JP6601133B2 - Indirect hot line construction cotter - Google Patents

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. 15 is a front view showing an example of a pillar with a retaining pillar. Referring to FIG. 15, the armor 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. 15, 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. 16 is a partially enlarged view of FIG. 15 and is a state diagram in which the insulating cover is removed from the retention clamp. 17 is a partially enlarged view of FIG. 16, FIG. 17 (A) is a front view of the retaining clamp, and FIG. 17 (B) is a view as seen from the arrow B of FIG. 17 (A).

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

  Referring to FIG. 18, the tension insulator 7 includes a cylindrical main body 70 formed 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. 16 or FIG. 18, a pair of tension insulators 7 with the cotter 7c as the center is inserted by aligning the first through hole 71h and the second through hole 72h and inserting a cylindrical cotter 7c. -7 can be pivotably connected to each other.

  Referring to FIG. 16 or FIG. 18, a set of the cotter 7c as a center is formed by inserting the cotter 7c so that the opening provided at the end of the torsion strap St is aligned with the first through hole 71h. The torsion strap St · St and one tension insulator 7 can be swingably connected.

  Referring to FIG. 16 or FIG. 18, 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 with the cotter 7c as the center is inserted. 7 and the tension clamp Ci can be pivotably coupled.

  Referring to FIG. 17, 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. 17, 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. 19, the cotter 7 c according to the prior art includes a cylindrical shaft portion 71 c and a flange portion 72 c. 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. 16), 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. 19 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. 20 is a stainless steel split pin called a self-locking type. Referring to FIG. 20, 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.

  Referring to FIG. 16 or FIG. 17, power distribution work such as connecting the tension insulator 7 with the cotter 7 c or pulling out 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. 15, when exchanging the tension insulator 7, as shown in FIG. 16, it is necessary to pull the electric wire W toward the arm metal A and release the load on the cotter 7 c. In order to draw such wires, a wire rod for indirect hot wire construction called a strain rod is used.

  FIG. 21 is a front view showing a configuration of an example of a wire drawing device for drawing electric wires. FIG. 22 is a front view showing a usage state of the wire tensioner. Referring to FIG. 21 or FIG. 22, the wire tensioner 8 is constituted by a cylindrical main body 81 having a cavity inside and a telescopic rod 82. The telescopic rod 82 is connected to the main body 81 so as to be movable in the axial direction.

  Referring to FIG. 21 or FIG. 22, 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.

  Referring to FIG. 21 or FIG. 22, 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. 21 or FIG. 22, 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. 22).

  Referring to FIG. 21 or FIG. 22, 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. 22, 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. 21 or FIG. 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 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. 22, the usage method of the wire tensioner 8 is demonstrated. 22 is different from FIGS. 15 and 16 in that the edge line We is supported by the pin insulator 7p, but the other configurations are the same.

  First, referring to FIG. 22, 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, with reference to FIG. 22, a common operation rod (not shown) is connected to the joint fitting 83, and the common operation rod is operated to lift one end side 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. 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 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. 19).

  Next, referring to FIG. 18B or FIG. 19, the cotter 7 c is hit from the opposite side of the collar portion 72 c with a tie stick hammer (not shown) to cause the collar portion 72 c to protrude. 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.

  As described above, there has been a problem that it is not easy to attach the cotter to the tension insulator or 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 solve 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 1).

No. 7-49057

  FIG. 23 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. 24 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. 25 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. 26 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. 27 is a longitudinal sectional view showing a configuration of a cotter for indirect hot wire construction according to the prior art.

  FIG. 28 is a longitudinal sectional view showing the configuration of a cotter for indirect hot wire construction according to the prior art, in which a core member is pushed into the cotter 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 FIG. 23 to FIG. 27 of the present application correspond to FIG. 1 to FIG. 28 and 29 of the present application correspond to FIGS. 6 and 7 of Patent Document 1.

  Referring to FIGS. 23 to 27, an indirect hot wire cotter (hereinafter abbreviated as cotter) 6 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. 23 or FIG. 26 and FIG. 27, the cotter body 61 is composed of 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. 24 or FIG. 26 and FIG. 27, 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. 25). 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.

