JP2018117420A - Cotter for indirect hot wire construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy-operable cotter for indirect hot wire construction.SOLUTION: A cotter 10 can couple one strain insulator 7 and the other strain insulator 7 in a freely oscillatable manner. The cotter 10 comprises a cylindrical cotter main body 1, a piston member 2, and a "lever" crank mechanism 3. The cotter main body 1 has a first shaft part 1s and a first flange part 1f. The piston member 2 has a second shaft part 2s held inside the cotter main body 1 and a second flange part 2f disposed so as to face the first flange part 1f. The "lever" crank mechanism 3 has a pair of opening/closing link plates 3a, 3b which can protrude and retract from the outer circumference of the first shaft part 1s, and a pair of auxiliary link plates 3c, 3d rotationally linked with the opening/closing link plates 3a, 3b. When the piston member 2 is moved with a pair of insertion plates 93, 93 being inserted between the first flange part 1f and the second flange part 2f, the pair of opening/closing link plates 3a, 3b are closed into a state where the pair of opening/closing link plates 3a, 3b are buried from the outer circumference of the first shaft part 1s.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a cotter for indirect hot wire construction. In particular, it is an indirect hot wire cotter suitable for indirect hot wire work that uses an insulating operation rod to carry out electrical work in an uninterrupted state, and can be attached to a clevis-type support part of a tension insulator. It relates to the construction of construction cotters.

  In the case of installing an overhead distribution line on a utility pole, it is known that there are two so-called so-called pulling columns and retaining columns. Generally, an overhead distribution line comes into contact with a groove portion of an insulator fixed to an arm supported by a power pole, and a binding wire is wound around the insulator and the overhead distribution line so that the overhead distribution line is used as a power pole. I support it. On the other hand, the retaining column supports the overhead distribution line on the utility pole by attaching a tension insulator coupled to a retention clamp that sandwiches the overhead distribution line to a brace supported on the utility pole.

  FIG. 6 is a front view showing an example of a pillar with a retaining pillar. Referring to FIG. 6, a brace A is fixed to the upper portion of the utility pole P in a horizontal state. A pair of tension insulators 7 and 7 are arranged on both sides of the arm metal A. The pair of tension insulators 7 and 7 are connected to each other so as to be swingable. One tension insulator 7 is connected to the arm metal A via a pair of torsion straps St and St. The other tension insulator 7 connects the retaining clamp Ci so as to be swingable.

  Referring to FIG. 6, the retaining clamp Ci is covered with an insulating cover. The retention clamp Ci holds an aerial distribution line (hereinafter referred to as an electric wire) W inside thereof. As described above, the tensioning pillar supports the electric wire W on the electric pole P by attaching the tension insulator 7 connected to the retaining clamp Ci that sandwiches the electric wire W to the arm metal A supported on the electric pole P. An electric wire W is installed between the pair of tension clamps Ci and Ci without requiring tension. A portion of the electric wire W that bypasses the utility pole P is called, for example, an edge line We.

  FIG. 7 is a partially enlarged view of FIG. 6, and is a state diagram in which the insulating cover is removed from the retention clamp. 8 is a partially enlarged view of FIG. 7, FIG. 8 (A) is a front view of the retaining clamp, and FIG. 8 (B) is a view as seen from the arrow B in FIG. 8 (A).

  FIG. 9 is a diagram showing the structure of the tension insulator. FIG. 9A is a front view of the tension insulator partially shown in cross section, and FIG. 9B is a right side of the tension insulator. FIG. FIG. 10 is a perspective view showing a configuration of a cotter according to the prior art. 11A and 11B are diagrams showing the configuration of a self-locking split pin according to the prior art, FIG. 11A is a front view of the self-locking split pin, and FIG. 11B is FIG. 11A. It is AA arrow sectional drawing.

  Referring to FIG. 9, the tension insulator 7 includes a cylindrical main body 70 made of porcelain. The tension insulator 7 includes a double clevis-type first support portion 71 and a single clevis-type second support portion 72. The first support portion 71 protrudes toward one end portion of the main body 70. The second support part 72 protrudes to the other end part side of the main body 70. The 1st support part 71 has penetrated the 1st penetration hole 71h to the end. The 2nd support part 72 has penetrated 72h of 2nd through holes to the edge part.

  Referring to FIG. 7 or FIG. 9, a pair of tension insulators 7 centered on the cotter 7c by inserting the cylindrical cotter 7c with the first through hole 71h and the second through hole 72h aligned. -7 can be pivotably connected to each other.

  Further, referring to FIG. 7 or FIG. 9, a set of the cotter 7c is set as a center by inserting the cotter 7c with the opening provided at the end of the torsion strap St aligned with the first through hole 71h. The torsion strap St · St and one tension insulator 7 can be swingably connected.

  Referring to FIG. 7 or FIG. 9, by inserting the cotter 7c with the opening provided at the end of the retaining clamp Ci aligned with the second through hole 72h, the other tension insulator around the cotter 7c is inserted. 7 and the tension clamp Ci can be pivotably coupled.

  Referring to FIG. 8, the retaining clamp Ci is composed of a clamp body C1, a triangular wedge body C2, and a presser fitting C3. The clamp body C1 is slidably connected to the wedge body C2. The clamp body C1 has an annular portion Ca that can be slidably connected to the tension insulator 7 at one end, and 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 from which the coating of the electric wire W is partially peeled.

  Referring to FIG. 8, an arc-shaped groove that receives the outer periphery of the peeling portion Wi is formed on the slope of the wedge body C2. The wedge body C2 and the presser fitting C3 are fastened with bolts to clamp (clamp) the peeling portion Wi of the electric wire W.

