[0001] The invention relates to an elevator system, in particular to an elevator system
comprising a plurality of brakes. The invention further relates to testing the brakes
of an elevator system.
[0002] An elevator system typically comprises at least one elevator car moving along a hoistway
extending between a plurality of landings and a driving member which is configured
for driving the elevator car. In order to ensure a safe operation, an elevator system
usually further comprises a plurality of brakes which are configured for braking the
elevator car.
[0003] There are elevator safety procedures which require to regularly check whether the
brakes allow to securely stop and hold the elevator car even if one of the brakes
fails.
[0004] It therefore would be beneficial to provide an elevator system and a method for checking
the brakes of an elevator system allowing to perform the necessary test procedures
easily and conveniently.
[0005] According to an exemplary embodiment of the invention, an elevator system comprises:
An elevator car, which is movably arranged within a hoistway; a drive unit, which
is configured for driving the elevator car; at least two brakes, which are respectively
configured for braking the elevator car; and a control unit, which is configured for
controlling the drive unit and the at least two brakes; an electrical connection device,
which is switchable between a state of normal operation and a state of brake test
operation. The elevator system is configured such that, when the electrical connection
device is switched into the state of brake test operation, at least one of the brakes
is deactivated and a signal indicating the state of brake test operation is supplied
to the control unit. The control unit is configured to operate the elevator system
in a brake test mode, if it detects the signal indicating the state of brake test
operation.
[0006] US 2011/048863 A1 discloses a control arrangement for an elevator brake, comprising a control circuit
adapted to generate, according to a demand for releasing a first braking member of
the elevator brake, a first actuating signal and to generate, according to a demand
for releasing a second braking member of the elevator brake, a second actuating signal;
a first terminal for outputting the first actuating signal to a first electromagnetic
actuating means of the elevator brake, a second terminal for outputting the second
actuating signal to a second electromagnetic actuating means of the elevator brake;
the control arrangement being adapted to allow at least the following modes of operation.
A normal operation mode in which the first and the second actuating signals are supplied
synchronously to the first and second electromagnetic actuation means, respectively,
and a single braking member test operation mode, in which one of the first and second
actuating signals is supplied to the respective one of the first and second electromagnetic
actuating means, and an actuating signal for permanently releasing the respective
of the first and second braking members is supplied to the other one of the first
and second electromagnetic actuating means
[0007] According to an exemplary embodiment of the invention, a method of testing an elevator
system according to an exemplary embodiment of the invention comprises the steps of
switching the connection device from the state of normal operation to the state of
brake test operation and operating the elevator system in the brake test mode.
[0008] Thus, in the brake test mode, the elevator system may be controlled by the same elevator
control unit as in the mode of normal operation, i.e. the mode in which the elevator
system is operated for conveying passengers. However, when the elevator control unit
detects the signal indicating the state of brake test operation, operation of the
elevator system in the mode of normal operation is prevented, so that no passengers
may use the elevator system when it is operated in the brake test mode.
[0009] According to another exemplary embodiment of the invention, an elevator system comprises:
An elevator car, which is movably arranged within a hoistway; a drive unit, which
is configured for driving the elevator car; at least two brakes, which are respectively
configured for braking the elevator car; and a control unit, which is configured for
controlling the drive unit and the at least two brakes; a power supply line including
at least two safety relays, which are serially connected to each other; and an electrical
connection device, which is switchable between a state of normal operation and a state
of brake test operation. The elevator system is configured such that when the electrical
connection device is switched into the state of brake test operation, at least one
of the brakes is deactivated so that only the brakes, which are not deactivated, are
engaged when one of the safety relays is opened, but all brakes including the at least
one deactivated brake are engaged when the other one of the safety relays is opened.
[0010] According to an exemplary embodiment of the invention, a method of testing an elevator
system according to an exemplary embodiment of the invention comprises the steps of
switching the electrical connection device from the state of normal operation to the
state of brake test operation; and engaging the brakes, which are not deactivated,
by opening one of the safety relays.
[0011] Exemplary embodiments of the invention allow to perform test procedures for checking
the brakes of an elevator system, in particular to check whether the brakes allow
to securely stop and/or hold the elevator car even in case one of the brakes fails,
easily and conveniently. Exemplary embodiments in particular avoid the need for mechanically
blocking at least one of the brakes.
[0012] Exemplary embodiments of the invention will be described in more detail with respect
to the enclosed figures:
Figure 1 schematically depicts an elevator system according to an exemplary embodiment
of the invention.
Figure 2 depicts a schematic circuit diagram of an electrical circuit according to
an exemplary embodiment of the invention in a state of normal operation.
Figure 3 depicts a schematic circuit diagram of an electrical circuit according to
an exemplary embodiment of the invention in a state of brake test operation.
Figure 4a schematically illustrates the operation of the brake sensors in the state
of normal operation.
Figure 4b schematically illustrates the operation of the brake sensors in the state
of brake test operation.
Figures 5 and 6 schematically illustrate the switching between the state of normal
operation and the state of brake test operation by means of plug-and-socket-combination.
[0013] Figure 1 schematically depicts an elevator system 2 according to an exemplary embodiment
of the invention.
[0014] The elevator system 2 includes an elevator car 6 which is movably arranged within
a hoistway 4 extending between a plurality of landings 8. The elevator car 6 in particular
may move along a plurality of guiderails 14, extending along the vertical direction
of the hoistway 4. Only one of said guiderails 14 is visible in Figure 1. Although
only one elevator car 6 is depicted in Figure 1, the skilled person will understand
that exemplary embodiments of the invention may comprise elevator systems 2 having
a plurality of elevator cars 6 moving in one or more hoistways 4.
[0015] The elevator car 6 is movably suspended by means of a tension member 3. The tension
member 3, for example a rope or belt, is connected to a drive unit 5, which is configured
for driving the tension member 3 in order to move the elevator car 6 along the height
of the hoistway 4 between the plurality of landings 8, which are located on different
floors.
[0016] The drive unit 5 in particular comprises a motor 70 and a sheave 72, which is mounted
to an axle 80 driven by the motor 70. The tension member 3 runs over the outer periphery
of the sheave 72 so that the elevator car 6 may be moved by rotating the sheave 72.
[0017] Each landing 8 is provided with a landing door 11, and the elevator car 6 is provided
with a corresponding elevator car door 12 for allowing passengers to transfer between
a landing 8 and the interior of the elevator car 6 when the elevator car 6 is positioned
at the respective landing 8.
[0018] The exemplary embodiment shown in Figure 1 uses a 1:1 roping for suspending the elevator
car 6. The skilled person, however, easily understands that the type of the roping
is not essential for the invention and that different kinds of roping, e.g. a 2:1
roping or a 4:1 roping may be used as well. The elevator system 2 may use a counterweight
(not shown) or not. The elevator system 2 may have a machine room or may be a machine
room-less elevator system. The tension member 3 may be a rope, e.g. a steel core,
or a belt. The tension member 3 may be uncoated or may have a coating, e.g. in the
form of a polymer jacket. In a particular embodiment, the tension member 3 may be
a belt comprising a plurality polymer coated steel cords (not shown).
[0019] The drive unit 5 is controlled by an elevator control unit 30 for moving the elevator
car 6 along the hoistway 4 between the different landings 8.
