JP6536225B2 - Indirect live line construction cotter - Google Patents

Description

  The present invention relates to a cotter for indirect hot-line construction. In particular, it is an indirect hot wire construction cotter suitable for indirect hot wire construction which carries out electrical work in an uninterrupted state using an insulating operating rod, and which can be attached to a clevis type support of a tension resistant insulator or the like. It relates to the structure of the construction cotter.

  In the case of erecting an overhead distribution line on a utility pole, it is known that there are two types of pole method, so-called lead-through pole and retaining pole. Generally, in the lead-in installation column, the overhead distribution line is in contact with the groove portion of the insulator fixed to the arm metal supported by the utility pole, and the binding wire is wound around the insulator and the overhead distribution line to make the overhead distribution line into the utility pole. I support it. On the other hand, the fixed installation pole supports the overhead distribution line on the utility pole by attaching a tension-resistant insulator connected to a retention clamp that holds the overhead distribution line on an arm supported on the utility pole.

  FIG. 15 is a front view showing an example of a mounting pole by a fastening mounting pole. Referring to FIG. 15, the metal pole A is fixed to the top of the utility pole P in a horizontal state. On both sides of the arm metal A, a pair of tension resistant insulators 7 and 7 is disposed. A pair of tension-resistant insulators 7 and 7 are swingably connected to each other. One of the tension-resistant insulators 7 is connected to the arm metal A via a pair of torsion straps St and St. The other tensile insulator 7 pivotally connects the holding clamp Ci.

  Referring to FIG. 15, the retention clamp Ci is covered with an insulating cover. The holding clamp Ci holds an overhead power distribution line (hereinafter referred to as an electric wire) W therein. As described above, the retaining column supports the wire W on the utility pole P by attaching the tension-resistant insulator 7 connected to the retaining clamp Ci that holds the wire W on the arm metal A supporting the pole P. A wire W is installed between the pair of retention clamps Ci and Ci without requiring tension. The part of the electric wire W which bypasses the utility pole P is called, for example, an edge line We.

  FIG. 16 is a partial enlarged view of FIG. 15 with the insulating cover removed from the retention clamp. FIG. 17 is a partial enlarged view of FIG. 16, FIG. 17 (A) is a front view of a retention clamp, and FIG. 17 (B) is a view on arrow A of FIG. 17 (A).

  FIG. 18 is a view showing the structure of a tension-resistant insulator, and FIG. 18 (A) is a front view of the tension-resistant insulator partially shown in cross section, and FIG. 18 (B) is a right side of the tension-resistant insulator. It is a front view. FIG. 19 is a perspective view showing the configuration of a cotter according to the prior art. FIG. 20 is a view showing the structure of a self-locking split pin according to the prior art, and FIG. 20 (A) is a front view of the self-locking split pin, and FIG. 20 (B) is FIG. It is AA arrow sectional drawing of.

  Referring to FIG. 18, the strain-resistant insulator 7 includes a cylindrical main body 70 formed of porcelain. In addition, the tension-resistant insulator 7 is provided with a double support clevis-type first support portion 71 and a single support clevis-type second support member 72. The first support portion 71 protrudes to one end side of the main body 70. The second support portion 72 protrudes to the other end side of the main body 70. The first support portion 71 penetrates the first through hole 71 h at an end. The second support portion 72 penetrates the second through hole 72 h at its end.

  Referring to FIG. 16 or 18, the first through hole 71h and the second through hole 72h are made to coincide with each other, and a cylindrical cotter 7c is inserted, whereby a pair of tension-resistant insulators 7 with the cotter 7c at the center is provided.・ 7 can be connected to each other freely pivotably.

  Further, referring to FIG. 16 or FIG. 18, the set of the opening provided at the end of the twisting strap St and the first through hole 71h are made to coincide with each other, and the cotter 7c is inserted. The torsion straps St · St and one tension resistant insulator 7 can be swingably connected.

  Referring to FIG. 16 or 18, the opening provided at the end of the retention clamp Ci is aligned with the second through hole 72h, and the cotter 7c is inserted, thereby centering the cotter 7c on the other side of the tension-resistant forceps 7 and the holding clamp Ci can be pivotably connected.

  Referring to FIG. 17, the retention clamp Ci is composed of a clamp body C1, a triangular wedge C2 and a clamp C3. The clamp body C1 is slidably coupled to the wedge body C2. Further, the clamp body C1 has an annular portion Ca that can be swingably connected to the tension-resistant insulator 7 at one end, and has a receiving portion Cb at the other end. The end of the wedge body C2 is pushed into the receiving portion Cb together with the peeling portion Wi in which the coating of the electric wire W is partially peeled.

  Referring to FIG. 17, an arc-shaped groove for receiving the outer periphery of the peeling portion Wi is formed on the slope of the wedge body C2. Then, the wedge body C2 and the pressing metal fitting C3 are fastened by a bolt, and the peeled portion Wi of the electric wire W is clamped (clamped).

  Referring to FIG. 19, the cotter 7c according to the prior art is configured of a cylindrical shaft portion 71c and a collar portion 72c. The shaft portion 71c opens a hole 7ch on the opposite side to the flange portion 72c. After the pair of tensile forceps 7 and 7 are connected by the cotter 7c (see FIG. 16), the cotter 7c can be prevented from falling off by inserting the split pin 71p into the hole 7ch. Furthermore, after the split pin 71p is inserted into the hole 7ch, the tip of the split pin 71p can be expanded to prevent the split pin 71p from falling off.

  The split pin 71p shown in FIG. 19 is a brass split pin called a pine leaf shape. The brass split pin 71p is easy to deform at its tip. On the other hand, the split pin 72p shown in FIG. 20 is a stainless steel split pin called self-locking type. Referring to FIG. 19, when the split pin 72p is forcibly inserted into the hole 7ch of the cotter 7c, the tip of the split pin 72p elastically returns, and the split pin 72p can be locked to the cotter 7c. The self-locking split pin 72p is excellent in operability.

  Referring to FIG. 16 or FIG. 17, power distribution work such as connecting the tension resistant insulator 7 with the cotter 7 c or pulling out the cotter 7 c from the tension resistant insulator 7 is generally performed in an uninterrupted state. It is known that there are two ways of so-called "live line construction" in which power distribution work is carried out in an uninterrupted state: direct live line construction method and indirect active line construction method.

  The direct live wire construction method using insulating gloves etc. is excellent in workability, but for the hot wire construction handling high voltage electric wires, from the viewpoint of securing the safety of workers, the indirect live wire construction method using a long insulating operation rod Is moving to

  Referring to FIG. 15, when replacing the tension-resistant insulator 7, as shown in FIG. 16, it is necessary to pull the electric wire W to the arm metal A side to release the load on the cotter 7c. In order to draw such a wire, a tension wire for indirect hot wire construction called a strain rod is used.

  FIG. 21 is a front view showing a configuration according to an example of a wire tensioner for drawing an electric wire. FIG. 22 is a front view showing the usage state of the wire tensioner. Referring to FIG. 21 or 22, the wire stretcher 8 is composed of a cylindrical main body 81 having a cavity inside and a telescopic rod 82. The telescopic rod 82 is movably connected to the main body 81 in the axial direction.

