JP2019080442A - Wire tensioning device - Google Patents

Abstract

To provide a wire tensioning device which can keep a fixed working condition even if a wire tensioning direction is different, and which is hard to cause interference with peripheral facilities.SOLUTION: A wire tensioning device 1 is composed of a wire gripping device 2, a slide part 10, and a clamp part 20. The slide part 10 composes a feed screw mechanism by a screw shaft 13 and a base part 11 threadedly engaged with the screw shaft 13. The base part 11 slides along guide bars 14 arranged in parallel sandwiching the screw shaft 13. The wire gripping device 2 is linked swingably to a support arm 12 erected on the base part 11. The clamp part 20 is arranged on an extension line of the screw shaft 13. An input axis 21 providing torque to the screw shaft 13 is arranged in two places oppositely to each other in a horizontal direction orthogonal to the screw shaft 13.SELECTED DRAWING: Figure 1

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a wire extension apparatus used when replacing overhead ground wires passed between utility poles.

  By arranging a spiral cable support called a spiral hanger along the messenger wire installed between the utility poles and passing the guide wire inside with the spiral hanger as a guide, a method of extending the cables between the utility poles is available. Are known. A specific example of this is shown in FIG.

  FIG. 5 shows a conventional extension method as described above. A messenger wire 101 is stretched between the two power poles 100, and a spiral hanger 102 is disposed so as to spirally wrap around the messenger wire 101. The spiral hanger 102 is wound with a gap provided between it and the messenger wire 101, as can be seen from FIG.

  When passing the cable between the two utility poles 100, first, the guide wire 103 is passed through the gap between the messenger wire 101 and the spiral hanger 102 described above. At this time, the leading tool 104 is attached to the tip of the guide wire 103 so that the guide wire 103 does not come off the spiral hanger 102. The leading tool 104 can stably advance without coming off the spiral hanger 102.

  Thus, the tip of the cable extended is connected to the tip of the guide wire 103 passed between the utility poles 100. Then, by pulling back the guide wire 103, the cable can be passed between the power poles 100. Patent Document 1 describes such a technique.

  By using the method as described above, since the cable to be extended can be reliably passed between the utility poles without hanging down, it is possible to work safely without interfering with the equipment below. .

  By the way, overhead ground wire (GW: ground wire) for the purpose of measures against lightning damage is installed at a trunk portion of the high voltage distribution line and at a branch portion of five or more spans connected with the trunk portion.

  This overhead ground wire is installed at the tip of the overhead ground wire fitting attached to the top of the utility pole. When replacing the overhead ground line, the method using the spiral hanger as described above can be used.

  The tensioning device for holding the overhead ground wire in a state in which the overhead ground wire attachment metal is tensioned at the top of the power pole is described in Patent Document 2.

Unexamined-Japanese-Patent No. 2010-233434 JP, 2017-127076, A

  However, when using the above-described stringing device in the overhead ground wire relining work, the tensioning direction is not necessarily constant. In addition, there are various facilities around the power pole head, and it may be difficult to work safely while avoiding interference with the facilities. For this reason, in order to keep the working conditions constant and to avoid interference with peripheral equipment, it is desirable to make the tensioning device compact while eliminating the bias against tension.

  Therefore, an object of the present invention is to provide a stretching apparatus that can maintain constant working conditions even when the stretching directions are different and that is less likely to cause interference with peripheral equipment.

  In order to achieve the above object, the stringing apparatus of the present invention is a stringing apparatus used for reattaching an overhead ground wire, and a base part to which a gripper is swingably connected, and the base part It is disposed on the extension of the screw shaft screwed together to form a feed screw mechanism, an input shaft connected to the screw shaft by a bevel gear, and an overhead ground wire attachment metal And a clamp portion.

  Furthermore, in addition to the above-described configuration, in the wire stretching apparatus according to the present invention, two of the input shafts are disposed to face each other in the horizontal direction.

  Further, in addition to the above configuration, in the wire stretching apparatus according to the present invention, the two input shafts are each connected to a common miter gear integrally provided with the screw shaft. It features.

