JP5283163B2 - Electrical grounding device for trolley wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detection and grounding apparatus for a trolley line enabling an operation for connecting a ground line to the trolley line in a trolley line grounding operation to be easily performed by lifting a lifting rope. <P>SOLUTION: A supporting hook 5 hooked to the trolley line T and a support pulley 7 to which the lifting rope 6 is hooked are attached to the upper end of the insulation operation bar 2 of the detection and grounding apparatus 1. A detection alarm 8 for informing of the presence or absence of a voltage in the trolley line T is installed in the insulation operation bar 2. A hook metal fitting 3 suspended from one end of the lifting rope 6 is joined to a grounding metal fitting 4, disposed under the support hook 5, and can be lifted from the other end. The hook metal fitting 3 is installed in such a manner that the lower parts of a fixed rod 10 and a movable rod 11 connected to each other through the lifting rope 6 are opened and closed. The movable rod 11 is pulled to the fixed rod 10 side by a spring 16. A cam member 17 is attached to the bottom end of the movable rod 11 rotatably upward. The cam member 17 is pushed up by the trolley line T accepted to the inside of the movable rod 11 and engaged with the movable member 11, and the interval between the cam member and the fixed rod 10 is determined. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a trolley wire detecting grounding device for connecting a grounding lead wire to a trolley wire in order to ground this section after a power failure has occurred in a construction section of a train line.

In the construction on a train line, after a predetermined section is blacked out during a time when vehicle traffic is interrupted, it is confirmed that no voltage is applied to the electric line, and then the electric wire in that section is grounded. Conventionally, as a method of measuring the voltage of an electric wire, a hook metal fitting is fixed to the tip of an insulation operating rod, and a voltage indicator electrically connected to the hook metal fitting is provided at the lower end portion to measure an overhead wire voltage. An electric appliance has been proposed (see Patent Document 1).
In addition, a grounding device has been proposed in which a hook fitting to which a grounding lead wire that is electrically connected to a rail is connected is detachably provided at the tip of an insulating operation rod as a grounding trolley wire for construction. (See Patent Document 2). The hook metal fitting is pivotally attached to the base part that penetrates the screw hole in the vertical direction and the ground lead wire is connected to the side so that one end part faces the upper opening of the screw hole. The movable piece is hung on the electric wire between the other end portion and the base portion. The locking member for coupling the insulating operation rod to the hook metal fitting is provided with a screw rod that is screwed into the screw hole of the hook metal fitting at the upper end portion, and the lower portion is engaged with the engagement pin at the tip of the insulating operation rod. Provided. An induction piece extending obliquely downward is coupled to the movable piece to guide the electric wire to the inside of the movable piece. When the insulating operation rod is rotated around the axis, the screw rod rotates together, protrudes and retracts from the screw hole, raises and lowers the end of the movable hook piece, and grips and releases the electric wire with the base.
Furthermore, a hook-shaped tip metal fitting, a pulley and a joint provided at the lower part of the tip fitting, an electric rope reel attached to the base end portion, and a grounding wire lifting rope that is hung on the pulley and wound by the electric rope reel A long operating rod with a joint and a joint to which the ground wire connected to the ground wire lifting rope is coupled, and the ground wire lifting rope is wound up with an electric rope reel and the joint is connected to the joint. There is an electrical grounding device (Patent Document 3).
Japanese Utility Model Publication No. 61-3476 JP 2002-262421 A JP 2000-335286 A

Among the above-described conventional devices, the device described in Patent Document 1 only measures the voltage of the overhead wire and does not have a function of grounding the overhead wire. Therefore, when using it for a trolley wire, a separate grounding device is prepared. There must be.
In the thing of patent document 2, in order to attach a hook metal fitting to an electric wire or to attach and detach an insulation operation stick and a locking member to a hook metal fitting, it held up a comparatively long and heavy insulation operation stick. Rotating and aligning with a predetermined part of the hook metal fitting is forced, and in addition, at the place where the trolley wire is intricate, work is done so that the hook metal fitting does not come into contact with other lines when the hook metal fitting is attached or detached. You must proceed carefully.
In the thing of patent document 3, in order to provide a joint part, a reel, a grounding confirmation part, etc. besides a voltage detection part on an operation bar, the operation which raises an operation bar and latches a tip metal fitting to a trolley wire is not easy. . In addition, when the joint is connected to the joint and the trolley wire is grounded, the joint and ground wire are supported by the lifting rope, and the lifting rope remains under tension. If the lock part and the rope reel are inadvertently released, there is a risk that the joint and the ground wire may fall off. Therefore, it is desired to improve workability and safety when the trolley wire is grounded.
Therefore, the present invention has a function of grounding the trolley wire in addition to the function of confirming the presence / absence of the voltage of the trolley wire, a good workability that enables efficient and simple grounding work, and a safety that reliably supports the grounding wire. It is an object of the present invention to provide a voltage detecting grounding device having the characteristics.