  Referring to FIG. 21 or 22, main body 81 has a feed screw (not shown) disposed therein. On the other hand, the telescopic rod 82 has a nut member (not shown) screwed with the feed screw disposed therein.

  Further, referring to FIG. 21 or 22, the main body 81 is provided with a cylindrical joint fitting 83 at one end side. The joint fitting 83 can be connected to the tip of a common operating rod (not shown) for indirect hot wire construction. When the tip of the common operating rod is connected to the joint bracket 83 and the common operating rod is rotated about its axis, the rotational movement of the joint bracket 83 is performed via the gear device (not shown) disposed inside the main body 81. It can be transmitted to the feed screw. The telescopic rod 82 can be moved in the axial direction with respect to the main body 81.

  Referring to FIG. 21 or 22, the main body 81 connects a gripper 84 called a camlar to one end. The gripper 84 is composed of a plurality of link members. The wire W can be introduced to the gripper 84 from the outer peripheral direction. When the operation lever 841 provided on the lower end side of the gripper 84 is pulled, the gripper 84 can grip the electric wire W from the outer peripheral direction (see FIG. 22).

  Referring to FIG. 21 or 22, the main body 81 is provided with the wire support portion 85 at the middle portion. The wire support portion 85 is opened in a U-shape. As shown in FIG. 22, the wire support portion 85 can introduce the wire W from above. By closing the opening of the wire support portion 85 with an open / close member (not shown) provided above the wire support portion 85, the wire support portion 85 can freely support the wire W.

  Referring to FIG. 21 or 22, the telescopic rod 82 connects the hook member 86 to the other end. The hook member 86 is provided with a ring member 86r. The ring member 86r can be gripped by an insulating operating rod (so-called insulating jack) having a pair of open / close arms at its tip. The hook member 86 can be moved upward using the insulating operating rod (not shown).

  Next, with reference to FIG. 22, a method of using the wire insulator 8 will be described. In the example of the pole shown in FIG. 22, the edge line We is supported by the pin forceps 7p, which is different from FIGS. 15 and 16, but the other configuration is the same.

  First, referring to FIG. 22, the hook member 86 is anchored to an annular rope R disposed adjacent to the twisting strap St. Then, the hook member 86 is protected by a protective sheet Ps in a state where the wire harness 8 is hanging down with the hook member 86 at the head. This is to prevent the hook member 86 from contacting the charging unit and causing a ground fault. Similarly, the edge line We and the retention clamp Ci are protected by a protective sheet Ps so that their charged parts are not exposed.

  Next, referring to FIG. 22, a common operating rod (not shown) is connected to the joint metal fitting 83, and the common operating rod is operated to lift one end side of the wire tensioner 8 toward the electric wire W. Next, after the wire W is introduced into the inside of the wire support portion 85, the gripper 84 is attached to the wire W. Next, when the common operating rod is rotated in one direction about its axis, the telescopic rod 82 can be moved toward the main body 81, and the electric wire W can be relatively drawn toward the arm metal A. Then, as shown in FIG. 16, the load on the cotter 7c can be released.

  After the above preparation is completed, the split pin 71p is pulled out from the cotter 7c (see FIG. 19) using an insulating operation rod in which a radio pliers-like adapter (not shown) is connected to the pair of open / close arms.

  Next, referring to FIG. 18 (B) or FIG. 19, the cotter 7c is hit from the opposite side of the collar portion 72c with a tie stick hammer (not shown) to project the collar portion 72c. In this case, a tie-stick hammer (not shown) is connected to the tip of the common operating rod. Next, the cotter 7c is pulled out of the strain-resistant insulator 7 using a pliers-like adapter (not shown). After these series of constructions, the tension resistant insulator 7 can be replaced.

  However, the prior art cotter or the prior art split pin is gripped with the insulating operation rod, and the operation of attaching the cotter to the tension-resistant insulator or the task of removing the split pin from the cotter is not easy. In particular, when attaching or detaching the cotter to the tension-resistant insulator, there is a problem that the split pin can be easily dropped.

  In order to solve the above-mentioned problem, it is difficult to drop the split pin, and a cotter in which attachment and detachment of the cotter is easy by the indirect hot wire construction method is disclosed (for example, see Patent Document 1).

Japanese Utility Model 7-49057

  FIG. 23 is a perspective view showing the configuration of a cotter body provided in a cotter for indirect hot-line construction according to the prior art, and a part of which is shown in cross section. FIG. 24 is a perspective view showing the configuration of a core member provided in a cotter for indirect hot-line construction according to the prior art. FIG. 25 is a perspective view showing the configuration of a plate spring member provided in a cotter for indirect hot-wire construction according to the prior art.

  FIG. 26 is a perspective view showing the configuration of a cotter for indirect hot wire construction according to the prior art, and shows a part in cross section. FIG. 27 is a longitudinal sectional view showing the configuration of a cotter for indirect hot-line construction according to the prior art.

  FIG. 28 is a longitudinal cross-sectional view showing the configuration of a cotter for indirect hot wire construction according to the prior art, and is a state diagram in which a core member is pushed into the cotter main body. FIG. 29 is a perspective view showing an example of use of a cotter for indirect hot wire construction according to the prior art.

  Note that FIGS. 23 to 27 of the present application correspond to FIGS. 1 to 5 of Patent Document 1. Also, FIGS. 28 and 29 of the present application correspond to FIGS. 6 and 7 of Patent Document 1, respectively.

  Referring to FIGS. 23 to 27, a cotter (hereinafter referred to as a cotter) 6 for indirect hot wire construction according to the prior art has a cylindrical cotter body 61 with a hollow inside, a cylindrical core member 62, and a cylindrical core member 62. , And a plate spring member 63 for preventing detachment.

  Referring to FIG. 23 or FIG. 26 and FIG. 27, the cotter main body 61 is composed of a cylindrical portion 61a and a collar portion 61b. The cylindrical portion 61a opens the pair of rectangular windows 61w and 61w in opposite directions. The flange portion 61b has an inner diameter and an outer diameter that are larger than the inner diameter and the outer diameter of the cylindrical portion 61a.

  Referring to FIG. 24 or FIG. 26 and FIG. 27, the core member 62 includes a flat plate-like protrusion 62a, a cylindrical shaft 62b, and a disk-like head 62c. The protrusion 62a can engage a connecting portion 63a of a plate spring member 63 described later with the tip end portion 621 (see FIG. 25). The shaft portion 62b can be slidably moved inside the cylindrical portion 61a. The outer diameter of the head portion 62c is larger than the outer diameter of the shaft portion 62b. Further, the outer diameter of the head portion 62c is smaller than the inner diameter of the collar portion 61b.

  Referring to FIGS. 25 to 27, the plate spring member 63 is formed of a metal plate having a spring property. And the leaf | plate spring member 63 has the connection part 63a formed in C shape, and a pair of protrusion part 63b * 63b which faces to the opposite direction (refer FIG. 25). The pair of projecting portions 63b and 63b form an inclined surface 631 which is inclined upward so as to open from the connecting portion 63a. Further, the pair of projecting portions 63b, 63b have extending portions 632 extending from their crests so as to face each other.

