JP6716338B2 - Pull-out device for overhead tension spring balancer - Google Patents

Description

The present invention relates to a spring type tension balancer installed at a high place between a supporting structure and an overhead wire in order to keep the tension of an overhead wire such as a trolley wire for a train track and a feeder line overhead. The present invention relates to a device for pulling out an inner cylinder of the tension balancer from an outer cylinder to a predetermined position in order to adjust an initial tension.

A spring tension balancer that holds an overhead line for a train track at a high place on a support structure such as a concrete column is an outer cylinder that contains a coil spring and is inserted into this outer cylinder. And an overhead line is connected to the front end of the inner barrel. The inner cylinder is pulled out of the outer cylinder against the spring force until the desired initial tension is obtained.

Such a spring tension balancer is a known one that applies a constant tension to the overhead wire by the elasticity of the coil spring according to the expansion and contraction or movement of the overhead wire. The spring tension balancer may be supported by the concrete column on the tip side of the outer cylinder by an oblique support arm that extends obliquely upward from the concrete column, as shown in Patent Document 1, for example.

On the other hand, if the overhead line breaks for some reason, the spring tension balancer as described above can be used to perform restoration work in a short time without installing it at a high place and installing it at a high place. Patent Document 2 proposes a pulling-out device for the inner cylinder. This drawer device has a mounting member that is detachably suspended on an outer cylinder, a pair of pressure cylinders that are detachably supported by the mounting member, and a rod of this pressure cylinder that is detachably coupled to the tip side of the inner cylinder. And a pressure device arranged above the ground to supply pressure to the pressure cylinder via a pressure hose.

The pair of pressure cylinders are arranged so that the axis is parallel to the axis of the outer cylinder and the rod projects toward the tip of the outer cylinder. This drawer device is attached to a tension balancer installed at a high place, and is used so that the rod of the pressure cylinder is projected by the hydraulic pressure supplied from the ground to draw the inner cylinder from the outer cylinder to a predetermined position.

JP, 2010-179673, A JP, 2010-173545, A

In use, the drawer device described in Patent Document 2 is used by a worker who operates a hydraulic device on the ground, goes up to a high place, mounts and adjusts the device on a tension balancer, and gives instructions to a ground worker. Requires at least two personnel of workers. In addition, since the pressure device is included, the device is large and heavy, and it is not easy to handle.

As described in Patent Document 1, the drawer device is also expected to be applied to a tension balancer of a type supported by a concrete column on the tip side of the outer cylinder by an oblique support arm, so that the length of the pressure cylinder is increased. Is set to a length that does not interfere with the connection with the diagonal support arm. Therefore, as a result of the pull-out length of the inner cylinder being limited to the length of the pressure cylinder, the pull-out length may be insufficient and the standard initial tension may not be obtained. Although this is sufficient for emergency restoration work, this drawer cannot be used for new construction of overhead lines.

By the way, among spring tension balancers, there are a plurality of types in which the outer cylinder has a different radius depending on the difference in tension. The drawer device cannot flexibly deal with such plural types of tension balancers.

Therefore, the present invention is, firstly, a spring-type tension balancer that is relatively small and lightweight, easy to handle, and that can be installed and pulled out by only one worker who is elevated to a high place. The purpose of the present invention is to provide a drawer device. Secondly, an object of the present invention is to provide a pull-out device of a spring tension balancer capable of obtaining a required pull-out length of the inner cylinder regardless of the position of the connecting portion between the support arm and the outer cylinder. There is. Thirdly, an object of the present invention is to provide a pull-out device for a spring type tension balancer which can be flexibly applied to a plurality of types of tension balancers having different outer cylinder radii.

The present invention will be described below with reference to the reference numerals in the accompanying drawings, but the present invention is not limited thereto.

In order to solve the above-mentioned first problem, the drawer device 1 of the present invention includes a mounting member 2 which is detachably suspended by an outer cylinder 52, and an axis line of the outer cylinder 52 which is detachably supported by the mounting member 2. A pair of screw jacks 3 for projecting a screw shaft 4 oriented parallel to the axis toward the tip of the outer cylinder 52, a connecting member 5 for detachably coupling the screw shaft 4 to the tip of the inner cylinder 53, and a pair of screws. And a drive shaft 6 for driving the jack 3 at the same time. The pair of screw jacks 3 respectively include drive gears 32 facing each other so that the spline holes 32a are arranged on the same axis line orthogonal to the axis line of the outer cylinder 52. The drive shaft 6 is provided with a drive operation portion at one end side and is a spline shaft that can be inserted into and removed from the spline hole 32 a of the drive gear 32.