In order to solve the above-mentioned problem, in the first invention, a conductive support hook 5 to be hooked on the trolley wire T, a suspension rope 6 for supporting the hook metal fitting 3, and a suspension rope are hung on the insulation operating rod 2. A support pulley 7 is provided. The hook metal fitting 3 is pivotally attached to the upper end of the fixed rod 10 so as to be openable in the front-rear direction, and is pivotally attached to the lower portion so that the trolley wire T is fixed to the fixed rod 10. Between the fixed rod 10 and the lower end of the movable rod 11 and the conductive movable rod 11 that is pulled by the spring 16 toward the fixed rod 10 and is held by the spring 16 so as not to be detached. The engagement position that prevents the movable rod 11 from being attracted to the fixed rod 10 against the spring force, and the trolley line T received between the fixed rod 10 and the movable rod 11 is pushed up and intervened between the two. It is composed of a cam member 17 which is fixed to be detached and fixed so as to be movable between a release position that does not hinder the pulling of the movable rod 11 to the fixed rod 10, and allows the trolley T wire to enter the hook fitting 3. On the other hand, after the trolley wire T is detached from the hook metal fitting 3 To prevent re-entry.
In the second invention, the base end is pivotally attached to either the lower end of the movable rod 11 or the fixed rod 10, and the tip contacts the other to widen the gap between the movable rod 11 and the fixed rod 10. The cam member 17 is configured to be rotatable in the vertical direction between the joint position and a release position pushed up by the trolley line T received between the movable rod 11 and the fixed rod 10 and away from the other.
In the third aspect of the invention, the cam member 22 is provided on either the fixed rod 10 or the movable rod 11 so as to be slidable in the vertical direction, the engagement position for intervening between the fixed rod 10 and the movable rod 11, and the fixed rod. 10 is configured to be movable between a release position which is pushed up by a trolley line T received between the movable rod 11 and the movable rod 11 and away from the other.
In the fourth aspect of the invention, the upper and lower half portions of the fixing rod 10 are coupled via a hinge 26, the lower half portion is supported by the hanging rope 6, and the upper half portion is lowered so as to fall away from the insulating operation rod 2. It is constructed so that it can be bent so as to be pulled by a spring 27 from the half, and a slide cam 22 is slidable up and down on the fixed rod 10, and the hinge 26 of the fixed rod 10 is prevented from bending up and down at the engagement position. The reed of the fixed rod 10 is allowed by exceeding the hinge 26 in the position.

  In the present invention, since the trolley line can be grounded after confirming the presence or absence of the voltage applied to the trolley line in the construction of the train line, the safety of the grounding work prior to the construction on the train line can be ensured. Once a heavy insulated hook with a support hook is hooked on the trolley wire, the hook metal fitting can be attached to the trolley wire only by lifting and lowering with a hanging rope without holding the insulation rod. There is no need to align the hook bracket to the trolley wire, the hook bracket can be attached to the trolley wire very easily and easily, and the hook bracket can be securely hooked without being easily detached from the trolley wire. The hook metal fittings and ground lead wires can be safely held. The hook fitting attached to the trolley wire can be removed only by lifting and lowering the hanging rope. At that time, once the hook fitting is detached from the trolley wire, the hook fitting is not caught again on the trolley wire, so the removing operation is smooth. The operability is good, and contact with other trolley wires can be easily avoided even at locations where multiple trolley wires are intertwined. Removal is not hindered, the work load can be greatly reduced, and the work efficiency of the entire grounding work is improved.

An embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the voltage detection grounding device 1 according to the present invention checks the presence or absence of a voltage by applying an insulating operation rod 2 to a trolley wire T in advance when, for example, construction on an electric wire in a train line facility is performed. After that, the ground metal fitting 4 to which the lead wire 12 is connected is attached to the rail, and the hook metal fitting 3 is attached to the trolley wire T for grounding.

  As shown in FIG. 1 to FIG. 3, the insulating operation rod 2 is constructed by fitting adjacent members of a plurality of constituent members together so that they can be expanded and contracted, and has a metal support hook at the upper end thereof. 5 is fixed. The support hook 5 has a pair of hook plates 5a and 5a facing left and right. A rotatable support pulley 7 that can be supported by hanging a suspension rope 6 for lifting the hook metal fitting 3 is attached to the hook plate 5a. A rope guide 2 a through which one end side of the suspension rope 6 is passed is provided at a joint portion in the middle of the insulating operation rod 2. In the middle of the insulating operation rod 2, a voltage detection alarm device 8 is attached which is electrically connected to the support hook 5 and warns the application of the voltage at the contact position by a buzzer sound and LED lighting. A grounding wire 9 for detection is connected to the electric detection alarm 8, and the end portion thereof can be magnetically attracted to the rail. The other end of the suspension rope 6 is locked to the hook metal fitting 3 so as to be moved up and down from one end side.

  The hook fitting 3 is guided by the support pulley 7 so as to be arranged below the support hook 5 by the suspension rope 6. As shown in FIG. 3, the hook metal fitting 3 includes a fixed rod 10 to which the other end of the suspension rope 6 is locked, and a movable rod pivotally attached to the upper end portion of the fixed rod 10 so as to be openable and closable between each other. 11. The fixed rod 10 is made of a metal plate, and its upper end is bent toward the side away from the insulating operation rod 2 through the intermediate inclined portion 10a. A grounding lead wire 12 connected to the grounding metal fitting 4 is connected to the lower end portion of the fixing rod 10, and a guide plate 13 for restraining the lead wire 12 is coupled to guide the lead wire 12 downward.

  The movable rod 11 is rotatably supported on the upper end portion of the fixed rod 10 by a pivot pin 14 and extends downward. The upper part of the movable rod 11 has an upper guide part 11a for guiding the trolley line T to the receiving position of the trolley line T in the front-rear direction while coming into contact with the trolley line T from below as the hook metal fitting 3 is raised. It has a lower guide portion 11b that continues downward from the portion 11a and guides it to the receiving position of the trolley wire T in the vertical direction. The lower end portion has an entry guide portion 11c that is continuous with the lower guide portion 11b and obliquely upwards obliquely upward from the lower end of the movable rod 11 in a direction away from the insulating operation rod 2, and for receiving the trolley wire T at the upper portion. Arc-shaped holding recess 11d. The lower part of the movable rod 11 is pulled in the direction of narrowing the distance from the fixed rod 10 by a hinge bolt 15 and a spring 16 near the lower side of the pivot pin 14. Further, a stopper 11e formed of a ball plunger protrudes from the lower side surface of the movable rod 11.

  A rotating cam 17 that maintains a distance from the fixed rod 10 is pivotally attached to the lower end portion of the movable rod 11 so as to be rotatable upward. The rotation cam 17 maximizes the distance from the fixed rod 10 at a substantially horizontal fall position, and narrows the distance as it stands up. The distal end surface of the rotating cam 17 is formed in an arc shape so as to stand up smoothly while in contact with the fixed rod 10. The rotating cam 17 that rises when the trolley wire T enters between the movable rod 11 and the fixed rod 10 and is disposed in the holding recess 11d is fixed to the sliding contact surface of the rotating cam 17 with the movable rod 11. For this purpose, it has an engagement hole 17a that engages with the stopper 11e. An operating lever 18 for setting extends in the longitudinal direction of the rotating cam 17.

  As shown in FIG. 1, the grounding metal fitting 4 is made of a metal plate, and has rail clamps 4a whose both ends rise so as to receive both flanges below the rail through the rail. The rail clamp 4a is used to fasten a bolt 4b inserted on one end side and fix it to a rail flange. A connecting portion 4c for connecting the lead wire 12 continuously extends at one end of the rail clamp 4a.

