Transport installation with aerial rope conveying chairs and gondola cars

Abstract

A transport installation with a continuous running aerial rope supports chairs and gondola cars coupled by detachable grips. The rope extends in a closed loop between two bull-wheels, with an up-line and a down-line. The installation presents loading/unloading terminals provided at least at the ends of said lines. One of the terminals comprises a transfer circuit connecting the up-line and the down-line, with a slowing-down section equipped with a slowing-down device, a speeding-up section equipped with a propelling device, connected by a run-through section with a low running speed equipped with a driving device of the vehicles. The transfer circuit comprises a continuous running speed regulating section equipped with a speed regulating means that is able to vary the time required by the cars and the chairs to pass through the speed regulating section, to impose a first predetermined running speed of the cars and a second predetermined running speed of the chairs.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Other advantages and features will become more clearly apparent from the following description of particular embodiments of the invention given as non-restrictive examples only and represented in the accompanying drawings, in which:

FIG. 1 is a schematic top view of a bottom terminal of an example of an installation according to the invention,

FIG. 2 is a second schematic view of the bottom terminal of FIG. 1 where the vehicles are different,

FIG. 3 is a schematic top view of a top terminal of the example of an installation,

FIG. 4 is a partial view of the run-through section of the bottom terminal of FIGS. 1 and 2 showing details of an example of the speed regulating section according to the invention.

DESCRIPTION OF PARTICULAR EMBODIMENTS

In the figures, an aerial rope 10 of a transport installation extends in a closed loop between two loading/unloading terminals 11, 12, respectively bottom and top terminals, passing in the terminals on bull-wheels 13, one whereof, the drive bull-wheel, drives the rope 10 continuously. The rope 10 supports gondola cars 14 and chairs 15 coupled by detachable grips staggered along the rope in a predetermined combination. The transport installation can comprise other intermediate terminals located along the up-line 16 and the down-line 17 of the rope 10 for loading and/or unloading passengers to and from the vehicles 14, 15.

FIGS. 1 and 2 illustrate the bottom terminal 11. At the entry to the terminal 11, the vehicles are detached from the down-line 17 and run on a transfer circuit 18 at reduced speed in the terminal 12 until they reach the up-line 16. A slowing-down device 19 slows down the vehicles 14, 15 detached from the rope 10, whereas at the exit a propelling device 20 re-accelerates them to a speed equal to that of the rope to enable them to be recoupled to the rope 10 without jerking. The slowing-down device 19 and propelling device 20 are both formed by a set of tire-clad wheels staggered along a portion of the transfer circuit 18, respectively a slowing-down section A and a speeding-up section B, so as to operate by friction in conjunction with a friction track supported by the grips of the vehicles 14, 15. The wheels of the slowing-down device 19 and of the speeding-up device 20 are coupled by means of belts engaged on auxiliary pulleys fitted coaxially to the wheels. Each wheel is fixedly secured to two auxiliary pulleys, each respectively operating in conjunction with a belt, one of the belts engaging on one of the auxiliary pulleys of one of the adjacent wheels and the other of the belts operating in conjunction with one of the auxiliary pulleys of the other of the adjacent wheels. For driving, at least one of the wheels of each of the devices 19 and 20 can be connected by means of a belt to a driving power take-off branched-off from the rope 10 or the bull-wheel 13. Such devices are well-known and do not need to be described in greater detail here.

The slowing-down section A and speeding-up section B are connected by a run-through section C along which the vehicles 14, 15 run in continuous manner at reduced speed by means of a driving device 21 formed by sets of tire-clad wheels 22. The driving device 21 of the run-through section C is subdivided into three successive portions each delineating an elemental section S1, S2, S3 and able to have differential driving speeds. The wheels 22 of the semi-circular part of the run-through section C, within any one portion, are driven in synchronism with one another by idler pinions 23 (FIG. 4) intercalated between transmission pinions 24 mounted coaxially with the wheels 22. The rest of the wheels 22 of the run-through section C, in the straight portion of either section S1 or S3, are driven together in the same way as the wheels of the slowing-down device 19 and speeding-up device 20. The portion which delineates the section S2 is comprised of five wheels 22 and separated from the other two portions by removal of an idler pinion 23. One of the wheels 22 of the portion delineating the section S1 is driven in rotation by one of the wheels of the slowing-down section A. In like manner, one of the wheels 22 of the portion delineating the section S3 is driven in rotation by one of the wheels of the speeding-up section B. To drive the five wheels 22 of the portion delineating the section S2, a variable-speed motor 25 (FIG. 4) drives a transmission belt 26 stretched between two pulleys one whereof is mounted coaxially with one of the idler pinions 23.

