Overhead line deviation adjustment device and method for using the same

Abstract

To provide an overhead line deviation adjustment device that simplifies installation, operation, and removal, improves the efficiency of deviation adjustment work and reduces working time.SOLUTION: An overhead line deviation adjustment device 1 is configured to adjust the deviation in an extension orthogonal direction of a suspension overhead line M fixed to a suspension overhead line support metal fitting 26 on a movable bracket 20. The overhead line deviation adjustment device 1 supports: a pair of trapezoidal screws 5, 5 arranged in parallel to a frame 2 in a manner of being able to advance / retract in the axial direction with respect to the suspension overhead line M and unable to rotate around the axis on the frame 2 that can be detachably attached to the attachment metal fitting 8a on a main pipe 21 to which an overhead line support member 26 is fixed; and an operating bolt 3 such that a bolt head 10 on the opposite side can be operated to rotate around the axis by making the tip surfaces of coaxial shaft parts 11 abut each other in an orthogonal direction. The trapezoidal screws 5 are fed in the axial direction through the rotation operation of the operating bolt 3 via a worm wheel 6 held by the frame 2, and the suspension overhead line M engaged with a pair of pulleys 14a, 14b is pushed and pulled.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an overhead line deviation adjustment device for adjusting the lateral support position of an overhead line, such as a suspension line, on a movable bracket that supports the overhead line and is subjected to tension (hereinafter referred to as "lateral tension") in a direction perpendicular to the line extension (hereinafter referred to as "lateral direction"). [Background technology]

[0002] An electric contact line, such as a suspension wire, installed along a railway track is fixed by an electric contact support member on movable brackets supported by supports such as poles at a specified interval, and a specified tension is applied. The lateral deviation of this electric contact line is specified within a specified range as an offset from the center between the rails. This deviation includes zigzag deviation in straight sections, deviation to match the curve of a curved section, deviation to ensure separation in air section sections, etc. The lateral deviation of this electric contact line is adjusted when laying or replacing the electric contact line, replacing movable brackets, and changing the cant, and is an important management item in terms of maintenance of electric contact line facilities. Movable brackets are classified into I-type, which pulls the overhead line toward the support side, where the lateral tension acts on the opposite side to the support, and O-type, which pulls the overhead line toward the opposite side to the support, where the lateral tension acts on the opposite side to the support. In the case of an I-type movable bracket, the horizontal position of the overhead line support member on the movable bracket, which fixes the suspension wire, is adjusted while the lateral tension is temporarily received by the movable bracket's support. In the case of an O-type movable bracket, the lateral tension of the overhead line acts on the support side, so that it is necessary to stretch a wire between the overhead line supported by the movable bracket and the adjacent movable bracket supporting the overhead line on the opposite track (adjacent line) and pull the wire with a tool called a shimeler, or to temporarily install a support pillar called a standpost, which is 4 to 5 m high, on the track and temporarily receive the lateral tension of the overhead line on this. Also, a movable bracket adjustment device has been proposed that temporarily fastens the suspension wire and adjusts the flow in the wire extension direction to move the movable bracket to an appropriate position in order to adjust the support position of the trolley wire or the suspension wire (see Patent Document 1). This movable bracket adjustment device includes a main frame that slidably engages with a sliding block equipped with a clamping means that is detachable from the movable bracket in the wire extension direction, a flow adjustment screw that is rotatably supported by the main frame in the longitudinal direction and is screwed into the sliding block to move the sliding block relative to the main frame when rotated, a pair of parallel threaded grip rods that are equipped with gripping members that can clamp the suspension wire and are supported at both ends of the main frame so as to be movable on an axis perpendicular to the wire extension direction, and a deviation adjustment nut that rotates the pair of grip rods around the axis to move them in the axial direction. This movable bracket adjustment device fixes a sliding block onto the movable bracket with a clamping means, grips the suspension wire with a gripping member, and moves the grip rod by rotating the deviation adjustment nut, temporarily receiving the tension of the suspension wire in place of the suspension wire fixing means attached to the movable bracket, and adjusts the flow of the suspension wire in the extension direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-159805 A Summary of the Invention [Problem to be solved by the invention]

