JP2011163854A - Voltage impression terminal for locating fault point - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a voltage impression terminal for locating a fault point allowing fault point locating work to be efficiently performed without requiring much time by performing a search for a ground fault spot in an electric wire being an accident-spot searching object without the need to change various tip tools for an insulated operation rod. <P>SOLUTION: This voltage impression terminal for locating a fault point includes a joint 21 removably connected to an end of the insulated operation rod 100 that reaches a height with the electric wire laid thereat, a suspended part 12 brought to a suspended state by being hung on the electric wire, and a needle electrode conductively connected to the electric wire by being brought to a suspended state from an electric wire which is an accident-spot searching object. A magnet 18a acting as an S pole is disposed on the front side of a side face of a body enclosure while a magnet 18b acting as an N pole is disposed on the rear side thereof, allowing them to support each other by being magnetically attracted and engaged. A voltage impression terminal 10 for locating a fault point coupled to an end of the operation rod 100 is thereby caused to support another voltage impression terminal for locating a fault point. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to an accident point search power-supplying terminal, and more particularly to a device that enables a ground fault point in a distribution line to be searched without trouble.

  Conventionally, when a ground fault occurs in any part of a distribution line that supplies power from a commercial power source, an accident point search device has been used to identify the point where the accident occurred (for example, In Patent Document 1), the fault point search device applies a search voltage to a distribution line by electrically connecting a charging terminal between terminals for interposing a box-type or cylindrical cut-out fuse. It has become.

  This accident point search terminal is connected to the cut-out of each distribution line of the three-phase three-wire from the commercial power supply, so that the temporary support cleat is temporarily held in the temporary support cleat. It is convenient to temporarily install it on a brace in the vicinity of the cutout, and then distribute and connect to each cutout (for example, Patent Document 2).

JP 2008-180634 A JP 2006-318720 A

  However, in such an accident point investigation charging terminal, it must be properly used depending on whether the cutout is a box type or a cylindrical type, and before connecting to the cutout, Then, it was necessary to release the cutout with the tip tool of the insulation operation rod after detecting the electric power of each distribution line, and after that, the work of connecting the power terminal to the cutout was performed. This alone requires replacement work of the tip tool of the insulating operating rod, and further, the insulating operating rod needs to be used when the temporary support cleat is installed on the arm metal. In short, in accident point search, the same work had to be repeated repeatedly, and the workability was poor, and it took time to recover quickly.

  Also, when temporary support cleats are used, the power terminals for each of the three phases are temporarily held, which can cause considerable weight and may become unstable. Therefore, there is room for improvement so that anyone can work.

  Therefore, the present invention enables the search for the ground fault location in the electric wire subject to the fault point search without changing the various tip tools of the insulation operation rod, and efficiently performs the fault point search work without trouble. The purpose is to provide a power terminal for accident point search.

  The invention of the power point terminal for accident point exploration that solves the above-mentioned problem is a state in which the connecting portion that is detachably connected to the tip of the insulating operation rod that reaches the high place where the electric wire is wired, and the state where the electric wire is hooked and suspended And a connecting portion that is suspended from the electric wire to be detected at the accident point and connected to the electric wire and is connected to the electric wire, and is configured by the first and second support portions to engage with each other. By providing at least one of the first support part or the second support part, one of which supports the other, and supporting a separate accident point search power terminal before hanging on the wire, or It is supported by a separate power point terminal for searching for an accident point in a state of being hung on the electric wire.

  In this invention, it is possible to support the first support part of the accident point search powering terminal connected to the tip of the insulating operation rod by engaging the second support part of the separate fault point search powering terminal. Then, the fault point search terminal at the tip of the insulation operation rod is hung on the electric wire subject to the accident point search, suspended, connected to the electric wire, and then connected to a separate fault point search unit. The electrical terminal can be connected in a conductive state in a state where it is hung by hanging on another electric wire to be searched for an accident point. Therefore, without changing the cut-out and without using the temporary support cleats, it is necessary to replace the accident point search power connection terminal connected to the tip of the insulation operating rod, and sequentially The charging terminal can be suspended from the electric wire and connected in conduction.

