WO2011061819A1

WO2011061819A1 - Elevator device

Info

Publication number: WO2011061819A1
Application number: PCT/JP2009/069540
Authority: WO
Inventors: 柴田　益誠
Original assignee: 三菱電機株式会社
Priority date: 2009-11-18
Filing date: 2009-11-18
Publication date: 2011-05-26
Also published as: KR20120054043A; EP2502869A4; EP2502869A1; KR101354728B1; CN102596778B; CN102596778A; EP2502869B1; JP5360225B2; JPWO2011061819A1

Abstract

Provided is an elevator device which achieves the simplification of a configuration for adding a function of controlling a brake unit when abnormality is detected and the sharing of a platform of a control board. Specifically, an elevator device is provided with a first control unit which is provided on a control board of an elevator and controls a brake unit for braking a hoisting machine for causing a car disposed in a hoistway of the elevator to travel, a detection unit which is detachably provided on the control board and detects the abnormality of the elevator, and a second control unit which is detachably provided on the control board and controls the brake unit in place of the first control unit when the abnormality is detected by the detection unit.

Description

Elevator equipment

The present invention relates to an elevator apparatus having a control panel for controlling a brake device.

In a conventional elevator device, when an abnormality is detected, the braking force of the brake device is controlled based on the deceleration command value and the speed signal so that the deceleration of the car becomes a predetermined value (see, for example, Patent Document 1). In the device described in Patent Document 1, both the operation at the time of basic abnormality detection and the control of the braking force are performed by one braking force control unit. For this reason, if the deceleration of the car becomes excessive due to a failure of the braking force control unit, the burden on the passenger increases. Further, if the car deceleration becomes too small, the braking distance becomes long, and the car contacts the bottom or top of the hoistway.

Therefore, an elevator apparatus that operates a rope gripper when an abnormality is detected to stop the elevator has been proposed (for example, see Patent Document 2). However, in machine room-less elevators that have become mainstream in recent years, it is difficult to secure an installation space for a rope gripper.

On the other hand, when the braking device is operated when the abnormality is detected, the first brake means for emergency stopping the car, and the deceleration of the car exceeds a predetermined value during the emergency braking operation by the first brake control means, the braking device The thing provided with the 2nd brake control means to reduce braking force is proposed (for example, refer to patent documents 3). According to such a configuration, the above problem is solved.

Japanese Unexamined Patent Publication No. 07-157211 Japanese Unexamined Patent Publication No. 2007-55691 International Publication No. 2008/012896

However, in the thing of patent document 3, it is necessary to comprise so that a 2nd brake control apparatus may operate | move only when the deceleration of a cage | basket becomes more than predetermined value at the time of the emergency braking operation | movement by a 1st brake control means. is there. For this reason, there is a problem that the configuration becomes complicated and it is difficult to make the platform of the control panel common.

The present invention has been made to solve the above-described problems, and its object is to simplify a configuration for adding a function of controlling a brake device when an abnormality is detected, and to share a platform of a control panel. It is providing the elevator apparatus which can do.

An elevator apparatus according to the present invention is provided on a control panel of an elevator, and includes a first control unit that controls a brake device that brakes a hoisting machine that travels a car disposed in a hoistway of the elevator, and the control A detector that is detachably provided on the panel and detects the abnormality of the elevator, and is detachably provided on the control panel, and the brake device replaces the first controller when the abnormality is detected by the detector. And a second control unit for controlling.

According to the present invention, it is possible to simplify the configuration for adding the function of controlling the brake device when an abnormality is detected, and to make the platform of the control panel common.

