JP2017208194A - Tension-resistant insulator unit and attachment method of tension-resistant insulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an attachment operation of an insulator easy in a power distribution operation.SOLUTION: A tension-resistant insulator unit 1 has a tension-resistant insulator 2 and a cotter 4. The cotter 4 includes a cotter extension part 50 extending from one end part to the other end part, and a cotter projection part 60 projecting from an outer periphery part of the cotter extension part 50. The tension-resistant insulator 2 includes: an insulator connection part 10 connectable with an object via the cotter 4; an insulator opening part 30 through which the cotter extension part 50 can be inserted by penetrating from one surface of the insulator connection part 10 to the other surface; and an insulator groove part 32 that is provided on an inner periphery surface of the insulator connection part 10 formed by the insulator opening part 30, penetrates through from one surface of the insulator connection part 10 to the other surface, and has a width larger than a width of the cotter projection part 60.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tension insulator unit and a tension insulator attachment method.

  The tension insulator is an insulating member used when the high-voltage electric wire is fixed to the support while being insulated. In power distribution work such as construction of a high-voltage electric wire, a cotter and a split pin are generally used when fastening a tension insulator to a support or connecting tension insulators to each other. In this case, first make the hole of the tension insulator and the hole of the support (or the holes of the tension insulator) communicate with each other, insert the cotter into the communicated hole, and then insert the split pin into the insertion hole of the cotter To do. The construction including the insulator installation work has been conventionally performed with a power failure in the construction site.

  On the other hand, in this method, since the surrounding area becomes a power failure, an indirect hot line method in which work is performed without causing a power failure in the surrounding area may be adopted in recent years. The indirect hot wire method uses an indirect hot wire tool such as a long insulating work bar called a hot stick, and works from outside the hot wire proximity range without directly touching the high voltage electric wire. For this reason, this indirect hot-wire method is less dangerous for the operator and only requires a power failure at the supply destination directly connected to the work pole. For example, Patent Document 1 describes that a tension insulator is fixed by an indirect hot wire method using a cotter and a split pin.

JP 2008-141890 A

  However, in the indirect hot wire method, since the work is performed from a distance using an insulating work bar, the work for attaching the tension insulator with the cotter may be difficult. Moreover, since the split pin is separated from the cotter, the split pin may be lost during work.

  In order to solve the above-described problems, an object of the present invention is to provide a tension insulator unit and a tension insulator attachment method that facilitate attachment work of tension insulators in power distribution work.

  In order to solve the above-described problems and achieve the object, the tension insulator unit of the present disclosure is a tension insulator unit including a tension insulator and a cotter, and the cotter is connected to the other end from one end. An insulator that has a cotter extending part extending to an end part, and a cotter protrusion protruding from an outer peripheral part of the cotter extending part, and the tension insulator can be connected to an object via the cotter. A connecting portion, a lever opening penetrating from one surface of the lever connecting portion to the other surface and allowing the cotter extension portion to be inserted therein, and an inner periphery of the lever connecting portion formed by the lever opening portion And an insulator groove portion that is provided on the surface and penetrates from one surface of the insulator connecting portion to the other surface, and has a width larger than the width of the cotter projection portion.

  In the tension insulator unit, the tension insulator is an inner peripheral surface of the insulator connecting portion, and is an intermediate portion between the one surface and the other surface from the other surface of the insulator connecting portion. It is preferable to further have an insulator auxiliary groove portion provided up to.

  In the tension insulator unit, it is preferable that a width of the insulator auxiliary groove is smaller than a width of the insulator groove and larger than a width of the cotter protrusion.

  In the tension insulator unit, the insulator groove portion includes a first insulator groove portion and a second insulator groove portion provided at a position opposed to the first insulator groove portion, and the insulator auxiliary groove portion includes When viewed from the central axis of the insulator opening, the first insulator auxiliary groove provided at a position shifted by approximately 90 degrees with respect to the first insulator groove and the position opposed to the first insulator auxiliary groove. And a second insulator groove.

  In order to solve the above-described problems and achieve the object, the tension insulator mounting method of the present disclosure includes a tension insulator that attaches the tension insulator to an object having an opening using the tension insulator unit. A connecting step for forming a communication opening by causing the lever connecting portion to face the object and communicating the opening of the lever and the opening of the object; and the cotter protrusion. An insertion step of inserting the cotter extension part into the communication opening so that the part passes through the insulator groove part, and the position of the cotter protrusion part and the insulator groove part in the cotter extension part after insertion. And a rotation step for rotating so as to shift.

