Technical Field
[0001] The present invention relates to an elevator apparatus having a control panel which
controls a brake device.
Background Art
[0002] In conventional elevator apparatus, the braking force of a brake device is controlled
so that the deceleration speed of a car obtains a prescribed value on the basis of
a deceleration command value and a speed signal during the detection of an abnormality
(refer to
JP 07-157211 A, for example). In the elevator apparatus described in
JP 07-157211 A, both the basic action during the detection of an abnormality and the control of
the braking force are performed by one braking force control unit. For this reason,
if the deceleration speed of a car becomes excessive due to a failure of the braking
force control unit and the like, a burden on a customer becomes large. And if the
deceleration speed of a car becomes too small, the braking distance becomes long and
the car comes into contact with the bottom part and top part of a shaft.
[0003] Therefore, there has been proposed an elevator apparatus which is such that an elevator
is brought into a standstill by activating a rope gripper during the detection of
an abnormality (refer to
JP 2007-55691 A, for example). However, in a machine-room-less elevator which has become mainstream
in recent years, it is difficult to obtain the installation space of a rope gripper.
[0004] In contrast to these elevator apparatus, there has been proposed an elevator apparatus
which is provided with first brake means which actuates a brake device during the
detection of an abnormality, and brings a car into an emergency stop and second brake
control means which reduces the braking force of the brake device when the deceleration
speed of a car has become not less than a prescribed value during the emergency braking
action (refer to
WO 2008/012896 A, for example). The above-described problems are solved by this configuration.
Summary of Invention
Technical Problem
[0005] However, in the elevator apparatus described in
WO 2008/012896 A, the configuration must be such that the second brake control means is actuated only
when the deceleration speed of the car has become not less than a prescribed value
at the time of emergency braking action by the first brake control means. For this
reason, the configuration becomes complex, posing the problem that it is difficult
to achieve the sharing of the platform of a control panel.
[0006] The present invention was made to solve the problem described above, and the object
of the invention is to provide an elevator apparatus which permits the sharing of
the platform of a control panel by simplifying a configuration for adding the function
of controlling a brake device during the detection of an abnormality.
Means for Solving Problems
[0007] The elevator apparatus of the present invention includes a first control section
which is provided on a control panel of an elevator and controls a brake device which
brakes a traction machine which causes a car arranged in a shaft of the elevator to
run, a detection section which is detachably provided on the control panel and detects
an abnormality of the elevator, and a second control section which is detachably provided
on the control panel and controls the brake device in place of the first control section
during the detection of the abnormality by the detection section.
Advantageous Effect of Invention
[0008] According to the present invention, the sharing of the platform of a control panel
can be achieved by simplifying a configuration for adding the function of controlling
a brake device during the detection of an abnormality.
Brief Description of Drawings
[0009]
Figure 1 is a basic block diagram of an elevator apparatus in Embodiment 1 of the
present invention.
Figure 2 is a general block diagram to explain the case where the function of protection
during a run with door open is added to the elevator apparatus of Figure 1.
Figure 3 is a circuit configuration diagram of the inside of a control panel before
the addition of the function of protection during a run with the door open to the
elevator apparatus in Embodiment 1 of the present invention.
Figure 4 is a circuit configuration diagram of the inside of a control panel after
the addition of the function of protection during a run with the door open to the
elevator apparatus in Embodiment 1 of the present invention.
Figure 5 is a flowchart to explain the action of protection of the elevator apparatus
during a run with the door open.
Figure 6 is a timing chart to explain the normal-time control condition of a brake
device used in the elevator apparatus in Embodiment 2 of the present invention.
Figure 7 is a timing chart to explain the abnormal-time control condition of a brake
device used in the elevator apparatus in Embodiment 2 of the present invention.
Figure 8 is a flowchart to explain the control procedure of the brake device by the
second control section of the elevator apparatus in Embodiment 2 of the present invention.