  Referring to FIGS. 25 to 27, 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. 25). 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. 29, 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 holes 71h being matched (see FIG. 18).

  Next, referring to FIG. 27, 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. 25 or FIG. 27). 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. 27, 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 1 is configured such that the inclined surface 631 of the projecting portion 63b slides to 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 main body 61. Can be pulled out.

  23 to 27, the cotter 6 according to Patent Document 1 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 or removed from the tension 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 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 coming out of at least one pair of tension insulators without using a split pin, and that is easy to operate using an insulating operation rod for indirect hot-wire construction. ing. The above can be said to be the subject of the present invention.

  The present invention has been made in view of such a problem, and can prevent a cotter from being detached from at least one pair of tension insulators without using a split pin, and is an insulating operation rod for indirect hot wire construction. An object of the present invention is to provide a cotter for indirect hot wire construction that is easy to operate.

  The inventor has provided a retaining hole penetrating the cotter body on the opposite side to the collar portion, and fitted a ring member containing a pin whose tip portion can be projected and retracted from the inner periphery to the shaft portion. It was considered that the cotter body could be retained from at least one pair of tension insulators by immersing it in the retaining holes, and based on this, the following new indirect hot-wire construction cotters were invented.

  (1) The cotter for indirect hot-wire construction according to the present invention includes at least one tension insulator having a first through hole penetrating the first support portion having a double clevis shape and a second support portion having a single clevis shape. A cotter for indirect hot wire construction for oscillatingly connecting the other tension insulator having a second through hole penetrating through a cylindrical shape that can be inserted into the first through hole and the second through hole. A first cotter body having a first shaft portion and a first flange portion formed at a proximal end portion of the first shaft portion and having an outer diameter larger than an outer diameter of the first shaft portion; A first ring member for retaining the outer periphery, which forms an inner periphery that can be fitted to one shaft portion, and has a long insulating operation rod having a pair of opening and closing gripping arms at the tip portion; The first shaft portion has a first retaining hole penetrating the shaft center on the side opposite to the first flange portion, The first ring member is housed therein, and has one or more cylindrical first pins whose front end portions can protrude and retract from the inner periphery of the first ring member, and the front end portion of the first pin is the first ring member. A first urging member for urging the first pin with a force protruding from the inner periphery of the first pin, and in a state where the tip of the first pin is immersed in the first retaining hole, the first urging member The movement of the first ring member is restricted with respect to the cotter body.

  (2) It is preferable that the first ring member has a plurality of the first pins arranged at equal intervals.

  (3) It is preferable that the first pin has a hemispherical tip.

  (4) The cotter for indirect hot wire construction according to the present invention includes at least one tension insulator having a first through hole penetrating the first support portion having a double clevis shape and a second support portion having a single clevis shape. A cotter for indirect hot-wire construction for connecting the other tension insulator having the second through hole penetrating to the first and second through holes so as to be swingable, and having a cylindrical shape that can be inserted into the first through hole and the second through hole. A second cotter body having a second shaft portion and a second flange portion formed at a proximal end portion of the second shaft portion and having an outer diameter larger than an outer diameter of the second shaft portion; A second ring member for retaining the outer periphery, the inner periphery of which can be fitted to the shaft portion, and a long insulating operation rod having a pair of opening and closing gripping arms at the distal end portion; The second shaft portion is formed on a side opposite to the second flange portion, and a second retaining hole penetrating the shaft center; A pair of lock pins that are disposed between the second flange portion and the second retaining hole and project from the outer periphery of the second shaft portion in opposite directions, and the second ring member is housed inside. , One or more cylindrical second pins whose front end portions can be projected and retracted from the inner periphery of the second ring member, and a force by which the front end portion of the second pin projects from the inner periphery of the second ring member. A second urging member for urging the two pins, and an L-shaped engagement groove cut out from an end surface of the second ring member so that the lock pin can be introduced freely. In the state where it is introduced at the end of the engaging groove, the tip of the second pin is immersed in the second retaining hole, and the movement of the second ring member is restricted with respect to the second cotter body.

