JP5908537B2 - Indirect hot-wire work tool and work method using the same - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an indirect hot wire work tool used when performing an indirect hot wire work and a work method using the same.

  Conventionally, when working on a high-voltage wire (hot wire) in a charged state, indirect hot-wire work is performed in which work is performed indirectly from outside the proximity range of the live wire without directly touching the energized portion of the electric wire. . In this indirect hot line work, there is a long common operation rod (insulation operation rod) made of an insulating material capable of positioning the tip at the work position of the overhead wire (live wire), and at the tip. An indirect hot wire working instrument having a tip tool suitable for various kinds of work that can be detachably connected (coupled) has been used.

  As such an indirect hot wire working instrument, an indirect grounding grounding instrument for grounding an electric wire (for example, refer to Patent Document 1), or by inserting a needle-like needle electrode into an electric wire while covering the electric wire electrically. A needle electrode clamp to be connected (for example, see Patent Document 2) is known. In addition, the tip of a sickle, saw, hammer, ratchet wrench, etc. that cuts off obstructive tree branches, etc. located near the live line is used as the tip tool, and the length of the insulation operation rod is appropriately adjusted to the length corresponding to the work There was also a changeable tool for indirect hot wire work (for example, see Patent Document 3).

JP 2002-152935 A JP 2000-209726 A JP 2008-077942 A

  However, many of the tip tools attached to the common operation rod and the connection portions to which the tip tools are attached are made of metal and often do not have an insulating structure. Therefore, in recent years, in indirect hot wire work, inadvertent contact of the tip tool with a live wire or the like may cause problems such as a ground fault or a short circuit.

  Therefore, the present invention has been made in view of the above-described problems, and by suppressing the exposed portion of the tip tool in the indirect hot-line work tool to the minimum necessary, it is possible to The main purpose is to provide an indirect hot wire working instrument capable of preventing inadvertent contact and a working method using the same.

In order to solve the above problems, the indirect hot wire working instrument of the present invention,
A common operating rod that is held by an operator during indirect hot-line work and is operated so that the tip is positioned at a work target site in a remote live line, and detachably connected to the tip of the common operating rod A tool for indirect hot-line work having a possible tip tool,
A fixing portion fixed to the common operation rod;
A holding portion engaged with the fixing portion and fixed to the common operation rod;
An insulating cylindrical member, and an insulating part disposed so as to cover the holding part,
The insulating portion is held by the holding portion with respect to the common operation rod, and is arranged to be movable in the longitudinal direction according to a force acting in the axial direction of the common operation rod, and is attached and detached. The position is appropriately moved according to the tip tool to cover at least the connection portion with the tip tool at the tip portion of the common operation rod.

At this time, the holding portion is provided with convex portions facing outward on the outer peripheral surface in multiple stages over the longitudinal direction of the common operation rod,
The insulating portion is provided with a plurality of concave portions corresponding to the convex portions over the longitudinal direction of the inner peripheral surface,
The insulating portion is engaged with the convex portion of the holding portion to hold the arrangement with respect to the common operation rod and moves in the longitudinal direction according to the force acting in the axial direction of the common operation rod. It is preferable to do.

Moreover, the fixed portion has a wedge shape, and has a spiral groove along the outer periphery in a state of being attached to the common operation rod,
The holding portion has a spiral protrusion corresponding to the groove on the inner periphery facing the outer periphery of the fixed portion;
It is preferable that the holding portion is screwed to the fixing portion and fixed to the common operation rod.

The holding portion is provided with a male screw on the outer peripheral surface instead of the convex portion,
The insulating portion is provided with a female screw corresponding to the male screw on the inner peripheral surface instead of the concave portion,
The insulating portion may be screwed into the holding portion and moved in the longitudinal direction of the common operation rod by rotating.

  Furthermore, the holding part may be directly fixed to the common operation rod by a joining member without passing through the fixing part. In this case, at least the end of the joint member on the side of the common operation rod is kept in a fixed state (the coefficient of friction with respect to the common operation rod is high), and the common operation rod is protected from being damaged by the joint member. A protective part (such as a protective film) made of resin (such as rubber) is made of a resin that can be made (for example, rubber) or at the portion where the holding part is disposed in the common operation rod It is desirable that it is covered.

