line distribution tool 1, 2, 3, 4, 5, 6 of another embodiment, The fixed body 12 is provided with a gear box 90 in a region where the connecting portion 26 and the engagement cylindrical portion 28 surround the gear chamber 27. The reciprocating shaft 16 extending into the gear box 90 is attached to the connecting portion 26 by a bearing 98, and a second bevel gear 94 is attached to its tip. The input member 140 is attached to the engagement cylindrical portion 28 by a bearing 98, and a first bevel gear 92 is attached to its tip. The second bevel gear 94 and the first bevel gear 92 mesh with each other. A bearing 98 for the rotating shaft of the gear rotated by the rotating tool 800 is attached to the gear box 90, and the outer surface of the bearing 98 for the rotating shaft of the gear is fitted and connected to the mounting surface of the gear box 90.

[0042] (First embodiment) Hereinafter, the rod-shaped extensible device 10 of the live-line distribution tool 1 according to the first embodiment of the present invention will be described with reference to Figs. The live line distribution tool 1 includes a rod-shaped extension tool 10 and wire gripping tools 900 connected to both ends of the rod-shaped extension tool 10.

[0043] The rod-shaped expander 10 of the live line distribution tool 1 of the first embodiment shown in Figure 2 comprises an insulating fixed body 12, an expandable body 14 inserted into the hollow portion of the fixed body 12 so as to be freely movable in the longitudinal direction and connected thereto, a reciprocating shaft 16 arranged on the axial core of the fixed body 12 and the expandable body 14, and an expansion force imparting mechanism 18 arranged at the end of the reciprocating shaft 16.

[0044] The fixed body 12 includes a fixed main body 20 and a cylindrical body 22 connected to the fixed main body 20 . The fixed body 20 is configured to allow the telescopic body 14 to be attached in a telescopic manner, and is configured to connect the rod-shaped telescopic device 10 to the electric wire gripping tool 900. The fixed body 20 that constitutes the fixed body 12 has a cylindrical connecting portion 26 on the side to which the telescopic body 14 is connected, and is connected to the connecting portion 26 by a gear chamber 27 that incorporates the telescopic force imparting mechanism 18, and an engaging cylindrical portion 28 connected to the gear chamber 27.

[0045] The stretchable body 14 is a rod-like body having a longitudinal direction as a whole, and has a block portion 40 in a region close to the fixed body 12. The block portion 40 is a cylindrical body that bulges out from the outer periphery of a rod-like long axis portion 42 that constitutes the stretchable body 14. The telescopic body 14 is connected to the fixed body 12 so as to move in the longitudinal direction. The block 40 is a cylindrical body that is shorter than the long axis portion 42 of the stretchable body 14, and is a block that is concentric with the cylindrical stretchable body 14 and thicker than the stretchable body 14. In this embodiment, the diameter of the block 40 is 1.3 to 1.8 times the diameter of the long axis portion 42 of the stretchable body 14.

[0046] When the rotating tool 800 is operated to activate the expansion / contraction force imparting mechanism 18 and rotate the reciprocating shaft 16, the expansion / contraction body 14 moves in the longitudinal direction within the hollow portion of the fixed body 12 in a rotation-preventing state. The fixed body 12 and the expandable body 14 are formed with strength portions 30 and 50 in the regions close to the opposing faces, which strengthen the strength against bending upward and / or downward in the vertical direction. The strength portion 30 is formed on the fixed body 12 , and the strength portion 50 is formed on the expandable body 14 .

[0047] The rod-shaped telescopic device 10 is configured such that, when the reciprocating shaft 16 is rotated from the outside, the long shaft portion 42 constituting the telescopic body 14 telescopically slides together with the block portion 40 within the hollow portion of the fixed body 12 .

[0048] The fixed body 12 is It is hollow, and the cross section of the hollow portion perpendicular to the major axis is generally elliptical, and has a cylindrical outer surface portion 24a on the outside thereof and a cylindrical inner surface portion 24b on the inside thereof. The fixed body 20 of the fixed member 12 has connecting portions 26 at both ends, each of which has a substantially cylindrical shape. The cylindrical body 22 of the fixed body 12 has a cylindrical inner surface portion 24b whose cross-sectional shape perpendicular to the long axis is approximately elliptical, and in which the outer surface of the strength portion 50 of the stretchable body 14 contacts the strength portion 30 inside the fixed body 12 from one end to the other end, and the strength portion 50 of the stretchable body 14 is inserted freely slidingly. A reinforcing portion 30 is formed on the cylindrical inner surface portion 24b of the cylindrical body 22 of the stationary body 12. The strength portion 30 has a generally elliptical cross-sectional shape in the direction perpendicular to the long axis, and a peak portion 32 is formed so as to protrude from at least one vertex on the long axis side of the strength portion 30. The peak portion 32 has a cross-sectional shape in the direction perpendicular to the long axis, and the slope extending from the peak has an arc-shaped cross-sectional shape. The ridges 32 are mountain-shaped protruding inward from the cylindrical inner surface portion 24b of the cylindrical body 22, have arc-shaped peaks, and are stripes of uniform cross section extending in the left-right direction. The peaks 32 are shaped to fit into grooves 54 formed in the block portion 40 of the expandable body 14 described below, and are configured to slide along the grooves 54 in the direction in which the grooves 54 extend.

[0049] The fixed body 12 further includes: The cylindrical engaging portion 28 is formed so as to protrude from the connecting portion 26 adjacent to the cylindrical outer surface portion 24a of the cylindrical body 22 so as to be connected to the connecting portion 26, and has a substantially cylindrical shape. The engagement cylindrical portion 28 has a gear chamber 27 that is generally cylindrical and extends from approximately the center of one end of the engagement cylindrical portion 28 toward approximately the center of the cylindrical inner surface portion 24b of the fixed body 20 at the upper portion of the engagement cylindrical portion 28.

[0050] To ensure insulation, the stationary body 12 is made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0051] The telescopic body 14 has a long shaft portion 42 at the rear end of the mass portion 40. The long axis portion 42 is a cylindrical body having a generally elliptical cross section in a direction perpendicular to the long axis, and has strength portions 50 formed in the upper and lower regions. The block portion 40 is a cylindrical block having a generally elliptical cross section perpendicular to its long axis, and a screw portion 44 consisting of a female screw is formed on the surface facing the hollow portion extending in the longitudinal axis direction. The reciprocating shaft 16 is attached to the screw portion 44 so as to threadably move. The stretchable body 14 is shown in FIG. 3 As shown in FIG. 1, the cross-sectional shape of the block portion 40 and the long axis portion 42 in the direction perpendicular to the long axis is substantially elliptical. The outer surface of the elastic body is formed with an outer surface portion 46a having a cross-sectional shape perpendicular to the major axis that is substantially elliptical. An expandable inner surface portion 46b having a substantially circular cross section in a direction perpendicular to the long axis is formed on the inner surface. In order to ensure insulation, the stretchable body 14 is also made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0052] The mass 40 of the elastic body 14 is 2 and 3As shown in FIG. 1, it extends from the end of the long axis portion 42 of the telescopic body 14, is connected to the end of the long axis portion 42 of the telescopic body 14, and has a cross-sectional shape perpendicular to the long axis formed so as to protrude from the outer surface portion 46a of the long axis portion 42 of the telescopic body 14, which is approximately elliptical. The telescopic body 14 has an inner surface portion 46b having an approximately circular cross-sectional shape perpendicular to the long axis, with a threaded portion 44 formed on the surface thereof extending from the end opposite the long axis portion 42 of the telescopic body 14 toward the inside of the block portion 40.

[0053] The strength section 50 formed in the block 40 of the elastic body 14 has a groove section 54 formed from at least one vertex on the long axis side of the approximately elliptical cross-sectional shape perpendicular to the long axis toward the inside of the block 40, the groove wall of which has an arc-shaped cross-sectional shape in the long axis perpendicular direction extending from the groove bottom. The reinforcing portion 50 formed on the block portion 40 has ridges 52 protruding from both sides of the groove portion 54 . The ridge portion 52 has a cross-sectional shape perpendicular to the long axis, the slope continuing from the peak being an arcuate cross-section.

[0054] The rod-shaped stretcher 10 of this embodiment is shown in FIG. 3 As shown in Figs. 1 to 6, the strength portion 50 of the mass portion 40 of the telescopic body 14 and the strength portion 30 of the fixed body 12 form a rotation prevention portion 60 that prevents the strength portion 30 of the fixed body 12 and the mass portion 40 of the telescopic body 14 from rotating around the central axis in the longitudinal direction of the fixed body 12 within the hollow portion of the fixed body 12. In this embodiment, the anti-rotation portion 60 is composed of the ridges 52 and grooves 54 which constitute the strength portion 50 of the expandable body 14 , and the ridges 32 which constitute the strength portion 30 of the fixed body 12 .

[0055] The peaks 32 of the strength portion 30 of the fixed body 12 and the grooves 54 of the block portion 40 of the elastic body 14 face each other and contact each other, and the peaks 32 of the fixed body 12 and the peaks 52 of the elastic body 14 constitute the strength portion 30 and the strength portion 50 which prevent the fixed body 12, the elastic body 14 and the block portion 40 from being destroyed by forces applied to the fixed body 12, the elastic body 14 and the block portion 40. The strength portion 50 of the stretchable body 14 is constituted by at least a pair of ridges 52, and the ridges 52 are constituted by sandwiching a groove portion 54 on both ends of the groove portion 54. In this embodiment, the strength portion 50 of the stretchable body 14 also prevents the strength portion 50 of the stretchable body 14 and the strength portion 30 of the fixed body 12 from rotating around the longitudinal axis of the fixed body 12 inside the fixed body 12.