  Referring to FIG. 29, for example, in the case of connecting a pair of torsion straps St · St coupled to arm metal A and the tension-resistant insulator 7, first, an opening provided at an end of the torsion strap St and 1 Make the through holes 71h coincide with each other (see FIG. 18), and insert the cotter body 61.

  Next, referring to FIG. 27, with the plate spring member 63 attached to the tip end of the core member 62, with the plate spring member 63 at the top, the core member 62 is on the flange portion 61b side of the cotter body 61. Insert from Then, the crests of the pair of protrusions 63b and 63b slide the inner wall of the cotter body 61, and when the protrusions 63b reach the windows 61w, the pair of protrusions 63b and 63b protrude from the windows 61w and 61w ( See FIG. 25 or 27). Thereby, the cotter 6 can be held off.

  On the other hand, when the cotter 6 is pulled out from the state shown in FIG. 27, the core member 62 is further pushed into the back side of the cotter main body 61 from the state shown in FIG. The cotter 6 according to Patent Document 1 is configured such that the inclined surface 631 of the protrusion 63 b slides on the edge of the window 61 w and the crests of the pair of protrusions 63 b and 63 b retract from the outer wall of the cotter body 61. Can be pulled out.

  With reference to FIGS. 23 to 27, the cotter 6 according to Patent Document 1 has an advantage in that there is no concern of dropping the plate spring member 63 corresponding to the split pin when it is attached to and detached from the tension-resistant insulator. However, the cotter 6 according to Patent Document 1 has a problem that it is not easy to operate the core member 62 using the tip tool for indirect hot wire construction.

  There is a need for a cotter which can hold the cotter without using a split pin and which is easy to operate using a tip tool for indirect hot wire construction. And, the above can be said to be the problem of the present invention.

  The present invention has been made in view of such problems, and it is possible to prevent the cotter from coming off without using a split pin, and an indirect operation that is easy to operate using a tip tool for indirect hot wire construction. The purpose is to provide a cotter for hot-line construction.

  The inventor operates the flange portion of the cotter main body with the insulating Yatsuko, moves the piston member held inside the cotter main body, and puts the pair of open / close members standing up on the outer periphery of the cotter main body The cotter pin can be inserted into and removed from the connection hole opened in the support shaft of the cotter so that the piston member can be restored and the pair of open / close members can be erected by releasing the insulating jack from the flange of the cotter body. Considering that the above problems can be solved, based on this, the inventors have arrived at the invention of the following new indirect hot-line construction cotter.

  (1) The cotter according to the present invention for indirect hot-line construction comprises a pair of hook-like bifurcated arms in which one first gripping arm is bifurcated, and the other first gripping arm is between the pair of bifurcated arms A cotter for indirect hot-wire construction that can be attached to and detached from at least a tension resistant ladder using a long first insulated operating rod having a pair of open / close first grip arms consisting of a bendable single arm and having a pair of open / close first grip arms. A cylindrical cotter body having a cylindrical shaft part and a first flange part formed at one end of the shaft part and having a hollow inside; and the inside of the first cotter body And a rod-shaped first piston member slidably held, wherein the first cotter body is rotatably coupled to the tip end side of the shaft portion so as to stand upright from the outer periphery of the shaft portion. Biasing force to rotate in the direction in which the opening and closing members and the opening and closing members stand. A spring for urging the forces to move in a direction away from each other, the pair of operation buttons connected to the first collar portion and the pair of operation buttons so as to advance and retract toward the center of the first cotter body A distal end edge of the first piston member that abuts on the proximal ends of the pair of the opening / closing members to maintain the opening / closing members in an upright state; and a side opposite to the leading edge Formed in the first collar portion, and the pair of first gripping arms grip the pair of operation buttons in a direction in which the pair of operation buttons come closer to each other. In the moved state, the distal end edge of the operation button slides with the conical portion to move the first piston member toward the proximal end portion of the opening / closing member so as to be embedded from the outer periphery of the shaft portion The pair of the opening and closing members are lowered.

  (2) It is preferable that the first cotter body internally include a compression coil spring for urging the first piston member to move the first piston member in a direction to move away from the pair of the opening / closing members.

  (3) The first cotter main body slidably holds the first piston member, prevents the first piston member from falling off, and is internally provided with a retainer that defines the stop position of the first piston member. Is preferred.

  (4) It is preferable that the first cotter main body has a slit groove which is cut away from the tip end edge and rotatably accommodates the pair of the opening and closing members.

  (5) The cotter according to the present invention for indirect hot wire construction uses a long second insulating operation rod having a pair of open and close second grip arms at its tip, and at least the indirect live wire detachably attachable to a tension insulator. A cotter for construction, which has a cylindrical shaft and a second flange formed at one end of the shaft, and has a hollow cylindrical second cotter main body, and the second cotter main body. A second rod member slidably held inside the second cotter body, and the second cotter body is rotatably connected to the tip end side of the shaft portion so as to be able to rise from the outer periphery of the shaft portion; An opening and closing member for preventing the removal, a C-shaped spring for urging a force to rotate in a direction in which the opening and closing members rise, and a notch in the second flange portion beyond the center of the second cotter body At least one of the second gripping arms has a notch groove which can be inserted The second piston member is in contact with the proximal end portions of the pair of the opening and closing members, and is formed on a tip edge opposite to the tip edge to maintain the opening and closing members standing up, and the notch The outer wall of the second gripping arm slides with the curved surface portion in a state where at least one of the second gripping arms is inserted into the notch groove, the curved surface portion protruding in the groove; (2) The piston member is moved toward the proximal end of the opening and closing member, and the pair of the opening and closing members are put in a state of being embedded from the outer periphery of the shaft.

  (6) It is preferable that the second cotter body internally include a compression coil spring for urging the second piston member to move the second piston member in a direction to move away from the pair of the opening / closing members.

  (7) The second cotter main body slidably holds the second piston member, prevents the second piston member from falling off, and has a retainer internally defining the stop position of the second piston member. Is preferred.

  (8) It is preferable that the second cotter main body has a slit groove which is cut away from the tip end edge and rotatably accommodates the pair of the opening and closing members.

  When the cotter for indirect hot-line construction according to the present invention is provided with a pair of opening / closing members for preventing falling off rotatably connected to the tip end side of the shaft of the cotter body when operating the collar part side of the cotter body with an insulating jack In conjunction with the operation of the internal piston member, the pair of opening and closing members can be pinched, and can be easily attached to and detached from at least the tension resistant insulator.