  Referring to FIG. 10, the cotter 7c according to the prior art includes a cylindrical shaft portion 71c and a flange portion 72c. The shaft portion 71c has a hole 7ch on the side opposite to the flange portion 72c. After connecting the pair of tension insulators 7 and 7 with the cotter 7c (see FIG. 7), the cotter 7c can be prevented from falling off by inserting the split pin 71p into the hole 7ch. Further, after the split pin 71p is inserted into the hole 7ch, the tip of the split pin 71p is expanded to prevent the split pin 71p from falling off.

  The split pin 71p shown in FIG. 10 is a brass split pin called a pine needle shape. The split pin 71p made of brass can be easily deformed at the tip. On the other hand, the split pin 72p shown in FIG. 11 is a stainless steel split pin called a self-locking type. Referring to FIG. 10, when the split pin 72p is forcibly inserted into the hole 7ch of the cotter 7c, the tip of the split pin 72p is elastically restored, and the split pin 72p can be locked to the cotter 7c. The self-locking split pin 72p is excellent in operability.

  With reference to FIG. 7 or FIG. 8, power distribution work such as connecting the tension insulator 7 with the cotter 7 c or pulling the cotter 7 c from the tension insulator 7 is generally performed in an uninterruptible state. It is known that there are two types of so-called hot line construction, which is power distribution work in an uninterruptible state, a direct hot wire method and an indirect hot wire method.

  The direct hot-wire method using insulating gloves is excellent in workability, but the indirect hot-wire method using a long insulated operation rod is used for hot-wire work that handles high-voltage wires from the viewpoint of ensuring the safety of workers. Has moved to.

  Referring to FIG. 6, when exchanging the tension insulator 7, it is necessary to release the load on the cotter 7 c by pulling the electric wire W toward the arm metal A as shown in FIG. 7. In order to draw such wires, a wire rod for indirect hot wire construction called a strain rod is used.

  FIG. 12 is a front view showing a configuration of an example of a wire drawing device for drawing electric wires. FIG. 13 is a front view showing a usage state of the wire tensioner. Referring to FIG. 12 or FIG. 13, the wire tensioner 8 includes a cylindrical main body 81 and a telescopic rod 82 having a cavity inside. The telescopic rod 82 is connected to the main body 81 so as to be movable in the axial direction.

  With reference to FIG. 12 or FIG. 13, the 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.

  12 or 13, the main body 81 includes a cylindrical joint fitting 83 on one end side. The joint fitting 83 can be connected to the tip of a common operation rod (not shown) for indirect hot line construction. When the tip of the common operation rod and the joint fitting 83 are connected and the common operation rod is rotated about its axis, the joint fitting 83 is rotated through a 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. 12 or FIG. 13, the main body 81 has a gripper 84 called a camler connected to one end. The gripper 84 is composed of a plurality of link members. The electric wire W can be introduced into 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. 13).

  Referring to FIG. 12 or FIG. 13, the main body 81 has a wire support portion 85 in the middle portion. The electric wire support portion 85 is opened in a U shape. As shown in FIG. 13, the electric wire support part 85 can introduce the electric wire W from an upper part. By closing the opening of the wire support portion 85 with an opening / closing member (not shown) provided on the upper portion of the wire support portion 85, the wire support portion 85 can freely support the wire W.

  Referring to FIG. 12 or FIG. 13, 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 operation rod (so-called insulating yatco) having a pair of opening and closing arms at the tip. The hook member 86 can be moved upward using the insulating operation rod (not shown).

  Next, with reference to FIG. 13, the usage method of the wire feeder 8 is demonstrated. In the example of the mounting column shown in FIG. 13, the edge line We is different from that of FIGS. 6 and 7 in that the edge line We is supported by the pin insulator 7p, but the other configurations are the same.

  First, referring to FIG. 13, the hook member 86 is anchored to the annular rope R disposed adjacent to the torsion strap St. Then, the hook member 86 side is protected by the protective sheet Ps with the hook member 86 at the head and the wire tensioner 8 hanging down. This is to prevent the hook member 86 from coming into contact with the charging unit and causing a ground fault. Similarly, the edge line We and the retaining clamp Ci are protected by the protective sheet Ps so that those charged parts are not exposed.

  Next, referring to FIG. 13, a common operation rod (not shown) is connected to the joint fitting 83, and the common operation rod is operated to lift one end of the wire tensioner 8 toward the electric wire W. Next, after the electric wire W is introduced into the electric wire support portion 85, the gripper 84 is attached to the electric wire W. Next, when the common operation rod is rotated in one direction around its axis, the telescopic rod 82 can be moved toward the main body 81, and the electric wire W can be relatively pulled toward the arm metal A. Then, as shown in FIG. 7, 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 by using an insulating operation rod in which a radio pliers adapter (not shown) is connected to a pair of opening and closing arms (see FIG. 10).

  Next, referring to FIG. 9B or FIG. 10, 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 operation rod. Next, the cotter 7c is pulled out from the tension insulator 7 using a radio pliers-like adapter (not shown). Through these series of constructions, the tension insulator 7 can be replaced.

  Referring to FIG. 9, an adapter for indirect hot-wire construction is disclosed in which the cotter 7c can be easily released when the cotter 7c is pulled out from the tension insulator 7 after the split pin 71p is pulled out from the cotter 7c (for example, , See Patent Document 1).

  Next, prior to describing the configuration of the adapter for indirect hot-wire work according to Patent Document 1, the structure of an insulating operation rod for operating the adapter for indirect hot-wire work will be described.

  FIG. 14 is a front view showing a configuration of an example of an insulating operation rod according to the prior art. FIG. 15 is an enlarged front view of the main part of FIG. 16 is a left side view of FIG.

  Referring to FIGS. 14 to 16, the insulating operation bar 5 is composed of a long operation bar 51 and a gripping tool 52. Further, the insulating operation bar 5 includes an operation bar 53. The gripping tool 52 is attached to the tip of the operation bar 51.

