JP2014135186A - Bindless insulator and method for adjusting tension/relaxation of overhead line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bindless insulator with which adjustment of tension-relaxation of an overhead line such as a DV cable is safely conducted, without dismounting the DV cable from all hooking parts, by making it possible for a worker to mechanically pull the overhead line such as the DV cable alone, without using a rope and without assuming an awkward posture.SOLUTION: A bindless insulator 1 includes an insulator body 3, protrusion-shaped hooking parts 4-8, and a rotating hooking part 9. The rotating hooking part 9 is constituted of a rotation shaft 91 and disks 92, 93, and an antislipping means is formed on a circumferential surface of the disk 92. In addition, the bindless insulator 1 has a rotation direction regulation mechanism 10 to regulate in one direction the rotation of the rotation shaft 91. Furthermore, a tip part 322 with a through hole 14 of the insulator body 3 of the bindless insulator 1 is relatively rotatably connected with a base part 321 via a connection mechanism 15. According to this configuration, by rotating the rotation shaft 91 with a tool, the disk 92 is rotated so that a DV cable 2 can be pulled.

Description

  The present invention relates to a bindless insulator for attaching an overhead wire such as a low-voltage lead wire to a supported body such as a bracelet, and in particular, a bindless insulator capable of easily adjusting the tension and slack of the overhead wire, and the bindless insulator. It is related with the method of adjusting the tension and slackness of an overhead wire using.

  When attaching a low-voltage lead-in wire (hereinafter referred to as a DV electric wire) to an arm or the like of an existing utility pole, for example, as shown in Patent Document 1 and Patent Document 2, a cap-shaped shape provided at both ends of the arm metal In general, a bindless insulator is attached to a lead-in wire retainer via, for example, an approximately 8-shaped linear insulator attachment, and a DV electric wire is hooked on the bindless insulator.

There are two types of bindless insulators, one for small-diameter DV wires and one for large-diameter DV wires, which are used according to the DV wire diameter and nominal cross-sectional area. When the nominal cross-sectional area exceeds 14 mm ² , it is not a bindless insulator for a small-diameter DV wire shown in Patent Document 1 and Patent Document 2, but for a large-diameter DV wire as shown in FIG. The bindless insulator 500 is used.

  The bindless insulator for a large-diameter DV electric wire shown in FIG. 6 has a configuration in which the DV electric wire 505 is appropriately routed around the plurality of protrusions 502, 503, and 504 protruding from the insulator main body 501 and an approximately 8-character shape. The point that the linear insulator attachment 506 is attached to the through hole 507 is the same as the bindless insulator for a small-diameter DV electric wire shown in Patent Document 1 and the like, and the pressing member 508 is rotated to form the protrusion 502. By being displaced so as to be far away, the DV electric wire 505 is clamped between the pressing member 508 and the protruding body 502, or the clamping is released.

  Then, after the DV electric wire 505 is locked to the bindless insulator 500 for a large diameter DV electric wire shown in FIG. 6, the DV electric wire 505 is loosened or the DV electric wire 505 is not sufficiently tensioned from the beginning. After the DV wire 505 is removed from the protrusions 502, 503, and 504 of the bindless insulator 500, the DV wire 505 is pulled, and the DV wire 505 is again routed around the protrusions 502, 503, and 504 of the bindless insulator 500. In general, an operation of hooking the DV electric wire 505 to the bindless insulator 500 has been performed.

JP 2009-44939 A JP 2004-95305 A

However, the nominal cross-sectional area of the DV cable becomes large 38mm ^2, 60 mm ^2, with the weight becomes relatively large DV cable, DV wire has a twisted wire at the first place, will in the portion of twist DV wire It is easy to get caught outside.

  For this reason, it is impossible for a worker on a pillar to perform the work of pulling up the DV electric wire and the work of drawing the DV electric wire pulled up to the protrusion of the bindless insulator alone. It is necessary to perform a work such as pulling the DV electric wire with a strong posture or a large force. An operator on the ground pulls the DV electric wire up using a rope and temporarily holds it. In some cases, the workers on the pillar share the work of removing the DV electric wires from the protrusions of the bindless insulators and routing them again to the protrusions.