[0020] Input to the control unit 30 may be provided via landing control panels 7a, which
are provided on each landing 8 close to the landing doors 11, and/or via an elevator
car control panel 7b, which is provided inside the elevator car 6.
[0021] The landing control panels 7a and the elevator car control panel 7b may be connected
to the elevator control unit 30 by means of electrical lines, which are not shown
in Fig. 1, in particular by an electric bus, or by means of wireless data connections.
[0022] The drive unit 5 is provided with a plurality of brakes 32, 36, 40, in particular
three brakes 32, 36, 40. In the embodiment shown in Figure 1 the brakes 32, 36, 40
are configured to selectively engage with brake disks 74, 76, 78, which are mounted
to the axle 80 of the motor 70 for braking, i.e. for stopping and/or holding, the
elevator car 6. In alternative embodiments, which are not depicted in the figures,
the brakes 32, 36, 40 may be configured to engage directly with the tension member
3, the sheave 72 and/or with the axle 80 of the motor 70, respectively. The brakes
32, 36, 40 in particular may be configured as holding brakes, which are engaged every
time the elevator car 6 has been stopped at one of the landings 8.
[0023] Details of controlling and testing the brakes 32, 36, 40 are described in the following
with respect to Figures 2 to 6.
[0024] Figure 2 depicts a schematic circuit diagram of an electrical circuit 20 which is
configured for controlling and testing the brakes 32, 36, 40. Figure 2 in particular
illustrates a state of normal operation.
[0025] The electrical circuit 20 comprises an electrical power supply 22 supplying a DC
voltage of e.g. 230 V.
[0026] An electrical power supply line 25 electrically connects the (three) brakes 32, 36,
40 of the elevator system 2 with the electrical power supply 22. A first safety relay
24 and a second safety relay 26 are serially arranged within the electrical power
supply line 25. As a result, the electrical power supply line 25 is interrupted if
at least one of the first and second safety relays 24, 26 is opened.
[0027] The brakes 32, 36, 40 are configured to engage for braking the elevator car 6 when
the electrical power supply line 25 is interrupted so that it does not supply any
electrical voltage/current from the electrical power supply 22 to the brakes 32, 36,
40. The brakes 32, 36, 40 are further configured to disengage (release) in order to
allow the elevator car 6 to move in case both safety relays 24, 26 are closed so that
electrical power supply line 25 supplies electrical voltage/current from the electrical
power supply 22 to the brakes 32, 36, 40.
[0028] The safety relays 24, 26 are controlled by an overlaying safety chain 82. When the
safety chain 82 is interrupted, the safety relays 24, 26 open interrupting the power
supply line 25, which engages the brakes 32, 36, 40.
[0029] Free-wheeling diodes 50, 52, 54 and an electrical damping circuit 48 comprising a
capacity and inductivities are provided in order to absorb electrical stress peaks
which occur within the electrical power supply line 25 when the relays 24, 26 and/or
the brakes 32, 36, 40 are engaged and/or disengaged.
[0030] The electrical circuit 20 further comprises five brake sensors (first to fifth brake
sensors) 34, 38, 42, 44, 46. A brake sensor 34, 38, 42 is associated with each of
the brakes 32, 36, 40, respectively. Each brake sensor 34, 38, 42 is configured for
detecting the status ("engaged" or "disengaged") of the respective associated brake
32, 36, 40.
[0031] The brake sensors 34, 38, 42 in particular may be provided as mechanical switches,
which are configured to be operated by the movement of a moving part, such as an armature
or a brake shoe, of the associated brake 32, 36, 40. As a result, each brake sensor
34, 38, 42 provides an electrical detection signal indicating the current status of
the respective associated brake 32, 36, 40.
[0032] The detection signals provided by the brake sensor 34, 38, 42 are delivered to the
control unit 30. This allows the control unit 30 to monitor the operation of the brakes
32, 36, 40.
[0033] In the exemplary configuration shown in Figure 2, the fourth and fifth brake sensors
44, 46 are electrically connected with the control unit 30 but are not associated,
i.e. mechanically connected, with a corresponding brake.
[0034] The fourth and fifth brake sensors 44, 46 e.g. may be associated with a corresponding
brake in case the electrical circuit 20 is employed in a different type of elevator
system 2 comprising more than three brakes 32, 36, 40.
[0035] Figure 3 depicts the electrical circuit 20 shown in Figure 2 in a state of brake
test operation. In said state of brake test operation, one brake 40, which in the
following is called the "third brake" 40, is electrically connected by means of a
bypass line 55 with a position 29 of the electrical power supply line 25 which is
located between the first and second safety relays 24, 26. As a result, said third
brake 40 is not engaged even if the second relay 26 is opened. Instead, only two brakes
(the "first" and "second" brakes) 32, 36 of the three brakes 32, 36, 40 are engaged.
[0036] Activating and engaging only two brakes 32, 36 allows to check whether the engagement
of only two of the three brakes 32, 36, 40 is sufficient for reliably stopping and/or
holding the elevator car 6.
[0037] Even when switched to the state of brake test operation, the electrical circuit 20
shown in Figures 2 and 3 allows to reliably stop the elevator car 6 in case of real
emergency situation using all three brakes 32, 36, 40, as all three brakes 32, 36,
40 are engaged when the first safety relay 24 is opened, which interrupts the supply
of electrical voltage/current to all three brakes 32, 36, 40. This enhances the safety
of the elevator system 2.
[0038] In the state of brake test operation, in addition to bypassing the second relay 26,
the output line 47 of at least one of the brake sensors 34, 38, 42, 44, 46 is set
to a predefined electrical potential V*, for example to an electrical potential V*
of +24 V, representing a "forbidden state", i.e. a state which does not occur during
normal operation of the elevator system 2.
[0039] The control unit 30 detects said "forbidden state" as a signal indicating the state
of brake test operation, and switches the operation of the elevator system 2 to a
brake test mode. Switching the elevator system 2 to the brake test mode prevents normal
operation of the elevator system 2 when at least one of the brakes 32, 36, 40 is deactivated.
In the brake test mode, the control unit 30 of the elevator system 2 does not allow
the transportation of passengers. Rather, only restricted operation, e.g. operation
which is controlled by a key or password, for testing the activated brakes 32, 36
is allowed by the control unit 30. In the brake test mode, the control unit 30 in
particular opens the second relay 26 via a signal line 84, but it does not open the
first relay 24. The first relay is opened by the safety chain 82 only in a real emergency
situation in order to engage all brakes 32, 36, 40.
[0040] In the embodiment shown in Figure 3, the output signal of a fifth brake sensor 46,
which is not associated with one of the brakes 32, 36, 40 is used for indicating the
state of brake test operation. This, however, is only exemplary and the skilled person
will understand that the output signal of any of the brake sensors 34, 38, 42, 44,
46 may be used for indicating the state of brake test operation if the control unit
30 is configured accordingly. Even further, any signal, which is input into the control
unit 30, may be set to a "forbidden state" in order to indicate the state of brake
test operation.
[0041] Figures 4a and 4b schematically illustrate the operation of the brake sensors 34,
38, 42, 44, 46 in the state of normal operation (Figure 4a) and in the state of brake
test operation (Figure 4b), respectively.
[0042] In the state of normal operation (Figure 4a) the first three brake sensors 34, 38,
42 open and close in correspondence with engaging and disengaging (releasing) the
respectively associated brake 32, 36, 40. The brakes 32, 36, 40 are not shown in Figures
4a and 4b.
