JPH03213457A - Pulley shaft interlocking type hydraulic stretching device for ropeway - Google Patents

Abstract

PURPOSE:To eliminate the need for an electric motor for hydraulic stretch by coupling a hydraulic pump run in linkage with rotation of a pulley shaft to the pulley shaft through a coupling means, and feeding pressure oil generated with the aid of the hydraulic pump to a hydraulic cylinder to stretch a ropeway. CONSTITUTION:In a fixed circulation type ropeway wherein a cable 3 is wound endlessly round a motive pulley 4 and a stretch pulley 9 and therebetween, a reduction gear 6 and an electric motor 7 are arranged on a motive frame 8 erected on a terminal 1 at the foot of a mountain to rotate the motive pulley 4. In this case, a slide frame 10 slid over and guided by a stretch frame 12 erected at a terminal 2 at the top of a mountain is provided. Through longitudinal movement of the slide frame 10 by means of a hydraulic cylinder 13, tension is exerted on the cable 3 through the stretch pulley 9 pivotally supported on the slide frame 10. Pressure oil generated with the aid of a variable volume pump 50 run through a gear train by rotation of the stretch pulley 9 is fed to and discharged from the hydraulic cylinder 13 through the working of a hydraulic unit 14.

Description

[Detailed Description of the Invention] [Industrial Application Field] The above-mentioned cable is wound between pulleys pivotally installed at terminals (terminals) at both ends (the same shall apply hereinafter), and a carrier is suspended to circulate the cable. This invention relates to a hydraulic tensioning device for cableways for tensioning between pulleys.

[Prior Art] In the past, a weight type was often used as a cableway tensioning device, but recently, a hydraulic tensioning type has become mainstream. Currently, pressurized oil is supplied to the cylinders of such a hydraulic tensioning device using a separate electric motor.

That is, as an example of a hydraulic circuit for operating a hydraulic cylinder of a conventional hydraulic tensioning device, Japanese Patent Laid-Open No. 59-1340
A hydraulic circuit diagram proposed in Publication No. 51 [Hydraulic Tensioning Device for Cableway] is shown in FIG. The variable displacement pump 50 is connected to a driving electric motor 82 and rotated at a constant rotational speed, and discharges pressure oil to a discharge line 84. The pressure oil in the discharge line 84 is fed back to the variable displacement pump 50, and when this pressure changes from low pressure to set pressure to overpressure, the discharge amount maximum (pump) to the discharge amount 0 to the discharge amount minus (the variable displacement pump 50 changes the hydraulic pressure). is discharged to the tank 83 side.) When the electromagnetic valve 81 is energized, the discharge pressure of the variable displacement pump 50 acts on the check valve 63, allowing pressure oil to pass therethrough. Further, when the electric motor 82 is stopped and the rotation of the variable displacement pump 50 is stopped, the pressure oil cannot pass through the pylon 1 check valve 63, and the pressure in the hydraulic cylinder 13 is maintained. The relief valve 61 operates when the pressure exceeds a certain level, allowing pressure oil to pass through, returning the pressure oil to the tank 83, and lowering the pressure in the discharge line 84, causing damage to each device arranged in the hydraulic units 1 to 80. It plays the role of a safety device to prevent this. Further, the pressure switch 62 is a hydraulic device that detects an excessive drop in pressure in the discharge line 84 and stops the operation of the cableway. Further, the hydraulic cylinder 13 is equipped with a fuse valve 60,
When a sudden leakage of pressure oil occurs due to a rupture of the pipes 68, 69, etc., this acts to prevent a sudden pressure drop in the pressure oil cylinder 13.

The hydraulic cylinder 13 is connected to the hydraulic cylinder 13 by the hydraulic unit 80 having the above configuration.
The discharge amount is adjusted to follow changes in the load applied to the piston rod 13a, that is, changes in the tension of the cable.

[Problems to be Solved by the Invention] As mentioned above, in the conventional hydraulic tensioning device d3, the hydraulic pump for supplying pressure oil to the hydraulic cylinder and the drive system for the cableway are operated using separate electric motors. was.

Therefore, it is necessary to install the separate electric motor for hydraulic drive, and a power source is required to supply electric power to this electric motor.

In particular, in the case of so-called fixed-motor type cableway equipment in which the prime mover and the tension device are each provided in separate terminals, the power transmission and distribution line from the drive terminal to the tension terminal for supplying power to the electric motor is There was a problem in that the construction and maintenance costs for these were large.

In addition, since the cableway drive and the tension hydraulic drive are separate systems, in the unlikely event that the tension hydraulic drive stops due to an unexpected failure, the cableway equipment may be in normal operation even though the cableway equipment is in operation. Although it was rare, there was a risk that the tension movement would not be performed.

