JP2020014277A - Wire inspection device - Google Patents

Abstract

To provide a wire inspection device that can be easily attached to an electric wire.SOLUTION: A wire inspection device 1 includes a case 5 that is movable in a longitudinal direction of an electric wire 10, an inspection unit 3 that is rotatably supported inside the case 5, rotated along an outer periphery of the electric wire 10, and inspects a state of the electric wire 10, and inspection unit driving means 4. The case 5 includes a notch 59 cut out from an outer surface of the case 5 toward a rotation center of the inspection unit 3. The inspection unit 3 includes notches 83a, 85a, 9a cut out from an outer edge of the inspection unit 3 toward the rotation center. The electric wire 10 is passed through the notches 59, 83a, 85a, 9a and positioned from the outside of the case 5 to the center of rotation of the inspection unit 3, so that the case 5 is hung on the electric wire 10 and the wire inspection device 1 is attached to the electric wire 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electric wire inspection device that automatically inspects the state of an electric wire.

  2. Description of the Related Art In recent years, wire inspection devices for automatically inspecting the state of overhead wires have been developed, and various wire inspection devices have been invented. As one example, Patent Literature 1 discloses an electric wire for detecting and photographing an abnormal portion such as damage to a metal wire while moving along a transmission line formed by spirally twisting a plurality of metal wires. An inspection device is disclosed.

  The electric wire inspection device of Patent Document 1 described above is provided with a cylindrical gear that allows a transmission line to pass through the inside of the transmission line and rotates along the outer periphery of the transmission line, imaging means attached to the cylindrical gear, and an outer peripheral surface of the cylindrical gear. A gear that meshes with the external teeth, a motor that drives the gear, a cover that houses the motor and the cylindrical gear, a rotation number detector that detects the number of rotations of the cylindrical gear, and a transmission line that includes the transmission gear. And a sensor for detecting contact with an abnormal part. Further, internal teeth are provided on the inner peripheral surface of the cylindrical gear, and the inner teeth are formed by spirally helically grooved portions of the transmission line outer peripheral surface (a plurality of metal wires are helically twisted). Groove).

  The cover part is divided into two parts in the radial direction of the transmission line, and the divided members are connected by hinges. Similarly, the cylindrical gear is also divided into two parts in the radial direction of the transmission line. When such an electric wire inspection device is attached to a transmission line, the cover and the cylindrical gear are opened, and the cover and the cylindrical gear are closed in such a manner that the transmission line is sandwiched between the divided members. In addition, the electric wire inspection device includes a cover member that sandwiches the transmission line and a lock member that prevents the cylindrical gear from being accidentally opened.

  In the electric wire inspection device of Patent Document 1, the gear rotates when the motor is driven, and the external teeth meshing with the gear rotate around the long axis of the transmission line. At the same time, since the rotating internal teeth mesh with the grooves of the transmission line, the entire device spirally moves along the grooves with the rotation of the cylindrical gear. When the cylindrical gear contacts an abnormal part of the transmission line, the photographing means photographs the abnormal part, and the rotation number detecting means detects the rotation number of the cylindrical gear at this time.

JP 2017-99036 A

  The electric wire inspection device of Patent Document 1 described above has a problem in that, when it is attached to a power transmission line, it is necessary to open and close the cover and the cylindrical gear as described above, resulting in poor work efficiency.

  Then, an object of the present invention is to provide an electric wire inspection device which can be easily attached to an electric wire.

  An electric wire inspection device according to the present invention is configured to rotate along the outer periphery of an electric wire, to inspect the state of the electric wire, and to be movable in a longitudinal direction of the electric wire, and rotatably support the inspection portion. A support, and an inspection unit driving means for rotating the inspection unit, wherein the inspection unit is provided with a notch cut out from an outer edge of the inspection unit toward a rotation center. The electric wire is attached to the electric wire by being positioned at the center of rotation of the inspection unit through the notch.

  According to the present invention, the inspection section is provided with the notch cut out from the outer edge of the inspection section toward the center of rotation. Then, the electric wire inspection device is attached to the electric wire by the electric wire passing through the notch and being positioned at the center of rotation of the inspection unit. Thus, according to the present invention, it is possible to provide an electric wire inspection device that can be easily attached to an electric wire.

It is a perspective view showing the state where the electric wire inspection device concerning a 1st embodiment of the present invention was attached to the electric wire. It is a front view of the electric wire inspection apparatus of FIG. FIG. 2 is a perspective view of an inspection unit in FIG. 1. FIG. 2 is a sectional perspective view of the electric wire inspection device of FIG. 1. FIG. 2 is a sectional perspective view of the case of FIG. 1. It is a front view of the electric wire inspection device concerning a 2nd embodiment of the present invention.

