JP2017163763A - Tip tool and work method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure safety of a worker which conducts attachment work of a nut falling prevention cap.SOLUTION: A tip tool 200 includes: a body part 201; a cap attachment part 202 which is provided at an inner side of the body part 201 and holds a nut falling prevention cap 100 including a flange and forming an annular shape; a side surface opening 204a which is provided on a side surface 204 of the body part 201 and allows the nut falling prevention cap 100 to be inserted into or removed from the cap attachment part 202; and an upper surface opening 203a which is provided on an upper surface 203 of the body part 201 and opens continuing into the side surface opening 204a.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a tip tool and a working method used for indirect hot wire work.

  In the indirect hot line work that realizes the work on the high voltage live line without directly touching the high voltage live line (high voltage charge line), the bolt and nut for fixing the electrical equipment can be tightened using an insulating operation rod. In such indirect hot wire work, in order to prevent the nuts tightened on the bolts from being dropped, after tightening the nuts on the bolts using an insulating operation rod, a nut drop prevention cap that prevents the bolts from falling off is attached to the bolts. It is attached.

  The nut drop prevention cap has a ring shape with a through hole of the same size as the diameter of the bolt, and is attached to the bolt by fitting it into the bolt with the nut tightened from the front end side of the bolt. It is done.

  Specifically, conventionally, for example, a nut provided with a pair of members that are pivotally supported so as to open and close in accordance with opening and closing of a gripping tip tool such as an insulating jacket and that has a recess into which a nut fall-off prevention tool is fitted. A tool for attaching and detaching a stopper, and removing the nut fall prevention tool without dropping it by opening the tip tool for gripping with the pair of members inserted between the nut and the nut fall prevention tool. There has been a technique that enables this (see, for example, Patent Document 1 below).

  Also, specifically, conventionally, for example, a pair of members that open and close in accordance with opening and closing of a gripping tip tool such as an insulating jacket, etc. have been provided, and the gripping tip tool is closed on the surfaces of each member facing each other. There has been a technique related to an adapter for indirect hot-wire construction in which a groove for forming a space into which a nut drop prevention cap fits is provided (see, for example, Patent Document 2 below).

Japanese Patent Laying-Open No. 2015-177678 Japanese Patent Laying-Open No. 2015-12646

  However, although the conventional technique described above can tighten a nut on a bolt using an insulating operation rod, when attaching a nut drop prevention cap to the bolt, an operator approaches the high-voltage charging line and the nut is attached to the bolt. There was a problem that it was difficult to ensure the safety of the workers, because it was necessary to attach a cap for preventing the dropout.

  In addition, when attaching the nut drop prevention cap to the bolt, the worker attached the armor to the high voltage charging line before approaching the high voltage charging line, and the worker approached the high voltage charging line and attached the nut drop prevention cap to the bolt. Later, after the worker left the high-voltage charging line to ensure safety, the work was performed in the procedure of removing the armor from the high-voltage charging line. For this reason, there is a problem that the work is complicated and the burden on the worker is large.

  An object of the present invention is to provide a tip tool and an operation method that can ensure the safety of an operator who performs an operation of attaching a nut drop prevention cap in order to eliminate the above-described problems caused by the prior art.

  In addition, the present invention eliminates the problems caused by the prior art described above, and improves the working efficiency of the work involving the work of attaching the nut drop prevention cap, thereby reducing the working time and work. It aims to provide a method.

  In order to solve the above-described problems and achieve the object, a tip tool according to the present invention is a tip tool used for indirect hot-line work, and is provided with a main body portion and an inner side of the main body portion, and includes a flange. A holding part that holds an annular cap, a side opening that is provided on a side surface of the main body part and allows the cap to be inserted into and removed from the holding part, and is provided on an upper surface of the main body part, and is continuous with the side opening. And an upper surface opening that opens.

  Further, in the tip tool according to the present invention, in the above invention, the holding portion includes a biasing member that biases the cap held by the holding portion from the lower surface side to the upper surface side of the main body portion. Features.

  In the tip tool according to the present invention, in the above invention, the main body portion has a substantially cylindrical shape, and the holding portion is movable along the opposing direction of the upper surface and the lower surface of the main body portion. And an urging member that urges the movable bottom plate from the lower surface side to the upper surface side, and holds the cap by pressing the cap against the upper surface by the urging member through the movable bottom plate. To do.

  In addition, the tip tool according to the present invention is characterized in that, in the above-mentioned invention, the holding portion includes a protrusion that comes into contact with a flange of a cap held by the holding portion.