  Along with this, when a worker on the ground pulls up the DV electric wire using the rope, it is necessary to wrap the tape around the rope and the DV electric wire in order to securely attach the rope and the DV electric wire. At the same time, after the adjustment of the tension of the DV electric wire is completed, the work of stripping the tape is also required, which causes complication of the entire work of attaching the overhead wire to the arm metal or the like. And the operation | work which pulls up the DV electric wire using the rope by the worker on the ground was not necessarily easy by the weight of the DV electric wire and the ease of being caught in the twisted part.

  In addition, if the DV electric wires are removed from all the protrusions of the bindless insulator, if the ropes are not sufficiently attached to the DV electric wires, there may be a disadvantage that the DV electric wires fall. In addition, when a rope is attached to a DV electric wire and the DV electric wire is sequentially removed from all the protrusions of the bindless insulator, the DV electric wire suddenly comes off the unscheduled protrusions, and the work on the pillar It is also possible that members will lose their position.

  Therefore, the present invention makes it possible to pull an overhead wire such as a DV electric wire mechanically without using an unreasonable posture by using only one worker without using a rope. It is an object of the present invention to provide a bindless lever that can be safely operated without removing the DV electric wires from all the hooks and a method for adjusting the tension of the overhead wire using the bindless lever.

  The bindless insulator according to the present invention is made of an insulating material, and includes a polyhedral block-shaped insulator body having a through-hole to which an insulator fitting can be attached, and an overhead wire protruding from a required surface of the insulator body. A plurality of hook portions that can be hooked, and at least one hook portion of the plurality of hook portions is a rotary shaft that is rotatably attached to the lever body, and is integral with the rotary shaft. A rotation disk formed on the circumferential surface of the disk, and anti-slip means for preventing the overhead wire in contact with the circumferential surface from sliding when the disk rotates. In addition to being a hooking portion, it has a rotation direction restricting mechanism that restricts rotation of the rotating shaft in only one direction. Here, the “insulating material” may be ceramics, ceramics, or the like, but for example, a synthetic resin material or the like is suitable from the viewpoint of easiness of forming a disc having anti-slip means. The “insulator attachment” is an instrument for attaching the bindless insulator to a supported body such as a brace. Further, the “overhead wire” corresponds to a low-voltage lead-in wire, for example. Furthermore, the “slip prevention means” of the disk is formed by, for example, triangular or trapezoidal protrusions arranged in the circumferential direction on the circumferential surface of the disk. The number of rotation hooks may be one or more.

  As a result, while maintaining the state where the overhead wire is stretched over the circumferential surface of the disk of the rotary hooking portion, the overhead wire is removed from the other hooking portion and the overhead wire is stretched by the rotation direction regulating mechanism. Rotate the rotating shaft after restricting the rotating shaft to rotate only in the direction in which it can be adjusted, or restricting the rotating shaft to rotate only in the direction in which the overhead wire can be loosened By rotating the disc, the overhead wire spanned on the circumferential surface of the disc moves according to the rotation direction of the disc of the rotary hook, so that the operator does not pull the overhead wire with the force of the operator The overhead wire can be mechanically pulled in a required direction. For this reason, the worker does not need a large force when pulling the overhead wire, and the worker does not become unreasonable because the worker pulls the overhead wire. Further, since a cable is not required for pulling up the overhead wire, an operation for attaching the cable to the overhead wire and a task for removing the cable from the overhead wire are also unnecessary. Furthermore, since the overhead wire is not detached from all the hooks of the bindless insulator, the danger of the overhead wire coming off the bindless insulator and falling can be avoided.

  In the bindless insulator according to the present invention, the rotation direction restricting mechanism includes a gear that rotates integrally with the rotating shaft, and a member that is swingably attached to a required surface of the insulator body via a shaft body. The claw portion formed on the engaging member swings about the shaft body, whereby the gear teeth and the engaging member are engaged and released. (Claim 2).