[0056] The fixed body 12 is provided with a gear box 90 that constitutes the expansion and contraction force imparting mechanism 18 in a region where the connecting portion 26 and the engaging cylindrical portion 28 surround the gear chamber 27 .

[0057] The fixed body 12 has a gear box 90 formed in the fixed main body 20. The gear box 90 includes an insertion member 120, which is a substantially inverted stepped cylinder inserted into the engagement cylindrical portion 28, an input member 140 inserted into the insertion member 120, a first bevel gear 92, which is substantially in a chevron shape, attached to the input member 140, a second bevel gear 94, which is substantially in a chevron shape, attached to the reciprocating shaft 16, and a first cap 160, which is substantially in a cylindrical shape, inserted into both cylindrical outer surface portions 24a.

[0058] The reciprocating shaft 16 extending inside the gearbox 90 is a rod-shaped body having a longitudinal direction, and extends in the same direction as the longitudinal direction of the bearing 98 and in a direction perpendicular to the extension direction of the input member 140. The reciprocating shaft 16 is attached to the connecting portion 26 by the bearing 98, and has a second bevel gear 94 attached to its tip. The input member 140 is attached to the engagement cylindrical portion 28 by the bearing 98, and has a first bevel gear 92 attached to its tip. The second bevel gear 94 and the first bevel gear 92 mesh with each other. The input member 140 is attached to the insertion member 120 via a bearing 98 so as to rotate by a rotating tool 800 engaged with the engagement portion 148 . The input member 140 is fitted inside the engagement cylindrical portion 28 of the fixed main body 20 .

[0059] The first bevel gear 92 is attached to the second input shaft 146 of the input member 140 and has a first gear that is generally frusto-conical in shape on its upper surface.

[0060] The second bevel gear 94 is attached to the reciprocating shaft 16 and has a second gear on its upper surface that is generally frusto-conical in shape. The first gear of the first bevel gear 92 and the second gear of the second bevel gear 94 mesh with each other, The rotational force applied to the input portion 142 of the input member 140 is transmitted from the first input shaft 144 via the second input shaft 146 to the first bevel gear 92, and the rotational force transmitted to the first bevel gear 92 is transmitted to the second bevel gear 94 meshing with the first bevel gear 92, and thereby to the reciprocating shaft 16 on which the second bevel gear 94 is attached. Therefore, when a rotational force is applied to the input portion 142 of the input member 140, the rotational force is transmitted to the reciprocating shaft 16, causing the reciprocating shaft 16 to rotate.

[0061] The insert 120 has a generally cylindrical shape. The upper side surface has a first insertion side surface portion 122 having a substantially cylindrical shape, A second insertion side surface portion 124 having a substantially cylindrical shape is provided on the lower side surface, An approximately cylindrical insertion hole 126 is provided from approximately the center of one end to approximately the center of the other end.

[0062] The first cap 160 has at one end a first cap end 162 having a generally circular cross-sectional shape perpendicular to the long axis, and a generally cylindrical cap side portion 164, and at the other end a second cap end 166 having a generally circular cross-sectional shape perpendicular to the long axis.

[0063] The second cap 170 covers the edge of the stretchable body 14 and has a cylindrical fitting portion 172 that follows the outer shape of the edge of the stretchable body 14, and a donut-shaped covering portion 174 that is connected to the edge of the fitting portion 172. The long shaft portion 42 is inserted into the opening of the covering portion 174 .

[0064] Since the reinforcing portion 30 constitutes the anti-rotation portion 60, the rotation input applied to the reciprocating shaft 16 is converted into a force in the extension / retraction sliding direction without any loss, and an accurate extension / retraction function is ensured.

[0065] In this way, the live line distribution tool 1 of the first embodiment of the present invention is able to ensure the telescopic sliding function without using special anti-rotation parts and / or special reinforcing parts to prevent the fixed body 12, the long shaft portion 42 and the block portion 40 of the telescopic body 14 from being destroyed by forces applied to the fixed body 12, the telescopic body 14 and the strength portion 30.

[0066] (Modification of the first embodiment) As shown in FIG. 5, the rod-shaped stretcher 10 of the first embodiment may be a cylindrical body in which the block portion 40 and the long shaft portion 42 constituting the stretchable body 14 are approximately the same in thickness, the block portion 40 is formed at a portion of the tip of the long shaft portion 42, and a strength portion 50 is formed in the area of ​​the block portion 40.

[0067] (Second embodiment) Hereinafter, a rod-shaped extensible device 210 of a live-line sorting tool 2 according to a second embodiment of the present invention will be described with reference to FIGS.

[0068] A rod-shaped extensible tool 210 of a live line sorting tool 2 according to the second embodiment of the present invention is an embodiment different from the rod-shaped extensible tool 10 of a live line sorting tool 1 according to the first embodiment of the present invention. The rod-shaped telescopic device 210 of the live line sorting tool 2 of the second embodiment of the present invention differs from the rod-shaped telescopic device 10 of the live line sorting tool 1 of the first embodiment of the present invention in that the fixed body 12, the telescopic body 14, the strength part 30, the reciprocating shaft 16, the strength part 50 and the anti-rotation part 60 of the live line sorting tool 1 of the first embodiment of the present invention are replaced by a fixed body 212, an expandable body 214, a strength part 30, a reciprocating shaft 216, a strength part 250 and an anti-rotation part 260. For this reason, with regard to the live line sorting tool 2 according to the second embodiment of the present invention, explanations will be omitted for all points other than the fixed body 212, the expandable body 214, the strength portion 30, the reciprocating shaft 216, the strength portion 250 and the anti-rotation portion 260.

[0069] The rod-shaped telescopic device 210 of the live line distribution tool 2 of the second embodiment shown in Figure 6 comprises an insulating fixed body 212, an expandable body 214 inserted into the hollow portion of the fixed body 212 so as to be freely movable in the longitudinal direction and connected thereto, a reciprocating shaft 216 arranged on the axial center of the fixed body 212 and the expandable body 214, and an expansion force imparting mechanism 218 arranged at the end of the reciprocating shaft 216. When the rotating tool 800 is operated to activate the expansion / contraction force imparting mechanism 218 and rotate the reciprocating shaft 216, the expansion / contraction body 214 moves in the longitudinal direction within the hollow portion of the fixed body 212 in a rotation-preventing state. The fixed body 212 and the expandable body 214 are formed with strength portions 30 and 250 in the regions close to the opposing faces, which strengthen the strength against bending upward and / or downward in the vertical direction. The strength portion 30 is formed on the fixed body 212 , and the strength portion 250 is formed on the expandable body 214 .

[0070] The rod-shaped telescopic device 10 is configured such that, when the reciprocating shaft 216 is rotated from the outside, the long shaft portion 42 constituting the telescopic body 214 telescopically slides together with the mass portion 240 within the hollow portion of the fixed body 212 .

[0071] The fixed body 212 of the rod-shaped extender 210 of the live line sorting tool 2 of the second embodiment of the present invention differs from the live line sorting tool 1 of the first embodiment of the present invention in that the cylindrical outer surface portion 24a, the connecting portion 26, the cylindrical inner surface portion 24b and the engaging cylindrical portion 28 of the fixed body 12 of the live line sorting tool 1 of the first embodiment of the present invention are replaced by a cylindrical outer surface portion 224a, a connecting portion 26, a cylindrical inner surface portion 224b and an engaging cylindrical portion 28. For this reason, with regard to the fixed body 212 of the live line distribution tool 2 according to the second embodiment of the present invention, explanations will be omitted for all points other than the cylindrical outer surface portion 224a, the connecting portion 26, the cylindrical inner surface portion 224b and the engaging cylindrical portion 28.

[0072] The fixed body 212 is It is hollow, and the cross section of the hollow portion perpendicular to the major axis is substantially elliptical, and has a cylindrical outer surface portion 224a on its outside and a cylindrical inner surface portion 24b on its inside. The fixed body 20 of the fixed body 212 has connecting portions 26 at both ends, each of which has a substantially cylindrical shape. The cylindrical body 222 of the fixed body 212 has an outer surface of the strength part 250 of the elastic body 214 in contact with the strength part 30 inside the fixed body 212 from one end to the other end, and has a cylindrical inner surface part 224b whose cross-sectional shape perpendicular to the long axis is approximately elliptical, and into which the strength part 250 of the elastic body 214 is inserted so as to be freely slidable. The cylindrical inner surface portion 224b of the cylindrical body 222 of the fixed body 212 has a strength portion 30 formed thereon. The strength portion 30 is formed so that the long axis side of its approximately elliptical cross-sectional shape perpendicular to the long axis protrudes, and a groove portion 234 is formed in which the cross-sectional shape perpendicular to the long axis has a slope extending from the bottom and has an arc-shaped cross-sectional shape.

[0073] The fixed body 212 further includes: The cylindrical body 222 has an engagement cylindrical portion 28 that is formed so as to protrude from the connection portion 26 in the vicinity of the cylindrical outer surface portion 224a of the cylindrical body 222 so as to be connected to the connection portion 26, and has a substantially cylindrical shape. The engagement cylindrical portion 28 has a gear chamber 27 that is generally cylindrical in shape and extends from approximately the center of one end of the engagement cylindrical portion 28 toward approximately the center of the cylindrical inner surface portion 224b of the fixed body 20 at the upper portion of the engagement cylindrical portion 28. The fixed body 212 has a side cylindrical engagement portion 29 which is formed in a substantially concentric cross-sectional shape perpendicular to the longitudinal direction of the engagement cylindrical portion 28 so as to protrude from the gear chamber 27 and to be connected to the gear chamber 27 near the end of the engagement cylindrical portion 28 inside the fixed body 212.