In the drawer device 1 of the present invention for solving the second problem, the screw shaft 4 is coupled to the distal end side of the inner cylinder 53 via the connecting member 5, and the inner end of the distal shaft 37. An extension shaft 38 that can be connected to the end of the cylinder 53 opposite to the pull-out direction is provided.

In the drawer device 1 of the present invention for solving the third problem, the attachment member 2 holds the screw jacks 3, respectively, and the first and second members 7 which can be coupled and separated in the radial direction of the outer cylinder 52. , 8 and a spacer 9 selectively interposed between the first member 7 and the second member 8 in accordance with the difference in the radius of the outer cylinder 52.

The spring tension balancer withdrawal device 1 according to the present invention is relatively small and lightweight because it does not use a hydraulic device and a pressure cylinder, and it is easy to handle. The device can be installed and pulled out by itself.

Further, by providing the screw shaft 4 with a connecting structure of the tip shaft 37 and the extension shaft 38, new extension shafts 38 can be replenished one after another from the rear side, so that the outer cylinder 52 and the support arm 54 can be connected. A required pull-out length of the inner cylinder 53 can be obtained regardless of the position of the connecting portion.

In addition, since the mounting member 2 includes the first and second members 7 and 8 and the spacer 9, the pulling device 1 can be flexibly applied to a plurality of types of tension balancers 51 having different radii of the outer cylinder 52. Have an effect.

It is a front view of the drawer|drawer apparatus in the state mounted|worn with the spring type tension balancer. It is a side view of the drawer apparatus of FIG. It is a top view of the drawer|drawing-out apparatus of FIG. It is a front view of the attachment member in the drawer apparatus of FIG. It is a right view of the attachment member of FIG. 5 is a left side view of the attachment member of FIG. 4. FIG. It is a top view of the attachment member of FIG. It is a front view of the screw jack in the drawer of FIG. It is a rear view of the screw jack in the drawer apparatus of FIG. It is a side view of the screw jack in the drawer of FIG. It is a top view of the screw jack in the drawer of FIG. It is sectional drawing of the screw shaft in the drawer apparatus of FIG. It is sectional drawing of the front-end|tip shaft in the screw shaft of the drawer apparatus of FIG. It is sectional drawing of the extension shaft in the screw shaft of the drawer apparatus of FIG.

An embodiment of the present invention will be described with reference to the drawings.
Overhead lines for electric lines, such as a catenary line, a feeder line, and a trolley line, are held by a support structure via spring tension balancers 51 at both ends of a predetermined span. As shown in FIG. 1, a spring tension balancer 51 has an outer cylinder 52 whose base end (left end) side is locked at a high place of a support structure, and a telescopic insert which is telescopically inserted into the outer cylinder 52. The outer cylinder 52 is provided with an inner cylinder 53 arranged so as to project toward the tip (right end) side. Hereinafter, the axial direction proximal end side of the outer cylinder 52 will be described as rear and the distal end side as front.

The outer cylinder 52 has a built-in spring, and the spring urges the inner cylinder 53 in a direction to draw the inner cylinder 53 toward the base end side of the outer cylinder. The spring tension balancer 51 is supported at a high place of the support structure with its axis oriented substantially horizontally via the diagonal support arm 54 and the like, and the overhead wire connected to the tip side of the inner cylinder 53 expands and contracts due to temperature changes and the like. Even so, the elasticity of the spring applies a constant tension to the overhead wire.

The drawer 1 is mounted on a spring tension balancer 51 installed at a high place, and the tension is adjusted by drawing the inner cylinder 53 of the balancer 51 from the tip end side of the outer cylinder 52 to a predetermined position. It is a device for performing the work.

1 to 3, a pulling device 1 includes a mounting member 2 suspended on an outer cylinder 52 of a tension balancer 51, a pair of screw jacks 3 supported by the mounting member 2, and a screw shaft 4 of the screw jack 3. Is provided with a connecting member 5 for connecting the clevis 55 to the clevis 55 on the tip side of the inner cylinder 53, and a drive shaft 6 (FIGS. 2 and 3) for simultaneously driving the pair of screw jacks 3.