[0043] The fourth and fifth brake sensors 44, 46 are not associated with one of the brakes
32, 36, 40. Thus, they are not used in normal operation and therefore remain in a
constant, e.g. open, state.
[0044] In the state of brake test operation (Figure 4b) the third brake sensor 42 remains
in a constant state as well, as the third brake 40 is deactivated by means of the
bypass line 55 and thus remains in a disengaged (released) state, as it has been described
before with respect to Figure 3.
[0045] Additionally, the output line 47 of the fifth brake sensors 46 is set ("pinned")
to a predefined electrical potential V* representing a "forbidden state" indicating
the state of brake test operation.
[0046] Figures 5 and 6 schematically illustrate the switching between the state of normal
operation and the state of brake test operation by means of an electrical connection
device 68 which is provided by a combination of a plug 64 and two sockets 56, 58.
[0047] Two sockets 56, 58 are provided on a printed circuit board 62, which is depicted
only schematically in Figures 5 and 6. One of the two sockets 56, 58 is configured
as a normal operation socket 56 and the other one of the two sockets 56, 58 is configured
as brake test operation socket 58.
[0048] Switching between the state of normal operation and the state of brake test operation
is performed by selectively plugging the plug 64 into one of the two sockets 56, 58.
[0049] The three brakes 32, 36, 40 are shown on the right side of Figures 5 and 6. In order
to simplify Figures 5 and 6, from the five brake sensors 32, 38, 42, 44, 46, shown
in Figure 3 only the first brake sensor 34, which is associated with the first brake
32, and the fifth brake sensor 46, which is not associated with any of the brakes
32, 36, 40, are shown in Figures 5 and 6.
[0050] In case the plug 64 is plugged into the normal operation socket 56 for switching
to the state of normal operation (see Figure 5), all three brakes 32, 34, 36 are connected
to an output side 27 of the second safety relay 26. This allows to control all three
brakes 32, 34, 36 by switching said second safety relay 26, as it is has been described
before with reference to Figure 2.
[0051] The plug 64 also comprises an electrical bridge 60, which connects the output line
47 of the fifth brake sensor 46 with ground potential, when the plug 64 is plugged
into the normal operation socket 56.
[0052] The signal of the first brake sensor 34, as well as the signals of the second and
third brake sensors 38, 42, which are not shown in Figures 5 and 6, are delivered
via the plug 64 to the control unit 30.
[0053] If the plug 64 is plugged into the brake test operation socket 58 for switching to
the state of brake test operation (see Figure 6), only the first and second brakes
32, 36 are electrically connected with the output side 27 of the second relay 26.
The third brake 40 is electrically connected to the position 29 of the electrical
power supply line 25 located between the first and second safety relays 26, 28 (cf.
Figure 3). As a result, the third brake 40 is not engaged when the second safety relay
26 opens.
[0054] Simultaneously, the electrical bridge 60 of the plug 64 connects the output line
47 of the fifth brake sensor 46 to the predefined electrical potential V* representing
a "forbidden state" which causes the control unit 30 to detect the state of brake
test operation, as it has been described before.
[0055] A selection device 66, which may be provided in the form of an electrical connector,
is provided between the sockets 56, 58 and the brakes 32, 36, 40. The selection device
66 allows to select the brake 32, 36, 40 which is to be deactivated. This allows to
consecutively deactivate any of the brakes 32, 36, 40 in order to check whether every
possible combination of two brakes out of the three brakes 32, 36, 40 provides the
necessary braking capacity for braking the elevator car 6.
Although the exemplary embodiment shown in the figures comprises three brakes 32,
36, 40 and five brake sensors 32, 38, 42, 44, 46, the skilled person will understand
that the invention may be employed correspondingly in elevator systems 2 comprising
different numbers of brakes and brake sensors, respectively. A number of optional
features are set out in the following. These features may be realized in particular
embodiments, alone or in combination with any of the other features.
[0056] According to the invention according to claim 3 the elevator system comprises a power
supply line with at least two serially connected safety relays, wherein, in the state
of brake test operation, the deactivated brake is not engaged when one of the relays
is opened, but all brakes including the deactivated brake are engaged when another
one of the safety relays is opened. This allows for a safe operation of the elevator
system even in the state of brake test operation, as all brakes may be engaged in
a real emergency situation by opening one of the at least one other safety relays.
[0057] According to the invention according to claim 1 the elevator system comprises a plurality
of brake sensors wherein at least one brake sensor is associated with each of the
brakes, respectively. The brake sensors are configured for detecting the actual status
of the respective associated brake and providing corresponding output signals. The
control unit is configured for receiving the output signals from the brake sensors
indicating the status of the respective associated brake. In such a configuration
the signal indicating the state of brake test operation may be an output signal of
at least one of the brake sensors, which in particular is set to a "forbidden state",
i.e. a state which does not occur in normal operation.
[0058] Brake sensors allow to conveniently monitor the proper operation of the brakes. Using
an output signal of at least one of the brake sensors provides a convenient way for
indicating the state of brake test operation which in particular does not require
considerable and expensive modifications of the control unit.
[0059] According to one embodiment, at least one of the brake sensors may be a mechanical
switch which is operated by the movement of an armature and/or a brake shoe of an
associated brake. A mechanical switch provides an inexpensive and reliable brake sensor.
However, different types of brake sensors, such as optical, inductive or capacitive
types of brake sensors, may be employed as well.
[0060] According to one embodiment, the connection device may include a normal operation
socket corresponding to the state of normal operation, a brake test operation socket
corresponding to the state of brake test operation, and a plug which is selectively
pluggable into the normal operation socket and into the brake test operation socket
for switching between the state of normal operation and the state of brake test operation.
Such a configuration allows for an easy, convenient, reliable and secure switching
between the state of normal operation and the state of brake test operation.
[0061] According to one embodiment, the elevator system may further comprise a selection
device which is configured for selecting at least one brake, which is to be deactivated,
from the plurality of brakes. This allows to selectively deactivate each of the brakes
for testing all possible combinations of non-deactivated brakes.
[0062] According to one embodiment, the elevator system may comprise more brake sensors
than brakes. The elevator system in particular may comprise at least one brake sensor
which is not associated with any of the brakes. Such a configuration allows to use
on output signal of one of the additional brake sensors, which is not associated with
any of the brakes, for indicating the state of brake test operation.
[0063] According to one embodiment, the elevator system may comprise at least three brakes,
wherein the electrical connection device is configured to deactivate one of the brakes
in the state of brake test operation. The elevator system further may comprise at
least five brake sensors.
[0064] According to one embodiment, operating the elevator system in the brake test mode
may include braking the elevator car with at least one non-deactivated brake. This
allows to check whether the elevator car is reliably stopped and held by the remaining
brakes in case one of the plurality of brakes fails.
[0065] According to one embodiment, the method may include opening one of said at least
two safety relays for engaging the at least one non-deactivated brake. The method
may further include activating all brakes by opening another one of said at least
two safety relays.
[0066] According to one embodiment, the method may include consecutively deactivating each
of the brakes and operating the elevator system in the brake test mode. The brake
test mode in particular may include engaging at least one non-deactivated brake in
order to check all possible combinations of non-deactivated brakes.