  ADVANTAGE OF THE INVENTION According to this invention, the installation operation | work of the tension insulator in a power distribution operation can be made easy.

FIG. 1 is a perspective view of a tension insulator unit according to the first embodiment. FIG. 2 is an enlarged front view of the insulator connecting portion according to the first embodiment. FIG. 3 is a cross-sectional view of the insulator connecting portion according to the first embodiment viewed from the direction A in FIG. FIG. 4 is a front view of the cotter according to the first embodiment. FIG. 5 is a side view of the cotter according to the first embodiment. FIG. 6 is an explanatory diagram illustrating an example of a method for attaching the tension insulator according to the first embodiment to an object. FIG. 7 is an explanatory diagram illustrating an example of a method for attaching the tension insulator according to the first embodiment to an object. FIG. 8 is an explanatory diagram illustrating an example of a method for attaching the tension insulator according to the first embodiment to an object. FIG. 9 is an explanatory view showing another example of attaching the tension insulator to the object. FIG. 10 is a perspective view of a tension insulator unit according to the second embodiment. FIG. 11 is an enlarged front view of the insulator connecting portion according to the second embodiment. FIG. 12 is a cross-sectional view of the insulator connecting portion according to the second embodiment as viewed from the direction C in FIG. FIG. 13 is an explanatory diagram illustrating an example of a method for attaching the tension insulator according to the second embodiment to an object. FIG. 14 is an explanatory view showing an example of a method for attaching the tension insulator according to the second embodiment to an object. FIG. 15 is an explanatory diagram illustrating an example of a method for attaching the tension insulator according to the second embodiment to an object. FIG. 16 is an explanatory view showing another example of attaching the tension insulator to the object.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this embodiment, Moreover, when there are two or more embodiments, what comprises a combination of each Example is also included.

(First embodiment)
(The shape of the tension insulator unit)
FIG. 1 is a perspective view of a tension insulator unit according to the first embodiment. As shown in FIG. 1, the tension insulator unit 1 according to the first embodiment includes a tension insulator 2 and a cotter 4. The tension insulator 2 is an insulating insulator having an insulator connecting portion 10 provided at the bottom and a first insulator connecting portion 20A and a second insulator connecting portion 20B provided at the head opposite to the bottom. . Hereinafter, when the first insulator connecting portion 20A and the second insulator connecting portion 20B are not distinguished from each other, they are referred to as an insulator connecting portion 20. The tension insulator 2 is an instrument for insulating an electric wire, and at least one of the insulator connecting portion 10 and the insulator connecting portion 20 is used as an object such as another insulator, an electric wire retaining clamp, and an electric wire support mechanism. And are connected via the cotter 4.

  As shown in FIG. 1, an insulator opening 30 is opened in the insulator connecting portion 10. The cotter 4 can be inserted into the insulator opening 30. Moreover, 20 A of 1st insulator connection parts and 2nd insulator connection part 20B have mutually opposed through space. An insulator opening 30 is opened in the first insulator connecting portion 20A and the second insulator connecting portion 20B. The insulator openings 30 of the first insulator connecting portion 20A and the second insulator connecting portion 20B are opened with the same axis as the central axis. Therefore, the cotter 4 can be inserted into the lever opening 30 of the first lever connecting portion 20A and the second lever connecting portion 20B.

  Further, the insulator connecting portion 10 will be described in detail. FIG. 2 is an enlarged front view of the insulator connecting portion according to the first embodiment. FIG. 3 is a cross-sectional view of the insulator connecting portion according to the first embodiment viewed from the direction A in FIG. As shown in FIG. 2, the insulator connecting portion 10 is a circular member in front view provided at the tip of the shaft 12 provided at the bottom of the tension insulator 2. The insulator connecting portion 10 can be connected to another member (object) via the cotter 4. The insulator connecting portion 10 is provided with an insulator opening 30, a first insulator groove 32A and a second insulator groove 32B, a first insulator auxiliary groove 36A, and a second insulator auxiliary groove 36B.

  As shown in FIGS. 2 and 3, the insulator opening 30 is an opening penetrating from one surface 14 to the other surface 16 of the insulator connecting portion 10. The insulator opening 30 is a circular opening and forms the inner peripheral surface 31 of the insulator connecting part 10. It can be said that the insulator connecting portion 10 is a ring-shaped (annular) member having an insulator opening 30 opened at the center.

