JP2014057440A - Lightning arrester grounding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a conventional problem of measurement of ground resistance of ground electrode, in that sufficient consideration for safety for workers is required and arrangement of skilled workers is also required, resulting in lots of time and labor required for arrangement, adjustment, and so on of workers.SOLUTION: In this invention, a sub-support post 2 is coupled to a main support post 1 via a coupling member 3, and also a lightning conductor 7 is coupled to the sub-support post via a coupling member 8. Additionally, a conductive rod guide member 13, by which a conductive rod 12 is supported so as to be movable vertically, is attached to the coupling member that couples the sub-support post and the lightning conductor 7. Furthermore, a conductive plate member 9 is fixed to a lightning support member 5 on which a lightning arrester 6 is installed, via an insulation member 4 disposed at the upper end of the sub-support post. A contact terminal member 11, with which the leading end of the conductive rod comes into contact when the conductive rod is moved upward, is attached to the conductive plate member. Accordingly, the number of workers including, for example, an arrangement of lookouts, can be reduced, the safety of workers can also be ensured, and, furthermore, labor and time required for measurement of the ground resistance of a lightning conductor can be significantly reduced.

Description

  The present invention relates to a lightning rod grounding device constructed to protect a building itself and electrical / communication equipment arranged in a building from a lightning strike, and in particular, to measure the grounding resistance of a ground electrode. The present invention relates to a lightning rod grounding device provided with a grounding resistance measuring auxiliary member.

  The grounding resistance buried in the ground changes with time. When the ground resistance value is larger than a predetermined value, when an excessive current is discharged from the ground electrode to the inside of the ground, there is a possibility that the ground potential increases. For this purpose, the ground resistance of the ground electrode is regularly measured.

  After placing two auxiliary electrodes on the ground in the vicinity of the ground electrode to be measured, connect the ground electrode and the two auxiliary electrodes to the ground resistance measuring device, and ground them with the ground resistance measuring device. An example of a ground resistance measuring device that measures the ground resistance of an electrode is disclosed in Patent Document 1.

  In addition, a lightning rod installed at the upper end of the steel tower, connected to the lightning rod, along the steel tower, extending to the lightning conductor, and connected to the lightning conductor, and grounded electrode buried in the ground As an example, a lightning rod grounding device comprising the following is well-known before the present application, as disclosed in Patent Document 2.

JP-A-11-002650

Japanese Patent Laid-Open No. 2001-23793

  In order to measure the ground resistance in the above-described lightning rod grounding device, it is necessary to place two auxiliary electrodes on the ground in the vicinity of the ground electrode to be measured, and the lightning rod installed at the upper end of the steel tower. Remove the lightning conductor from the connection terminal for connecting the lightning conductor on the pedestal, and then connect the upper end of the lead wire whose lower end is connected to the ground resistance measuring instrument to the center conductor of the lightning conductor. Thus, the ground resistance of the ground electrode is measured.

  As described above, in order to measure the ground resistance of the ground electrode, the lightning conductor is removed from the connection terminal for connecting the lightning conductor arranged on the base of the lightning rod arranged at the upper end of the tower, and then the lower end It is necessary to perform work such as connecting the upper end of the lead wire, which is connected to the ground resistance measuring instrument, to the center conductor of the lightning conductor at the high position of the upper end of the tower. It is necessary to arrange a large number of workers including a guard for ensuring the safety of workers working at high places and a worker measuring ground resistance on the ground. As described above, the work of measuring the grounding resistance of the ground electrode requires sufficient consideration for the safety of the worker, and requires a great deal of time and labor, including the ascending and descending of the worker to and from the steel tower. There is a problem of becoming.

  In addition, it is necessary to arrange skilled workers who can work at high places at the upper end of the tower, such as connecting to the center conductor of the lightning conductor, and it takes a lot of time to arrange and adjust such skilled workers. There is a problem that labor is required.

  An object of the present invention is to solve the problems of the above-described conventional lightning rod grounding device.