[0004] The conventional method using a wire, a shimmer and a stand requires preparatory work such as voltage testing and grounding of adjacent overhead lines, setting up a stand, hanging a ladder to the adjacent overhead line, stretching the wire, tightening the shimmer, and installing, operating and removing large-scale equipment, which has the disadvantage of being labor-intensive and taking a long time for the entire work. In addition, since the movable bracket adjustment device described in Patent Document 1 is intended to temporarily receive lateral tension in order to adjust the flow in the extension direction, if it is used to adjust the lateral deviation, the front and rear parts of the overhead line support member of the suspension line must be gripped and the rotation operation of a pair of grip rods must be repeated individually and alternately, which is inefficient and time-consuming. Since the deviation adjustment nut is located at the end of the grip rod perpendicular to the extension direction, for a suspension line in a narrow space such as inside a tunnel, the electric tool attached to the deviation adjustment nut interferes with the inner wall or ceiling, and the operation must be performed with a hand tool, which further deteriorates the work efficiency. If the work is rushed in the cumbersome alternate rotation operation of the pair of deviation adjustment nuts and the amount of movement of the grip rod on one side is increased, the tension may be biased to one of the grip members that clamp the suspension line at two points, which may damage the suspension line. Furthermore, since the clamping means for the movable bracket is fixed to the device body and is limited to a pipe with a specific diameter, it is necessary to prepare different types of clamping means according to the pipe diameter of the constituent material of the movable bracket together with the device body. Therefore, an object of the present invention is to provide an overhead line deviation adjustment device that is easy to install, operate, and remove, improves the efficiency of deviation adjustment work and shortens the work time, prevents localized overload of the overhead line, and increases the freedom of installation location. [Means for solving the problem]

[0005] In order to solve the above problems, the present invention provides an overhead line deviation adjustment device 1 that adjusts the lateral deviation of an overhead line such as a suspension wire M that is fixed by an overhead line support member 26 onto a movable bracket 20 that is supported by a support and extends in a direction perpendicular to the extension of the wire. The overhead line deviation adjustment device 1 comprises a frame 2 that is detachably fixed to a mounting bracket 8a that is attached to a component of a movable bracket 20 to which an overhead line support member 26 is fixed; a pair of pulleys 14a, 14b at their tip ends that face each other and are supported so as to be rotatable in the horizontal direction so that the overhead line is disposed between the front and rear positions of the overhead line support member 26, respectively; a pair of parallel trapezoidal screws 5, 5 that are supported by the frame 2 so as to be able to advance and retreat in the axial direction relative to the overhead line but not to rotate about the axis; a worm wheel 6 that has screw holes through which the pair of trapezoidal screws 5, 5 are inserted and engage with, and is held by the frame 2 so as to be immovable in the axial direction; and an operating bolt 3 that is supported by the frame 2 so as to be able to rotate the bolt heads 10 on the opposite sides about the axis by butting the tip faces of coaxial shaft portions 11 against each other, and that is equipped with worms 11a that engage with the outer peripheries of the worm wheels 6 around the axis, and both shaft portions can be connected and separated by a connecting member 4. By rotating the operating bolt 3, the trapezoidal screw 5 is advanced axially via the worm wheel 6, and the overhead wire M is pushed and pulled in a direction perpendicular to the wire extension, moving it together with the overhead wire support member 26, and the overhead wire support member 26 is fixed to the movable bracket 20 at a predetermined offset position. Effect of the Invention

[0006] According to the present invention, by rotating one operating bolt, the other also rotates, so that the deviation adjustment work can be made more efficient and the work time can be shortened, the deviation adjustment of the suspension wire can be easily and accurately performed, the suspension wire is held in place by a pulley so that it can be paid out while sharing the lateral tension evenly, so that no localized load is placed on the suspension wire and damage to the suspension wire can be prevented, and since the operating screw in the extension direction is rotated, space for attaching tools can be secured even in narrow spaces such as inside tunnels, and the work efficiency can be further improved by using electric tools, and the main frame can be attached to mounting members according to the pipe diameters of different movable brackets, expanding the degree of freedom of application. If the pair of operating bolts are separated and rotated individually, deviation adjustment can be smoothly performed with the lateral tension shared equally between the front and rear parts of the overhead line support member of the overhead line. [Brief description of the drawings]