  Referring to FIG. 14 or FIG. 15, the gripping tool 52 is composed of a pair of curved gripping arms 5a and 5b that open and close. One gripping arm 5a is a fixed arm with a base end fixed, and the other gripping arm 5b rotates around a rotation shaft 5c provided at the base end of one gripping arm 5a. It is a movable arm.

  Referring to FIG. 14, the operation bar 53 is held along the operation bar 51. The distal end portion of the operating rod 53 is rotatably connected to the other gripping arm 5b. And if the operation lever 54 provided in the base end part of the action | operation stick | rod 53 is operated, the other holding arm 5b can be opened and closed with respect to one holding arm 5a. The insulating operation rod 5 is formed of an insulating plastic pipe or the like in the middle of the operation rod 51 and the operation rod 53, and ensures insulation so as to be suitable for the indirect hot wire method.

  Referring to FIG. 14, when the operation lever 54 is grasped and the operation lever 54 is brought close to the operation rod 51, the other gripping arm 5b can be closed with respect to the one gripping arm 5a. When the operation lever 54 is released, the other gripping arm 5b can be opened with respect to one gripping arm 5a by the force of a spring (not shown) connected to the control lever 54. FIG. 14 or FIG. 15 shows a state in which the other gripping arm 5b is opened to the maximum with respect to one gripping arm 5a.

  Referring to FIG. 15 or FIG. 16, one gripping arm 5a protrudes from a tapered gripping claw 51a. The gripping claw 51a forms 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 gripping arm 5b projects a tapered gripping claw 51b. The gripping claw 51b forms a gripping surface 50b. The gripping surface 50b is arranged with a predetermined opening angle with the gripping surface 50a. Referring to FIG. 14 or FIG. 15, when the operation lever 54 is gripped, the gripping surface 50b can be brought close to the gripping surface 50a.

  The insulation operating rod 5 shown in FIGS. 14 to 16 is a so-called “insulated Yoko” that can hold a high-voltage distribution line or the like arranged at a high place with a pair of holding claws 51a and 51b.

  Next, the structure of the adapter for indirect hot wire construction according to the prior art will be described. FIG. 17 is a perspective view showing the configuration of an adapter for indirect hot-wire construction according to the prior art. FIG. 18 is a longitudinal sectional view showing a configuration of an adapter for indirect hot wire construction according to the prior art. FIG. 19 is a perspective view of an adapter for indirect hot-wire work according to the prior art, and is a state diagram in which the adapter for indirect hot-wire work is attached to a pair of gripping rods.

  Note that FIGS. 17 and 18 of the present application correspond to FIGS. 17 and 18 of Patent Document 1. FIG. FIG. 19 of the present application corresponds to FIG. 19 of Patent Document 1.

  Referring to FIGS. 17 to 19, an adapter for indirect hot-wire construction (hereinafter abbreviated as “adapter”) 9 according to the prior art includes a block-shaped adapter body 91, a locking means 92, and an insertion plate 93. Yes.

  Referring to FIG. 19, the adapter main body 91 can be attached to a pair of open and closed curved gripping arms 5 a and 5 b provided at the distal end portion of the insulating operation rod 5. Further, the adapter main body 91 can hold a gripping object such as an electric wire W between a pair of gripping surfaces 90a and 90a facing each other (see FIG. 6 or FIG. 7).

  Referring to FIGS. 17 to 19, the adapter main body 91 opens the recess 91 h on the side opposite to the gripping surface 90 a. A gripping claw 51a or a gripping claw 51b that protrudes in the centrifugal direction from the pair of gripping arms 5a and 5b can be inserted into the recess 91h (see FIG. 14 or FIG. 15).

  Referring to FIG. 18 or FIG. 19, the adapter main body 91 fixes the insertion plate 93 to the gripping surface 90a. The insertion plate 93 has its proximal end fixed to the adapter main body 91 with a countersunk screw or the like. The insertion plate 93 protrudes from the adapter body 91 at the tip end side so as to extend along the gripping surface 90a.

  Referring to FIG. 18, the locking means 92 includes an engagement pin 921 and a compression coil spring 922. The engaging pin 921 includes a shaft portion 92s and a flange portion 92f. The shaft portion 92s is accommodated in a cylindrical portion 91p protruding from the outer wall of the adapter main body 91. Further, the shaft portion 92s has a tip portion protruding inward from the inner wall of the recess 91h. The flange portion 92f is in contact with the upper end edge of the cylindrical portion 91p.

  Referring to FIG. 18, the compression coil spring 922 is wound around the outer periphery of the shaft portion 92s. Further, the compression coil spring 922 is accommodated in the cylindrical portion 91p. One end portion of the compression coil spring 922 is fixed to the shaft portion 92s. The other end of the compression coil spring 922 is fixed to the inner wall of the cylindrical portion 91p. The compression coil spring 922 biases the force with which the tip end of the shaft portion 92s protrudes into the recess 91h.

  With reference to FIG. 17 or FIG. 18, when the hook 92 f is gripped and the engagement pin 921 is pulled up against the elastic force of the compression coil spring 922, the grip claw 51 a or the grip claw 51 b is accommodated in the recess 91 h. Yes (see FIG. 14 or FIG. 15). When the hook 92f is released, the tip of the engaging pin 921 can be brought into contact with the gripping claw 51a or the gripping claw 51b from the surface opposite to the gripping surfaces 50a and 50b of the gripping claw 51a or the gripping claw 51b. The grip claw 51a or the grip claw 51b is provided with a recess 5d into which the tip of the engagement pin 921 enters (see FIG. 16).

  Referring to FIG. 17 or FIG. 19, the insertion plate 93 has a U-shaped cutout groove 93k cut out from the tip surface. When the operation lever 54 is operated (see FIG. 14) and the pair of insertion plates 93 and 93 are brought close to each other, the gap 72c of the cotter 7c and the outer wall of the first support 71 (see FIG. 9 or FIG. 10). A pair of insertion plates 93 and 93 can be inserted.