[0074] To ensure insulation, the fixed body 212 is made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0075] The telescopic body 214 has a long shaft portion 242 at the rear end of the mass portion 240. The long axis portion 242 is a cylindrical body having a generally elliptical cross section in a direction perpendicular to the long axis, and has strength portions 250 formed in upper and lower regions. The block 240 is a cylindrical block having a generally elliptical cross section perpendicular to its long axis, and a screw portion 244 consisting of a female screw is formed on the surface facing the hollow portion extending in the longitudinal axis direction. The reciprocating shaft 216 is attached to the screw portion 244 so as to threadably move. As shown in FIGS. 6 and 7, the cross-sectional shape of the bulk portion 240 and the long axis portion 242 of the stretchable body 214 perpendicular to the long axis is substantially elliptical. The outer surface is formed with a stretchable outer surface portion 246a having a cross-sectional shape perpendicular to the major axis that is substantially elliptical. An expandable inner surface portion 246b having a substantially circular cross section in a direction perpendicular to the long axis is formed on the inner surface. In order to ensure insulation, the expandable body 214 is also made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0076] As shown in Figures 6 and 7, the mass portion 240 of the elastic body 214 is connected from the end of the long axis portion 242 of the elastic body 214 to the end of the elastic body 214, and its cross-sectional shape perpendicular to the long axis formed so as to protrude from the end of the elastic body outer surface portion 246a of the long axis portion 242 of the elastic body 214 is approximately elliptical. The mass portion 240 of the elastic body 214 has an outer surface whose cross section perpendicular to the major axis has a substantially elliptical shape. An elastic body 214 has an inner surface portion 246b extending from the end opposite the long axis portion 242 toward the inside of the mass portion 240, the inner surface portion 246b having a generally circular cross-sectional shape perpendicular to the long axis and having a threaded portion 244 formed on its surface. The strength portion 250 formed in the block portion 240 has a peak portion 252 formed so as to protrude from at least one vertex on the long axis side of the approximately elliptical cross-sectional shape perpendicular to the long axis, and the slope extending from the peak of the cross-sectional shape perpendicular to the long axis has an arc-shaped cross-sectional shape. The block 240 is a cylindrical body that is shorter than the long axis portion 242 of the stretchable body 214, and is a block that is concentric with the cylindrical stretchable body 214 and thicker than the stretchable body 214. In this embodiment, the diameter of the block 240 is 1.3 to 1.8 times the diameter of the long axis portion 242 of the stretchable body 214. The peaks 252 are mountain-shaped protruding outward from the outer surface 246a of the stretchable body 214, have an arc-shaped peak, and are stripes of uniform cross section extending in the left-right direction. The peaks 252 are shaped to fit into grooves 234 formed in a strength portion 30 of the fixed body 212, which will be described later, and are configured to slide along the grooves 234 in the direction in which the grooves 234 extend.

[0077] As shown in Figures 6 and 7, in the rod-shaped telescopic device 210 of this second embodiment, the strength portion 250 of the mass portion 240 of the telescopic body 214 and the strength portion 30 of the fixed body 212 form a rotation prevention portion 260 that prevents the strength portion 30 of the fixed body 212 and the mass portion 240 of the telescopic body 214 from rotating around the central axis in the longitudinal direction of the fixed body 212 within the hollow portion of the fixed body 212. In this embodiment, the anti-rotation portion 260 is composed of the peak portion 252 constituting the strength portion 250 of the expandable body 214 and the groove portion 234 of the fixed body.

[0078] To ensure insulation, the block portion 240 is also made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0079] The groove portion 234 of the fixed body 212 and the peak portion 252 of the mass portion 240 of the elastic body 214 face each other and are in contact with each other, forming a strength portion 30 and a strength portion 250 that prevent the fixed body 212, the elastic body 214 and the mass portion 240 from being destroyed by forces applied to the fixed body 212, the elastic body 214 and the strength portion 30. The strength portion 250 of the stretchable body 214 is composed of at least a pair of upper and lower peaks 252 .

[0080] In this embodiment, the strength portion 250 of the elastic body 214 also prevents the elastic body 214 and the strength portion 30 from rotating inside the fixed body 212 with the longitudinal axis direction of the fixed body 212 as the rotation axis.

[0081] The fixed body 212 has a gear box 90 provided in a region where the connecting portion 26 and the engagement cylindrical portion 28 surround the gear chamber 27 .

[0082] The fixed body 212 has a gear box 90 formed in the fixed main body 20. The gear box 90 includes an insertion member 120, which is a substantially inverted stepped cylinder inserted into the engagement cylindrical portion 28, an input member 140 inserted into the insertion member 120, a first bevel gear 92, which is substantially in a chevron shape, attached to the input member 140, a second bevel gear 94, which is substantially in a chevron shape, attached to the reciprocating shaft 216, and a first cap 160, which is substantially in a cylindrical shape, inserted into both cylindrical outer surface portions 224a.

[0083] A reciprocating shaft 216 extending into the gear box 90 is attached to the connecting portion 26 by a bearing 98, and has a second bevel gear 94 attached to its tip. The input member 140 is attached to the engagement cylindrical portion 28 by a bearing 98, and has a first bevel gear 92 attached to its tip. Then, the second bevel gear 94 meshes with the first bevel gear 92 . The input member 140 is attached to the insertion member 120 via a bearing 98 so as to rotate by a rotating tool 800 engaged with the engagement portion 148 . The input member 140 is fitted inside the engagement cylindrical portion 28 of the fixed main body 20 .

[0084] Since the reinforcing portion 30 constitutes the anti-rotation portion 260, the rotation input applied to the reciprocating shaft 216 is converted into a force in the extension / retraction sliding direction without any loss, and an accurate extension / retraction function is ensured.

[0085] Thus, the live line sorting tool according to the second embodiment of the present invention 2It is possible to ensure the telescopic sliding function without using special anti-rotation parts and / or special reinforcing parts to prevent the fixed body 212, the telescopic body 214 and the mass portion 240 from being destroyed by forces applied to the fixed body 212, the telescopic body 214 and the strength portion 30.

[0086] (Third embodiment) Hereinafter, a rod-shaped extender 310 of a live-line sorting tool 3 according to a third embodiment of the present invention will be described with reference to FIGS.

[0087] A rod-shaped extensible tool 310 of a live line sorting tool 3 according to the third embodiment of the present invention is an embodiment different from the rod-shaped extensible tool 10 of a live line sorting tool 1 according to the first embodiment of the present invention. The rod-shaped telescopic device 310 of the live line sorting tool according to the third embodiment of the present invention is different from the rod-shaped telescopic device 10 of the live line sorting tool 1 according to the first embodiment of the present invention in that the fixed body 12, the telescopic device 14, the block part 40, the reciprocating shaft 16, the strength part 50 and the rotation stop part 60 of the rod-shaped telescopic device 10 of the live line sorting tool 1 according to the first embodiment of the present invention are replaced by a fixed body 312, a telescopic device 314, a nut 370, a reciprocating shaft 316 and a rotation stop part 360. In particular, it is different in that the block part 40 of the telescopic device 14 is composed of a nut 370. Therefore, with regard to the live line sorting tool 3 according to the third embodiment of the present invention, explanations of the components other than the fixed body 312, the expandable body 314, the nut 370, the reciprocating shaft 316 and the anti-rotation portion 360 will be omitted.

[0088] The rod-shaped expander 310 of the live line distribution tool 3 of the third embodiment shown in Figure 8 comprises an insulating fixed body 312, an expandable body 314 inserted into the hollow portion of the fixed body 312 so as to be freely movable in the longitudinal direction and connected thereto, a reciprocating shaft 316 arranged on the axial center of the fixed body 312 and the expandable body 314, and an expansion force imparting mechanism 318 arranged at the end of the reciprocating shaft 316. When the rotating tool 800 is operated to activate the expansion / contraction force imparting mechanism 318 and rotate the reciprocating shaft 316, the expansion / contraction body 314 moves in the longitudinal direction within the hollow portion of the fixed body 312 in a rotation-preventing state. The fixed body 312 and the expandable body 314 are formed with a strength portion 30 and a mass portion 340 in the region close to the opposing faces, which strengthen the strength against bending upward and / or downward in the vertical direction. The strength portion 30 is formed on the fixed body 312 , and the mass portion 340 is formed on the elastic body 314 .

[0089] The nut 370 disposed on the telescopic body 314 constitutes the mass 340 . The rod-shaped telescopic device 10 is configured such that, when the reciprocating shaft 316 is rotated from the outside, the long shaft portion 42 constituting the telescopic body 314 telescopically slides within the fixed body 312 together with the nut 370 constituting the mass portion 340.

[0090] The fixed body 312 is It is hollow, and the cross section of the hollow portion in the direction perpendicular to the long axis is substantially circular, and has a cylindrical outer surface portion 324a on the outside thereof and a cylindrical inner surface portion 324b on the inside thereof. The fixed body 20 of the fixed body 312 has connecting portions 26 at both ends, which are substantially cylindrical in shape. The cylindrical body 322 of the fixed body 312 has a cylindrical inner surface portion 324b whose cross-sectional shape perpendicular to the long axis is approximately elliptical, and in which the outer surface of the mass portion 340 of the elastic body 314 contacts the strength portion 30 inside the fixed body 312 from one end to the other end, and the mass portion 340 of the elastic body 314 is inserted so as to be able to slide freely. A reinforcing portion 30 is formed on the cylindrical inner surface portion 324 b of the cylindrical body 322 of the fixed body 312 . The strength portion 30 is formed so that the long axis side of its approximately elliptical cross-sectional shape perpendicular to the long axis protrudes, and a recess 336 is formed in the cross-sectional shape perpendicular to the long axis, with a slope extending from the bottom having an arc-shaped cross-section.