  As shown in FIG. 2, the first insulator groove portion 32 </ b> A is a groove provided on the inner peripheral surface 31 of the insulator connection portion 10. The first insulator groove portion 32 </ b> A penetrates from one surface 14 to the other surface 16 of the insulator connecting portion 10. More specifically, the first insulator groove 32A is provided such that the depth from the inner peripheral surface 31 toward the radially outer side of the insulator opening 30 is the depth L1. Further, the first insulator groove portion 32A is provided such that a width which is a length orthogonal to the direction of the depth L1 and the extending direction of the central axis of the insulator opening 30 is the width L2.

  The second insulator groove portion 32B is a groove provided on the inner peripheral surface 31 of the insulator connecting portion 10, and is provided at a location facing the first insulator groove portion 32A. It is preferable that the second insulator groove portion 32B is provided at a location that is deviated from the first insulator groove portion 32A by approximately 180 degrees around the central axis of the insulator opening portion 30. Here, “substantially 180 degrees” is an angle including a range shifted by a general tolerance with respect to 180 degrees, and “abbreviation” described below is also used in the same meaning. Other positions and shapes of the second lever groove 32B are the same as those of the first lever groove 32A. Hereinafter, when the first insulator groove portion 32A and the second insulator groove portion 32B are not distinguished from each other, they are referred to as an insulator groove portion 32. As described above, the insulator groove portion 32 may not be constituted by the two groove portions of the first insulator groove portion 32A and the second insulator groove portion 32B, and may be one groove portion or three or more groove portions. .

  As shown in FIGS. 2 and 3, the first insulator auxiliary groove portion 36 </ b> A is a groove provided on the inner peripheral surface 31 of the insulator connecting portion 10. The first insulator auxiliary groove portion 36A is provided at a position shifted by approximately 90 degrees with respect to the first insulator groove portion 32A when viewed from the central axis of the insulator opening portion 30. Further, the first insulator auxiliary groove portion 36 </ b> A is provided from the other surface 16 to the intermediate portion 17 of the insulator connecting portion 10. The intermediate portion 17 is a portion between the one surface 14 and the other surface 16. That is, the first insulator auxiliary groove portion 36 </ b> A is provided on the inner surface 31 of the insulator connecting portion 10 on the other surface 16 side, but does not penetrate to the one surface 14. Therefore, the first insulator auxiliary groove portion 36 </ b> A forms the seat surface 38 in the intermediate portion 17. More specifically, the first insulator auxiliary groove 36A is provided such that the depth from the inner peripheral surface 31 toward the radially outer side of the insulator opening 30 is the depth L3. Further, the first insulator groove portion 32A is provided such that a width that is a length orthogonal to the direction of the depth L3 and the extending direction of the central axis of the insulator opening 30 is the width L4. The width L4 is smaller than the width L2 of the insulator groove portion 32.

  The second insulator auxiliary groove portion 36B is a groove provided on the inner peripheral surface 31 of the insulator connecting portion 10, and is provided at a location facing the first insulator auxiliary groove portion 36A. It is preferable that the second insulator auxiliary groove portion 36B is provided at a position shifted from the first insulator auxiliary groove portion 36A by approximately 180 degrees around the central axis of the insulator opening portion 30. Other positions and shapes of the second insulator auxiliary groove portion 36B are the same as those of the first insulator auxiliary groove portion 36A. Hereinafter, when the first insulator auxiliary groove portion 36A and the second insulator auxiliary groove portion 36B are not distinguished from each other, they are referred to as an insulator auxiliary groove portion 36. As described above, the insulator auxiliary groove portion 36 does not have to be composed of the two groove portions of the first insulator auxiliary groove portion 36A and the second insulator auxiliary groove portion 36B, and may be one groove portion or three or more groove portions. May be.

  Next, the cotter 4 will be described. FIG. 4 is a front view of the cotter according to the first embodiment. FIG. 5 is a side view of the cotter according to the first embodiment. As shown in FIGS. 4 and 5, the cotter 4 includes a cotter extending part 50, a first cotter protrusion part 60 </ b> A, and a second cotter protrusion part 60 </ b> B. The cotter extending part 50 is a member extending from one end part 51 to the other end part 52, and is a columnar member in the present embodiment. The diameter of the cotter extension 50 is smaller than the diameter of the insulator opening 30. The shape of the cotter extension 50 may be any shape as long as it can be inserted into the insulator opening 30. For example, the diameter of the cotter extension 50 decreases toward the other end 52 that is the tip of the insulator opening 30. May be.

