[0001] The present invention relates to a driving system for cableway installations of the
type including carrying cables and hauling cables.
[0002] It is known that cableway installations are divided into two wide-ranging categories:
"single cable" installations and "twin-cable" installations.
[0003] With the name of single-cable installations there are indicated those cableway installations
wherein a single cable (or, as the case may be, a single pair of parallel cables)
executes simultaneously both the function of carrying cable and the function of hauling
cable. With the name of twin-cable installations there are, on the other hand, indicated
those cableway installations with at least one, fixed, carrying cable and at least
one, movable, hauling cable.
[0004] Single-cable installations have two main drawbacks with respect to twin-cable installations.
In the first place, in a single-cable installation the carrying-hauling cable must
have a sufficiently large diameter to support the weight of the car; this determines
an increase in the weight of the masses in motion and an increase in the size of the
driving system with respect to the case of a twin-cable installation, wherein the
weight of the car is supported by the carrying cable and the hauling cable can thus
have a reduced diameter. In the second place, the possibility of tensioning the carrying-hauling
cable of a single-cable installation is always a great deal less than that of the
carrying cable of a twin-cable installation. Twin-cable installations are thus frequently
preferred over the single-cable type, in particular if cars of considerable dimensions
and weight are contemplated.
[0005] Twin-cable installations are known that for each car and corresponding pathway between
an upper station and a lower station comprise a single carrying cable or a twin carrying
cable; the car is suspended from the carrying cable, either single or twin, through
a cableway carriage, to which the car is in turn fastened through a suspension.
[0006] As is known, during their movement the cars are subjected to oscillations. Such oscillations
are usually distinguished into longitudinal oscillations, when they take place in
the vertical plane lying in the direction of forward movement of the car, and transversal
oscillations, when they take place transversally to the direction of forward movement
of the car (direction of the carrying cable).
[0007] With reference to longitudinal oscillations, the length of the suspension and the
inclination of the carrying cable are particularly important. In fact, the presence
of too short a suspension and of steep gradients of the carrying cable, it can happen
that during the longitudinal oscillations the car can touch the carrying cable and/or
the hauling cable, with consequent damage to both the car and the cables.
[0008] On the other hand, too long a suspension requires the construction of cableway stations
that are unnecessarily tall, and thus substantial costs for civil engineering works
and a frequently unacceptable environmental impact, particularly in the case of stations
built high up in the mountains.
[0009] It is thus recommended that cars be built with short suspensions.
[0010] Tranversal oscillations in turn require the car to be made to approach the station
at a very low speed.
[0011] In view of the described state of the art, the object of the present invention is
that of providing a driving system for cableway installations of the type comprising
carrying cables and hauling cables that allows the use of cars with suspensions of
a limited length, and that is not affected by the problems caused by the oscillations
of the cars.
[0012] According to the present invention, such object is achieved thanks to a driving system
for cableway installations of the twin-cable type, comprising:
- at least one pathway along which the respective car moves; and
- for said at least one pathway, a pair of parallel carrying cables, on which a carriage
for supporting the car moves slidably, and at least one hauling cable, characterized
in that
- said carrying cables are located at opposite sides of the car, at a reciprocal distance
greater than the width of the car;
- on the carriage of the car there are two pairs of freely rotatable compensation pulleys,
each pair of pulleys comprising a first pulley and a second pulley located symmetrically
in the proximity of the two sides of the carriage;
- for said at least one pathway there is a first section of hauling cable and a second
section of hauling cable, the first section of hauling cable comprising two parallel
branches extending from a first station to the car and located at a reciprocal distance
greater than the width of the car, and the second section of hauling cable comprising
two parallel branches extending from a second station to the car and located at a
reciprocal distance greater than the width of the car, said first section of hauling
cable being wound on the first pair of compensation pulleys, and said second section
of hauling cable being wound on the second pair of compensation pulleys.
[0013] Thanks to the fact that the distance between the two carrying cables and between
the two branches of each section of hauling cable is greater than the width of the
car, the car will be able to oscillate longitudinally even in the presence of a short
suspension, without any danger of it going to touch the cables. Again thanks to the
fact that the distance between the two carrying cables is greater than the width of
the car, the transversal oscillations of the car are highly damped when approaching
the stations; the speed at which the cars approach the stations does not therefore
have to be reduced too much.
[0014] Moreover, thanks to the use of pairs of compensation pulleys, round which the hauling
cable(s) are wound, an indirect and balanced connection is obtained of the hauling
cable(s) of the car, which allows a uniform movement of the car to be obtained without
any risk that, due to even small differences in the movement of the two branches of
the hauling cable(s) or to their breakage, the large distance between the two abovementioned
branches generates a dangerous twisting moment.
[0015] These and other features and advantages of the present invention will be made more
evident by the following detailed description of two embodiments thereof, described
as non-limiting examples with reference to the enclosed haulings, wherein:
Fig. 1 is a schematic plan view from above of a driving system according to the present
invention for a cableway installation with one pathway, in a first operative condition;
Fig. 2 shows the driving system of Fig. 1, in a second operative condition;
Fig. 3 is a plan view from above of a car of the cableway installation of Fig. 1;
Fig. 4 is a front view of the car of Fig. 3;
Fig. 5 is a cross-sectional view taken along the line V-V of Fig. 3;
Fig. 6 is a diagrammatic plan view from above of a driving system according to the
present invention for a cableway installation with two pathways, in a first operative
condition;
Fig. 7 shows the driving system of Fig. 6, in a second operative condition;
Fig. 8 is a cross-sectional view taken along the line VIII-VIII of Fig. 6;
Fig. 9 is a cross-sectional view taken along the line IX-IX of Fig. 6.
