JP7182491B2 - Drawer transfer device for spring tension balancer - Google Patents

Description

A spring-type tension balancer requires a process in which the inner cylinder is pulled out from the outer cylinder by a predetermined length against the spring force in order to obtain a predetermined tension when installed. INDUSTRIAL APPLICABILITY The present invention is used as a work support frame in the process of pulling out the inner cylinder in a balancer storage facility or the like, and after the process of pulling out is completed, it is used as a transport frame for transporting the tension balancer to the installation site. It relates to a pull-out transport device for a spring-loaded tension balancer.

Conventionally, in order to connect a spring-type tension balancer to an overhead line without adjusting the tension at the installation site, the desired length of the inner cylinder is pulled out from the outer cylinder in a facility such as a manufacturing factory that has the necessary equipment in advance. Tension adjustments are made. After the tension adjustment, the tension balancer is transported to the installation site with the outer cylinder and the inner cylinder fixed by the fixing device. The fixing device is removed after the tension balancer is connected to the overhead line. As this fixing device, one described in Patent Document 1 is known.

This device is detachably interposed between an outer cylinder (casing) and an inner cylinder (rod) of a spring-type tension balancer. A pair of pressure-resisting rods, one end of which is connected to the member and extends parallel to both sides of the inner cylinder for a predetermined length, and a pair of pressure-resisting rods extending in a direction perpendicular to the axis of the inner cylinder, the middle part of which engages a clevis (pull) of the inner cylinder. and a fixed yoke that is fixed and connected at both ends to the other ends of the pair of pressure-resisting rods. By attaching the fixing device to the tension balancer, the tension rod maintains the state in which the inner cylinder is pulled out from the outer cylinder against the spring force until a predetermined tension is obtained for the overhead contact line. After the tension balancer is installed, if the fixing device is removed, the tension balancer will hold the overhead contact line with a predetermined tension.

JP-A-2004-42780

Since the tension adjustment work of the tension balancer requires necessary facilities, the tension adjustment work cannot be performed in the facility where the tension balancer is stored after it is delivered from the manufacturing factory. For this reason, conventionally, the tension balancer is returned to a manufacturing factory or the like having the required equipment, and after the tension is adjusted, the tension balancer is transported from there to the installation site. When the tension balancer is transported from the manufacturing plant or the like to the installation site, it is mounted on a pallet with the tension balancer facing upward so that the attached tension indicator is not damaged. Since the tension balancer must be installed with the tension indicator facing downward, the tension balancer must be turned 180 degrees and lifted to a high place during the installation work. At this time, it is necessary to carefully proceed with the work so as not to damage the indicator, which is a factor in lowering work efficiency.
Therefore, the first object of the present invention is to support the tension balancer so that the tension adjustment work can be easily performed in a storage facility other than the manufacturing factory, and the transportation from there to the installation site and the installation work can be performed efficiently. Another object of the present invention is to provide a pull-out conveying device for a spring-type tension balancer that can be carried out at any time. A second object of the present invention is, in addition, to provide a spring-loaded tension balancer pull-out conveying device that allows the tension balancer conveying and installation operations to be carried out without damaging the indicator.

The following description refers to the reference numerals in the attached drawings, but the present invention is not limited thereto.
In order to solve the above-described problems, the pull-out conveying device 1 for a spring-type tension balancer of the present invention comprises a frame 100 for holding a balancer 400, a pull-out member 200 for pulling out an inner cylinder 420 from an outer cylinder 410 to a desired position, and a and a fixing member 300 that allows removal of the drawer member 200 by fixing the inner cylinder 420 to the outer cylinder 410 . The frame 100 includes an outer cylinder support portion 120 that horizontally fixes and holds the outer cylinder 410 , and cylinder locking portions 130 and 131 that detachably lock the hydraulic cylinder 220 of the drawer member 200 . The pull-out member 200 includes a pull-out metal fitting 210 detachably fixed to the tip of the inner cylinder 420 and a hydraulic cylinder 220 detachably fixed between the pull-out metal fitting 210 and the cylinder locking portions 130 and 131. equip. The fixing member 300 is provided between a fixed yoke 310 detachably fixed to the tip of the inner cylinder 420 pulled out to a desired pulled-out position by the pull-out member 200, and between the fixed yoke 310 and the tip of the outer cylinder 410. and a tension member 320 that is detachably interposed.