  In the grounding operation using the voltage detection grounding device 1, the worker first attaches the end of the detection grounding wire 9 of the voltage detection alarm 8 to the rail and then connects it, and then supports the tip of the insulating operation rod 2. The hook 5 is hooked on the trolley wire T and the voltage detection alarm 8 confirms that no voltage is applied to the trolley wire T. Next, after attaching the grounding metal fitting 4 to the rail, the hook metal fitting 3 is lifted by the hanging rope 6 while the insulation operation rod 2 is hung on the trolley wire T. At this time, the hook metal fitting 3 rises and the trolley wire T relatively moves downward along the upper guide portion 11a and the lower guide portion 11b. As shown in FIG. 4, when the lower end position (a in the figure) of the movable rod 11 has passed, the hook fitting 3 is displaced to the trolley line T side. Here, if the hook metal fitting 3 is lowered by the suspension rope 6, it enters along the entry guide portion 11 c toward the space between the movable rod 11 and the fixed rod 10 widened by the rotating cam 17. When the hook metal fitting 3 is further lowered, the trolley wire T enters the inside of the hook metal fitting 3 while pushing up the rotary cam 17 and the lever 18, and the rotary cam 17 rotates upward along with this, and is fixed to the movable rod 11. When the distance from the flange 10 is narrowed and the trolley wire T reaches the holding recess 11d (b in the figure), the movable bolt 11 and the fixed rod 10 firmly hold the trolley wire T by the hinge bolt 15 and the spring 16. To do. Therefore, even if a voltage is applied to the trolley wire T for some reason, it is grounded by the ground metal fitting 4 from the hook metal fitting 3 through the lead wire 12, so that an electric shock accident during construction work is effectively prevented. When the trolley wire T is disposed in the holding recess 11d, the rising rotary cam 17 is fixed at this position with the engaging hole 17a engaged with the stopper 11e. It is held in a state where the interval of is narrowed.

  On the other hand, when removing the voltage detection grounding device 1, when the hook metal fitting 3 is first lifted by the hanging rope 6, the trolley wire T is relatively lowered between the movable rod 11 and the fixed rod 10. At this time, the trolley wire T retreats while being pushed and spread between the movable rod 11 and the fixed rod 10 against the urging force of the spring 16. When the distance between the trolley wire T and the fixed rod 10 becomes the minimum while the trolley wire T passes the entry guide portion 11c and exceeds the lower end position (c in the figure) of the movable rod 11, the lower end of the movable rod 11 is moved to the trolley. It is arranged outside the center of the line T (on the fixed rod 10 side). Even if the hook metal fitting 3 is suspended by the hanging rope 6 as it is, the hook metal fitting 3 is detached without the movable hook 11 being caught by the trolley wire T. Therefore, the hook metal fitting 3 is lowered to the ground as it is, and then the insulating operation rod 2 The ground metal fitting 4 can be collected.

  Another embodiment is shown in FIGS. In the figure, the same components as those of the previous embodiment are denoted by the same reference numerals and description thereof is omitted. In the figure, a stopper piece 21 for holding a distance from the fixed rod 10 is fixed to both side surfaces of the lower end portion of the movable rod 11 of the hook metal fitting 20. The end face of the stopper piece 21 facing the fixed rod 10 is provided substantially parallel to the fixed rod 10.

  A slide cam 22 is provided on the fixed rod 10 on the movable rod 11 side. The slide cam 22 is supported so as to be vertically slidable along the fixed rod 10. A long hole in the vertical direction is formed at the lower portion of the slide cam 22 from the lower end, and a bolt protruding from the fixing rod 10 is passed through and is prevented from being removed by a nut. Both sides of the upper portion of the slide cam 22 are regulated by a slide guide 23 having a substantially U-shaped cross section fixed to the fixed rod 10 to guide the vertical movement. On both sides of the upper end of the slide cam 22, there are claw portions 22a refracted in an L shape. The slide cam 22 can push up the claw portion 22a to a trolley line T that is disposed between the lower end portion of the movable rod 11 and the fixed rod 10 and moves upward, and the claw portion 22a slides on the end surface of the stopper piece 21. While moving, a predetermined distance between the movable rod 11 and the fixed rod 10 is maintained. At the upper part of the slide cam 22, there is an engagement recess 22 b that engages with an engagement protrusion 24 constituted by a ball plunger that protrudes to the upper part of the fixing rod 10 at a substantially upper limit position where the claw part 22 a exceeds the stopper piece 21. The slide cam 22 is fixed when the slide cam 22 is pushed up to the trolley line T.