[0016] There is shown in a diagrammatic manner in Figs. 1 and 2 a driving system according
to the present invention for a cableway installation with one pathway, comprising
a pair of parallel carrying cables 1 (represented with a continuous line), extending
between two stations 2 and 3. In the example shown, station 2 is a driving station,
located indifferently up the mountain or down in the valley; station 3 is a driven
station.
[0017] The two carrying cables 1 are located at opposite sides of a car 4, at a reciprocal
distance greater than the width of the car 4. The car 4 is provided in a known manner
with a supporting carriage 5 (better visible in Fig. 3) slidably moving on the two
carrying cables 1 through idle pulleys 50.
[0018] In the present case of a cableway installation with only one pathway, there is only
one hauling cable 6, closed in upon itself to form a ring. The hauling cable 6 comprises
a first pair of parallel branches 6a, 6b (represented with a dashed and dotted line)
that extend from the station 2 to the car 4 and define a first section of hauling
cable 6A, and a second pair of parallel branches 6c, 6d (represented by a line with
dashes and two dots) that extend from the station 3 to the car 4 and define a second
section of hauling cable 6B. The reciprocal distance between the two branches 6a,
6b, as well as the reciprocal distance between the two branches 6c, 6d, is greater
than the width of the car 4. Thus, neither the carrying cables 1, nor the branches
6a-6d of the hauling cable 6 lie along the pathway of longitudinal oscillation of
the car 4. The hauling cable 6 also comprises two further parallel branches 6e, 6f,
that connect together the abovementioned branches 6a, 6b and 6c, 6d, respectively.
[0019] On the carriage 5 of the car 4 there are two pairs of pulleys, for example twin pulleys
11 and 12 located in the proximity of the two sides of the carriage 5 and each comprising
two coaxial pulleys 11a, 11b and 12a, 12b, superimposed one above the other, and rotatable
independently one from the other (Figs. 4 and 5). At the point where the branch 6a
is joined with the branch 6b, the first section of hauling cable 6A is wound on the
first pair of pulleys 11a and 12a; in a similar manner, at the point where the branch
6c is joined with the branch 6d, the second section of hauling cable 6B is wound on
the second pair of pulleys 11b and 12b.
[0020] As shown in Figs. 1 and 2, at the station 2 there is a pair of driving pulleys 7
and 8 that are normally driven in an integral manner by the same driving shaft not
shown, on which the branches 6a and 6b, respectively, of the hauling cable 6 are wound.
In a similar manner, there is a pair of driven pulleys 9 and 10 at the station 3,
on which the branches 6c and 6d, respectively, of the hauling cable 6 are wound.
[0021] The branches 6e and 6f of the hauling cable 6 extend from the exit of the driving
pulleys 7 and 8 of the station 2 to the entry to the driven pulleys 9 and 10 of the
station 3, in a direction parallel to the carrying cables 1, to connect the branch
6a of the section of hauling cable 6A to the branch 6c of the section of hauling cable
6B and the branch 6b of the section of hauling cable 6A to the branch 6d of the section
of hauling cable 6B.
[0022] The two driven pulleys 9 and 10 can be displaced integrally along a direction parallel
to the direction of the carrying cables 1, to ensure an adequate degree of tension
of the hauling cable 6: the two pulleys 9 and 10 thus perform the twin function of
transmission and tensioning. As an alternative, the two pulleys 9, 10 can be fixed,
and the two driving pulleys 7 and 8 can be displaced integrally along said direction
parallel to the direction of the carrying cables 1: the pulleys 9, 10 then perform
only the function of transmission, while the tensioning function is performed by the
driving pulleys 7, 8. It is also possible that both the two driven pulleys 9, 10,
and the two driving pulleys 7, 8 can be displaced along the direction of the carrying
cables.
[0023] Moreover, the two driving pulleys 7 and 8, that as has been said are normally integral,
can be disconnected so that they can rotate independently one from the other, so that
the hauling cable 6 can be made to slide along; this is made possible by the fact
that, as has been said, the pulleys 11a and 12a on the carriage 5 of the car 4 can
rotate in a manner independent from pulleys 11b and 12b, respectively. In this way,
it is possible to vary the points of winding of the hauling cable 6 on the pulleys
11 and 12, at which points of winding the stress on the hauling cable 6 is at its
maximum; it is thus possible to ensure a uniform wear of the hauling cable.
[0024] When the driving system is in operation, the simultaneous rotation of the pulley
7 in a clockwise direction and of the pulley 8 in an anti-clockwise direction determines
the sliding action of the hauling cable 6 in the direction indicated by the arrows
of Fig. 1; the car 4 slides along the carrying cables 1 in the direction of the station
2 (arrow A in Fig. 1). If the angular speed of rotation of the two pulleys 7 and 8
is exactly the same, and such pulleys have exactly the same radius, the sliding speed
of the two branches 6a and 6b, as well as that of the two branches 6c and 6d, is the
same; the twin pulleys 11 and 12 located on the car do not rotate on their own axis
of rotation, as there is no relative sliding action of the pairs of parallel branches
6a, 6b and 6c, 6d of the hauling cable 6. If, on the other hand, the pulleys 7 and
8 do not rotate at exactly the same speed, or if they have a slightly different radius
(for example, due to a different degree of wear of the races of the pulleys themselves),
the sliding speed of the two branches 6a and 6b will not be the same: there will then
be a rotation of the pulleys 11a and 12a on the respective axis of rotation in a clockwise
or anticlockwise direction according to whether the branch 6a has a smaller or larger
sliding speed with respect to that of the branch 6b; in a similar manner, the pulleys
11b and 12b will rotate in an anticlockwise or in a clockwise direction, respectively.