  Next, referring to FIG. 10, when the shaft 71c of the cotter 7c is introduced into the pair of cutout grooves 93k and 93k (see FIG. 23), the operation lever 54 is released (see FIG. 14). The pair of adapters 9 and 9 can be separated from each other. Then, the cotter 7 c can be pulled out from the tension insulator 7.

  On the other hand, there has been a problem that it is not easy to attach the cotter to the tension insulator or to remove the cotter pin from the cotter by holding the cotter according to the prior art or the split pin according to the prior art with the insulating operation rod. In particular, when attaching and detaching the cotter to the tension insulator, there was a problem that the split pin was easily dropped.

  In order to eliminate the above-described problems, a cotter for indirect hot wire construction is disclosed in which it is difficult to drop off the split pin and is easy to attach and detach with the indirect hot wire method (for example, see Patent Document 2).

JP 2010-4657 A No. 7-49057

  FIG. 20 is a perspective view showing a configuration of a cotter body included in a cotter for indirect hot wire construction according to the prior art, and a part thereof is shown in cross section. FIG. 21 is a perspective view showing a configuration of a core member provided in a cotter for indirect hot wire construction according to a conventional technique. FIG. 22 is a perspective view showing a configuration of a leaf spring member provided in a cotter for indirect hot wire construction according to the prior art.

  FIG. 23 is a perspective view showing a configuration of a cotter for indirect hot wire construction according to the prior art, and a part thereof is shown in cross section. FIG. 24 is a longitudinal sectional view showing a configuration of a cotter for indirect hot wire construction according to the prior art.

  FIG. 25 is a longitudinal sectional view showing a 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 body. FIG. 26 is a perspective view showing an example of using a cotter for indirect hot wire construction according to the prior art.

  20 to 24 of the present application correspond to FIGS. 1 to 5 of Patent Document 2. 25 and 26 of the present application correspond to FIGS. 6 and 7 of Patent Document 2.

  20 to 24, a cotter (hereinafter abbreviated as a cotter) 6 for indirect hot wire construction according to the prior art includes a cylindrical cotter body 61 having a hollow interior, a cylindrical core member 62, and , A leaf spring member 63 for retaining is provided.

  Referring to FIG. 20 or FIG. 23 and FIG. 24, the cotter body 61 includes a cylindrical portion 61a and a flange portion 61b. The cylindrical portion 61a opens in a direction opposite to the pair of rectangular windows 61w and 61w. The flange portion 61b has an inner diameter and an outer diameter larger than the inner diameter and the outer diameter of the cylindrical portion 61a.

  Referring to FIG. 21, FIG. 23, and FIG. 24, the core member 62 includes a flat plate-like protrusion 62a, a columnar shaft portion 62b, and a disk-shaped head portion 62c. The protrusion 62a can engage a connecting portion 63a of a leaf spring member 63, which will be described later, with the tip 621 (see FIG. 22). The shaft portion 62b can move slidably inside the cylindrical portion 61a. The outer diameter of the head portion 62c is larger than the outer diameter of the shaft portion 62b. The head 62c has an outer diameter smaller than the inner diameter of the flange 61b.

  22 to 24, the plate spring member 63 is formed of a metal plate having spring properties. 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 goes to the opposite direction (refer FIG. 22). The pair of protrusions 63b and 63b form an inclined surface 631 that inclines upward so as to open from the connecting portion 63a. Further, the pair of projecting portions 63b and 63b has an extending portion 632 that extends so as to face each other.

  Referring to FIG. 26, for example, when connecting a set of torsion straps St and St connected to armrest A and tension insulator 7, first, an opening provided at the end of torsion strap St and The cotter body 61 is inserted with the 1 through hole 71h being matched (see FIG. 9).

  Next, referring to FIG. 24, with the leaf spring member 63 attached to the distal end portion of the core member 62, the leaf spring member 63 is at the head, and the core member 62 is placed on the flange 61 b side of the cotter body 61. Insert from. Then, when the protrusions of the pair of protrusions 63b and 63b slide on the inner wall of the cotter main body 61 and the protrusion 63b reaches the window 61w, the pair of protrusions 63b and 63b protrude from the windows 61w and 61w ( (See FIG. 22 or FIG. 24). Thereby, the cotter 6 can be prevented from coming off.

  On the other hand, when the cotter 6 is pulled out from the state shown in FIG. 24, the core member 62 is further pushed into the back side of the cotter body 61 from the state shown in FIG. The cotter 6 according to Patent Document 2 is configured such that the inclined surface 631 of the projecting portion 63b slides on the edge of the window 61w, and the receiving portions of the pair of projecting portions 63b and 63b are retracted from the outer wall of the cotter body 61. Can be pulled out.

  20 to 24, the cotter 6 according to Patent Document 2 has an advantage that there is no fear of dropping the leaf spring member 63 corresponding to the split pin when the cotter 6 is attached to and detached from the tension insulator. However, the cotter 6 according to Patent Document 2 has a problem that it is not easy to operate the core member 62 using a tip tool for indirect hot wire construction.

  There is a need for an indirect hot-wire construction cotter that can prevent the cotter from being detached without using a split pin and that is easy to operate using an insulating operation rod for indirect hot-wire work. The above can be said to be the subject of the present invention.

  This invention is made | formed in view of such a subject, and it aims at providing the cotter for indirect hot wire construction which is easy to operate, without using a split pin.

  The inventor is provided with a pair of retaining opening / closing link plates that can be protruded and retracted from the distal end side of the first shaft portion of the cotter body, and an insulating operation rod having a pair of insertion plates attached to the distal end portion. When the collar is operated, the pair of opening and closing link plates can be closed in conjunction with the movement of the internal piston member, and the cotter can be easily attached to and detached from the tension insulator. Invented a new cotter for indirect hotline construction.