  Accordingly, the engaging member is swung around the shaft portion, and the claw portion is engaged with the gear teeth so as to restrict the rotation shaft from rotating in a certain direction. As a result, when the disc is rotated to stretch the overhead wire, the disc is restricted from rotating in the direction of loosening the overhead wire, and the engaging member is swung around the shaft portion to By engaging with the gear teeth so as to restrict the rotation of the rotating shaft in the opposite direction, for example, when rotating the rotating shaft and thus the disk to loosen the overhead wire, the direction in which the overhead wire is stretched Even if the disk tries to rotate, it is regulated. The restriction of the rotation direction of the disk by the rotation direction restriction mechanism can be switched only by swinging the engaging member in the required direction around the shaft portion.

  The bindless insulator according to the present invention is characterized in that a mounting hole for mounting a rotation transmitting rod is formed at the rotation center of the rotating shaft. The rod for rotation transmission is attached to a tool such as a ratchet wrench, for example.

  As a result, the rod for rotation transmission of a tool such as a ratchet wrench is mounted in the mounting hole of the rotation shaft, and the tool such as a ratchet wrench is operated so that rotation is transmitted from the rod for rotation transmission to the rotation shaft. Therefore, the overhead wire spanned on the circumferential surface of the disc moves according to the rotation direction of the disc of the rotary hook, so the overhead wire is mechanically required instead of pulling the overhead wire by the operator's force. It becomes possible to pull in the direction.

  Furthermore, in the bindless insulator according to the present invention, a pressing member that is displaced in a direction closer to the rotary hook portion is disposed closer to the end than the rotary hook portion of the lever main body. (Claim 4).

  Thereby, it becomes possible to more securely hook the overhead wire to the bindless insulator by holding the overhead wire between the rotation hooking portion and the pressing member.

  Furthermore, the through hole into which the lever attachment can be mounted is arranged on the most distal end side of the lever main body, and the distal end portion having the through hole of the lever main body is connected to other parts of the lever main body. It is connected so that it can rotate relatively (Claim 5). That is, the through hole into which the lever attachment tool can be mounted is disposed on the end side of the pressing member of the lever main body.

  As a result, when the overhead wire is a twisted wire such as a DV electric wire, when the disk is rotated to adjust the tension of the overhead wire, the twisted portion of the overhead wire is caught at an unscheduled location, When it is no longer possible to pull, the portion of the body other than the tip of the lever main body is rotated to release the stranded portion of the overhead wire from being caught.

  An overhead wire tension adjustment method according to the present invention is an overhead wire tension adjustment method using the bindless insulator according to any one of claims 1 to 5, wherein the overhead wire is a portion of the plurality of hooking portions. Maintaining the state where the rotation hook is wound around the circumferential surface of the disk, and removing the rotation hook from the other hook, and the rotation direction restricting mechanism causes the rotation shaft to move in the required direction. And a step of rotating the rotating shaft in a required direction to rotate the disk and pulling the overhead wire in the required direction. (Claim 6).

  As a result, the overhead wire spanned on the circumferential surface of the disc can be moved in accordance with the rotation direction of the disc of the rotary hook, so that the worker can mechanically require the overhead wire without pulling the overhead wire manually. Therefore, the worker does not need a large force when pulling the overhead wire, and the worker does not become unreasonable because the worker pulls the overhead wire. Further, since the cable is not used to pull up the overhead wire, a step of winding the tape around the DV electric wire and the cable to securely attach the cable to the overhead wire and a step of stripping the tape to remove the cable from the overhead wire become unnecessary.

  As described above, according to the first to fifth aspects of the present invention, while maintaining the state where the overhead wire is hung on the circumferential surface of the disk of the rotary hook portion, Is in a removed state, and the rotation direction restriction mechanism restricts the rotating shaft to rotate only in the direction in which the overhead wire can be stretched, or only in the direction in which the overhead wire can be loosened. After restricting the rotation axis to rotate, rotate the rotation axis to rotate the disk, thereby rotating the overhead wire spanning the circumferential surface of the disk to the rotation direction of the rotation hook disk Therefore, it is possible to mechanically pull the overhead line in the required direction instead of pulling the overhead line with the force of the worker. Thereby, it is possible to eliminate the need for a large force when the worker pulls the overhead wire, and it is also possible to prevent the worker from being in an unreasonable posture because the worker pulls the overhead wire. Moreover, since a cable can be made unnecessary to pull up the overhead wire, an operation for attaching the cable to the overhead wire and a work for removing the cable from the overhead wire can be made unnecessary. Furthermore, since the overhead wire is not removed from all the hooks of the bindless insulator, the danger of the overhead wire falling off the bindless insulator and falling can be avoided.