The twin pulleys 11 and 12, making it possible for the pairs of parallel branches
6a, 6b and 6c, 6d of the hauling cable 6 to slide relatively to one another, allow
a compensation to be made for the different sliding speed of the branches 6a and 6b
of the hauling cable 6; for this reason the pulleys 11a, 11b, 12a, 12b are known as
"compensation pulleys". It should be noted that in this way no twisting moment is
applied to the car, as would instead be the case if the branches of the carrying cable
were connected in a substantially fixed manner to the car. This is also true in the
event of a breakage of the hauling cable: in this case, the hauling cable merely slips
away from the carriage of the car, without any dangerous twisting moment being applied
to the latter that could cause disastrous slippages of the carriage off the carrying
cables.
[0025] In a similar manner, when the pulley 7 rotates in an anti-clockwise direction and,
at the same time, the pulley 8 rotates in a clockwise direction, the hauling cable
6 slides in the direction indicated by the arrows in Fig. 2; the car 4 then slides
along the carrying cables 1 in the direction of the station 3 (arrow B of Fig. 2).
As in the previous case, the twin pulleys 11 and 12 allow a compensation to be made
for any difference in the sliding speed of the parallel branches 6b and 6c of the
hauling cable.
[0026] In Figs. 6 and 7 there is shown, in a diagrammatic manner, a driving system according
to the invention for a cableway installation with two pathways. The installation comprises
two pairs of carrying cables 1 and 1', one pair for each pathway, extending between
two stations 2 and 3. The carrying cables of each pair 1 or 1' are parallel to each
other, and are located at a reciprocal distance greater than the width of a respective
car 4 or 4'. The cars 4 and 4' have a respective supporting carriage 5 (Fig. 3) slidably
moving on the pair of carrying cables 1 or 1' through the idle pulleys 50.
[0027] As opposed to the previous case of an installation with only one pathway, there are
two hauling cables 60 (represented by a dashed and dotted line) and 60' (represented
by a line with dashes and two dots), both closed in upon themselves to form two rings.
The first hauling cable 60 comprises a first pair of parallel branches 60a and 60b
that extend from the station 2 to the car 4 and define a first section of hauling
cable 60A for a first pathway, and a second pair of parallel branches 60c and 60d
that extend from the station 2 to the car 4' and define a first section of hauling
cable 60B for a second pathway. The second hauling cable 60' comprises in turn a first
pair of parallel braches 60a' and 60b' that extend from the station 3 to the car 4
and define a second section of hauling cable 60A' for the first pathway, and a second
pair of parallel branches 60c' and 60d' that extend from the station 3 to the car
4' and define a second section of hauling cable 60B' for the second pathway. The reciprocal
distance between the parallel branches 60a, 60b; 60c, 60d; 60a', 60b'; 60c', 60d'
is greater than the width of the cars 4 and 4'; thus, neither the carrying cables,
nor the hauling cables lie within the paths of longitudinal oscillation of the cars.
[0028] On the carriage 5 of each of the cars 4 and 4' there are two pairs of pulleys, for
example two twin pulleys 11 and 12 located in the proximity of the sides of the carriage;
as in the previous case, each twin pulley comprises two pulleys, 11a, 11b and 12a,
12b, respectively, coaxial and rotatable independently one from the other (Figs. 4
and 5).
[0029] At the point where the branches 60a and 60b are joined, the hauling cable 60 is wound
on the first pair of pulleys 11a and 12a of the car 4, and in a similar manner, at
the point where the branches 60c and 60d are joined, the cable 60 is wound on the
first pair of pulleys 11a and 12a of the car 4'. The hauling cable 60' is in turn
wound, at the point where the branches 60a' and 60b' are joined, on the second pair
of pulleys 11b and 12b of the car 4, and, at the point where the branches 60c' and
60d' are joined, on the second pair of pulleys 11b and 12b of the car 4'.
[0030] As is visible in Figs. 6 and 7, at the station 2 there is a twin driving pulley 13,
two twin driven pulleys 14 and 15, and two single driven pulleys 16 and 17.
[0031] As shown in Fig. 8, the twin driving pulley 13 comprises two coaxial pulleys 13a
and 13b made integral by a pair of tie rods 18. The pulley 13 is coupled, by means
of a toothed joint 19, to a driving shaft 20; the rotary motion of the driving shaft
20 is thus transmitted to the pulley 13a, and this in turn transmits it to the pulley
13b. There are also two braking units 21, for the pulleys 13a and 13b, respectively.
The single twin driving pulley 13 could be replaced by a pair of separate driving
pulleys.
[0032] The twin driven pulleys 14 and 15 each comprise, in a manner altogether similar to
the pulleys 11 and 12 on the cars 4 and 4', two superimposed coaxial pulleys freely
rotatable one with the other.
[0033] At the station 2, the branch 60a of the hauling cable 60 is wound on the driven pulley
16 and on the lower pulley of the twin driven pulley 14, and the branch 60d is wound
on the driven pulley 17 and on the lower pulley of the twin driven pulley 15; at the
point where the branches 60a and 60d are joined, the hauling cable 60 is wound on
the pulley 13a of the twin driving pulley 13. Again at the station 2, the branch 60b
of the hauling cable 60 is wound on the upper pulley of the twin driven pulley 14,
and the branch 60c is wound on the upper pulley of the twin driven pulley 15; at the
point where the two branches 60b and 60c are joined, the hauling cable 60 is wound
on the pulley 13b of the twin driving pulley 13.
[0034] At the station 3 there are two single driven pulleys 22 and 23, and three twin driven
pulleys 24, 25 and 26.
[0035] As shown in Fig. 9, the twin driven pulley 26 comprises two coaxial superimposed
pulleys 26a and 26b rotatable independently one from the other on a shaft 27. The
twin driven pulley 26 can also be displaced along a direction parallel to the direction
of the carrying cables to ensure a constant degree of tension of the hauling cables
60 and 60'; the twin driven pulley 26 is thus a tensioning pulley. As an alternative,
the twin driven pulley 26 can be fixed, and the twin driving pulley 13 can be displaced
in the direction of the carrying cables, or both the twin driven pulley 26 and the
twin driving pulley 13 can be displaced in the direction of the carrying cables.