[0067] While the invention has been described with reference to exemplary embodiments, it
will be understood by those skilled in the art that various changes may be made and
equivalents may be substituted for elements thereof without departing from the scope
of the invention. In addition many modifications may be made to adopt a particular
situation or material to the teachings of the invention without departing from the
essential scope thereof. Therefore, it is intended that the invention shall not be
limited to the particular embodiment disclosed, but that the invention includes all
embodiments falling within the scope of the dependent claims.
References
[0068]
- 2
- elevator system
- 3
- tension member
- 4
- hoistway
- 5
- drive unit
- 6
- elevator car
- 7a
- landing control panel
- 7b
- elevator car control panel
- 8
- landing
- 11
- landing door
- 12
- elevator car door
- 14
- guide rail
- 20
- electrical circuit
- 22
- electrical power supply
- 24
- (first) safety relay
- 25
- power supply line
- 26
- (second) safety relay
- 27
- output side of the second safety relay
- 29
- position between the first and second safety relays
- 30
- control unit
- 32
- first brake
- 34
- first brake sensor
- 36
- second brake
- 38
- second brake sensor
- 40
- third brake
- 42
- third brake sensor
- 44
- fourth brake sensor
- 46
- fifth brake sensor
- 47
- output line of the fifth brake sensor
- 48
- electrical damping circuit
- 52, 52, 54
- free-wheeling diodes
- 55
- bypass line
- 56
- normal operation socket
- 58
- brake test operation socket
- 60
- electrical bridge
- 62
- printed circuit board
- 64
- plug
- 66
- selection device
- 68
- electrical connection device
- 70
- motor
- 72
- sheave
- 74, 76, 78
- brake disks
- 80
- axle of the motor
- 82
- safety chain
- 84
- signal line
1. An elevator system (2) comprising:
an elevator car (6), which is movably arranged within a hoistway (4);
a drive unit (5), which is configured for driving the elevator car (6);
at least two brakes (32, 36, 40), which are respectively configured for braking the
elevator car (6);
a control unit (30), which is configured for controlling the drive unit (5) and the
at least two brakes (32, 36, 40); and
an electrical connection device (68), which is switchable between a state of normal
operation and a state of brake test operation;
wherein the elevator system (2) is configured such that, when the electrical connection
device (68) is switched into the state of brake test operation, at least one of the
brakes (32, 36, 40) is deactivated and a signal indicating the state of brake test
operation is supplied to the control unit (30); and
wherein the control unit (30) is configured to operate the elevator system (2) in
a brake test mode, if it detects the signal indicating the state of brake test operation;
characterized in that the elevator system (2) further comprises a plurality of brake sensors (34, 38, 42,
44, 46), wherein at least one brake sensor (34, 38, 42) is associated with each of
the brakes (32, 36, 40), respectively, and configured for detecting the actual status
of the associated brake (32, 36, 40); and in that
the control unit (30) is configured for receiving signals from the brake sensors (34,
38, 42, 44, 46) indicating the status of the respective associated brake (32, 36,
40), wherein the signal indicating the state of brake test operation is an output
signal of at least one of the brake sensors (34, 38, 42, 44, 46).
2. The elevator system (2) according to claim 1, further comprising an electrical power
supply line (25) including at least two safety relays (24, 26), which are serially
connected to each other, wherein, in the state of brake test operation, only the brakes
(32, 36), which are not deactivated, are engaged when one of the safety relays (24,
26) is opened, but all brakes (32, 36, 40) including the at least one deactivated
brake (40) are engaged when another one of the safety relays (24, 26) is opened.
3. An elevator system (2) comprising:
an elevator car (6), which is movably arranged within a hoistway (4);
a drive unit (5), which is configured for driving the elevator car (6);
at least two brakes (32, 36, 40), which are respectively configured for braking the
elevator car (6);
a control unit (30), which is configured for controlling the drive unit (5), which
controls the at least two brakes (32, 36, 40); and
an electrical connection device (68), which is switchable between a state of normal
operation and a state of brake test operation;
characterized in that the elevator system (2) further comprises an electrical power supply line (25) including
at least two safety relays (24, 26), which are serially connected to each other; and
in that
the elevator system (2) is configured such that when the electrical connection device
(68) is switched into the state of brake test operation, at least one of the brakes
(32, 36, 40) is deactivated so that only the brakes (32, 36), which are not deactivated,
are engaged when one of the safety relays (24, 26) is opened, but all brakes (32,
36, 40) including the at least one deactivated brake (40) are engaged when the other
one of the safety relays (24, 26) is opened.
4. The elevator system (2) according to claim 3, further comprising a plurality of brake
sensors (34, 38, 42, 44, 46),
wherein at least one brake sensor (34, 38, 42) is associated with each of the brakes
(32, 36, 40), respectively, and configured for detecting the actual status of the
associated brake (32, 36, 40),
wherein the control unit (30) is configured for receiving signals from the brake sensors
(34, 38, 42, 44, 46) indicating the status of the respective associated brake (32,
36, 40); and
wherein the signal indicating the state of brake test operation is an output signal
of at least one of the brake sensors (34, 38, 42, 44, 46).
5. The elevator system (2) according to any of the previous claims, wherein at least
one of the brake sensors (34, 38, 42, 44, 46) is a mechanical switch, particularly
a mechanical switch which is operated by movement of a moving part of an associated
brake (32, 36, 40).
6. The elevator system (2) according to any of the previous claims, wherein the electrical
connection device (68) includes a normal operation socket (56) corresponding to the
state of normal operation, a brake test operation socket (58) corresponding to the
state of brake test operation, and a plug (64) which is selectively pluggable into
the normal operation socket (56) and into the brake test operation socket (58) for
switching between the state of normal operation and the state of brake test operation.
7. The elevator system (2) according to any of the previous claims comprising a selection
device (66) which is configured to allow selecting the at least one brake (40), which
is to be deactivated, from the plurality of brakes (32, 36, 40).
8. The elevator system (2) according to any of the previous claims comprising more brake
sensors (34, 38, 42, 44, 46) than brakes (32, 36, 40), wherein the brake sensors (34,
38, 42, 44, 46) in particular comprise at least one brake sensor (34, 38, 42, 44,
46) which is not associated with any of the brakes (32, 36, 40).
9. The elevator system (2) according to any of the previous claims comprising at least
three brakes (32, 36, 40) and/or comprising at least five brake sensors (34, 38, 42,
44, 46).
10. A method of testing an elevator system (2) comprising:
an elevator car (6), which is movably arranged within a hoistway (4);
a drive unit (5), which is configured for driving the elevator car (6);
at least two brakes (32, 36, 40), which are respectively configured for braking the
elevator car (6);
a plurality of brake sensors (34, 38, 42, 44, 46), wherein at least one brake sensor
(34, 38, 42) is associated with each of the brakes (32, 36, 40), respectively, and
configured for detecting the actual status of the associated brake (32, 36, 40);
a control unit (30), which is configured for controlling the drive unit (5) and the
at least two brakes (32, 36, 40); wherein the control unit (30) is further configured
for receiving signals from the brake sensors (34, 38, 42, 44, 46) indicating the status
of the respective associated brake (32, 36, 40), characterized in that the signal indicating the state of brake test operation, is an output signal of at
least one of the brake sensors (34, 38, 42, 44, 46); and
an electrical connection device (68), which is switchable between a state of normal
operation and a state of brake test operation;
wherein the method includes:
switching the electrical connection device (68) from the state of normal operation
to the state of brake test operation;
wherein, when the electrical connection device (68) is in the state of brake test
operation, at least one of the brakes (32, 36, 40) is deactivated and a signal indicating
the state of brake test operation is supplied to the drive unit (5); and
wherein the drive unit (5) is configured to operate the elevator system (2) in a brake
test mode if it detects the signal indicating the state of brake test operation.
