JP5566812B2 - Crawler gold wheel with ground plate - Google Patents

Description

  The present invention relates to a crawler metal wheel used for installing an OPGW on a steel tower.

  In recent years, in response to requests to increase the number of optical transmission lines, work to replace an existing overhead ground wire with an optical ground wire (hereinafter referred to as OPGW), or work to replace an existing OPGW for increased centering. Has been implemented. In this erection work, the OPGW is transported to the site with a drum wound on each line, and these OPGWs are erected in a plurality of lines.

  In this erection work, a crawler wheel is attached to each of the upper part of a plurality of steel towers constructed in the erection section. The crawler gold wheel functions as a pulley for transporting the OPGW along the steel tower when the OPGW is installed, and the installed OPGW passes over the plurality of crawler gold wheels.

  This crawler gold wheel is provided with a plurality of frames that can rotate around the outer track frame. The frames are connected endlessly around the track frame, and when the OPGW is transported, the frames are rotated together in the transport direction of the OPGW. That is, this crawler metal wheel can prevent deformation due to the compressive force applied to the OPGW by the function of the top as compared with a general round pulley.

There are two types of crawler wheels, a 1200 mm type and an 800 mm type whose outer shape is smaller than this. FIG. 10 shows a piece 100 used alone in a conventional 1200 mm type crawler wheel.
The top 100 includes a receiving portion 102 on which the transported OPGW 101 is placed, a main body portion 103 that supports the receiving portion 102 from below, and guide rollers 106a and 106b that guide the top 100 along the outer periphery of the track frame described above. It consists of and. The receiving portion 102 is made of an insulating material such as urethane resin so that the passing OPGW 101 is not damaged on the top 100. Such pieces 100 are connected endlessly by a connecting belt 105 of a crawler gold wheel to constitute an endless chain (for example, see Patent Document 1).

  Two grounding plates 104 are attached to the main body 103 of the top 100 on both the front side (front side in FIG. 10) and the rear side (back side in FIG. 10) in the OPGW transport direction. The grounding plate 104 is for releasing the induced current generated by the OPGW 101 to the tower side through the main body 103 (grounding). This induced current is generated, for example, when one line of the two-line power transmission line is stopped in the OPGW replacement work. In particular, in the transmission line of 154 kV or more, the induced current becomes large, and it is necessary to take measures against the induced current in the overhead wire work tool base material. Therefore, it is desirable to add a grounding function to the crawler wheel.

  The ground plate 104 is urged clockwise by a spring member 108 around a rotation shaft 109 attached in a manner penetrating the meat stealing portion 111 of the main body 103. With this structure, the ground plate 104 is always in contact with the OPGW 101.

  The ground plate 104 is provided only in the above-described 1200 mm type crawler metal wheel, and there is no small 800 mm type crawler metal wheel provided with the ground plate 104. In this 800 mm type, a grounding roller is provided in the vicinity of the gold wheel of each steel tower, and the OPGW is grounded through the grounding roller.

  On the other hand, the receiving portion 102 is provided with two grooves (OPGW groove 102a and wire clamping groove 102b) in which OPGW is accommodated. As shown in FIG. 10, the OPGW 101 on the top 100 enters the OPGW groove 102a. On the other hand, the extension clamp 107 (described by a two-dot chain line in FIG. 10) that connects the end portions of the OPGW 101 is placed on the extension clamp groove 102b. Since the diameter of the wire clamp 107 is larger than the diameter of the OPGW 101, the wire clamp 107 is not accommodated in the OPGW groove 102a, and rides on the wire clamp groove 102b positioned above the groove 102a.

  In addition, the top 100 is provided with arm portions 110 extending obliquely upward on both sides in a manner sandwiching the two grooves 102a and 102b. More specifically, the arm part 110 includes an arm part 103 c formed on the main body part 102 and an arm part 102 c formed on the receiving part 102. The length of the arm 110 is such that the OPGW 101 is guided to the groove 102a even if the OPGW 101 is swung to the left and right to some extent with respect to the center of the groove 102a. Both the 800 and 1200 mm types have the same predetermined length. It has a length.