  In particular, according to the second aspect of the invention, the engaging member is swung around the shaft portion, and the claw portion is restricted from rotating in one direction with respect to the gear teeth. By engaging, for example, when rotating the rotating shaft and thus the disk to stretch the overhead wire, it is possible to restrict the rotation of the disk in the direction of loosening the overhead wire, and the engaging member By swinging around the shaft portion, and engaging the claw portion with the gear teeth so as to restrict the rotation shaft from rotating in the direction opposite to the above, for example, the rotation shaft and thus the disk, When rotating to loosen the overhead wire, it is possible to restrict the rotation of the disk in the direction in which the overhead wire is stretched, so that the safety of the work can be improved. Then, the rotation direction of the disk by the rotation direction restriction mechanism can also be switched simply by changing the engagement between the claw portion of the engagement member and the gear teeth by swinging the engagement member in the required direction. Can do.

  In particular, according to the third aspect of the present invention, the rotation transmission rod of a tool such as a ratchet wrench is mounted in the mounting hole of the rotation shaft, and the tool such as the ratchet wrench is transferred from the rotation transmission rod to the rotation shaft. Just by operating so that rotation is transmitted, the overhead wire spanned on the circumferential surface of the disc moves according to the rotation direction of the disc of the rotary hook, so the operator pulls the overhead wire with the force of the worker Instead, the overhead wire can be mechanically pulled in a required direction, so that the work can be simplified and the safety can be improved.

  In particular, according to the fourth aspect of the present invention, the overhead wire can be more securely hooked to the bindless insulator by holding the overhead wire between the rotary hook and the pressing member. Moreover, when maintaining the state where it is hung on the circumferential surface of the disk of the rotary hooking part while removing it from the other hooking part, the pressing part holds down so that the movement of the overhead wire is not restricted. By bringing the portion close to the rotation hook portion, the pressing portion serves as a guide, and it is possible to suppress the overhead wire from being detached from the rotation hook portion.

  In particular, according to the invention described in claim 5, when the overhead wire is a twisted wire such as a DV electric wire, the twisted portion of the overhead wire is unexpected when the disk is rotated in order to adjust the tension of the overhead wire. If it becomes impossible to pull the overhead wire, it is possible to release the hook of the twisted part of the overhead wire by rotating the part side other than the tip of the insulator main body. Can improve efficiency and speed.

  According to the invention described in claim 6, since the overhead wire spanned on the circumferential surface of the disk can be moved in accordance with the rotation direction of the disk of the rotary hooking portion, the worker does not pull the overhead wire manually. In both cases, the overhead wire can be mechanically pulled in the required direction, so that the worker does not need a large force when pulling the overhead wire, and the worker is not forced to pull the overhead wire. Further, according to the invention described in claim 6, since the cable is not used to pull up the overhead wire, in order to securely attach the cable to the overhead wire, the process of winding the tape around the DV electric wire and the cable and the removal of the cable from the overhead wire. The process of stripping the tape becomes unnecessary.