1 is a basic configuration diagram of an elevator apparatus according to Embodiment 1 of the present invention. It is a whole block diagram for demonstrating the case where the door opening travel protection function is added to the elevator apparatus of FIG. It is a circuit block diagram in the control panel before adding a door open travel protection function to the elevator apparatus in Embodiment 1 of this invention. It is a circuit block diagram in the control panel after adding the door open travel protection function to the elevator apparatus in Embodiment 1 of this invention. It is a flowchart for demonstrating the door open travel protection operation | movement of the elevator apparatus in Embodiment 1 of this invention. It is a timing chart for demonstrating the control state in the normal time of the brake device utilized for the elevator apparatus in Embodiment 2 of this invention. It is a timing chart for demonstrating the control state at the time of abnormality of the brake device utilized for the elevator apparatus in Embodiment 2 of this invention. It is a flowchart for demonstrating the control procedure of the brake device by the 2nd control part of the elevator apparatus in Embodiment 2 of this invention. It is a flowchart for demonstrating the deceleration reduction control of the car by the 2nd control part of the elevator apparatus in Embodiment 2 of this invention.

DETAILED DESCRIPTION Embodiments for carrying out the present invention will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
FIG. 1 is a basic configuration diagram of an elevator apparatus according to Embodiment 1 of the present invention.
In FIG. 1, 1 is a commercial power source. The commercial power source 1 is provided in a building where an elevator is installed. 2 is a hoisting machine. The hoisting machine 2 is provided in an elevator hoistway. The hoisting machine 2 is provided with a sheave (not shown). The main rope 3 is wound around the sheave in a sword type. A car 4 and a counterweight 5 are connected to both ends of the main rope 3. The car 4 and the counterweight 5 are disposed within the lift. The car 4 and the counterweight 5 have a function of traveling in opposite directions by the rotational drive of the hoisting machine 4.

Further, the hoisting machine 2 is provided with a rotation detector 6. The rotation detector 6 includes an encoder, a resolver, and the like. The rotation detector 6 has a function of detecting the rotation speed of the hoisting machine 2. The hoisting machine 2 is provided with a brake device 7. The brake device 7 includes a brake coil 8. The brake device 7 has a function of generating a braking force with respect to the rotation of the hoist 2 when the brake coil 8 is deenergized. Further, the brake device 7 has a function of releasing the braking force against the rotation of the hoist 2 when the brake coil 8 is energized.

In addition, a car door 9 is provided at the entrance of the car 4. Corresponding to this car door 9, a car door switch 10 is provided. The car door switch 10 has a function of detecting the open / closed state of the car door 9. On the other hand, a landing door 11 is provided at each landing. Corresponding to these landing doors 11, a landing door switch 12 is provided. These landing door switches 12 have a function of detecting the open / closed state of the landing doors 11. In addition, a door zone sensor 13 is provided on the upper portion of the car 4. These door zone sensors 13 have a function of detecting that the car 4 is in a position where it can be opened.

Further, a control panel 14 is provided between the commercial power source 1 and the hoisting machine 2. The control panel 14 includes a power converter 15, a main circuit relay 16, a brake relay 17, a first control unit 18, and a first input / output unit 19. The power converter 15 is provided between the commercial power source 1 and the hoisting machine 2. The power converter 15 has a function of converting the power input from the commercial power source 1 and outputting it to the hoisting machine 2. The main circuit relay 16 is provided between the commercial power source 1 and the power converter 15. The main circuit relay 16 has a function of maintaining and shutting off power supply from the commercial power source 1 to the power converter 15. The 1st control part 18 is provided with the function to perform various arithmetic processing for performing operation control of an elevator.

The first input / output unit 19 has a function of inputting detection signals from the rotation detector 6, the car door switch 10, the landing door switch 12, and the door zone sensor 13. Further, the first input / output unit 19 has a function of outputting various detection signals to the first control unit 18. Further, the first input / output unit 19 outputs a command signal to the power converter 15, the main circuit relay 16, and the brake relay 17 based on the calculation result of the first control unit 18, and flows to the brake coil 8. A function for controlling current is provided.