[Means for Solving the Problems] The present invention has been made to improve the above situation. That is, the present invention has a system that is connected to a pulley shaft via a connecting means and that is linked to the rotation of the pulley shaft. This is a cableway pulley shaft movement type hydraulic tensioning device, which is equipped with a hydraulic pump that rotates, and the hydraulic pump supplies pressure oil to a hydraulic cylinder so that the hydraulic cylinder is tensioned.

[Operation] In an automatic or fixed circulation cableway, the carriage is circulated by fixedly or removably gripping a cable wound between pulleys at both ends, and the carriage is operated.

A hydraulic pump is connected to the rotating shaft of the pulley via a gear device as a connecting means, for example.

The hydraulic pump is connected to a hydraulic cylinder through a circuit and piping of a hydraulic unit so that pressure oil can be supplied to the hydraulic cylinder.

When the cableway is in operation, the pulley and pulley shaft rotate as the cable moves. Along with this, the hydraulic pump connected by the connecting means is driven and pressurized oil is discharged. The pressure oil is supplied to a hydraulic cylinder via the hydraulic cylinder 1 and piping, expands and contracts the piston rod of the cylinder, and tensions the cable via the sliding frame and pulley.

[Example] The present invention can be implemented in both a fixed circulation cableway and an automatic circulation cableway.

First, the fixed circulation type cableway is driven by winding the cable 3 endlessly between a driving pulley 4 and a tension pulley 9, as shown in FIGS. 1(A) and 1(B). A plurality of carriers 17, 17.
. . . and the weight of the cable 3 to be circulated is transferred to the supports 15.15.・
16.16. It is guided and supported by...

In this embodiment, a speed reducer having a driving pulley 4 fitted to its output shaft and an electric motor 7 whose output shaft is connected to the input shaft of the speed reducer 6 are fixed on a driving frame 8 erected at a terminal 1 at the foot of the mountain. The cable 3 is driven.

On the other hand, a tension frame 12 is erected at the mountaintop terminal 2, and sliding rollers 11.11. A sliding frame 10, which is pivotally mounted thereon, slides on a tension frame 12 in the directions of arrows 18 and 19.

Further, a hydraulic cylinder 13 is pivotally attached to the tension frame 12, and a piston [Jrad 1
The tip end of 3a is hooked to the end of the sliding frame 10. Further, a hydraulic unit 14 that supplies pressure oil to the hydraulic cylinder 13 is also fixed to the tension frame 12-L. Therefore, the tension pulley 9 pivotally connected to the sliding frame 10 is also slid in the direction of arrow 18 or arrow 19 by the hydraulic cylinder 13, and the cable 3 wound around the tension pulley 9 is moved by the hydraulic cylinder 13.
It is designed so that tension is applied to it.

Next, FIG. 2 is a plan view of a case where a hydraulic tensioning device is used in an automatic circulation cableway. The cable 37, the folding pulley 27 arranged at the foot terminal 25, and the driving device 2 of the mountaintop terminal 26
It is wound around a driving pulley 29 pivotally mounted at 8 and circulated at high speed. Multiple carriers 38.38. ... is moved at high speed on the track by gripping the cable 37, which circulates at high speed, by a gripping device (not shown). Next, the carrier 38 that has arrived at the terminal 25 at the foot of the mountain from the track in the direction of the arrow 39 roams along the rope 37 and is decelerated by the deceleration transfer device 35, and travels at low or very slow speed on the elevated rail 34, which is semicircular in plan view. The aircraft will then be transferred to the departure side. Thereafter, after a passenger gets on the carrier 38, the acceleration transfer device 36 accelerates the carrier 38 from a low or very slow speed to the speed of the cable 37. At this time, the gripping device (not shown) of the carrier 38 again grips the rope 37 that is circulating at high speed, and
It is set out on the track in the direction. Next, when the carrier 38, which has been transported at high speed in the direction of arrow 40, arrives at the mountaintop terminal 26, the gripping device (not shown) of the carrier 38 again loops the rope 37 in substantially the same way as the terminal 25 at the foot of the mountain. The deceleration transfer device 32 reduces the speed from high speed to very low speed, and passengers disembark from the carrier 38, which becomes empty, and is transferred on the elevated rail 33 and turned to the departure side. When the carrier 38 transferred to the departure side is accelerated to the speed of the cable 37 by the acceleration transfer device 31, the gripping device (not shown) of the carrier 38 grips the cable 37 again. and is transported at high speed into the track in the direction of arrow 39. Multiple carriers 38.38.・
The cable 37, which is suspended and circulates at high speed, is supplied with pressure oil to the hydraulic cylinder 30 engaged with one end of the prime mover 28, in the same way as in the case of the fixed circulation type cableway, and the cable 37 is suspended and circulated at high speed. It is tensioned via two motive pulleys pivotally attached to the.