  (1) A cotter for indirect hot-wire construction according to the present invention is an indirect method of connecting at least one pair of tension insulators in a swingable manner by using a long insulating operation rod having a pair of opening and closing gripping arms at the tip. A cotter for hot wire construction, having a cylindrical first shaft portion, and a first flange portion formed at the base end portion of the first shaft portion, and a hollow cylindrical cotter main body, A cylindrical second shaft portion that is slidably held inside the cotter body, and a base end portion of the second shaft portion that is fixed to the first shaft portion with a predetermined gap. A pair of detachable rod-like piston members having a second flange and one end pivotably connected to the tip of the second shaft, and the other end can be protruded and retracted from the outer periphery of the first shaft. The opening / closing link plate for stopping and one end portion are rotatably connected to the intermediate portion of the second shaft portion, and the other end portions are rotated with each other. And a “lever” crank mechanism that is linked by a pair of freely connected auxiliary link plates, and the cotter body is configured to apply a force for moving the piston member in a state in which the pair of opening / closing link plates are raised. A compression coil spring that urges the member inside, and the insulating operating rod includes a pair of block-shaped adapter bodies that are detachably attached to the pair of gripping arms, and a difference fixed to a gripping surface of the pair of adapter bodies. An insertion plate, and the insertion plate has a U-shaped cutout groove into which the second shaft portion can be freely introduced, and the pair of insertion plates are connected to the first flange portion and the second flange portion. When the piston member is moved against the compression coil spring by inserting it between the parts, the other end of the pair of opening / closing link plates is buried in the state of being buried from the outer periphery of the first shaft part. The opening / closing link plate is closed.

  (2) The cotter body further includes a disc-shaped cover plate that detachably covers the distal end surface thereof, and the “lever” crank mechanism has a base end portion that rotates with the other end portion of the pair of auxiliary link plates. The guide plate further includes a guide rod that is movably connected and coaxially disposed with the piston member, and the lid plate has a guide hole that guides the guide rod movably in the axial direction at the center. preferable.

  (3) The cotter main body includes a retainer that slidably holds the second shaft portion of the piston member, prevents the piston member from falling off, and contacts one end surface of the compression coil spring. preferable.

  (4) It is preferable that the said cotter main body has a slit groove notched from the front-end | tip edge, and accommodates the other end part side of a pair of said opening-and-closing link board movably.

  The cotter for indirect hot-wire construction according to the present invention includes a pair of retaining link opening / closing link plates that can be protruded and retracted from the tip end side of the first shaft portion of the cotter body, and has a pair of insertion plates attached to the tip end. When the second rod part is operated with the operation rod, the pair of opening and closing link plates can be closed in conjunction with the operation of the internal piston member, and the cotter can be easily attached to and detached from the tension insulator.

It is a perspective view which shows the structure of the cotter for indirect hot wire construction by one Embodiment of this invention. It is a perspective exploded view which shows the structure of the cotter for indirect hot wire construction by the said embodiment. FIG. 3 is an exploded perspective view showing a configuration of a cotter for indirect hot wire construction according to the embodiment, and the cotter for indirect hot wire work is viewed from a direction different from FIG. 2. FIG. 4A is a state diagram in which a pair of opening and closing link plates provided in the cotter for indirect hot-line construction according to the embodiment is erected, and FIG. 4A is a plan view of the cotter for indirect hot-line work according to the embodiment, FIG. ) 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. 5A is a state diagram in which a pair of opening and closing link plates provided in the cotter for indirect hot wire construction according to the embodiment is closed, and FIG. 5A is a plan view of the cotter for indirect hot wire construction according to the embodiment, FIG. ) Is a right side view of FIG. 5 (A), FIG. 5 (C) is a left side view of FIG. 5 (A), and FIG. 5 (D) is a longitudinal sectional view of FIG. 5 (A). It is a front view which shows an example of the mounting pillar by a retaining armor. It is the elements on larger scale of Drawing 6, and is a state figure which removed the insulating cover from the retention clamp. FIG. 8A is a partially enlarged view of FIG. 7, FIG. 8A is a front view of the retaining clamp, and FIG. 8B is a view as seen from the arrow B in FIG. 8A. It is a figure which shows the structure of a tension insulator, FIG. 9 (A) is the front view of the tension insulator which showed a part in cross section, FIG.9 (B) is the right view of a tension insulator. It is a perspective view which shows the structure of the cotter by a prior art. It is a figure which shows the structure of the self-locking type split pin by a prior art, FIG. 11 (A) is a front view of a self-locking type split pin, FIG.11 (B) is AA of FIG. 11 (A). It is arrow sectional drawing. It is a front view which shows the structure by an example of the tension device for drawing an electric wire. It is a front view which shows the use condition of a wire tensioner. It is a front view which shows the structure by an example of the insulation operating rod by a prior art. It is the front view which expanded the principal part of FIG. FIG. 16 is a left side view of FIG. 15. It is a perspective view which shows the structure of the adapter for indirect hot wire construction by a prior art. It is a longitudinal cross-sectional view which shows the structure of the adapter for indirect hot wire construction by a prior art. It is a perspective view of the adapter for indirect hot wire construction by a prior art, and is a state figure which attached the adapter for indirect hot wire construction to a pair of grasping gutters. It is a perspective view which shows the structure of the cotter main body with which the cotter for indirect hot wire construction by a prior art is shown, and has shown one part by the 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. It is a perspective view which shows the structure of the cotter for indirect hot wire construction by a prior art, and has shown one part by the cross section. It is a longitudinal cross-sectional view which shows the structure of the cotter for indirect hot wire construction by a prior art. It is a longitudinal cross-sectional view which shows the structure of the cotter for indirect hot wire construction by a prior art, and is a state figure which pushed the core member inside with respect to the cotter main body. It is a perspective view which shows the usage example of the cotter for indirect hot wire construction by a prior art.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[Configuration of cotter for indirect hot-wire construction]
Initially, the structure of the cotter for indirect hot wire construction by one Embodiment of this invention is demonstrated. FIG. 1 is a perspective view showing a configuration of a cotter for indirect hot wire construction according to an embodiment of the present invention.