  Furthermore, it is preferable that the insulating portion is attached in advance to the common operation rod, and is moved in the longitudinal direction when the tip tool is attached or detached to expose the tip portion of the common operation rod.

Moreover, the method for indirect hot wire work of the present invention is as follows.
An indirect hot wire working method using the indirect hot wire working tool according to any one of claims 1 to 6,
An insulating part moving step of moving a force in the axial direction of the common operation rod with respect to the insulating part disposed on the common operation rod via the fixed part and the holding part, and moving in the longitudinal direction;
A tip tool attaching / detaching step of attaching / detaching the tip tool when the tip of the common operation rod is exposed in the insulating portion moving step;
When the tip tool is connected to the tip portion of the common operation rod in the tip tool attaching / detaching step, after the tip tool is attached, the insulating portion is moved again in the longitudinal direction by the insulating portion moving step, and at least the It covers the connecting portion with the tip tool at the tip of the common operation rod.

  ADVANTAGE OF THE INVENTION According to this invention, careless contact with the live line by a front-end tool at the time of indirect live-line work can be prevented by suppressing the exposed part of the front-end tool in the tool for indirect live-line work to the minimum necessary.

It is a fragmentary sectional view showing roughly the composition of the instrument for indirect hot wire work concerning one embodiment of the present invention. It is explanatory drawing which shows the assembly | attachment process of the tool for indirect hot wire work of FIG. 1, (a) is a mode that attaches a fixed ring receiver to a common operation rod, (b) engages a fixed ring with the fixed ring receiver attached. (C) is a state in which the fixing ring is fixed, (d) is a state in which the insulating cylinder is assembled to the fixed fixing ring that is fixed, (e) is a position of the assembled insulating cylinder and the tip tool is shifted. (F) shows a state where the tip tool is covered by shifting the position of the assembled insulating cylinder. It is a fragmentary sectional view which shows the specific example of a fixing ring receptacle and a fixing ring. It is a perspective view which shows partially the structure of the instrument for indirect hot wire work which concerns on other embodiment in a cross section.

  Hereinafter, an indirect hot wire working instrument according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1 and FIG. 2, the indirect hot wire working instrument 1 according to the present embodiment includes a common operation rod 2 and a tip tool 3 that can be detachably connected to the distal end portion of the common operation rod 2. Have. The common operation rod 2 is a rod-shaped member made of an insulating material, and is gripped by an operator during indirect hot-line work, and a tip part (that is, a tip tool attached to the tip part) at a work target site in a remote live line 3) is an operating means for operating so as to be positioned.

  Various kinds of tip tools 3 are prepared according to the work contents, and can be easily attached to and detached from the common operation rod 2 via the connection portion 4. Specifically, the fixing protrusion 41 of the connection portion 4 provided at the distal end portion of the common operation rod 2 is engaged with the notch 32 provided at the proximal end portion 31 of the distal end tool 3 so as to be attached and detached. It is supposed to be. In the present embodiment, the tip tool 3 has a pointed tip shape, and constitutes a detector used at the time of voltage detection.

  In addition, the indirect hot wire working instrument 1 is provided with an insulating cylinder 5 as an insulating portion made of an insulating cylindrical member. The insulating cylinder 5 includes a fixed ring receiver 61 as a fixing portion fixed to the common operation rod 2, and is fixed to the common operation rod 2 by engaging with the fixed ring receiver 61, and protrudes outward on the outer peripheral surface. The portion 62a is attached to the common operation rod 2 via a fixing ring 62 as a holding portion provided in multiple stages along the longitudinal direction L of the common operation rod 2. Here, an example in which the insulating cylinder 5 is cylindrical is illustrated, but the present invention is not limited to this. However, when the common operation rod 2 has a cylindrical shape, the insulating tube 5 is formed in a cylindrical shape accordingly, so that the insulating portion (the insulation tube 5) is separated from the indirect hot-wire work instrument 1 (the common operation rod 2). ) Can be disposed without waste, and a decrease in workability and operability in the indirect hot wire working instrument 1 can be avoided.