  The working method according to the present invention includes, in the above invention, a main body, a holding portion for holding a ring-shaped cap provided on the inner side of the main body, and a side surface of the main body. A working method using a tip tool provided with a side opening provided to allow the cap to be inserted into and removed from the holding portion, and a top opening provided on the upper surface of the main body portion and continuously open to the side opening. A step of attaching the tip tool to the insulating operation rod, a step of loading the cap onto the holding portion of the tip tool, and an upper surface opening of the tip tool loaded with the cap and attached to the insulation operation rod. A step of inserting a tip of a bolt to be attached to the cap into the holding portion, and fitting the cap held by the holding portion into the bolt; and fitting the cap The bolt by operating the insulation operation rod to pass through the side opening, characterized in that including a step of removing the tool bit from the bolt.

  According to the tip tool and the working method according to the present invention, there is an effect that it is possible to ensure the safety of the worker who performs the work of attaching the nut drop prevention cap.

  Further, according to the tip tool and the working method according to the present invention, there are provided the tip tool and the working method capable of improving the working efficiency of the work accompanied by the work of attaching the nut drop prevention cap and shortening the working time. There is an effect that can be done.

It is explanatory drawing which shows the external appearance of a nut drop prevention cap. It is explanatory drawing (the 1) which shows the structure of the tip tool of Embodiment 1 concerning this invention. It is explanatory drawing (the 2) which shows the structure of the tip tool of Embodiment 1 concerning this invention. It is explanatory drawing (the 1) which shows the usage method of the tip tool of Embodiment 1 concerning this invention. It is explanatory drawing (the 2) which shows the usage method of the tip tool of Embodiment 1 concerning this invention. It is explanatory drawing (the 3) which shows the usage method of the tip tool of Embodiment 1 concerning this invention. It is explanatory drawing (the 4) which shows the usage method of the tip tool of Embodiment 1 concerning this invention. It is explanatory drawing (the 5) which shows the usage method of the tip tool of Embodiment 1 concerning this invention. It is explanatory drawing (the 1) which shows the modification of the tip tool of Embodiment 1 concerning this invention. It is explanatory drawing (the 1) which shows the structure of the tip tool of Embodiment 2 concerning this invention. It is explanatory drawing (the 2) which shows the structure of the tip tool of Embodiment 2 concerning this invention. It is explanatory drawing (the 3) which shows the structure of the tip tool of Embodiment 2 concerning this invention.

  Exemplary embodiments of a tip tool and a working method according to the present invention will be explained below in detail with reference to the accompanying drawings. The tip tool according to the embodiment of the present invention is used for attaching a nut drop prevention cap to a bolt into which a nut is screwed.

(Nut drop prevention cap configuration)
FIG. 1 is an explanatory view showing the appearance of a nut drop prevention cap. In FIG. 1, the nut drop prevention cap 100 includes a fixing portion 101 and a flange portion 102. The fixing portion 101 has a cylindrical shape in which a through hole 103 having a diameter that is the same as or slightly smaller than the diameter of a bolt to which the nut drop prevention cap 100 is attached is provided. The flange portion 102 is provided on one end side in the axial direction of the fixed portion 101, forms a through hole 103 together with the fixed portion 101, and has a substantially disk shape. The outer diameter of the flange portion 102 is larger than the outer diameter of the fixed portion 101 and spreads in a bowl shape from one end side of the fixed portion 101 to the outer peripheral side.

  The nut drop prevention cap 100 is formed using a material having flexibility and insulation, such as rubber. The nut drop prevention cap 100 is formed using a black rubber material in which carbon is kneaded in order to ensure weather resistance. The nut drop prevention cap 100 is a known technique and will not be described.

  The nut drop prevention cap 100 is a bolt arranged so that the axial direction is substantially parallel to the vertical direction, like a bolt (see reference numeral 501 in FIG. 5) for fixing a pin insulator (not shown). In order to prevent the nut screwed from the lower side in the vertical direction from falling off the bolt, the nut is attached to the bolt. The nut drop prevention cap 100 is attached to the bolt with the flange facing the nut screwed to the bolt.

  A nut that is screwed into a bolt that is arranged so that its axial direction is substantially parallel to the vertical direction may loosen due to vibrations caused by the wind, etc. Once loosened, it gradually loosens due to gravity. There is a risk of falling. The nut drop prevention cap 100 is attached to prevent the nut from falling off from such a bolt.