[0091] The fixed body 312 further includes: The cylindrical engaging portion 28 is formed so as to protrude from the connecting portion 26 in the vicinity of the cylindrical outer surface portion 324a of the cylindrical body 322 so as to be connected to the connecting portion 26, and has a substantially cylindrical shape. The engagement cylindrical portion 28 has a gear chamber 27 that is generally cylindrical in shape and extends from approximately the center of one end of the engagement cylindrical portion 28 toward approximately the center of the cylindrical inner surface portion 324b of the fixed body 20 at the upper portion of the engagement cylindrical portion 28. The fixed body 312 has a side cylindrical engagement portion 29 which is formed in a substantially concentric cross-sectional shape perpendicular to the longitudinal direction of the engagement cylindrical portion 28 so as to protrude from the gear chamber 27 and to be connected to the gear chamber 27 near the end of the engagement cylindrical portion 28 inside the fixed body 312.

[0092] To ensure insulation, the fixed body 312 is made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0093] The telescopic body 314 has a long shaft portion 342 at the rear end of the mass portion 340. The long axis portion 342 is a cylindrical body having a generally elliptical cross section in a direction perpendicular to the long axis, and has strength portions 350 formed in upper and lower regions. The block portion 340 of the telescopic body 314 is a cylindrical block having a cross-sectional shape perpendicular to the long axis that is approximately elliptical, and a screw portion 344 consisting of a female screw portion is formed on the surface facing the hollow portion extending in the longitudinal axis direction. The reciprocating shaft 316 is attached to the screw portion 344 so as to threadably move. As shown in FIG. 9, the cross-sectional shape of the stretchable body 314 in the direction perpendicular to the long axis is substantially circular. The outer surface is formed with an elastic body outer surface portion 346a having a substantially circular cross-sectional shape in a direction perpendicular to the long axis. An expandable inner surface portion 346b having a substantially circular cross section in the direction perpendicular to the long axis is formed on the inner surface. In order to ensure insulation, the stretchable body 314 is also made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0094] The nut 370 constituting the block 340 is shown in FIG. 8 and 93, the cross section perpendicular to the long axis is generally elliptical, and the outer surface is formed with strength portion 350. Nut 370 is formed with nut outer surface portion 374a having a generally elliptical cross section perpendicular to the long axis, and is formed with first nut inner surface portion 374b having a generally circular cross section perpendicular to the long axis on its inner surface. On the nut outer surface portion 374a, an outward ridge portion 352 is formed which has an approximately arc-shaped cross section perpendicular to the long axis and faces the recess 336 of the fixed body 312, protruding from at least one apex on the long axis side of the approximately elliptical cross section perpendicular to the long axis. The ridges 352 form the strength portions 350 .

[0095] The nut 370 has a mounting hole 376 for mounting the nut 370 to the telescopic body 314. The nut 370 is attached to the telescopic body 314 by a screw that is screwed into the mounting hole 376 or a pin that is inserted into the mounting hole 376. In order to ensure electrical insulation, the nut 370 is also made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0096] The recess 336 of the fixed body 312 and the outward ridge portion 352 that constitutes the strength portion 350 of the nut 370 form a rotation prevention portion 360 that prevents the telescopic body 314 and the nut 370 from rotating around the longitudinal axis of the fixed body 312 inside the fixed body 312 as the rotation axis.

[0097] As shown in Figures 8 and 9, in this third embodiment of the rod-shaped telescopic device 310, the strength portion 350 of the mass portion 340 of the telescopic body 314 and the strength portion 30 of the fixed body 312 form a rotation prevention portion 360 that prevents the strength portion 30 of the fixed body 312 and the mass portion 340 of the telescopic body 314 from rotating around the central axis in the longitudinal direction of the fixed body 312 within the hollow portion of the fixed body 312. In this embodiment, the anti-rotation portion 360 is composed of a peak portion 352 constituting the strength portion 350 of the expandable body 314 and a recessed portion 336 formed in the strength portion 30 of the fixed body 312 . The anti-rotation portion 360 is provided at least at one location in the circumferential direction of the nut 370, or more than one location, specifically, at several locations as in the example configuration shown in FIG.

[0098] The fixed body 312 has a gear box 90 provided in a region where the connecting portion 26 and the engagement cylindrical portion 28 surround the gear chamber 27 .

[0099] The fixed body 312 has a gear box 90 formed in the fixed main body 20. The gear box 90 includes an insertion member 120, which is a substantially inverted stepped cylinder inserted into the engagement cylindrical portion 28, an input member 140 inserted into the insertion member 120, a first bevel gear 92, which is substantially in a chevron shape, attached to the input member 140, a second bevel gear 94, which is substantially in a chevron shape, attached to the reciprocating shaft 316, and a first cap 160, which is substantially in a cylindrical shape, inserted into both cylindrical outer surface portions 324a.

[0100] A reciprocating shaft 316 extending into the gear box 90 is attached to the connecting portion 26 by a bearing 98, and has a second bevel gear 94 attached to its tip. The input member 140 is attached to the engagement cylindrical portion 28 by a bearing 98, and has a first bevel gear 92 attached to its tip. Then, the second bevel gear 94 meshes with the first bevel gear 92 . The input member 140 is attached to the insertion member 120 via a bearing 98 so as to rotate by a rotating tool 800 engaged with the engagement portion 148 . The input member 140 is fitted inside the engagement cylindrical portion 28 of the fixed main body 20 .

[0101] Since the reinforcing portion 30 constitutes the anti-rotation portion 360, the rotation input applied to the reciprocating shaft 316 is converted into a force in the extension / retraction sliding direction without any loss, and an accurate extension / retraction function is ensured.

[0102] Thus, the present invention 3 A live line sorting tool according to an embodiment of the present invention 3It is possible to ensure the telescopic sliding function without using special anti-rotation parts and / or special reinforcing parts to prevent the fixed body 312, the telescopic body 314 and the mass portion 340 from being destroyed by forces applied to the fixed body 312, the telescopic body 314 and the strength portion 30.

[0103] (Fourth embodiment) A live-line distribution tool 4 according to a fourth embodiment of the present invention will now be described with reference to FIGS.

[0104] A rod-shaped extensible tool 410 of a live line sorting tool 4 according to the fourth embodiment of the present invention is an embodiment different from the rod-shaped extensible tool 10 of a live line sorting tool 1 according to the first embodiment of the present invention. The live line sorting tool 4 of the fourth embodiment of the present invention differs from the rod-shaped telescopic device 10 of the live line sorting tool 1 of the first embodiment of the present invention in that the fixed body 12, the telescopic body 14, the strength portion 30, the reciprocating shaft 16, the strength portion 50 and the anti-rotation portion 60 of the live line sorting tool 1 of the first embodiment of the present invention are replaced by a fixed body 412, an telescopic body 414, a nut 470, a reciprocating shaft 416 and an anti-rotation portion 460. In particular, the difference is that the mass portion 40 of the telescopic body 14 is constituted by a nut 470 . For this reason, with regard to the rod-shaped telescopic device 410 of the live line sorting tool 4 according to the fourth embodiment of the present invention, explanations will be omitted for all points other than the fixed body 412, the telescopic body 414, the nut 470, the reciprocating shaft 416 and the anti-rotation portion 460.

[0105] The rod-shaped telescopic device 410 of the live line distribution tool 4 of the fourth embodiment shown in Figure 10 comprises an insulating fixed body 412, an expandable body 414 inserted into the hollow portion of the fixed body 412 so as to be freely movable in the longitudinal direction and connected thereto, a reciprocating shaft 416 arranged on the axial center of the fixed body 412 and the expandable body 414, and an expansion force imparting mechanism 418 arranged at the end of the reciprocating shaft 416. When the rotating tool 800 is operated to activate the expansion / contraction force imparting mechanism 418 and rotate the reciprocating shaft 416, the expansion / contraction body 414 moves in the longitudinal direction within the hollow space of the fixed body 412 in a rotation-preventing state. The fixed body 412 and the expandable body 414 are formed with a strength portion 30 and a mass portion 440 in the region close to the opposing faces, which strengthen the strength against bending upward and / or downward in the vertical direction. The strength portion 30 is formed on the fixed body 412 , and the mass portion 440 is formed on the elastic body 414 .

[0106] The nut 470 disposed on the telescopic body 414 constitutes the mass 440 . The rod-shaped telescopic device 10 is configured such that when the reciprocating shaft 416 is rotated from the outside, the long shaft portion 42 constituting the telescopic body 414 telescopically slides within the fixed body 412 together with the nut 470 constituting the strength portion.

[0107] The fixed body 412 is It is hollow, and the cross section of the hollow portion perpendicular to the long axis is substantially circular, and has a cylindrical outer surface portion 424a on the outside thereof and a cylindrical inner surface portion 24b on the inside thereof. The fixed body 20 of the fixed body 412 has connecting portions 26 at both ends, each of which has a substantially cylindrical shape. The cylindrical body 422 of the fixed body 412 has a cylindrical inner surface portion 424b whose cross-sectional shape perpendicular to the long axis is approximately elliptical, and in which the outer surface of the mass portion 440 of the elastic body 414 contacts the strength portion 30 inside the fixed body 412 from one end to the other end, and the mass portion 440 of the elastic body 14 is inserted so as to be able to slide freely. A reinforcing portion 30 is formed on a cylindrical inner surface portion 424 b of the cylindrical body 422 of the fixed body 412 . The strength portion 30 has a cross-sectional shape perpendicular to its long axis, which is an approximately elliptical shape on the long axis side, and has an inward groove portion 434 whose cross-sectional shape perpendicular to the long axis has an inwardly facing groove portion 434 with an inclined surface extending from the bottom that has an arc-shaped cross section.