  (5) It is preferable that the one or more second pins include a pair of second pins whose front ends are fitted to both ends of the second retaining hole.

  (6) It is preferable that the tip of the second pin is formed in a hemispherical shape.

  The cotter for indirect hot-wire construction according to the present invention uses an insulating operation rod for indirect hot-wire work without using a split pin, by fitting a ring member for retaining to the shaft portion of the cotter body, Can be easily retained.

It is a perspective view which shows the structure of the cotter for indirect hot wire construction by 1st Embodiment of this invention. It is a perspective exploded view showing the composition of the 1st ring member with which the cotter for indirect hot wire construction by a 1st embodiment is equipped. It is a figure which shows the structure of the retainer with which the cotter for indirect hot wire construction by 1st Embodiment is equipped, FIG. 3 (A) is a front view of a retainer, FIG.3 (B) is a side view of a retainer, FIG. ) Is a rear view of the retainer. It is a figure which shows the structure of the inner ring | wheel with which the cotter for indirect hot wire construction by 1st Embodiment is equipped, FIG. 4 (A) is a front view of an inner ring, FIG.4 (B) is a side view of an inner ring, FIG. ) Is a cross-sectional view taken along the line AA in FIG. It is a figure which shows the structure of the 1st ring member with which the cotter for indirect hot wire construction by 1st Embodiment is equipped, FIG. 5 (A) is a front view of a 1st ring member, FIG.5 (B) is a 1st ring. It is a longitudinal cross-sectional view of a member. It is a front view which shows the structure of the cotter for indirect hot wire construction by 1st Embodiment, and is a state figure which latched the 1st ring member to the 1st axial part of the 1st cotter main body. It is a perspective view which shows the structure of the cotter for indirect hot wire construction by 2nd Embodiment of this invention. It is a perspective exploded view which shows the structure of the 2nd ring member with which the cotter for indirect hot wire construction by 2nd Embodiment is equipped. It is a figure which shows the structure of the cotter for indirect hot wire construction by 2nd Embodiment, and FIG. 9 (A) is just before introducing the lock pin with which a 2nd axial part is provided in the engagement groove formed in the 2nd ring member. FIG. 9B is a cross-sectional view taken along the line AA of FIG. 9A, and FIG. 9C is a right side view of FIG. 9A. It is a front view which shows the structure of the cotter for indirect hot wire construction by 2nd Embodiment, and is the state figure in which the lock pin with which a 2nd axial part was equipped was introduced into the terminal end of the engaging groove formed in the 2nd ring member. It is a front view which shows the structure of the cotter for indirect hot wire construction by 2nd Embodiment, and is a state figure which latched the 2nd ring member to the 2nd axial part of the 2nd cotter main body. It is a front view which shows the structure by an example of the insulation operating rod which concerns on this invention. It is the front view which expanded the principal part of FIG. FIG. 14 is a left side view of FIG. 13. 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 15, and is a state figure which removed the insulating cover from the retention clamp. FIG. 17A is a partially enlarged view of FIG. 16, FIG. 17A is a front view of the retaining clamp, and FIG. 17B is a view as seen from the arrow B in FIG. 17A. It is a figure which shows the structure of a tension insulator, FIG. 18 (A) is a front view of the tension insulator which showed a part in cross section, FIG.18 (B) is a 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. 20 (A) is a front view of a self-locking type split pin, FIG.20 (B) is AA of FIG. 20 (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 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 into the 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 insulation operation rod)
First, before describing the configuration of an indirect hot-wire construction cotter according to an embodiment of the present invention, a configuration of an example of an insulating operation rod for operating the indirect hot-wire construction cotter will be described.

  FIG. 12 is a front view showing a configuration of an example of the insulating operation rod according to 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 insulating operation bar 5 includes 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. 12 or FIG. 13, 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. 12, 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. 12, 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. 12 or FIG. 13 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. 13 or FIG. 14, one gripping arm 5a projects 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. With reference to FIG. 12 or FIG. 13, 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. 12 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.