According to the pull-out conveying device 1 for the spring-type tension balancer of the present invention, the tension balancer 400 is supported on the frame 100, and the inner cylinder 420 is easily pulled out from the outer cylinder 410 by the pull-out member 200 to adjust the tension. After adjustment, the inner cylinder 420 can be fixed to the outer cylinder 410 by the fixing member 300, the drawer member 200 can be removed, the tension balancer 400 can be fixed as it is on the base 100, and the tension balancer 400 can be transported to the installation site. .

FIG. 4 is a front view of a pedestal in the pull-out conveying device for the spring-type tension balancer according to the present invention; FIG. 2 is a plan view of a pedestal of the drawer conveyor of FIG. 1; FIG. 2 is a side view of the cradle of the drawer conveyor of FIG. 1; FIG. 2 is a perspective view taken along line IV-IV in FIG. 1; FIG. 2 is a view taken along line VV in FIG. 1; FIG. 2 is a view taken along line VI-VI in FIG. 1; 1. It is a partial top view which shows drawing-out operation by the drawing-out conveying apparatus of FIG. 1 in order. 1. It is a partial top view which shows drawing-out operation by the drawing-out conveying apparatus of FIG. 1 in order. 1. It is a partial top view which shows drawing-out operation by the drawing-out conveying apparatus of FIG. 1 in order. 1. It is a partial top view which shows drawing-out operation by the drawing-out conveying apparatus of FIG. 1 in order. 1. It is a partial top view which shows drawing-out operation by the drawing-out conveying apparatus of FIG. 1 in order. 1. It is a partial top view which shows drawing-out operation by the drawing-out conveying apparatus of FIG. 1 in order. FIG. 8 is a side view of the drawer transport device in the state of FIG. 7; FIG. 11 is a side view of the drawer transport device in the state of FIG. 10;

Embodiments of the present invention will be described with reference to the drawings.
In FIGS. 1 to 3, a spring-type tension balancer 400 that adjusts the tension using the drawer/conveyor 1 and conveys the balance has a built-in spring, and its rear proximal end is locked to a support structure (not shown). and an outer cylinder 410 which is telescopically inserted into the outer cylinder 410 and arranged so that the front end thereof protrudes toward the distal end of the outer cylinder 410, and is pulled toward the base end of the outer cylinder 410 by a built-in spring. An overhead wire (not shown) is connected to the front tip side of the inner cylinder 420 to apply a constant tension to the overhead wire. The inner tube 420 includes an inner tube withdrawal length indicator 421 that extends radially downward from a forward tip and axially rearward along the outer circumference of the outer tube 410 . The tension balancer 400 is installed with the indicator 421 directed downward so that it can be visually recognized from below. The inner cylinder 420 has a clevis 422 on its distal end. The clevis 422 has first and second vertical lock holes 422a, 422b aligned in the longitudinal direction of the inner cylinder 420. As shown in FIG.

As shown in FIGS. 7 to 14, the drawer transport device 1 includes a base 100 holding a balancer 400, a drawer member 200 including a hydraulic cylinder 220 for drawing an inner cylinder 420 from an outer cylinder 410 to a desired position, and a drawer member 200. and a fixing member 300 that allows removal of the drawer member 200 by fixing the inner cylinder 420 to the outer cylinder 410 .

As shown in FIGS. 1 to 6, the gantry 100 includes a steel gantry body 110 having a rectangular parallelepiped truss structure with an open top, an outer cylinder support 120 that horizontally fixes and holds an outer cylinder 410, and a drawer member. Cylinder locking portions 130 and 131 for detachably locking the hydraulic cylinder 220 of 200 are provided. A pair of cylinder locking portions 130 are provided on the rear left and right sides, and a pair of cylinder locking portions 131 are provided on the front left and right sides.