  Specifically, the fixed ring receiver 61 has, for example, a band shape in which four wedges are arranged side by side, and is wound around the common operation rod 2. In addition, as shown in FIG. 3, it is preferable that the fixing ring receiver 61 has a helical male screw 61a along the outer periphery in a state of being attached to the common operation rod 2. On the other hand, the fixing ring 62 preferably has a spiral female screw 62 b corresponding to the male screw 61 a of the fixing ring receiver 61 on the inner periphery facing the outer periphery of the fixing ring receiver 61. Thereby, the fixing ring 62 is screwed into the fixing ring receiver 61, whereby the fixing of the fixing ring receiver 61 to the common operation rod 2 is tightened, and an effect of being firmly fixed to the common operation rod 2 can be achieved. .

  The insulating cylinder 5 is provided with recesses 5 a corresponding to the protrusions 62 a of the fixing ring 62 in multiple stages over the longitudinal direction L of the inner peripheral surface, and is disposed so as to cover the fixing ring 62. . The insulating cylinder 5 is held in a position relative to the common operation rod 2 by engaging the concave portion 5 a with the convex portion 62 a of the fixing ring 62 with respect to the common operation rod 2.

  At this time, the insulating cylinder 5 is connected to a connecting portion 4 (more preferably, a portion not used in the operation of the tip tool 3 including the connecting portion 4) that is a connecting portion with the tip tool 3 at the tip portion of the common operation rod 2. ). Thereby, the exposed part of the front-end tool in the indirect hot wire working instrument 1 can be suppressed to the minimum necessary. Therefore, at the time of indirect hot wire work, the indirect hot wire work tool 1 can prevent inadvertent contact with the live wire by the tip tool 3. Therefore, it is also possible to prevent the occurrence of problems such as ground faults and short circuits due to such contact.

  At the same time, the insulating cylinder 5 moves in the longitudinal direction L by the concave portion 5a of the insulating cylinder 5 getting over the convex portion 62a of the fixing ring 62 according to the force acting in the axial direction (longitudinal direction L) of the common operation rod 2. It is mounted movably. That is, the insulating cylinder 5 is slid and moved in the axial direction (longitudinal direction L) when an operator applies a force in the axial direction of the common operation rod 2 (insulating portion moving step). In the case of this embodiment, such an insulating cylinder 5 is attached to the common operation rod 2 in advance, and is moved in the longitudinal direction L when the tip tool 3 is attached or detached, so that the tip of the common operation rod 2 can be easily moved. It can be exposed. That is, it is preferable that the insulating cylinder 5 is not attached to the common operation rod 2 every time work is performed, but is attached in advance to the common operation rod 2 as the indirect hot-line work instrument 1.

  Thereby, even if the tool 1 for indirect hot wire work is the state which attached the insulating cylinder 5, the position can be moved easily and the attachment / detachment of the tip tool 3 is possible by simple operation. For this reason, it is not necessary to detach the insulating cylinder 5 when attaching / detaching (replacement) the tip tool 3, and the insulating cylinder 5 can be attached / detached only by moving the position according to the tip tool 3 to be attached / detached. It can be performed and has excellent workability. Thus, since the position of the insulating cylinder 5 can be arbitrarily set (changed) according to the type of the tip tool 3, it can be widely applied to various tools.

  Further, when the distal end portion of the common operation rod 2 is exposed by sliding the insulating cylinder 5 in the longitudinal direction L (insulating portion moving step) as described above, the tip tool 3 can be attached and detached (tip tool attaching / detaching step). And When the tip tool 3 is connected to the tip portion of the common operation rod 2 in the tip tool attaching / detaching step, after the tip tool 3 is mounted, the insulating cylinder 5 is moved again in the longitudinal direction L by the insulating portion moving step, and at least shared. The connection portion with the tip tool 3 at the tip portion of the operation rod 2 is covered.