[First Embodiment]
(Composition of cotter for indirect hot line construction)
Next, the structure of the cotter for indirect hot wire construction according to the first embodiment of the present invention will be described. FIG. 1 is a perspective view showing a configuration of a cotter for indirect hot wire construction according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view showing the configuration of the first ring member provided in the cotter for indirect hot wire construction according to the first embodiment.

  FIG. 3 is a diagram illustrating a configuration of a retainer provided in the cotter for indirect hot wire construction according to the first embodiment, FIG. 3 (A) is a front view of the retainer, and FIG. 3 (B) is a side view of the retainer. FIG. 3C is a rear view of the retainer.

  FIG. 4 is a diagram illustrating a configuration of an inner ring provided in the cotter for indirect hot wire construction according to the first embodiment, FIG. 4 (A) is a front view of the inner ring, FIG. 4 (B) is a side view of the inner ring, FIG. 4C is a cross-sectional view taken along the line AA in FIG.

  FIG. 5 is a view showing a configuration of a first ring member provided in the cotter for indirect hot wire construction according to the first embodiment, FIG. 5 (A) is a front view of the first ring member, and FIG. FIG. 3 is a longitudinal sectional view of a first ring member.

  FIG. 6 is a front view showing the configuration of the cotter for indirect hot wire construction according to the first embodiment, and is a state diagram in which the first ring member is locked to the first shaft portion of the first cotter body.

(overall structure)
Referring to FIGS. 1 to 6, a cotter (hereinafter abbreviated as “cotter”) 10 for indirect hot wire construction according to a first embodiment of the present invention includes a first cotter body 1 and a first ring member 3 for retaining. I have.

  Referring to FIG. 1 or FIG. 6, the first cotter body 1 has a columnar first shaft portion 1 a and a first flange portion 1 b. The first shaft portion 1a can be inserted through the first through hole 71h and the second through hole 72h (see FIG. 18A). The first shaft portion 1a has a first retaining hole 11h penetrating the center of the shaft on the opposite side to the first flange portion 1b.

  With reference to FIG. 1 or FIG. 6, the 1st collar part 1b is formed in the base end part of the 1st axial part 1a. The 1st collar part 1b forms the outer diameter larger than the outer diameter of the 1st axial part 1a. The first collar 1b can grip the outer periphery using an insulating operation rod 5 having a pair of opening and closing gripping arms 5a and 5b at the tip (see FIGS. 12 to 14).

  Referring to FIG. 1 or FIG. 2 and FIG. 5 or FIG. 6, the first ring member 3 forms an inner periphery that can be fitted to the first shaft portion 1a. The first ring member 3 can grip the outer periphery using an insulating operation rod 5 having a pair of opening and closing gripping arms 5a and 5b at the tip (see FIGS. 12 to 14).

  Referring to FIG. 1 or FIG. 2 and FIG. 5 or FIG. 6, the first ring member 3 has a plurality of columnar first pins 31 and a first urging member 32. The first pin 31 is accommodated inside the first ring member 3. The first pin 31 can protrude from the inner periphery of the first ring member 3 at the tip. The first ring member 3 preferably has a plurality of first pins 31 arranged at equal intervals. The first pin 31 preferably has a hemispherical tip.

  Referring to FIG. 2, FIG. 5, and FIG. 6, the first urging member 32 urges the first pin 31 with the force that the tip of the first pin 31 protrudes from the inner periphery of the first ring member 3. Yes. The first urging member 32 is preferably constituted by a “helical spring” in which a spiral groove is formed on the outer periphery of the cylindrical member.

  Referring to FIG. 6, the movement of the first ring member 3 is restricted with respect to the first cotter body 1 in the state where the tip end portion of the first pin 31 is immersed in the first retaining hole 11h.

  With the above configuration, the cotter 10 according to the first embodiment has one tension insulator 7 having a first through hole 71h penetrating the first support portion 71 having a double clevis shape and the second support having a single clevis shape. The other tension insulator 7 having the second through hole 72h penetrating the portion 72 can be pivotably connected (see FIG. 16 or FIG. 18). Then, the cotter 10 can be prevented from being detached from the pair of tension insulators 7 and 7.