  A “wire inspection device” according to a first embodiment of the present invention will be described with reference to FIGS.

  The electric wire inspection device 1 shown in FIG. 1 is a device for automatically inspecting an overhead distribution line 10 for damage or the like. The overhead distribution line 10 is an electric wire bridged from a distribution substation to a power pole, a wire bridged between power poles, and the like. Hereinafter, the overhead distribution line 10 is simply referred to as an “electric line 10”. The electric wire 10 has a core wire and an insulating coating covering the core wire. The electric wire 10 has a substantially perfect circle in cross section taken along a plane perpendicular to the longitudinal direction.

  The electric wire inspection apparatus 1 includes a case 5 (corresponding to a “support”) movable in the longitudinal direction of the electric wire 10, wheels 21 and 22 attached to the case 5 and running on the electric wire 10, and wheel driving means. 7, an inspection unit 3 rotatably supported inside the case 5 and inspecting the state of the electric wire 10, and an inspection unit driving unit 4.

  Case 5 is made of a synthetic resin. As shown in FIG. 1, the case 5 has a rectangular parallelepiped outer shape, and has an upper wall 51, a bottom wall 52, and side walls 53, 54, 55, 56. The side walls 53 and 54 are erected from each of the long sides of the bottom wall 52. The side walls 55 and 56 are erected from each of the short sides of the bottom wall 52. Further, inside the case 5, a partition wall 57 facing the side wall 55 and a partition wall 58 facing the side wall 56 are provided.

  At the center of the partition wall 58, a perfect circular through hole 58h for positioning a cylindrical portion 85 of the inspection unit 3 described later is provided. Further, an arc-shaped groove 58a for positioning a bearing 6 described later of the inspection unit 3 is provided on the outer periphery of the through hole 58h. As shown in FIGS. 1, 4, and 5, the groove 58a is formed to be concave from the surface of the partition wall 58 on the side wall 55 side to the side wall 56 side. The groove 58a is formed in a substantially annular shape, but has a circular arc shape as a result of a part of the groove 58a being cut out by a notch 59 described later. Similarly, the partition wall 57 is provided with an arc-shaped groove 57a.

  As shown in FIG. 1, the case 5 is provided with a notch 59 cut out from an outer surface of the case 5 toward a center of rotation of the inspection unit 3. Specifically, the notch 59 includes a portion 59a in which the bottom wall 52 is cut out in the long side direction, a portion 59b in which the side wall 55 is cut out from the portion 59a toward the upper wall 51, and a portion 59a in which the bottom wall 52 is cut out from the portion 59a. A portion 59c in which the side wall 56 is cut out toward 51, a portion 59d in which the partition wall 57 is cut out from the portion 59a toward the upper wall 51, and a portion 59e in which the partition wall 58 is cut out from the portion 59a toward the upper wall 51. Consisting of The portion 59e extends from the lower end of the partition wall 58 to the through hole 58h.

  The electric wire 10 passes through the notch 59 described above and notches 83 a, 85 a, and 9 a, which will be described later, of the inspection unit 3, and is positioned at the center of rotation of the inspection unit 3 from outside the case 5. Thereby, the electric wire inspection device 1 is attached to the electric wire 10 as shown in FIG.

  The two wheels 21 and 22 are attached to the inner surface of the upper wall 51 of the case 5. Wheels 21 and 22 are arranged at intervals in the longitudinal direction of upper wall 51. These wheels 21 and 22 run on the electric wire 10 in the longitudinal direction of the electric wire 10. In addition, the wheels 21 and 22 have a configuration in which the outer peripheral surface of the rotating cylindrical body comes into contact with the electric wire 10, and the outer peripheral surface is not provided with irregularities that may damage the electric wire 10 (described as the related art). The wire inspection device may damage the wire when the internal teeth of the cylindrical gear mesh with the groove of the wire.)

  The wheel driving means 7 includes a motor 71 mounted on the inner surface of the upper wall 51 of the case 5 and gears 72, 73, 74 for transmitting the power of the motor 71 to the one wheel 21 described above. When the motor 71 is driven in a state where the electric wire inspection device 1 is attached to the electric wire 10 (FIG. 1), the wheel 21 is rotated by the motor 71 and the gears 72, 73, 74, and the wheel 21 runs on the electric wire 10. Although no power source is attached to the other wheel 22, one wheel 21 travels on the electric wire 10 so that the other wheel 22 also travels on the electric wire 10. When the two wheels 21 and 22 run on the electric wire 10 in this manner, the entire electric wire inspection device 1 moves in the longitudinal direction of the electric wire 10.