  As described above, according to the present invention, since the clamp portion is disposed on the extension line of the screw shaft, the center of the grasper attached to the base portion moving along the screw shaft and the overhead ground wire attachment are It can be installed to match. Thereby, it becomes possible to work stably without breaking the balance in the stringing operation.

  Further, according to the present invention, in addition to the above-mentioned effects, since the two input shafts are disposed to face each other in the horizontal direction, it is possible to make the bucket of the high-level work vehicle approach from an appropriate direction to work. it can.

  In addition, even after replacing the overhead ground wire on one side of the utility pole, and then replacing the overhead ground wire on the other side, the installation direction of the wire is reversed, and the elevator car is not moved. It will be possible to work with the buckets of the same aerial work vehicle, i.e. in a substantially similar operating environment.

  Further, according to the present invention, in addition to the above effects, the two input shafts are connected to share the miter gear provided on the screw shaft, so the tensioning direction is reversed and installed. Even if the input is in the same direction of rotation, the stringing operation can be performed. As a result, there is no possibility that the worker will make an error by the tension line direction, and human error can be prevented to improve the safety.

It is a whole perspective view of the wire drawing apparatus of this invention. It is a figure which shows the use condition of the stretching apparatus of FIG. It is a top view of the tension line apparatus of FIG. It is a schematic diagram which shows the internal structure of the stretching apparatus of FIG. It is a figure which shows the conventional cable wire-laying method.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a wire drawing apparatus according to an embodiment of the present invention will be described using the drawings.

  FIG. 1 is an overall perspective view of the stretch wire device 1 of the present invention. The wire stretching apparatus 1 includes a gripping wire 2 for gripping an overhead ground wire, a slide portion 10 for sliding the gripping wire 2 and a clamp portion 20 for fixing itself to the pole.

  First, the configuration of the slide unit 10 will be described.

  A feed screw mechanism is used for the slide mechanism of the slide unit 10. Two guide bars 14 are disposed in parallel with one screw shaft 13. The screw shaft 13 is screwed and disposed at the center of the base portion 11. Similarly, the two guide bars 14 are slidably disposed on both sides of the screwing position of the screw shaft 13 with respect to the base portion 11. Thus, the base portion 11 can be slid in the longitudinal direction of the screw shaft 13 by the rotation operation of the screw shaft 13.

  A support arm 12 is provided upright on the base portion 11. The holding wire 2 is connected to the support arm 12 so as to be able to swing upward.

  Subsequently, the configuration of the clamp unit 20 will be described.

  The clamp unit 20 is disposed on the extension of the screw shaft 13, so that the object to be fixed can be aligned on the extension of the screw shaft 13. The clamp portion 20 is formed of a portion formed in a substantially U shape in a plan view and an open / close frame 22 for opening and closing the U-shaped opening portion. The open / close frame 22 can be opened and closed by turning around the pivot support bolt 15 in a state where the knob 25 is loosened. Further, in the opening / closing frame 22, the pressing bolt 23 is disposed so as to pass through toward the inside, and the pressing plate 24 is connected to the tip of the pressing bolt 23. Thus, the object to be gripped can be press-fixed. The pressing plate 24 is attached so as to be rotatable relative to the pressing bolt 23, and is formed in a disc shape as shown in FIG. Thereby, the opening / closing operation of the opening / closing frame 22 can be performed without the pressing plate 24 interfering with the inner wall of the above-mentioned U-shaped portion. In addition, even in the case where the pressing plate 24 rotates in response to the axial rotation of the pressing bolt 23, interference with the inner wall of the U-shaped portion can be similarly prevented. Operation can be performed smoothly.

  Two input shafts 21 are disposed opposite to each other in the horizontal direction orthogonal to the longitudinal direction of the screw shaft 13 on the side of the clamp portion 20. The screw shaft 13 is rotated by rotational input from at least one of the input shafts 21. The rotation transmission mechanism will be described later.