  The first cotter protrusion 60 </ b> A is a member that protrudes from the outer peripheral portion 54 of the cotter extension 50. More specifically, the first cotter protrusion 60 </ b> A is provided between one end 51 and the other end 52 of the cotter extension 50. Further, the first cotter protrusion 60A is provided on the outer peripheral portion 54 of the cotter extension 50 so that the height of the cotter extension 50 in the radial direction is a height L5. The height L5 is shorter than the depth L1 of the insulator groove portion 32 and the depth L3 of the insulator auxiliary groove portion 36. Further, the first cotter protrusion 60A is provided such that a width that is a length orthogonal to the direction of the height L5 and the extending direction of the cotter extending portion 50 is the width L6. The width L6 is smaller than the width L2 of the lever groove portion 32 and the width L4 of the lever auxiliary groove portion 36. That is, the width L4 is smaller than the width L2 and larger than the width L6.

  The second cotter protrusion 60 </ b> B is a member that protrudes from the outer peripheral portion 54 of the cotter extension 50. The second cotter projection 60B is provided on the opposite side of the outer peripheral portion 54 of the cotter extension 50 from the location where the first cotter projection 60A is provided. It is preferable that the second cotter protrusion 60B is provided at a location that is substantially 180 degrees away from the first cotter protrusion 60A with the central axis of the cotter extension 50 as the center. Other positions and shapes of the second cotter protrusion 60B are the same as those of the first cotter protrusion 60A. Hereinafter, when the first cotter protrusion 60A and the second cotter protrusion 60B are not distinguished from each other, they are referred to as a cotter protrusion 60. As long as the number of protrusions is the same as the number of insulator groove portions 32, the cotter protrusion 60 may not be composed of the two protrusions of the first cotter protrusion 60A and the second cotter protrusion 60B as described above. In addition, it may be one protrusion or three or more protrusions. Note that the cotter protrusion 60 is fixed to the cotter extension 50 and is not movable with respect to the cotter extension 50.

(Installation method of tension insulator)
Next, an example of a method for attaching the tension insulator 2 to the object 100 using the cotter 4 will be described. 6-8 is explanatory drawing which shows an example of the method of attaching the tension insulator which concerns on 1st Embodiment to a target object. In the following example, the object 100 is a tension insulator other than the tension insulator 2. In the following example, a method of connecting (attaching) the insulator connecting portion 10 of the tension insulator 2 and the connecting portion 101 provided on the bottom of the object 100 with the cotter 4 will be described. An opening 102 is opened in the connection portion 101 of the object 100. The target is not limited to the tension insulator as long as the opening 102 is a member that is open. The opening 102 has the same shape as the insulator opening 30, but the shape is arbitrary as long as the hole is large enough to insert the cotter 4.

  When attaching the tension insulator 2 to the object 100, the operator executes a communication step, an insertion step, and a rotation step. 6 shows a communication step, FIG. 7 shows an insertion step, and FIG. 8 shows a rotation step. This will be specifically described below. As shown in FIG. 6, when attaching the tension insulator 2 to the object 100, the operator holds the tension insulator 2 and the object 100 with an indirect hot wire tool (not shown) and The surface 14 is opposed to the surface of the connection part 101 of the object 100. Then, the operator communicates the insulator opening 30 of the tension insulator 2 with the opening 102 of the object 100 to form a communication opening 40 that is a hole through which the insulator opening 30 and the opening 102 communicate ( Communication step).

  FIG. 7A is a partial cross-sectional view of the tension insulator 2 and the object 100 in the insertion step. FIG. 7B is a view when seen from the direction B of FIG. After forming the communication opening 40, the operator holds the cotter 4 with an indirect hot wire tool (not shown) as shown in FIGS. 6 and 7, and starts the cotter 4 from the other end 52 side of the cotter 4. Is inserted into the communication opening 40 (insertion step). Specifically, the operator inserts the cotter 4 into the communication opening 40 from the surface of the object 100 that is not opposed to the tension insulator 2 in the insertion step of this example. Then, as shown in FIGS. 7A and 7B, when inserting the cotter 4 into the communication opening 40, the operator can insert the cotter protrusion 60 into the insulator groove 32 so that the cotter protrusion 60 passes through the insulator groove 32. The extending part 50 is inserted into the communication opening 40. That is, the operator inserts the cotter extension 50 into the communication opening 40 while matching the position of the cotter projection 60 with respect to the central axis of the communication opening 40 and the position of the insulator groove 32. The cotter protrusion 60 protrudes outward from the other surface 16 of the insulator connecting portion 10 (the surface on the side not facing the object 100 of the insulator connecting portion 10) through the insulator groove portion 32.