FIG. 1 is an explanatory view showing a configuration of a bindless insulator according to the present invention, FIG. 1 (a) is a side view of the bindless insulator, FIG. 1 (b) is a plan view of the bindless insulator, FIG.1 (c) is sectional drawing which shows the insulator main body of the said bindless insulator, its front-end | tip part, and the connection part which this front-end | tip part has. Figure 2 shows a DV wire routed around the rotary hook part and the normal hook part of the bindless insulator, attaching an insulator attachment to the tip, and further attaching the insulator attachment to a metal fitting provided on an arm metal or the like. It is explanatory drawing which shows the state. FIG. 3A is an explanatory view showing an operation of pulling the DV electric wire in a state where the DV electric wire is hooked on the rotary hooking portion and removed from the other hooking portion in order to make the DV electric wire stretched. FIG. 3B is an enlarged view showing a state in which the disc is restricted to rotate only in the counterclockwise direction by the claw portion of the engaging member of the rotation direction restricting mechanism. FIG. 4 (a) is an explanatory view showing an operation of pulling the DV electric wire in a state where the DV electric wire is hooked on the rotary hooking portion and detached from the other hooking portion in order to loosen the DV electric wire. b) is an enlarged view showing a state in which the disc is restricted to rotate only in the clockwise direction by the claw portion of the engaging member of the rotation direction restricting mechanism. FIG. 5 is an explanatory view showing a process of mounting the rotation transmission rod of the ratchet wrench in the mounting hole of the rotating shaft. FIG. 6 is an explanatory view showing a configuration of a conventional bindless insulator for a large-diameter DV electric wire and a state in which the DV electric wire is drawn around a protrusion of the bindless insulator.

  Embodiments of the present invention will be described below with reference to the drawings.

1 to 5, an example of an embodiment of a bindless insulator 1 according to the present invention is shown. This bindless insulator 1 corresponds to, for example, a large-diameter DV electric wire 2 having a nominal cross-sectional area exceeding 14 mm ² , particularly a larger-diameter DV electric wire 2 having nominal cross-sectional areas of 38 mm ² and 60 mm ² . The DV electric wire 2 is a stranded wire formed by twisting a plurality of electric wires, although it is illustrated in a simplified manner in FIGS.

  The bindless insulator 1 is formed of a material such as synthetic resin, for example, and includes an insulator body 3 having a thin substantially rectangular parallelepiped block portion 31 having flat side surfaces 31a and 31b facing each other, and the insulator body 3 The hook portions 4 and 5 projecting from the side surfaces 31a and 31b at the one end side in the longitudinal direction of the block portion 31, and from the side surfaces 31a and 31b at the substantially central portion in the longitudinal direction of the block portion 31 of the insulator body 3. It has protruding hooks 6 and 7.

  As shown in FIG. 1B, these hooks 4, 5, 6, 7 are composed of heads 4a, 5a, 6a, 7a and pillars 4b, 5b, 6b, 7b. And is integrally formed with the block portion 31 of the insulator body 3. In this embodiment, the hooking portions 4, 5, 6, and 7 are symmetrical with respect to the hooking portion 4 and the hooking portion 5, and the hooking portion 6 and the hooking portion 7 from both the side surfaces 31a and 31b. However, only the hooking portions 4 and 6 arranged on the side surface 31a side of one side, or only the hooking portions 5 and 7 arranged on the side surface 31b side of the one side may be used.

  The bindless insulator 1 has a rotary hook portion 9 in the block portion 31 of the lever main body 3 in the vicinity of the end opposite to the end on the side having the hook portion 5 in the longitudinal direction of the block portion 31. have. In this embodiment, the rotary hooking portion 9 is composed of a rotary shaft 91 and two disks 92 and 93 disposed on both ends of the rotary shaft 91 in the longitudinal direction.

  Among these, the rotating shaft 91 is rotatably mounted while penetrating the block portion 31, one end portion in the longitudinal direction of the rotating shaft 91 protrudes from the side surface 31 a, and the other end portion in the longitudinal direction of the rotating shaft 91 is It protrudes from the side surface 31b. On the side having the rotation center of the rotation shaft 91, a mounting hole 94 is formed in which a rod 171 for rotation transmission of a ratchet wrench 17 described later can be mounted. In this embodiment, the opening shape of the mounting hole 93 is a hexagonal shape, but is not necessarily limited thereto, and may be a triangular shape, a quadrangular shape, a pentagonal shape, or the like. The mounting hole 93 may be opened only on the side surface 31 a side of the rotating shaft 91, or may be opened on both the side surface 31 a side and the side surface 31 b side of the rotating shaft 91.