It is a figure which shows the structure of the cotter for indirect hot-line works by 1st Embodiment of this invention, FIG. 1 (A) is a top view of the cotter for indirect hot-line works, FIG. 1 (B) is FIG. 1 (C) is a left side view of FIG. 1 (A), and FIG. 1 (D) is a longitudinal sectional view of FIG. 1 (A). It is a perspective view which shows the structure of the cotter for indirect hot-line works by 1st Embodiment. It is a perspective exploded view showing the composition of the cotter for indirect hot-line construction by a 1st embodiment. It is a figure which shows the state which a pair of opening-and-closing member with which the cotter for indirect hot-line works by 1st Embodiment is equipped has closed, FIG. 4: (A) is a top view of the cotter for indirect hot-line works, FIG. 4 (A) is a right side view, FIG. 4 (C) is a left side view of FIG. 4 (A), and FIG. 4 (D) is a longitudinal cross-sectional view of FIG. 4 (A). It is a figure which shows the usage example of the cotter for indirect hot-line works by 1st Embodiment, and FIG. 5 (A) is the 1st support of the double mountain clevis form using the cotter for indirect hot-line works according to 1st Embodiment. 5 (B) is a front view of FIG. 5 (A). FIG. 5 (B) is a plan view showing a state in which the unit and the second support of clevis type are connected. It is a figure which shows the structure by an example of the 1st insulated operating rod which concerns on 1st Embodiment of this invention, FIG. 6 (A) is a front view of a 1st insulated operating rod, FIG. 6 (B) is a 1st insulated It is a right side view of a control stick. It is the front view which expanded the principal part of FIG. 6 (A). It is a figure which shows the structure of the cotter for indirect hot-line works by 2nd Embodiment of this invention, FIG. 8 (A) is a top view of the cotter for indirect hot-line works, FIG. 8 (B) is FIG. 8 (C) is a left side view of FIG. 8 (A), and FIG. 8 (D) is a longitudinal cross-sectional view of FIG. 8 (A). It is a perspective view which shows the structure of the cotter for indirect hot-line works by 2nd Embodiment. It is a perspective exploded view showing the composition of the cotter for indirect hot-line construction by a 2nd embodiment. It is a figure which shows the state which a pair of opening-and-closing member with which the cotter for indirect hot-line works by 2nd Embodiment is equipped has closed, FIG. 11: (A) is a top view of the cotter for indirect hot-line works, FIG. 11 (A), FIG. 11 (C) is a left side view of FIG. 11 (A), and FIG. 11 (D) is a longitudinal sectional view of FIG. 11 (A). It is a front view which shows the structure by an example of the 2nd insulated operating rod which concerns on 2nd Embodiment of this invention. It is the front view which expanded the principal part of FIG. It is a left view of FIG. It is a front view which shows an example of the mounting pole by a securing mounting pole. It is the elements on larger scale of FIG. 15, and is a state figure which removed the insulation cover from the retention clamp. FIG. 17 (A) is a front view of a retention clamp, and FIG. 17 (B) is a view on arrow A of FIG. 17 (A). FIG. 18A is a front view of the tension-resistant insulator partially shown in cross section, and FIG. 18B is a right side view of the tension-resistant insulator. It is a perspective view which shows the structure of the cotter by a prior art. FIG. 20 (A) is a front view of the self-locking split pin, and FIG. 20 (B) is an AA view of FIG. 20 (A). It is arrow sectional drawing. It is a front view which shows the structure by an example of the wire stretcher for drawing an electric wire. It is a front view which shows the use condition of a wire drawing apparatus. It is a perspective view which shows the structure of the cotter body with which the cotter for the indirect hot wire construction by a prior art is equipped, and shows a part in a cross section. It is a perspective view which shows the structure of the core member with which the cotter for indirect hot wire construction by a prior art is equipped. It is a perspective view which shows the structure of the leaf | plate spring member with which the cotter for indirect hot wire construction by a prior art is equipped. BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the structure of the cotter for indirect hot-line works by a prior art, and shows a part in a cross section. It is a longitudinal cross-sectional view which shows the structure of the cotter for indirect hot-line construction by a prior art. It is a longitudinal cross-sectional view which shows the structure of the cotter for indirect hot-line works by a prior art, and is the state figure which stuffed the core member inside with respect to the cotter main body. It is a perspective view which shows the example of use of the cotter for indirect hot-line construction by a prior art.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First Embodiment
(Composition of cotter for indirect live line construction)
First, the configuration of the cotter for indirect hot-line construction according to the first embodiment of the present invention will be described.

  FIG. 1 is a view showing the configuration of the cotter for indirect hot-line work according to the first embodiment of the present invention, and FIG. 1 (A) is a plan view of the cotter for indirect hot-line work, and FIG. 1 (A) is a right side view, FIG. 1 (C) is a left side view of FIG. 1 (A), and FIG. 1 (D) is a longitudinal cross-sectional view of FIG. 1 (A).

  FIG. 2 is a perspective view showing the configuration of the cotter for indirect hot-line construction according to the first embodiment. FIG. 3 is an exploded perspective view showing the configuration of the cotter for indirect hot wire construction according to the first embodiment.

  FIG. 4 is a view showing a state in which the pair of open / close members provided in the indirect hot wire construction cotter according to the first embodiment is closed. FIG. 4 (A) is a plan view of the indirect hot wire construction cotter, FIG. (B) is a right side view of FIG. 4 (A), FIG. 4 (C) is a left side view of FIG. 4 (A), and FIG. 4 (D) is a longitudinal sectional view of FIG. 4 (A) .

  FIG. 5 is a view showing an example of use of the cotter for indirect hot-line construction according to the first embodiment, and FIG. 5 (A) is a double mountain clevis type using the cotter for indirect hot-line construction according to the first embodiment. 5 (B) is a front view of FIG. 5 (A). FIG. 5 (B) is a plan view showing a state in which the first support portion of FIG.

(Configuration of the first insulated operating rod)
Next, prior to describing the configuration of the cotter for indirect hot wire construction according to the first embodiment, the configuration of the first insulating operation rod for operating the cotter for indirect live wire construction according to the first embodiment will be described.

  FIG. 6 is a view showing a configuration according to an example of the first insulating operating rod according to the first embodiment of the present invention, and FIG. 6 (A) is a front view of the first insulating operating rod, and FIG. FIG. 7 is a right side view of the first insulating operation rod. FIG. 7 is an enlarged front view of the main part of FIG.

  Referring to FIG. 6, the first insulated operating rod 9 for indirect hot wire construction is constituted by a long operating rod 91 and a gripping tool 92. Further, the first insulating operating rod 9 is provided with an operating rod 93. The gripping tool 92 is attached to the tip of the operating rod 91 (see FIG. 7).

  Referring to FIG. 6 or FIG. 7, the gripping tool 92 is composed of a pair of curved first gripping arms 9a and 9b that open and close. And one 1st grasping arm 9a is a fixed arm to which a base end was fixed, and the other 1st grasping arm 9b is rotation axis 9c provided in the base end of one 1st grasping arm 9a. It is a movable arm that rotates around the

  Referring to FIG. 6, the operating rod 93 is held along the operating rod 91. The tip of the actuating bar 93 is rotatably connected to the other first gripping arm 9b. And if the control lever 94 provided in the base end part of the operation | movement stick | rod 93 is operated, with respect to one 1st holding | grip arm 9a, the other 1st holding | grip arm 9b can be opened and closed. In the first insulating operating rod 9, the middle portion of the operating rod 91 and the operating rod 93 is formed of a plastic pipe or the like having an insulating property, and the insulating property is secured so as to be suitable for the indirect active wire construction method.

  Referring to FIG. 6, when the operating lever 94 is grasped and the operating lever 94 is brought close to the operating rod 91, the other first gripping arm 9b can be closed with respect to one of the first gripping arms 9a. When the operating lever 94 is released, the force of a spring (not shown) connected to the operating lever 94 can open the other first gripping arm 9b with respect to the one first gripping arm 9a.