  The nut drop prevention cap 100 is not limited to the one attached to the bolt arranged so that the axial direction is substantially parallel to the vertical direction. It may be attached to a bolt arranged so that the axial direction is substantially parallel to the horizontal direction, and arranged along the direction in which the axial direction is inclined in the range between the vertical direction and the horizontal direction. It may be attached to a bolt to be made.

<Embodiment 1>
(Configuration of tip tool)
Next, the configuration of the tip tool according to the first embodiment of the present invention will be described. 2 and 3 are explanatory views showing the configuration of the tip tool according to the first embodiment of the present invention. In FIG. 2, the whole view which looked at the front-end tool of Embodiment 1 concerning this invention from the diagonal direction is shown. In FIG. 3, the state which looked at the front-end tool of Embodiment 1 concerning this invention from the front, the side surface, and the upper surface, respectively is shown.

  2 and 3, the tip tool 200 according to the first embodiment of the present invention includes a main body portion 201 having a substantially cylindrical appearance. The main body portion 201 is provided with a cap loading portion 202 that realizes a holding portion according to the present invention. The cap loading unit 202 includes an upper surface opening 203a provided on the upper surface 203 of the main body unit 201 and a side surface opening 204a provided on a side surface (front surface) 204 of the main body unit 201. The main body unit includes the upper surface opening 203a and the side surface opening 204a. A concave shape recessed inside 201 is formed.

  The upper surface opening 203a is larger than the outer diameter of the bolt to be attached to the nut drop prevention cap 100, and the nut drop prevention cap 100 fitted inside the main body 201 does not fall out in the axial direction of the main body 201. The opening is made with a width narrower than the outer diameter of the flange 102. The cap loading unit 202 receives insertion of bolts from the upper surface 203 of the main body unit 201 through the upper surface opening 203a.

  The upper surface opening 203a and the side surface opening 204a are continuous, and the bolt inserted into the cap loading unit 202 from the upper surface 203 of the main body 201 through the upper surface opening 203a is connected to the front side of the main body 201 through the side opening 204a. Can be pulled out from. When the main body 201 is viewed from the upper surface 203, the upper surface opening 203a opens the main body 201 in a shape that is cut out in a substantially U shape from the outer peripheral edge of the main body 201 toward the center. . Thereby, the bolt inserted from the upper surface 203 of the main body 201 through the upper surface opening 203a can be pulled out from the side surface opening 204a.

  The side opening 204a pulls out the bolt inserted from the upper surface 203 of the main body portion 201 from the front side, and further accepts insertion of the nut drop prevention cap 100 from the front side of the main body portion 201 to the cap loading portion 202. The opening is made in a step shape corresponding to the shape of the nut drop prevention cap 100. Specifically, the side opening 204a is configured such that when the main body 201 is viewed from the front, the nut drop prevention cap 100 is placed in a state where the axis of the main body 201 and the axis of the nut drop prevention cap 100 are aligned. The opening is formed in a shape projected from the front side of 201 to the front side of the main body 201.

  More specifically, the side opening 204a has a portion that opens with a width corresponding to the outer dimension of the flange portion 102 to accept insertion of the flange portion 102 of the nut drop prevention cap 100, and a fixing portion 101 of the nut drop prevention cap 100. A portion that opens with a width corresponding to the outer dimension of the fixing portion 101 to accept insertion, and a portion that opens with a width according to the diameter of the bolt in order to enable extraction of the bolt in the axial direction of the main body portion 201. A step shape consisting of three steps arranged in order of increasing width is formed.

  The concave portion formed by the cap loading portion 202 has a step shape in which the depth dimension differs in a plurality of stages in the diameter direction of the main body portion 201 according to the outer shape of the nut drop prevention cap 100. That is, the concave portion formed by the cap loading portion 202 includes a portion recessed from the side opening 204 a with a depth size corresponding to the outer dimension of the flange portion 102 and a depth dimension corresponding to the outer dimension of the fixing portion 101 of the nut drop prevention cap 100. The step shape is different in three steps: a concave portion and a concave portion having a depth corresponding to the external dimensions of the bolt. The depth according to the outer dimension of the flange is the deepest, the depth dimension according to the outer dimension of the fixing portion 101 of the nut drop prevention cap 100 is shallower than the depth dimension according to the outer dimension of the flange, and according to the outer dimension of the bolt. Deeper than the depth dimension.