Disc 92 and 93, for example, a nominal cross-sectional area 38mm ^2, 60 mm equal to or more also ² of diameter of DV wire 2 as it has a large thickness slightly disc 92 on the side surface 31a side of the block portion 31 The disc 93 is arranged on the side surface 31 b side of the block portion 31. As the anti-slip of the DV electric wire 2, the discs 92, 93 rotate together with the DV wires 2 when the discs 92, 93 rotate with the DV electric wires 2 in contact with the circumferential surfaces of the discs 92, 93. For example, a plurality of triangular protrusions are formed side by side in the circumferential direction of 92 and 93.

  The disc 92 is not close to the side surface 31a, and is necessary so that the gear 101 constituting the rotation direction regulating mechanism 10 described later can be appropriately arranged between the disc 92 and the side surface 31a. Are attached to the rotary shaft 91 with an interval of. In this embodiment, the disc 93 is not close to the side surface 31b, and is attached to the rotary shaft 91 at the same interval as the disc 92 with respect to the side surface 31b. But the disc 93 is not limited to this structure, You may be attached to the rotating shaft 91 in the position close | similar to the side surface 31b.

  Further, the rotation hook 9 may be configured such that, for example, the rotation shaft 91 protrudes only on the side surface 31 a side of the block portion 31, and the disk 92 is attached to the rotation shaft 91.

  Further, in this embodiment, the bindless insulator 1 has the rotation direction restricting mechanism 10 on the side surface 31a side of the block portion 31 of the insulator body 3. In this embodiment, the rotation direction restricting mechanism 10 is a side surface of the block portion 31 by a gear 101 attached to a rotating shaft 91 and a shaft portion 103 as shown in FIGS. 3B and 4B. The engaging member 102 is swingably attached to 31a.

  Among these, the gear 101 is fixed to the rotary shaft 91 and rotates integrally with the rotary shaft 91, and has a plurality of trapezoidal teeth. The engaging member 102 is a plate-shaped member having two claw portions 102a and 102b, and the claw portion 102a approaches the gear 101 around the shaft portion 103 (FIGS. 3B and 4B). ) In a counterclockwise direction) or tilt in a direction in which the claw portion 102b approaches the gear 101 (clockwise direction in FIGS. 3 and 4).

  Accordingly, as shown in FIG. 3B, when the engaging member 102 is tilted so that the claw portion 102a meshes with the teeth of the gear 101, the counterclockwise direction indicated by the arrow in FIG. The rotation of the gear 101 in the clockwise direction (direction in which the DV electric wire 2 is loosened) is restricted while the rotation of the gear 101 in the direction (the direction in which the DV electric wire 2 is stretched) is allowed. Further, as shown in FIG. 4B, when the engaging member 102 is tilted so that the claw portion 102b meshes with the teeth of the gear 101, the clockwise direction (DV) indicated by the arrow in FIG. On the contrary, the rotation of the gear 101 in the counterclockwise direction (the direction in which the DV electric wire 2 is stretched) is restricted while allowing the rotation of the gear 101 in the direction in which the electric wire 2 is loosened.

  Furthermore, the insulator body 3 of the bindless insulator 1 includes a columnar portion 32 connected to the block portion 31. The columnar portion 32 protrudes from the end portion of the block portion 31 having the rotation hooking portion 9 along the longitudinal direction of the block portion 31, and the pressing member 12 is covered and the insulator mounting tool 13 is A through hole 14 to be mounted is formed. In this embodiment, the through-hole 14 is a long hole so that the arc-shaped portion of the lead-in wire retaining device 16 is attached.

  In this embodiment, the columnar portion 32 includes a base portion 321 formed integrally with the block portion 31 and a tip portion 322 located on the opposite side of the block portion 31 with respect to the base portion 321. And the base 321 and the front-end | tip part 322 are connected with the connection mechanism 15 so that rotation is relatively possible.

  The entire base part 321 or a part of the base part 321 has a cylindrical shape with a perfect cross section, and the pressing member 12 is covered with the cylindrical part. Then, by rotating the pressing member 12, it is possible to displace the pressing member 12 in the form of moving away from the rotary hook 9. Further, the through-hole 14 in which the insulator mounting tool 13 is mounted is disposed at the distal end portion 322.