  Referring to FIG. 6 or 7, one first gripping arm 9a is formed so as to be bent like a hook. The other first gripping arm 9 b is formed to be curved in an arc shape. One first gripping arm 9a is a pair of bifurcated bifurcated arms. The other first gripping arm 9 b is a single arm introduced between a pair of branch arms. As a result, when the pair of first gripping arms 9a and 9b are closed, the tips of the first gripping arms 9a and 9b cross each other, and a gripping object having a substantially circular cross section can be reliably gripped.

  The first insulating operating rod 9 shown in FIG. 6 or FIG. 7 is so-called “quick-type yatko” because it specializes only in quickly grasping an object to be grasped having a substantially circular cross section.

(overall structure)
Next, the entire configuration of the cotter for indirect hot-line construction according to the first embodiment of the present invention will be described. Referring to FIGS. 1 to 4, the cotter for indirect hot-line construction (hereinafter abbreviated as cotter) 10 according to the first embodiment of the present invention has a hollow cylindrical first cotter body 1 and a rod-like first cotter body 1. 1 piston member 3 is provided. The first cotter body 1 has a cylindrical shaft 11 and a first flange 12 formed at one end of the shaft 11. The first piston member 3 is slidably held inside the first cotter body 1.

  Referring to FIGS. 1 to 4, the first cotter body 1 is provided with a pair of retaining members 1 a and 1 a and a C-shaped spring 1 b. Further, the first cotter body 1 includes a pair of operation buttons 1c and 1c and compression coil springs 1d and 1d serving as a pair of biasing members.

  Referring to FIGS. 1 to 4, the pair of opening and closing members 1 a and 1 a are rotatably connected to the tip end side of the shaft portion 11 so as to be able to rise from the outer periphery of the shaft portion 11. The C-shaped spring 1 b urges a rotating force in the direction in which the pair of opening and closing members 1 a and 1 a are erected.

  Referring to FIGS. 1 to 4, the pair of operation buttons 1 c and 1 c are connected to the first brim 12 so as to be movable toward and away from the center of the first cotter body 1. The pair of compression coil springs 1d, 1d urges a force that moves the pair of operation buttons 1c, 1c away from each other.

  Referring to FIGS. 1 or 3 and 4, the first piston member 3 has a tip edge 31 and a conical portion 32. The distal end edge 31 of the first piston member 3 abuts on the base end portions of the pair of opening and closing members 1a and 1a, and the state in which the pair of opening and closing members 1a and 1a stand can be maintained (see FIG. 1D). The conical portion 32 is formed on the opposite side to the tip edge 31. And the cone part 32 protrudes inside the 1st collar part 12 (refer FIG.1 (D)).

  When the pair of first gripping arms 9a and 9b grip the pair of operation buttons 1c and 1c from the state shown in FIG. 1 or 2 with reference to FIG. 6 or FIG. 7, the pair of operation buttons 1c and 1c They can move in directions approaching each other (see FIG. 4D).

  The tip edge of the operation button 1c slides with the conical portion 32 when the pair of operation buttons 1c and 1c are moved in the direction approaching each other from the state shown in FIG. 1 or 2 (see FIG. 4D). Thus, the first piston member 3 can be moved toward the proximal end of the opening and closing member 1a. Thus, the pair of opening / closing members 1a and 1a can be put in a state of being buried from the outer periphery of the shaft portion 11 (see FIG. 4).

  With reference to FIGS. 1 to 4, the cotter 10 according to the first embodiment includes a pair of opening / closing members 1 a and 1 a for removal prevention that is rotationally coupled to the tip end side of the shaft portion 11 of the first cotter body 1 with difficulty. When the first flange 12 side of the first cotter body 1 is operated with the first insulating operating rod 9 (see FIG. 6 or FIG. 7), the pair of open / close members 1a ·· is interlocked with the operation of the internal piston member. 1a can be made female and can be easily attached and detached to and from the strain resistant insulator 7 (see FIG. 5).

(Configuration of the first cotter body)
Next, the configuration of the first cotter body 1 according to the first embodiment will be described. With reference to FIG. 1 or FIG. 3 and FIG. 4, the first cotter body 1 internally includes a compression coil spring 12 s. The first cotter body 1 further includes a retainer 13 therein. On the other hand, the first piston member 3 forms a flange portion 3f having an outer diameter larger than that of the shaft portion 3s in an intermediate portion.

  Referring to FIG. 1 or 4, the compression coil spring 12 s covers the shaft portion 3 s of the first piston member 3. The compression coil spring 12 s is disposed between the collar 3 f and the stop wall of the first cotter body 1.

  In the state shown in FIG. 1, the compression coil spring 12 s biases the first piston member 3 to move the first piston member 3 in the direction away from the pair of opening / closing members 1 a and 1 a. In the state shown in FIG. 1, since the collar 3 f is in contact with the retainer 13, it is difficult to move the first piston member 3 to the left with respect to the first cotter body 1.

  Referring to FIG. 4, when the pair of operation buttons 1c is moved toward each other, the first piston member 3 is moved toward the proximal end of the opening / closing member 1a against the biasing force of the compression coil spring 12s. It can move. And a pair of opening-and-closing members 1a and 1a can be carried out. On the other hand, when the pair of operation buttons 1c is released, the first piston member 3 can be returned to the initial state by the biasing force of the compression coil spring 12s (see FIG. 1). And a pair of opening-and-closing members 1a and 1a can be stood up (refer to Drawing 1).

(Structure of retainer)
Next, the configuration of the retainer 13 according to the first embodiment will be described. Referring to FIG. 1 or FIGS. 3 and 4, the retainer 13 opens the fitting hole 13 h. The shaft portion 3s of the first piston member 3 is slidably held in the fitting hole 13h. Further, the retainer 13 has a male screw portion 13s formed on the outer periphery. The male screw portion 13 s can be screwed into a female screw portion formed inside the first cotter body 1. Further, the retainer 13 has a plurality of negative grooves 13d formed on its front surface for rotating the same (see FIG. 3).

  Referring to FIG. 3, the retainer 13 can be inserted from a hole 12 h opened in the first collar 12. The retainer 13 can be fixed inside the first cotter body 1. In the state shown in FIG. 1, the retainer 13 prevents the first piston member 3 from falling off. Further, in the state shown in FIG. 1, the retainer 13 defines the stop position of the first piston member 3. In addition, the hole 12 h of the first collar 12 is normally closed by the cover plate 14 (see FIGS. 1 to 4).

(Configuration of shaft)
Next, the configuration of the shaft portion 11 according to the first embodiment will be described. Referring to FIGS. 1 to 4, the shaft portion 11 has a slit groove 11 s cut away at a predetermined depth from its tip end edge. The slit groove 11s can accommodate a part or all of the pair of opening and closing members 1a and 1a. Further, the shaft portion 11 opens a pair of press-fit holes 11 h penetrating the slit groove 11 s. The pivot pin 11p can be press-fit into the press-fit hole 11h (see FIG. 3).