  FIG. 2 is a view showing a state of use of the stretching apparatus 1 of FIG.

  An overhead ground wire attachment hardware 37 is installed at the upper end of the power pole 100, and it is shown that the old overhead ground wire 33 to be replaced is constructed at the upper end of the overhead ground wire attachment hardware 37. In order to replace the old overhead ground line 33 with a new overhead ground line 34 (indicated by a two-dot chain line in the figure), the above-described stretch line device 1 is used. The wire drawing apparatus 1 is fixed to the overhead ground wire attachment hardware 37 by a clamp unit 20 (see FIG. 1). A spiral hanger 35 is wound around the old overhead ground wire 33. The spiral hanger 35 is disposed for guiding between the adjacent utility poles (not shown) on which the new overhead ground wire 34 is stretched.

  The new overhead ground line 34 is pulled up from below the utility pole 100. At the time of pulling up, in order to avoid interference with the high voltage wire 36, the new overhead ground wire 34 is passed through a guide pipe 32 supported at a position separated from the high voltage wire 36 by the support rods 30, 31. Then, the tip of the new overhead ground wire 34 pulled up is sent through the inside of the spiral hanger 35 to the adjacent power pole side.

  The new overhead ground wire 34 connected to the adjacent utility pole side in this manner is lifted by the stretch wire device 1 fixed to the overhead ground wire attachment bracket 37.

  Here, a plan view of the stretching apparatus 1 is shown in FIG.

  As shown in FIG. 3, in the wire stretching apparatus 1 of the present invention, a screw shaft 13 is provided substantially at the center in a plan view. And, the grasper 2 is connected so that the overhead ground line can be gripped immediately above the screw shaft 13.

  Furthermore, on the extension of the screw shaft 13, the clamp portion 20 is provided as described above. Since it is comprised in this way, the gripping wire device 2 of the wire stretching apparatus 1 is slide-operated, without the new overhead ground wire 34 to be tensioned being released from immediately above the overhead wire attachment fitting 37 (see FIG. 2). Ru.

  Therefore, in the process of increasing or decreasing the tension, the reaction force does not generate a force that causes the stretching wire device 1 to rotate around the overhead ground wire attachment hardware 37, and it is possible to work stably.

  In FIG. 3, a dashed dotted line is superimposed on a line passing through the center of the screw shaft 13, the grip wire 2, and the clamp unit 20.

  Further, as described above, since the stretching apparatus 1 is configured to be symmetrical in plan view and the input shaft 21 is provided on either side, the worker can work from either side. It is possible. Depending on the environment in which the work is performed, it may be assumed that wires, distribution equipment, buildings, trees, etc. are in close proximity or congested, but since two input shafts 21 are provided, working freedom can be improved. . This is also advantageous when reversing and using the stretch wire device 1 at the same position.

  Next, the internal structure of the wire drawing apparatus 1 is shown in FIG. Here, the stretching apparatus 1 of FIG. 1 is schematically represented in a plan view to the extent that the entire configuration can be understood, and for the convenience of description, the grasper 2 and other detailed configurations are illustrated. Is omitted.

  In FIG. 4A, bevel gears 27 and 28 are provided opposite to each of the two input shafts 21, and these bevel gears 27 and 28 are connected to a bevel gear 26 provided on the screw shaft 13. Shows the configured configuration. Since it is constituted in this way, screw axis 13 can be operated from either of two opposing input shafts 21.

  Further, since the bevel gear 26 of the screw shaft 13 is shared, the rotational direction toward the side in which the tension is increased is the same for any input shaft 21. Therefore, even when the wire drawing apparatus 1 is reversed and used, or even when the work position is changed, the operator is less likely to make mistakes such as performing the reverse operation. This can prevent the occurrence of human error.

  In addition, as for the bevel gears 26-28 demonstrated here, if sufficient transmission of force is possible, it is desirable to use a miter gear from the reason that it can be comprised compactly. However, if there is no restriction on space and emphasis is placed on operability, bevel gears may be used.