  As shown in FIG. 3, the inspection unit 3 includes a sensor 11 for inspecting the state of the insulation coating of the electric wire 10, a camera 12 for photographing the outer peripheral surface of the electric wire 10, and a rotating member 8 to which the sensor 11 and the camera 12 are attached. And a gear 9 attached to the rotating member 8 to which power is transmitted from the inspection unit driving means 4 and a bearing 6 for rotating the inspection unit 3 smoothly with a small frictional force.

  The rotating member 8 is made of a synthetic resin. The rotating member 8 includes a pair of opposed plate portions 83 facing each other at an interval, a pair of connecting portions 86a and 86b connecting the pair of opposed plate portions 83, and the one opposed plate portion 83 to the other opposed plate portion. 83 and a cylindrical portion 85 extending to the opposite side.

  The pair of opposing plate portions 83 is formed in a circular plate shape. Each opposing plate portion 83 is provided with a notch 83a which is cut out from the outer edge to the center.

  The pair of connecting portions 86a and 86b are formed in a rectangular plate shape. The electric wire 10 is positioned between the pair of connecting portions 86a and 86b. The above-described sensor 11 and camera 12 are attached to each of the connecting portions 86a and 86b.

  The cylindrical portion 85 is provided coaxially with the opposing plate portion 83. The cylindrical portion 85 is located in the through hole 58h. The center of the opposing plate portion 83 and the center of the cylindrical portion 85 form the rotation center of the inspection section 3.

  The gear 9 is attached to the tip of the cylindrical portion 85. The gear 9 is formed in an annular shape, and has an outer diameter and an inner diameter equal to the outer diameter and the inner diameter of the cylindrical portion 85, and is arranged coaxially with the cylindrical portion 85. A plurality of teeth 93 are provided on the outer peripheral surface of the gear 9.

  An electric wire 10 is passed through the center of the pair of opposed plate portions 83 (that is, inside the notch 83 a), the inside of the cylindrical portion 85, and the inside of the gear 9. The cylindrical portion 85 and the gear 9 are provided with notches 85a and 9a cut out from the outer edge toward the center. When the inspection unit 3 is viewed from the rotation axis direction, the notches 83a, 85a, and 9a overlap. The electric wire 10 passes through these notches 83a, 85a, 9a and is positioned at the center of rotation of the inspection unit 3.

  The bearing 6 is provided on an outer surface of each of the pair of opposed plate portions 83. Further, a plurality of bearings 6 (four in this example) are provided on each opposing plate portion 83. The bearing 6 is provided rotatably about an axis parallel to the rotation axis of the inspection unit 3. Such a bearing 6 is positioned in the grooves 57a, 58a of the case 5 described above.

  In this example, the bearing 6 is provided on each of the pair of opposing plate portions 83 (both ends in the rotation axis direction in the inspection section 3). It may be provided at one end of the part 3 in the rotation axis direction).

  The inspection unit driving means 4 includes a motor 41 attached to the inner surface of the side wall 54 of the case 5, and gears 42 and 43 for transmitting the power of the motor 41 to the gear 9 described above. When the motor 41 is driven in a state where the electric wire inspection device 1 is attached to the electric wire 10 (FIG. 1), the power of the motor 41 is transmitted to the gear 9 by the gears 42 and 43 and the inspection unit 3 moves along the outer periphery of the electric wire 10. To rotate. That is, the inspection unit 3 rotates around the electric wire 10. At this time, when the bearing 6 rotates while being guided by the grooves 57a, 58a, the inspection unit 3 rotates along an accurate trajectory and smoothly rotates with low friction.

  Further, as described above, since the notch 9 a is provided in the gear 9, the inspection unit 3 does not rotate 360 degrees, rotates about 260 degrees, and alternately rotates forward and backward. repeat. When the inspection unit 3 rotates only in the same direction (360 degrees or more), there is a concern that a cable (not shown) connected to the sensor 11 and the camera 12 may be damaged by twisting. In this example, this is prevented. be able to. As described above, the inspection unit 3 does not rotate by 360 degrees, but the inspection and photographing of the entire circumference of the electric wire 10 can be performed by providing the plurality of sensors 11 and the cameras 12.