  On the other hand, referring to FIG. 3, in the opening / closing member 1a, a support hole 11a into which the pivot pin 11p is inserted is opened on the base end side. The opening and closing member 1a can rotate around the rotation pin 11p. The pair of opening and closing members 1a and 1a can be rotatably accommodated in the slit groove 11s.

(Configuration of C-shaped spring)
Next, the configuration of the C-shaped spring 1b according to the first embodiment will be described. Referring to FIGS. 1 to 4, C-shaped spring 1b is formed of a steel wire or the like having a spring property. Referring to FIG. 3, the C-shaped spring 1 b has a bending portion 11 b and a pair of end portions 12 b and 12 b. The curved portion 11 b is curved in a C-shape. The pair of end portions 12b and 12b is bent at both ends of the bending portion 11b.

  Referring to FIG. 3, one end 12b can be locked in a locking hole 12a opened at the proximal end of one opening and closing member 1a. The other end 12b can be locked in the locking hole 12a opened at the proximal end of the other opening / closing member 1a.

  Referring to FIG. 1, the C-shaped spring 1b biases the force that the first piston member 3 moves to the left through the opening and closing members 1a and 1a. However, in the state shown in FIG. 1, since the collar 3f is in contact with the retainer 13, it is difficult to move the first piston member 3 to the left. That is, the C-shaped spring 1b maintains a state in which the pair of open / close members 1a and 1a are erected.

  Referring to FIG. 4, when the first piston member 3 is moved to the right against the biasing force of the C-shaped spring 1b, the pair of opening and closing members 1a and 1a can be inlaid. When the first piston member 3 is moved to the left, the biasing force of the C-shaped spring 1b can return to the state in which the pair of open / close members 1a and 1a are erected (see FIG. 1 or 2).

(Configuration of operation button)
Next, the configuration of the operation button 1c according to the first embodiment will be described. Referring to FIGS. 1 to 4, the operation button 1 c includes an axial portion 11 c and a collar portion 12 c. The shaft portion 11c is slidably coupled to the oilless metal 12m provided to the first collar portion 12 (see FIG. 3).

  Further, referring to FIG. 3, the shaft portion 11 c forms an annular groove 13 c. An E-ring 1e can be fitted in the annular groove 13c. By fitting the E-ring 1e to the annular groove 13c, it is possible to prevent the operation button 1c from falling off and to define the stop position of the operation button 1c (see FIG. 1).

  When the pair of first gripping arms 9a and 9b grips the pair of collars 12c and 12c from the state shown in FIG. 1 or 2, referring to FIG. 6 or 7, the pair of shaft portions 11c and 11c are They can move in directions approaching each other (see FIG. 4D).

  When the pair of shaft parts 11c and 11c are moved in the direction approaching each other from the state shown in FIG. 1 or FIG. 2 (see FIG. 4D), the tip edge of the shaft part 11c slides with the conical part 32 Thus, the first piston member 3 can be moved toward the proximal end of the opening and closing member 1a. As a result, the pair of opening and closing members 1a and 1a can be pinched in a state of being buried from the outer periphery of the shaft portion 11 (see FIG. 4).

(Action of cotter for indirect live line construction)
Next, the operation and effects of the cotter 10 will be described while describing an example of use of the cotter 10 according to the first embodiment. Referring to FIG. 5, the first through holes 71h provided in the first support portion 71 and the second through holes 72h provided in the second support portion 72 are made to coincide with each other, and a pair is provided with reference to FIG. With the first gripping arms 9a and 9b gripping the pair of operation buttons 1c and 1c (see FIG. 4), with the shaft portion 11 at the top, the shaft portion 11 of the first cotter body 1 is the first through hole 71h And the second through hole 72h. Then, the pair of tension-resistant insulators 7 can be pivotably connected to each other around the first cotter body 1 (see FIG. 16).

  Referring to FIG. 5, after the pair of tension-proof forceps 7 and 7 are connected by the first cotter body 1, when the pair of operation buttons 1c and 1c are released from the pair of first gripping arms 9a and 9b, the pair of open and close The members 1a and 1a can be erected, and the cotter 10 can be prevented from falling off. As in the prior art, the cotter 10 according to the first embodiment can prevent the cotter from being removed without using a split pin, and uses a tip tool for indirect hot wire construction (see FIG. 6 or 7). Operation is easy.

Second Embodiment
(Composition of cotter for indirect live line construction)
Next, the configuration of the cotter for indirect hot-line construction according to the second embodiment of the present invention will be described.

  FIG. 8 is a view showing the structure of the cotter for indirect hot-line work according to the second embodiment of the present invention, and FIG. 8 (A) is a plan view of the cotter for indirect hot-line work, and FIG. 8 (A) is a right side view, FIG. 8 (C) is a left side view of FIG. 8 (A), and FIG. 8 (D) is a longitudinal sectional view of FIG. 8 (A).

  FIG. 9 is a perspective view showing the configuration of the cotter for indirect hot-line construction according to the second embodiment. FIG. 10 is an exploded perspective view showing the configuration of the cotter for indirect hot-line construction according to the second embodiment.

  FIG. 11 is a view showing a state in which a pair of open / close members provided in the cotter for indirect hot wire construction according to the second embodiment is closed, and FIG. 11 (A) is a plan view of the cotter for indirect hot wire construction; 11 (B) is a right side view of FIG. 11 (A), FIG. 11 (C) is a left side view of FIG. 11 (A), and FIG. 11 (D) is a longitudinal sectional view of FIG. .

  In addition, since the component which has a code | symbol same as the code | symbol used in 1st Embodiment makes the effect | action the same, below, description may be abbreviate | omitted.

(Configuration of the second insulated operating rod)
Next, prior to describing the configuration of the cotter for indirect hot wire construction according to the second embodiment, the configuration of a second insulating operation rod for operating the cotter for indirect live wire construction according to the second embodiment will be described.

  FIG. 12 is a front view showing a configuration according to an example of a second insulating operation rod according to a second embodiment of the present invention. FIG. 13 is an enlarged front view of the main part of FIG. FIG. 14 is a left side view of FIG.

  Referring to FIGS. 12 to 14, the second insulating operating rod 5 is configured of a long operating rod 51 and a gripping tool 52. Further, the second insulating operating rod 5 is provided with an operating rod 53. The gripping tool 52 is attached to the tip of the operating rod 51.

  Referring to FIG. 12 or 13, the gripping tool 52 is constituted by a pair of curved second gripping arms 5a and 5b that open and close. And one 2nd holding arm 5a is a fixed arm to which a base end was fixed, and the other 2nd holding arm 5b is rotation axis 5c provided in the base end of one 2nd holding arm 5a. It is a movable arm that rotates around the

  Referring to FIG. 12, the operating rod 53 is held along the operating rod 51. The tip of the actuating bar 53 is rotatably connected to the other second gripping arm 5b. And if the control lever 54 provided in the base end part of the action | operation stick | rod 53 is operated, with respect to one 2nd holding arm 5a, the other 2nd holding arm 5b can be opened and closed. In the second insulating operating rod 5, the intermediate portion between the operating rod 51 and the operating rod 53 is formed of a plastic pipe or the like having an insulating property, and the insulating property is secured so as to be suitable for the indirect active wire construction method.