  The cotter 10 according to the first embodiment uses the insulating operation rod 5 for indirect hot wire construction without using the split pin, and the first ring member 3 for retaining the first shaft portion of the first cotter main body 1. By fitting to 1a, it can be easily retained.

(Configuration of first ring member)
Next, the configuration of the first ring member 3 according to the first embodiment will be described. Referring to FIGS. 2 to 5, the first ring member 3 forms an outer shell with an inner ring 3 a, an outer ring 3 b, and a pair of retainers 3 r and 3 r.

  Referring to FIG. 2 or FIG. 4, the inner ring 3a has a plurality of flanges 3af protruding in the centrifugal direction. These flanges 3af are intermittently arranged on the outer periphery of the inner ring 3a. Moreover, these flanges 3af can press-fit the edge to the inner wall of the outer ring | wheel 3b.

  Referring to FIG. 2 or FIG. 5, the first pin 31 and the first urging member 32 can be accommodated in the space between the flange 3af and the flange 3af. Corresponding to the space between the flange 3af and the flange 3af, the inner ring 3a has a hole 31ah from which the tip of the first pin 31 protrudes.

  Referring to FIG. 2 or FIG. 3, the retainer 3r has convex portions 31r and concave portions 32r alternately formed in the circumferential direction. The first pin 31 and the first biasing member 32 can be introduced into the convex portion 31r from the outer peripheral direction. A rivet pore is opened in the recess 32r.

  Referring to FIG. 2, the pair of retainers 3r and 3r are arranged so that the bottom surfaces of the recesses 32r of the retainer 3r face each other, and the pair of retainers 3r and 3r are rivets (not shown) through the flange 3af. By coupling, the plurality of first pins 31 and the first biasing member 32 can be accommodated in the inner ring 3a and the outer ring 3b (see FIG. 5).

(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 first embodiment.

  First, referring to FIG. 16 or FIG. 18, the first through hole 71 h that penetrates the first support portion 71 provided in one tension insulator 7 and the second support portion provided in the other tension insulator 7. A pair of tension insulators 7 and 7 can be swingably connected by aligning the second through hole 72h penetrating through 72 and inserting the first shaft portion 1a (see FIG. 1). In this case, the first shaft portion 1a is inserted into the first through hole 71h and the second through hole 72h by gripping the first flange 1b with a pair of opening and closing gripping arms 5a and 5b (see FIG. 12 or FIG. 13). Can be inserted easily.

  Next, referring to FIG. 1, the first ring member 3 is inserted into the first shaft portion 1 a against the urging force of the plurality of first pins 31. In this case, the first ring member 3 can be easily inserted into the first shaft portion 1a by gripping the outer periphery of the first ring member 3 with a pair of opening and closing gripping arms 5a and 5b (see FIG. 12 or FIG. 13). it can.

  Referring to FIG. 6, after the tip of first pin 31 slides on the outer periphery of first shaft portion 1a, the first cotter body is in a state where the tip of first pin 31 is immersed in first retaining hole 11h. 1, the movement of the first ring member 3 is restricted. Thereby, the cotter 10 according to the first embodiment can prevent the cotter 10 from being detached from the pair of tension insulators 7 and 7.

  The cotter 10 according to the first embodiment uses the insulating operation rod 5 for indirect hot wire construction without using the split pin, and the first ring member 3 for retaining the first shaft portion of the first cotter main body 1. By fitting to 1a, it can be easily retained.

  Since the cotter 10 by 1st Embodiment has arrange | positioned the some 1st pin 31 inside the 1st ring member 3, it is easy for the front-end | tip part of the 1st pin 31 to immerse in 11h of 1st retaining holes. There is a peculiar effect of being.

[Second Embodiment]
(Composition of cotter for indirect hot line construction)
Next, the structure of the cotter for indirect hot wire construction according to the second embodiment of the present invention will be described. FIG. 7 is a perspective view showing a configuration of a cotter for indirect hot wire construction according to a second embodiment of the present invention. FIG. 8 is an exploded perspective view showing a configuration of a second ring member provided in the cotter for indirect hot wire construction according to the second embodiment.