  In order to achieve the above-described object, the present invention provides a lightning rod grounding device that firstly connects a sub support column to a main support column via a connecting member, and connects the sub support column to the sub support column via a connecting member. In addition, the connecting member for connecting the lightning conductor, and connecting the sub-support pillar and the lightning conductor, is attached with a conductive rod guide member for supporting a vertically movable conductive rod, The conductive rod body guide member is formed with a through hole into which the conductive rod body is inserted in an insulated state, and the lightning rod is connected via an insulating member disposed at the upper end of the sub-support column. A conductive plate member is fixed to the installed lightning rod support member, and when the conductive rod moves upward, a contact terminal with which the tip of the conductive rod contacts the conductive plate member Second, the guide member for the conductive rod is attached to the guide member. A pulley member around which the lead wire is wound is attached, and the leading end of the lead wire is fastened to the lower end portion of the conductive rod, and the lead wire is wound around the main support column or the ground. It is made to wrap around a take-up member.

  Since this invention has the structure mentioned above, there can exist the effect described below.

  As described above, the sub support column is connected to the main support column via the connecting member, the lightning conductor is connected to the sub support column via the connecting member, and the sub support column and the lightning conductor are connected. A conductive rod guide member for supporting a vertically movable conductive rod is attached to the connecting member to be connected, and the conductive rod is insulated in the conductive rod guide member. A through-hole to be inserted is formed, and further, a conductive plate member is fixed to the lightning rod support member on which the lightning rod is installed via an insulating member disposed at the upper end of the sub-support column. The conductive plate member is attached with a contact terminal member that abuts the tip of the conductive rod when the conductive rod moves upward. The connection between the lightning conductor connecting terminal and the lightning conductor arranged on the member has been released. Since it is possible to measure the grounding resistance of lightning conductors on the ground without the need for reconnection, the number of workers, including the placement of guards, can be reduced and the safety of workers can be reduced. In addition, the labor and time required for measuring the ground resistance of the lightning conductor can be greatly reduced.

  A pulley member around which the lead wire is wound is attached to the guide member for the conductive rod, and the leading end of the lead wire is fastened to the lower end of the conductive rod, and the lead wire is connected to the main support column. Alternatively, since it is wound around the lead winding member installed on the ground, the conductive rod is moved upward, and the tip of the conductive rod is brought into contact with the contact terminal member, so that it can be easily and quickly performed. The contact resistance can be measured.

FIG. 1 is a partial front view including a partial cross section of a lightning rod grounding device of the present invention. FIG. 2 is an overall front view including a partial cross-section of the lightning rod grounding device of the present invention. FIG. 3 is a partially exploded perspective view of the lightning rod grounding device of the present invention. 4 is a perspective view of the assembled lightning rod grounding device of the present invention shown in FIG. FIG. 5 is a partially exploded perspective view of the lightning rod grounding device of the present invention. FIG. 6 is a perspective view of the pulley member disposed on the guide member for the conductive rod constituting the lightning rod grounding device of the present invention. FIG. 7 is a partial perspective view of the lightning rod grounding device of the present invention. FIG. 8 is an overall front view including a partial cross-section of the lightning rod grounding device of the present invention.

  Examples of the present invention will be described below. However, the present invention is not limited to the examples as long as the gist of the present invention is not exceeded.

  First, the overall configuration of the lightning rod grounding device of the present invention will be outlined with reference to FIG.

  1 is a main support column in which a lower portion is embedded in the ground G, and 2 is a sub support column connected to the main support column 1 by an appropriate number of main support column / sub support column connecting members 3. Yes, the lower end of the sub-support pillar 2 is configured not to reach the ground G. 4 is an insulating member such as an insulator disposed at the upper end of the sub-support pillar 2, 5 is a lightning rod support member, and a lightning rod 6 is installed at the upper end of the lightning rod support member 5. Yes.