  In the main body 201, a connection adapter 210 is provided on the other end side (lower surface side) in the axial direction. The connection adapter 210 includes a cylindrical adapter main body 211. In the adapter main body 211, a cylindrical member 212 is provided on the outer peripheral surface on one end side in the axial direction with the radial direction of the adapter main body 211 as the axial direction.

  An engagement pin 301 is provided on the inner peripheral side of the tubular member 212. The adapter body 211 is formed with a hole (not shown) through which the engagement pin 301 passes, and the engagement pin 301 is disposed so as to pass through the hole. The engagement pin 301 is slidable relative to the tubular member 212 along the axial direction of the tubular member 212.

  A stopper 213 having a disk shape and a diameter larger than the outer diameter of the cylindrical member is fixed to one end side of the engagement pin 301. One end of a tension coil spring 302 provided inside the cylindrical member 212 and on the outer peripheral side of the engagement pin 301 is fixed to the stopper 213. The other end of the tension coil spring 302 is fixed to the outer peripheral surface of the adapter main body 211. Accordingly, the stopper 213 is always pulled toward the adapter main body 211 by the tension coil spring 302, and the engagement pin 301 whose one end is fixed to the stopper 213 is always stuck in the axial direction of the adapter main body 211. It is so energized.

  In the adapter main body 211, a shaft hole 303 is provided on the outer peripheral surface on the other end side in the axial direction so as to be fitted to the tip of an insulating operation rod (see reference numeral 401 in FIG. 4). In the adapter main body 211, a substantially T-shaped groove 214 is provided on the outer peripheral surface of the shaft hole portion. The groove 214 constitutes a twist lock structure for fixing the adapter main body 211 to the tip of the insulating operation rod by engaging with a pin (see FIG. 4) provided at the tip of the insulating operation rod. Since the twist lock structure is a known technique, description thereof is omitted.

(How to use the tip tool 200)
Next, a method of using the tip tool 200 according to the first embodiment of the present invention will be described. 4-8 is explanatory drawing which shows the usage method of the tip tool 200 of Embodiment 1 concerning this invention. The tip tool 200 is used by attaching the tip tool 200 to the tip of the insulating operation rod 401. When attaching the tip tool 200 to the insulation operating rod 401, first, the stopper 213 is moved to a position where the tip of the engagement pin 301 does not protrude toward the inner peripheral side of the adapter main body 211 against the urging force of the tension coil spring 302. pull.

  Next, the adapter main body 211 is put on the lower end side of the main body 201 while the stopper 213 is pulled. At this time, the adapter main body 211 is placed on the main body 201 such that the front end of the engaging pin 301 faces a recess provided on the outer peripheral surface near the lower end of the main body 201 and engages with the engaging pin 301. Cover the bottom. By returning the position of the stopper 213 in this state, the tip of the engagement pin 301 is engaged with a recess provided on the outer peripheral surface near the lower end of the main body 201. Thereby, the adapter main body 211 and the main body 201 can be connected and attached to the tip of the tip tool 200.

  Next, a pin 402 provided at the tip of the insulating operation rod 401 is inserted into a substantially 214-shaped groove 214 provided in the adapter main body 211, and the adapter main body 211 is pivoted with respect to the insulating operation rod 401. A twist lock structure is formed by rotating the lens around the center. Thereby, the tip tool 200 can be fixed to the tip of the insulating operation rod 401. Thereby, the main body 201, the adapter main body 211, and the insulating operation rod 401 are integrated (see FIG. 4).

  Next, the nut dropping prevention cap 100 is loaded on the tip tool 200. The nut drop prevention cap 100 is configured so that the flange portion 102 faces the side surface opening 204a from the front of the main body portion 201 in a state where the flange portion 102 faces the upper surface 203 side of the main body portion 201 and is pushed into the cap loading portion 202 in this state. By sliding the nut drop prevention cap 100 in the diameter direction of the main body 201 until it is inside the main body 201, the nut tool 200 can be loaded (see FIG. 4).

  In the cap loading unit 202, the nut drop prevention cap 100 is held in the cap loading unit 202 by friction between the inner surface of the cap loading unit 202 and the outer surface of the cap loading unit 202. Thus, even when the tip tool 200 with the nut drop prevention cap 100 loaded in the cap loading unit 202 is attached to the tip of the insulating operation rod 401, the nut drop prevention cap 100 is dropped from the cap loading unit 202. Can be prevented.