  FIG. 2 is an exploded perspective view showing the configuration of the cotter for indirect hot wire construction according to the embodiment. FIG. 3 is an exploded perspective view showing the configuration of the cotter for indirect hot-wire work according to the embodiment, and the cotter for indirect hot-wire work is viewed from a different direction from FIG.

  FIG. 4 is a state diagram in which a pair of opening and closing link plates provided in the cotter for indirect hot-line construction according to the embodiment is erected, and FIG. 4 (A) is a plan view of the cotter for indirect hot-line work according to the embodiment. 4B is a right side view of FIG. 4A, FIG. 4C is a left side view of FIG. 4A, and FIG. 4D is a longitudinal sectional view of FIG. 4A. It is.

  FIG. 5 is a state diagram in which a pair of opening and closing link plates provided in the cotter for indirect hot line construction according to the embodiment is closed, and FIG. 5A is a plan view of the cotter for indirect hot wire work according to the embodiment, 5 (B) is a right side view of FIG. 5 (A), FIG. 5 (C) is a left side view of FIG. 5 (A), and FIG. 5 (D) is a longitudinal sectional view of FIG. 5 (A). It is.

  In addition, since the effect | action of the component which has the code | symbol same as the code | symbol used by the prior art is made the same, description may be abbreviate | omitted below.

(overall structure)
Next, the whole structure of the cotter for indirect hot wire construction by one Embodiment of this invention is demonstrated. Referring to FIGS. 1 to 5, a cotter for indirect hot wire construction (hereinafter abbreviated as cotter) 10 according to an embodiment of the present invention includes a hollow cylindrical cotter body 1, a rod-like piston member 2, In addition, a “lever” crank mechanism 3 is provided.

  Referring to FIGS. 1 to 5, the cotter body 1 has a columnar first shaft portion 1 s and a first flange portion 1 f. The 1st collar part 1f is formed in the base end part of the 1st axial part 1s. The piston member 2 has a cylindrical second shaft portion 2s and a second flange portion 2f. The second shaft portion 2s is slidably held inside the cotter body 1. The second flange portion 2f is fixed to the proximal end portion of the second shaft portion 2s. Further, the second flange portion 2f is disposed to face the first flange portion 1f with a predetermined gap.

  Referring to FIGS. 2 to 5, the “lever” crank mechanism 3 has a pair of open / close link plates 3 a and 3 b for retaining and a pair of auxiliary link plates 3 c and 3 d in a rotating manner. The pair of opening / closing link plates 3a and 3b are rotatably connected at their one ends to the tip of the second shaft portion 2s. Further, the pair of opening / closing link plates 3a and 3b can protrude and retract from the outer periphery of the first shaft portion 1s on the other end side thereof. In addition, although the opening / closing link plate 3a and the opening / closing link plate 3b are the same, they are distinguished by changing the sign for convenience of explanation.

  Referring to FIGS. 2 to 5, the pair of auxiliary link plates 3 c and 3 d have their one end portions rotatably connected to the intermediate portion of the second shaft portion 2 s. The pair of auxiliary link plates 3c and 3d are connected to each other at their other end portions in a freely rotatable manner. Although the auxiliary link plate 3c and the auxiliary link plate 3d are the same, they are distinguished by changing the reference for convenience of explanation.

  Referring to FIG. 2 or FIG. 4 and FIG. 5, the cotter body 1 has a compression coil spring 11s inside. The compression coil spring 11s biases the piston member 2 with a force that moves the piston member 2 to a state in which the pair of opening / closing link plates 3a and 3b are raised.

Referring to FIG. 19, the insulating operation rod 5 includes a pair of block-shaped adapter bodies 91 and 91 and insertion plates 93 and 93. The pair of adapter bodies 91 and 91 can be attached to and detached from the pair of gripping arms 5a and 5b. The insertion plate 93 is fixed to the gripping surface 90 a of the adapter main body 91.
Referring to FIG. 1, the insertion plate 93 has a U-shaped cutout groove 93k cut out on the tip side. The second shaft portion 2s can be introduced into the cutout groove 93k from the outer peripheral direction.

  With reference to FIG. 1 or FIG. 4, a pair of insertion plates 93 and 93 are inserted between the first flange portion 1f and the second flange portion 2f, and the piston member 2 is moved against the compression coil spring 11s. Then, the pair of opening / closing link plates 3a, 3b can be closed so that the other end portions of the pair of opening / closing link plates 3a, 3b are buried from the outer periphery of the first shaft portion 1s (see FIG. 5).

  Referring to FIGS. 1 to 5, a cotter 10 according to the embodiment includes a pair of retaining opening / closing link plates 3 a and 3 b that can be protruded and retracted from the distal end side of the first shaft portion 1 s of the cotter body 1. When the second flange 2f is operated with the insulating operating rod 5 with the adapters 9 and 9 attached to the distal end (see FIG. 19), a pair of opening / closing link plates 3a and 3b is interlocked with the operation of the internal piston member 2. Can be closed and can be easily attached to and detached from the tension insulator 7 (see FIG. 9).

(Composition of cotter body)
Next, the configuration of the cotter body 1 according to the embodiment will be described. Referring to FIG. 2 or FIG. 3 and FIG. 5, the cotter body 1 includes a compression coil spring 11s inside. The cotter body 1 includes a retainer 13 inside. On the other hand, the piston member 2 has an intermediate flange portion 21f having an outer diameter larger than that of the second shaft portion 2s at the intermediate portion.

  Referring to FIG. 4 or FIG. 5, the compression coil spring 11 s covers the second shaft portion 2 s of the piston member 2. Further, the compression coil spring 11 s is disposed between the intermediate flange 21 f and the retainer 13.