  In the present embodiment, the case where the circular fixing ring 62 is applied as the holding portion will be described. However, the holding portion is not limited to this example, and the holding portion includes, for example, a notch (not shown) in the fixing ring 62. And a cross-shaped shape in plan view may be applied. In this case, since it becomes easy to grasp by the notch, it is possible to provide an advantage that the attaching operation to the common operation rod 2 becomes much easier. In addition, since the cutout portion is formed, the weight of the holding portion (fixing ring 62) is reduced, and the weight can be reduced.

As described above, according to the indirect hot wire working instrument 1 of the present embodiment, the fixed ring receiver 61 fixed to the common operation rod 2 and the common operation rod 2 engaged with the fixed ring receiver 61. The projecting part 62a is fixed to the outer peripheral surface and is formed of a fixing ring 62 provided in multiple stages over the longitudinal direction L of the common operation rod 2 and an insulating cylindrical member, and the projecting part 62a Are provided in multiple stages in the longitudinal direction L of the inner peripheral surface, and the insulating cylinder 5 is disposed so as to cover the fixing ring 62. The insulating cylinder 5 is held in position by engaging the concave portion 5a with the convex portion 62a of the fixing ring 62 with respect to the common operation rod 2, and according to the force acting in the axial direction of the common operation rod 2. It is attached to be movable in the longitudinal direction L. And the position of the insulating cylinder 5 is appropriately moved in accordance with the tip tool 3 to be attached and detached, and at least the connection portion 4 with the tip tool 3 at the tip portion of the common operation rod 2 is covered. The exposed portion of the tip tool 3 can be suppressed to the minimum necessary, and inadvertent contact with the live line by the tip tool 3 can be reliably avoided during indirect hot line work. For this reason, the effect which can prevent generation | occurrence | production of malfunctions, such as a ground fault and a short circuit resulting from inadvertent contact with the live wire by the tip tool 3, can also be show | played.
Further, since the insulating cylinder 5 is attached by engaging the concave portion 5a with the convex portion 62a of the fixing ring 62, the insulating cylinder 5 can be easily slid by applying a force in the longitudinal direction L. The position can be adjusted in multiple stages, and the range that can ensure insulation can be changed with simple operations. In other words, compared to the screwed structure using a screw, when the slide structure that gets over the convex portion 62a in the concave portion 5a is adopted, the insulating cylinder 5 can be moved more quickly and easily than rotating. Excellent operability.

  At this time, the fixing ring receiver 61 has a wedge shape and has a spiral groove along the outer periphery in a state of being attached to the common operation rod 2, and the fixing ring 62 has an inner periphery facing the outer periphery of the fixing ring receiver 61. The fixing ring 62 is preferably fixed to the common operation rod 2 by being screwed to the fixing ring receiver 61. Thereby, the fixing ring 62 can be easily and reliably fixed to the common operation rod 2.

  The insulating cylinder 5 is attached in advance to the common operation rod 2 and is moved in the longitudinal direction L when the tip tool 3 is attached or detached, so that the tip portion of the common operation rod 2 can be exposed. Thereby, since the tip tool 3 can be attached / detached (replaced) with the insulating cylinder 5 mounted (attached state), workability is improved.

  Note that the present invention can be appropriately changed without departing from the gist or concept of the invention that can be read from the claims and the entire specification, and an indirect hot-line work instrument with such a change is also included in the present invention. It is included in the technical idea.

  For example, in the above-described embodiment, the tip tool 3 has a pointed tip shape, and the case where the detector used at the time of voltage detection is applied has been described, but the present invention is not limited to this, In addition, it is also possible to apply a tip tool 10 made of an electric wire covering stripping tool for stripping the electric wire covering as shown in FIG.