The screw jack 3 directs the axis of the screw shaft 4 to be parallel to the axis of the outer cylinder 52, and projects the screw shaft 4 in the front end direction (forward) of the outer cylinder 52 so that both sides (left and right) in the direction orthogonal to the axis of the outer cylinder 52. ), and is attached to the attachment member 2. Each member is individually lifted to a high place where the tension balancer 51 is installed, assembled on the tension balancer 51, and removed and collected after use.

As shown in FIGS. 4 to 7, the mounting member 2 includes a first member 7 and a second member 8 which are divided into two parts on the left and right in a direction orthogonal to the axis of the outer cylinder 52, and a spacer 9 interposed between the two members. And are connected with a bolt 10. The first member 7 and the second member 8 respectively hold the screw jack 3 and can be coupled and separated in the radial direction of the outer cylinder 52. A spacer 9 is selectively interposed between the second member 8 and the second member 8.

The mounting member 2 includes a cutout ring-shaped hooking portion 11 that is hooked on the outer peripheral upper portion of the outer cylinder 52 on the distal end side, an abutting plate portion 12 that is fixed to the front end of the hooking portion 11, and is opposed to this. The rear end plate portion 13 fixed to the rear end of the hook portion 11 is provided.

As shown in FIGS. 2 and 5, the hook portion 11 has a notched ring shape that opens downward and is detachably fitted to the outer periphery of the outer cylinder 52 on the distal end side. The contact plate portion 12 is fixed to the front end surface of the hook portion 11, and includes an arc-shaped recess 14 and a pair of left and right jack support portions 15. The edge of the arcuate recess 14 extends radially inward from the front end of the hook portion 11 to form an inner flange portion 16 that abuts on the front end of the outer cylinder 52. The jack support portion 15 has arcuate cutouts 17 that project to the left and right sides of the outer cylinder 52 and that open outward in the horizontal radial direction of the outer cylinder 52.

As shown in FIG. 6, the rear end plate portion 13 has substantially the same shape as the contact plate portion 12, and has an arc-shaped recess 18, a jack support portion 19, and an arc-shaped notch 20 corresponding to the contact plate portion 12. To prepare. The arcuate recess 18 has a curvature that rides on the outer circumference of the outer cylinder 52. The notch 20 faces the notch 17, and the edges of both are connected by a notch cylindrical portion 21.

As shown in FIGS. 8 to 10, the pair of left and right screw jacks 3 have basically the same structure, and the screw shaft 4 is advanced and retracted in the axial direction by a worm 23 and a worm wheel 24 installed in the casing 22. is there.

The casing 22 is mounted on the substrate 25 and includes a worm support portion 26 and a worm wheel support portion 27. The substrate 25 is positioned and joined to a predetermined position on the front surface of the abutting plate portion 12 of the mounting member 2 by a plunger pin 28 (which is inserted into the receiving hole 12a in FIG. 5).

The worm support 26 includes a substrate 25, a front plate 29 facing the substrate 25 in parallel with a space therebetween, and a pair of parallel bearing plates 30 and 31 forming a rectangular frame together with the plates 25 and 29.

The worm 23 is supported between the bearing plates 30 and 31, and rotates in conjunction with the drive gear 32 supported by one bearing plate 30. The drive gear 32 includes a spline hole 32a (FIGS. 8 and 9) that communicates with the outside through an insertion hole that penetrates the bearing plate 30. The drive gear 32 is driven by the drive shaft 6 (FIGS. 2 and 3) inserted through the spline hole 32a.

The worm wheel support portion 27 includes a substrate 19, a cylindrical wheel cover 33 fixed to the front surface side thereof, an end plate 34 closing the front surface side thereof, and a guide tube portion 35 (FIGS. 8 and 9). It is equipped with.

The cylindrical wheel cover 33 is fixed to the substrate 19 with its axis oriented in the front-back direction orthogonal to the substrate 19. The guide tube portion 35 is concentric with the wheel cover 33, penetrates the substrate 19 from the wheel cover 33, and extends rearward. The screw shaft 4 penetrates the wheel cover 33 and is inserted in the front-rear direction so as to mesh with the internal gear of the worm wheel 24 inside thereof.

The screw shaft 4 can be constructed as a single screw shaft 4 according to the required drawing length of the inner cylinder 53. However, in the embodiment shown in FIGS. 12 to 14, the screw shaft 4 is constituted by the tip shaft 37 and the extension shaft 38. To be done.