  FIG. 8A is a partial cross-sectional view of the tension insulator 2 and the object 100 in the rotation step. FIG. 8B is a view when seen from the direction B of FIG. After inserting the cotter 4 into the communication opening 40, the operator rotates the inserted cotter 4 around the central axis of the cotter extension 50 as shown in FIGS. 7 and 8 (rotation). Step). Specifically, the worker rotates the cotter extension 50 so that the positions of the cotter protrusion 60 and the lever groove 32 are shifted in the rotation step. That is, the worker rotates the cotter extension 50 to a position where the position of the cotter protrusion 60 with respect to the central axis of the communication opening 40 does not match the position of the lever groove 32.

  More specifically, as shown in FIG. 8B, the operator rotates the cotter extension 50 to a position where the positions of the cotter protrusion 60 and the lever auxiliary groove 36 match. In other words, the operator rotates the cotter extending part 50 by approximately 90 degrees to a position where the position of the cotter protrusion 60 with respect to the central axis of the communication opening 40 matches the position of the lever auxiliary groove 36. Then, the operator moves the cotter protrusion 60 in the direction of the seat surface 38 formed by the lever auxiliary groove 36 (the direction opposite to the inserted direction), and stores the cotter protrusion 60 in the lever auxiliary groove 36. .

  After rotating the cotter 4 and storing the cotter protrusion 60 in the insulator auxiliary groove 36, the operator releases the gripping of the tension insulator 2, the cotter 4, and the target object 100 by the indirect hot wire tool, The attachment of the tension insulator 2 to the object 100 is terminated. As shown in FIG. 8A, the insulator 2 and the object 100 are acting in a direction away from each other toward the direction R which is the radial direction of the insulator opening 30 and the opening 102 due to the tension. . However, since the cotter 4 is inserted into the insulator opening 30 and the opening 102, the tension insulator 2 remains attached to the object 100 by the cotter 4 even when the indirect hot wire tool is released. Become.

  As described above, the tension insulator unit 1 according to the first embodiment includes the tension insulator 2 and the cotter 4. The cotter 4 includes a cotter extension 50 extending from one end 51 to the other end 52, and a cotter protrusion 60 protruding from the outer peripheral portion 54 of the cotter extension 50. The tension insulator 2 has an insulator connecting portion 10, an insulator opening 30, and an insulator groove portion 32. The insulator connecting portion 10 can be connected to the object 100 via the cotter 4. The insulator opening 30 penetrates from one surface 14 to the other surface 16 of the insulator connecting portion 10 so that the cotter extending portion 50 can be inserted. The insulator groove portion 32 is provided on the inner peripheral surface 31 of the insulator connecting portion 10, penetrates from one surface 14 to the other surface 16 of the insulator connecting portion 10, and has a width larger than the width of the cotter protrusion 60.

  In the tension insulator unit 1, the cotter extension 50 can be inserted into the insulator opening 30 so that the cotter protrusion 60 passes through the insulator groove 32. The tension insulator unit 1 can rotate the inserted cotter 4 to shift the positions of the cotter protrusion 60 and the insulator groove 32. In this state, in the tension insulator unit 1, the cotter protrusion 60 projects outward in the radial direction from the insulator opening 30, so that the cotter 4 is prevented from coming out of the insulator opening 30. Therefore, the tension insulator unit 1 only needs to use the cotter 4 when attaching the tension insulator 2, and the split pin becomes unnecessary. Therefore, according to the tension insulator unit 1, the tension insulator 2 can be easily attached.

  Further, the tension insulator 2 has an insulator auxiliary groove 36. The insulator auxiliary groove portion 36 is provided on the inner peripheral surface 31 of the insulator connecting portion 10 from the other surface 16 to the intermediate portion 17 of the insulator connecting portion 10. According to the tension insulator 2, the cotter protrusion 60 of the cotter 4 inserted into the insulator opening 30 can be accommodated in the insulator auxiliary groove 36, so that the cotter 4 is preferably prevented from coming out. Can do.

  The width of the insulator auxiliary groove 36 is larger than the width of the cotter protrusion 60 and smaller than the width of the insulator groove 32. According to the tension insulator unit 1, the cotter 4 is inserted while the cotter protrusion 60 is passed through the large insulator groove 32, and the cotter protrusion 60 is accommodated in the insulator auxiliary groove 36 having a small width. It can be fixed. Therefore, according to this tension insulator unit 1, the tension insulator 2 can be attached more easily.