11. The method according to claim 10, wherein the elevator system (2) comprises an electrical
power supply line (25) including at least two safety relays (24, 26), which are serially
connected to each other,
wherein, in the state of brake test operation, only the brakes (32, 36), which are
not deactivated, are engaged when one of the safety relays (24, 26) is opened, but
all brakes (32, 36, 40) including the at least one deactivated brake (40) are engaged
when another one of the safety relays (24, 26) is opened; and
wherein the method includes engaging the brakes (32, 36), which are not deactivated,
by opening one of the safety relays (24, 26).
12. A method of testing an elevator system (2) comprising:
an elevator car (6), which is movably arranged within a hoistway (4);
a drive unit (5), which is configured for driving the elevator car (6);
at least two brakes (32, 36, 40), which are respectively configured for braking the
elevator car (6);
a control unit (30), which is configured for controlling the drive unit (5) and the
at least two brakes (32, 36, 40);
an electrical connection device (68), which is switchable between a state of normal
operation and a state of brake test operation in which at least one of the brakes
(32, 36, 40) is deactivated; and
an electrical power supply line (25) including at least two safety relays (24, 26),
which are serially connected to each other, wherein, in the state of brake test operation,
only the brakes (32, 36), which are not deactivated, are engaged when one of the safety
relays (24, 26) is opened, but all brakes (32, 36, 40) including the at least one
deactivated brake (40) are engaged when another one of the safety relays (24, 26)
is opened; and
wherein the method includes:
switching the electrical connection device (68) from the state of normal operation
to the state of brake test operation; and
engaging the brakes (32, 36), which are not deactivated, by opening one of the safety
relays (24, 26).
13. The method according to claim 12,
wherein the elevator system (2) comprises a plurality of brake sensors (34, 38, 42,
44, 46), wherein at least one brake sensor (34, 38, 42) is associated with each of
the brakes (32, 36, 40), respectively, and configured for detecting the actual status
of the associated brake (32, 36, 40),
wherein the control unit (30) is configured for receiving signals from the brake sensors
(34, 38, 42, 44, 46) indicating the status of the respective associated brake (32,
36, 40) and;
wherein the signal indicating the state of brake test operation, is an output signal
of at least one of the brake sensors (34, 38, 42, 44, 46).
14. The method according to any of claims 11 to 13, wherein the method includes engaging
all brakes (32, 36, 40) by opening another one of the safety relays (24, 26).
15. The method according to any of claims 10 to 14, wherein the method includes consecutively
deactivating each of the brakes (32, 36, 40) and operating the elevator system (2)
in the brake test mode, which includes engaging at least one brake (32, 36) which
is not deactivated.
1. Aufzugsystem (2), Folgendes umfassend:
einen Fahrkorb (6), der beweglich in einem Schacht (4) angeordnet ist;
eine Antriebseinheit (5), die dazu konfiguriert ist, den Fahrkorb (6) anzutreiben;
mindestens zwei Bremsen (32, 36, 40), die jeweils zum Bremsen des Fahrkorbs (6) konfiguriert
sind;
eine Steuereinheit (30), die dazu konfiguriert ist, die Antriebseinheit (5) und die
mindestens zwei Bremsen (32, 36, 40) zu steuern; und
eine elektrische Anschlussvorrichtung (68), die zwischen einem Zustand eines Normalbetriebs
und einem Zustand eines Bremstestbetriebs schaltbar ist;
wobei das Aufzugsystem (2) derart konfiguriert ist, dass mindestens eine der Bremsen
(32, 36, 40) deaktiviert ist und ein Signal, das den Zustand des Bremstestbetriebs
anzeigt, an die Steuereinheit (30) geliefert wird, wenn die elektrische Anschlussvorrichtung
(68) in den Zustand eines Bremstestbetriebs geschaltet wird; und
wobei die Steuereinheit (30) dazu konfiguriert ist, das Aufzugsystem (2) in einem
Bremstestmodus zu betreiben, wenn es das Signal detektiert, das den Zustand eines
Bremstestbetriebs anzeigt;
dadurch gekennzeichnet, dass das Aufzugsystem (2) ferner eine Vielzahl von Bremssensoren (34, 38, 42, 44, 46)
umfasst, wobei jeder der Bremsen (32, 36, 40) jeweils mindestens ein Bremssensor (34,
38, 42) zugeordnet ist, der dazu konfiguriert ist, den tatsächlichen Zustand der zugeordneten
Bremse (32, 36, 40) zu detektieren; und dadurch, dass
die Steuereinheit (30) dazu konfiguriert ist, Signale von den Bremssensoren (34, 38,
42, 44, 46) zu empfangen, die den Zustand der jeweiligen zugeordneten Bremse (32,
36, 40) anzeigen, wobei das Signal, das den Zustand des Bremstestbetriebs anzeigt,
ein Ausgabesignal von mindestens einem der Bremssensoren (34, 38, 42, 44, 46) ist.
2. Aufzugsystem (2) nach Anspruch 1, ferner umfassend eine elektrische Spannungsversorgungsleitung
(25), die mindestens zwei Sicherheitsrelais (24, 26) einschließt, die zueinander in
Reihe geschaltet sind, wobei in dem Zustand eines Bremstestbetriebs nur die Bremsen
(32, 36) greifen, die nicht deaktiviert sind, wenn eines der Sicherheitsrelais (24,
26) geöffnet ist, aber alle Bremsen (32, 36, 40) greifen, einschließlich der mindestens
einen deaktivierten Bremse (40), wenn ein weiteres der Sicherheitsrelais (24, 26)
geöffnet ist.
3. Aufzugsystem (2), Folgendes umfassend:
einen Fahrkorb (6), der beweglich in einem Schacht (4) angeordnet ist;
eine Antriebseinheit (5), die dazu konfiguriert ist, den Fahrkorb (6) anzutreiben;
mindestens zwei Bremsen (32, 36, 40), die jeweils zum Bremsen des Fahrkorbs (6) konfiguriert
sind;
eine Steuereinheit (30), die dazu konfiguriert ist, die Antriebseinheit (5) zu steuern,
die die mindestens zwei Bremsen (32, 36, 40) steuert; und
eine elektrische Anschlussvorrichtung (68), die zwischen einem Zustand eines Normalbetriebs
und einem Zustand eines Bremstestbetriebs schaltbar ist;
dadurch gekennzeichnet, dass das Aufzugsystem (2) ferner eine elektrische Spannungsversorgungsleitung (25) umfasst,
die mindestens zwei Sicherheitsrelais (24, 26) einschließt, die zueinander in Reihe
geschaltet sind; und dadurch, dass
das Aufzugsystem (2) derart konfiguriert ist, dass mindestens eine der Bremsen (32,
36, 40) deaktiviert ist, sodass nur die Bremsen (32, 36) greifen, die nicht deaktiviert
sind, wenn eines der Sicherheitsrelais (24, 26) geöffnet ist, wenn die elektrische
Anschlussvorrichtung (68) in den Zustand eines Bremstestbetriebs geschaltet wird,
aber alle Bremsen (32, 36, 40) greifen, wenn das andere Sicherheitsrelais (24, 26)
geöffnet ist, einschließlich der mindestens einen deaktivierten Bremse (40) .