[0007] [Figure 1] 1A is a front view of an overhead wire deviation adjustment device according to the present invention in an installed state, and FIG. [Diagram 2] FIG. 2 is a plan view of the overhead wire deviation adjustment device of FIG. 1. [Diagram 3] FIG. 2 is a front view of the overhead wire deviation adjustment device of FIG. [Figure 4] FIG. 2 is a side view of the overhead wire deviation adjustment device of FIG. 1. [Diagram 5] FIG. 4 is a cross-sectional view of FIG. 3 . [Figure 6] FIG. 2 is a plan view of the overhead wire deviation adjustment device of FIG. 1 in use. [Figure 7] FIG. 2 is a plan view of the overhead wire deviation adjusting device of FIG. 1 in another state of use. [Figure 8] FIG. 11 is a plan view of an overhead wire deviation adjustment device according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, the movable bracket 20 includes a main pipe 21, the base end of which is connected to a support column (not shown) by a mounting band so as to be horizontally rotatable and extends in a direction perpendicular to the extension line, an inclined pipe 22, the base end of which is also connected to the support column by a mounting band so as to be horizontally rotatable and extends diagonally upward toward the main pipe 21 so as to support the main pipe 21 from below, and an anti-vibration pipe 23, which is connected between the tip of the main pipe 21 and the middle part of the inclined pipe 22. The anti-vibration pipe 23 is provided with a curved pull bar 25, which is connected to the parallel part with the main pipe 21 by a support bracket 24 so as to be vertically tiltable, and the ear at the tip of the curved pull bar holds the trolley wire T. The trolley wire T is suspended from the overhead suspension wire M by hangers (not shown) provided at a predetermined interval in the extension line direction. A suspension wire support bracket 26, which is a suspension wire support member that fixes the suspension wire M to the main pipe 21, is attached near the joint between the main pipe 21 and the inclined pipe 22. The suspension line support bracket 26 has a semi-cylindrical gripping portion 26a that fits and screws along the upper surface of the main pipe 21. The gripping portion 26a has a plurality of bolt insertion holes that selectively correspond to a plurality of bolt insertion holes lined up in the axial direction on the side of the main pipe 21, making it possible to adjust the attachment position on the main pipe 21. The position of the suspension line support bracket 26 on the main pipe 21 is adjusted by the overhead line deviation adjustment device 1 according to the present invention.

[0009] As shown in Figures 2 to 4, the overhead line deviation adjustment device 1 comprises a frame 2 fixed on a main pipe 21, a pair of operating bolts 3, 3 spanning between both longitudinal ends of the frame 2 and coaxially connected to each other by a connecting tube 4, a pair of parallel trapezoidal screws 5, 5 extending horizontally from both ends of the frame 2 in a direction perpendicular to the operating bolts 3 and equipped with overhead line hook members 7 at their tips, and worm wheels 6 which engage with the operating bolts 3 and the trapezoidal screws 5 at both ends of the frame 2, respectively.

[0010] The frame 2 comprises a base 8 in the middle and a casing 9 connected to both ends of the base 8. The base 8 is composed of a pair of flat plates facing each other at the top and bottom, which are provided with a mounting bracket 8a that holds the main pipe 21 at the longitudinal center and a bolt insertion tube 8b through which a fixing bolt passes vertically in order to attach it to the main pipe 21. The casing 9 has the operating bolt 3 passing through its upper part so as to be rotatable about its axis, and holds the worm wheel 6 at its lower part, supporting the trapezoidal screw 5 so as to be slidable in the axial direction perpendicular to the operating bolt 3.

[0011] The operating bolt 3 comprises a bolt head 10 which can be rotated along the side of the casing 9, and a shaft portion 11 which extends horizontally along the base 8 and is coaxially butted together at the center of the base 8, with their tip faces in contact with each other. As shown in Fig. 5, a worm 11a is fixed to the outer periphery of the shaft portion 11 which is located inside the casing 9. The shaft portions 11, 11 are connected to each other by a connecting tube 4, and their tips are keyed together with the connecting tube 4 to rotate together, but they can also be separated and rotated individually. The connecting tube 4 is positioned at the connection position with a radial ball plunger protruding into a recess formed by chamfering the tip edge of the shaft portion 11.

[0012] The trapezoidal screw 5 has a threaded portion formed on its outer periphery over almost the entire length, and is keyed to a retaining member 12a of the casing 9 to prevent it from rotating.