  As described above, since the nut drop prevention cap 100 is formed using rubber, in the tip tool 200, the nut drop prevention cap 100 is used as a cap loading portion by utilizing the frictional force of the nut drop prevention cap 100 itself. It can be prevented from falling off 202. Thereby, it is possible to prevent the nut drop prevention cap 100 from falling off the cap loading section 202 without increasing the number of parts or complicating the structure. The nut drop prevention cap 100 may be loaded on the tip tool 200 before the tip tool 200 is fixed to the tip of the insulating operation rod 401.

  Next, the insulating operation rod 401 is operated so that the upper surface 203 of the tip tool 200 to which the nut drop prevention cap 100 is attached faces the tip of the bolt 501 to be attached (see FIG. 5). In this state, when the insulation operating rod 401 is pushed up toward the bolt 501 and the nut 502 screwed into the bolt 501 (see FIG. 6), the tip of the bolt 501 passes through the upper surface opening 203a of the upper surface 203 of the tip tool 200. Through the through hole 103 of the nut drop prevention cap 100. Thereby, the nut drop prevention cap 100 can be temporarily fixed (temporarily inserted) to the bolt 501 to be attached.

  When the tip of the bolt 501 pierces the through hole 103 of the nut drop prevention cap 100, an operator pushes up the insulating operation rod 401 due to friction generated between the outer peripheral surface of the bolt 501 and the inner peripheral surface of the nut drop prevention cap 100. Response is conveyed. As a result, the nut drop prevention cap 100 can be securely attached to the bolt 501 even when the nut drop prevention cap 100 is attached (temporarily fixed) by an indirect hot wire operation using the insulating operation rod 401.

  The insulating operation rod 401 is pushed up until the upper surface 203 of the tip tool 200 hits the nut 502 fixed to the bolt 501 or until the tip of the bolt 501 inserted into the main body 201 hits the bottom of the cap loading unit 202. It is preferable. Thereby, resistance due to the upper surface 203 of the tip tool 200 hitting the nut 502 fixed to the bolt 501 or resistance due to the tip of the bolt 501 inserted into the main body 201 hitting the bottom of the notch portion. A response is transmitted to the operator who pushes up the insulating operation rod 401, and it can be confirmed that the nut drop prevention cap 100 is securely attached to the bolt 501.

  Next, by operating the insulating operation rod 401, the bolt 501 inserted into the cap loading unit 202 from the upper surface 203 of the main body 201 through the upper surface opening 203a is removed from the front side of the main body 201 through the side surface opening 204a. Pull out (see FIG. 7). Thereby, it is possible to remove only the tip tool 200 from the bolt 501 and the nut drop prevention cap 100 while the nut drop prevention cap 100 is attached to the bolt 501.

  In the cap loading unit 202, the nut drop prevention cap 100 is held in the cap loading unit 202 by friction between the inner surface of the cap loading unit 202 and the outer surface of the cap loading unit 202. When the tip tool 200 is removed from the cap 100, the insulating operation rod 401 is operated against this frictional force. By holding the nut drop prevention cap 100 using friction in the cap loading section 202, the tip tool can be removed from the bolt 501 and the nut drop prevention cap 100 only by operating the insulation operating rod 401 against this frictional force. 200 can be easily removed.

  Thereafter, the insulation operation rod 401 is operated to abut the upper surface 203 of the main body 201 on the lower side of the nut drop prevention cap 100 attached to the bolt 501, and in this state, the insulation operation rod 401 is pushed up toward the bolt 501. (See FIG. 8). As a result, the nut drop prevention cap 100 temporarily fixed to the bolt 501 is further pushed toward the nut 502 to perform the main fixing. As a result, it is possible to more reliably prevent the nut 502 from being loosened by the nut drop prevention cap 100.

  In the first embodiment described above, the nut drop prevention cap 100 is prevented from falling off from the cap loading unit 202 using friction between the inner surface of the cap loading unit 202 and the outer surface of the cap loading unit 202. However, the method for preventing the nut drop prevention cap 100 from falling off is not limited to this.

  FIG. 9 is an explanatory view showing a modification of the tip tool according to the first embodiment of the present invention. As shown in FIG. 9, in the end tool 900, instead of or in addition to the above-described end tool 200 that prevents the nut drop prevention cap 100 from falling off by using friction, for example, the nut in the side opening 204a In order to accept the insertion of the flange portion 102 of the cap 100, a protrusion 901 is provided at a portion that opens with a width corresponding to the outer dimension of the flange portion 102, and the nut detachment that the tip of the protrusion 901 is loaded into the cap loading portion 202 is provided. The nut drop prevention cap 100 may be prevented from falling off by contacting the flange portion 102 of the prevention cap 100.