  Moreover, the insulator groove part 32 has 32 A of 1st insulator groove parts, and the 2nd insulator groove part 32B provided in the position facing 32 A of 1st insulator grooves. The insulator auxiliary groove portion 36 is formed with respect to the first insulator auxiliary groove portion 36A and the first insulator auxiliary groove portion 36A provided at a position shifted from the first insulator groove portion 32A by approximately 90 degrees when viewed from the central axis of the insulator opening portion 30. And a second insulator auxiliary groove 36B provided at a position facing each other. The tension insulator 2 includes a first insulator auxiliary groove portion 36A for housing the cotter protrusion portion 60A and a first insulator groove portion 36A at a position shifted by approximately 90 degrees with respect to the first insulator groove portion 32A and the second insulator groove portion 32B through which the cotter protrusion portion 60 passes. A two insulator auxiliary groove 36B is provided. Therefore, when this tension insulator 2 is used, the cotter 4 can be easily inserted and fixed.

  Further, when the tension insulator 2 is attached to the object having the opening 102 using the insulator unit 1, the communication step, the insertion step, and the rotation step are executed by the operator. The communication step forms the communication opening 40 by making the insulator connection portion 10 face the object 100 and communicating the insulator opening 30 and the opening 102 of the object 100. In the insertion step, the cotter extension 50 is inserted into the communication opening 40 so that the cotter protrusion 60 passes through the insulator groove 32. In the rotation step, the cotter extension 50 after insertion is rotated so that the positions of the cotter protrusion 60 and the insulator groove 32 are shifted. According to this attachment method, the attachment work of the tension insulator 2 is facilitated.

  6 to 8, the tension insulator 2 is attached to the connection portion 101 on the bottom side of the object 100, but the tension insulator 2 is attached to two opposite sides on the head side of the object 100. You may attach to connection part 101A, 101B. FIG. 9 is an explanatory view showing another example of attaching the tension insulator to the object. As shown in FIG. 9, the connecting portion 101A and the connecting portion 101B face each other through a space. Each of the connection portions 101A and 101B has an opening 102, and the central axes of the openings 102 coincide with each other.

  As shown in FIG. 9, when connecting the insulator connecting part 10 to the connecting parts 101A and 101B, the operator places the insulator connecting part 10 in the space between the connecting part 101A and the connecting part 101B in the communication step. To do. The worker arranges the insulator connecting portion 10 so that the other surface 16 (the surface on the side where the insulator auxiliary groove portion 36 is provided) of the insulator connecting portion 10 faces the connecting portion 101A. And an operator inserts the cotter 4 from the connection part 101B side in an insertion step. In this case, the cotter protrusion 60 is located between the other surface 16 of the insulator connecting portion 10 and the connecting portion 101A. Then, the operator rotates the cotter 4 in the rotation step, and stores the cotter protrusion 60 in the insulator auxiliary groove 36 provided on the other surface 16. Thereby, the attachment of the tension insulator 2 is completed. Since the cotter 4 is inserted into the holes (the opening 102 and the insulator opening 30) of the connecting portions 101A and 101B and the insulator connecting portion 10, the tension insulator 2 and the object are separated along the direction R. Even if the force is applied, the tension insulator 2 remains attached to the object 100.

(Second Embodiment)
Next, a second embodiment will be described. The tension insulator unit 1a according to the second embodiment is different from the first embodiment in that an insulator groove portion 32 is provided in an insulator connection portion 20a provided at the head of the tension insulator 2a. In the second embodiment, description of portions having the same configuration as that of the first embodiment is omitted.

  FIG. 10 is a perspective view of a tension insulator unit according to the second embodiment. As shown in FIG. 10, in the tension insulator 2a according to the second embodiment, the insulator groove portion 32 and the insulator auxiliary groove portion 36 are also provided in the insulator connecting portion 20a, that is, the first insulator connecting portion 20Aa and the second insulator connecting portion 20Ba. Is provided. The insulator connecting portion 10 provided at the bottom of the tension insulator 2a is not provided with the insulator groove portion 32 and the insulator auxiliary groove portion 36. However, similarly to the first embodiment, the insulator groove portion 32 and the insulator auxiliary groove portion 36 are provided. It may be.