  7 is a known lightning conductor made of a center conductor and an insulator covering the center conductor, and the lightning conductor 7 is connected to the sub-support pillar 2 by a suitable number of sub-support pillars / lightning conductor connecting members 8. Yes. Reference numeral 9 denotes a horizontal conductive plate member fixed to the lightning rod support member 5, and the upper central conductor 7a of the lightning conductor 7 from which the insulating coating on the top of the lightning conductor 7 is peeled off is a conductive plate. The lightning conductor 7 is attached to the conductive plate member 9 by being connected to the vicinity of the tip portion of the member 9 by a known lightning-resistant cable connection terminal 10. Further, the lightning conductor 7 extends downward along the main support column 1 and the sub support column 2 and the lower region of the lightning conductor 7 is buried in the ground G. A lower center conductor 7b as a ground electrode embedded in the ground G is formed by peeling off the insulating cover of the lower region of an appropriate length of the lightning conductor 7 embedded in the ground.

  A contact terminal member 11 is attached to the conductive plate member 9 located between the lightning rod support member 5 and the lightning conductor connecting terminal 10 by suitable fixing means such as bolts and nuts.

  Reference numeral 12 denotes a conductive rod that can move up and down along the sub-support column 2. The sub-support column / lightning conductor connecting member 8 that connects the sub-support column 2 and the lightning conductor 7 includes a conductive rod 12. The guide member for the conductive rod, in which the conductive rod 12 is guided so as to move up and down in a stable state and the through hole into which the conductive rod 12 is inserted is formed when it moves in the vertical direction. 13 is attached. In addition, at least a portion of the conductive rod guide member 13 that contacts the conductive rod 12 is formed of an insulating material.

  Further, the conductive rod 12 passes through a through hole formed in the conductive rod guide member 13 and into which the conductive rod 12 is inserted. A stopper 12 a is attached to the conductive rod 12 so as not to fall off the guide member 13. In this embodiment, as shown in FIG. 1, an example is shown in which a stopper 12a is attached to the conductive rod 12 of the conductive rod guide member 13 located at the top. However, the stopper 12a can also be attached to the conductive bar 12 other than the conductive bar guide member 13 located at the top. B is a known fastening band attached to the main support column 1, and a known saddle b <b> 1 that holds the known lightning conductor 7 is attached to the tip of the fastening band B.

  P is a pulley member, which will be described later, disposed on the sub-support pillar / lightning conductor connecting member 8 located at the lowermost part.

  Next, each member disposed in the lightning rod grounding device for measuring the grounding resistance will be described with reference to FIG.

  W is a lead winding member, and the lead winding member W can be installed on the ground G or on the main support column 1. FIG. 2 shows an example in which the lead wire winding member W is placed on the upper surface of the ground G. The lead wire winding member W has a horizontal portion w1 placed on the ground G and opposing vertical portions w2 extending upward from both ends of the horizontal portion w1. A rotating shaft w4 is bridged to the opposing vertical portion w2 via an appropriate bearing w3, and a drum w5 made of an insulating material is fixedly attached to the rotating shaft w4. Still further, a rotation handle w6 for rotating the drum w5 is disposed on the rotation shaft w4.

  M is a known ground resistance measuring device for measuring the ground resistance of the ground electrode. When measuring the ground resistance, the ground resistance measuring device M is positioned near the main support column 1 and the sub support column 2. It is configured to be placed on the ground G.

  Next, the main support column / sub-support column connecting member 3 and the like will be described with reference to FIGS. 3 and 4.

  The main support column / sub support column connecting member 3 for connecting the main support column 1 and the sub support column 2 has a pair of band division pieces 3 ′, and one band division piece 3 ′ has a main support column. A cylindrical auxiliary support 3a perpendicular to the column 1 is attached by appropriate fixing means such as welding. The semicircular portions 3b of the pair of band split pieces 3 'are arranged on the peripheral wall of the main support column 1 and formed on attachment pieces 3c formed at both ends of the pair of band split pieces 3' facing each other. A pair of band split pieces 3 ′ is attached to the main support pillar 1 by inserting a straight bolt B 1 into the through hole 3 c 1 and then screwing a nut (not shown).

  Further, the auxiliary support 3a attached to one of the band division pieces 3 'is provided with a plate-like sub-support by a U-shaped bolt / nut fixing member F1 including a known U-shaped bolt B2 and a nut N2. A column support 3d is attached. Furthermore, the auxiliary support pillar 2 is attached to the auxiliary support 3a by a U-shaped bolt / nut fixing member F1. In this manner, the main support column 1 and the sub support column 2 are connected by the main support column / sub support column connecting member 3.