Figure 9 is a flowchart to explain the car deceleration reducing control by the second
control section of the elevator apparatus in Embodiment 2 of the present invention.
Description of Embodiments
[0010] Embodiments to carry out the present invention will be described with the aid of
the accompanying drawings. Incidentally, in each of the drawings, like numerals refer
to like or corresponding parts and overlaps of description of these parts are appropriately
simplified or omitted.
Embodiment 1
[0011] Figure 1 is a basic block diagram of an elevator apparatus in Embodiment 1 of the
present invention.
[0012] In Figure 1, reference numeral 1 denotes a commercial power source. This commercial
power source 1 is provided in a building where the elevator is provided. Reference
numeral 2 denotes a traction machine. This traction machine 2 is provided in the shaft
of the elevator. A sheave (not shown) is provided in this traction machine 2. A main
rope 3 is wound on this sheave like a well bucket. A car 4 and a counterweight 5 are
connected to both ends of this main rope 3. The car 4 and the counterweight 5 are
arranged within the shaft. And the car 4 and the counterweight 5 have the function
of running in the reverse directions due to the rotary driving of the traction machine
2.
[0013] And the traction machine 2 is provided with a rotation detector 6. This rotation
detector 6 comprises an encoder, a resolver and the like. This rotation detector 6
has the function of detecting the rotation speed of the traction machine 2. Furthermore,
the traction machine 2 is provided with a brake device 7. This brake device 7 is provided
with a brake coil 8. This brake device 7 has the function of generating a braking
force for the rotation of the traction machine 2 because of the de-energization of
the brake coil 8. In addition, the brake device 7 has the function of releasing the
braking force to the rotation of the traction machine 2 because of the energization
of the brake coil 8.
[0014] And a car door 9 is provided at the entrance of the car 4. A car door switch 10 is
provided in a position corresponding to the car door 9. This car door switch 10 has
the function of detecting the open and closed condition of the car door 9. In contrast
to this, each hall is provided with a hall door 11. Hall door switches 12 are provided
in positions corresponding to these hall doors 11. These hall door switches 12 have
the function of detecting the open and closed condition of the hall door 11. And a
door zone sensor 13 is provided in the upper part of the car 4. These door zone sensors
13 have the function of detecting that the car 4 is in a position in which the car
4 is capable of opening the door.
[0015] And a control panel 14 is provided between the commercial power source 1 and the
traction machine 2. This control panel 14 is provided with a power converter 15, a
main circuit relay 16, a brake relay 17, a first control section 18, and a first input/output
section 19. The power converter 15 is provided between the commercial power source
1 and the traction machine 2. This power converter 15 has the function of converting
the power inputted from the commercial power source 1 and outputting the converted
power to the traction machine 2. The main circuit relay 16 is provided between the
commercial power source 1 and the power converter 15. This main circuit relay 16 has
the function of keeping and cutting off power supply from the commercial power source
1 to the power converter 15. The first control section 18 has the function of performing
various kinds of arithmetic processing for performing the elevator operation control.
[0016] The first input/output section 19 has the function for the input of detection signals
of the rotation detector 6, the car door switch 10, the hall door switch 12, and the
door zone sensor 13. And the first input/output section 19 has the function of outputting
each kind of detection signal to the first control section 18. Furthermore, the first
input/output section 19 has the functions of outputting command signals to the power
converter 15, the main circuit relay 16, and the brake relay 17 on the basis of the
calculation result of the first control section 18 and of controlling the current
flowing in the brake coil 8.
[0017] Incidentally, in recent years there has been a movement afoot to make it obligatory
to protect users from a run with door open in which the car 4 runs, with the car door
9 and the hall door 11 kept open. Therefore, in this embodiment, the configuration
is such that the function of protection during a run with door open can be easily
added. A description will be given below of a configuration for adding the function
of protection during a run with door open.
[0018] Figure 2 is a general block diagram to explain the case where the function of protection
during a run with door open is added to the elevator apparatus of Figure 1.