[0013] The worm wheel 6 is rotatably held within the casing 9 by front and rear retaining members 12a, 12b, and as shown in Figure 5, the trapezoidal screw 5 is inserted so that its inner circumference engages with the threaded portion, and its outer circumference engages with the worm 11a on the operating bolt 3, and by rotating the operating bolts 3, 3, the trapezoidal screw 5, 5 is moved in a straight line.

[0014] The overhead line hanging member 7 comprises a bracket 13 bolted to the tip of the trapezoidal screw 5, and a pair of pulleys 14a, 14b rotatably supported by the bracket 13. The bracket 13 comprises a pulley support plate 15 with an opening for receiving the overhead line M, a cover plate 16 rotatably supported on the rotation shaft of one pulley 14a of the pulley support plate 15 so as to open and close the opening, and a wing bolt 17 for fixing the cover plate 16 to the pulley support plate 15. The edge of the cover plate 16 is provided with cutouts 16a, 16b to avoid interference with the other pulley 14b and the wing bolt 17. The pulleys 14a, 14b have annular grooves facing each other, into which the overhead line M is hung.

[0015] A method of using this overhead line deviation adjustment device 1 will now be described. The stand 8 is temporarily placed on the mounting bracket 8a of the main pipe 21, and the trapezoidal screws 5, 5 are slid back and forth by rotating the operating bolt 3 to align the position of the overhead line hook member 7 with the overhead line M at the front and rear parts of the overhead line support bracket 26, and the overhead line M is inserted between the pulleys 14a, 14b in the pulley frame 12 with the cover plate 16 open. At this time, the trapezoidal screws 5, 5 move linearly and reciprocally in sync via the worm wheel 6 when the bolt head 10 on one side of the operating bolts 3, 3 connected by the connecting tube 4 is rotated with a tool. If it is difficult to simultaneously insert the overhead line M into a pair of overhead line hook members 7, 7, the connecting tube 4 can be slid to separate the operating bolts 3, 3, and the overhead line hook members 7, 7 can be aligned by rotating them individually. After inserting the overhead wires M into both overhead wire hanging members 7, the cover plate 16 is closed and tightened with the wing bolt 17, and a connecting bolt is inserted into the mounting bracket 8a and the bolt insertion tube 8b of the frame 8 to fix the tightening frame 2 to the main pipe 21. Next, the operating bolt 3 is rotated to slide both trapezoidal screws 5, 5 relative to the frame 2, and with the lateral tension applied to the suspension wire M being entrusted to the overhead line deviation adjustment device 1, the mounting bolt of the gripping portion 26a is removed while the suspension wire M is fixed to the suspension wire support bracket 26 on the main pipe 21. This makes it possible for the suspension line support bracket 26 to move on the main pipe 21 while the suspension line M is held by the overhead line deviation adjustment device 1, and by rotating the operating bolt 3 on one side, both trapezoidal screws 5, 5 will slide relative to the frame 2 fixed on the main pipe 21, as shown in Figures 6 and 7.This means that the suspension line M hanging on the pulley 14a (14b) can be pulled in, pulled back, pushed away, and pushed back, regardless of the direction of the acting lateral tension, thereby smoothly adjusting the deviation position. Once the overhead line M has been placed at the specified deviation, the overhead line support member 26 is fastened to the main pipe 21 with the mounting bolts, and the operating bolt 3 is reversed to return the lateral tension applied to the overhead line M to the overhead line support member 26 and hold it in place. Thereafter, the wing bolt 17 of the overhead line hook member 7 is removed and the cover plate 16 is rotated to the open position to detach the overhead line hook member 7 from the overhead line M, the mounting bracket 8a is removed from the main pipe 21, and the overhead line deviation adjustment device 1 is removed.

[0016] Incidentally, the overhead line deviation adjustment device 1 is attached and operated on the tip side of the main pipe 21 relative to the overhead line M as in the previous embodiment, but it may be attached and operated on the base end side of the main pipe 21 instead.