  As described above, according to the present invention, the accident point search powering terminal connected to the tip of the insulating operation rod is engaged with and supported by the accident point search powering terminal itself, and the accident point search target electric wires are successively applied. Conductive connection can be established, and the accident point search operation can be started without performing the opening / closing operation of the cutout or the installation operation of the temporary support cleat. Therefore, the accident point search operation can be efficiently performed and quickly recovered without preparing various tools to be attached to the tip of the insulating operation rod and without performing the replacement operation.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the whole structure of 1st Embodiment of the power point terminal for accident point search which concerns on this invention, (a) is a partial cross section perspective view which shows the conceptual diagram of the internal structure, (b) is the support structure FIG. 3C is a front perspective view of the internal configuration for explaining the support structure, and FIG. It is a top view which shows the insulation operating rod which connects the power point terminal for accident point search when approaching to an electric wire. It is a figure which shows the state at the time of use, (a) is a front perspective view which shows the support structure at the time of approach to the electric wire, (b) is a side view which shows the support posture at the time of approach to the electric wire. It is a figure which shows 2nd Embodiment of the charging point terminal for accident point search which concerns on this invention, and is a partially expanded sectional view which shows the principal part structure.

  As an embodiment of the present invention, as in the above problem solving means, a connecting portion that is detachably connected to the tip of an insulating operation rod that reaches a high place where the electric wire is wired, and is hung by hanging on the electric wire. A suspended portion to be in a state and a connection portion that is suspended from the electric wire to be detected at the accident point and is electrically connected to the electric wire, and is configured by first and second support portions to engage with each other. By providing at least one of the first support part or the second support part, one of which supports the other, and supporting a separate power point terminal for searching for an accident point before being suspended from the electric wire, or In addition to being supported by a separate power point terminal for searching for an accident point in a state of being hung on the electric wire, the following configuration may be provided.

  As a 1st form, you may make it the said 1st support part and the said 2nd support part mutually engage by attracting | sucking with a magnetic force, and the other may support.

  In this configuration, the charging points for accident point search can be attracted to each other by the magnetic force of the first and second support parts, and can be engaged and supported with each other. It is possible to establish a conductive connection.

  As a second form, the first support part and the second support part are configured by a combination of a hook part and a hooked part, and the hooked part side supports the hooking part side by engaging with each other. You may do it.

  In this configuration, the charging terminals for accident point search can be supported by engaging the hooked portion and the hooked portion of the first and second support portions, and sequentially hooked on the electric wire to be searched for the accident point. It is possible to establish a conductive connection in a suspended state.

  As a third form, the first support part and the second support part are arranged on the side surface of the main body housing, and the suspension part of the separate fault point search power-supplying terminal before suspension is provided. You may make it support so that it may become a position shifted | deviated from the said electric wire.

  In this configuration, the side surfaces of the main body housing of the accident point search powering terminal can be brought close to each other and the first and second support portions can be engaged to support each other with a compact structure. It is possible to establish a conductive connection in a state of being hung by hanging on an electric wire to be searched.

  As a 4th form, you may make it provide the electric power detection function which confirms the presence or absence of the electric current which flows into the said electric wire, and the alerting | reporting function which alert | reports the electric power detection result by this electric power detection function.

  In this configuration, by setting the accident point exploration charging terminal on the electric wire subject to the accident point exploration, it is possible to detect the presence or absence of current flowing through the electric wire and notify the detection result. The worker can proceed with work according to the detection result.

  As a fifth form, the connecting portion supports an electrode that protrudes from the upper side of the electric wire and penetrates the coating and is in conductive contact with the conductive core, and a lower side of the electric wire on the opposite side of the electrode. There may be provided a tightening portion that rises and presses the electric wire against the electrode, and a torque limiter portion that adjusts the pressing force of the electric wire against the electrode by the tightening portion.

  In this configuration, the wire is pressed and connected to the electrode to be in conductive contact with the conductive core wire in a state of being hung and hung by the suspension point of the accident point search powering terminal by the tightening portion. The pressing force can be adjusted by a torque limiter so that the electrode is not excessively pressed against the conductive core wire.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3 are views showing a first embodiment of a power point terminal for accident point search according to the present invention.

  In FIG. 1, an accident point search voltage-applying terminal 10 is designed to be attached to the tip of an insulation operating rod (working rod) 100 shown in FIG. It is attached to each three-phase distribution line from the power source to apply the exploration voltage.

  Here, the insulating operation rod 100 is formed into a long rod-shaped portion 101 that is gripped by an operator, and an attaching / detaching portion 102 that is disposed on the distal end side of the rod-shaped portion 101 and attaches / detaches various functional tools (tip tools). , And can be shared for various types of work, and the operator grips the rod-like portion 101 and attaches a functional tool such as a hook attached to the detachable portion 102 to the work object at the separated position, for example, It is possible to realize a so-called indirect hot wire method in which a desired work / operation is performed on an electric wire in a high place.