In the bottom loading/unloading terminal 11, a loading/unloading platform 27 for loading in and unloading from the gondola cars 14 is arranged along the sections S1 and S2. The speed of movement of the vehicles 14, 15 in the sections S1 and S2 is very low, for example about 0.25 m/s. A loading location 28 on the chairs 15 is further arranged in coincident manner with the area covered by the chairs 15 along the section S3 to allow skiers entering via an access gate 29 to sit down on the chairs 15. The speed of movement of the vehicles 14, 15 when passing the loading location 28 is about 1 m/s. To reach this speed, the vehicles 14, 15 are accelerated in identical manner on the section S3 as soon as they have left the section S2.

In opposite manner, the vehicles 14, 15 running in the top loading/unloading terminal 12 (FIG. 3) first encounter an unloading location 30 of the chairs 15 then run alongside a loading/unloading platform 27 for loading in and unloading from the cars, these two locations 27, 30 being staggered along the transfer circuit of the top terminal 12 in the direction of movement of the vehicles 14, 15.

With reference to FIG. 2, the motor 25 that performs driving of the five wheels 22 of the portion delineating the section S2 is controlled by a control unit 31, for example a controller, which can perform other functions, in particular that of control and monitoring of any installation. The control unit 31 receives a passage signal 32 representative of passing of the vehicles 14, 15, supplied by a presence sensor 33 arranged along the section S1 and providing a pulse each time a vehicle 14, 15 passes. It also receives a selection signal 34 from a detection means 35 provided upline from the section S2, arranged at a specific location between the slowing-down section A and the section S2, and able to determine the type of vehicle 14, 15 entering an associated zone, i.e. enabling recognition of a chair 15 or of a gondola car 14. The control unit 31 also receives a clock signal 36 emitted by a detector (not shown) operating in conjunction with the bull-wheel 13 and emitting pulses synchronized with the running of the rope 10. The output of the control unit 31 delivers a control signal 37 to the motor 25 so as to ensure suitable control of the motor 25 for a predetermined regulation of the speed of the vehicles 14, 15 on exit from the section S2, in the manner which will be described further on. The section S2 is hereinafter called the speed regulating section S2.

The speed regulating section S2 according to the invention operates in the following manner: a vehicle, whether it be a gondola car 14 or a chair 15, entering the bottom terminal 11 is detached from the aerial rope 10 and runs along the transfer circuit 18 being propelled by the tire-clad wheels of the sections A, C, and then B. The wheels of the slowing-down section A slow the vehicle 14, 15 down, whereas the following wheels 22 of the section S1 move along the platform 27 until they reach the detection means 35 arranged along the section S1 at the entry to the speed regulating section S2. Passing of the vehicle 14, 15 in the detection zone associated with the detection means 35 generates a selection signal 34 which is transmitted to the control unit 31. The latter further comprises a memory for recording the selection signals 34. From this data, the control unit 31 determines the type of vehicle 14, 15 that is about to enter the speed regulating section S2 and also the type of the previous vehicle 15, 15, seen in the direction of movement, which has partially or completely passed through the speed regulating section S2. The control unit 31 uses this data to determine the theoretical time interval that ought to separate the vehicle 14, 15 about to enter the speed regulating section S2 and the previous vehicle 14, 15 when leaving the speed regulating section S2. The theoretical time interval separating two successive vehicles 14, 15 at the exit from the speed regulating section S2 is such that the physical distance between these two vehicles corresponds to the distance required, according to their respective type, to prevent them from bumping into one another in the curve of the slowest part of the run-through section C. The distances required between two successive vehicles 14, 15, depending on their respective type, are pre-recorded in the control unit 31. Thus, to establish the theoretical time interval, the control unit 31 determines the drive speeds procured by the driving device 21 along the sections S1 and S2, i.e. at the places where the driving speed is lower and where the vehicles 14, 15 are in a curve. The relations establishing the theoretical time intervals according to the driving speeds are pre-recorded in the control unit 31. The driving speeds are determined by the control unit 31 from the clock signal 36.