  FIG. 9 is a diagram showing the configuration of the cotter for indirect hot wire construction according to the second embodiment, and FIG. 9A shows an engagement groove formed on the second ring member by the lock pin provided on the second shaft portion. FIG. 9B is a cross-sectional view taken along the line AA of FIG. 9A, and FIG. 9C is a right side view of FIG. 9A. .

  FIG. 10 is a front view showing the configuration of the cotter for indirect hot wire construction according to the second embodiment, in which the lock pin provided on the second shaft portion is introduced at the end of the engagement groove formed in the second ring member. FIG.

  FIG. 11 is a front view showing the configuration of the cotter for indirect hot wire construction according to the second embodiment, and is a state diagram in which the second ring member is locked to the second shaft portion of the second cotter body.

(overall structure)
Referring to FIGS. 7 to 11, an indirect hot wire cotter (hereinafter abbreviated as “cotter”) 20 according to a second embodiment of the present invention includes a second cotter body 2 and a second ring member 4 for retaining. I have.

  Referring to FIGS. 7 to 11, the second cotter body 2 has a cylindrical second shaft portion 2a and a second flange portion 2b. The second shaft portion 2a can be inserted through the first through hole 71h and the second through hole 72h (see FIG. 18A).

  Referring to FIG. 7 or FIG. 8, the second shaft portion 2a includes a second retaining hole 21h and a pair of lock pins 21p and 21p. The second retaining hole 21h opens on the opposite side to the second flange 2b. The second retaining hole 21h passes through the center of the second shaft portion 2a (see FIG. 11).

  Referring to FIGS. 7 to 11, the pair of lock pins 21p and 21p are disposed between the second flange 2b and the second retaining hole 21h. Further, the pair of lock pins 21p and 21p protrudes from the outer periphery of the second shaft portion 2a in opposite directions.

  Referring to FIGS. 7 to 11, the second flange portion 2b is formed at the proximal end portion of the second shaft portion 2a. The 2nd collar part 2b forms the outer diameter larger than the outer diameter of the 2nd axial part 2a. The second collar portion 2b can grip the outer periphery using an insulating operation rod 5 having a pair of opening and closing gripping arms 5a and 5b at the tip (see FIGS. 12 to 14).

  Referring to FIG. 7 or FIG. 8, the second ring member 4 forms an inner periphery that can be fitted to the second shaft portion 2a. Further, the second ring member 4 can grip the outer periphery by using an insulating operation rod 5 having a pair of opening and closing gripping arms 5a and 5b at its distal end (see FIGS. 12 to 14).

  Referring to FIG. 8 or FIG. 11, the second ring member 4 includes a pair of cylindrical second pins 41 and 41 and second urging members 42 and 42. The second pin 41 is housed inside the second ring member 4. The second pin 41 can protrude from the inner periphery of the second ring member 4 at its tip. The pair of second pins 41 and 41 are disposed to face each other. The second pin 41 preferably has a hemispherical tip.

  Referring to FIG. 8 or FIG. 11, the second urging member 42 urges the first pin 31 with a force that the tip of the second pin 41 protrudes from the inner periphery of the second ring member 4. The second pin 41 is preferably composed of a “helical spring” in which a spiral groove is formed on the outer periphery of the cylindrical member.

  Referring to FIG. 2 and FIG. 8, the first pin 31 and the second pin 41 are the same, but for the convenience of explanation, they are distinguished by changing the reference numerals. Similarly, the first urging member 32 and the second urging member 42 are the same, but for the sake of convenience of explanation, they are distinguished by changing the reference numerals.

  Referring to FIGS. 7 to 10, the second ring member 4 has a pair of L-shaped engagement grooves 4d and 4d. The engagement groove 4 d is notched from the end surface of the second ring member 4. A pair of lock pins 21p and 21p can be introduced into the pair of L-shaped engagement grooves 4d and 4d.

  Referring to FIG. 10, in a state where lock pin 21p is introduced at the end of engagement groove 4d, the tip of second pin 41 is immersed in second retaining hole 21 (see FIG. 11). The movement of the second ring member 4 in the axial direction and the outer circumferential direction is restricted with respect to the second cotter body 2.