[0019] In the case where the function of protection during a run with door open is added
to the elevator apparatus, as shown in Figure 2, a second control section 20 and a
second input/output section 21 are detachably attached to the control panel 14. The
second control section 20 has the function of performing various kinds of arithmetic
processing for controlling the brake device 7 during the detection of an abnormality.
[0020] As with the first input/output section 19, the second input/output section 21 has
the function for the input of detection signals of the rotation detector 6, the car
door switch 10, the hall door switch 12, and the door zone sensor 13. And the second
input/output section 21 has the function of outputting each kind of detection signal
to the second control section 20 and the first input/output section 19.
[0021] In as elevator apparatus of such a configuration, in normal times, the calculation
result of the first control section 18 is inputted to the second input/output section
21 via the first input/output section 19. And on the basis of the calculation result
of the first control section 18, the second input/output section 21 outputs command
signals to the power converter 15, the main circuit relay 16, and the brake relay
17, and controls the current flowing in the brake coil 8.
[0022] On the other hand, when the second control section 20 has detected a run with door
open on the basis of the actions of the door switches 10, 12 and the door zone sensor
13, the second input/output section 21 prioritizes the calculation result of the second
control section 20 to the calculation result of the first control section 18 on its
own determination. That is, when a run with door open has been detected, on the basis
of the calculation result of the second control section 20, the second input/output
section 21 outputs command signals to the power converter 15, the main circuit relay
16, and the brake relay 17, and controls the current flowing in the brake coil 8.
As a result of this, the car 4 keeps the stop condition after a sudden stop.
[0023] Next, a more detailed description will be given of the configuration for adding the
function of protection during a run with door open.
[0024] Figure 3 is a circuit configuration diagram of the inside of a control panel before
the addition of the function of protection during a run with door open to the elevator
apparatus in Embodiment 1 of the present invention. Figure 4 is a circuit configuration
diagram of the inside of a control panel after the addition of the function of protection
during a run with the door open to the elevator apparatus in Embodiment 1 of the present
invention.
[0025] As shown in Figure 3, the first control section 18 is connected to the first input/output
section 19 via a bus 22. This first control section 18 is provided with a flash ROM
23, a CPU 24, and a RAM 25. The flash ROM 23 is such that the contents thereof are
kept even when the power source is cut off. This flash ROM 23 stores a program for
the operation control of the elevator. The flash ROM 23 also has the function of keeping
abnormal signals. The CPU 24 has the function of performing the operation control
calculation of the elevator on the basis of program listed in flash ROM23. The RAM25
has the function of storing various variables which appear in the calculation process
of the CPU 24.
[0026] On the other hand, the first input/output section 19 is provided with an input port
26 and an output port 27. Usually, the input port 26 comprises a resistor, a photocoupler
and the like. This input port 26 has the function of capturing signals from the outside.
Specifically, detection signals from the rotation detector 6, the door switches 10,
12, the door zone sensor 13, and the contact of main circuit relay 16 are inputted
to the input port 26.
[0027] Furthermore, signals from a safety circuit 28 which goes into action in response
to the action of a safety device which detects an abnormality of the elevator are
inputted to the input port 26. In addition, other input signals 29 necessary for the
operation control of the elevator are also inputted to the input port 26. Incidentally,
the input port 26 has a margin in the number of ports. For this reason, it is ensured
that the second input/output section 21 can be connected to the input port 26.
[0028] Usually, the output port 27 comprises a semiconductor switch and the like. This output
port 27 has the function of outputting command signals to external equipment. Specifically,
the output port 27 outputs command signals to the brake coil 8, the main circuit relay
16, and the brake relay 17. And the output port 27 also outputs other output signals
30 necessary for the operation control of the elevator. Incidentally, the output port
27 has a margin in the number of ports. For this reason, it is ensured that the second
input/output section 21 can be connected to the output port 27.