  Thereby, it is possible to reliably prevent the nut drop prevention cap 100 from falling off regardless of the material forming the nut drop prevention cap 100. Thereby, since the direction of the tip tool 200 and the operation direction of the insulating operation rod 401 are not limited, workability can be improved.

  Further, the tip of the protrusion 901 is brought into contact with the flange of the nut drop prevention cap 100 to prevent the nut drop prevention cap 100 from falling off, so that the inner surface of the cap loading portion 202 and the outer surface of the cap loading portion 202 are made. In addition, when removing the tip tool 200 from the bolt 501 and the nut drop prevention cap 100 than when the nut drop prevention cap 100 is prevented from falling using friction generated between surfaces having a certain area, an operator Can be reduced. Thereby, workability | operativity can be improved.

  Further, instead of or in addition to the above-described method for preventing the nut drop prevention cap 100 from falling off by using friction, for example, the nut drop prevention cap 100 loaded in the cap loading portion 202 is connected to the lower surface side of the main body portion 201. There may be provided a biasing member (not shown) for biasing from the top to the upper surface 203 side. The urging member is not limited to urging from the lower surface side to the upper surface 203 side, but may be urging from the upper surface 203 side to the lower surface side (not shown).

  Thereby, it is possible to reliably prevent the nut drop prevention cap 100 from falling off regardless of the material forming the nut drop prevention cap 100. Thereby, since the direction of the tip tool 200 and the operation direction of the insulating operation rod 401 are not limited, workability can be improved.

  As described above, the tip tool 200 according to the first embodiment of the present invention is the tip tool 200 used for the indirect hot-line operation, and is provided inside the main body 201 and the main body 201, and the flange 102. A cap loading portion 202 that holds the nut drop prevention cap 100 having an annular shape with a side opening 204a that is provided on the side surface 204 of the main body portion 201 and allows the nut drop prevention cap 100 to be inserted into and removed from the cap loading portion 202. And an upper surface opening 203a which is provided on the upper surface 203 of the main body 201 and opens continuously to the side surface opening 204a.

  In the working method using the tip tool 200 according to the embodiment of the present invention, the tip tool 200 is attached to the insulating operation rod 401, the nut loading prevention cap 100 is loaded into the cap loading portion 202 of the tip tool 200, and the nut The tip of the bolt 501 to be attached to the nut drop prevention cap 100 is inserted into the cap loading portion 202 through the upper surface opening 203a of the tip tool 200 loaded with the drop prevention cap 100 and attached to the insulating operation rod 401. The nut drop prevention cap 100 held by the holding portion is fitted into the bolt 501, and the insulation operating rod 401 is operated so that the bolt 501 fitted with the nut drop prevention cap 100 passes through the side opening 204a. It is characterized in that the tool 200 is removed.

  According to the tip tool 200 and the working method of the embodiment according to the present invention, the nut drop prevention cap 100 can be attached without approaching the high-voltage live line (high-voltage charging line). Thereby, the safety | security of the worker who performs the attachment operation | work of the nut drop prevention cap 100 is securable.

  Further, according to the tip tool 200 and the working method according to the embodiment of the present invention, the nut drop prevention cap 100 can be attached without approaching the high-voltage live line (high-voltage charge line). The work of attaching the nut can be made unnecessary, the work efficiency of the work involving the work of attaching the nut drop prevention cap can be improved, and the work time can be shortened.

  Further, according to the tip tool 200 and the working method according to the embodiment of the present invention, the nut drop prevention cap 100 can be attached by a simple operation of simply pressing the tip tool 200 against the bolt 501 and the nut 502. Thereby, the working efficiency can be improved and the working time can be shortened.

  Further, in the tip tool 200 according to the embodiment of the present invention, the holding portion has a biasing member that biases the nut drop prevention cap 100 held by the holding portion from the lower surface side of the main body portion 201 to the upper surface 203 side. You may have. By adopting such a configuration, it is possible to reliably prevent the nut drop prevention cap 100 from dropping without being affected by the material forming the nut drop prevention cap 100. Thereby, since the direction of the tip tool 200 and the operation direction of the insulating operation rod 401 are not limited, workability can be improved.

  In the tip tool 200 according to the embodiment of the present invention, the cap loading unit 202 may include a protrusion 901 that contacts the flange portion 102 of the nut drop prevention cap 100 held by the cap loading unit 202. . By adopting such a configuration, it is possible to reliably prevent the nut drop prevention cap 100 from dropping without being affected by the material forming the nut drop prevention cap 100. Thereby, since the direction of the tip tool 200 and the operation direction of the insulating operation rod 401 are not limited, workability can be improved.