[0017] Another embodiment for adjusting the deviation of the substitute trolley wire S, which is an overhead line instead of a suspension wire, is shown in Fig. 8. The substitute trolley wire S is connected to the end of the trolley wire in the air section where the trolley wire transitions to another adjacent trolley wire on the extension line, and is guided by a guide pulley 27, which is an overhead line support member on the anti-swing pipe 23 of the movable bracket 20, so that it can be evacuated diagonally upward from the extension direction. The overhead line deviation adjustment device 1 is attached on the anti-swing pipe 23 to hold the substitute trolley wire S, and can adjust the deviation of the substitute trolley wire S in the same manner as the previous embodiment. [Explanation of symbols]

[0018] 1. Overhead line deviation adjustment device 2 Frames 3 Operating bolt 4 Connection tube 5 Trapezoidal Thread 6 Worm Wheel 7. Cable retaining member 8 Mounting stand 8a Mounting bracket 8b Bolt insertion tube 9. Casing 10 Bolt Head 11 Shaft 11a Warm 12a Holding member 12b Holding member 13 Bracket 14a Pulley 14b Pulley 15 Pulley support plate 16 Lid plate 15a Cut 15b Cut 17 Wing bolt 20 Movable bracket 21 Main Pipe 22 Inclined Pipe 23 Anti-vibration pipe 24 Support bracket 25 Curved Pull Fitting 26 Suspension line support bracket (suspension line support member) 26a Gripping part 27 Guide pulley (overhead line support member) T contact wire M suspension line S Substitute trolley wire

Claims

1. A catenary deviation adjustment device that adjusts deviation of an catenary in a direction perpendicular to the extension direction, the catenary being fixed by an catenary support member onto a movable bracket that is supported by a support and extends in the direction perpendicular to the extension direction, a frame that is detachably fixed to a mounting bracket that is attached to a component of the movable bracket to which the overhead line support member is fixed; a pair of parallel trapezoidal screws each including a pair of pulleys at a tip end thereof, the pulleys being supported rotatably in a horizontal direction and facing each other so as to be disposed between the front and rear portions of the overhead line support member of the overhead line, the pair of parallel trapezoidal screws being supported by the frame so as to be capable of advancing and retreating in an axial direction relative to the overhead line and not rotatable about an axis; a worm wheel having a screw hole into which the pair of trapezoidal screws are inserted and engaged, the worm wheel being held by the frame so as to be immovable in the axial direction; a pair of operating bolts, each of which is supported by the frame so that the heads of the bolts on the opposite sides can be rotated around the axis with the tip surfaces of the coaxial shaft portions butted against each other, each of which is provided with a worm that meshes with the outer periphery of the worm wheel around the axis, and both shaft portions can be connected and separated by a connecting member; A catenary deviation adjustment device characterized in that the trapezoidal screw is advanced in the axial direction via a worm wheel by rotating the operating bolt, thereby pushing and pulling the catenary in a direction perpendicular to the extension direction.

2. The frame includes a base having a bolt insertion hole for bolting to a mounting bracket attached to a component of the movable bracket; 2. The overhead line deviation adjustment device according to claim 1, further comprising a casing for supporting the operating bolt on both sides of the frame and for holding the worm wheel with the trapezoidal screw inserted therethrough.

3. 2. The overhead line deviation adjustment device according to claim 1, wherein the connecting member is a connecting tube that fits around the shafts of both operating bolts and is keyed to each other, and that incorporates a ball plunger that engages with a recess formed by the chamfered edges of the end faces of the operating bolts that are in contact with each other.

4. a step of arranging the overhead line between the pair of pulleys at the front and rear of the overhead line support member and fixing the frame to the mounting bracket attached to a component of the movable bracket; a step of rotating one of the operating bolts to move the trapezoidal screws forward and backward relative to the overhead wire, thereby holding the overhead wire in place of the overhead wire support member, and removing the overhead wire support member while keeping the overhead wire fixed; Further, a step of rotating the operating bolt to push and pull the overhead wire in a direction perpendicular to the wire extension direction, thereby adjusting a deviation position of the overhead wire together with the overhead wire support member; and a step of fixing the overhead wire support member to the component member at a predetermined deflection position of the overhead wire, fastening the overhead wire to the overhead wire support member, and removing the overhead wire deflection adjustment device.

5. 5. The method for using the overhead wire deviation adjustment device according to claim 4, further comprising the step of separating the pair of operating bolts connected by the connecting member, and individually rotating the operating bolts before removing the overhead wire support member from the component, thereby causing the pair of trapezoidal screws to bear lateral tension acting in a direction perpendicular to the extension of the overhead wire evenly.

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