JP-A-8-47128

The crawler wheel is installed by lifting from the bottom of the tower to the top during construction work. Therefore, in order to reduce this installation work, an 800 mm type crawler metal wheel that is reduced in size and weight is desired. However, in the small 800 mm type, as described above, there is no structure in which the ground plane is provided to ground the OPGW.
On the other hand, applying the above-mentioned 1200 mm type frame 100 to an 800 mm type frame cannot be applied as it is because the size of the frame structure by the ground plate 104 is different and the structure of the main body 103 is different.
Further, as a conventional grounding method in which no grounding plate is provided, there is a method in which a grounding roller is attached to the OPGW near the gold wheel of each steel tower for grounding. However, there are cases where the grounding becomes insufficient due to vibrations when passing through the OPGW. In addition, since it is necessary to prepare a grounding roller separately, the number of materials to be transported increases and the transportation work becomes difficult. Therefore, a crawler gold wheel having a ground function is desired.

  Further, the above-mentioned 1200 mm type top 100 has a structure in which the ground plate 104 does not move to the position of the extension clamp 107 when the OPGW extension clamp 107 is on the extension clamp groove 102b of the receiving portion 102. there were. Therefore, when the wire clamp 107 passes, it cannot be grounded.

  The present invention has been made in view of the above-described circumstances, and it is an object of the present invention to provide a crawler metal wheel having a ground plate with a large movable range and reduced in size and weight.

In order to solve the above-described problems, the present invention includes a plurality of pieces that can rotate along the circumference of the track frame, and the pieces extend obliquely on both sides of the groove that supports the OPGW. And an arm portion that guides the OPGW to the groove. The groove and the arm portion are formed of an insulating material that is interposed between the main body portion constituting the main body of the top and the main body portion and the OPGW. A crawler gold wheel provided with a grounding plate that is urged by a spring member and is movable toward the OPGW so as to come into contact with the OPGW. The groove includes an OPGW groove in which the OPGW is accommodated and an extension clamp groove in which an extension clamp that connects the OPGW is accommodated, and the extension extends above the OPGW groove. Position for wire clamping groove The grounding plate is a cantilevered grounding plate provided on either the front side or the rear side in the installation direction of the OPGW so as to rotate about a rotation shaft, and the outer periphery of the grounding plate A convex portion for contacting the OPGW and a concave portion for contacting the wire extension clamp are formed on the portion, and the convex portion is located on the rotating shaft side with respect to the concave portion. In addition, on both sides of the main body portion, there is a constricted portion that is recessed toward the center of the top on the lower side of the arm portion, and a meat stealer that penetrates in the installation direction of the OPGW below the constricted portion. The body portion is formed with a blind hole into which the rotation shaft is inserted on the inner side of the frame than the meat stealer .

  Further, a meat burglar is formed on the main body, and the pivot shaft can be arranged on the inner side of the top than the meat burglar.

Furthermore, a meat theft is formed on the main body, and the ground plate has a portion that abuts against the side wall of the meat theft and regulates a rotation range of the ground plate, and a portion that contacts the side wall of the meat theft. A limit bar covered with an insulating material may be provided.

  A first frame having the ground plate attached to a front surface of the main body; and a second frame having the ground plate attached to a rear surface of the main body and configured differently from the first frame. The number of the first frame and the second frame arranged on the track frame may be substantially equal.

Furthermore, a first frame in which the grounding plate is attached to the front surface of the main body, and a second frame in which the grounding plate is attached to the rear surface of the main body and configured differently from the first frame is provided. may be arranged alternately said first frame and said second frame on the track frame.