  For example, the operation rod 100 employs a rod-shaped portion 101 formed by molding an insulating material such as plastic into a hollow cylindrical shape to ensure insulation, and umbrella covers 103 and 104 are provided at intermediate portions between both ends. When attached, the distal end umbrella cover 103 drips moisture from the detachable portion 102 side, and the proximal end umbrella cover 104 can safely operate in consideration of insulation from the distal end side. To ensure safety when working. In addition, the part which the operator of the rod-shaped part 101 hold | grips is provided with the slipper which can replace the material which is hard to slip.

  The attaching / detaching portion 102 of the operation rod 100 includes a main body shaft portion 105 that protrudes in the same direction as the rod-shaped portion 101 and a pair of protrusions on the opposite sides of the peripheral surface of the main body shaft portion 105. Pins 106, protrusions 107 urged by a built-in spring (not shown) so as to protrude from the front end surface of the main body shaft portion 105, and screws engraved on the peripheral surface of the main body shaft portion 105 on the rod-like portion 101 side. A grip 108 that is screwed into the shape 101a and moves up and down is disposed.

  On the other hand, the accident point search power-supplying terminal 10 includes a joint portion 21 designed to be engaged and locked with the detachable portion 102 of the operation rod 100 so as not to be relatively rotatable and to be detached. The joint portion 21 includes a main body cylinder portion 22 formed in a bottomed cylindrical shape having a base end side rear end surface opened so that the main body shaft portion 105 of the detachable portion 102 is inserted and can be accommodated, and the main body cylinder. It is comprised by a pair of T-shaped notch part 23 which is located in the other side of the surrounding surface part of the part 22, and is notched in the general T shape. Here, in detail, the T-shaped notch portion 23 extends to both sides of the insertion groove portion 23a from the rear end surface side to the front end side of the main body cylindrical portion 22 and the insertion groove portion 23a in the orthogonal direction. The rotating groove 23b is formed in a T-shape with a rotating groove 23b and an engaging groove 23c that returns from both ends of the rotating groove 23b to the rear end surface side of the main body cylinder 22.

  As a result, the joint portion 21 of the accident point search powering terminal 10 inserts the pin 106 of the attaching / detaching portion 102 of the operating rod 100 into the insertion groove portion 23a of the T-shaped notch portion 23 of the main body cylindrical portion 22, After inserting the main body shaft portion 105 of the detachable portion 102 to the back in the main body cylinder portion 22, the main shaft portion 105 can be caused to enter until it hits the end of the rotation groove portion 23 b of the T-shaped notch portion 23 by rotating relative to each other. At this time, the main body shaft portion 105 of the attaching / detaching portion 102 of the operating rod 100 abuts against the bottom surface of the main body cylinder portion 22 of the joint portion 21 and relatively rotates with the projection 107 sinking, and then is inserted into the main body cylinder portion 22. When the force is released, the projection 107 protrudes due to the elastic force of the built-in spring and pushes back the main body cylindrical portion 22, and the detachable portion 102 of the detachable portion 102 is inserted into the engaging groove portion 23 c from the rotating groove portion 23 b of the T-shaped notch portion 23. The pin 106 can enter and be engaged so that it cannot be rotated relative to the pin 106. Further, the operating rod 100 can be locked so that the pin 106 is not detached from the engaging groove 23c and rotated by rotating the grip 108 of the attaching / detaching portion 102 and moving it toward the joint portion 21 side. It is possible to reliably prevent the joint portion 21 of the point exploration charging terminal 10 from being relatively rotated and detached from the attaching / detaching portion 102 of the operation rod 100. That is, the joint portion 21 constitutes a connecting portion that is detachably connected to the tip of the operating rod 100.

  In addition, the accident point search powering terminal 10 includes a hanging portion 12 in which the upper shape of the main body housing 11 is formed in a hand shape of an approximate key so that it can be hooked and hung on the electric wire to be searched for the accident point. On the other hand, below the suspended portion 12, a base end portion 13 is provided which is connected to the upper shape of the main body housing 11 and is formed so as to face the upper side of the suspended portion 12. A joint portion 21 is connected to the lower surface side of 13.