  In the state shown in FIG. 4, the compression coil spring 11 s biases the piston member 2 with a force that moves the piston member 2 to a state in which the pair of opening / closing link plates 3 a and 3 b are raised. In the state shown in FIG. 4, the intermediate flange 21f is in contact with the stop wall of the cotter body 1, and it is difficult to move the piston member 2 to the right with respect to the cotter body 1, but the compression coil spring The pair of opening / closing link plates 3a and 3b is maintained in an upright state by being biased by 11s.

  With reference to FIG. 1 or FIG. 5, a pair of insertion plates 93 and 93 are inserted between the first flange portion 1f and the second flange portion 2f, and the piston member 2 is moved to the left side against the compression coil spring 11s. The pair of opening and closing link plates 3a and 3b can be closed in a state where the other end portions of the pair of opening and closing link plates 3a and 3b are buried from the outer periphery of the first shaft portion 1s.

  On the other hand, when the second flange 2f is released from the state shown in FIG. 5, the piston member 2 can be returned to the initial state by the biasing force of the compression coil spring 11s (see FIG. 4). And a pair of opening-and-closing link board 3a * 3b can be stood up (refer FIG. 1 or FIG. 4).

(Retainer configuration)
Next, the configuration of the retainer 13 according to the embodiment will be described. Referring to FIG. 2 or FIG. 4 and FIG. 5, the retainer 13 has a fitting hole 13h open at the center. The second shaft portion 2s of the piston member 2 is slidably held in the fitting hole 13h. 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 cotter body 1. Further, the retainer 13 is formed with a plurality of minus grooves 13d for rotating the retainer 13 on the front surface (see FIG. 2).

  With reference to FIG. 2, the retainer 13 can be fixed inside the cotter body 1. In the state shown in FIG. 4 or 5, the retainer 13 prevents the piston member 2 from falling off. In the state shown in FIG. 4 or FIG. 5, the retainer 13 is in contact with one end surface of the compression coil spring 11s. As described above, the retainer 13 holds the compression coil spring 11 s inside the cotter body 1.

  2 or 4 and 5, after assembling the retainer 13 and the compression coil spring 11 s inside the cotter main body 1, the second flange portion 2 f is press-fitted into the proximal end portion of the second shaft portion 2 s. It is preferable to fix. The second flange portion 2f may be fixed to the base end portion of the second shaft portion 2s with a set screw.

(Structure of “lever” crank mechanism)
Next, the configuration of the “lever” crank mechanism 3 according to the embodiment will be described. 2 to 5, the “lever” crank mechanism 3 further includes a guide rod 3s. The guide rod 3s has a base end portion rotatably connected to the other end portions of the pair of auxiliary link plates 3c and 3d. Further, the guide rod 3s is disposed coaxially with the piston member 2.

  On the other hand, referring to FIGS. 2 to 5, the cotter body 1 further includes a disc-shaped cover plate 12. The cover plate 12 can detachably cover the front end surface of the cotter body 1. The cover plate 12 has a guide hole 12h open at the center (see FIG. 2 or FIG. 3). The guide hole 12h can guide the guide rod 3s so as to be movable in the axial direction.

  Referring to FIG. 2 or FIG. 3, one end portions of the pair of opening / closing link plates 3a and 3b are accommodated in a notch groove 21d cut out on the tip end side of the second shaft portion 2s. Next, by pressing the connecting pin 31p into the hole 21h with the hole 31h opened at one end of the pair of opening / closing link plates 3a and 3b and the hole 21h communicating with the notch groove 21d being aligned, One end portions of the pair of opening / closing link plates 3a and 3b and the distal end portion of the second shaft portion 2s can be rotatably connected.

  Referring to FIG. 2 or FIG. 3, one end of the auxiliary link plate 3c is inserted into the intermediate opening 31k of the opening / closing link plate 3a, and the hole opened at one end of the auxiliary link plate 3c and the intermediate portion of the opening / closing link plate 3a With the connecting hole 32p being press-fitted into the hole of the opening / closing link plate 3a in a state where the holes opened are aligned, the one end portion of the auxiliary link plate 3c and the intermediate portion of the opening / closing link plate 3a can be rotatably connected. .

  Similarly, referring to FIG. 2 or FIG. 3, one end of the auxiliary link plate 3d is inserted into the intermediate opening 31k of the open / close link plate 3b, and a hole opened at one end of the auxiliary link plate 3d and the open / close link plate 3b. With the hole opened in the middle portion of the opening, the connecting pin 32p is press-fitted into the hole of the opening / closing link plate 3b, so that the one end portion of the auxiliary link plate 3d and the middle portion of the opening / closing link plate 3b are rotatable. Can be linked.

  Referring to FIG. 2 or FIG. 3, the other end portions of the pair of auxiliary link plates 3c and 3d are accommodated in a cutout groove 31d cut out on the tip end side of the guide rod 3s. Next, the connecting pin 33p is press-fitted into the hole of the guide rod 3s in a state where the hole opened at the other end of the pair of auxiliary link plates 3c and 3d and the hole communicating with the cutout groove 31d are aligned. Thus, the other end portions of the pair of auxiliary link plates 3c and 3d and the tip end portion of the guide rod 3s can be rotatably connected.

  2 to 5, the “lever” crank mechanism 3 is a four-joint rotation chain type link mechanism including a pair of open / close link plates 3a and 3b and a pair of auxiliary link plates 3c and 3d. It is composed.

(Configuration of the first shaft part)
Next, the configuration of the first shaft portion 1s according to the embodiment will be described. Referring to FIGS. 1 to 4, the first shaft portion 1 s has a slit groove 111 cut out at a predetermined depth from the tip edge. In the slit groove 111, the other end portions of the pair of opening / closing link plates 3a and 3b can be movably accommodated. In addition, a hole 11h penetrating the center is opened in the first shaft portion 1s. The connection pin 31p can be press-fitted into the distal end portion of the second shaft portion 2s through the hole 11h (see FIG. 2 or FIG. 3).