In the crawler metal wheel according to the present invention, since the grounding plate is provided on either the front side or the rear side in the installation direction of the OPGW, the grounding plate is provided as compared with the case where the grounding plate is provided on both sides. Since the space for one side becomes unnecessary, the frame can be reduced in size and weight by filling this space. Therefore, the track frame on which the downsized pieces are arranged can be made small, so that the crawler wheel can be reduced in size and weight as a whole.
Further, in the crawler wheel according to the present invention, when the OPGW is on the top, the OPGW contacts with the convex portion, whereas when the extension clamp is on the top, the extension clamp is concave. Contact at the part. By changing the contact portion in this way, the ground plate and the OPGW or the wire clamp are securely in contact with the position where the ground plate is rotated, so that it is not affected by vibrations when the OPGW passes. The OPGW and the wire clamp can be securely grounded.

It is a front view of the crawler gold wheel concerning an embodiment of the invention. It is a side view of FIG. It is the front view which showed the top | frame used for the crawler money wheel of FIG. FIG. 4 is a front view of the frame shown in FIG. 3 in a state in which an OPGW is riding. FIG. 4 is a front view of the frame shown in FIG. 3 in a state where an extension wire clamp of OPGW is on. FIG. 4 is a side view of FIG. 3. It is a front view which shows a ground plate alone. It is a front view which shows the state which attached the crawler metal wheel to the steel tower arm. It is a side view of FIG. It is a schematic diagram which shows the top used for the conventional crawler gold wheel alone.

  Hereinafter, a crawler metal wheel according to an embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 1 is a front view of the crawler gold wheel 50, and FIG. 2 is a side view thereof, with the support member 54 omitted.
The crawler wheel 50 includes an endless chain 52 in which a plurality of pieces 51 (51a, 51b) are connected endlessly by a connecting belt 55, a metal track frame 53 that circulates the endless chain 52 around the outer periphery, And a metal support member 54 for supporting the track frame 53 on the steel tower 11. Note that the OPGW 20 wound on the top 51 is transported in the transport direction (construction direction) A in FIG. 1, and the top 51 rotates in the rotation direction B according to the transport direction A. It has become.

As shown in FIG. 1, the track frame 53 has a substantially scalloped shape when viewed from the front, and has a shape that reduces the bending load acting on the OPGW 20. The track frame 53 has side walls 56 that cover both side surfaces of the endless chain 52. FIG. 1 shows a part of the endless chain 52 by cutting out a part of the side wall 56.
Further, as shown in FIG. 2, horizontal rollers 80 are provided on both sides of the frames 51a and 51b. The horizontal axis roller 80 travels on the track portion 57 on both sides of the outer peripheral surface of the track frame 53. On the other hand, a vertical axis roller 81 is provided at the center of the tops 51a and 51b. The longitudinal roller 81 travels in the central recess 58 on the outer peripheral surface of the track frame 53. The top 51 is guided on the track frame 53 by these rollers 80 and 81.

FIG. 3 is a front view showing the frame 51a shown in FIGS. 1 and 2 as a single unit. 4 is a front view showing a state in which the OPGW is riding on the frame of FIG. 3, and FIG. 5 is a front view showing a state in which the extension wire clamp of the OPGW is riding. FIG. 6 is a side view of FIG.
Although details will be described later, the tops 51a and 51b of the present embodiment have a different structure. Therefore, in the following description, only the configuration of the frame 51a will be described, and only the portion of the frame 51b that is different from the right will be described.

  As shown in FIG. 3, the top 51 a includes a groove 45 located at the center of the front surface and an arm portion 47 extending obliquely upward from both the left and right sides of the groove 45. The groove 45 includes two OPGW grooves 45a (see FIG. 4) in which the OPGW 20 is accommodated and an extension clamp groove 45b (see FIG. 5) in which the extension clamp 63 that connects the OPGW 20 is accommodated. ing. The diameter of the wire clamp 63 is larger than the diameter of the OPGW 20. Therefore, the wire clamp 63 is not housed in the OPGW groove 45a, but is housed in the wire clamp groove 45b positioned above the groove 45a.

The groove 45 and the arm portion 47 are configured by assembling a receiving portion 60 with which the OPGW 20 and the wire extension clamp 63 are in contact, and a main body portion 70 that supports the receiving portion 60 from below.
The arm portion 47 has a function of guiding the OPGW 20 and the extension wire clamp 63 so that they fit within the grooves 45a and 45b when the OPGW 20 and the extension wire clamp 63 placed on the top 51a swing left and right. doing. For this reason, the length of the arm portion 47 is ensured to be necessary for guiding in consideration of this deflection.