By the way, in recent years, there has been a movement to obligate users to be protected from door-opening travel where the car 4 travels with the car door 9 and the landing door 11 open. Therefore, in this embodiment, the door opening travel protection function can be easily added. Hereinafter, the structure which adds a door open travel protection function is demonstrated.

FIG. 2 is an overall configuration diagram for explaining a case where a door opening travel protection function is added to the elevator apparatus of FIG.
When adding a door opening travel protection function to an elevator apparatus, as shown in FIG. 2, the 2nd control part 20 and the 2nd input / output part 21 are attached to the control panel 14 so that attachment or detachment is possible. The second controller 20 has a function of performing various arithmetic processes for controlling the brake device 7 when an abnormality is detected.

Similarly to the first input / output unit 19, the second input / output unit 21 receives detection signals from the rotation detector 6, the car door switch 10, the landing door switch 12, and the door zone sensor 13. It has a function to be performed. The second input / output unit 21 has a function of outputting various detection signals to the second control unit 20 and the first input / output unit 19.

In the elevator apparatus having such a configuration, the calculation result of the first control unit 18 is input to the second input / output unit 21 via the first input / output unit 19 in a normal state. The second input / output unit 21 outputs a command signal to the power converter 15, the main circuit relay 16, and the brake relay 17 based on the calculation result of the first control unit 18, and flows to the brake coil 8. Control the current.

On the other hand, when the second control unit 20 detects the opening of the door based on the operation of the door switches 10 and 12 and the door zone sensor 13, the second input / output unit 21 determines the first The calculation result of the second control unit 20 is prioritized over the calculation result of the control unit 18. That is, when door-open running is detected, the second input / output unit 21 sends a command signal to the power converter 15, the main circuit relay 16, and the brake relay 17 based on the calculation result of the second control unit 20. While outputting, the electric current which flows into the brake coil 8 is controlled. Thereby, the car 4 maintains the stop state after the sudden stop.

Next, the structure which adds a door open travel protection function is demonstrated in detail.
FIG. 3 is a circuit configuration diagram in the control panel before the door-opening travel protection function is added to the elevator apparatus according to Embodiment 1 of the present invention. FIG. 4 is a circuit configuration diagram in the control panel after adding the door-opening travel protection function to the elevator apparatus according to Embodiment 1 of the present invention.

As shown in FIG. 3, the first control unit 18 is connected to the first input / output unit 19 via a bus 22. The first control unit 18 includes a flash ROM 23, a CPU 24, and a RAM 25. The flash ROM 23 retains its contents even when the power is turned off. The flash ROM 23 stores an elevator operation control program. The flash ROM 23 also has a function of holding an abnormal signal. The CPU 24 has a function of performing an elevator operation control calculation based on a program described in the flash ROM 23. The RAM 25 has a function of storing various variables that appear in the calculation process of the CPU 24.

On the other hand, the first input / output unit 19 includes an input port 26 and an output port 27. The input port 26 is usually composed of a resistor, a photocoupler, or the like. The input port 26 has a function of taking in a signal from the outside. Specifically, detection signals from the contacts of the rotation detector 6, the door switches 10 and 12, the door zone sensor 13, and the main circuit relay 16 are input to the input port 26.

Furthermore, a signal from the safety circuit 28 that operates in response to the operation of the safety device that detects the abnormality of the elevator is also input to the input port 26. In addition, other input signals 29 necessary for controlling the operation of the elevator are also input to the input port 26. The input port 26 has a sufficient number of ports. For this reason, the second input / output unit 21 can be connected to the input port 26.

The output port 27 is usually composed of a semiconductor switch or the like. The output port 27 has a function of outputting a command signal to an external device. Specifically, the output port 27 outputs a command signal to the brake coil 8, the main circuit relay 16, and the brake relay 17. The output port 27 also outputs other output signals 30 necessary for controlling the operation of the elevator. The output port 27 has a sufficient number of ports. For this reason, the second input / output unit 21 can be connected to the output port 27.