[0036] At the station 3, the branch 60a' of the hauling cable 60' is wound on the driven
pulley 23 and on the lower pulley of the twin driven pulley 24, and the branch 60d
is wound on the driven pulley 22 and on the lower pulley of the twin driven pulley
25; at the point where the two branches 60a' and 60d' are joined, the hauling cable
60' is wound on the pulley 26a of the twin tensioning pulley 26. Again at the station
3, the branch 60b' of the hauling cable 60' is wound on the upper pulley of the twin
driven pulley 24, and the branch 60c' is wound on the upper pulley of the twin driven
pulley 25; at the point where the branches 60b' and 60c' are joined, the hauling cable
60' is wound on the pulley 26b of the twin tensioning pulley 13.
[0037] When the driving system is in operation, the rotation in the anti-clockwise direction
of the twin driving pulley 13 determines the sliding action of the two hauling cables
60 and 60' in the direction indicated by the arrows in Fig. 6; the car 4 slides along
the pair of carrying cables 1 towards the station 3, while the car 4' slides along
the carrying cables 1' toward the station 2. The rotation in a clockwise direction
of the twin driving pulley 13 determines on the other hand the sliding action of the
hauling cables 60 and 60' in the direction indicated in Fig. 7; the car 4 then slides
along the pair of carrying cables 1 towards the station 2, while the car 4' slides
along the carrying cables 1' toward the station 3.
[0038] In both cases, if the sliding speeds of the branches 60a and 60b (and thus of the
branches 60c and 60d) of the hauling cable 60 are exactly the same one with the other,
and the sliding speeds of the branches 60a' and 60b' (and thus of the branches 60c'
and 60d') of the hauling cable 60' are also exactly the same one with the other, the
twin pulleys 11 and 12 on the cars 4 and 4' do not rotate on their respective axis
of rotation.
[0039] If, on the other hand, the two branches 60a and 60b (and thus the two branches 60c
and 60d) of the hauling cable 60 do not slide along at the same speed, for example
due to the fact that the two pulleys 13a and 13b of the twin driving pulley do not
have exactly the same radius, the pulleys 11a and 12a of the first pair of pulleys
on the cars 4 and 4' rotate on their respective axis of rotation, allowing a relative
sliding action of the branches of the hauling cable 60 in order to compensate that
difference in the sliding speeds; in this way the application of a twisting moment
to the cars 4 and 4' is avoided. Something similar takes place if the two branches
60a' and 60'b (and thus the two branches 60c' and 60d') of the hauling cable 60 do
not slide along at the same speed: such difference in the sliding speeds is compensated
by the rotation of the pulleys 11b and 12b of the second pair of pulleys on the cars
4 and 4'.
[0040] Even in the case of breakage of one of the hauling cables, the latter simply slips
away from the respective pair of pulleys on the cars, but it does not impart any dangerous
twisting moment to the cars.
[0041] As has been said, the two pulleys 13a and 13b of the twin driving pulley 13 are normally
made integral by the two tie rods 18, and rotate simultaneously. If the tie rods 18
are removed it is possible to disconnect the two pulleys 13a and 13b, making the pulley
13b independently rotatable with respect to the pulley 13a; it is thus possible to
have the hauling cable 60 slip along so as to ensure its uniform wear. The slippage
of the hauling cable 60' is, on the other hand, always possible, since the two pulleys
26a and 26b of the twin pulley 26 are normally independently rotatable from one another.
[0042] The driving system according to the present invention is suitable for installations
wherein a braking system of the cars on the carrying cables is provided for or otherwise.
1. Driving system for cableway installations of the twin-cable type, comprising:
- at least one pathway along which a respective car (4; 4, 4') moves; and
- for said at least one pathway, a pair of parallel carrying cables (1; 1, 1'), on
which a carriage (5) for supporting the car (4; 4, 4') moves slidably, and at least
one hauling cable, (6; 60, 60'), characterized in that
- said carrying cables (1; 1, 1') are located at opposite sides of the car (4; 4,
4'), at a reciprocal distance greater than the width of the car (4; 4, 4');
- on the carriage (5) of the car (4; 4, 4') there are two twin compensation pulleys
(11,12) each twin pulley being constituted by two superposed (11a,11b; 12a,12b) rotatably
independent pulleys, said twin pulleys (11,12) being located symmetrically in the
proximity of the two sides of the carriage (5);
- for said at least one pathway there is a first section of hauling cable (6A; 60A,
60B) and a second section of hauling cable (6B; 60A', 60B'), the first section of
hauling cable (6A; 60A, 60B) comprising two parallel branches (6a, 6b; 60a, 60b, 60c,
60d) extending from a first station (2) to the car (4; 4, 4') and located at a reciprocal
distance greater than the width of the car (4; 4, 4'), and the second section of hauling
cable (6B; 60A', 60B') comprising two parallel branches (6c, 6d; 60a', 60b', 60c',
60d') extending from a second station (3) to the car (4; 4, 4') and located at a reciprocal
distance greater than the width of the car (4; 4, 4'), said first section of hauling
cable (6A; 60A, 60B) being wound on the lower pulleys (11a,12a) of the twin compensation
pulleys, and said second section of hauling cable (6B; 60A', 60B') being wound on
the upper pulleys (11b,12b) of the twin compensation pulleys (11b, 12b).
2. Driving system according to claim 1, characterized in that the first pulleys (11a,
11b) of each pair of compensation pulleys (11a, 12a, 11b, 12b) are coaxial and superimposed
one above the other to form a twin pulley (11), and the second pulleys (12a, 12b)
of each pair of compensation pulleys (11a, 12a, 11b, 12b) are also coaxial and superimposed
one above the other to form a further twin pulley (12).