[0029] And in the case where the function of protection during a run with door open is added,
as shown in Figure 4, the second control section 20 and the second input/output section
21 are later attached. The second control section 20 and the second input/output section
21 are connected via another bus 31 which is different form the bus 22. As with the
first control section 18, the second control section 20 is provided with a flash ROM
34, a CPU 35, end a RAM 36.
[0030] As with the first input/output section 19, the second input/output section 21 is
provided with an input port 35 and an output port 36. The rotation detector 6, the
door switches 10, 12, the door zone sensor 13, the contact of main circuit relay 16,
and the safety circuit 28, which were connected to the input port 26 of the first
input/output section 19, are connected to the input port 35. And the input port 35
is also connected to the output port 27 of the first input/output section 19. The
brake coil 8, the main circuit relay 16, and the brake relay 17, which were connected
to the output port 27 of the first input/output section 19, are connected to the output
port 36. And the output port 36 is also connected to the input port 26 of the first
input/output section 19.
[0031] Next, a description will be given of the actions of the elevator apparatus to which
the function of protection during a run with door open is added.
[0032] Figure 5 is a flowchart to explain the action of protection of the elevator apparatus
during a run with the door open in Embodiment 1 of the present invention.
[0033] The processing for the protection during a run with door open is periodically called
within the second control section 20. Specifically, first, in Step S1 a determination
is made as to whether or not the elevator is in a closed-door condition on the basis
of the actions of the door switches 10, 12. When the elevator is in a closed-door
condition, the processing at that period is finished.
[0034] In contrast to this, when the elevator is in an open-door condition, the flow of
processing proceeds to Step S2. In Step S2, a determination is made as to whether
or not the car 4 is present outside the door zone on the basis of the action of the
door zone sensor 13. When the car is present inside the door zone, the processing
at that period is finished. In contrast to this, when the car 4 is present outside
the door zone, the flow of processing proceeds to Step S3.
[0035] In. Step S3, a determination is made as to whether or not the car 4 has escaped from
within the door zone on the basis of a change in the action condition of the door
zone sensor 13. When the car 4 has escaped from the door zone, it is determined that
a run with door open has occurred, and the flow of processing proceeds to Step S4.
In Step S4, the second control section 20 outputs an OFF command to the main circuit
relay 16, and the flow of processing proceeds to Step S5. In Step S5, the second control
section 20 outputs an OFF command to the brake relay 17, and the flow of processing
proceeds to Step S6. In Step S6, a detection flag of a run with door open is stored
in the flash ROM 32, and the action at that period is finished.
[0036] On the other hand, when in Step S3 the escape of the car 4 from within the door zone
is not detected, it is determined that the door has become open during the run, and
the flow of processing proceeds to Step S7. In Step S7, the second control section
20 outputs an OFF command to the main circuit relay 16, and the flow of processing
proceeds to Step S8. In Step S8, the second control section 20 outputs an OFF command
to the brake relay 17, and the action at that period is finished.
[0037] According to Embodiment 1 described above, the second input/output section 21 and
the second control section 20 are detachably attached to the control panel 14. And
during a run with door open, the second control section 20 controls the brake device
7 in place of the first control section 18. For this reason, it is possible to add
the function of controlling the brake device 7 during a run with door open to an ordinary
elevator by a simple method. As a result of this, it is possible to ensure the sharing
of the platform of the control panel 14 with a minimum change in the equipment configuration.
[0038] Specifically, the second control section 20 controls the brake device 7 so that the
car 4 keeps the stop condition after a sudden stop. That is, the circuit configuration
within the control panel 14 functions as a latch circuit in order to prevent the brake
device 7 from going into action until release is performed by maintenance personnel.
Because of this, the safety of the elevator passengers can be ensured.
[0039] Incidentally, in Embodiment 1, the configuration is such that external signals are
inputted to the first input/output section 19 via the second input/output section
21. However, it is possible to adopt a configuration in which the wiring is branched
and external signals are inputted to the first input/output section 19 and the second
input/output section 21.