  Next, the auxiliary support column / lightning conductor connecting member 8 and the like will be described with reference to FIGS.

  Similarly to the main support column / sub support column connecting member 3 described above, a pair of band split pieces 8 ′ are attached to the sub support column 2, and the sub support column 2 is attached to one band split piece 8 ′. The auxiliary support 8a having a cylindrical shape or the like is attached perpendicularly to the substrate by an appropriate fixing means such as welding. Since the attachment of the pair of band split pieces 8 'to the sub support pillar 2 is the same as that of the main support pillar 1 of the pair of band split pieces 3', detailed description thereof is omitted.

  8b is a plate-shaped lightning conductor support that is fixed to the tip of the auxiliary support 8a perpendicularly to the auxiliary support 8a. As shown in FIG. 4, the lightning conductor 7 is configured to be connected to the auxiliary support column 2 via the U-shaped bolt / nut fixing member F <b> 1 described above. Further, the above-described conductive rod guide member 13 is attached to the auxiliary support 8a by the above-described U-shaped bolt / nut fixing member F1.

  The conductive rod guide member 13 is formed of a vertical portion 13a attached to the auxiliary support 8a via a U-shaped bolt / nut fixing member F1, and a horizontal portion 13b extending from the upper end of the vertical portion 13a. Has been. An insulator 13c having a through hole 13c1 through which the conductive rod 12 is inserted is attached to the horizontal portion 13b. The conductive rod 12 inserted through the through hole 13c1 of the insulator 13c is It is comprised so that it may not contact the electroconductive part of the guide member 13 for electroconductive rods.

  Of the conductive rod guide member 13, the vertical portion 13a located below the horizontal portion 13b of the conductive rod guide member 13 located at the lowermost portion is connected to the pulley member P by a known bolt / nut member. Is attached. The pulley member P includes a base p1 having a substantially U-shaped planar shape, and a pulley p2 rotatably disposed on a shaft member p1b that is bridged with opposing vertical portions p1a constituting the base p1. doing.

  As described above, the contact terminal member 11 attached to the conductive plate member 9 positioned between the lightning rod support member 5 and the lightning conductor connecting terminal 10 has an inverted L-shape comprising a horizontal portion 11a1 and a vertical portion 11a2. The front plate 11a has a back plate 11b opposed to the vertical portion 11a2 of the inverted L-shaped front plate 11a across the conductive plate member 9, and the vertical portion 11a2 of the inverted L-shaped front plate 11a. And the back plate 11b so that the conductive plate member 9 is clamped by appropriate fixing means such as bolts and nuts so that the contact terminal member 11 is conductively attached to the conductive plate member 9. It has been.

  Next, measurement of the ground resistance of the ground electrode (the lower center conductor 7b located at the lower end of the lightning conductor 7 embedded in the ground G) will be described with reference to FIGS.

  When a lightning rod grounding device with a measurement auxiliary member is newly installed, first, the lead wire winding member W is installed on the ground G or the main support column 1. Next, a known lead wire C wound around a suitable drum is pulled out from the drum, and the lead wire C drawn out is a conductive rod located at the lowermost portion of the conductive rod guide member 13. After winding the pulley p2 of the pulley member P attached to the guide member 13 about half a circumference, the center conductor c1 exposed by peeling off the insulating coating at the tip of the lead wire C is used as a known tightening band or It attaches to the lower end part of the electroconductive rod 12 with suitable fasteners E, such as a fastening clip. Thereafter, the lead wire C is further pulled out from an appropriate drum, and the lead wire C is wound around the drum w5 of the lead wire winding member W an appropriate number of times as shown in FIG. In this way, only the ground resistance measuring device M is not installed in FIG. In this way, the work of newly installing the lightning rod grounding device is completed.