  With the above configuration, the cotter 20 according to the second embodiment includes one tension insulator 7 having the first through hole 71h penetrating the double clevis-shaped first support portion 71 and the single clevis-shaped second support. The other tension insulator 7 having the second through hole 72h penetrating the portion 72 can be pivotably connected (see FIG. 16 or FIG. 18). The cotter 20 can be prevented from coming off from the pair of tension insulators 7 and 7.

  The cotter 20 according to the second embodiment uses the insulating operation rod 5 for indirect hot wire construction without using the split pin, and the second ring member 4 for retaining the second shaft portion of the second cotter body 2. By fitting to 2a, it can be easily prevented from coming off.

(Configuration of second ring member)
Next, the structure of the 2nd ring member 4 by 2nd Embodiment is demonstrated. Referring to FIG. 8, the second ring member 4 has a pair of holding holes 4 h and 4 h that are open toward the axial center. The second pin 41 and the second urging member 42 can be accommodated in the holding hole 4h.

  Referring to FIG. 8, the holding hole 4 h can project the tip portion of the second pin 41, but the inner peripheral side of the second ring member 4 is reduced in diameter so that the second pin 41 does not fall off. Further, the holding hole 4h has an enlarged diameter on the outer peripheral side of the second ring member 4. The second pin 41 and the second urging member 42 can be accommodated with difficulty in dropping by press-fitting the disc-shaped lid 43 into the outer peripheral side of the holding hole 4h.

(Operation of cotter for indirect hot wire construction)
Next, the operation and effect of the cotter 20 will be described while explaining the operation method of the cotter 20 according to the second embodiment.

  First, referring to FIG. 16 or FIG. 18, the first through hole 71 h that penetrates the first support portion 71 provided in one tension insulator 7 and the second support portion provided in the other tension insulator 7. The pair of tension insulators 7 and 7 can be swingably connected by aligning the second through hole 72h penetrating through 72 and inserting the second shaft portion 2a (see FIG. 7 or 8). In this case, the second shaft portion 2a is inserted into the first through hole 71h and the second through hole 72h by gripping the second flange portion 2b with a pair of opening and closing grip arms 5a and 5b (see FIG. 12 or FIG. 13). Can be inserted easily.

  Next, referring to FIG. 7, the second ring member 4 is inserted into the second shaft portion 2 a against the urging force of the pair of second pins 41. In this case, the second ring member 4 can be easily inserted into the second shaft portion 2a by gripping the outer periphery of the second ring member 4 with a pair of opening and closing gripping arms 5a and 5b (see FIG. 12 or FIG. 13). it can.

  Referring to FIG. 9, in the process of moving the second ring member 4 toward the second flange portion 2b, it is preferable that the start end of the engagement groove 4d is disposed opposite to the lock pin 21p. The second ring member 4 is further moved toward the second flange 2b, and the lock pin 21p is introduced into the engagement groove 4d. Next, the lock pin 21p can be introduced into the end of the engagement groove 4d by rotating the second ring member 4 by a predetermined angle (see FIG. 10).

  The lock method shown in FIGS. 9 to 10 is called, for example, “twist lock” because the second ring member 4 is twisted and connected to the second shaft portion 2a.

  In the state shown in FIG. 10, the pair of second pins 41 and 41 have their tips fitted to both ends of the second retaining hole 21 h (see FIG. 11). Referring to FIG. 11, the movement of the second ring member 4 in the axial direction and the outer circumferential direction is restricted with respect to the second cotter body 2 in a state where the tip end portion of the second pin 41 is immersed in the second retaining hole 21h. is doing. Thereby, the cotter 20 according to the second embodiment can prevent the cotter 20 from being detached from the pair of tension insulators 7 and 7.

  The cotter 20 according to the second embodiment uses the insulating operation rod 5 for indirect hot wire construction without using the split pin, and the second ring member 4 for retaining the second shaft portion of the second cotter body 2. By fitting to 2a, it can be easily prevented from coming off.