Embodiment 2
[0040] Figure 6 is a timing chart to explain the normal-time control condition of a brake
device used in the elevator apparatus in Embodiment 2 of the present invention. Figure
7 is a timing chart to explain the abnormal-time control condition of a brake device
used in the elevator apparatus in Embodiment 2 of the present invention. Incidentally,
parts which are the same as in Embodiment 1 or corresponding parts bear like numerals
and descriptions of these parts are omitted.
[0041] In Embodiment 1, the configuration is such that the action of protection during a
run with door open is performed by adding the second input/output section 21 and the
second control section 20. On the other hand, in Embodiment 2, the configuration is
such that the car 4 goes into action with a prescribed deceleration by adding the
second input/output section 22 and the second control section 20.
[0042] First, an outline of the control condition of the brake device 7 in normal times
will be given with the aid of Figure 6.
[0043] In Figure 6, reference numeral 37 denotes the speed of the car 4. This speed 37 of
the car 4 is obtained from the rotation detector 6. Reference numeral 38 denotes the
acceleration of the car 4. This acceleration 38 of the car 4 is calculated from a
change in the speed 37 of the car 4. Reference numeral 39 denotes the action condition
of a semiconductor switch. This action condition 39 relates to a semiconductor switch
of the output port 36 used in power supply to the brake coil 8. Reference numeral
40 denotes the action condition of the brake relay 17.
[0044] At the start of the elevator, the first control section 18 outputs commands for the
action of the brake relay 17 and for brake suction via the first input/output section
19. As a result of this, at a time t0, the action condition 39 of the semiconductor
switch and
the action condition 40 of the brake relay 17 become an ON condition. That is, a current
flows in the brake coil 8. As a result of this, the brake coil 8 is energized and
the brake device 7 releases the braking force.
[0045] And after the release of the braking force of the brake device 7, the elevator performs
an ordinary run. During an ordinary run, the speed 37 of the car 4 is not more than
the threshold value VLIM which is set beforehand. And also the acceleration 38 of
the car 4 is not more than the threshold value αL which is set beforehand. Under these
conditions, the action condition 39 of the semiconductor switch and the action condition
40 of the brake relay 17 maintain the ON condition until the start of the elevator
is released. Incidentally, in actuality, current control is performed so that a current
of a prescribed value flows in the brake coil 8. For this reason, the action condition
39 of the semiconductor switch is controlled so as to repeat the ON condition and
the OFF condition.
[0046] Next, an outline of the control condition of the brake device 7 in abnormal times
will be given with the aid of Figure 7.
[0047] As shown in Figure 7, when at a time t1 an abnormality of the elevator is detected,
the car 4 is about to stop suddenly because of the action of the safety device and
the like. And at the same time with this, the main circuit relay 16 switches from
the condition of keeping power supply to the traction machine 2 to the condition of
cutoff. At this time, the torque of the traction machine 2 becomes 0 instantaneously.
This results in an imbalanced condition of the car 4 and the counterweight 5. The
speed 37 of the car 4 increases due to this imbalanced condition.
[0048] And when the detection signals of the safety circuit 28 and the main circuit relay
16 are inputted to the second input/output section 21, the second control section
20 brings the action condition 39 of the semiconductor switch into the OFF condition.
As a result of this, the brake device 7 causes the braking force for the traction
machine 2 to be generated, Because of this braking force, at a time t2, the acceleration
38 of the car 4 becomes not more than the threshold value αL. Under these conditions,
the second control section 20 brings the action condition 39 of the semiconductor
switch into the repeated ON/OFF condition so that the deceleration of the car 4 obtains
a prescribed value. And at a time t4, the speed 37 of the car 4 becomes 0. At this
time, the second control section 20 brings the action condition 40 of the brake relay
17 into the OFF condition, and the deceleration control is finished.
[0049] Next, a more detailed description will be given of a concrete control procedure of
the brake device 7 by the second control section 20 with the aid of Figure 8.