  Also in the grounding operation using the hook metal fitting 20 of the voltage detection grounding device, the hook metal fitting 20 is pulled up by the hanging rope 6 after the insulation operating rod 2 is hung on the trolley wire T as in the previous embodiment. Manipulate. As shown in FIG. 7, when the trolley wire T reaches the lower end position of the movable rod 11 (a in the figure), the hook fitting 20 is displaced to the trolley wire T side, and the hook fitting 20 is lowered by the suspension rope 6 here. When operated, the trolley wire T enters between the movable rod 11 and the fixed rod 10 while pushing up the claw portion 22a of the slide cam 22. At this time, since the gap between the movable rod 11 and the fixed rod 10 is widened because the claw portion 22a is in contact with the stopper piece 21, the trolley wire T is received without difficulty. Since the claw portion 22a of the slide cam 22 exceeds the stopper piece 21 until the trolley wire T is received in the hook metal fitting 20 and reaches the position of the holding recess 11d (b in the figure) of the movable rod 11, it is movable. The hook 11 firmly holds the trolley wire T by the spring 16. In this state, the slide cam 22 is fixed by engaging the engagement recess 22b and the engagement protrusion 24. If the hook metal fitting 20 is pulled up with the suspension rope 6 to remove the voltage detection grounding device 1, the trolley wire T is pushed out while spreading between the movable rod 11 and the fixed rod 10, and the tip of the movable rod 11 is moved. If the hook metal fitting 20 is raised to a position exceeding the trolley wire T (c in the figure), the distance between the tip of the movable rod 11 and the slide cam 22 is minimized. The hook metal fitting 3 can be lowered to the ground without being caught on T.

  Yet another embodiment is shown in FIGS. In the figure, the fixing hook 10 of the hook metal fitting 25 is divided into upper and lower parts via a hinge 26 at the middle part, and is joined so as to be bent up and down. The slide cam 22 maintains an upright state by crossing the upper and lower joints of the fixed rod 10 at the lower position, but bends the fixed rod 10 by moving away from the joint at the upper position. Further, an extension spring 27 is provided on the rear part of the fixed rod 10 (on the right side in FIG. 8) so as to draw the fixed rod 10 to the falling side. The lead wire 12 is electrically connected to the upper portion of the fixed rod by a flexible copper wire 12a.

  In the same manner as in the previous embodiment, after the insulation operating rod 2 is hooked on the trolley wire T, the hook metal fitting 20 is pulled up by the suspension rope 6 so that the trolley wire T is movable as shown in FIG. If the hook metal fitting 20 is lowered by the hanging rope 6 after the lower end position (a in the figure) of the hook 11 is exceeded, the movable hook 11 and the fixed hook 10 are brought into contact with the stopper piece 21. The trolley wire T can be smoothly received and placed at the position (b in the figure) in the holding recess 11d of the movable rod 11, and the hook metal fitting 25 can be attached to the trolley wire T. it can. Thereafter, when the hook metal fitting 25 is pulled up with the suspension rope 6, the upper and lower couplings of the fixed rod 10 are released while the slide cam 22 is fixed at the upper position, so that the tip of the movable rod 11 is connected to the trolley wire T. When the hook fitting 25 rises to a position beyond the upper limit, the upper part of the fixing rod 10 falls over by the pulling of the extension spring 27 at the hinge 26 and moves away from the position of the trolley wire T (c in the figure). If 25 is suspended, it can be suspended without difficulty.

  The present invention is applied to a grounding device that is attached to a trolley line in order to confirm a power failure state of the trolley line for the construction of a train line and to ground the construction section.