  The hanging portion 12 is formed in a hand shape of a key in which one side is shortened by reversing the U-shape upside down, and the lower surface on the short side of the main body housing 11 is formed on an inclined surface 11a that rises toward the inner side. The electric wire to be hooked is guided inside.

  The hanging portion 12 protrudes so that the needle electrode 14 conducting to the power application cable 14 a for applying the exploration voltage is directed downward from the uppermost portion between the inclined surfaces 11 b of the upper inner surface of the main body housing 11. Further, in the main body casing 11 of the suspended portion 12, a voltage detection function (CT receiver) 15 for detecting the presence or absence of a magnetic field generated by the current flowing in the suspended wire is built in. The battery 15a such as a button battery prepared in the main body housing 11 is used to notify the operator of the detection result by turning on the LED 15b.

  Thereby, in the hanging part 12, when an operator visually grasps whether or not the LED 15b is lit, it is possible to confirm the presence / absence of current in the electric wire subject to the accident point search and to proceed with the work. In addition, although LED15b comprises the function which lights up and alert | reports the electric detection result, for example when the electric current is flowing in the electric wire, you may make it alert | report by not only this but audio | voice output, such as a buzzer. good. Further, the LED 15b is arranged on the slope 11c formed obliquely at the lower part of the main body casing 11, so that the result of the electric detection can be grasped by visual observation at either a high place or a low place.

  The base end portion 13 is formed with an inclined surface 11d facing the short-side inclined surface 11a of the hanging portion 12 in the main body housing 11, and a female screw 13a engraved therein has a male screw in a vertical posture. The member 16 is screwed together, and a joint portion 21 is fixed to the lower end portion of the male screw member 16.

  Thereby, in the base end part 13, the upper surface 16a of the external thread member 16 can be advanced and retracted toward the needle electrode 14 of the hanging part 12, by rotating the operating rod 100 connected to the joint part 21, The probe electrode 14 can be reliably brought into contact with the conducting core wire of the electric wire subject to the accident point search, and the search voltage can be applied with high reliability. That is, the needle electrode 14 constitutes a connection portion, and the male screw member 16 constitutes a tightening portion.

  Here, the base end portion 13 can also connect the joint portion 21 to the attaching / detaching portion 102 at the distal end of the operating rod 100 via the torque limiter 17 illustrated in FIG. 3. The torque limiter 17 Although illustration is omitted in detail, the structure of the attachment / detachment portion 102 and the structure of the joint portion 21 are provided in a series posture so that the operation rod 100 is connected and fixed to the attachment / detachment portion 102 side of the operation rod 100 so as not to be relatively rotatable. In addition, the torque is set so that the pressing force until the needle electrode 14 damages the conductive core wire of the electric wire is not applied to the male screw member 16 as a torque limit.

  And the accident point search charging terminal 10 has magnets 18a on the front and rear sides of both sides of the main body housing 11, with the inclined surfaces 11a and 11d forming the opening for guiding the wires into the suspended portion 12 as the front. 18b is embedded, and the magnets 18a and 18b are arranged so that the magnetic poles facing the outside are different between the front and the rear, and attract and hold the side surfaces of the separate accident point search voltage-applying terminals 10 by magnetic force. It has become. That is, one of the magnets 18a and 18b constitutes one of the first and second support parts, and the other constitutes the other of the first and second support parts.

  As a result, the accident point search charging terminal 10 is attached to the tip of the operation rod 100 as shown in FIG. 3, and the magnet 18b (N pole) on the rear side of the main body housing 11 is attached to the operation rod 100. The magnet 18a (the S pole) on the front side of the separate accident point search powering terminal 10 that is not attached can be attracted and held by magnetic force. For this reason, at the tip of the operating rod 100, the accident point search charging terminal is in a state where it can be hung on the electric wire as it is without blocking between the inclined surface 11a of the suspended portion 12 and the inclined surface 11d of the base end portion 13. 10 can be connected and supported, and the other accident point search terminals 10 can be attracted and supported by magnetic force on both sides shifted to the rear side. Therefore, it is possible to approach the operation point 100 by supporting the accident point exploration terminal 10 for each of the three-phase distribution lines subject to the accident point exploration with one operating rod 100, and for the accident point exploration suspended on the electric wire. The power point terminal 10 for accident point search in a state where the power point terminal 10 is attracted and supported by a magnetic force is suspended from a desired wire by sequentially connecting and supporting the operation rod 100 to the joint portion 21. Can be. After this, conversely, the accident point search powering terminal 10 removed from the electric wire may be recovered after being supported and integrated with a separate accident point search powering terminal 10.