Further, the top 51 a is provided with a horizontal axis roller 80 and a vertical axis roller 81 attached to the main body part 70, and a grounding plate 90 attached to the front surface of the main body part 70.
These horizontal axis roller 80 and vertical axis roller 81 are made of metal and have conductivity.
The main body 70 and the ground plate 90 are made of aluminum or an aluminum alloy, and similarly have conductivity. That is, when the ground plate 90 is in contact with the OPGW 20 or the wire clamp 63, the induced current on the OPGW 20 side flows from the ground plate 90 to the main body 70, the rollers 80 and 81, the track frame 53, and the support member 54 in this order. Is grounded to the tower 11 side.

The receiving part 60 is made of an insulating material such as urethane resin. As shown in FIG. 3, the receiving portion 60 is provided with a groove 60 a for forming the groove 45 and an arm portion 60 b for forming the arm portion 47.
The groove 60a has a substantially U shape, and this U shape forms the OPGW groove 45a. As shown in FIG. 4, the OPGW groove 45a is formed in a size that allows the outer periphery of the OPGW 20 to be accommodated.

  Moreover, the arm part 60b mentioned above is extended diagonally upward from the upper part of the both sides of this U shape. The base end portion 60c of the arm portion 60b is connected to the upper portion of the U shape of the groove 60a by a gentle curve. The wire clamping groove 45b is formed by the curved shape of the base end portion 60c. As shown in FIG. 5, the wire clamp groove 45b is formed in a substantially arc shape so that the outer periphery of the wire clamp 63 used for connecting the two OPGWs can be stably accommodated. Yes.

  As shown in FIG. 3, the main body 70 has a receiving portion 60 attached to the entire upper portion thereof, and a horizontal axis roller 80 and a vertical axis roller 81 attached to the lower portion thereof.

The main body portion 70 is formed according to the shape of the groove 60a of the receiving portion 60 described above and the shape of the arm portion 60b of the receiving portion 60, and is obliquely formed from the upper portions on both sides of the groove 70a. And an arm portion 70b extending upward.
Further, on both sides of the main body portion 70, constricted portions 70c are formed so as to pass through the main body portion 70 from both sides toward the center at positions below the two arm portions 70b.
Further, under the constricted portions 70c on both sides, there are provided substantially triangular shaped meat stealing portions 70d formed so as to penetrate from the front side to the back side in FIG.

The constricted portion 70c is formed to reduce the weight of the top 51a. The length of the arm portion 60b of the receiving portion 60 (the arm portion 70b of the main body portion 70) is equal to the length described in the related art (see FIG. 10) in order to correspond to the swing of the OPGW 20 as described above. It is necessary to ensure. Therefore, the constricted portion 70c is provided within a range in which the main body portion 70 can ensure the required strength, and the top 51a is reduced in size and weight.
In addition, the meat stealing portion 70d is also provided within a range that can ensure the necessary strength for the main body portion 70, thereby reducing the weight of the top 51a.

As shown in FIG. 3, the ground plate 90 is obtained by processing a flat plate shape into a substantially elliptical shape (substantially tree leaf shape) when viewed from the front.
The ground plate 90 is attached only to the front side of the front surface of the top 51a. FIG. 3 is a view of the top 51a as viewed from the front, but the other top 51b has a grounding plate 90 attached to the back side, and has a so-called wrong structure. The top 51a and the top 51b differ only in the attachment position of this grounding plate 90, and all the other structures are the same.

As shown in FIG. 3, the ground plate 90 is provided with a rotation shaft 91 at an oval right side portion. On the other hand, as shown in FIGS. 3 and 5, the main body portion 70 has a mounting hole into which the rotation shaft 91 is inserted at the left side position (the central position of the main body portion 70) of the right meat stealing portion 70 d. 71 is formed. By attaching the rotation shaft 91 to the attachment hole 71, the ground plate 90 can rotate about the rotation shaft 91.
The rotating shaft 91 may be attached to the ground plate 90 with a fastening member such as a bolt, or may be provided integrally with the ground plate 90.