  Referring to FIG. 12, when the operating lever 54 is grasped to move the operating lever 54 closer to the operating rod 51, the other second gripping arm 5b can be closed with respect to one second gripping arm 5a. When the operating lever 54 is released, the force of a spring (not shown) connected to the operating lever 54 can open the other second gripping arm 5b with respect to the one second gripping arm 5a. FIG. 12 or 13 shows a state in which the other second gripping arm 5b is maximally opened with respect to one second gripping arm 5a.

  Referring to FIG. 13 or 14, one second gripping arm 5a projects a tapered gripping claw 51a. The gripping claws 51a form a gripping surface 50a. The gripping surface 50a is formed substantially in parallel along the centrifugal direction from the rotation center of the rotation shaft 5c. Similarly, the other second gripping arm 5b projects a tapered gripping claw 51b. The gripping claws 51b form a gripping surface 50b. The gripping surface 50b is disposed at a predetermined opening angle with the gripping surface 50a. Referring to FIG. 12 or 13, gripping the operation lever 54 allows the gripping surface 50 b to approach the gripping surface 50 a.

  The second insulated control rod 5 shown in FIGS. 12 to 14 is a so-called "insulated jack" capable of gripping a high voltage distribution line or the like disposed at a high place with a pair of gripping claws 51a and 51b.

(overall structure)
Next, the entire configuration of the cotter for indirect hot-line construction according to the second embodiment of the present invention will be described. Referring to FIGS. 8 to 11, the cotter (hereinafter referred to as cotter) 20 according to the second embodiment of the present invention has a hollow cylindrical second cotter body 2 and a rod-like second cotter body 2. A two-piston member 4 is provided. The second cotter body 2 has a cylindrical shaft 21 and a second flange 22 formed at one end of the shaft 21. The second piston member 4 is slidably held inside the second cotter body 2.

  Referring to FIGS. 8 to 11, the second cotter body 2 is provided with a pair of retaining members 1a and 1a and a C-shaped spring 1b. Further, the second cotter body 2 has a notch groove 22d.

  Referring to FIGS. 8 to 11, the pair of opening and closing members 1 a and 1 a are rotatably connected to the tip end side of the shaft 21 so as to be able to rise from the outer periphery of the shaft 21. The C-shaped spring 1 b urges a rotating force in the direction in which the pair of opening and closing members 1 a and 1 a are erected.

  Referring to FIGS. 8 to 11, the notch groove 22 d is cut out in the second flange 22 beyond the center of the second cotter body 2. Referring to FIG. 11A or 11D, the second gripping arm 5a can be inserted into the notch groove 22d (see FIGS. 12 to 14). Further, although not shown in FIG. 11, the second gripping arm 5b can be inserted into the notch groove 22d (see FIGS. 12 to 14).

  Referring to FIG. 8 or FIG. 10 and FIG. 11, the second piston member 4 has a tip edge 41 and a semispherical curved portion 42. The tip end edge 41 of the second piston member 4 abuts on the base end portions of the pair of opening and closing members 1a and 1a, and the state where the pair of opening and closing members 1a and 1a stand can be maintained (see FIG. 8D). The curved surface portion 42 is formed on the opposite side to the tip end edge 41. And the curved surface part 42 protrudes in the notch groove 22d of the 2nd collar part 22 (refer FIG. 8 (D)).

  Referring to FIGS. 12 to 14 from the state shown in FIG. 8 or FIG. 9, when the second gripping arm 5a is inserted into the notch groove 22d, the outer wall of the second gripping arm 5a slides with the curved surface portion 42. Thus, the second piston member 4 can be moved toward the proximal end of the opening and closing member 1a. Thus, the pair of opening / closing members 1a and 1a can be put in a state of being buried from the outer periphery of the shaft portion 21 (see FIG. 11).

  With reference to FIGS. 8 to 11, the cotter 20 according to the second embodiment includes a pair of opening / closing members 1a and 1a for removal prevention rotatably connected to the tip end side of the shaft 21 of the second cotter body 2 so as to fall off. When the second gripping arm 5a is inserted into the notch groove 22d provided in the flange portion 22 of the second cotter body 2 (see FIG. 11), the pair of opening and closing members 1a is interlocked with the operation of the internal piston member. 1a can be made female and can be easily attached and detached to and from the strain resistant insulator 7 (see FIG. 5).

(Configuration of the second cotter body)
Next, the configuration of the second cotter body 2 according to the second embodiment will be described. Referring to FIG. 8 or FIG. 10 and FIG. 11, the second cotter body 2 internally includes a compression coil spring 12s. Further, the second cotter body 2 is provided with a retainer 13 inside. On the other hand, the second piston member 4 forms a flange portion 4f having an outer diameter larger than that of the shaft portion 4s in an intermediate portion.

  Referring to FIG. 8 or 11, the compression coil spring 12 s covers the shaft portion 4 s of the second piston member 4. The compression coil spring 12 s is disposed between the flange 4 f and the stop wall of the second cotter body 2.

  In the state shown in FIG. 8, the compression coil spring 12 s biases the second piston member 4 to move the second piston member 4 in a direction to move away from the pair of opening and closing members 1 a and 1 a. In the state shown in FIG. 8, since the collar 4 f is in contact with the retainer 13, it is difficult to move the second piston member 4 to the left with respect to the second cotter body 2.

  Referring to FIG. 11, when the second gripping arm 5a is inserted into the notch groove 22d, the second piston member 4 is moved toward the proximal end of the opening / closing member 1a against the biasing force of the compression coil spring 12s. it can. And a pair of opening-and-closing members 1a and 1a can be carried out. On the other hand, when the second gripping arm 5a is removed from the notch groove 22d, the second piston member 4 can be returned to the initial state by the biasing force of the compression coil spring 12s (see FIG. 8). And a pair of opening-and-closing members 1a and 1a can be stood up (refer to Drawing 8).

(Structure of retainer)
Next, the configuration of the retainer 13 according to the second embodiment will be described. Referring to FIG. 8 or FIG. 10 and FIG. 11, the retainer 13 opens the fitting hole 13h. The shaft portion 4s of the second piston member 4 is slidably held in the fitting hole 13h. Further, the retainer 13 has a male screw portion 13s formed on the outer periphery. The male screw portion 13 s can be screwed into a female screw portion formed inside the second cotter body 2. Further, the retainer 13 has a plurality of negative grooves 13d formed on its front surface for rotating it (see FIG. 10).

  Referring to FIG. 10, the retainer 13 can be inserted from the hole 22 h opened in the second flange 22. The retainer 13 can then be fixed inside the second cotter body 2. In the state shown in FIG. 8, the retainer 13 prevents the second piston member 4 from falling off. Further, in the state shown in FIG. 8, the retainer 13 defines the stop position of the second piston member 4.

(Configuration of shaft)
Next, the configuration of the shaft portion 21 according to the second embodiment will be described. Referring to FIGS. 8 to 11, the shaft portion 21 has a slit groove 21s which is cut away at a predetermined depth from the tip end edge thereof. The slit groove 21s can accommodate a part or all of the pair of opening and closing members 1a and 1a. The shaft portion 21 opens a pair of press-fit holes 21 h penetrating the slit groove 21 s. The pivot pin 11p can be press-fit into the press-fit hole 21h (see FIG. 10).