<Embodiment 2>
(Configuration of tip tool 200)
Next, the configuration of the tip tool according to the second embodiment of the present invention will be described. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. FIGS. 10-12 is explanatory drawing which shows the structure of the tip tool of Embodiment 2 concerning this invention. In FIG. 10, the whole view which looked at the front-end tool 200 of Embodiment 2 concerning this invention from the diagonal direction is shown. In FIG. 11, the AA cross section in FIG. 10 is shown.

  10 to 12, a tip tool 1000 according to a second embodiment of the present invention includes a main body 1001 having a cylindrical shape. The main body 1001 includes a columnar cavity 1002 that realizes the cap loading unit 202 on the inner peripheral side. The inner diameter of the cavity 1002 that realizes the holding portion according to the present invention is equal to the outer diameter of the flange portion 102 in the nut drop prevention cap 100 or larger than the outer diameter of the flange portion 102 in the nut drop prevention cap 100.

  The cap loading unit 202 includes a movable bottom plate 1003 that can move in the cavity 1002 along the axial direction of the main body 1001, and a biasing member 1004 that is provided below the main body 1001 relative to the movable bottom plate 1003. It is equipped with. The urging member 1004 causes the urging force to urge the movable bottom plate 1003 from the lower side to the upper side of the main body 1001. The urging member 1004 can be realized by a compression coil spring, for example.

  The movable bottom plate 1003 moves from the upper side to the lower side against the urging force of the urging member 1004 when an urging force from the upper side to the lower side of the main body 1001 is applied. Specifically, when the nut drop prevention cap 100 is loaded in the cap loading section 202, the movable bottom plate 1003 moves downward by the axial dimension of the nut drop prevention cap 100. The movable bottom plate 1003 moves from the upper side to the lower side according to the number of nut drop prevention caps 100 loaded in the cap loading unit 202. Accordingly, a plurality of nut drop prevention caps 100 can be loaded into the cavity 1002 that is the cap loading unit 202.

  The cap loading unit 202 always urges the nut drop prevention cap 100 from the lower side to the upper side by the urging force of the urging member 1004. Thereby, even if the tip tool 1000 is carried in a state where a plurality of nut drop prevention caps 100 are loaded in the cap loading part 202, the nut drop prevention cap 100 does not fall off from the cap loading part 202. As described above, the tip tool 1000 according to the second embodiment of the present invention can be used for attaching the nut drop prevention cap 100 and also for transporting and storing the nut drop prevention cap 100.

(How to use the tip tool 1000)
Next, a method of using the tip tool 1000 according to the second embodiment of the present invention will be described. The tip tool 1000 according to the second embodiment of the present invention uses the adapter main body 211 connected to the main body 1001 attached to the tip of the insulating operation bar 401 in the same manner as the above-described tip tool 1000. The tip tool 1000 can be loaded with a plurality of nut drop prevention caps 100 in advance.

  In the same manner as described above, the nut drop prevention cap 100 is temporarily fixed to the tip of the bolt 501 to which the nut 502 is screwed. At this time, since the main body portion 1001 includes the cavity 1002, by urging the insulating operation rod 401 to the nut 502 side, the nut 502 is screwed and the bolt 501 penetrating through the through hole 103 of the nut drop prevention cap 100. Can be guided into the cavity 1002.

  Regardless of the screwing position of the nut 502 to the bolt 501 and the length from the screwing position of the nut 502 to the bolt 501 to the tip of the bolt 501, the nut drop prevention cap 100 is securely attached to the bolt 501 (temporarily fixed). can do. That is, even when the length from the screwing position of the nut 502 to the bolt 501 to the tip of the bolt 501 is long, the nut drop prevention cap 100 is pushed in until the nut drop prevention cap 100 contacts the nut 502. Therefore, the nut drop prevention cap 100 can be securely attached to the bolt 501 and the nut 502 can be reliably prevented from falling.

  After the nut drop prevention cap 100 is temporarily fixed to the tip of the bolt 501, when the bolt 501 is pulled out from the front side of the main body 1001 through the side opening 204a, the nut drop prevention cap 100 temporarily fixed to the bolt 501 is removed. , One is pulled out from the cap loading unit 202. As a result, the movable bottom plate 1003 moves from the lower side to the upper side by the amount of the nut drop prevention cap 1001 by the biasing force of the biasing member, and the nut drop prevention cap 100 housed second from the top moves to the top. .