  Further, a spring member 92 that urges the grounding plate 90 to rotate clockwise in FIG. 3 is attached to the rotation shaft 91 around the rotation shaft 91. The spring member 92 is a torsion coil spring, and is attached in a state where the rotating shaft 91 is inserted into the coil.

  Further, the ground plate 90 is provided with a limit bar 93 on the right side of the rotation shaft 91 as shown in FIG. The limit bar 93 extends substantially parallel to the rotation shaft 91 and is inserted into the above-described meat stealing portion 70d. When the limit bar 93 comes into contact with the inner wall of the meat stealing portion 70d, the ground plate 90 The rotation range of is controlled. More specifically, as shown in FIG. 3, the meat theft 70d is formed in a triangular shape having a vertex on the inner side of the top 51a, and the OPGW 20 is not on the top 51a (the state shown in FIG. 3). ), The limit bar 93 comes into contact with the lower side of the triangular meat theft 70d, and the upper limit of rotation of the ground plate 90 is restricted. On the other hand, the lower limit of rotation of the ground plate 90 is set to be further lower than the state in which the OPGW 20 is on the top 51a (the state in FIG. 4). In a state where the rotation lower limit is reached, the limit bar 93 is in contact with the upper side of the triangular meat steal 70d. That is, the movable range of the ground plate 90 is determined by the position of the limit bar 93 and the shape of the inner wall of the meat stealing portion 70d.

  The outer peripheral surface of the limit bar 93 is coated with an insulating material. This coating is to prevent an arc from flying between the limit bar 93 and the main body 70 when the limit bar 93 contacts or leaves the inner wall of the meat stealing portion 70d.

As shown in FIG. 3, the ground plate 90 is pushed up by the biasing force of the spring member 92 when the OPGW 20 and the wire clamp 63 are not on the top 51a. When the limit bar 93 comes into contact with the inner wall of the meat stealing portion 70d, the limit bar 93 is raised to the stopped position.
On the other hand, when the OPGW 20 is on the top 51a, as shown in FIG. 4, the ground plate 90 is pushed down to the point where it contacts the outer periphery of the OPGW 20.
Further, in a state where the extension wire clamp 63 of the OPGW 20 is on the top 51a, the ground plate 90 is pushed down to a position where it contacts the outer periphery of the extension wire clamp 63 as shown in FIG.

  The above-described stop position of the ground plate 90 shown in FIG. 3 is a position where the ground plate 90 is rotated to a position higher than the position of the ground plate 90 shown in FIGS. That is, at the position shown in FIGS. 4 and 5, the ground plate 90 is pressed by the urging force of the OPGW 20 or the wire extension clamp 63 and the spring member 92. As a result, the ground plate 90 is always kept in contact with the OPGW 20 or the wire extension clamp 63.

FIG. 7 is a front view showing the ground plate 90 alone.
As shown in FIG. 7, the upper shape formed in the leaf shape of the ground plate 90 is formed with a convex portion 90 a swelled in a gentle convex shape from the right end portion to the left side. In addition, a concave portion 90b that is recessed downward is formed from the end of the convex portion 90a to the left side. Further, a protruding portion 90c that protrudes upward is formed on the left side from the end of the recessed portion 90b. The convex portion 90a, the concave portion 90b, and the protruding portion 90c have an integral curved shape that is gently connected at the terminal end and the starting end. In addition, the lower side shape of the ground plate 90 is formed in the circular arc shape which protrudes toward the lower side, as shown in FIG.

  The convex portion 90a is formed so as to come into contact with the OPGW 20 when the OPGW 20 is on the top 51a (the state shown in FIG. 4). On the other hand, in a state where the wire clamp 63 is on the top 51a (the state shown in FIG. 5), the wire clamp 63 comes into contact with the concave portion 90b or the protrusion 90c of the ground plate 90. By changing the contact portion in this way, the ground plate 90 and the OPGW 20 or the wire extension clamp 63 are reliably in contact with the position where the ground plate 90 is rotated.