  In this case, the tip tool 10 has a support shaft 11, a first function portion 13 having a hook shape 12, and a second function portion 15 having a rod shape 14, and the insulating cylinder 5 below the support shaft 11. Covered. The support shaft 11, the first functional portion 13, and the second functional portion 15 are all made of a material mainly composed of aluminum, and contribute to the weight reduction of the tip tool that can be handled more easily. The support shaft 11 is attached to the insulating support member 16, and is further attached to the insulating common operation rod 2 via the insulating support member 16. The common operation rod 2 has a configuration in which a part of the insulating support member 16 is sandwiched by the fixing protrusion 41 of the connecting portion 4 (more specifically, the connecting portion 4 formed as a fixing ring screw), for example. This is the same as the embodiment described above.

  The hook shape 12 in the first functional unit 13 extends obliquely from the support shaft 11 so as to be gradually separated from the extension line A1 of the support shaft 11, and extends through the via point 17 away from the extension line A1. It approaches in the direction on A1, passes through the apex 18 in the vicinity of the extension line A1, and then extends to the terminal side region 19 in the vicinity of the symmetric position across the extension line A1 from the transit point 17. It is preferable that the apex 19 near the extension line A1 has a bending angle of approximately 90 °.

  The rod shape 14 in the second functional portion 15 is substantially the same as the extension plane of the hook shape 12 with the base portion being a location away from the extension line A1 of the support shaft 11 in the portion forming the hook shape 12, here. It has a configuration that stands vertically. Assuming that the extension line A1 of the support shaft 11 is the vertical direction, the rod shape 14 can be arranged in an angle direction away from the vertical direction by a predetermined angle. The rod shape 14 is fixed by welding the base end portion thereof to the via 17 of the hook shape 12. Although not shown in the drawings, the bar shape 14 may be configured to be fixed by a fixing tool such as a nut or a bolt from the opposite side to the extending direction of the bar shape 14 through a through hole provided in the via point 17. Regarding the cross-sectional area of the bar shape 14, the portion of the tip region 14a in the standing direction is large, and at least the cross-sectional area of the region portion 14b immediately below the tip region 14a is smaller than the portion of the tip region 14a.

  Further, in the above-described embodiment, the case where the convex portion 62a is provided on the outer peripheral surface of the fixing ring 62 and the concave portion 5a is provided on the inner peripheral surface of the insulating cylinder 5 is described as an example. The fixing ring 62 is provided with a male screw (not shown) on the outer peripheral surface instead of the convex portion 62a, and the insulating cylinder 5 is a female screw (not shown) corresponding to the male screw on the inner peripheral surface instead of the concave portion 5a. ), And the insulating cylinder may be moved in the longitudinal direction L of the common operation rod 2 by being screwed into the fixing ring 62 and rotated.

Furthermore, in the above-described embodiment, the case where the fixing ring 62 is fixed by engaging with the fixing ring receiver 61 attached to the common operation rod 2 is described, but the present invention is not limited to this, and the fixing ring 62 is Further, it may be directly fixed to the common operation rod 2 by a joining member such as a screw without passing through the fixing ring receiver 61. Thereby, the number of parts can be omitted and the mounting structure of the fixing ring 62 can be simplified.
In this case, at least the end of the joint member (screw or the like) on the side of the common operation rod 2 maintains a fixed state (the friction coefficient with respect to the common operation rod 2 is high), and the common operation rod 2 is damaged by the joint member. It is made of resin (for example, rubber) that can be protected from being formed, or a resin (rubber or the like) protection portion (protection) is provided at a portion where the fixing ring 62 is disposed in the common operation rod 2. It is desirable that the film is covered. Thereby, the fixing ring 62 can be fixed without damaging the common operation rod 2.

  In the above-described embodiment, the fixed ring receiver 61 is attached to the common operation rod 2 so as to be inclined downward toward the connecting portion 4 side with the tip tool 3 provided on one end side of the common operation rod 2. Although the present invention is not limited to this, the fixing ring receiver 61 is inclined upward toward the connecting portion 4 side of the common operation rod 2 (in other words, the other end side of the common operation rod 2). It may be attached so as to be inclined downward). That is, the fixing ring 62 may be inserted from the connecting portion 4 side of the common operation rod 2 and screwed to the fixing ring receiver 61, or conversely, the fixing ring 62 may be inserted from the other end side of the common operation rod 2 and fixed. It may be attached by screwing with the receiver 61.