  Thereafter, the insulation operation rod 401 is operated to abut the upper surface 203 of the main body portion 1001 on the lower side of the nut drop prevention cap 100 attached to the bolt 501, and in this state, the insulation operation rod 401 is pushed up toward the bolt 501. . Thereby, the nut drop prevention cap 100 temporarily fixed to the bolt 501 is further pushed toward the nut 502. As a result, it is possible to more reliably prevent the nut 502 from being loosened by the nut drop prevention cap 100.

  As described above, in the tip tool 1000 according to the second embodiment of the present invention, the main body portion 1001 has a substantially cylindrical shape, and the holding portion extends along the facing direction between the upper surface 203 and the lower surface of the main body portion 1001. A movable bottom plate 1003 that is movable, and a biasing member 1004 that biases the movable bottom plate 1003 from the lower surface side to the upper surface 203 side. The nut drop prevention cap 100 is attached to the biasing member 1004 via the movable bottom plate 1003. It is characterized in that it is held by being pressed against the upper surface 203.

  According to the tip tool 1000 according to the second embodiment of the present invention, in addition to the various effects exhibited by the tip tool 200 in the first embodiment described above, the nut drop-off prevention cap is attached when the nut drop-off prevention cap 100 is attached. It is not necessary to load the tip tool 1000 with the nut drop prevention cap 100 every time 100 is attached to the bolt 501, and for example, the nut drop prevention cap 100 can be attached continuously to the adjacent bolts 501. Thereby, the working efficiency can be improved and the working time can be shortened.

  Further, according to the tip tool 1000 of the second embodiment of the present invention, the plurality of nut drop prevention caps 100 can be easily transported and stored. This can also improve the working efficiency and shorten the working time.

  As described above, the tip tool and the working method according to the present invention are useful for the tip tool and the working method used for indirect hot-wire work, and in particular, a nut drop prevention cap for preventing the nut screwed into the bolt from dropping. It is suitable for a tip tool and a working method used for indirect hot wire work for attaching a bolt to the bolt.

DESCRIPTION OF SYMBOLS 100 Nut drop prevention cap 101 Fixing part 102 Flange part 200 Tip tool 201 Main body part 202 Cap loading part 203 Upper surface 203a Upper surface opening 204 Side surface (front surface)
204a Side opening 210 Adapter for connection 211 Adapter main body 212 Tubular member 213 Stopper 301 Engagement pin 302 Pulling coil spring 401 Insulating operation rod 501 Bolt 502 Nut 1000 Tip tool 1001 Main body 1002 Cavity 1003 Movable bottom plate 1004 Energizing member

Claims (5)

A tip tool used for indirect hot-wire work,
The main body,
A holding portion that is provided inside the main body portion and holds a cap having a ring shape with a flange portion;
A side opening that is provided on a side surface of the main body and allows the cap to be inserted into and removed from the holding unit;
An upper surface opening provided on the upper surface of the main body and continuously opening to the side surface opening;
A tip tool characterized by comprising:   The tip tool according to claim 1, wherein the holding portion includes a biasing member that biases the cap held by the holding portion from the lower surface side to the upper surface side of the main body portion. The main body has a substantially cylindrical shape,
The holding portion includes a movable bottom plate that is movable along a direction in which the upper surface and the lower surface of the main body portion are opposed to each other, and a biasing member that biases the movable bottom plate from the lower surface side to the upper surface side. The tip tool according to claim 1, wherein the tip tool is held by being pressed against the upper surface by the urging member through the movable bottom plate.   The tip tool according to claim 1, wherein the holding portion includes a protrusion that comes into contact with a flange portion of a cap held by the holding portion. A main body part, a holding part for holding an annular cap provided with a flange part provided inside the main body part, and an insertion / extraction of the cap with respect to the holding part provided on a side surface of the main body part A working method using a tip tool including a side opening and an upper surface opening provided on the upper surface of the main body portion and continuously opening to the side opening,
Attaching the tip tool to an insulating operating rod;
Loading the cap into the holding portion of the tip tool;
The tip of a bolt to be attached to the cap is inserted into the holding portion through the upper surface opening of a tip tool that is loaded with the cap and attached to the insulating operation rod, and the cap held by the holding portion is used as the bolt. Fitting process;
Removing the tip tool from the bolt by operating the insulation operating rod so that the bolt fitted with the cap passes through the side opening;
The working method characterized by including.

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