  On the other hand, referring to FIG. 10, in the opening / closing member 1a, a support hole 11a into which the pivot pin 11p is inserted is opened on the base end side. The opening and closing member 1a can rotate around the rotation pin 11p. Then, the pair of open / close members 1a and 1a can be rotatably accommodated in the slit groove 21s.

(Configuration of C-shaped spring)
Next, the configuration of the C-shaped spring 1b according to the second embodiment will be described. Referring to FIG. 8, the C-shaped spring 1 b biases the second piston member 4 to move to the left through the opening and closing members 1 a and 1 a. However, in the state shown in FIG. 8, since the collar 4 f is in contact with the retainer 13, it is difficult to move the second piston member 4 to the left. That is, the C-shaped spring 1b maintains a state in which the pair of open / close members 1a and 1a are erected.

  Referring to FIG. 11, when the second piston member 4 is moved to the right against the biasing force of the C-shaped spring 1b, the pair of opening and closing members 1a and 1a can be inlaid. When the second piston member 4 is moved to the left, the biasing force of the C-shaped spring 1b can return the pair of open / close members 1a and 1a to the upright state (see FIG. 8 or 9).

(Action of cotter for indirect live line construction)
Next, the operation and effects of the cotter 20 will be described while describing an example of use of the cotter 20 according to the second embodiment. Referring to FIG. 5, the first through hole 71h provided in the first support portion 71 and the second through hole 72h provided in the second support portion 72 are made to coincide with each other, and cutting is performed with reference to FIGS. After the second gripping arm 5a is inserted into the notch groove 22d (see FIG. 11), the second gripping arm 5b can be actuated to grip the hook 22 with the pair of second gripping arms 5a and 5b. Next, with the shaft portion 21 at the top, the shaft portion 21 of the second cotter body 2 can be inserted into the first through hole 71 h and the second through hole 72 h. Then, the pair of tension-resistant insulators 7 can be pivotably connected to each other around the second cotter body 2 (see FIG. 16).

  Referring to FIG. 5, after connecting the pair of tension-resistant insulators 7 and 7 with the second cotter body 2, the second gripping arm 5a can be pulled out of the notch groove 22d, whereby the pair of opening and closing members 1a and 1a can be erected. And the cotter 20 can be prevented from falling off. As in the prior art, the cotter 10 according to the second embodiment can prevent the cotter from being removed without using a split pin, and uses a tip tool for indirect hot wire construction (see FIGS. 12 to 14). Operation is easy.

The cotter for indirect hot-line construction according to the present invention can be expected to have the following effects.
(1) It is possible to easily replace the tension-proof ladder by indirect hot-line work.
(2) There is no need to operate a small split pin.
(3) There is no need to worry about dropping the split pin.
(4) The cotter can be gripped securely with quick or insulating jaws.

1 first cotter body 1a, 1a pair of opening / closing members 1b C-shaped spring 1c, 1c pair of operation buttons 1d, 1d pair of compression coil springs (biasing member)
Reference Signs List 3 first piston member 7 tension-resistant insulator 9 first insulated operating rod 9a, 9b pair of first gripping arms 10 cotter (cotter for indirect hot wire construction)
11 shaft portion 12 first ridge portion 31 tip edge 32 conical portion

Claims (8)

A pair of opening and closing, wherein one first gripping arm comprises a pair of bifurcated bifurcated branch arms and the other first gripping arm comprises a curved single arm which can be introduced between the pair of bifurcated arms It is a cotter for indirect hot-line construction that can be attached to and detached from at least a tension-resistant insulator by using a long first insulating operation rod having a first gripping arm at the tip end thereof.
A cylindrical first cotter body having a cylindrical shaft portion and a first flange portion formed at one end of the shaft portion and having a hollow inside;
And a rod-like first piston member slidably held inside the first cotter body,
The first cotter body is
A pair of opening / closing members for preventing slippage rotatably connected to the tip end side of the shaft portion so as to be able to stand upright from the outer periphery of the shaft portion;
A C-shaped spring that biases a rotating force in a direction in which the opening and closing members rise;
A pair of operation buttons connected to the first buttocks freely advancing and retreating toward the center of the first cotter body;
And a biasing member for biasing the pair of operation buttons to move away from each other.
The first piston member is
A distal end edge which abuts on the proximal end of the pair of the opening and closing members and maintains the opening and closing members in the upright state;
And a conical portion formed on the opposite side of the tip edge and projecting to the inside of the first collar portion;
In a state where the pair of first gripping arms grip the pair of operation buttons and the pair of operation buttons move in the direction in which they approach each other, the distal end edge of the operation button slides with the conical portion, A cotter for indirect hot wire construction, wherein the first piston member is moved toward the proximal end of the opening and closing member, and the pair of opening and closing members are laid down so as to be embedded from the outer periphery of the shaft.   2. The indirectly active living body according to claim 1, wherein the first cotter body internally includes a compression coil spring for urging the first piston member to move the first piston member away from the pair of opening / closing members. Line construction cotter.   The first cotter main body slidably holds the first piston member, prevents the falling off of the first piston member, and is internally provided with a retainer that defines the stop position of the first piston member. Cotter for indirect live line construction according to 1 or 2.   The cotter according to any one of claims 1 to 3, wherein the first cotter body has a slit groove which is cut away from the tip end edge and rotatably accommodates the pair of the opening and closing members. A cotter for indirect hot-line construction that is detachable at least on a tension-resistant insulator, using a long second insulating operating rod having a pair of openable second gripping arms at its tip.
A cylindrical cotter body having a cylindrical shaft portion and a second flange portion formed at one end of the shaft portion and having a hollow inside;
A rod-like second piston member slidably held inside the second cotter body;
The second cotter body is
A pair of opening / closing members for preventing slippage rotatably connected to the tip end side of the shaft portion so as to be able to stand upright from the outer periphery of the shaft portion;
A C-shaped spring that biases a rotating force in a direction in which the opening and closing members rise;
And a notch groove which is cut in the second collar portion beyond the center of the second cotter body and in which at least one of the second gripping arms is insertable;
The second piston member is
A distal end edge which abuts on the proximal end of the pair of the opening and closing members and maintains the opening and closing members in the upright state;
A curved surface portion formed on the side opposite to the tip end edge and protruding into the notch groove,
In a state in which at least one of the second gripping arms is inserted into the notch groove, the outer wall of the second gripping arm slides with the curved surface portion, thereby making the second piston member a proximal end of the opening / closing member An indirect hot wire construction cotter in which a pair of the opening and closing members are put in a state of being moved toward and buried from the outer periphery of the shaft portion.   6. The indirectly active living body according to claim 5, wherein the second cotter body internally includes a compression coil spring for urging the second piston member to move the second piston member in a direction moving away from the pair of the opening / closing members. Line construction cotter.   The second cotter body slidably holds the second piston member, prevents the falling off of the second piston member, and is internally provided with a retainer that defines the stop position of the second piston member. Cotter for indirect live line construction according to 5 or 6.   The cotter according to any one of claims 5 to 7, wherein the second cotter main body has a slit groove which is cut away from the tip end edge and rotatably accommodates the pair of the opening and closing members.

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