A plurality of outer cylinder support portions 120 are fixed inside the gantry main body 110 so as to receive the outer cylinder 410 of the balancer 400 horizontally. Outer cylinder support part 120 is arranged separately to the left and right so as not to interfere with indicator 421, faces indicator 421 downward, and horizontally supports balancer 400 at a height position where indicator 421 does not touch the ground. A front end contact portion 140 is provided at the front end portion of the outer cylinder support portion 120 at the foremost portion. The front end abutment portion 140 abuts the left and right of the lower half of the front end portion of the outer cylinder 410 placed on the outer cylinder support portion 120 to restrain the forward movement of the balancer 400 .

As shown in FIGS. 7 and 10, the drawer member 200 includes a drawer metal fitting 210 detachably fixed to the tip of the inner cylinder 420, and a drawer metal fitting 210 detachably mounted between the drawer metal fitting 210 and the cylinder locking portions 130, 131. and a pair of hydraulic cylinders 220 fixed to.

The drawer fitting 210 passes through the clevis 422 horizontally in the left-right direction perpendicular to the axis of the inner cylinder 420, is locked in the first locking hole 422a of the clevis 422 at the intermediate portion by a bolt 211, and is locked at both ends. Piston rods 221 of a pair of hydraulic cylinders 220 can be connected.

The hydraulic cylinder 220 has a flange portion 222 locked to the cylinder locking portions 130 and 131 and is installed along the left and right side surfaces of the balancer 400 parallel to its axis.

In the illustrated embodiment, a relatively small hydraulic cylinder 220 is used due to the demand for downsizing of the frame. Therefore, when the pull-out length of the inner cylinder 420 is insufficient for the extension length of the hydraulic cylinder 220, the pull-out operation is performed in two stages.

That is, as shown in FIG. 7, when the hydraulic cylinder 220 is engaged with the rear cylinder engaging portion 130 and the first step of the pullout operation is performed, as shown in FIG. is fixed to the outer cylinder 410, the hydraulic cylinder 220 is removed from the rear cylinder locking portion 130, and as shown in FIGS. configured to perform a staged withdrawal operation; Therefore, as shown in FIG. 3, the rear cylinder locking portion 130 and the front cylinder locking portion 131 are installed at the center of the balancer 400 so as not to interfere with each other when the hydraulic cylinder 220 is attached and detached. It is shifted by 180° around the axis. Therefore, as shown in FIGS. 13 and 14 , the drawer fitting 210 is rotated by 180° and fixed to the clevis 422 when changing the locking position of the hydraulic cylinder 220 .

If the pull-out length of the inner cylinder 420 is sufficient for the extension length of the hydraulic cylinder 220, only one pair of the cylinder locking portions 130 and 131 is sufficient, and there is no need to perform the pull-out operation in two steps.

As shown in FIG. 8, the fixing member 300 fixes the inner cylinder 420 to the outer cylinder 410 at the pulled-out position, and is interposed between the inner cylinder 420 pulled out to a desired pulled-out position and the outer cylinder 410 . be done. The fixed member 300 includes a fixed yoke 310 fixed to a clevis 422 on the distal end side of the inner cylinder 420 and a tension member 320 interposed between the fixed yoke 310 and the distal end of the outer cylinder 410 .

The fixed yoke 310 penetrates the clevis 422 horizontally in the left-right direction perpendicular to the axis of the inner cylinder 420 , and is locked in a second locking hole 422 b of the clevis 422 with a square pin 311 at the intermediate portion.

The tension member 320 comprises a contact member 321 and a pair of extendable tension rods 322 . The abutting member 321 is made of a substantially semicircular arc-shaped plate material, and is arranged so as to abut on the upper half of the distal end portion of the outer cylinder 410 . One end of the pair of tension rods 322 is fixed to the contact member 321 and the other end is connected to both ends of the yoke 310 . The tension rods 322 are arranged horizontally on the left and right outer sides of the inner cylinder 420 in the installed state and extend forward in parallel with the inner cylinder 420 .