The tip shaft 37 has a clevis 36 at its tip, and the extension shaft 38 is connectable and separable at the rear end of the tip shaft 37. Further, the extension shaft 38 may be composed of another single or a plurality of ones that can be connected/disconnected at the rear end.

As shown in FIGS. 12 and 13, the front end shaft 37 is provided with a keyway shaft hole 39 and a screw hole 40 concentric therewith and having a smaller diameter than the shaft hole 39 at the rear end. As shown in FIGS. 12 and 14, the extension shaft 38 includes a shaft body 41 and a connecting bolt 42.

The shaft body 41 is provided with a shaft hole 43 with a key groove similar to the front shaft 37, a screw hole 44 on the rear end side, and a bolt receiving hole 45 which is continuous with the shaft hole 43 and extends over the entire length thereof. And a convex shaft 46 with a key that fits in. The connecting bolt 42 includes a bolt main body 47 having a hexagonal hole, and a screw cylinder 48 screwed to a tip portion of the bolt main body 47. The bolt main body 47 is rotatably inserted into the bolt receiving hole 45, and the screw cylinder 48 is screwed and fixed to the tip end portion of the shaft main body 41 protruding toward the tip end side. The screw cylinder 48 is screwed into the screw hole 40 of the tip shaft 37 by rotating around the shaft integrally with the bolt body 47.

As shown in FIG. 3, the connecting member 5 penetrates between the forks of the clevis 55 provided at the tip of the inner cylinder 53 and extends in the direction orthogonal to the axis of the inner cylinder 53, and the tip clevis 36 of the pair of screw shafts 4 is provided. Supported in between. The clevis 55 of the inner cylinder 53 is connected to the end of the overhead wire via an insulating member.

As shown in FIGS. 1 to 3, in the pair of screw jacks 3, the plunger pin 28 is inserted into the receiving hole 12a of the abutting plate portion 12, and the guide cylinder portion 35 is fitted into the notched cylinder portion 21. , Is attached to the jack support portion 15 of the attachment member 2. Accordingly, the pair of screw jacks 3 are mounted on the front surface side of the mounting member 2 such that the axes of the spline holes 32a (FIG. 1) of the drive gear 32 are aligned with each other in the direction orthogonal to the axis of the outer cylinder 52.

The drive shaft 6 is composed of a spline shaft that is inserted into and removed from the spline holes 32a of the pair of screw jacks 3 that match each other, and is provided with a drive operation unit such as a chain sprocket 6a on one end side. The drive operation section is not limited to this, and various other specific forms such as a wrench engagement section that can be independently rotated by an operator at a high place can be adopted.

After the mounting member 2 and the screw jack 3 are mounted on the outer cylinder 52 of the tension balancer 51, the drive shaft 6 is inserted into the matched spline hole 32a, and when this is rotated, the drive gear 32, the worm 23, and the worm wheel 24. The screw shaft 4 advances and retracts in the front-rear direction via the.

For example, when a new overhead wire is installed, the pull-out device 1 is attached to the tension balancer 51 installed at a high place and not yet connected to the overhead wire, and the screw shaft 4 connected to the clevis 55 of the inner cylinder 53 is attached. By pushing it forward, the inner cylinder 53 is pulled out from the outer cylinder 52 against the spring force to a predetermined position where a required tension with respect to the overhead wire is obtained.

At this time, when the length of the tip shaft 37 of the screw shaft 4 is insufficient with respect to the required pull-out length of the inner cylinder 53, after the tip shaft 37 is made to project close to the maximum projection length, the rear end The extension shaft 38 is connected to. If the shortage still occurs, the entire screw shaft 4 is projected to the vicinity of the rear end portion of the extension shaft 38, and then the additional extension shaft 38 is connected. By pushing the tip shaft 37 forward by the extension shaft 38, a required pull-out length can be easily ensured. Since each extension shaft 38 is set to a length that does not interfere with the connection portion of the tension balancer 51 with the support arm 54 when connected, there is no hindrance to the work.

After pulling out the inner cylinder 53 for a predetermined length, the clevis 55 is connected to the overhead wire, the screw shaft 4 is retracted, and the pulling device 1 is detached from the tension balancer 51. It is held by the support structure under tension.