4. Aufzugsystem (2) nach Anspruch 3, ferner umfassend eine Vielzahl von Bremssensoren
(34, 38, 42, 44, 46),
wobei jeder der Bremsen (32, 36, 40) jeweils mindestens ein Bremssensor (34, 38, 42)
zugeordnet ist, der dazu konfiguriert ist, den tatsächlichen Zustand der zugeordneten
Bremse (32, 36, 40) zu detektieren,
wobei die Steuereinheit (30) dazu konfiguriert ist, Signale von den Bremssensoren
(34, 38, 42, 44, 46) zu empfangen, die den Zustand der jeweiligen zugeordneten Bremse
(32, 36, 40) anzeigen; und
wobei das Signal, das den Zustand des Bremstestbetriebs anzeigt, ein Ausgabesignal
von mindestens einem der Bremssensoren (34, 38, 42, 44, 46) ist.
5. Aufzugsystem (2) nach einem der vorstehenden Ansprüche, wobei mindestens einer der
Bremssensoren (34, 38, 42, 44, 46) ein mechanischer Schalter ist, insbesondere ein
mechanischer Schalter, der durch eine Bewegung eines beweglichen Teils einer zugeordneten
Bremse (32, 36, 40) betrieben wird.
6. Aufzugsystem (2) nach einem der vorstehenden Ansprüche, wobei die elektrische Anschlussvorrichtung
(68) eine Normalbetriebsbuchse (56), die dem Zustand eines Normalbetriebs entspricht,
eine Bremstestbetriebsbuchse (58), die dem Zustand eines Bremstestbetriebs entspricht,
und einen Stecker (64) einschließt, der wahlweise in die Normalbetriebsbuchse (56)
und in die Bremstestbetriebsbuchse (58) steckbar ist, um zwischen dem Zustand eines
Normalbetriebs und dem Zustand eines Bremstestbetriebs zu schalten.
7. Aufzugsystem (2) nach einem der vorstehenden Ansprüche, umfassend eine Auswahlvorrichtung
(66), die dazu konfiguriert ist, ein Auswählen der mindestens einen Bremse (40), die
zu deaktivieren ist, aus der Vielzahl von Bremsen (32, 36, 40) zu erlauben.
8. Aufzugsystem (2) nach einem der vorstehenden Ansprüche, das mehr Bremssensoren (34,
38, 42, 44, 46) als Bremsen (32, 36, 40) umfasst, wobei die Bremssensoren (34, 38,
42, 44, 46) insbesondere mindestens einen Bremssensor (34, 38, 42, 44, 46) umfassen,
der nicht einer der Bremsen (32, 36, 40) zugeordnet ist.
9. Aufzugsystem (2) nach einem der vorstehenden Ansprüche, umfassend mindestens drei
Bremsen (32, 36, 40) und/oder umfassend mindestens fünf Bremssensoren (34, 38, 42,
44, 46).
10. Testverfahren eines Aufzugsystems (2), Folgendes umfassend:
einen Fahrkorb (6), der beweglich in einem Schacht (4) angeordnet ist;
eine Antriebseinheit (5), die dazu konfiguriert ist, den Fahrkorb (6) anzutreiben;
mindestens zwei Bremsen (32, 36, 40), die jeweils zum Bremsen des Fahrkorbs (6) konfiguriert
sind;
eine Vielzahl von Bremssensoren (34, 38, 42, 44, 46), wobei jeder der Bremsen (32,
36, 40) jeweils mindestens ein Bremssensor (34, 38, 42) zugeordnet ist, der dazu konfiguriert
ist, den tatsächlichen Zustand der zugeordneten Bremse (32, 36, 40) zu detektieren;
eine Steuereinheit (30), die dazu konfiguriert ist, die Antriebseinheit (5) und die
mindestens zwei Bremsen (32, 36, 40) zu steuern; wobei die Steuereinheit (30) ferner
dazu konfiguriert ist, Signale von den Bremssensoren (34, 38, 42, 44, 46) zu empfangen,
die den Zustand der jeweiligen zugeordneten Bremse (32, 36, 40) anzeigen, dadurch gekennzeichnet, dass das Signal, das den Zustand des Bremstestbetriebs anzeigt, ein Ausgabesignal von
mindestens einem der Bremssensoren (34, 38, 42, 44, 46) ist; und
eine elektrische Anschlussvorrichtung (68), die zwischen einem Zustand eines Normalbetriebs
und einem Zustand eines Bremstestbetriebs schaltbar ist;
wobei das Verfahren Folgendes einschließt:
Schalten der elektrischen Anschlussvorrichtung (68) zwischen dem Zustand eines Normalbetriebs
und dem Zustand eines Bremstestbetriebs;
wobei mindestens eine der Bremsen (32, 36, 40) deaktiviert ist und ein Signal, das
den Zustand des Bremstestbetriebs anzeigt, an die Antriebseinheit (5) geliefert wird,
wenn die elektrische Anschlussvorrichtung (68) in dem Zustand eines Bremstestbetriebs
ist; und
wobei die Antriebseinheit (5) dazu konfiguriert ist, das Aufzugsystem (2) in einem
Bremstestmodus zu betreiben, wenn es das Signal detektiert, das den Zustand eines
Bremstestbetriebs anzeigt.
11. Verfahren nach Anspruch 10, wobei das Aufzugsystem (2) eine elektrische Spannungsversorgungsleitung
(25) umfasst, die mindestens zwei Sicherheitsrelais (24, 26) einschließt, die zueinander
in Reihe geschaltet sind,
wobei in dem Zustand eines Bremstestbetriebs nur die Bremsen (32, 36) greifen, die
nicht deaktiviert sind, wenn eines der Sicherheitsrelais (24, 26) geöffnet ist, aber
alle Bremsen (32, 36, 40) greifen, einschließlich der mindestens einen deaktivierten
Bremse (40), wenn ein weiteres der Sicherheitsrelais (24, 26) geöffnet ist; und
wobei das Verfahren ein Eingreifen der Bremsen (32, 36) einschließt, die nicht deaktiviert
sind, durch Öffnen eines der Sicherheitsrelais (24, 26).
12. Testverfahren eines Aufzugsystems (2), Folgendes umfassend:
einen Fahrkorb (6), der beweglich in einem Schacht (4) angeordnet ist;
eine Antriebseinheit (5), die dazu konfiguriert ist, den Fahrkorb (6) anzutreiben;
mindestens zwei Bremsen (32, 36, 40), die jeweils zum Bremsen des Fahrkorbs (6) konfiguriert
sind;
eine Steuereinheit (30), die dazu konfiguriert ist, die Antriebseinheit (5) und die
mindestens zwei Bremsen (32, 36, 40) zu steuern;
eine elektrische Anschlussvorrichtung (68), die zwischen einem Zustand eines Normalbetriebs
und einem Zustand eines Bremstestbetriebs schaltbar ist, in dem mindestens eine der
Bremsen (32, 36, 40) deaktiviert ist; und
eine elektrische Spannungsversorgungsleitung (25), die mindestens zwei Sicherheitsrelais
(24, 26) einschließt, die zueinander in Reihe geschaltet sind, wobei in dem Zustand
eines Bremstestbetriebs nur die Bremsen (32, 36) greifen, die nicht deaktiviert sind,
wenn eines der Sicherheitsrelais (24, 26) geöffnet ist, aber alle Bremsen (32, 36,
40) greifen, einschließlich der mindestens einen deaktivierten Bremse (40), wenn ein
weiteres der Sicherheitsrelais (24, 26) geöffnet ist; und
wobei das Verfahren Folgendes einschließt:
Schalten der elektrischen Anschlussvorrichtung (68) zwischen dem Zustand eines Normalbetriebs
in den Zustand eines Bremstestbetriebs; und
Eingreifen der Bremsen (32, 36), die nicht deaktiviert sind, durch Öffnen eines der
Sicherheitsrelais (24, 26).