A process of drawing out the inner cylinder 420 using the drawer conveying device 1 of the illustrated embodiment will be described.

As shown in FIGS. 1 to 6, a balancer 400 is set on the drawer conveying device 1. As shown in FIG. At this time, the indicator 421 of the balancer 400 is directed downward, the clevis 422 is horizontally arranged, and the tip of the outer cylinder 410 is brought into contact with the front end contact portion 140 .

Next, as shown in FIGS. 7 and 13, the hydraulic cylinder 220 is locked to the first cylinder locking portion 130, and the drawer fitting 210 is fixed to the locking hole 422a of the clevis 422 with the bolt 211. Both ends are connected to the piston rod 221 . The hydraulic cylinder 220 is connected to a hydraulic machine (not shown), and the inner cylinder 420 is pulled forward by a predetermined length as indicated by the phantom lines.

Next, with the hydraulic pressure applied, as shown in FIG. The length of the tension rod 322 is adjusted by bringing it into contact with the tip, and the tip is connected to both ends of the fixed yoke 310 . Thus, the inner cylinder 420 is fixed at a predetermined pulled-out position with respect to the outer cylinder 410 . After the inner cylinder 420 is pulled out by the desired length by this pulling operation, the hydraulic pressure of the hydraulic cylinder 220 is released, the piston rod 221 is removed from the pull-out metal fitting 210, and the hydraulic cylinder 220 and the pull-out metal fitting 210 are removed. As shown, the withdrawal process ends.

When a second stage pullout operation is required, the pullout fitting 210 is rotated 180 degrees and connected to the clevis 422 as shown in FIG. The end of the piston rod 221 is connected to the drawer metal fitting 210 by being locked to the locking portion 131 . Pressurize the hydraulic cylinder 220 to slightly project the piston rod 221. After confirming that the load of the balancer 400 has been transferred to this, the tension rod 322 is removed from the fixed yoke 310, and the hydraulic cylinder 220 is moved as shown in FIG. Pressurization is again applied, and the second stage of drawing operation is performed to draw the inner cylinder 420 to a desired position.

11, the fixed yoke 310 is again attached to the second locking hole 422b of the clevis 422 with the square pin 311, and the contact member 321 of the tension member 320 is removed. By bringing the tension rod 322 into contact with the tip of the tube 410, adjusting the length of the tension rod 322, and connecting the tip of the tension rod 322 to both ends of the fixed yoke 310, the inner tube 420 is fixed to the outer tube 410 at the desired pulled-out position. .

Next, the hydraulic pressure of the hydraulic cylinder 220 is released, the piston rod 221 is removed from the drawer fitting 210, and the hydraulic cylinder 220 and the drawer fitting 210 are removed as shown in FIG.

The work up to this point can be performed in the storage facility of the balancer 400 using the drawer member 200 and the fixing member 300 attached to the gantry 100 .

In the state shown in FIG. 12 in which the inner cylinder 420 is pulled out from the outer cylinder 410 by a predetermined length by the first stage or second stage drawing operation, the balancer 400 is fixed to the pedestal 100 with a belt or the like. to transport the balancer 400 to the installation site.

At the installation site, the balancer 400 is released from the pedestal 100 on the ground, the balancer 400 is lifted up to a predetermined mounting height position with the fixing member 300 attached, and the rear end side of the outer cylinder 410 is connected to a support (not shown). At the same time, after the tip end of the inner cylinder is connected to an overhead power line such as a trolley line (not shown) to transfer the load to the overhead line, the fixing member 300 is removed to complete the installation of the balancer 400 . The balancer 400 is held on the pedestal 100 with the indicator 421 directed downward and in the same vertical direction as the installation posture.