FIG. 3 is a partial sectional view showing a mechanism in which the rotation of the tension pulley 9 is transmitted to the variable displacement pump 50 by means of a connecting means. Tension frame 12 erected at the mountaintop terminal 2
A fixed boss 41 having a hollow interior is fixed to the sliding frame 10 that slides on the top, and a tension pulley 9 rotates via bearings 42 and 42 whose outer periphery is a sluice [the direction of which is positioned by a bearing retainer 45]. It is pivoted as possible. Furthermore, a connecting cap 43 having a spline 43a formed in the center is fixed to the lower part of the tension pulley 9, and the connecting cap 43 has a spline 43a formed in the center thereof.
The outer ring of 2.42 is pressed against the tension pulley 9 side. Next, a bevel gear 47a serving as a connecting means is fixed to one end of the hollow portion of the fixed boss 41, and a transmission shaft 44 having a spline 43a formed therein is attached to the bearing 4 at the other end.
6. Rotatably pivoted by 46 and spline 43a
is fitted into a connecting cap 43 fixed to the tension pulley 9. Next, the tension pulley 9 on the top surface of the sliding frame 10
A gear case 48 is fixed at the axial center position of the transmission shaft 44 and includes a bevel gear 47a of the transmission shaft 44 and a force helical gear 47b that meshes with the bevel gear 47a. Transmission shaft 7! A gear shaft 47C that intersects I6 at right angles is pivotally extended and connected to a speed increaser 49 mounted on the same side. The speed increaser 49 is also equipped with a generator 51 for charging a battery (not shown) that supplies power to a variable displacement pump 50 and a solenoid valve 65 in the hydraulic circuit diagram shown in FIG. 4, which will be described later. has been done.

The rotation of the tension pulley 9 is transmitted by the transmission shaft 44 to the bevel gear 47a in the gear case 48 by means of the connection means configured as described above.

After the rotation is turned horizontally by 47b, the rotation is input to the speed increaser 49, and the speed is increased by the speed increaser 49 to about the rotation speed of a conventional electric motor, and the variable displacement pump 50
rotates to generate pressure oil. At the same time, a battery charging generator 51 for supplying power to the solenoid valve 65 is also rotated.

FIG. 4 is a hydraulic circuit diagram showing control of operations when a variable displacement pump 50, which is a type of hydraulic pump, is driven by the connecting means and pressure oil generated is supplied to the hydraulic cylinder 13. When the hydraulic tensioning device is started, the solenoid valve 65
The solenoid 66a of the variable displacement pump 5 is energized, and the variable displacement pump 5 is energized.
When zero pressure oil is discharged to the discharge line 72a, the pressure oil passes through the solenoid valve 65, the pilot check valve 63 is closed, the pressure oil passes through the pilot check valve 63, and the hydraulic unit is opened. 1-14, a pipe 68 connected to the rod side of the hydraulic cylinder 13, and a fuse valve 60 inserted into the connection port of the pipe 68 on the rod side of the hydraulic cylinder 13.
and is supplied to the rod side of the hydraulic cylinder 13. At this time, the piston rod 13a of the hydraulic cylinder 13 is
The cable 3 is actuated to be retracted in the direction of 1, and a tension force is applied to the cable 3.

The tension is determined by the length of the cableway, that is, the slope distance and height difference between the terminal 1 at the foot of the mountain and the terminal 2 at the summit, and the carrier 17.1.
7. In the hydraulic circuit diagram shown in FIG. 4, the tension force is adjusted by adjusting the discharge pressure of the variable displacement pump 50. Furthermore, there is a relief valve 61 in the return line 72b branched from the discharge line 72a, and the pressure is adjusted to be slightly higher than the set discharge pressure of the variable displacement pump 50, and the pressure inside the hydraulic unit I-1/1 is adjusted to be slightly higher than the set discharge pressure of the variable displacement pump 50. This is designed to prevent damage to hydraulic equipment. There is also a pressure saw switch 62 in the return line 72c, and when the pressure in the discharge line 72a drops, that is, when the piston rod 13a of the pressure cylinder 13 slides in the direction of the arrow 18, the slack in the cable 3 in the track increases. Carrier 17, 17. Since the operation of ... will be disrupted, the operation will be stopped.

Next, cut down the cable 3 (make the stretched cable the appropriate length).

) or when replacing, do not loosen the cable 3. No.

In that case, when the stop valve 64 in the return line 72c is gradually opened, the oil on the rond side of the cylinder 13 passes through the fuse valve 60 and is transferred from the return line 72C to the tank 67.
At the same time, the discharged amount of oil passes through the return line 72b from the tank 67 and is sucked into the head side of the hydraulic cylinder 13, and the piston rod 13a moves in the direction of the arrow 18.