  FIG. 11 is an enlarged front view of the insulator connecting portion according to the second embodiment. FIG. 12 is a cross-sectional view of the insulator connecting portion according to the second embodiment as viewed from the direction C in FIG. As shown in FIG. 11, the first insulator connecting portion 20Aa includes an insulator opening 30, a first insulator groove portion 32A and a second insulator groove portion 32B, and a first insulator auxiliary groove portion 36A and a second insulator auxiliary groove portion 36B. Is provided. Similarly, the second insulator connecting portion 20Ba is also provided with an insulator opening 30, a first insulator groove portion 32A and a second insulator groove portion 32B, and a first insulator auxiliary groove portion 36A and a second insulator auxiliary groove portion 36B. Yes. The shapes of the insulator opening 30, the first insulator groove 32A and the second insulator groove 32B, and the first insulator auxiliary groove 36A and the second insulator auxiliary groove 36B are the same as those in the first embodiment.

  As shown in FIG. 12, 1st insulator connection part 20Aa and 2nd insulator connection part 20Ba have mutually opposed through space. More specifically, one surface 14 of the first insulator connecting portion 20Aa and one surface 14 of the second insulator connecting portion 20Ba are opposed to each other through a space. Therefore, the other surface 16 of the first insulator connecting portion 20Aa, that is, the surface on which the insulator auxiliary groove portion 36 is provided is located on the side opposite to the second insulator connecting portion 20Ba. Similarly, the other surface 16 of the second insulator connecting portion 20Ba, that is, the surface on which the insulator auxiliary groove portion 36 is provided is located on the side opposite to the first insulator connecting portion 20Aa.

  Next, an example of a method for attaching the tension insulator 2a to the object 100 using the cotter 4 will be described. FIG. 13 to FIG. 15 are explanatory views showing an example of a method for attaching the tension insulator according to the second embodiment to an object.

  When attaching the tension insulator 2a to the object 100, the operator executes a communication step, an insertion step, and a rotation step, as in the first embodiment. FIG. 13 shows a communication step, FIG. 14 shows an insertion step, and FIG. 15 shows a rotation step. As shown in FIG. 13, when attaching the tension insulator 2 a to the object 100, the operator holds the tension insulator 2 a and the object 100 with an indirect hot wire tool (not shown) and connects the connection portion 101 of the object 100. Is arranged in a space between the first insulator connecting portion 20Aa and the second insulator connecting portion 20Ba. Then, the operator makes one surface of the connecting portion 101 face one surface 14 of the first insulator connecting portion 20Aa, and the other surface of the connecting portion 101 faces one surface 14 of the second insulator connecting portion 20Ba. Let And an operator makes the insulator opening part 30 of 1st insulator connection part 20Aa and 2nd insulator connection part 20Ba communicate with the opening part 102 of the target object 100, and the hole which the insulator opening part 30 and the opening part 102 connect. A certain communication opening 40 is formed (communication step).

  FIG. 14A is a partial cross-sectional view of the tension insulator 2a and the object 100 in the insertion step. FIG. 14B is a view when seen from the direction D of FIG. After forming the communication opening 40, the operator inserts the cotter 4 into the communication opening 40 from the other end 52 side of the cotter 4 (insertion step). Specifically, the operator inserts the cotter 4 into the communication opening 40 from the other surface 16 of the second insulator connection portion 20Ba in the insertion step of this example. Then, as shown in FIGS. 14A and 14B, when inserting the cotter 4 into the communication opening 40, the operator can insert the cotter protrusion 60 through the insulator groove 32 so that the cotter protrusion 60 passes through the insulator groove 32. The extending part 50 is inserted into the communication opening 40. The cotter protrusion 60 protrudes outward from the other surface 16 (the surface not facing the object 100) of the first insulator connection portion 20 </ b> Aa through the insulator groove portion 32.

  FIG. 15A is a partial cross-sectional view of the tension insulator 2a and the object 100 in the rotation step. FIG. 15B is a diagram when viewed from the direction D of FIG. After inserting the cotter 4 into the communication opening 40, the operator rotates the inserted cotter 4 about the central axis of the cotter extension 50 (rotation step). Specifically, the worker rotates the cotter extending portion 50 so that the positions of the cotter protrusion 60 and the lever groove portion 32 of the first lever connecting portion 20Aa are shifted in the rotation step. More specifically, as shown in FIG. 15B, the operator moves the cotter extension 50 to a position where the positions of the cotter protrusion 60 and the lever auxiliary groove 36 of the first lever connecting portion 20Aa match. Rotate. Then, the operator moves the cotter protrusion 60 in the direction of the seat surface 38 formed by the lever auxiliary groove 36 of the first lever connecting portion 20Aa, and stores the cotter protrusion 60 in the lever auxiliary groove 36.

  After rotating the cotter 4 and storing the cotter protrusion 60 in the insulator auxiliary groove 36, the operator releases the tension insulator 2a, the cotter 4, and the object 100 by the indirect hot wire tool and is resistant to damage. The attachment of the tension insulator 2 to the object 100 is terminated.