  For example, as illustrated in FIG. 1C, the coupling mechanism 15 includes a shaft rod 151 that extends toward the base 321 on the base 321 side of the tip 322 and has a spherical portion at the head, and a tip 322 of the base 321. An insertion hole 152 that opens to the side and into which the shaft 151 is rotatably inserted is configured.

Next, the state in which a nominal cross-sectional area for example to the structure of the bound-less insulator 1 is bridged electric pole with arm-(not shown.) Was attached DV wires 2 of 38mm ^2, 60 mm ^2, This will be described with reference to FIG.

  The bindless insulator 1 is adapted to be attached to the lead-in wire retainer 16 and eventually to the brace via the insulator attachment 13. The lead-in wire retainer 16 is a well-known device and has, for example, a shade shape or a fan shape having a plurality of through-holes 161 attached thereto, and is fixed to, for example, both ends in the longitudinal direction of the brace. The insulator attachment 13 is also a well-known one, for example, has an 8-shaped shape, is formed into an 8-shaped shape by bending one linear member over a plurality, and one side is attached to the lead-in wire retainer 16. While being attached to the hole 161, the other side is attached to the through hole 14 of the bindless insulator 1.

  Then, for the bindless insulator 1 that is attached to the armor via the lead wire retaining device 16 and the insulator attachment 13, the hooks 4 and 6 of the bindless insulator 1 and the discs of the rotary hook 9 92 or the hooks 5 and 7 of the bindless insulator 1, the disc 93 or both of the hooks 9 and the DV wire 2 are appropriately passed over them, and then the presser member 12 is rotated to rotate the presser member 12 and the disc. By sandwiching the DV electric wire 2 between 92 and 93, as shown in FIG. 2, the DV electric wire 2 is hooked to the bindless insulator 1 and is thus indirectly attached to the armrest.

  On the other hand, as shown in FIG. 2, the DV electric wire 2 is temporarily passed over the circular plates 92 of the hooking portions 4 and 6 and the rotary hooking portion 9, for example, so that the DV electric wire 2 is connected to the circular plate 92 and the pressing member 12. A case where the DV electric wire 2 is further stretched or the DV electric wire 2 is loosened will be described with reference to FIGS. 3 and 4.

  In order to make the DV electric wire 2 more tensioned, as shown in FIG. 3A, the DV electric wire 2 is detached from the hooking portions 4 and 6 and hung only on the disk 92 of the rotary hooking portion 9. The engagement member 102 is swung so that the claw portion 102a of the engagement member 102 is engaged with the teeth of the gear 101 while being in the handed state. In this case, the holding member 12 is displaced to the disc 92 side, and a passage larger than the diameter dimension of the DV electric wire 2 is formed between the holding member 12 and the disc 92 for guiding the DV electric wire 2. Also good. Then, as shown in FIG. 3A, the DV electric wire 2 is in a state of hanging downward from between the pressing member 12 and the circular plate 92. Thereby, by rotating the rotating shaft 91 counterclockwise as indicated by the arrow in FIG. 3B, the DV electric wire 2 moves in the direction of the white arrow in FIG. It can be in a stretched state.

  On the other hand, in order to loosen the DV electric wire 2 from the stretched state, as shown in FIG. 4A, the DV electric wire 2 is removed from the hooking portions 4 and 6 and the disc 92 of the rotary hooking portion 9 is removed. The engagement member 102 is swung so that the claw portion 102b of the engagement member 102 meshes with the teeth of the gear 101. Also in this case, the pressing member 12 may be displaced toward the disc 92 to form the passage for guiding between the pressing member 12 and the disc 92. And the DV electric wire 2 is made into the state which hangs down from between the pressing member 12 and the disc 92 as FIG. 4A shows. Thus, by rotating the rotating shaft 91 in the clockwise direction indicated by the arrow in FIG. 4B, the DV electric wire 2 moves in the direction of the white arrow in FIG. 4A, so that the DV electric wire 2 is stretched. Can relax.