13. Verfahren nach Anspruch 12,
wobei das Aufzugsystem (2) ferner eine Vielzahl von Bremssensoren (34, 38, 42, 44,
46) umfasst, wobei jeder der Bremsen (32, 36, 40) jeweils mindestens ein Bremssensor
(34, 38, 42) zugeordnet ist, der dazu konfiguriert ist, den tatsächlichen Zustand
der zugeordneten Bremse (32, 36, 40) zu detektieren,
wobei die Steuereinheit (30) dazu konfiguriert ist, Signale von den Bremssensoren
(34, 38, 42, 44, 46) zu empfangen, die den Zustand der jeweiligen zugeordneten Bremse
(32, 36, 40) anzeigen, und
wobei das Signal, das den Zustand des Bremstestbetriebs anzeigt, ein Ausgabesignal
von mindestens einem der Bremssensoren (34, 38, 42, 44, 46) ist.
14. Verfahren nach einem der Ansprüche 11 bis 13, wobei das Verfahren ein Eingreifen aller
Bremsen (32, 36, 40) durch Öffnen eines weiteren der Sicherheitsrelais (24, 26) einschließt.
15. Verfahren nach einem der Ansprüche 10 bis 14, wobei das Verfahren ein konsekutives
Deaktivieren jeder der Bremsen (32, 36, 40) und ein Betreiben des Aufzugsystems (2)
in dem Bremstestbetrieb einschließt, das ein Eingreifen mindestens einer Bremse (32,
36) einschließt, die nicht deaktiviert ist.
1. Système d'ascenseur (2) comprenant :
une cabine d'ascenseur (6), qui est disposée de manière mobile à l'intérieur d'une
cage d'ascenseur (4) ;
une unité d'entraînement (5), qui est configurée pour entraîner la cabine d'ascenseur
(6) ;
au moins deux freins (32, 36, 40), qui sont respectivement configurés pour freiner
la cabine d'ascenseur (6) ;
une unité de commande (30), qui est configurée pour commander l'unité d'entraînement
(5) et les au moins deux freins (32, 36, 40) ; et
un dispositif de connexion électrique (68), qui est commutable entre un état de fonctionnement
normal et un état de fonctionnement d'essai de freins ;
dans lequel le système d'ascenseur (2) est configuré de sorte que, lorsque le dispositif
de connexion électrique (68) est commuté dans l'état de fonctionnement d'essai de
freins, au moins l'un des freins (32, 36, 40) est désactivé et un signal indiquant
l'état de fonctionnement d'essai de freins est fourni à l'unité de commande (30) ;
et
dans lequel l'unité de commande (30) est configurée pour faire fonctionner le système
d'ascenseur (2) dans un mode d'essai de freins, si elle détecte le signal indiquant
l'état de fonctionnement d'essai de freins ;
caractérisé en ce que le système d'ascenseur (2) comprend en outre une pluralité de capteurs de frein (34,
38, 42, 44, 46), dans lequel au moins un capteur de frein (34, 38, 42) est associé
à chacun des freins (32, 36, 40), respectivement, et configuré pour détecter l'état
réel du frein associé (32, 36, 40) ; et en ce que
l'unité de commande (30) est configurée pour recevoir des signaux provenant des capteurs
de frein (34, 38, 42, 44, 46) indiquant l'état du frein associé respectif (32, 36,
40), dans lequel le signal indiquant l'état de fonctionnement d'essai de freins est
un signal de sortie d'au moins l'un des capteurs de frein (34, 38, 42, 44, 46).
2. Système d'ascenseur (2) selon la revendication 1, comprenant en outre une ligne d'alimentation
électrique (25) comportant au moins deux relais de sécurité (24, 26), qui sont reliés
entre eux en série, dans lequel, dans l'état de fonctionnement d'essai de freins,
seuls les freins (32, 36), qui ne sont pas désactivés, sont engagés lorsque l'un des
relais de sécurité (24, 26) est ouvert, mais tous les freins (32, 36, 40) comportant
l'au moins un frein désactivé (40) sont engagés lorsqu'un autre des relais des sécurité
(24, 26) est ouvert.
3. Système d'ascenseur (2) comprenant :
une cabine d'ascenseur (6), qui est disposée de manière mobile à l'intérieur d'une
cage d'ascenseur (4) ;
une unité d'entraînement (5), qui est configurée pour entraîner la cabine d'ascenseur
(6) ;
au moins deux freins (32, 36, 40), qui sont respectivement configurés pour freiner
la cabine d'ascenseur (6) ;
une unité de commande (30), qui est configurée pour commander l'unité d'entraînement
(5), qui commande les au moins deux freins (32, 36, 40) ; et
un dispositif de connexion électrique (68), qui est commutable entre un état de fonctionnement
normal et un état de fonctionnement d'essai de freins ;
caractérisé en ce que le système d'ascenseur (2) comprend en outre une ligne d'alimentation électrique
(25) comportant au moins deux relais de sécurité (24, 26), qui sont reliés entre eux
en série ; et en ce que
le système d'ascenseur (2) est configuré de sorte que lorsque le dispositif de connexion
électrique (68) est commuté dans l'état de fonctionnement d'essai de freins, au moins
l'un des freins (32, 36, 40) est désactivé de sorte que seuls les freins (32, 36),
qui ne sont pas désactivés, sont engagés lorsque l'un des relais de sécurité (24,
26) est ouvert, mais tous les freins (32, 26, 40) comportant l'au moins un frein désactivé
(40) sont engagés lorsque l'autre des relais de sécurité (24, 26) est ouvert.
4. Système d'ascenseur (2) selon la revendication 3, comprenant en outre une pluralité
de capteurs de frein (34, 38, 42, 44, 46),
dans lequel au moins un capteur de frein (34, 38, 42) est associé à chacun des freins
(32, 36, 40), respectivement, et configuré pour détecter l'état réel du frein associé
(32, 36, 40),
dans lequel l'unité de commande (30) est configurée pour recevoir des signaux provenant
des capteurs de frein (34, 38, 42, 44, 46) indiquant l'état du frein associé respectif
(32, 36, 40) ; et
dans lequel le signal indiquant l'état de fonctionnement d'essai de freins est un
signal de sortie d'au moins l'un des capteurs de frein (34, 38, 42, 44, 46).
5. Système d'ascenseur (2) selon l'une quelconque des revendications précédentes, dans
lequel au moins l'un des capteurs de frein (34, 38, 42, 44, 46) est un commutateur
mécanique, en particulier un commutateur mécanique qui est actionné par le mouvement
d'une partie mobile d'un frein associé (32, 36, 40).