[0108] The fixed body 412 further includes: The cylindrical body 422 has an engagement cylindrical portion 28 that is formed so as to protrude from the connecting portion 26 in the vicinity of the cylindrical outer surface portion 424a of the cylindrical body 422 so as to be connected to the connecting portion 26, and has a substantially cylindrical shape. The engagement cylindrical portion 28 has a gear chamber 27 that is generally cylindrical in shape and extends from approximately the center of one end of the engagement cylindrical portion 28 toward approximately the center of the cylindrical inner surface portion 424b of the fixed body 20 at the upper portion of the engagement cylindrical portion 28. The fixed body 412 has a side cylindrical engagement portion 29 that is connected to the gear chamber 27 from the gear chamber 27 near the end of the engagement cylindrical portion 28 inside the fixed body 412 and protrudes from the gear chamber 27, and its cross-sectional shape perpendicular to the longitudinal direction of the engagement cylindrical portion 28 is formed in an approximately concentric shape with the connecting portion 26.

[0109] To ensure insulation, stationary body 412 is made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0110] The telescopic body 414 has a long shaft portion 442 at the rear end of the mass portion 440. The long axis portion 442 is a cylindrical body having a generally elliptical cross section in a direction perpendicular to the long axis, and has strength portions 450 formed in the upper and lower regions. The block 440 is a cylindrical block having a generally elliptical cross section perpendicular to its long axis, and a screw portion 444 consisting of a female screw is formed on the surface facing the hollow portion extending in the longitudinal direction. The reciprocating shaft 416 is attached to the screw portion 444 so as to threadably move. As shown in FIGS. 10 and 11, the cross-sectional shape of the stretchable body 414 in the direction perpendicular to the long axis is substantially circular. The outer surface is formed with an elastic body outer surface portion 446a having a substantially circular cross-sectional shape in a direction perpendicular to the long axis, An expandable inner surface portion 446b having a substantially circular cross section in the direction perpendicular to the long axis is formed on the inner surface. In order to ensure insulation, the stretchable body 414 is also made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0111] 10 and 11, nut 470 constituting block portion 440 has a substantially double-arc sectional shape in the direction perpendicular to the long axis, and has strength portion 450 formed on its outer surface. Nut 470 has nut outer surface portion 474a having a substantially double-arc sectional shape in the direction perpendicular to the long axis, and has a first nut inner surface portion 474b having a substantially circular sectional shape in the direction perpendicular to the long axis formed on its inner surface. On the nut outer surface portion 474a, an outwardly facing ridge portion 452 is formed which has a rounded-tip cross-sectional shape in the long axis perpendicular direction and faces the inwardly facing groove portion 434 of the fixed body 412 so as to protrude from at least one vertex on the long axis side of the approximately elliptical cross-sectional shape in the long axis perpendicular direction. The peaks 452 form the strength portions 450 of the elastic body 414 .

[0112] The nut 470 has a mounting hole 476 for mounting the nut 470 to the telescopic body 414. The nut 470 is attached to the telescopic body 414 by a screw that is threaded into the mounting hole 476 or a pin that is inserted into the mounting hole 476. In order to ensure electrical insulation, the nut 470 is also made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0113] The inward groove portion 434 of the fixed body 412 and the outward ridge portion 452 of the nut 470 form a rotation prevention portion 460 that prevents the telescopic body 414 and the nut 470 from rotating around the longitudinal axis of the fixed body 412 inside the fixed body 412 as the rotation axis. As shown in Figures 10 and 11, in the rod-shaped telescopic device 410 of this fourth embodiment, the strength portion 450 of the mass portion 440 of the telescopic body 414 and the strength portion 30 of the fixed body 412 form a rotation prevention portion 460 that prevents the strength portion 30 of the fixed body 412 and the mass portion 440 of the telescopic body 414 from rotating around the central axis in the longitudinal direction of the fixed body 412 within the hollow portion of the fixed body 412. In this embodiment, the anti-rotation portion 460 is composed of a peak portion 452 constituting the strength portion 450 of the expandable body 414 and a groove portion 434 formed in the strength portion 30 of the fixed body 412 . The anti-rotation portion 460 is provided at least in one position in the circumferential direction of the nut 470, or more than one position, specifically, an appropriate number of positions as in the example configuration shown in FIG.

[0114] The fixed body 412 has a gear box 90 provided in a region where the connecting portion 26 and the engagement cylindrical portion 28 surround the gear chamber 27 .

[0115] The fixed body 412 has a gear box 90 formed in the fixed main body 20. The gear box 90 includes an insertion member 120, which is a substantially inverted stepped cylinder inserted into the engagement cylindrical portion 28, an input member 140 inserted into the insertion member 120, a first bevel gear 92, which is substantially in a chevron shape, attached to the input member 140, a second bevel gear 94, which is substantially in a chevron shape, attached to the reciprocating shaft 416, and a first cap 160, which is substantially in a cylindrical shape, inserted into both cylindrical outer surface portions 424a.

[0116] A reciprocating shaft 416 extending into the gear box 90 is attached to the connecting portion 26 by a bearing 98, and has a second bevel gear 94 attached to its tip. The input member 140 is attached to the engagement cylindrical portion 28 by a bearing 98, and has a first bevel gear 92 attached to its tip. Then, the second bevel gear 94 meshes with the first bevel gear 92 . The input member 140 is attached to the insertion member 120 via a bearing 98 so as to rotate by a rotating tool 800 engaged with the engagement portion 148 .

[0117] Since the reinforcing portion 30 constitutes the anti-rotation portion 460, the rotation input applied to the reciprocating shaft 416 is converted into a force in the extension / retraction sliding direction without any loss, and an accurate extension / retraction function is ensured.

[0118] Thus, the present invention 4 A live line sorting tool according to an embodiment of the present invention 4It is possible to ensure the telescopic sliding function without using special anti-rotation parts and / or special reinforcing parts to prevent the fixed body 412, the telescopic body 414 and the mass portion 440 from being destroyed by forces applied to the fixed body 412, the telescopic body 414 and the strength portion 30.

[0119] (Fifth embodiment) Hereinafter, a rod-shaped extender 510 of a live-line sorting tool 5 according to a fifth embodiment of the present invention will be described with reference to FIGS.

[0120] A rod-shaped extensible tool 510 of a live line sorting tool 5 according to the fifth embodiment of the present invention is an embodiment different from the rod-shaped extensible tool 10 of a live line sorting tool 1 according to the first embodiment of the present invention. The rod-shaped telescopic device 510 of the live line sorting tool 5 of the fifth embodiment of the present invention differs from the rod-shaped telescopic device 10 of the live line sorting tool 1 of the first embodiment of the present invention in that the fixed body 12, the telescopic body 14, the strength section 30, the reciprocating shaft 16, the strength section 50 and the anti-rotation section 60 of the live line sorting tool 1 of the first embodiment of the present invention are replaced by a fixed body 512, an extensible body 514, a nut 570, a reciprocating shaft 516 and an anti-rotation section 560. In particular, the difference is that the mass portion 40 of the telescopic body 14 is constituted by a nut 570 . For this reason, with regard to the rod-shaped telescopic device 510 of the live line sorting tool 5 according to the fifth embodiment of the present invention, explanations will be omitted except for the fixed body 512, the telescopic body 514, the nut 570, the reciprocating shaft 516 and the anti-rotation portion 560.

[0121] The rod-shaped telescopic device 510 of the live line distribution tool 5 of the fifth embodiment shown in Figure 12 comprises an insulating fixed body 512, an expandable body 514 inserted into the hollow portion of the fixed body 512 so as to be freely movable in the longitudinal direction and connected thereto, a reciprocating shaft 516 arranged on the axial center of the fixed body 512 and the expandable body 514, and an expansion force imparting mechanism 518 arranged at the end of the reciprocating shaft 516. When the rotating tool 800 is operated to activate the expansion / contraction force imparting mechanism 518 and rotate the reciprocating shaft 516, the expansion / contraction body 514 moves in the longitudinal direction within the hollow portion of the fixed body 512 in a rotation-preventing state. The fixed body 512 and the expandable body 514 are formed with a strength portion 30 and a mass portion 540 in the region close to the opposing faces, which strengthen the strength against bending upward and / or downward in the vertical direction. The strength portion 30 is formed on the fixed body 512 , and the mass portion 540 is formed on the expandable body 514 .

[0122] The nut 570 disposed on the telescopic body 514 constitutes the mass 540 . The rod-shaped telescopic device 10 is configured such that, when the reciprocating shaft 516 is rotated from the outside, the long shaft portion 42 constituting the telescopic body 514 telescopically slides within the fixed body 512 together with the nut 570 constituting the strength portion.

[0123] The fixed body 512 is It is hollow, and the cross section of the hollow portion in the direction perpendicular to the long axis is substantially circular, and has a cylindrical outer surface portion 524a on the outside thereof and a cylindrical inner surface portion 524b on the inside thereof. The fixed body 20 of the fixed body 512 has connecting portions 26 at both ends, each of which has a substantially cylindrical shape. The cylindrical body 522 of the fixed body 512 has a cylindrical inner surface portion 524b whose cross-sectional shape perpendicular to the long axis is approximately elliptical, and in which the outer surface of the mass portion 540 of the elastic body 514 contacts the strength portion 30 inside the fixed body 512 from one end to the other end, and the mass portion 540 of the elastic body 514 is inserted so as to be able to slide freely. The cylindrical body 522 of the fixed body 512 has a cylindrical inner surface portion 524b on which a strength portion 30 is formed. The strength portion 30 is formed so that the long axis side of its approximately elliptical cross-sectional shape perpendicular to the long axis protrudes, and a groove portion 534 is formed in which the cross-sectional shape perpendicular to the long axis has a slope extending from the bottom and has an arc-shaped cross-sectional shape.