  As shown in FIGS. 8 and 9, the crawler wheel 50 configured in this manner is suspended from the arm portion of the steel tower 11 via a suspension member such as a yoke 95 and supports the OPGW 20 being installed. In FIG. 8, the crawler gold wheels 50 are arranged in two rows, but may be arranged in one row or three or more rows according to the use state.

  According to the crawler metal wheel according to the embodiment of the present invention, since the ground plate 90 is provided on either the front side or the rear side in the installation direction A of the OPGW 20, the ground plate 90 is provided on both sides. In comparison, since the space for one side where the ground plate 90 is provided is not required, the tops 51a and 51b can be reduced in size and weight by filling this space. Therefore, the track frame 53 on which the downsized pieces 51a and 51b are arranged can be made small, so that the crawler gold wheel 50 can be reduced in size and weight as a whole.

  The groove 45 includes an OPGW groove 45a in which the OPGW 20 is accommodated and an extension clamp groove 45b in which the extension clamp 63 that connects the OPGW 20 is accommodated. Since the OPGW 20 accommodated in the groove 45a and the wire clamp 63 accommodated in the wire clamp groove 45b and the ground plate 90 are set in a range where they can contact each other, either the OPGW 20 or the wire clamp 63 is the top 51a. , 51b can be grounded via the grounding plate 90. Therefore, compared to a structure in which a grounding roller is attached as in the prior art, the OPGW 20 and the wire extension clamp 63 can be grounded more reliably without being affected by vibration when the OPGW 20 passes.

  Further, the ground plate 90 is configured to rotate about the rotation axis, and the outer peripheral portion of the ground plate 90 is in contact with the convex portion 90 a for contacting the OPGW 20 and the wire extension clamp 63. Since the concave portion 90b or the projection 90c is formed, it is more reliable by making a shape that reliably contacts the OPGW 20 and the extension wire clamp 63 at different positions in accordance with the rotated state of the ground plate 90. The OPGW 20 and the wire clamp 63 can be grounded.

Further, the main body 70 is formed with a meat steal 70d, and the rotation shaft 91 is disposed on the inner side of the tops 51a and 51b with respect to the meat steal 70d, so that the rotation range of the grounding plate 90 is small and compact. can do. As a result, since the tops 51a and 51b can be formed small, the crawler gold wheel 50 can be made small as a whole.
Further, as in the conventional structure, a structure for inserting the rotation shaft using the meat stealing 70d and fixing the rotation shaft on both sides of the frame (in the conventional structure, a grounding plate is provided on both sides of the frame to rotate the rotation shaft). Since the moving shaft is not provided), the structure of the rotating shaft 91 can be simplified. As a result, the rotating shaft 91 and its structure can be reduced in weight.

  Further, the ground plate 90 is provided with a limit bar 93 that abuts against the side wall of the meat stealer 70d to restrict the rotation range of the ground plate 90d and that is in contact with the side wall of the meat stealer 70d. Therefore, by providing the limit bar 93 so that the rotation range of the grounding plate 90 is in contact with the OPGW 20 and the wire extension clamp 63 and the grounding plate 90, the grounding plate 90 can be used to reliably ground. Further, when the limit bar 93 comes into contact with the inner wall of the meat stealer 70d, the generation of an arc between the inner wall and the limit bar 93 can be suppressed. Thereby, it is possible to prevent radio wave interference such as TV broadcasting caused by the arc.

  On the other hand, a first frame 51a in which the grounding plate 90 is attached to the front surface of the main body 70, and a second frame 51b in which the grounding plate 90 is attached to the rear surface of the main body 70 and configured differently from the first frame 51a. Since the number of the first frames 51a and the second frames 51b arranged on the track frame 53 is substantially equal, variation due to the use of the two types of frames 51a and 51b is eliminated, and the OPGW 20 It is possible to prevent a difference in the grounding effect in the wire drawing direction.