And when adding a door opening travel protection function, as shown in FIG. 4, the 2nd control part 20 and the 2nd input / output part 21 are attached later. The second control unit 20 and the second input / output unit 21 are connected via a bus 31 different from the bus 22. Similar to the first control unit 18, the second control unit 20 includes a flash ROM 32, a CPU 33, and a RAM 34.

The second input / output unit 21 includes an input port 35 and an output port 36 in the same manner as the first input / output unit 19. The rotation detector 6, the door switches 10 and 12, the door zone sensor 13, the contacts of the main circuit relay 16, and the safety circuit 28 connected to the input port 26 of the first input / output unit 19 are connected to the input port 35. Is done. The input port 35 is also connected to the output port 27 of the first input / output unit 19. The brake coil 8, the main circuit relay 16, and the brake relay 17 that are connected to the output port 27 of the first input / output unit 19 are connected to the output port 27. The output port 36 is also connected to the input port 26 of the first input / output unit 19.

Next, the operation of the elevator apparatus to which the door opening traveling protection function is added will be described.
FIG. 5 is a flowchart for explaining the door-opening travel protection operation of the elevator apparatus according to Embodiment 1 of the present invention.
The door-opening travel protection process is called periodically in the second control unit 20. Specifically, first, in step S1, it is determined based on the operation of the door switches 10 and 12 whether or not the elevator is in a door-closed state. When the elevator is in the door-closed state, the process in that cycle ends.

On the other hand, when the elevator is in the door open state, the process proceeds to step S2. In step S2, based on the operation of the door zone sensor 13, it is determined whether or not the car 4 is positioned outside the door zone. When the car 4 is located in the door zone, the processing in that cycle ends. On the other hand, if the car 4 is located outside the door zone, the process proceeds to step S3.

In step S3, based on the change in the operation state of the door zone sensor 13, it is determined whether or not the car 4 has escaped from the door zone. When the car 4 escapes from the door zone, it is determined that the door-opening has occurred, and the process proceeds to step S4. In step S4, the second control unit 20 outputs an OFF command to the main circuit relay 16, and the process proceeds to step S5. In step S5, the second control unit 20 outputs an OFF command to the brake relay 17, and the process proceeds to step S6. In step S6, the detection flag for the door-opening travel is stored in the flash ROM 32, and the operation in that cycle ends.

On the other hand, if it is not detected in step S3 that the car 4 has escaped from the inside of the door zone, it is determined that the car has been opened during traveling, and the process proceeds to step S7. In step S7, the second control unit 20 outputs an OFF command to the main circuit relay 16, and the process proceeds to step S8. In step S8, the second control unit 20 outputs an OFF command to the brake relay 17, and the operation in that cycle ends.

According to the first embodiment described above, the second input / output unit 21 and the second control unit 20 are detachably provided on the control panel 14. When the door is open, the second control unit 20 controls the brake device 7 instead of the first control unit 18. For this reason, the function which controls the brake device 7 at the time of door opening driving | running | working can be added to a normal elevator by an easy method. Thereby, the change of an apparatus structure can be minimized and the platform of the control panel 14 can be made common.

Specifically, the second control unit 20 controls the brake device 7 so that the car 4 maintains a stopped state after a sudden stop. That is, the circuit configuration in the control panel 4 functions as a latch circuit that does not operate the brake device 7 until the release by the maintenance staff. For this reason, the safety of the elevator user can be ensured.

In the first embodiment, an external signal is input to the first input / output unit 19 via the second input / output unit 21. However, the wiring may be branched and an external signal may be input to the first input / output unit 19 and the second input / output unit 21.

Embodiment 2. FIG.
FIG. 6 is a timing chart for explaining a normal control state of the brake device used in the elevator apparatus according to Embodiment 2 of the present invention. FIG. 7 is a timing chart for illustrating a control state when the brake device used in the elevator apparatus according to Embodiment 2 of the present invention is abnormal. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent, and description is abbreviate | omitted.