[0124] The fixed body 512 further includes: The cylindrical body 522 has an engagement cylindrical portion 28 formed to protrude from the connecting portion 26 in the vicinity of the cylindrical outer surface portion 524a of the cylindrical body 522 so as to be connected to the connecting portion 26, and the engagement cylindrical portion 28 has a substantially cylindrical shape. The engagement cylindrical portion 28 has a gear chamber 27 that is generally cylindrical and extends from approximately the center of one end of the engagement cylindrical portion 28 toward approximately the center of the cylindrical inner surface portion 524b of the fixed body 20 at the top of the engagement cylindrical portion 28. The fixed body 512 has a side cylindrical locking portion 29 that is connected to the gear chamber 27 from the gear chamber 27 near the end of the engaging cylindrical portion 28 inside the fixed body 512 and protrudes from the gear chamber 27, and its cross-sectional shape perpendicular to the longitudinal direction of the engaging cylindrical portion 28 is formed in an approximately concentric shape with the connecting portion 26.

[0125] To ensure insulation, stationary body 512 is made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0126] The telescopic body 514 has a long shaft portion 542 at the rear end of the mass portion 540. Long axis portion 542 is a cylindrical body having a generally elliptical cross section in a direction perpendicular to the long axis, and strength portions 550 are formed in the upper and lower regions. Block portion 540 is a cylindrical block having a generally elliptical cross section perpendicular to its long axis, and a screw portion 544 consisting of a female screw is formed on the surface facing the hollow portion extending in the longitudinal axis direction. The reciprocating shaft 516 is attached to the screw portion 544 so as to threadably move. As shown in FIGS. 12 and 13, the cross-sectional shape of the stretchable body 514 in the direction perpendicular to the long axis is substantially circular. The outer surface is formed with an elastic body outer surface portion 546a having a substantially circular cross-sectional shape in the direction perpendicular to the long axis, An expandable inner surface portion 546b having a substantially circular cross section in the direction perpendicular to the long axis is formed on the inner surface. In order to ensure insulation, the stretchable body 514 is also made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0127] 12 and 13, nut 570 forming mass portion 540 has a substantially circular cross section in the direction perpendicular to the long axis, and has strength portion 550 formed on its outer surface. Nut 570 has nut outer surface portion 574a having a substantially circular cross section in the direction perpendicular to the long axis, and has a first nut inner surface portion 574b having a substantially circular cross section in the direction perpendicular to the long axis formed on its inner surface. On the nut outer surface portion 574a, an outwardly facing ridge portion 552 is formed which protrudes from the nut outer surface portion 574a and faces the groove portion 534 of the fixed body 512, and whose cross-sectional shape perpendicular to the long axis is an arc-shaped slope extending from the peak. The peaks 552 constitute the strength portions 550 of the elastic body 514 . The block 540 is a cylindrical body that is shorter than the long axis portion 542 of the stretchable body 514, and is a block that is concentric with the cylindrical stretchable body 514 and thicker than the stretchable body 514. In this embodiment, the diameter of the block 540 is 1.3 to 1.8 times the diameter of the long axis portion 542 of the stretchable body 514. The peak portion 552 is in the shape of a mountain protruding outward from a nut outer surface portion 2574a of the nut 570 (of the block portion 540), and is in the form of a stripe having the same cross-sectional shape extending in the left-right direction. The peaks 552 are shaped to fit into grooves 534 formed in the fixed body 512, which will be described later, and are configured to slide along the grooves 534 in the direction in which the grooves 534 extend. The mass 640 (nut 670) is a cylindrical body that is shorter than the telescopic body 614, and is a mass that is concentric with the cylindrical telescopic body 614 and thicker than the telescopic body 614. In this embodiment, the diameter of the mass 640 is 1.3 to 1.8 times the diameter of the telescopic body 614.

[0128] The nut 570 has a mounting hole 576 for mounting the nut 570 to the telescopic body 514. The nut 570 is attached to the telescopic body 514 by a screw that is threaded into the mounting hole 576 or a pin that is inserted into the mounting hole 576. In order to ensure electrical insulation, the nut 570 is also made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0129] The groove portion 534 of the fixed body 512 and the peak portion 552 of the nut 570 form a rotation prevention portion 560 that prevents the telescopic body 514 and the nut 570 from rotating around the longitudinal axis of the fixed body 512 inside the fixed body 512 as the rotation axis. As shown in Figures 12 and 13, in the fifth embodiment of the rod-shaped telescopic device 510, the strength portion 550 of the mass portion 540 of the telescopic body 514 and the strength portion 30 of the fixed body 512 form a rotation prevention portion 560 that prevents the strength portion 30 of the fixed body 512 and the mass portion 540 of the telescopic body 514 from rotating around the central axis in the longitudinal direction of the fixed body 512 within the hollow portion of the fixed body 512. In this embodiment, the anti-rotation portion 560 is composed of a peak portion 552 constituting the strength portion 550 of the expandable body 514 and a groove portion 534 formed in the strength portion 30 of the fixed body 512 .

[0130] The anti-rotation portion 560 is provided at least in one position in the circumferential direction of the nut 570, or more than one position, specifically, an appropriate number of positions as in the example configuration shown in FIG.

[0131] The rod-shaped extender 510 of the live line sorting tool 5 according to the fifth embodiment of the present invention may have at least five anti-rotation portions 560 formed by the groove portion 534 of the fixed body 512 and the nut 570, or may have six. The live line distribution tool 5 of the fifth embodiment of the present invention, when having five or six anti-rotation portions 560, can better prevent the telescopic body 514 and the nut 570 from rotating around the longitudinal axis of the fixed body 512 as the rotation axis than when having one or two anti-rotation portions 560. The live line distribution tool 5 of the fifth embodiment of the present invention, when having five or six anti-rotation portions 560, can more firmly attach the nut 570 to the expandable body 514 by providing an attachment hole 576 for attaching the nut 570 to the expandable body 514 than when having one or two anti-rotation portions 560.

[0132] The fixed body 512 has a gear box 90 provided in a region where the connecting portion 26 and the engagement cylindrical portion 28 surround the gear chamber 27 .

[0133] The fixed body 512 has a gear box 90 formed in the fixed main body 20. The gear box 90 includes an insertion member 120, which is a substantially inverted stepped cylinder inserted into the engagement cylindrical portion 28, an input member 140 inserted into the insertion member 120, a first bevel gear 92, which is substantially in a chevron shape, attached to the input member 140, a second bevel gear 94, which is substantially in a chevron shape, attached to the reciprocating shaft 516, and a first cap 160, which is substantially in a cylindrical shape, inserted into both cylindrical outer surface portions 524a.

[0134] A reciprocating shaft 516 extending into the gear box 90 is attached to the connecting portion 26 by a bearing 98, and has a second bevel gear 94 attached to its tip. The input member 140 is attached to the engagement cylindrical portion 28 by a bearing 98, and has a first bevel gear 92 attached to its tip. Then, the second bevel gear 94 meshes with the first bevel gear 92 . The input member 140 is attached to the insertion member 120 via a bearing 98 so as to rotate by a rotating tool 800 engaged with the engagement portion 148 . The input member 140 is fitted inside the engagement cylindrical portion 28 of the fixed main body 20 .

[0135] Since the strength portion 30 constitutes the anti-rotation portion 560, the rotation input applied to the reciprocating shaft 516 is converted into a force in the extension / retraction sliding direction without any loss, and an accurate extension / retraction function is ensured.

[0136] Thus, the present invention 5 A live line sorting tool according to an embodiment of the present invention5 It is possible to ensure the telescopic sliding function without using special anti-rotation parts and / or special reinforcing parts to prevent the fixed body 512, the telescopic body 514 and the mass portion 540 from being destroyed by forces applied to the fixed body 512, the telescopic body 514 and the strength portion 30.

[0137] (Modification of the fifth embodiment) In the rod-shaped extender 510 of the fifth embodiment, as shown in FIG. 14, the crest 552 constituting the strength portion 550 formed on the nut 570 may be configured with a plurality of crests 552 .

[0138] (Sixth embodiment) Hereinafter, a rod-shaped extender 610 of a live line sorting tool 6 according to a sixth embodiment of the present invention will be described with reference to FIGS.

[0139] A rod-shaped extensible tool 610 of a live line sorting tool 6 according to the sixth embodiment of the present invention is an embodiment different from the rod-shaped extensible tool 10 of a live line sorting tool 1 according to the first embodiment of the present invention. The rod-shaped telescopic device 610 of the live line sorting tool 6 of the sixth embodiment of the present invention differs from the rod-shaped telescopic device 10 of the live line sorting tool 1 of the first embodiment of the present invention in that the fixed body 12, the telescopic body 14, the strength section 30, the reciprocating shaft 16, the strength section 50 and the anti-rotation section 60 of the live line sorting tool 1 of the first embodiment of the present invention are replaced by a fixed body 612, an telescopic body 614, a nut 670, a reciprocating shaft 616 and an anti-rotation section 660. In particular, the difference is that the mass portion 40 of the telescopic body 14 is constituted by a nut 670 . For this reason, with regard to the rod-shaped telescopic device 610 of the live line sorting tool 6 according to the sixth embodiment of the present invention, explanations will be omitted except for the fixed body 612, the telescopic body 614, the nut 670, the reciprocating shaft 616 and the anti-rotation portion 660.