The vehicle 14, 15 then passes in front of the presence sensor 33 which sends a passage signal 32 to the control unit 32, generally in the form of a pulse, which control unit incorporates a means for counting the time elapsed between two successive passage signals 32. The control unit 31 therefore establishes the actual time interval that separated said vehicle 14, 15 and the previous vehicle 14, 15 before said previous vehicle 14, 15 passes through the speed regulating section S2.

By comparison between the theoretical time interval and the actual time interval measured, the control unit 31 is able to detect any deviation due to inevitable staggers liable to occur during operation (different braking and acceleration conditions from one vehicle 14, 15 to the other, variable loading of the vehicles 14, 15, variable climatic conditions, etc.). The deviation is determined before the vehicle 14, 15 reaches the speed regulating section S2.

Then, when the vehicle 14, 15 runs through the speed regulating section S2, the control unit 31 uses a suitable control signal 37 to perform speed control of the variable speed motor 25 in such a way that the time the vehicle 14, 15 takes to pass through the section is modulated to compensate for the deviation determined above.

Consequently, the speed regulating section S2 is equipped with a speed regulating means formed by the control unit 31, the presence sensor 33, the detection means 35, the variable speed motor 25, and the detector delivering the clock signal 36. According to the invention, the above speed regulating means are able to vary the time spent in the speed regulating section S2 by the cars 14 and by the chairs 15 to impose a differential speed with a first predetermined speed of running of the cars 14 and a second predetermined speed of running of the chairs 15. Moreover, the speed regulating section S2 imposes a third predetermined speed of running on a vehicle 14, 15 passing through said speed regulating section S2 when the previous vehicle 14, 15 is of a different type from said vehicle 14, 15, the third predetermined speed being comprised between the first and second predetermined speeds. The first, second and third predetermined speeds correspond to a time interval between a vehicle 14, 15 leaving the speed regulating section S2 and the previous vehicle, seen in the direction of movement. At each passage of a vehicle 14, 15, the time interval to be obtained on exit from the speed regulating section S2 with respect to the previous vehicle is determined by the control unit 31 before said vehicle reaches the speed regulating section S2 according to the type of said vehicle and of the type of said previous vehicle. The predetermined speeds are modulated according to the speed of the aerial rope 10 by means of the clock signal 36.

This arrangement enables the time interval between two successive vehicles 14, 15 of the same type to be adjusted according to the physical distance necessary between two vehicles of the same type to prevent them from bumping into one another in the sections S1 and S2. It thereby becomes possible to provide successive groups of cars 14 without this considerably reducing the user throughput. The spacing combination of the vehicles 14, 15 on the aerial rope 10 can be customized at will. The cars 14 are spaced further apart from one another than the chairs 15 are. The time interval between two chairs 15 is represented by t1 in FIGS. 2 and 3. Furthermore, the time interval between a chair 15 and a car 14 is optimized to prevent them from bumping into one another in the sections S1 and S2. This time interval is represented by t2 in FIGS. 2 and 3. t1 and t2 are respectively, in the example, about 7.2 s and 8.64 s. The time interval (not represented) between two successive cars 14 is, for its part, about 12 s. In FIG. 2, it can be seen that t1 is such that the first two chairs 15 are very close to one another in the curve of the section S1. FIG. 3 illustrates that t2 is chosen in such a way that a chair 15 and a car 14 are very close to one another in the last curve of the run-through section of the loading/unloading terminal 12.

A speed regulating section S2 according to the invention enables the user throughput to be increased by optimizing the time interval between two successive vehicles 14, 15 according to the physical distance just necessary between these two vehicles 14, 15, depending on their respective type, to prevent to prevent them from bumping into one another in the sections S1 and S2. The length of the speed regulating section S2 is chosen such as to be sufficient to compensate the maximum deviations that are liable to occur. The speed associated with a vehicle 14, 15 is re-established at each passage through the speed regulating section S2.

In most cases, the distribution deviations are small and it is sufficient to equip one of the loading/unloading terminals 11, 12 with a speed regulating section S2 according to the invention, which section is preferably arranged at the arrival of the least used line 16, 17.