In the first embodiment, the second input / output unit 21 and the second control unit 20 are added to perform the door-opening travel protection operation. On the other hand, in the second embodiment, the second input / output unit 21 and the second control unit 20 are added so that the car 4 operates at a predetermined deceleration.

First, the outline of the control state of the brake device 7 at the normal time will be described with reference to FIG.
In FIG. 6, 37 is the speed of the car 4. The speed 37 of the car 4 is obtained from the rotation detector 6. Reference numeral 38 denotes the acceleration of the car 4. The acceleration 39 of the car 4 is calculated from the change in the speed 37 of the car 4. Reference numeral 39 denotes an operating state of the semiconductor switch. This operating state 39 relates to the semiconductor switch of the output port 36 that supplies power to the brake coil 8. Reference numeral 40 denotes an operating state of the brake relay 17.

When starting the elevator, the first control unit 18 outputs the operation of the brake relay 17 and the brake suction command via the first input / output unit 19. Thereby, at time t0, the operation state 38 of the semiconductor switch and the operation state 40 of the brake relay 17 are turned on. That is, a current flows through the brake coil 8. As a result, the brake coil 8 is energized and the brake device 7 releases the braking force.

Then, after the braking force of the brake device 7 is released, the elevator travels normally. During normal running, the speed 37 of the car 4 is equal to or less than a preset threshold value VLIM. The acceleration 38 of the car 4 is also equal to or higher than a preset threshold value αL. Under this condition, the operating state 39 of the semiconductor switch and the operating state 40 of the brake relay 17 are kept on until the elevator is released. Actually, the current is controlled so that a predetermined current flows through the brake coil 8. For this reason, the operation state 39 of the semiconductor switch is controlled to repeat the ON state and the OFF state.

Next, the outline of the control state of the brake device 7 at the time of abnormality will be described with reference to FIG.
As shown in FIG. 7, when an elevator abnormality is detected at time t <b> 1, the car 4 tries to stop suddenly by the operation of a safety device or the like. At the same time, the main circuit relay 16 switches from a state in which power supply to the hoist 2 is maintained to a state in which the main circuit relay 16 is shut off. At this time, the torque of the hoisting machine 2 instantaneously becomes zero. For this reason, the car 4 and the counterweight 5 are in an unbalanced state. Due to this unbalanced state, the speed 37 of the car 4 increases.

Then, when detection signals from the safety circuit 28 and the main circuit relay 16 are input to the second input / output unit 21, the second control unit 20 turns the operation state 39 of the semiconductor switch to the OFF state. Thereby, the brake device 7 generates a braking force for the hoisting machine 2. With this braking force, the acceleration 38 of the car 4 becomes equal to or less than the threshold value αL at time t2. Under this condition, the second control unit 20 sets the operation state 39 of the semiconductor switch to the ON / OFF repetition state so that the deceleration of the car 4 becomes a predetermined value. Then, at time t4, the speed 37 of the car 4 becomes zero. At this time, the 2nd control part 20 makes the operation state 40 of the brake relay 17 an OFF state, and deceleration control is complete | finished.

Next, a specific control procedure of the brake device 7 by the second control unit 20 will be described in more detail with reference to FIG.
FIG. 8 is a flowchart for illustrating a control procedure of the brake device by the second control unit of the elevator apparatus according to Embodiment 2 of the present invention.
This process is periodically called in the second control unit 20. Specifically, first, an elevator start command is output from the first control unit 18. In step S <b> 11, it is determined whether a brake suction command is input to the second input / output unit 21 via the first input / output unit 19.

When the brake suction command is input to the second input / output unit 21, the process proceeds to step S12. In step S12, current control is performed so that a switching pattern is output to the semiconductor switch so that the current flowing through the brake coil 8 has an appropriate value. Thereafter, the process proceeds to step S13, where the semiconductor switch performs an ON / OFF operation based on the switching pattern, and the processing in that cycle ends.