3. Driving system according to claim 1 or 2 and comprising one pathway only, characterized
in that:
- said first section of hauling cable (6A) and said second section of hauling cable
(6B) are connected to form a single ring-shaped hauling cable (6);
- said two branches (6a, 6b) of the first section of hauling cable (6A) are wound
on two respective driving pulleys (7, 8), respectively, located in said first station
(2) and normally connected so as to be able to rotate integrally;
- said two branches (6c, 6d) of the second section of hauling cable (6B) are wound
on two respective driven pulleys (9, 10), respectively, located in said second station
(3).
4. Driving system according to claim 3, characterized in that said two driven pulleys
(9, 10) can be integrally displaced in the direction of the carrying cables (1) to
allow the hauling cable (6) to be put under tension.
5. Driving system according to claim 4, characterized in that said two driving pulleys
(7, 8) as well can be integrally displaced in the direction of the carrying cables
(1) to allow, in combination with the two driven pulleys (9, 10), the hauling cable
to be put under tension.
6. Driving system according to claim 3, characterized in that said two driving pulleys
(7, 8) can be integrally displaced in the direction of the carrying cables (1) to
allow the hauling cable (6) to be put under tension.
7. Driving system according to any of the claims from 3 to 6, characterized in that said
two driving pulleys (7, 8) normally connected to rotate integrally can be disconnected
so as to rotate independently one from the other, to allow the sliding action of the
hauling cable (6).
8. Driving system according to claims 1 or 2 and comprising:
- two pathways;
- for each pathway, a respective pair of substantially parallel carrying cables (1,
1') on which the carriage of a respective car (4, 4') moves slidably, characterized
in that:
- the carrying cables (1, 1') of each pathway are placed at opposite sides of the
respective car (4, 4') at a reciprocal distance greater than the width of said respective
car (4, 4');
- the first section of hauling cable (60A) of one pathway, extending from the first
station (2) to the respective car (4), is connected to the first section of hauling
cable (60B) of the other pathway, extending from the first station (2) to the respective
car (4'), to form a first ring-shaped hauling cable (60A), and the second section
of hauling cable (60A') of one pathway, extending from the second station (3) to the
respective car (4), is connected to the second section of hauling cable (60B') of
the other pathway, extending from the second station (3) to the respective car (4'),
to form a second ring-shaped hauling cable (60');
- the first hauling cable (60) is wound on at least one driving pulley (13) located
in said first station (2), and the second hauling cable is wound on driven pulleys
(22-26) located in said second station (3).
9. Driving system according to claim 8, characterized in that said at least one driving
pulley (13) is a twin-pulley comprising two superimposed coaxial driving pulleys (13a,
13b) normally connected to rotate integrally.
10. Driving system according to claim 9, characterized in that a first driving pulley
(13a) of the twin driving pulley (13) is coupled with a driving shaft (20), and a
second driving pulley (13b) of the twin driving pulley (13) is made integral with
the first driving pulley (13a) by means of tie rods (18).
11. Driving system according to claim 9 or 10, characterized in that the two driving pulleys
(13a, 13b) of the twin driving pulley (13) can be disconnected to allow the sliding
action of the first hauling cable (60).
12. Driving system according to any of the claims from 8 to 11, characterized in that
said twin driving pulley (13) can be displaced in the direction of the carrying cables
(1, 1') to allow the two hauling cables (60, 60') to be put under tension.
13. Driving system according to any of the claims from 8 to 12, characterized in that
said driven pulleys (22-26) located in the second station (3) comprise at least one
twin driven pulley (26) comprising two coaxial superimposed pulleys (26a, 26b) rotatable
independently one from the other, said twin driven pulley (26) being displaceable
in the direction of the carrying cables (1, 1') to allow the two hauling cables (60,
60') to be put under tension.
14. Driving system according to claim 13, characterized in that said driven pulleys located
in the second station (3) comprise three twin driven pulleys (24-26), each comprising
two coaxial superimposed pulleys rotatable independently one from the other, and two
single driven pulleys (22, 23).
15. Driving system according to any of the claims from 8 to 14, characterized in that
it comprises further driven pulleys (14-17) located in said first station (2).
16. Driving system according to claim 15, characterized in that said further driven pulleys
(14-17) comprise two twin pulleys (14, 15), each comprising two coaxial superimposed
pulleys rotatable independently one from the other, and two single driven pulleys
(16, 17).
1. Antriebsvorrichtung für Zweiseil-Seilschwebebahnen, welche folgendes aufweist:
- wenigstens eine Bahnstrecke, entlang der sich eine zugeordnete Kabine (4; 4, 4')
bewegt, und
- für die wenigstens eine Bahnstrecke ein Paar von parallelen Tragseilen (1; 1, 1')
vorgesehen ist, an denen sich ein Laufgestell (5) zum Tragen der Kabine (4; 4, 4')
gleitend bewegt, und wenigstens ein Zugseil (6; 60, 60'), vorgesehen ist,
dadurch gekennzeichnet, daß
- die Tragseile (1; 1, 1') auf gegenüberliegenden Seiten der Kabine (4; 4, 4') mit
einem gegenseitigen Abstand angeordnet sind, welcher größer als die Breite der Kabine
(4; 4, 4') ist;
- auf dem Laufgestell (5) der Kabine (4; 4, 4') zwei Zwillingskompensationsseilscheiben
(11, 12) vorgesehen sind, wobei jede Zwillingsseilscheibe von zwei übereinander angeordneten,
unabhängig drehbeweglichen Seilscheiben (11a, 11b; 12a, 12b) gebildet wird, und wobei
die Zwillingsseilscheiben (11, 12) symmetrisch in der Nähe der beiden Seiten des Laufgestells
(5) angeordnet sind;
- für die wenigstens eine Bahnstrecke ein erster Abschnitt des Zugseils (6A; 60A,
60B) und ein zweiter Abschnitt des Zugseils (6B; 60A', 60B') vorgesehen sind, der
erste Abschnitt des Zugseils (6A; 60A, 60B) zwei parallele Zweige (6a, 6b; 60a, 60b,
60c, 60d) aufweist, welche von einer ersten Station (2) zu der Kabine (4; 4, 4') verlaufen
und in einem gegenseitigen Abstand angeordnet sind, welcher größer als die Breite
der Kabine (4; 4, 4') ist, und der zweite Abschnitt des Zugseils (6B; 60A', 60B')
zwei parallele Zweige (6c, 6d; 60a,' 60b', 60c', 60d') aufweist, die von einer zweiten
Station (3) zu der Kabine (4; 4, 4') verlaufen, und in einem gegenseitigen Abstand
angeordnet sind, welcher größer als die Breite der Kabine (4; 4, 4') ist, wobei der
erste Abschnitt des Zugseils (6A; 60A, 60B) um die unteren Seilscheiben (11a, 12a)
der Zwillingskompensationsseilscheiben läuft, und der zweite Abschnitt des Zugseils
(6B, 60A', 60B') auf den oberen Seilscheiben (11b, 12b) der Zwillingskompensationsseilscheiben
läuft.
2. Antriebsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die ersten Seilscheiben (11a, 11b) jedes Paars von Kompensationsseilscheiben
(11a, 12a, 12a, 12b) koaxial und übereinanderliegend angeordnet sind, um eine Zwillingsseilscheibe
(11) zu bilden, und daß die Seilscheiben (12a, 12b) des jeweiligen Paars von Kompensationsseilscheiben
(11a, 12a, 11b, 12b) ebenfalls koaxial und übereinanderliegend zur Bildung einer weiteren
Zwillingsseilscheibe (12) angeordnet sind.
3. Antriebsvorrichtung nach Anspruch 1 oder 2, welche nur eine Bahnstrecke aufweist
, gekennzeichnet durch folgendes:
- der erste Abschnitt des Zugseils (6A) und der zweite Abschnitt des Zugseils (6B)
sind zur Bildung eines einzigen ringförmigen Zugseils (6) verbunden;
- die beiden Zweige (6a, 6b) des ersten Abschnitts des Zugseils (6A) laufen auf den
beiden zugeordneten Antriebsseilscheiben (7,8) jeweils, die an der ersten Station
(2) angeordnet sind, und die normalerweise so verbunden sind, daß sie sich integral
drehen können;
- die beiden Zweige (6c, 6d) des zweiten Abschnitts des Zugseils (6B) auf den beiden
zugeordneten getriebenen Seilscheiben (9, 10) jeweils laufen, die an der zweiten Station
(3) angeordnet sind.
4. Antriebsvorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die beiden getriebenen Seilscheiben (9, 10) integral in Richtung der Zugseile
(1) verschiebbar sind, um zu ermöglichen, daß das Zugseil (6) unter Spannung gebracht
wird.
5. Antriebsvorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die beiden getriebenen Seilscheiben (7, 8) ebenfalls integral in Richtung der
Tragseile (1) bewegbar sind, um in Kombination mit den beiden getriebenen Seilscheiben
(9, 10) zu ermöglichen, daß das Zugseil unter Spannung gebracht wird.
6. Antriebsvorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die beiden Antriebsseilscheiben (7, 8) integral in Richtung der Tragseile (1)
verschiebbar sind, um zu ermöglichen, daß das Zugseil (6) unter Spannung gebracht
werden kann.
7. Antriebsvorrichtung nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß die beiden Antriebsseilscheiben (7, 8) im Grundzustand derart verbunden sind,
daß sie sich integral drehen können, aber derart abkoppelbar sind, daß sie sich unabhängig
voneinander drehen können, um eine Gleitwirkung des Zugseils (6) zu ermöglichen.
8. Antriebsvorrichtung nach Anspruch 1 oder 2, welche folgendes aufweist:
- zwei Bahnstrecken,
- für jede Bahnstrecke ein zugeordnetes Paar von im wesentlichen parallelen Tragseilen
(1, 1'), an denen das Laufgestell einer zugeordneten Kabine (4, 4') gleitbeweglich
bewegbar ist,
dadurch gekennzeichnet, daß:
- die Tragseile (1, 1') jeder Bahnstrecke auf gegenüberliegenden Seiten der zugeordneten
Kabine (4, 4') in einem gegenseitigen Abstand angeordnet sind, welcher größer als
die Breite der zugeordneten Kabine (4, 4') ist;
- der erste Abschnitt des Zugseils (60A) einer Bahnstrecke, welcher sich von der ersten
Station (2) zu der zugeordneten Kabine (4) erstreckt, mit dem ersten Abschnitt des
Zugseils (60B) der anderen Bahnstrecke verbunden ist, welcher sich von der ersten
Station (2) zu der zugeordneten Kabine (4') erstreckt, um ein erstes, ringförmiges
Zugseil (60A) zu bilden, und der zweite Abschnitt des Zugseils (60A') einer Bahnstrecke,
die von der zweiten Station (3) zu der zugeordneten Kabine (4) verläuft, mit dem zweiten
Abschnitt des Zugseils (60B') der anderen Bahnstrecke verbunden ist, welcher sich
von der zweiten Station (3) zu der zugeordneten Kabine (4) erstreckt, um ein zweites,
ringförmiges Zugseil (60') zu bilden;
- das erste Zugseil (60) wenigstens auf einer Antriebsriemenscheibe (13) läuft, die
in der ersten Station (2) angeordnet ist, und das zweite Zugseil wenigstens auf getriebenen
Seilscheiben (22, 26) läuft, die an der zweiten Station (3) angeordnet sind.
9. Antriebsvorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß wenigstens eine Antriebsseilscheibe (13) eine Zwillingsseilscheibe ist, welche
zwei übereinanderliegend angeordnete, koaxiale Antriebsseilscheiben (13a, 13b) aufweist,
die im Grundzustand zur Ausführung einer integralen Drehbewegung miteinander verbunden
sind.
10. Antriebsvorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß eine erste Antriebsseilscheibe (13a) der Zwillingsantriebsseilscheibe (13) mit
einer Antriebswelle (20) verbunden ist, und daß eine zweite Antriebsseilscheibe (13b)
der Zwillingsantriebsseilscheibe (13) integral mit der ersten Antriebsseilscheibe
(13) mittels Zugstangen (18) verbunden ist.
11. Antriebsvorrichtung nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß zwei Antriebsseilscheiben (13a, 13b) der Zwillingsantriebsseilscheibe (13)
voneinander abkoppelbar sind, um eine Gleitwirkung auf das erste Zugseil (60) auszuüben.
12. Antriebsvorrichtung nach einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, daß die Zwillingsantriebsseilscheibe (13) in Richtung der Zugseile (1, 1') verschiebbar
ist, um zu ermöglichen, daß die beiden Zugseile (60, 60') unter Spannung gebracht
werden können.
13. Antriebsvorrichtung nach einem der Ansprüche 8 bis 12, dadurch gekennzeichnet, daß die Antriebsseilscheiben (22 - 26), welche in der zweiten Station (3) angeordnet
sind, wenigstens eine getriebene Zwillingsseilscheibe (26) aufweisen, welche zwei
koaxial übereinander angeordnete Seilscheiben (26a, 26b) aufweist, welche unabhängig
voneinander drehbeweglich sind, und daß die getriebene Zwillingsseilscheibe (26) in
Richtung der Zugseile (1, 1') verschiebbar ist, um zu ermöglichen, daß die beiden
Zugseile (60, 60') unter Spannung gebracht werden können.
14. Antriebsvorrichtung nach Anspruch 13, dadurch gekennzeichnet, daß die getriebenen Seilscheiben, die in der zweiten Station (3) angeordnet sind,
drei getriebene Zwillingsseilscheiben (24 - 26) aufweisen, welche jeweils zwei koaxial
übereinander angeordnete Seilscheiben, die unabhängig voneinander drehbeweglich sind,
und zwei einzelne getriebene Seilscheiben (22, 23) aufweisen.
15. Antriebsvorrichtung nach einem der Ansprüche 8 bis 14, dadurch gekennzeichnet, daß sie ferner getriebene Seilscheiben (14 - 17) aufweist, welche an der ersten
Station (2) angeordnet sind.
16. Antriebsvorrichtung nach Anspruch 15, dadurch gekennzeichnet, daß die weiteren getriebenen Seilscheiben (14 - 17) zwei Zwillingsseilscheiben (14,
15) aufweisen, welche jweils zwei koaxial übereinander angeordnete Seilscheiben, die
unabhängig voneinanderdrehbeweglich sind, und zwei einzelne getriebene Seilscheiben
(16, 17) aufweisen.
1. Système d'entraînement pour des téléphériques du type à double câble, comportant :
- au moins un passage le long duquel une cabine respective (4; 4, 4') se déplace;
et
- pour ledit au moins un passage, une paire de câbles porteurs parallèles (1; 1, 1'),
sur lequel un chariot (5) destiné à supporter la cabine (4; 4, 4') se déplace de façon
coulissante, et au moins un câble tracteur (6'; 60, 60'),
caractérisé en ce que
- lesdits câbles porteurs (1; 1, 1') sont disposés sur des côtés opposés de la cabine
(4; 4, 4'), à une distance réciproque plus grande que la largeur de la cabine (4;
4, 4');
- sur le chariot (5) de la cabine (4; 4, 4') se trouve deux poulies double de compensation
(11, 12), chaque poulie double étant constituée par deux poulies superposées pouvant
tourner de manière indépendante (11a, 11b; 12a, 12b), lesdites poulies doubles (11,
12) étant disposées de manière symétrique à proximité des deux côtés du chariot (5);
- pour ledit au moins un passage, il y a une première section de câble tracteur (6A;
60A, 60B) et une deuxième section de câble tracteur (6B; 60A', 60B'), la première
section de câble tracteur (6A; 60A, 60B) comportant deux branches parallèles (6a,
6b; 60a, 60b, 60c, 60d) s'étendant depuis une première station (2) jusqu'à la cabine
(4; 4, 4') et disposées à une distance réciproque plus grande que la largeur de la
cabine (4; 4, 4'), et la deuxième section de câble tracteur (6B; 60A', 60B') comportant
deux branches parallèles (6c, 6d; 60a', 60b', 60c', 60d') s'étendant depuis une deuxième
station (3) jusqu'à la cabine (4; 4, 4') et disposées à une distance réciproque plus
grande que la largeur de la cabine (4; 4, 4'), ladite première section de câble tracteur
(6A; 60A, 60B) étant enroulée sur les poulies inférieures (11a, 12a) des poulies de
compensation double, et ladite deuxième section de câble tracteur (6B; 60A', 60B')
étant enroulée sur les poulies supérieures (11b, 12b) des poulies de compensation
double (11b, 12b).
2. Système d'entraînement selon la revendication 1, caractérisé en ce que les premières
poulies (11a, 12a) de chaque paire de poulies de compensation (11a, 12a, 11b, 12b)
sont coaxiales et superposées l'une au-dessus de l'autre afin de former une poulie
double (11), et les deuxièmes poulies (12a, 12b) de chaque paire de poulies de compensation
(11a, 12a, 11b, 12b) sont également coaxiales et superposées l'une au-dessus de l'autre
afin de former une autre poulie double (12).