  Then, in order to rotate the rotating shaft 91 counterclockwise as indicated by the arrow in FIG. 3B or clockwise as indicated by the arrow in FIG. 4B, as shown in FIG. Then, the rotation transmitting rod 171 of the ratchet wrench 17 is inserted into the mounting hole 94 of the rotating shaft 91, and the ratchet wrench 17 may be operated so that the rotation transmitting rod 171 rotates in a required direction.

  On the other hand, since the DV electric wire 2 is a stranded wire, when the DV electric wire 2 is further stretched as shown in FIG. 3 or loosened from the tensioned state as shown in FIG. As shown in FIG. 2, when the hooks 4, 6, 9 are hooked, the twisted portion of the DV electric wire 2 may be hooked on an unscheduled portion. By rotating the columnar portion 32 of the insulator body 3 of the insulator 1 on the base 321 side, that is, on the portion other than the distal end 322 clockwise or counterclockwise around the shaft rod 151 of the coupling mechanism 15 as a center of rotation, The catch at the unscheduled portion of the twisted portion of 2 can be released.

  Finally, although not shown, instead of the hooks 6 and 7, a rotary hook with the same configuration as the rotary hook 9 may be used.

1 Bindless insulator 2 DV electric wire (overhead wire)
3 Insulator body 31 Block portion 31a Side surface 31b Side surface 32 Columnar portion 321 Base portion 322 Tip portion 4 Hook (other hooks)
5 Hook (other hooks)
6 Hook (other hooks)
7 Hook (other hooks)
DESCRIPTION OF SYMBOLS 9 Rotation hook part 91 Rotating shaft 92 Disk 93 Disk 94 Attachment hole 10 Rotation direction control mechanism 101 Gear wheel 102 Engaging member 103 Shaft part 12 Holding member 13 Insulator attachment tool 14 Through-hole 15 Connection mechanism 151 Shaft bar 152 Insertion hole 16 Metal fitting 161 Mounting hole 17 Ratchet wrench (tool)
171 Rotating transmission rod (rod)

Claims (6)

Made of insulating material,
A polyhedral block-shaped lever body having a through-hole to which a lever mounting tool can be mounted, and a plurality of hook portions that can be hooked by protruding from a required surface of the lever body;
At least one of the plurality of hooks includes a rotating shaft rotatably attached to the insulator body and a disk that rotates integrally with the rotating shaft. The circumferential surface is a rotation hook portion formed with anti-slip means for preventing the overhead wire in contact with the circumferential surface from slipping when the disk rotates, and
A bindless insulator having a rotation direction restricting mechanism for restricting rotation of the rotating shaft in only one direction. The rotation direction regulating mechanism is
A gear that rotates integrally with the rotary shaft, and an engaging member that is swingably attached to a required surface of the insulator body via a shaft body;
2. A claw portion formed on the engaging member swings about the shaft body to engage and release the gear teeth and the engaging member. Bindless eggplant described in.   The bindless insulator according to claim 1 or 2, wherein a mounting hole for mounting a rod for transmitting rotation is formed at a rotation center of the rotating shaft.   4. A pressing member that displaces in a direction toward and away from the rotary hooking portion is disposed closer to the end than the rotary hooking portion of the lever main body. The bindless eggplant described.   The through hole in which the lever attachment can be mounted is disposed on the most distal end side of the lever main body, and the distal end portion having the through hole of the lever main body is relatively relative to other parts of the lever main body. The bindless insulator according to any one of claims 1 to 4, wherein the bindless insulator is rotatably connected. A method for adjusting the tension of the overhead wire using the bindless insulator according to any one of claims 1 to 5,
Maintaining the state where the overhead wire is stretched over the circumferential surface of the disk of the rotary hooking portion of the plurality of hooking portions, and removing from the other hooking portions;
A step of restricting the rotation axis to rotate only in a required direction by the rotation direction restriction mechanism;
A method of adjusting the tension of the overhead wire, comprising: rotating the rotating shaft in a required direction to rotate the disk to pull the overhead wire in the required direction.

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