On the other hand, if the brake suction command is not input to the second input / output unit 21 in step S11, the process proceeds to step S14. In step S14, it is determined whether or not the acceleration of the car 4 is equal to or less than a threshold value α. When the acceleration of the car 4 is equal to or less than the threshold value αL, it is determined that the deceleration of the car 4 is excessive. In this case, the process proceeds to step S15, and deceleration control is performed so that the deceleration of the car 4 is constant. Thereafter, the process proceeds to step S13, where the semiconductor switch performs an ON / OFF operation based on the switching pattern by the deceleration control, and the process in that cycle is completed. On the other hand, if the acceleration of the car 4 is greater than the threshold value αL in step S14, the process proceeds to step S16. In step S16, the semiconductor switch is turned off, and the processing in that cycle ends.

Next, the case where the deceleration control of the car 4 is performed by the second control unit 20 will be described with reference to FIG.
FIG. 9 is a flowchart for illustrating the deceleration reduction control of the car by the second control unit of the elevator apparatus according to Embodiment 2 of the present invention.
This process is periodically called in the second control unit 20. Specifically, first, in step S21, it is determined whether or not the speed of the car 4 is zero. If the speed of the car 4 is 0, the process proceeds to step S22. In step S22, timer initialization and speed limit value initialization are performed as variable initialization processing. Specifically, the timer count t is returned to zero. Also, the speed limit value is returned from VMAX to VLIM.

Thereafter, the process proceeds to step S23, where it is determined whether or not there is a brake suction command. If there is a brake suction command, the process proceeds to step S24. In step S24, the brake relay 17 is turned on, and the processing for that cycle ends. On the other hand, if there is no brake suction command in step S23, the process proceeds to step S25. In step S25, the brake relay 17 is turned off and the operation ends.

On the other hand, if the speed of the car 4 is not 0 in step S21, the process proceeds to step S26. In step S26, it is determined whether or not the detection state of the door switches 10 and 12 is the door open state and the detection state of the door zone sensor 13 is outside the door zone. If the door is open and outside the door zone, the process proceeds to step S25, where the brake relay 17 is turned off, and the processing in that cycle ends.

On the other hand, if the door is closed or in the door zone, the process proceeds to step S27. In step S27, it is determined whether or not the absolute value of the speed of the car 4 is smaller than VLIM. If the absolute value of the speed of the car 4 is greater than or equal to VLIM, it is determined that the speed of the car 4 is excessive. In this case, the process proceeds to step S25, and after the brake relay 17 is turned off, the processing in that cycle ends.

On the other hand, if the absolute value of the speed of the car 4 is smaller than VLIM, the process proceeds to step S28. In step S28, it is determined whether or not the timer count t is zero. If the timer count t is 0, the process proceeds to step S29. In step S29, it is determined whether or not the acceleration of the car 4 is greater than a threshold value αL.

When the acceleration of the car 4 is greater than the threshold value αL, it is determined that the vehicle is traveling normally or suddenly stops with a small deceleration. In this case, the process proceeds to step S30, the brake relay 17 is turned on, and the process in that cycle ends. On the other hand, if the acceleration of the car 4 is equal to or less than the threshold value αL in step S29, the process proceeds to step S31. In step S31, the timer count t is incremented. Thereafter, the process proceeds to step S30, where the brake relay 17 is turned on for deceleration control, and the processing in that cycle ends.

If the timer count t is not 0 in step S28, the process proceeds to step S32. In step S32, it is determined whether or not the timer count t is greater than a predetermined time tmax. When the timer count t is equal to or less than the predetermined time tmax, it is recognized that it is a dead time until the braking force is generated in the brake device 7. In this case, after incrementing the timer count t in step S31, the brake relay 17 is turned on for deceleration control in step S30, and the processing in that cycle ends.