  Not limited to the configuration of FIG. 4A, it is also possible to adopt the configurations of FIGS. 4B and 4C described below.

  FIG. 4B is disposed in the opposite direction to the bevel gear 29 provided on the screw shaft 13. The other configuration is the same as that shown in FIG.

  In FIG. 4 (c), two opposing bevel gears 26 and 29 are provided on the screw shaft 13 side. Among these, the bevel gear 27 of the input shaft 21 a is coupled to the bevel gear 26, and the bevel gear 28 of the input shaft 21 b is coupled to the bevel gear 29. In the case of the configuration of FIG. 4C, unlike the configurations of FIGS. 4A and 4B, the rotational directions of the input shafts 21a and 21b are not the same with respect to the change in tension. Therefore, when changing the input shafts 21a and 21b during work, it is necessary to cope with the reverse operation. However, in the case of operating by reciprocation using a ratchet tool or the like, the direction in which the force is applied matches the direction in which the tension changes, so the operation can be performed intuitively.

  The configuration shown in the above embodiment is an example of the present invention, and the following modifications are also included.

  In the above embodiment, the configuration in which the guide bar 14 is disposed to the side of the screw shaft 13 is shown as an example, but it may be disposed below or above as long as the position does not interfere with the grip wire 2 . Moreover, if it is the structure which can be balanced, it may be 1 or 3 or more in addition to 2 structure.

  Moreover, in the said embodiment, direction of the opening of the clamp part 20 showed as an example the structure currently formed so that the extension direction of the screw shaft 13 may be. However, the opening may be formed in the direction orthogonal to the screw shaft 13 as long as the object to be gripped can be accommodated and fixed on the extension of the screw shaft 13.

  Further, in the above embodiment, the configuration in which the input shaft 21 is disposed to be orthogonal to the screw shaft 13 and to be opposed horizontally is shown as an example. However, in the configuration in which the balance is not broken in plan view, at least one input shaft is sufficient, and it is not necessary to arrange in the horizontal direction.

  In the above embodiment, the support arm 12 may be attached to the base portion 11 so as to be movable in the horizontal direction and in the direction perpendicular to the screw shaft 13. Alternatively, the support arm 12 may be connected to the base portion 11 so as to be able to swing in the direction perpendicular to the screw shaft 13, and the swing angle may be adjusted.

  Although the aging of the social infrastructure of the overhead ground wire of the distribution line progresses and replacement becomes necessary, the overhead wire of the present invention can be easily replaced.

  Moreover, since the center position of a clamp part and a holding wire device corresponds in planar view in the stretch line apparatus of this invention, if it is the environment where the wire rod stretched and an installation object do not interfere, the parent in a construction site It can be used in a wide range of fields, such as rope tensioning work.

DESCRIPTION OF SYMBOLS 1 Stretching wire device 2 Grab wire 10 Slide part 11 Base part 12 Support arm 13 Screw shaft 14 Guide bar 15 Support bolt 20 Clamp part 21, 21a, 21b Input shaft 22 Open and close frame 23 Press bolt 24 Press plate 25 Knob 26 Knob 26, 27, 28 and 29 Umbrella gear 30, 31 Support rod 32 Guide pipe 33 Old overhead ground wire 34 New overhead ground wire 35 Spiral hanger 36 High-tension wire 37 Overhead ground wire attachment hardware 100 Power pole 101 Messenger wire 102 Spiral hanger 103 Guide wire 104 Lead Tool

Claims (3)

It is a stringing machine used for the replacement of the overhead ground line,
A base portion to which the grip wire is pivotably connected;
A screw shaft screwed to the base portion to constitute a feed screw mechanism;
An input shaft connected to the screw shaft by a bevel gear;
And a clamp unit disposed on an extension of the screw shaft and clamping an overhead ground wire fitting.   The wire arrangement according to claim 1, wherein two input shafts are disposed to face each other in the horizontal direction.   3. The apparatus according to claim 2, wherein the two input shafts are each connected to a common miter gear provided integrally with the screw shaft.