  When attaching the electric wire inspection device 1 to the electric wire 10, the inspection unit 3 is previously positioned at a position where the notch 83a overlaps the notch 59, as shown in FIG. Then, the electric wire 10 outside the case 5 passes through the notches 59, 83a, 85a, and 9a as shown by an arrow D1 in FIG. Instead of moving the wire inspection device 1). By positioning the electric wire 10 at the rotation center of the inspection unit 3 in this manner, the case 5 is hung on the electric wire 10 and the electric wire inspection device 1 is attached to the electric wire 10.

  According to such a present example, since the notches 59, 83a, 85a, and 9a described above are provided, the wire inspection device 1 can be easily attached to the overhead distribution line 10. In addition, since the inspection unit 3 can be smoothly rotated by having the bearing 6 and the grooves 57a and 58a in the configuration, the inspection accuracy is improved, the durability of the parts is improved, and energy is saved. be able to.

  An “electric wire inspection device” according to a second embodiment of the present invention will be described with reference to FIG. In FIG. 6, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In the electric wire inspection device 101 shown in FIG. 6, a notch 159 is provided in the case 5 instead of the notch 59 in FIG. The notch 159 extends linearly from the side wall 53 of the case 5 toward the side wall 54, then bends at a right angle, and extends linearly therefrom toward the upper wall 51, that is, the rotation center of the inspection unit 3. ing.

  When attaching the electric wire inspection device 101 to the electric wire 10, the electric wire 10 outside the case 5 is passed through the notches 159, 83a, 85a, 9a as shown by arrows D2 in FIG. Position at the center of motion. By positioning the electric wire 10 at the center of rotation of the inspection unit 3 in this manner, the case 5 is hung on the electric wire 10, and the electric wire inspection device 101 is attached to the electric wire 10.

  Also in this example, since the notches 159, 83a, 85a, and 9a are provided, the wire inspection device 101 can be easily attached to the overhead distribution line 10.

  In the above-described embodiment, the “support” that rotatably supports the inspection unit 3 is the case 5 that can accommodate the inspection unit 3 therein. However, the “support” of the present invention can rotatably support the inspection unit 3, and positions the wire 10 at the rotation center of the inspection unit 3 by passing the electric wire 10 from the outside to the inside of the support. Any configuration may be used as long as it is capable of performing such operations, for example, a configuration including only a skeleton.

  Further, in the above-described embodiment, the wire inspection device used for inspecting the distribution wire having the insulating coating has been described. However, the wire inspection device of the present invention is not limited to the coated wire, but may be a bare wire (a spiral groove on the outer peripheral surface). (Including a stranded wire provided with a.). Furthermore, the electric wire inspection device of the present invention can be used not only for distribution lines but also for inspection of transmission lines.

  Note that the above-described embodiment merely shows a typical embodiment of the present invention, and the present invention is not limited to this embodiment. That is, various modifications can be made without departing from the gist of the present invention. As long as the configuration of the present invention is still provided by such a modification, it is, of course, included in the scope of the present invention.

1,101 Electric wire inspection device 3 Inspection unit 4 Inspection unit driving means 5 Case (support)
9 Gear 9a Notch 10 Electric wire 59,159 Notch 83a, 85a Notch

Claims (5)

An inspection unit that rotates along the outer periphery of the electric wire and inspects a state of the electric wire;
A support that is movable in the longitudinal direction of the electric wire and rotatably supports the inspection unit,
Inspection unit driving means for rotating the inspection unit;
With
The inspection unit is provided with a notch cut out from the outer edge of the inspection unit toward the center of rotation,
The electric wire inspection apparatus, wherein the electric wire is attached to the electric wire by being positioned at a rotation center portion of the inspection unit through the notch. The support is a case capable of housing the inspection unit therein,
A notch is provided in the case,
The electric wire inspection device according to claim 1, wherein the electric wire is attached to the electric wire by being positioned at a rotation center portion of the inspection unit from the outside of the case through the notch. The electric wire inspection device according to claim 2, wherein the notch provided in the case extends linearly from a bottom wall of the case toward a rotation center of the inspection unit. The notch provided in the case extends linearly from an outer surface of the case, then bends at a right angle, and extends linearly toward a rotation center of the inspection unit. Item 3. An electric wire inspection device according to item 2. Bearings are provided at one end or both ends in the rotation axis direction in the inspection unit,
The electric wire inspection device according to any one of claims 1 to 4, wherein the support has an arc-shaped groove for positioning the bearing.

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