On the other hand, if the timer count t is larger than the predetermined time tmax in step S32, it is determined that the deceleration control state is set. In this case, the process proceeds to step S33, and a value obtained by subtracting V1 for one cycle from the speed limit value VLIM is set as a new speed limit value VLIM. Thereafter, the process proceeds to step S30, where the brake relay 17 is turned on for deceleration control, and the processing in that cycle ends.

According to the second embodiment described above, the second controller 20 causes the deceleration of the car 4 to be a predetermined deceleration when the safety circuit 28 is about to stop the car 4 suddenly. The brake device 7 is controlled instead of the first control unit 18. Furthermore, the second control unit 20 causes the deceleration of the car 4 to be a predetermined deceleration when the main circuit relay 16 is switched from the state of supplying power to the hoisting machine 2 to the state of shutting off. The brake device 7 is controlled instead of the first control unit 18. For this reason, the deceleration control function can be added to a normal elevator by an easy method. Thereby, the change of an apparatus structure can be minimized and the platform of the control panel 14 can be made common.

The same effect can be obtained not only in the operations of the first and second embodiments but also in a configuration in which the brake device 7 is controlled by the second control unit 20 when an abnormality is detected. Specifically, a detection unit for detecting an abnormality of the elevator is detachably provided on the control panel 14, and the second control unit 20 replaces the first control unit 18 with the brake device 7 when the detection unit detects an abnormality. What is necessary is just to set it as the structure controlled.

As described above, the elevator device according to the present invention can be used for an elevator having a control panel for controlling a brake device.

1 commercial power supply, 2 hoisting machine, 3 main rope, 4 cage, 5 counterweight,
6 Rotation detector, 7 Brake device, 8 Brake coil, 9 Car door,
10 door switch for car door, 11 door for landing, 12 door switch for door for landing,
13 door zone sensor, 14 control panel, 15 power converter,
16 main circuit relay, 17 brake relay, 18 first control unit,
19 first input / output unit, 20 second control unit, 21 second input / output unit,
22 bus, 23 flash ROM, 24, CPU, 25 RAM,
26 input ports, 27 output ports, 28 safety circuits, 29 other input signals,
30 Other output signals, 31 Bus, 32 Flash ROM, 33 CPU,
34 RAM, 35 input ports, 36 output ports, 37 basket speed,
38 Car deceleration, 39 Operating state of semiconductor switch,
40 Operating state of brake relay

Claims

A first control unit that controls a brake device that is provided in an elevator control panel and brakes a hoisting machine that travels a car disposed in the elevator hoistway;
A detection unit that is detachably provided on the control panel and detects an abnormality of the elevator;
A second control unit that is detachably provided on the control panel, and controls the brake device instead of the first control unit when the abnormality is detected by the detection unit;
An elevator apparatus comprising:
The detection unit detects door-open travel in which the car travels while the door of the elevator is open based on the operation of a door zone sensor and a door switch.
The second control unit controls the brake device in place of the first control unit so as to maintain a stopped state after the car suddenly stops when the detection unit detects the door opening traveling. The elevator apparatus according to claim 1.
The detection unit detects the speed of the car and detects an operation of a safety device that suddenly stops the car when the abnormality occurs,
When the safety device is about to stop the car suddenly, the second control unit is configured so that a deceleration calculated from the speed of the car detected by the detection unit becomes a predetermined value. The elevator apparatus according to claim 1, wherein the brake apparatus is controlled instead of the one control unit.
A main circuit relay for maintaining and shutting off the power supply to the hoisting machine;
With
The detection unit detects the speed of the car and detects the operation of the front main circuit relay,
The second control unit is calculated from the speed of the car detected by the detection unit when the main circuit relay is switched from a state of maintaining the power supply to the hoisting machine to a state of blocking. The elevator apparatus according to claim 1, wherein the brake apparatus is controlled instead of the first control section so that the deceleration becomes a predetermined value.