It is a front view of the voltage detection grounding device of a 1st embodiment. It is a side view of a voltage detection grounding device. It is a side view of the upper end part of a voltage detection grounding device. It is a front view of the hook metal fitting of the state hooked on the trolley wire. It is a front view of the hook metal fitting of a 2nd embodiment. It is a side view of the hook metal fitting of a 2nd embodiment. It is a front view of the hook metal fitting of the state hooked on the trolley wire in a 2nd embodiment. It is a front view of the hook metal fitting of a 3rd embodiment. It is a side view of the hook metal fitting of a 3rd embodiment. It is a front view of the hook metal fitting of the state hooked on the trolley wire in a 3rd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric detection grounding device 2 Insulation operation rod 4 Grounding metal fitting 3 Hook metal fitting 5 Support hook 6 Hanging rope 7 Support pulley 8 Electric detection alarm 10 Fixing rod 12 Lead wire
11 Movable rod 11a Upper guide portion 11d Holding recess 11e Stopper 12a Flexible copper strand 15 Hinge bolt 16 Spring 17 Cam member 17a Engagement hole 18 Operation lever 20 Hook fitting 21 Stopper piece 22 Slide cam 22a Claw portion 22b Engagement recess 23 Slide guide 24 Engaging projection 25 Hook fitting 26 Hinge 27 Extension spring T Trolley wire

Claims (4)

Provided with an insulation operation rod with a contact fitting at the tip and a voltage alarm on the way, and a hook fitting to which the grounding lead wire is connected, and the contact fitting is brought into contact with the trolley wire to apply voltage to the trolley wire In the voltage detection grounding device for the trolley wire, which hooks the hook metal fitting to the trolley wire and grounds the trolley wire with no voltage applied,
The insulated operating rod, which a conductive support hook to fasten over the trolley line, a hanging rope Tsu支the hook fitting, the hanging rope is Kai hung, suspended to allow the lifting operation of the hook fitting from below A support pulley for supporting the rope ,
The hook metal fitting is a conductive fixing hook locked to the hanging rope,
It is pivotally attached to the upper end of the fixed rod so as to be openable and closable with the fixed rod in the front-rear direction, and the lower end is pulled by a spring in a direction approaching the fixed rod. Open position where the trolley wire can be received between the fixed hook, the holding position for holding the trolley wire between the fixed hook by lowering the hook metal using the hanging rope, and the hook metal being raised by the hanging rope A conductive movable rod that can be moved between a locked position where the retraction is prevented by narrowing the distance between the fixed rod and the spring by operating and separating the trolley wire from between the fixed rod and
An engagement position that interposes between the fixed rod and the movable rod and opens the gap between the movable rod and the fixed rod against the spring force and holds the movable rod in the open position, and is received from the engagement position . A cam member supported by the movable rod or the fixed rod so that it can be moved between a release position that is pushed up by the trolley wire and leaves the intervention between the two and does not prevent the movable rod from being pulled to the fixed rod ;
An engagement means with a movable rod or a fixed rod for holding the cam member in the release position ,
A trolley wire voltage detection grounding device that allows entry of a trolley wire into a hook fitting while preventing re-entry after the trolley wire is detached from the hook fitting.   The cam member has a base end pivotally attached to either the movable rod or the fixed rod, and rotates in the vertical direction between the engagement position where the tip contacts the other and the release position away from the other. The trolley wire voltage detection grounding device according to claim 1, wherein the trolley wire voltage detection grounding device is provided.   The cam member is provided on one of the fixed rod and the movable rod so as to be slidable in the vertical direction, the engagement position intervening between the fixed rod and the movable rod, and the release position separated from the other The trolley wire voltage detection grounding device according to claim 1, wherein the trolley wire voltage detection grounding device is movable between the two. The fixing rod is coupled to the upper and lower halves in a refractionable manner via a hinge, the suspension rope is locked to the lower half, and the lower half is moved by a spring so that the upper half is tilted away from the insulating operation rod. Pulled to the side,
The cam member is provided so as to be slidable up and down along the fixed hook, and prevents refraction by crossing over the hinge of the fixed hook at the engagement position, and refracts by exceeding the hinge at the release position. The trolley wire voltage detection grounding device according to claim 3, wherein the trolley wire voltage detection grounding device is allowed.

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