  When the grounding resistance of the lightning conductor 7 is measured from the state where the lightning rod grounding device is newly installed as described above, the rotation handle w6 of the lead wire winding member W is turned, the drum w5 is rotated, and the lead By further winding the wire C around the drum w5, the conductive rod 12 is moved upward, and the tip of the conductive rod 12 is moved to the contact terminal member 11 as shown in FIG. It abuts on the horizontal part 11a1. Thus, when measuring the grounding resistance of the lightning conductor 7 at the lower end of the lead wire C while maintaining the state where the tip of the conductive rod 12 is in contact with the horizontal portion 11a1 of the contact terminal member 11, The ground resistance measuring instrument M is brought into connection and the ground resistance measuring instrument M is turned on to read the ground resistance of the lightning conductor 7.

  After measuring the ground resistance of the lightning conductor 7, the switch of the ground resistance measuring device M is turned off, and then the drum w 5 is rotated in the direction opposite to the winding direction of the lead wire C around the drum w 5, thereby making the conductivity The rod 12 is moved downward, and the tip of the conductive rod 12 is moved away from the horizontal portion 11a1 of the contact terminal member 11 to return to the original state shown in FIG. Thereafter, the lower end portion of the lead wire C is removed from the ground resistance measuring instrument M.

  As described above, in FIG. 2, when only the ground resistance measuring device M is not installed (ground resistance measurement preparation state), as shown in FIG. 2, it is attached to the conductive rod 12. The stopper 12a is configured to abut against the insulator 13c of the conductive rod guide member 13 and prevent the conductive rod 12 from moving downward. Further, in the ground resistance measurement preparation state, the leading end portion of the conductive rod 12 does not come into contact with the horizontal portion 11a1 of the inverted L-shaped front plate 11a of the contact terminal member 11 attached to the conductive plate member 9. It is configured.

  In the conventional lightning rod grounding device, each time the grounding resistance is measured (maintenance is performed), the worker rises to the steel tower and is disposed near the tip of the conductive plate member 9 and connected to the lightning conductor connecting terminal 10. Must be released from the connection between the lightning conductor 7 and the grounding resistance, and then the worker again climbs to the steel tower and is located near the tip of the conductive plate member 9. The lightning conductor 7 must be connected to the connection terminal 10 for use. However, in the present invention, the worker climbs to the steel tower and does not need to release or reconnect the connection state between the lightning conductor connecting terminal 10 and the lightning conductor 7 arranged on the conductive plate member 9, Since the ground resistance of the lightning conductor 7 can be measured on the ground, it is possible to reduce the number of workers, including the placement of guards, and to ensure the safety of the workers. The labor and time for measuring the grounding resistance of 7 can be greatly reduced.

  In addition, in order to disconnect or reconnect the lightning conductor connecting terminal 10 and the lightning conductor 7, it is necessary to work at a high place at the upper end of the steel tower in the conventional case. Therefore, it is necessary to arrange skilled workers, and it takes a lot of time and labor to arrange and adjust such skilled workers. Since no arrangement is required, labor and time for measuring the ground resistance of the lightning conductor 7 can be greatly reduced.

1 ····································· 2 Support pillar connecting member 5 .... lightning rod support member 7 .... lightning conductor 8 .... secondary Support pillar / lightning conductor connecting member 10 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Connection terminal for lightning conductor 11 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Connection terminal member 12 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ Conductive bar body 13 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Conductive bar body guide member C ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Lead wire M ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ ・ Earth resistance measuring instrument P ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Pulley member W ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Lead wire winding member

Claims (2)

  A sub-support column is connected to the main support column via a connecting member, and a lightning conductor is connected to the sub-support column via a connecting member, and the sub-support column and the lightning conductor are connected to each other. A conductive rod guide member for supporting a vertically movable conductive rod is attached to the connecting member to be connected, and the conductive rod is insulated in the conductive rod guide member. A through-hole to be inserted is formed, and further, a conductive plate member is fixed to the lightning rod support member on which the lightning rod is installed via an insulating member disposed at the upper end of the sub-support column. The lightning rod grounding device is characterized in that the conductive plate member is attached with a contact terminal member that contacts the tip of the conductive rod when the conductive rod moves upward.   A pulley member around which the lead wire is wound is attached to the conductive rod body guide member, and the leading end of the lead wire is fastened to the lower end portion of the conductive rod body. 2. The lightning rod grounding device according to claim 1, wherein the lightning rod grounding device is wound around a main support pillar or a lead winding member installed on the ground.

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