  In addition, since the first frame 51a and the second frame 51b are alternately arranged on the track frame 53, the variation due to the use of the two types of frames 51a and 51b is further reduced, and the grounding of the OPGW 20 in the extension direction is reduced. It is possible to prevent further differences in effects.

  Moreover, since the constricted part 70c which dents toward the center of the tops 51a and 51b is formed in the both sides of the main-body part 70 on the lower side of the arm parts 47 and 47, the OPGW20 shakes in the left-right direction. The volume of the main body portion 70 can be reduced while securing the length of the arm portion 47 necessary to cope with it. Thereby, since the tops 51a and 51b can be reduced in weight, the weight of the crawler gold wheel 50 as a whole can be reduced.

The crawler wheel according to the embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various modifications and changes can be made based on the technical idea of the present invention. is there.
For example, in the present embodiment, the ground plate 90 is rotated about the rotation shaft 91. However, if the ground plate 90 is provided on either the front side or the rear side, the ground plate 90 is provided. The movement may be linearly performed.

11 steel tower 20 OPGW
45 groove 45a OPGW groove 45b wire clamping groove 47 arm part 50 crawler wheel 51 (51a, 51b) top 52 endless chain 53 track frame 54 support member 55 connecting belt 56 side wall 57 track part 58 central recess 60 receiving part 60a Groove 60b Arm part 60c Base end part 63 Extension wire clamp 70 Main body part 70a Groove 70b Arm part 70c Constriction part 70d Meat stealing 80 Horizontal axis roller 81 Vertical axis roller 90 Grounding plate 90a Convex part 90b Concave part 90c Projection part 91 Rotation Shaft 92 Spring member 93 Limit bar 95 Yoke 100 Top 101 OPGW
DESCRIPTION OF SYMBOLS 101a OPGW connection part 102 Receiving part 102a OPGW groove | channel 102b Wire extension clamp groove | channel 103 Main body part 104 Grounding plate 105 Connection belt 106a, 106b Guide roller 107 Wire extension clamp 108 Spring member 109 Rotating shaft 110 (102c, 103c) Arm Part 111 Meat stealing part A Transport direction (erection direction)
B Rotation direction

Claims (3)

It has a plurality of frames that can rotate along the circumference of the track frame,
The top includes a groove that supports the OPGW, and an arm portion that extends obliquely on both sides of the groove and guides the OPGW to the groove, and the groove and the arm portion include the main body of the top. It is composed of a main body portion to be configured, and a receiving portion that is interposed between the main body portion and OPGW and is formed of an insulating material.
The main body portion is a crawler gold wheel provided with a grounding plate that is urged by a spring member and formed so as to be movable toward the OPGW so as to come into contact with the OPGW,
The groove is composed of an OPGW groove in which the OPGW is accommodated and an extension clamp groove in which an extension clamp for connecting the OPGW is accommodated, and the extension clamp groove is located above the OPGW groove. The groove is located,
The grounding plate is a cantilevered grounding plate provided on either the front side or the rear side in the erection direction of the OPGW so as to rotate around a rotation axis;
A convex portion for contacting the OPGW and a concave portion for contacting the wire extension clamp are formed on the outer peripheral portion of the ground plate, and the convex portion is rotated more than the concave portion. Located on the shaft side ,
On both sides of the main body, a constricted portion that is recessed toward the center of the frame on the lower side of the arm portion, and a meat stealer that penetrates in the installation direction of the OPGW below the constricted portion is formed. And
A crawler metal wheel in which the main body portion is formed with a blind hole into which the rotating shaft is inserted on the inner side of the top than the meat stealer . The ground plate is provided with a limit bar which is in contact with the side wall of the meat stealer and regulates a rotation range of the ground plate, and a portion which is in contact with the side wall of the meat stealer is covered with an insulating material. The crawler gold wheel according to claim 1 characterized by things. A first frame in which the grounding plate is attached to the front surface of the main body, and a second frame in which the grounding plate is attached to the rear surface of the main body, and is configured differently from the first frame,
The crawler metal wheel according to claim 1 or 2 , wherein the first frame and the second frame are alternately arranged on the track frame.

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