Next, when the tension pulley 9 is reversed, the variable displacement pump 50, which is rotated in conjunction with the connecting means, is also reversed so that oil is sucked from the discharge line 72a. 72d and check valve 7
Since the hydraulic oil is supplied to the variable sound fil pump 50 through the pump 3, the variable displacement pump 50 will not be damaged.

Further, the electromagnetic valve 65 is of a type in which current flows once through the solenoid 66a or the solenoid 66b and this state is mechanically maintained once the switching operation of the hydraulic circuit is completed, so there is no need to keep the current flowing. Further, the battery of the control power source is charged by rotating the generator 51 via the speed increaser 49 by the connecting means.

[Effects of the Invention] As mentioned above, conventionally, a variable displacement pump installed in a hydraulic unit and driven by a main electric motor is rotatably driven by a pulley around which a rope is wound through a connecting means. This system operates the hydraulic cylinder of the hydraulic tensioning device.

Therefore, there is no need for a separate electric motor for hydraulic tension, which has been used in the past, and there is no need for power transmission and distribution lines for supplying electric power thereto. J: Therefore, the necessary construction costs and maintenance costs are reduced, and especially in the case of cableway equipment in which the motive terminal and tension terminal are separated, the cost reduction effect is large.

In addition, since the hydraulic pump is connected to the pulley shaft and operated in conjunction with the stoppage of rotation of the pulley shaft, there is no risk that only the tension hydraulic system will stop unexpectedly even during cableway operation, ensuring safe operation. You can do this.

[Other Embodiments] The scope of the present invention includes the following application or implementation embodiments.

(1) The cableway according to the above claims, wherein the connecting means connected from the pulley shaft to the hydraulic pump is a gear device, and the gear device is configured to increase rotation speed. Pulley shaft motion type hydraulic tensioning device (2) The pulley shaft motion type hydraulic tensioning device for a cableway according to the claims, wherein the hydraulic pump is a variable displacement pump.

[Brief explanation of drawings]

Figure 1 (A) is a side view showing the overall configuration of the fixed circulation cableway, Figure 1 (B) is a plan view of the fixed circulation cableway, and Figure 2 is a plan view showing the overall configuration of the automatic circulation cableway. 3 is a partial sectional view showing a structure for transmitting the rotation of a tensioning pulley to a hydraulic pump by means of a connecting means, FIG. 4 is a hydraulic circuit diagram of a hydraulic tensioning device of the present invention, and FIGS. FIG. 2 is a hydraulic circuit diagram of a conventional hydraulic tensioning device. 1... Terminal at the foot of the mountain, 2... Terminal at the summit, 3... Cable, 4... Motive pulley, 5...
・Power unit, 6...Reducer, 7...Electric machine, 8
...Motive frame, 9...Tension pulley, 10...
Sliding frame, 11...Sliding roller, 12...Tension frame, 13...Hydraulic cylinder, 13a...
・Bis 1~Rod, 14...Hydraulic unit 1~, 15...Strut, 16・
...Leaf receiving device, 17...Carrier, 18.19...
Arrow, 20.21...Arrow, 25...Mountain base terminal, 26...Mountain top terminal, 27...Turning pulley, 28...Motive power unit, 29...Motive force pulley, 30...Hydraulic pressure Cylinder, 31... Acceleration transfer device, 32... Deceleration transfer device, 33... Elevated rail, 34... Elevated rail, 35... Deceleration transfer device, 36... Acceleration transfer device, 37... ... cable,
38...Carrier, 6 39.4.0...Arrow, 41...Fixed boss, 4
2...Bearing, 43...Connection cap, 4
3a... Spline, 44... Transmission shaft, 45...
...bearing holder, 46...bearing, /l
-7a, 47b...Bevel gear, 47c...Gear shaft, 48...Gear case, 4...Speed up gear, 5
0... Variable displacement pump, 51... Generator, 60
...Hiko's valve, 61...Relief valve, 6
2...Pressure switch, 63...Pylon 1 check valve, 6/4...
Stop valve, 65... Solenoid valve, 66 a,' 66
b... Solenoid, 67... Tank, 68.
69...Piping, 70.71...Rubber hose, 7
2a...Discharge line, 72b, 72c...Return line, 72d...Suction line, 73...Check valve, 80...Hydraulic unit 1~, 81...Solenoid valve,
82...Electric motor, 83...Tank, 84...
Discharge line 7 -1\- 9 0 a 6 2b 0 3

Claims (1)

[Claims] A hydraulic tensioning device for tensioning a cable that is wound around a pulley and moves in circulation, comprising a hydraulic pump that is connected to a pulley shaft via a connecting means and rotates in conjunction with the rotation of the pulley shaft, A cableway pulley shaft-linked hydraulic tensioning device that supplies pressure oil to a hydraulic cylinder using the hydraulic pump so that the hydraulic cylinder is tensioned.