  As described above, in the present embodiment, a compact and inexpensive configuration in which the magnets 18 a and 18 b are incorporated in the main body casing 11, and the accident point search power-supplying terminal 10 itself connected to the tip of the operation rod 100 is separately provided. It is possible to suspend and connect to the electric wires subject to accident point search one after another by attracting and supporting the power point terminal 10 for accident point search by magnetic force, and performing cut-out opening / closing work, temporary support cleat installation work, etc. The accident point search work can be started without any problems. Therefore, the accident point search operation can be efficiently performed and quickly recovered without preparing various tools to be attached to the tip of the operation rod 100 and without performing the replacement operation.

  Here, in the present embodiment, the magnets 18a and 18b are disposed in the main body housing 11 so that the magnetic poles are different, and the gap between the inclined surface 11a of the suspended portion 12 and the inclined surface 11d of the base end portion 13 is blocked. However, the present invention is not limited to this, and the configuration is changed between the accident point search powering terminal 10 at the center and the accident point search powering terminal 10 supported on both sides, and the rear magnet 18b. In this case, the voltage detection function 15 can be connected to one accident point search charging terminal 10 even if one of the front side surfaces is made of a ferromagnetic material such as iron. It is also possible to arrange only for use.

  Next, FIG. 4 is a figure which shows 2nd Embodiment of the power point terminal for accident point search based on this invention. Here, since this embodiment is configured in substantially the same manner as the above-described embodiment, only the characteristic part will be described.

  In FIG. 4, a hook 38 is connected to the main body housing 11 of the accident point search powering terminal 10 instead of the front magnet 18 a, while a hooking hole 39 is provided instead of the rear magnet 18 b. It is open and can be supported by inserting the hook 38 into the hooking hole 39 and hooking it. That is, one of the hook 38 of the hooking portion or the hooking hole 39 of the hooked portion constitutes one of the first and second support portions, and the other constitutes the other of the first and second support portions.

  As a result, the accident point search charging terminal 10 is attached to the tip of the operating rod 100 and attached to the operating rod 100 in the catching hole 39 on the rear side of the main body housing 11 as in the above-described embodiment. By inserting and hooking a hook 38 on the front side of a separate accident point search power-supplying terminal 10 that is not provided, it can be supported in a shifted state. It is possible to apply the search voltage by approaching and hanging the fault point search terminal 10 for each electric wire.

  As described above, in the present embodiment, in addition to the same effects as the above-described embodiment, it can be realized with a simple configuration of the hook 38 and the hooking hole 39, and can be manufactured at a lower cost.

  Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea.

  10 …… Electrical point exploration charging terminal 11 …… Body housing 12 …… Hanging part 13 …… Base end 14 …… Needle electrode 15 …… Electric detection function 15b …… LED 16 …… Male screw member 17… ... Torque limiter 18a, 18b …… Magnet 21 …… Joint part 38 …… Hook 39 …… Hook hole 100 …… Insulation operation rod

Claims (5)

A connecting part that is detachably connected to the tip of an insulation operating rod that reaches the high place where the electric wire is wired, a hanging part that is hung by hanging on the electric wire, and a hanging part that is suspended from the electric wire subject to the accident point search And a connecting portion for conducting and connecting to the electric wire in a state of being connected,
Before being suspended from the electric wire, comprising at least one of the first support part or the second support part, which is constituted by first and second support parts and one of which supports the other by engaging with each other An accident point search powering terminal which is supported by a separate fault point search powering terminal which is supported by a separate fault point search powering terminal which is suspended from the electric wire.   2. The fault point search terminal according to claim 1, wherein the first support portion and the second support portion are engaged with each other by being attracted by a magnetic force and the other is supported by the other.   The said 1st support part and the said 2nd support part are comprised by the combination of a hook part and a hook part, and the said hook part side supports the said hook part side by engaging with each other. 1. A terminal for searching for an accident point according to 1.   The first support part and the second support part are arranged on a side surface of the main body housing, and the suspended lower part of the separate accident point searching power terminal before being suspended is shifted from the electric wire. It supports so that it may become, The charging point terminal for accident point search in any one of Claim 1 to 3 characterized by the above-mentioned.   The accident point according to any one of claims 1 to 4, further comprising: a power detection function for confirming presence / absence of a current flowing through the electric wire; and a notification function for notifying a result of power detection by the power detection function. Exploration power terminal.

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