6. Système d'ascenseur (2) selon l'une quelconque des revendications précédentes, dans
lequel le dispositif de connexion électrique (68) comporte une prise de fonctionnement
normal (56) correspondant à l'état de fonctionnement normal, une prise de fonctionnement
d'essai de freins (58) correspondant à l'état de fonctionnement d'essai de freins,
et une fiche (64) qui est enfichable sélectivement dans la prise de fonctionnement
normal (56) et dans la prise fonctionnement d'essai de freins (58) pour commuter entre
l'état de fonctionnement normal et l'état de fonctionnement d'essai de freins.
7. Système d'ascenseur (2) selon l'une quelconque des revendications prévédentes comprenant
un dispositif de sélection (66) qui est configuré pour permettre la sélection de l'au
moins un frein (40), qui est destiné à être désactuvé, parmi la pluralité de freins
(32, 36, 40).
8. Système d'ascenseur (2) selon l'une quelconque des revendications précédentes comprenant
plus de capteurs de frein (34, 38, 42, 44, 46) que de freins (32, 36, 40), dans lequel
les capteurs de frein (34, 38, 42, 44, 46) comprennent en particulier au moins un
capteur de frein (34, 38, 42, 44, 46) qui n'est associé à aucun des freins (32, 36,
40).
9. Système d'ascenseur (2) selon l'une quelconque des revendications précédentes comprenant
au moins trois freins (32, 36, 40) et/ou comprenant au moins cinq capteurs de frein
(34, 38, 42, 44, 46).
10. Procédé d'essai d'un système d'ascenseur (2) comprenant :
une cabine d'ascenseur (6), qui est disposée de manière mobile à l'intérieur d'une
cage d'ascenseur (4) ;
une unité d'entraînement (5), qui est configurée pour entraîner la cabine d'ascenseur
(6) ;
au moins deux freins (32, 36, 40), qui sont respectivement configurés pour freiner
la cabine d'ascenseur (6) ;
une pluralité de capteurs de frein (34, 38, 42, 44, 46), dans lequel au moins un capteur
de frein (34, 38, 42) est associé à chacun des freins (32, 36, 40), respectivement,
et configuré pour détecter l'état réel du frein associé (32, 36, 40) ;
une unité de commande (30), qui est configurée pour commander l'unité d'entraînement
(5) et les au moins deux freins (32, 36, 40) ; dans lequel l'unité de commande (30)
est en outre configurée pour recevoir des signaux provenant des capteurs de frein
(34, 38, 42, 44, 46) indiquant l'état du frein associé respectif (32, 36, 40), caractérisé en ce que le signal indiquant l'état de fonctionnement d'essai de freins est un signal de sortie
d'au moins l'un des capteurs de frein (34, 38, 42, 44, 46) ; et
un dispositif de connexion électrique (68), qui est commutable entre un état de fonctionnement
normal et un état de fonctionnement d'essai de freins ;
dans lequel le procédé comporte :
la commutation du dispositif de connexion électrique (68) de l'état de fonctionnement
normal à l'état de fonctionnement d'essai de freins ;
dans lequel, lorsque le dispositif de connexion électrique (68) est dans l'état de
fonctionnement d'essai de freins, au moins l'un des freins (32, 36, 40) est désactivé
et un signal indiquant l'état de fonctionnement d'essai de freins est fourni à l'unité
d'entraînement (5) ; et
dans lequel l'unité d'entraînement (5) est configurée pour faire fonctionner le système
d'ascenseur (2) dans un mode d'essai de freins si elle détecte le signal indiquant
l'état de fonctionnement d'essai de freins ;
11. Procédé selon la revendication 10, dans lequel le système d'ascenseur (2) comprend
une ligne d'alimentation électrique (25) comportant au moins deux relais de sécurité
(24, 26), qui sont reliés entre eux en série,
dans lequel, dans l'état de fonctionnement d'essai de freins, seuls les freins (32,
36), qui ne sont pas désactivés, sont engagés lorsque l'un des relais de sécurité
(24, 26) est ouvert, mais tous les freins (32, 36, 40) comportant l'au moins un frein
désactivé (40) sont engagés lorsqu'un autre des relais de sécurité (24, 26) est ouvert
; et
dans lequel le procédé comporte l'engagement des freins (32, 36) qui ne sont pas désactivés,
en ouvrant l'un des relais de sécurité (24, 26).
12. Procédé d'essai d'un système d'ascenseur (2) comprenant :
une cabine d'ascenseur (6), qui est disposée de manière mobile à l'intérieur d'une
cage d'ascenseur (4) ;
une unité d'entraînement (5), qui est configurée pour entraîner la cabine d'ascenseur
(6) ;
au moins deux freins (32, 36, 40), qui sont respectivement configurés pour freiner
la cabine d'ascenseur (6) ;
une unité de commande (30), qui est configurée pour commander l'unité d'entraînement
(5) et les au moins deux freins (32, 36, 40) ;
un dispositif de connexion électrique (68), qui est commutable entre un état de fonctionnement
normal et un état de fonctionnement d'essai de freins dans lequel au moins l'un des
freins (32, 36, 40) est désactivé ; et
une ligne d'alimentation électrique (25) comportant au moins deux relais de sécurité
(24, 26), qui sont reliés entre eux en série, dans lequel, dans l'état de fonctionnement
d'essai de freins, seuls les freins (32, 36), qui ne sont pas désactivés, sont engagés
lorsque l'un des relais de sécurité (24, 26) est ouvert, mais tous les freins (32,
36, 40) comportant l'au moins un frein désactivé (40) sont engagés lorsqu'un autre
des relais de sécurité (24, 26) est ouvert ; et
dans lequel le procédé comporte :
la commutation du dispositif de connexion électrique (68) de l'état de fonctionnement
normal à l'état de fonctionnement d'essai de freins ; et
l'engagement des freins (32, 36), qui ne sont pas désactivés, en ouvrant l'un des
relais de sécurité (24, 26).
13. Procédé selon la revendication 12,
dans lequel le système d'ascenseur (2) comprend une pluralité de capteurs de frein
(34, 38, 42, 44, 46), dans lequel au moins un capteur de frein (34, 38, 42) est associé
à chacun des freins (32, 36, 40), respectivement, et configuré pour détecter l'état
réel du frein associé (32, 36, 40),
dans lequel l'unité de commande (30) est configurée pour recevoir des signaux provenant
des capteurs de frein (34, 38, 42, 44, 46) indiquant l'état du frein associé respectif
(32, 36, 40) et ;
dans lequel le signal indiquant l'état de fonctionnement d'essai de freins est un
signal de sortie d'au moins l'un des capteurs de frein (34, 38, 42, 44, 46).
14. Procédé selon l'une quelconque des revendications 11 à 13, dans lequel le procédé
comporte l'engagement de tous les freins (32, 36, 40) en ouvrant un autre des relais
de sécurité (24, 26) .
15. Procédé selon l'une quelconque des revendications 10 à 14, dans lequel le procédé
comporte la désactivation consécutive de chacun des freins (32, 36, 40) et le fonctionnement
du système d'ascenseur (2) dans le mode d'essai de freins, qui comporte l'engagement
d'au moins un frein (32, 36) qui n'est pas désactivé.