1 drawer conveying device 100 pedestal 110 pedestal main body 120 outer cylinder support portion 130 first cylinder locking portion 131 second cylinder locking portion 140 front end contacting portion 200 drawer member 210 drawer fitting 211 bolt 220 hydraulic cylinder 221 piston rod 222 Flange 300 Fixed member 310 Fixed yoke 311 Square pin 320 Tension member 321 Contact member 322 Tension rod 400 Spring type tension balancer 410 Outer cylinder 420 Inner cylinder 421 Indicator 422 Clevis 422a First locking hole 422b Second locking hole

Claims (4)

an outer cylinder which incorporates a spring and whose rear base end side is engaged with the support structure; and the spring which is inserted telescopically into the outer cylinder and arranged so that the front end thereof protrudes toward the distal end side of the outer cylinder. The inner cylinder of a spring-type tension balancer that is biased in a direction to pull the outer cylinder toward the base end side by means of the inner cylinder, and that an overhead wire is connected to the distal end side of the inner cylinder and applies a constant tension to the overhead wire. is pulled out from the outer cylinder to a desired position and transported to the installation site,
A base for holding the balancer, a pull-out member including a hydraulic cylinder for pulling out the inner cylinder from the outer cylinder to a desired position, and removing the pull-out member by fixing the pulled-out inner cylinder to the outer cylinder. and a fixing member that allows
The pedestal includes an outer cylinder support portion that horizontally fixes and holds the outer cylinder, and at least a pair of cylinder locking portions that detachably lock the hydraulic cylinder,
The pull-out member includes a pull-out metal fitting detachably fixed to the tip of the inner cylinder, and at least a pair of hydraulic cylinders detachably fixed between the pull-out metal fitting and the cylinder locking portion. death,
The fixing member comprises a fixed yoke detachably fixed to the tip of the pulled-out inner cylinder, and a tension member interposed between the fixed yoke and the tip of the outer cylinder. A pull-out conveying device for a spring-loaded tension balancer, characterized by: the inner cylinder includes an inner cylinder pull-out length indicator extending radially downward from a forward tip and axially rearward along the outer circumference of the outer cylinder;
The gantry includes a steel gantry body having a cuboid truss structure with an open top,
A plurality of said outer cylinder support parts are fixed to the inner side of said gantry main body so that said outer cylinder is horizontally mounted and received at a height position where said indicator faces downward and said indicator does not touch the ground. Item 2. A pull-out conveying device for a spring-type tension balancer according to item 1. the inner cylinder has a clevis on the distal end side thereof, the clevis having first and second vertical locking holes arranged longitudinally of the inner cylinder;
The cylinder locking portion of the mount is arranged so as to be able to hold the hydraulic cylinder on both outer sides of the inner cylinder so as to extend in the front-rear direction in parallel with the axis thereof,
The drawer fitting passes through the clevis in the left-right direction perpendicular to the axis of the inner cylinder, is locked in the first locking hole of the clevis at the intermediate portion, and engages the piston rods of the pair of hydraulic cylinders at both ends. configured to be connectable,
the fixed yoke passes through the clevis horizontally in the left-right direction orthogonal to the axis of the inner cylinder, and is locked in a second locking hole of the clevis at an intermediate portion;
The tension member has an abutting member that abuts on the tip end side of the outer cylinder, and one end of which is connected to the abutting member, is arranged horizontally on the left and right outer sides of the inner cylinder and extends parallel to the inner cylinder, and the other end of the tension member is the yoke. 2. A pull-out conveying device for a spring type tension balancer according to claim 1, further comprising a pair of length-adjustable tension rods connected to both ends of the tension balancer. The pedestal includes the first cylinder locking portion arranged in the rear and the second cylinder locking portion arranged in the front,
The hydraulic cylinder is configured such that the locking position can be changed from the first cylinder locking portion to the second cylinder locking portion, so that the inner cylinder can be pulled out from the outer cylinder in two stages. 2. The pull-out conveying device for a spring-type tension balancer according to claim 1, wherein:

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