A supplementary description will be given of the situation in which the present invention is utilized. An overhead line for a train track may flow entirely downward at a slope or may expand or contract more than expected due to temperature changes. As a result, the position of the overhead wire support member changes or the tension changes. This affects current collection performance and equipment wear, so it is necessary to correct it. In this case, conventionally, by operating a turnbuckle provided between the overhead wire and the tension balancer 51 in advance, the length of the overhead wire is substantially changed (approximately 10 to 30 cm). However, since it is difficult to rotate the turnbuckle under tension, it is necessary to pull the turnbuckle between the two sides of the turnbuckle with a pulling device before work to eliminate the tension on the turnbuckle. As such, not only the work is complicated, but also when the overhead line is deformed at the connection position of the drawing device, the correction work is required. On the other hand, if the pulling-out device 1 of the present invention is used, by changing the pulling-out length of the inner cylinder 53 without using a pulling device or the like, the whole overhead wire that has flowed downward can be returned to the upper part of the slope. Therefore, the tension of the overhead wire can be properly adjusted.

The drawer device 1 described above has versatility that it can be used for various purposes, but in any case, the tension of the overhead wire is directly adjusted without the need for a drawing step performed by connecting the drawing device or the like to the overhead wire. It can be performed. The overhead line to be applied is not limited to the one for train tracks.

DESCRIPTION OF SYMBOLS 1 Drawer 2 Mounting member 3 Screw jack 4 Screw shaft 5 Connecting member 6 Drive shaft 7 First member 8 Second member 9 Spacer 10 Bolt 11 Locking part 12 Contact plate part 12a Pin receiving hole 13 Rear end plate part 14 Circle Arc-shaped recess 15 Jack support 16 Inner flange 17 Arc-shaped notch 18 Arc-shaped recess 19 Jack support 20 Arc-shaped recess 21 Notched cylinder 22 Casing 23 Worm 24 Worm wheel 25 Substrate 26 Worm support 27 Worm wheel support 28 Plunger Pin 29 Front plate 30 Bearing plate 31 Bearing plate 32 Drive gear 32a Spline hole 33 Wheel cover 34 End plate 35 Guide cylinder 36 Clevis 37 Tip shaft 38 Extension shaft 39 Keyed shaft hole 40 Screw hole 41 Shaft body 42 Connecting bolt 43 Key Attached shaft hole 44 Screw hole 45 Bolt receiving hole 46 Keyed convex shaft 47 Bolt body 48 Screw cylinder 51 Spring type tension balancer 52 Outer cylinder 53 Inner cylinder 54 Oblique support arm 55 Clevis

Claims (3)

An outer cylinder having a built-in spring, the base end side of which is locked at a high place of the support structure, and a telescopically inserted outer cylinder arranged so that the tip projects toward the tip side of the outer cylinder. An inner cylinder that is biased in a direction of pulling toward the base end side of the outer cylinder, and a tip end side of the inner cylinder of the spring type tension balancer in which an overhead wire is connected to a front end side of the inner cylinder to a predetermined position. A device for pulling out from the tip side of the outer cylinder,
A mounting member that is detachably suspended on the outer cylinder, and a pair of screws that releasably supported by the mounting member and project a screw shaft whose axis is parallel to the axis of the outer cylinder toward the tip of the outer cylinder. A jack, a connecting member that detachably connects the screw shaft to the distal end side of the inner cylinder, and a drive shaft for simultaneously driving the pair of screw jacks,
The pair of screw jacks respectively include drive gears facing each other so that mutual spline holes are arranged on the same axis orthogonal to the axis of the outer cylinder,
The pull-out device for an overhead wire spring tension balancer, wherein the drive shaft is provided with a drive operating portion at one end side and is a spline shaft that can be inserted into and removed from a spline hole of the drive gear. The screw shaft includes a tip shaft coupled to the tip side of the inner cylinder via the connecting member, and an extension shaft connectable to an end of the tip shaft in a direction opposite to the pull-out direction of the inner cylinder. The pull-out device for a spring tension balancer of an overhead wire according to claim 1. The mounting members respectively hold screw jacks and can be coupled and separated in the radial direction of the outer cylinder, and the first member and the second member corresponding to the difference in radius of the outer cylinder. 3. A pull-out device for an overhead wire spring tension balancer according to claim 1, further comprising a spacer selectively interposed between the member and the member.

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