DESCRIPTION OF SYMBOLS 1 Indirect hot wire work tool 2 Common operation stick 3 Tip tool 4 Connection part 41 Protrusion part 5 Insulation cylinder (insulation part)
5a Recess 61 Fixing ring receiver (fixing part)
61a Groove 62 Fixing ring (holding part)
62a Protruding portion 62b Protruding portion 10 Tip tool 11 Support shaft 12 Hook shape 13 First functional portion 14 Bar shape 14a Tip region 14b Region portion 15 Second function portion 16 Insulating support member 17 Via 18 18 Vertex 19 End side region A1 Extension line L Longitudinal direction (axial direction)

Claims (7)

A common operating rod that is held by an operator during indirect hot-line work and is operated so that the tip is positioned at a work target site in a remote live line, and detachably connected to the tip of the common operating rod A tool for indirect hot-line work having a possible tip tool,
A fixing portion fixed to the common operation rod;
A holding portion engaged with the fixing portion and fixed to the common operation rod;
An insulating cylindrical member, and an insulating part disposed so as to cover the holding part,
The insulating portion is held by the holding portion with respect to the common operation rod, and is arranged to be movable in the longitudinal direction according to a force acting in the axial direction of the common operation rod, and is attached and detached. An indirect hot-wire working instrument, wherein the position is appropriately moved according to the tip tool to cover at least a connection portion with the tip tool at the tip portion of the common operation rod. In the holding portion, convex portions facing outward are provided on the outer peripheral surface in multiple stages over the longitudinal direction of the common operation rod,
The insulating portion is provided with a plurality of concave portions corresponding to the convex portions over the longitudinal direction of the inner peripheral surface,
The insulating portion is engaged with the convex portion of the holding portion to hold the arrangement with respect to the common operation rod and moves in the longitudinal direction according to the force acting in the axial direction of the common operation rod. The apparatus for indirect hot wire work according to claim 1, wherein: The fixing portion has a wedge shape, and has a spiral groove along the outer periphery in a state of being attached to the common operation rod,
The holding portion has a spiral protrusion corresponding to the groove on the inner periphery facing the outer periphery of the fixed portion;
The indirect hot wire working instrument according to claim 1, wherein the holding portion is screwed to the fixing portion and fixed to the common operation rod. The holding part is provided with a male screw on the outer peripheral surface instead of the convex part,
The insulating portion is provided with a female screw corresponding to the male screw on the inner peripheral surface instead of the concave portion,
4. The indirect hot wire working instrument according to claim 2, wherein the insulating portion is screwed into the holding portion and is movable in a longitudinal direction of the common operation rod by being rotated. 5. .   The indirect hot-wire work device according to any one of claims 1 to 4, wherein the holding portion is directly fixed to the common operation rod by a joining member without passing through the fixing portion. .   The said insulating part is previously attached to the said common operation rod, It is moved to the said longitudinal direction at the time of attachment or detachment of the said front tool, and the front-end | tip part of the said common operation rod is exposed. The indirect hot wire working instrument according to any one of the above. An indirect hot wire working method using the indirect hot wire working tool according to any one of claims 1 to 6,
An insulating part moving step of moving a force in the axial direction of the common operation rod with respect to the insulating part disposed on the common operation rod via the fixed part and the holding part, and moving in the longitudinal direction;
A tip tool attaching / detaching step of attaching / detaching the tip tool when the tip of the common operation rod is exposed in the insulating portion moving step;
When the tip tool is connected to the tip portion of the common operation rod in the tip tool attaching / detaching step, after the tip tool is attached, the insulating portion is moved again in the longitudinal direction by the insulating portion moving step, and at least the A method for indirect hot-line work, characterized in that a connection portion with the tip tool at a tip portion of a common operation rod is covered.

Images