[0140] The rod-shaped telescopic device 610 of the live line distribution tool 6 of the sixth embodiment shown in Figure 15 comprises an insulating fixed body 612, an expandable body 614 inserted into the hollow portion of the fixed body 612 so as to be freely movable in the longitudinal direction and connected thereto, a reciprocating shaft 616 arranged on the axial center of the fixed body 612 and the expandable body 614, and an expansion force imparting mechanism 618 arranged at the end of the reciprocating shaft 616. When the rotating tool 800 is operated to activate the expansion / contraction force imparting mechanism 618 and rotate the reciprocating shaft 616, the expansion / contraction body 614 moves in the longitudinal direction within the hollow portion of the fixed body 612 in a rotation-preventing state. The fixed body 612 and the expandable body 614 are formed with a strength portion 630 and a mass portion 640 in the region close to the opposing faces, which strengthen the strength against bending upward and / or downward in the vertical direction. The strength portion 630 is formed on the fixed body 612 and the mass portion 640 is formed on the elastic body 614 .

[0141] The nut 670 disposed on the telescopic body 614 constitutes the mass 640 . The rod-shaped telescopic device 10 is configured such that, when the reciprocating shaft 616 is rotated from the outside, the long shaft portion 42 constituting the telescopic body 614 telescopically slides within the fixed body 612 together with the nut 670 constituting the strength portion.

[0142] The fixed body 612 is It is hollow, and the cross section of the hollow portion in the direction perpendicular to the long axis is substantially circular, and has a cylindrical outer surface portion 624a on the outside thereof and a cylindrical inner surface portion 624b on the inside thereof. The fixed body 20 of the fixed body 612 has connecting portions 26 at both ends, which are substantially cylindrical in shape. The cylindrical body 622 of the fixed body 612 has an outer surface of the mass portion 640 of the elastic body 614 in contact with the strength portion 630 inside the fixed body 612 from one end to the other end, and has a cylindrical inner surface portion 624b whose cross-sectional shape perpendicular to the long axis is approximately elliptical, and into which the mass portion 640 of the elastic body 614 is inserted so as to be able to slide freely. A reinforcing portion 630 is formed on the cylindrical inner surface portion 624 b of the cylindrical body 622 of the fixed body 612 . The strength portion 630 is formed so that the long axis side of the approximately elliptical cross-sectional shape perpendicular to the long axis protrudes, and an inward-facing ridge portion 632 is formed on the cylindrical inner surface portion 624b, the cross-sectional shape perpendicular to the long axis of which has a slope extending from the peak and having an arc-shaped cross-section.

[0143] The fixed body 612 further includes: The cylindrical body 622 has an engagement cylindrical portion 28 that is formed so as to protrude from the connecting portion 26 in the vicinity of the cylindrical outer surface portion 624a of the cylindrical body 622 so as to be connected to the connecting portion 26, and has a substantially cylindrical shape. The engagement cylindrical portion 28 has a gear chamber 27 that is approximately cylindrical in shape and extends from approximately the center of one end of the engagement cylindrical portion 28 toward approximately the center of the cylindrical inner surface portion 624b of the fixed body 20 at the upper portion of the engagement cylindrical portion 28. The fixed body 612 has a side cylindrical engagement portion 29 that is connected to the gear chamber 27 from the gear chamber 27 near the end of the engagement cylindrical portion 28 inside the fixed body 612 and protrudes from the gear chamber 27, and its cross-sectional shape perpendicular to the longitudinal direction of the engagement cylindrical portion 28 is formed in an approximately concentric shape with the connecting portion 26.

[0144] To ensure insulation, the fixed body 612 is made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0145] The telescopic body 614 has a long shaft portion 642 at the rear end of the mass portion 640. The long axis portion 642 is a cylindrical body having a generally elliptical cross section in a direction perpendicular to the long axis, and has strength portions 650 formed in the upper and lower regions. The block 640 is a cylindrical block having a generally elliptical cross section perpendicular to its long axis, and a screw portion 644 consisting of a female screw is formed on the surface facing the hollow portion extending in the longitudinal axis direction. The reciprocating shaft 616 is attached to the screw portion 644 so as to threadably move. As shown in FIGS. 15 and 16, the cross-sectional shape of the stretchable body 614 in the direction perpendicular to the long axis is substantially circular. The outer surface is formed with an elastic body outer surface portion 646a having a substantially circular cross-sectional shape in the direction perpendicular to the long axis, An expandable inner surface portion 646b having a substantially circular cross section in the direction perpendicular to the long axis is formed on the inner surface. In order to ensure insulation, the elastic body 614 is also made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0146] 15 and 16, the nut 670 constituting the block portion 640 has a substantially circular cross section in the direction perpendicular to the long axis, and has a strength portion 650 formed on its outer surface. The nut 670 has a nut outer surface portion 674a having a substantially circular cross section in the direction perpendicular to the long axis, and a first nut inner surface portion 674b having a substantially circular cross section in the direction perpendicular to the long axis formed on its inner surface. An outward groove 654 having a V-shaped cross section is formed on the nut outer surface portion 674a from the nut outer surface portion 674a toward the inside of the nut 670.

[0147] The nut 670 has a mounting hole 676 for mounting the nut 670 to the telescopic body 614. The nut 670 is attached to the telescopic body 614 by a screw that is threaded into the mounting hole 676 or a pin that is inserted into the mounting hole 676. In order to ensure electrical insulation, the nut 670 is also made of FRP, which is a reinforced plastic made by compounding epoxy resin, phenolic resin, or the like with fibers such as glass fiber or aramid fiber to improve strength.

[0148] The inward ridge 632 of the fixed body 612 and the outward groove 654 of the nut 670 form a rotation prevention portion 660 that prevents the telescopic body 614 and the nut 670 from rotating around the longitudinal axis of the fixed body 612 inside the fixed body 612. The rod-shaped extender 610 of the sixth embodiment is shown in FIG. 15 and 16As shown in FIG. 1, the strength portion 650 of the mass portion 640 of the elastic body 614 and the strength portion 630 of the fixed body 612 form a rotation prevention portion 660 that prevents the strength portion 630 of the fixed body 612 and the mass portion 640 of the elastic body 614 from rotating around the central axis of the fixed body 612 in the longitudinal direction within the hollow portion of the fixed body 612. In this embodiment, the anti-rotation portion 660 is composed of a groove portion 654 formed in the strength portion 650 of the expandable body 614 and a ridge portion 632 constituting the strength portion 630 of the fixed body 612 . The peaks 632 are mountain-shaped and protrude outward from the cylindrical inner surface portion 624b of the fixed body 612, and are stripes of the same shape in cross section that extend in the left-right direction. The peaks 632 are shaped to fit into grooves 654 formed in a nut 670 (described later), and the grooves 654 are configured to slide along the direction in which the peaks 632 extend.

[0149] The anti-rotation portion 660 is provided at least at one location, or more than one location, in the circumferential direction of the nut 670 .

[0150] The live line distribution tool 6 of the sixth embodiment of the present invention may have at least five, or may have six, anti-rotation portions 660 formed by the inward ridge portions 632 of the fixed body 612 and the outward groove portions 654 of the nut 670. The live line distribution tool 6 of the sixth embodiment of the present invention, when having five or six anti-rotation portions 660, can better prevent the telescopic body 614 and the nut 670 from rotating around the longitudinal axis of the fixed body 612 as the rotation axis than when having one or two anti-rotation portions 660. The live line distribution tool 6 of the sixth embodiment of the present invention, when having five or six anti-rotation portions 660, can more firmly attach the nut 670 to the expandable body 614 by providing an attachment hole 676 for attaching the nut 670 to the expandable body 614 than when having one or two anti-rotation portions 660.

[0151] The fixed body 612 further includes: The cylindrical body 622 has an engagement cylindrical portion 28 that is formed so as to protrude from the connecting portion 26 in the vicinity of the cylindrical outer surface portion 624a of the cylindrical body 622 so as to be connected to the connecting portion 26, and has a substantially cylindrical shape. The engagement cylindrical portion 28 has a gear chamber 27 that is approximately cylindrical in shape and extends from approximately the center of one end of the engagement cylindrical portion 28 toward approximately the center of the cylindrical inner surface portion 624b of the fixed body 20 at the upper portion of the engagement cylindrical portion 28. The fixed body 612 has a side cylindrical engagement portion 29 that is connected to the gear chamber 27 from the gear chamber 27 near the end of the engagement cylindrical portion 28 inside the fixed body 612 and protrudes from the gear chamber 27, and its cross-sectional shape perpendicular to the longitudinal direction of the engagement cylindrical portion 28 is formed in an approximately concentric shape with the connecting portion 26.

[0152] Since the strength portion 630 constitutes the anti-rotation portion 660, the rotation input applied to the reciprocating shaft 616 is converted into a force in the extension / retraction sliding direction without any loss, and an accurate extension / retraction function is ensured.

[0153] Thus, the present invention 6 A live line sorting tool according to an embodiment of the present invention 6 It is possible to ensure the telescopic sliding function without using special anti-rotation parts and / or special reinforcing parts to prevent the fixed body 612, the telescopic body 614 and the mass portion 640 from being destroyed by forces applied to the fixed body 612, the telescopic body 614 and the strength portion 630.

[0154] (Modification of the sixth embodiment) In the rod-shaped telescopic device 610 of the sixth embodiment, as shown in FIG. 17, the crests 652 and grooves 654 constituting the strength portion 650 formed on the nut 670 may be configured as a combination of multiple crests 652 and grooves 654.