  In the above description, the insulator auxiliary groove 36 is provided on the surface opposite to the side where the first insulator connecting portion 20Aa and the second insulator connecting portion 20Ba face each other. However, the insulator auxiliary groove portion 36 may be provided on the side where the first insulator connecting portion 20Aa and the second insulator connecting portion 20Ba face each other. That is, the first insulator connecting portion 20Aa and the second insulator connecting portion 20Ba may face each other on the other surface 16 side where the insulator auxiliary groove portion 36 is provided.

  FIG. 16 is an explanatory view showing another example of attaching the tension insulator to the object. In the second insulator connecting portion 20Ba of FIG. 16, the surface facing the first insulator connecting portion 20Aa is the other surface 16 on which the insulator auxiliary groove portion 36 is provided. As shown in FIG. 16, when the cotter 4 is inserted into the communication opening 40, the cotter protrusion 60 is located between the other surface 16 of the second insulator connecting portion 20 </ b> Ba and the connecting portion 101. Then, the worker rotates the cotter 4 in the rotation step, and houses the cotter protrusion 60 in the lever auxiliary groove 36 provided on the other surface 16 of the second lever connecting portion 20Ba. Thereby, the attachment of the tension insulator 2a is completed. Since the cotter 4 is inserted into the communication opening 40, the tension insulator 2 a remains attached to the object 100 even when a force that separates the tension insulator 2 a and the object along the direction R acts. It becomes.

  As described above, also in the second embodiment, by connecting the insulator connecting portion 20a and the connecting portion 101 of the target object 100 via the cotter 4, the tension-resistant insulator 2a can be easily provided as in the first embodiment. It becomes possible to attach to.

  As mentioned above, although embodiment of this invention was described, this invention is not limited by the content of these embodiment. In addition, the above-described constituent elements include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. Furthermore, the above-described components can be appropriately combined. Furthermore, various omissions, substitutions, or changes of the components can be made without departing from the spirit of the above-described embodiment.

DESCRIPTION OF SYMBOLS 1 Tensile insulator unit 2 Tensile insulator 4 Cotter 10, 20 Insulator connection part 14 One surface 16 The other surface 30 Insulator opening part 31 Inner peripheral surface 32 Insulator groove part 36 Insulator auxiliary groove part 50 Cotter extension part 51 One end part 52 other end 60 cotter projection 100 object 101 connection 102 opening

Claims (5)

A tension insulator unit having a tension insulator and a cotter,
The cotter is
A cotter extension extending from one end to the other end;
A cotter protrusion protruding from the outer periphery of the cotter extension,
The tension insulator is
An insulator connecting portion connectable to an object via the cotter;
An insulator opening that penetrates from one surface of the insulator connecting portion to the other surface and into which the cotter extension can be inserted, and
An insulator groove portion provided on the inner peripheral surface of the insulator connecting portion formed by the insulator opening, penetrating from one surface of the insulator connecting portion to the other surface, and having a width larger than the width of the cotter projection portion When,
A tension insulator unit.   The tension insulator is an inner peripheral surface of the insulator connecting portion, and an insulator auxiliary groove portion provided from the other surface of the insulator connecting portion to an intermediate portion between the one surface and the other surface. The tension-resistant insulator unit according to claim 1, further comprising:   The tension insulator unit according to claim 2, wherein a width of the insulator auxiliary groove is smaller than a width of the insulator groove and larger than a width of the cotter protrusion. The said insulator groove part has a 1st insulator groove part and the 2nd insulator groove part provided in the position facing with respect to the said 1st insulator groove part,
The insulator auxiliary groove portion is formed with respect to the first insulator auxiliary groove portion provided at a position shifted by approximately 90 degrees with respect to the first insulator groove portion as viewed from the central axis of the insulator opening portion, and the first insulator auxiliary groove portion. The tension insulator unit according to claim 2, further comprising: a second insulator groove portion provided at an opposing position. A tension insulator mounting method for attaching the tension insulator to an object having an opening using the tension insulator unit according to any one of claims 1 to 4,
A communication step of forming a communication opening by causing the lever connection to face the object and communicating the lever opening and the opening of the object;
An insertion step of inserting the cotter extension into the communication opening so that the cotter protrusion passes through the insulator groove;
A rotation step of rotating the cotter extension after insertion so that the positions of the cotter protrusion and the insulator groove are shifted;
A method of attaching a tension insulator having

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