[0050] Figure 8 is a flowchart to explain the control procedure of the brake device by the
second control section of the elevator apparatus in Embodiment 2 of the present invention.
[0051] This processing is periodically called within the second control section 20. Specifically,
first, an elevator start command is outputted from the first control section 18. And
in Step S11, a determination is made as to whether or not a command for brake suction
has been inputted to the second input/output section 21 via the first input/output
section 19.
[0052] When a command for brake suction has been inputted to the second input/output section
21, the flow of processing proceeds to Step S 12. In Step S 12, current control is
performed so as to output a switching pattern in which the current flowing in the
brake coil 8 obtains an appropriate value to the semiconductor switch. After that,
the flow of processing proceeds to Step S 13, where the semiconductor switch performs
an ON/OFF action on the basis of the above-described switching pattern and the processing
at that period is finished.
[0053] In contrast to this, when a command for brake suction is not inputted to the second
input/output section 21 in Step 11, the flow of processing proceeds to Step S14. In
Step S14, a determination is made as to whether or not the acceleration of the car
4 is not more than the threshold value α. When the acceleration of the car 4 is not
more than the threshold value αL, it is determined that the deceleration of the car
4 is excessive. In this case, the flow of processing proceeds to Step S15, where deceleration
control is performed so that the deceleration of the car 4 becomes constant. After
that, the flow of processing proceeds to Step S13, where the semiconductor switch
performs an ON/OFF action on the basis of the switching pattern by the above-described
deceleration control, and the processing at that period is finished. On the other
hand, the acceleration of the car 4 is larger than the threshold value αL in Step
S14, the flow of processing proceeds to Step S16. In Step S 16, the semiconductor
switch is brought into the OFF condition, and the processing at that period is finished.
[0054] Next, with the aid of Figure 9, a description will be given of the case where the
deceleration control of the car 4 is performed by the second control section 20.
[0055] Figure 9 is a flowchart to explain the car deceleration reducing control by the second
control section of the elevator apparatus in Embodiment 2 of the present invention.
[0056] This processing is periodically called within the second control section 20. Specifically,
at Step S21 a determination is made as to whether or not the speed of the car 4 is
0. When the speed of the car 4 is 0, the flow of processing proceeds to Step S22.
In Step S22, timer rest and the initialization of speed limit values are performed
as the initialization processing of variables. Specifically, the timer count t is
returned to 0. And the limit speed value is returned from VMAX to VLIM.
[0057] After that, the flow of processing proceeds to Step S23, where a determination is
made as to whether or not there is a command for brake suction. When there is a command
for brake suction, the flow of processing proceeds to Step S24. In Step S24, the brake
relay 17 is brought into the ON condition, and the processing at that period is finished.
In contrast to this, when there is no command for brake suction in Step S23, the flow
of processing proceeds to Step S25. In Step S25, the brake relay 17 is brought into
the OFF condition, and the action is finished.
[0058] On the other hand, when at Step S21 the speed of the car 4 is not 0, the flow of
processing proceeds to Step S26. In Step S26, a determination is made as to whether
or not the detected condition of the door switches 10, 12 is the open-door condition
and the detected condition of the door zone sensor 13 is the condition outside the
door zone. In the case of the open-door condition and the condition outside the door
zone, the flow of processing proceeds to Step S25, where the brake relay 17 is brought
into the OFF condition and thereafter the processing at that period is finished.
[0059] In contrast to this, the case of the closed-door condition or the condition inside
the door zone, the flow of processing proceeds to Step S27. In Step S27, a determination
is made as to whether or not the absolute value of the speed of the car 4 is smaller
than VLIM. When the absolute value of the speed of the car 4 is not less than VLIM,
the speed of the car 4 is determined to be excessive. In this case, the flow of processing
proceeds to Step S25, where the brake relay 17 is brought into the OFF condition and
thereafter the processing at that period is finished.