  In the cotter 20 according to the second embodiment, a pair of second pins 41 and 41 are disposed inside the second ring member 4, and the engaging groove 4d is engageable with a lock pin 21p provided on the second shaft portion 2a. Therefore, there is a specific effect that the movement of the second ring member 4 in the axial direction can be reliably regulated with respect to the second cotter body 2.

The cotter for indirect hot wire construction according to the present invention is 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 handle small split pins.
(3) No worry about dropping the split pin.
(4) The cotter can be easily attached using an insulating operation rod.

  Although this invention disclosed the cotter for indirect hot wire construction suitable for the connection of a tension insulator, it is anticipated that the cotter for indirect hot wire construction of this invention is applied besides a tension insulator.

DESCRIPTION OF SYMBOLS 1 1st cotter main body 1a 1st axis | shaft part 1b 1st collar part 3 1st ring member 5 Insulation operation rod 5a / 5b A pair of holding arm 7 Tensile strength insulator 10 Cotters (cotter for indirect hot wire construction)
11h 1st retaining hole 31 1st pin 32 1st biasing member 71 1st support part 71h 1st through hole 72 2nd support part 72h 2nd through hole

Claims (6)

At least one tension insulator having a first through-hole penetrating the first support portion having a double clevis shape and the other tension insulator having a second through-hole penetrating the second support portion having a single clevis shape. A cotter for indirect hot wire construction for connecting the
A cylindrical first shaft portion that can be inserted through the first through hole and the second through hole, and an outer diameter larger than the outer diameter of the first shaft portion, formed at the base end portion of the first shaft portion. A first cotter body having a first collar portion formed with
A first ring member for retaining the outer periphery of which the outer periphery can be gripped by using a long insulating operation rod having an inner periphery which can be fitted to the first shaft portion and having a pair of opening and closing gripping arms at the distal end portion. And comprising
The first shaft portion has a first retaining hole penetrating the shaft center on the side opposite to the first flange portion,
The first ring member is
One or more cylindrical first pins that are housed inside and whose tip is freely projecting and retracting from the inner periphery of the first ring member;
A first urging member for urging the first pin with a force at which a tip portion of the first pin protrudes from an inner periphery of the first ring member;
A cotter for indirect hot wire construction that restricts movement of the first ring member relative to the first cotter body when the tip of the first pin is immersed in the first retaining hole.   The cotter for indirect hot wire construction according to claim 1, wherein the first ring member has a plurality of the first pins arranged at equal intervals.   The indirect hot-wire construction cotter according to claim 1 or 2, wherein the first pin has a hemispherical tip. At least one tension insulator having a first through-hole penetrating the first support portion having a double clevis shape and the other tension insulator having a second through-hole penetrating the second support portion having a single clevis shape. Is a cotter for indirect hot wire construction,
A cylindrical second shaft portion that can be inserted into the first through hole and the second through hole, and an outer diameter larger than the outer diameter of the second shaft portion, formed at the base end portion of the second shaft portion. A second cotter body having a second collar portion formed with;
A second ring member for retaining the outer periphery, which has an inner periphery that can be fitted to the second shaft portion and has a long insulating operation rod having a pair of opening and closing gripping arms at the tip. And comprising
The second shaft portion is
A second retaining hole formed on the opposite side of the second flange and penetrating the shaft center;
A pair of lock pins disposed between the second flange portion and the second retaining hole and projecting from the outer periphery of the second shaft portion in opposite directions;
The second ring member is
One or more cylindrical second pins that are housed inside and whose tip is freely projecting and retracting from the inner periphery of the second ring member;
A second urging member that urges the second pin with a force that a tip of the second pin projects from an inner periphery of the second ring member;
An L-shaped engagement groove cut out from an end surface of the second ring member so that the lock pin can be introduced freely;
In a state where the lock pin is introduced into the end of the engagement groove, the tip of the second pin is immersed in the second retaining hole, and the second ring member is moved with respect to the second cotter body. Regulated cotter for indirect hot wire construction.   5. The cotter for indirect hot wire construction according to claim 4, wherein the one or more second pins are constituted by a pair of second pins whose front ends are fitted to both ends of the second retaining hole.   6. The cotter for indirect hot wire construction according to claim 4 or 5, wherein the second pin has a hemispherical tip.

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