[Operation of cotter for indirect hot wire construction]
Next, the operation and effect of the cotter 10 will be described while explaining the operation method of the cotter 10 according to the embodiment.

  Referring to FIG. 19, first, adapters 9 and 9 are attached to a pair of gripping arms 5a and 5b. Next, with reference to FIG. 1 or FIG. 4, a pair of insertion plate 93 * 93 is inserted between the 1st collar part 1f and the 2nd collar part 2f. Next, the operation lever 54 is operated (see FIG. 14), and the piston member 2 is moved in the direction in which the second flange 2f is separated from the first flange 1f against the compression coil spring 11s (FIG. 5). reference). Thereby, a pair of opening-and-closing link board 3a * 3b can be closed in the state where the other end part of a pair of opening-and-closing link boards 3a * 3b is buried from the perimeter of the 1st axis part 1s (refer to Drawing 5).

  On the other hand, when the second flange 2f is released from the state shown in FIG. 5, the piston member 2 can be returned to the initial state by the biasing force of the compression coil spring 11s (see FIG. 4). And a pair of opening-and-closing link board 3a * 3b can be stood up (refer FIG. 1 or FIG. 4). Thereby, the cotter main body 1 can be prevented from coming off.

  Referring to FIGS. 1 to 5, a cotter 10 according to the embodiment includes a pair of retaining opening / closing link plates 3 a and 3 b that can be protruded and retracted from the distal end side of the first shaft portion 1 s of the cotter body 1. When the second flange 2f is operated with the insulating operating rod 5 with the adapters 9 and 9 attached to the distal end (see FIG. 19), a pair of opening / closing link plates 3a and 3b is interlocked with the operation of the internal piston member 2. Can be closed and can be easily attached to and detached from the tension insulator 7 (see FIG. 9).

  Referring to FIGS. 1 to 5, the cotter 10 according to the embodiment can prevent the cotter from being detached without using a split pin, and at least one set of the insulating operation rod 5 for indirect hot wire construction. The tension insulators 7 and 7 can be easily pivotably coupled (see FIG. 4).

The cotter for indirect hot wire construction according to the present invention can be expected to have the following effects.
(1) The tension insulator can be easily replaced by indirect hot wire work.
(2) There is no need to operate a small split pin.
(3) No worry about dropping the split pin.
(4) It is not necessary to insert a split pin into the small hole of the cotter by using an insulating operation rod.

  The present invention disclosed an indirect hot-wire construction cotter that can easily connect a pair of tension insulators using an insulating operation rod for indirect hot-wire work. The tension insulator and the torsion strap can be easily connected without being limited to the tension insulators.

DESCRIPTION OF SYMBOLS 1 Cotter main body 1f 1st collar part 1s 1st shaft part 2 Piston member 2f 2nd collar part 2s 2nd shaft part 3 "Lever" crank mechanism 3a * 3b A pair of opening-and-closing link board 3c * 3d A pair of auxiliary link board 5 Insulation Operation rod 5a ・ 5b A pair of gripping arms 7 Tensile insulator 10 cotters (cotters for indirect hot wire construction)
11s Compression coil spring 90a / 90a A pair of gripping surfaces 91/91 A pair of adapter main bodies 93/93 A pair of insertion plates 93k Notch groove

Claims (4)

A cotter for indirect hot-wire construction in which at least one pair of tension insulators is slidably connected using a long insulating operation rod having a pair of opening and closing gripping arms at the tip,
A cylindrical cotter body having a cylindrical first shaft portion, and a first flange portion formed at a proximal end portion of the first shaft portion, and having a hollow inside;
A cylindrical second shaft portion that is slidably held inside the cotter body, and a base end portion of the second shaft portion that is fixed to the first shaft portion with a predetermined gap. A rod-shaped piston member having a second collar portion;
One end portion is rotatably connected to the tip end portion of the second shaft portion, and a pair of retaining opening / closing link plates whose other end portion can freely protrude and retract from the outer periphery of the first shaft portion, and the one end portion are A lever crank mechanism that is rotatably connected to an intermediate portion of the second shaft portion and is rotationally linked by a pair of auxiliary link plates that are rotatably connected to each other.
The cotter main body includes a compression coil spring that urges the piston member to move the piston member in a state where the pair of opening / closing link plates are erected,
The insulating operation rod is
A pair of block-shaped adapter bodies detachably attached to the pair of gripping arms;
An insertion plate fixed to a gripping surface of the pair of adapter bodies,
The insertion plate has a U-shaped cutout groove into which the second shaft portion can be freely introduced,
When the pair of insertion plates are inserted between the first flange portion and the second flange portion and the piston member is moved against the compression coil spring, the other ends of the pair of opening / closing link plates A cotter for indirect hot wire construction in which a pair of the opening and closing link plates are closed in a state where the portion is buried from the outer periphery of the first shaft portion. The cotter body further includes a disc-shaped cover plate that detachably covers the tip surface thereof,
The lever crank mechanism further includes a guide rod having a base end portion rotatably connected to the other end portion of the pair of auxiliary link plates and arranged coaxially with the piston member,
The cotter for indirect hot wire construction according to claim 1, wherein the cover plate has a guide hole that opens the guide bar so as to be movable in the axial direction at the center.   The cotter body includes a retainer that slidably holds the second shaft portion of the piston member, prevents the piston member from falling off, and contacts one end surface of the compression coil spring. 2. The cotter for indirect hot wire construction described in 2.   The indirect hot wire construction according to any one of claims 1 to 3, wherein the cotter main body has a slit groove that is cut out from a tip edge thereof and movably accommodates the other end side of the pair of opening / closing link plates. For cotters.

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