[0155] As described above, the embodiment of the present invention has been disclosed in the above description, but the present invention is not limited thereto. In other words, various modifications can be made to the above-described embodiments in terms of mechanism, shape, material, quantity, position, arrangement, etc. without departing from the scope of the technical idea and purpose of the present invention, and these are included in the present invention. For example, the elastic body may have a mass located in the middle of the long axis portion, or one of the long axis portions extending from the mass portion to both ends may be relatively short. The ridges and grooves or recesses function as anti-rotation portions, but these do not necessarily have to be present in the mass portion or strength portion, and may be formed on part of the surface of the long shaft portion. [Explanation of symbols]

[0156] 1,2,3,4,5,6 Live wire sorting tool 10,210,310,410,510,610 Rod expander 12,212,312,412,512,612 Fixed body 14,214,314,414,514,614 Stretchable body 16,216,316,416,516,616 Reciprocating axis 18,218,318,418,518,618 Stretching force applying mechanism 20 Fixed body 22,222,322,422,522,622 Cylindrical body 24a, 224a, 324a, 424a, 524a, 624a Cylindrical outer surface 24b, 224b, 324b, 424b, 524b, 624b Cylindrical inner surface 26 Connecting part 27 Gear Room 28 Engagement cylindrical part 29 Side cylindrical locking part 30,630 (Fixed body) Strength part 32,632 (Fixed body) mountain 234, 434,534 (fixed body) groove 336 (of a fixed body) recess 40,240,340,440,540,640 (elastic) mass 42,242,342,442,542,642 (long shaft of telescopic body) 44,244,344,444,544,644 (Telescopic) Threaded Part 46a,246a, 3 46a,446a,546a,646a Extendable outer surface part 46b,246b, 3 46b,446b,546b,646b Expandable inner surface part 50,250,350,450,550,650 (Stretchable body) Strength section 52,252,352,452,552,652 (stretchable) peak 54,654 Groove 60,260,360,460,560,660 Anti-rotation part 70,370,470,570,670 Nut 374a, 474a, 574a, 674a Nut outer surface 374b, 474b, 574b, 674b First nut inner surface 376,476,576,676 Mounting holes 90 Gearbox (stretching force applying mechanism) 92 First bevel gear 94 Second bevel gear 98 Bearings 120 Insertion member 122 First insert side portion 124 Second Insertion Side 126 Insertion hole 140 Input member 142 Input section 144 First input shaft 146 Second input shaft 148 Engagement part 160 1st Cap 162 (of the first cap) first cap end 164 (first cap) cap side portion 166 (of the first cap) cap end 170 2nd Cap 172 (Second cap) fitting portion 174 (Second Cap) Cover 800 Rotating Tool 900 Wire gripper 902 1st wire gripper 904 2nd wire gripper 906 Power distribution line support 908 Power distribution line support C1 Area for inserting the wire in the wire support W electric wire P1 First part of the wire P2 Second part of the wire

Claims

1. A rod-shaped telescopic device comprising a fixed body, a telescopic body connected to a cylindrical inner surface of the fixed body so as to be freely movable in the longitudinal direction, and a reciprocating shaft disposed on the axis of the fixed body, wherein when the reciprocating shaft rotates, the telescopic body moves in the longitudinal direction within the fixed body in a non-rotating state, A rod-shaped stretcher, characterized in that the fixed body and / or the stretchable body have strength parts at the top and / or bottom in the vertical direction in the area close to the opposing faces, which strengthen the strength against bending.

2. A rod-shaped telescopic device comprising a fixed body, a telescopic body connected to a cylindrical inner surface of the fixed body so as to be freely movable in the longitudinal direction, and a reciprocating shaft disposed on the axis of the fixed body, wherein when the reciprocating shaft rotates, the telescopic body moves in the longitudinal direction within the fixed body in a non-rotating state, A rod-shaped stretcher for a live wire sorting tool, characterized in that the fixed body and / or the stretchable body have strength parts at the top and / or bottom in the vertical direction in the area near the opposing faces that enhance strength against bending.

3. The rod-shaped stretcher according to claim 1 or 2, characterized in that the stretchable body is a rod-shaped body with an elliptical cross section, the long axis passing through the center of the ellipse extending vertically, and is formed to enhance strength against bending.

4. The strength portion formed on the fixed body and / or the expandable body comprises a groove portion formed on one side of the fixed body and a peak portion formed on the other side of the expandable body disposed inside the fixed body in a region where the fixed body and the expandable body disposed inside face each other, The rod-shaped telescopic device according to claim 1 or 2, wherein the groove portion has a slope extending from its groove bottom that is arc-shaped in cross section, and the peak portion has a slope extending from its peak that is arc-shaped in cross section, and the groove portion and the peak portion are configured to face each other and be in contact with each other.

5. A rod-shaped telescopic device as described in claim 1 or 2, characterized in that the strength portion formed on the fixed body and / or the telescopic body constitutes a rotation prevention portion that restricts rotation around the axis of the telescopic body, and the rotation prevention portion is composed of at least a pair of groove portions and ridge portions.

6. The stretchable body includes a strength portion and a long axis portion extending from a rear end of the strength portion, The rod-shaped telescopic device according to claim 1 or 2, wherein the strength portion and / or the long axis portion are configured by a groove portion or a ridge portion in the area where the fixed body and the telescopic body arranged inside thereof face each other.

7. The stretchable body includes a strength portion and a long axis portion extending from a rear end of the strength portion, The rod-shaped telescopic device according to claim 1 or 2, wherein the telescopic body is provided with a nut arranged on the long shaft portion concentrically with the axis of the cylindrical body, and the nut is formed with a ridge portion or a groove portion constituting a strength portion and a rotation prevention portion in an area facing the fixed body.

8. The rod-shaped telescopic device according to claim 1 or 2, characterized in that the nut has the mountain portion or the groove portion constituting the anti-rotation portion formed on the surface facing the fixed body, and is screwed onto the screw shaft constituting the long shaft portion on the opposite side to the direction of extension.

9. The strength portion formed on the fixed body and / or the expandable body constitutes a rotation prevention portion, The anti-rotation portion is The fixing member has an inner wall surface and an outer ridge portion formed on the inner wall surface of the fixing member. The fixing member has an inner wall surface and an outer ridge portion formed on the inner wall surface of the fixing member. Or, 3. The rod-shaped telescopic device according to claim 1 or 2, characterized in that it is composed of an inward ridge portion formed on the inner wall surface of the fixed body and an outward groove portion formed on the surface of the telescopic body facing the inner wall surface of the fixed body.

10. The device comprises a fixed body, a telescopic body fitted in a hollow portion of the fixed body so as to be freely movable in the longitudinal direction, and a reciprocating shaft disposed on an axis of the fixed body, A rod-shaped telescopic device is disposed on the axis of the fixed body, and includes a strength portion and a rotation-stop portion formed on the long shaft portion of the telescopic body, and when the reciprocating shaft rotates, the telescopic body moves and expands in the longitudinal direction within the hollow portion of the fixed body in a rotation-stop state. the reinforcing portion is formed in a region where the fixed body and the expandable body disposed inside thereof face each other, the reinforcing portion being composed of a groove portion formed on one side thereof and a ridge portion formed on the other side thereof, The rod-shaped telescopic device according to claim 1 or 2, characterized in that the groove portion has a slope extending from its groove bottom that is arc-shaped in cross section, and the peak portion has a slope extending from its peak that is arc-shaped in cross section, the groove portion and the peak portion are in contact with each other opposite to each other to form a rotation prevention portion that restricts rotation of the telescopic body around its axis, and the rotation prevention portion is formed by at least one pair of the groove portion and the peak portion.

11. The telescopic body includes a nut disposed concentrically with an axis of the cylindrical body, The nut has a ridge or groove portion that constitutes a rotation prevention portion formed on the cylindrical body side surface, and is screwed onto the long shaft portion on the side opposite to the extension direction.

12. The present invention comprises a fixed body, an expandable body connected to a cylindrical inner surface portion of the cylindrical body from a cylindrical outer surface portion so as to be freely movable in a longitudinal direction, and a reciprocating shaft disposed on an axis of the fixed body, In a rod-shaped telescopic device of a live line distribution tool, the telescopic body moves in a longitudinal direction within a hollow portion of the fixed body when the reciprocating shaft rotates, The fixed body includes a fixed main body and a cylindrical body, The stretchable body includes a strength portion and a long axis portion, 3. The rod-shaped extendable tool for a live line distribution tool according to claim 2, wherein the reciprocating shaft is movably attached to a fixed body via a bearing.

13. The reciprocating shaft is connected to a gear box, and a gear attached to the reciprocating shaft connected to the gear box is meshed with a gear rotated by a rotating tool in the gear box, The rod-shaped extension tool of the live line distribution tool described in claim 12, characterized in that a bearing of a rotating shaft of a gear rotated by the rotating tool is attached to the gear box, and an outer surface of the bearing of the rotating shaft of the gear is fitted and connected to a mounting surface of the gear box.

14. The fixed body has a gear box provided in a region where the connecting portion and the engagement cylindrical portion surround a gear chamber, a reciprocating shaft extending into the gear box is attached to the connecting portion by a bearing, and a second bevel gear is attached to the tip of the reciprocating shaft; an input member is attached to the engaging cylindrical portion by a bearing, and a first bevel gear is attached to the tip of the input member; the second bevel gear and the first bevel gear mesh with each other; The rod-shaped extension tool of the live line distribution tool described in claim 12, characterized in that a bearing of a rotating shaft of a gear rotated by the rotating tool is attached to the gear box, and an outer surface of the bearing of the rotating shaft of the gear is fitted and connected to a mounting surface of the gear box.