The invention is not limited to the described embodiment. It can be applied to different types of speed regulators, the implementation mode having to be adapted to the type of speed regulator used. The speed regulating section S2 can be arranged at any location on the transfer circuit 18. With suitable management of the memory of the control unit 31, the detection means 35 can be arranged at any point on the path of the vehicles 14, 15 anywhere in the transport installation. The run-through section C can be of any shape and can for example reproduce the teachings of French Patent applications 0501777 and 0304989 in order to increase the user throughput even further. Finally, the individual driving means of the sections delineating the sections S1 and S3 can consist of independent variable speed motors, for example controlled by the control unit 31. Mechanical driving of the vehicles 14, 15 can be performed by any other suitable means along the slowing-down section A, the speeding-up section B, and the portions delineated by the sections S1 and S3 of the driving device 21, for example by drive belts with external splines.

Claims

1. Transport installation with a continuous running aerial rope, supporting vehicles composed of chairs and gondola cars coupled by detachable grips and staggered along the rope in a predetermined combination and with a predetermined running speed, said rope extending in a closed loop between two bull-wheels, with an up-line and a down-line, said installation having loading/unloading terminals provided at least at the ends of said lines, at least one of the loading/unloading terminals comprising: detachment means, on entry, to detach the grips from the rope,engagement means, on exit, to recouple the grips and the rope,a transfer circuit connecting the up-line and the down-line of the rope, with a slowing-down section equipped with a slowing-down device, and a speeding-up section equipped with a propelling device, connected by a run-through section with a low running speed equipped with a driving device of the vehicles,a first location for loading/unloading into/from the cars and a second location for loading on or unloading from the chairs, staggered along the transfer circuit,and a continuous running speed regulating section arranged in the transfer circuit to perform said speed regulation of the vehicles,

2. Installation according to claim 1, wherein the speed regulating section imposes a third predetermined running speed on a vehicle passing through said speed regulating section when the previous vehicle, seen in the direction of movement, is of a different type from said vehicle, the third predetermined running speed being comprised between the first and second predetermined running speeds.

3. Installation according to claim 1, wherein the driving device of the run-through section is subdivided into several successive portions able to have differential driving speeds, each of said portions delineating an elemental section of the run-through section, and the speed regulating section coincides with one of said elemental sections.

4. Installation according to claim 3, wherein each portion of the driving device of the run-through section is equipped with an individual driving means of the vehicles.

5. Installation according to claim 4, wherein the driving device of the run-through section comprises sets of tire-clad wheels driving the vehicles by friction, the wheels of one and the same section being driven in synchronism by the corresponding individual driving means.

6. Installation according to claim 5, wherein the wheels of the portion delineating the speed regulating section are driven by a variable speed motor.

7. Installation according to claim 4, wherein the speed regulating means comprise a detection means provided outside the speed regulating section and able to determine the type of vehicle entering an associated detection zone and to transmit a selection signal to a control unit able to control the individual driving means of the portion delineating the speed regulating section.

8. Installation according to claim 7, wherein at each passage of a vehicle, the control unit controls the individual driving means of the speed regulating section according to the selection signal corresponding to said vehicle so as to modulate the time taken by said vehicle to pass through said speed regulating section to compensate for any deviation with respect to the predetermined speed associated with said vehicle.

9. Installation according to claim 8, wherein the detection means are arranged at a fixed location between the slowing-down section and the speed regulating section.

10. Installation according to claim 8, wherein the control unit comprises a memory for recording the selection signal, and the predetermined speed associated with a vehicle leaving the speed regulating section corresponds to a time interval between said vehicle and the previous vehicle, seen in the direction of movement, said interval to be obtained on exit from the speed regulating section being determined by the control unit, before said vehicle passes through the speed regulating section, according to the type of said vehicle and the type of said previous vehicle.

11. Installation according to claim 7, wherein the speed regulating means comprise a presence sensor arranged at a specific location along the run-through section, upline from the speed regulating section, and able to transmit a passage signal representative of passing of the vehicles to the control unit.

12. Installation according to claim 11, wherein the control unit comprises a means for counting the time elapsed between two successive passage signals.

13. Installation according to claim 7, wherein the control unit receives a clock signal synchronized with the aerial rope so as to modulate the predetermined speeds according to said clock signal.