3. Système d'entraînement selon la revendication 1 ou 2 et comportant un passage seulement,
caractérisé en ce que :
- ladite première section de câble tracteur (6A) et ladite deuxième section de câble
tracteur (6B) sont reliées afin de former un unique câble tracteur de forme annulaire
(6);
- lesdites deux branches (6a, 6b) de la première section de câble tracteur (6A) sont
enroulées sur deux poulies d'entraînement respectives (7, 8), respectivement, disposées
dans ladite première station (2) et normalement reliées de façon à pouvoir tourner
d'un seul tenant;
- lesdites deux branches (6c, 6d) de la deuxième section de câble tracteur (6B) sont
enroulées sur deux poulies entraînées respectives (9, 10), respectivement, disposées
dans ladite deuxième station (3).
4. Système d'entraînement selon la revendication 3, caractérisé en ce que lesdites deux
poulies entraînées (9, 10) peuvent être déplacées d'un seul tenant dans la direction
des câbles porteurs (1) afin de permettre au câble tracteur (6) d'être placé sous
tension.
5. Système d'entraînement selon la revendication 4, caractérisé en ce que lesdites deux
poulies d'entraînement (7, 8) peuvent également être déplacées d'un seul tenant dans
la direction des câbles porteurs (1) afin de permettre, en combinaison avec les deux
poulies entraînées (9, 10), de placer le câble tracteur sous tension.
6. Système d'entraînement selon la revendication 3, caractérisé en ce que lesdites deux
poulies d'entraînement (7, 8) peuvent être déplacées d'un seul tenant dans la direction
des câbles porteurs (1) afin de permettre au câble tracteur (6) d'être placé sous
tension.
7. Système d'entraînement selon l'une quelconque des revendications 3 à 6, caractérisé
en ce que lesdites deux poulies d'entraînement (7, 8) normalement reliées afin de
tourner d'un seul tenant peuvent être déconnectées de façon à tourner indépendamment
l'une de l'autre, afin de permettre l'action de glissement du câble tracteur (6).
8. Système d'entraînement selon la revendication 1 ou 2 et comportant :
- deux passages;
- pour chaque passage, une paire respective de câbles porteurs sensiblement parallèles
(1, 1') sur laquelle le chariot d'une cabine respective (4, 4') se déplace de façon
coulissante, caractérisé en ce que :
- les câbles porteurs (1, 1') de chaque passage sont placés au niveau de côtés opposés
de la cabine respective (4, 4') à une distance réciproque plus grande que la largeur
de ladite cabine respective (4, 4');
- la première section de câble tracteur (60A) d'un passage, s'étendant depuis la première
station (2) jusqu'à la cabine respective (4), est reliée à la première section de
câble tracteur (60B) de l'autre passage, en s'étendant depuis la première station
(2) jusqu'à la cabine respective (4'), afin de former un premier câble tracteur de
forme annulaire (60A), et la deuxième section de câble tracteur (60A') d'un passage,
s'étendant depuis la deuxième station (3) jusqu'à la cabine respective (4), est reliée
à la deuxième section de câble tracteur (60B') de l'autre passage, en s'étendant depuis
la deuxième station (3) jusqu'à la cabine respective (4'), afin de former un deuxième
câble tracteur de forme annulaire (60');
- le premier câble tracteur (60) est enroulé sur au moins une poulie d'entraînement
(13) disposée dans ladite première station (2), et le deuxième câble tracteur est
enroulé sur des poulies entraînées (22 à 26) disposées dans ladite deuxième station
(3).
9. Système d'entraînement selon la revendication 8, caractérisé en ce qu'au moins une
poulie d'entraînement (13) est une poulie double comportant deux poulies d'entraînement
coaxiales superposées (13a, 13b) normalement reliées afin de tourner d'un seul tenant.
10. Système d'entraînement selon la revendication 1, caractérisé en ce qu'une première
poulie d'entraînement (13a) de la poulie d'entraînement double (13) est reliée à un
arbre d'entraînement (20), et une deuxième poulie d'entraînement (13b) de la poulie
d'entraînement double (13) est d'un seul tenant avec la première poulie d'entraînement
(13a) au moyen de tirants (18).
11. Système d'entraînement selon la revendication 9 ou 10, caractérisé en ce que les deux
poulies d'entraînement (13a, 13b) de la poulie d'entraînement double (13) peuvent
être déconnectées afin de permettre l'action de glissement du premier câble tracteur
(60).
12. Système d'entraînement selon l'une quelconque des revendications 8 à 11, caractérisé
en ce que ladite poulie d'entraînement double (13) peut être déplacée dans la direction
des câbles porteurs (1, 1') afin de permettre aux deux câbles tracteurs (60, 60')
d'être placés sous tension.
13. Système d'entraînement selon l'une des revendications 8 à 12, caractérisé en ce que
lesdites poulies entraînées (22 à 26) disposées dans la deuxième station (3) comportent
au moins une poulie entraînée double (26) comportant deux poulies superposées coaxiales
(26a, 26b) pouvant tourner indépendamment l'une de l'autre, ladite poulie entraînée
double (26) pouvant être déplacée dans la direction des câbles porteurs (1, 1') afin
de permettre aux deux câbles tracteurs (60, 60') d'être mis sous tension.
14. Système d'entraînement selon la revendication 13, caractérisé en ce que lesdites poulies
entraînées disposées dans la deuxième station (3) comportent trois poulies entraînées
(24 à 26), comportant chacune deux poulies superposées coaxiales pouvant tourner indépendamment
l'une de l'autre, et deux poulies entraînées simples (22, 23).
15. Système d'entraînement selon l'une quelconque des revendications 8 à 14, caractérisé
en ce qu'il comporte d'autres poulies entraînées (14 à 17) disposées dans ladite première
station (2).
16. Système d'entraînement selon la revendication 15, caractérisé en ce que lesdites autres
poulies entraînées (14 à 17) comportent deux poulies doubles (14, 15), comportant
chacune deux poulies superposées coaxiales pouvant tourner indépendamment l'une de
l'autre, et deux poulies entraînées simples (16, 17).