[0060] In contrast to this, the absolute value of the speed of the car 4 is smaller than
VLIM, the flow of processing proceeds to Step S28. In Step S28 a determination is
made as to whether or not the timer count t is 0. When the timer count t is 0, the
flow of processing proceeds to Step S29. In Step S29, a determination is made as to
whether or not the acceleration of the car 4 is larger than the threshold value αL.
[0061] When the acceleration of the car 4 is larger than the threshold value αL, it is determined
that the car 4 is during a normal run or during a sudden stop with a small deceleration.
In this case, the flow of processing proceeds to Step S30, where the brake relay 17
is brought into the ON condition and the processing at that period is finished. On
the other hand, when in Step S29 the acceleration of the car 4 is not more than the
threshold value αL, the flow of processing proceeds to Step S31. In Step S31, the
timer count t is incremented. After that, the flow of processing proceeds to Step
S30, where the brake relay 17 is brought into the ON condition to perform deceleration
control and the processing at that period is finished.
[0062] When in Step S28 the timer count t is not 0, the flow of processing proceeds to Step
S32. In Step S32, a determination is made as to whether or not the timer count t is
larger than a prescribed time tmax. When the timer count t is not more than a prescribed
time tmax, it is recognized that there is a wasteful time until the generation of
the braking force in the brake device 7. In this case, after the increment of the
timer count t in Step S31, in Step S30 the brake relay 17 is brought into the ON condition
to perform deceleration control and the processing at that period is finished.
[0063] In contrast to this, when in Step S32 the timer count t is larger than a prescribed
time tmax, it is determined that the car 4 is in the deceleration-controlled condition.
In this case, the flow of processing proceeds to Step S33, where a value obtained
by subtracting V1, which corresponds to one period, from the limited speed value VLIM
is regarded as a new limited speed value VLIM. After that, the flow of processing
proceeds to Step S30, where the brake relay 17 is brought into the ON condition to
perform deceleration control and the processing at that period is finished.
[0064] According to Embodiment 2 described above, when the safety circuit 28 is about to
stop the car 4 suddenly, the second control section 20 controls the brake device 7
in place of the first control section 18 so that the deceleration of the car 4 becomes
a prescribed deceleration. Furthermore, when the main circuit relay 16 has switched
from the condition of keeping power supply to the traction machine 2 to the condition
of cutoff, the second control section 20 controls the brake device 7 in place of the
first control section 18 so that the deceleration of the car 4 becomes a prescribed
deceleration. For this reason, it is possible to add the function of deceleration
control to a usual elevator by a simple method. As a result of this, it is possible
to ensure the sharing of the platform of the control panel 14 with a minimum change
in the equipment configuration.
[0065] Incidentally, the present invention is not limited to Embodiments 1 and 2 and it
is possible to obtain the same effect by adopting a configuration in which the brake
device 7 is controlled by the second control section 20 during the detection of an
abnormality. Specifically, the configuration is such that a detection section which
detects an abnormality of the elevator is detachably provided in the control panel
14 and the brake device 7 is controlled by the second control section 20 in place
of the first control section 18 during the detection of an abnormality by the detection
section.
Industrial Applicability
[0066] As described above, the elevator apparatus of the present invention can be used in
an elevator having a control panel which controls a brake device.
Description of symbols
[0067]
1 commercial power source, 2 traction machine, 3 main rope,
4 car, 5 counterweight, 6 rotation detector, 7 brake device,
8 brake coil, 9 car door, 10 car door switch, 11 hall door,
12 hall door switch, 13 door zone sensor, 14 control panel,
15 power converter, 16 main circuit relay, 17 brake relay,
18 first control section, 19 first input/output section,
20 second control section, 21 second input/output section,
22 bus, 23 flash ROM, 24 CPU, 25 RAM, 26 input port,
27 output port, 28 safety circuit, 29 other input signals,
30 other output signals, 31 bus, 32 flash ROM, 33 CPU,
34 RAM, 35 input port, 36 output port, 37 speed of car,
38 acceleration of car, 39 action condition of semiconductor switch,
40 action condition of brake relay.