JPH09208164A - Elevator door device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate maintenance work of an electric circuit provided with a condenser. SOLUTION: A controller for controlling an electric motor 1 for opening and closing a door through the output of a microcomputer is provided. An acoustic informing device 19 to be operated by voltage remaining of a condenser 15 for smoothing a power source when the power supply of a main power supply circuit 4 connected to a power circuit 3 of the controller is shut off is provided. The remaining voltage of the condenser 15 is informed by the acoustic informing device 19 when the power supply of the main power supply circuit 4 connected to the power circuit 3 of the controller is shut off. Accordingly, danger can be clearly informed even if there is illumination for maintenance work, the accident of electric shock caused by remaining voltage of the condenser can be prevented from occurring to an operator, and work is made easy and safe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator door device in which an electric motor for driving a door is controlled by a control device which operates via an output of a microcomputer.

[0002]

2. Description of the Related Art FIGS.
16 is a diagram showing a conventional elevator door device similar to the elevator door device shown in Japanese Patent No. 56992, FIG. 15 is a circuit diagram conceptually showing electrical connection, FIG.
Is a main power supply circuit diagram connected to the power circuit of FIG. 15, FIG.
7 is a flow chart for explaining the operation of the circuit of FIG. 15, and FIG. 18 is a graph showing the capacitance change of the capacitor provided in the main power supply circuit of FIG. In the figure, 1 is an electric motor for driving a door opening / closing mechanism (not shown), and 2 is an encoder, which is connected to the electric motor 1 and generates a pulse proportional to the rotation angle of the electric motor 1.

3 is a power circuit connected to the electric motor 1,
M connected to the main power supply circuit 4 composed of a DC power supply described later
It consists of OS-FET and converts direct current to alternating current. Reference numeral 5 denotes a microcomputer including a one-chip microcomputer, which includes a pulse count unit 51 connected to the encoder 2, a CPU 52, an input / output port 53, a PWM device 54 for generating a pulse width modulation signal, a RAM 55, an A / D converter 56, and It is composed of the ROM 57. The pulse counting unit 51 counts the input pulses from the encoder 2, and the input / output port 53 exchanges signals with the outside.

Reference numeral 6 is a gate signal generating circuit, one side of which is connected to the power circuit 3 and the other side of which is connected to the PWM device 54. 7 is a position switch connected to the input / output port 53, 71 is a fully open position signal, and 72 is a fully closed position signal. Reference numeral 8 is an elevator control panel connected to the input / output port 53, 81 is a door opening command signal, and 82 is a door closing command signal. Reference numeral 9 is a 5V monitoring circuit connected to the microcomputer 5, and detects the rise and fall of the 5V power source of the microcomputer 5 to generate a reset pulse. Reference numeral 10 is a control power supply connected to the 5V monitoring circuit 9.

Reference numeral 11 is a control device, which comprises a power circuit 3, a microcomputer 5, a gate signal generation circuit 6, a 5V monitoring circuit 9 and a control power supply 10. Also,
The main power supply circuit 4 is a machine room (not shown) of the elevator.
AC power supply 12 supplied from the vehicle, an inspection switch 13 provided at the top of an elevator car (not shown) for shutting off the power supply, and a rectifier circuit 1 composed of diodes.
4. A capacitor 15 for smoothing the power supply and absorbing regenerative energy during braking.

The output signal of the 5V monitoring circuit 9 is reset and input to the microcomputer 5 and also to the gate signal generating circuit 6 to generate a gate signal of the MOS-FET of the power circuit 3 from the gate signal generating circuit 6. .
Further, the AC power supply 12 is converted into DC by the rectifier circuit 14 and the smoothing capacitor 15, and converted into AC by the power circuit 3 and supplied to the electric motor 1. Then, the encoder 2 connected to the electric motor 1 generates a number of pulses proportional to the rotation angle of the electric motor 1, and the pulses are supplied to the pulse counting unit 51.

The conventional elevator door device is constructed as described above and operates according to the flow chart shown in FIG. That is, the program of this flowchart is stored in the ROM 57, the door opening / closing command is read from the elevator control panel 8 in step 101, and the process proceeds to step 102. If the door opening command signal 81 is found in step 102, the process proceeds to step 103 to read the data value of the pulse counting unit 51, and if the door closing command signal 82 is taken, the process proceeds to step 104.

Next, step 103 to step 10
5, the fully open position signal 71 and the fully closed position signal 72 are input from the position switch 7, the door position is calculated from the data value of the pulse counting unit 51, and the step 1
Proceed to 06. Thus, in step 106, the speed Vt of the electric motor 1 is calculated from the data value of the pulse counting unit 51. Then, the routine proceeds to step 107, where the speed command modes of acceleration, constant speed and deceleration are discriminated according to the position of the door, and the routine proceeds to step 108.

In step 108, the speed command value Vp corresponding to the position of the door is read from the ROM 57 and step 1
In step 09, the deviation between the speed command value Vp and the speed Vt is calculated. Next, in step 110, the phase compensation calculation is performed, and then in step 111, the speed command value Vp and the speed Vt are calculated.
The deviation K is multiplied by the gain K. Next, the routine proceeds to step 112, where the torque is limited by the position of the door, and at step 113 the PWM device 54 is supplied with the calculated value at step 111 and a PWM signal is issued.

Although detailed description is omitted in step 104, an operation corresponding to the door closing command is performed in accordance with the case of the door opening command. In addition, the PWM signal is output to the gate signal generation circuit 6 and the MOS-FE of the power circuit 3 is output.
Since the gate of T is PWM-controlled, the speed of the electric motor 1, that is, the speed of the door is controlled with high accuracy.

When the voltage of the control power supply 10 drops during the operation of the door, the 5V monitoring circuit 9 generates a reset pulse, the microcomputer 5 is stopped and the power circuit 3 is cut off. The capacitor 15 holds the voltage within a predetermined time after the AC power supply 12 is cut off.

[0012]

In the conventional elevator door apparatus as described above, the smoothing capacitor 15 of the main power supply circuit 4 plays an important role in the function of the elevator door apparatus. For this reason, when the capacity failure occurs due to deterioration or failure of the capacitor 15, a normal DC power supply cannot be obtained, the door cannot be opened or closed, and the control device 11 may be damaged.

Further, when a worker is placed on the car of an elevator to perform maintenance and inspection work by providing the condenser 15, even if the inspection switch 13 is opened and the power is cut off, the voltage is maintained for a predetermined time. Is held. Therefore, there is a risk that an electric shock may occur when a worker comes into contact with the condenser 15.

Further, although the condenser 15 is gradually extended in life as a product, it has not reached the required life for elevators. Also, condenser 15
Although the capacity decreases with the passage of time as shown in FIG. 18, it is not easy to judge deterioration of the capacitor 15 or find a failure. For this reason, the capacitor 15 is regularly replaced, but there is a problem that the capacitor 15 is replaced before the end of its life, or the capacitor 15 is deteriorated before the periodical replacement cycle and the door opening and closing is hindered. was there.

The present invention has been made in order to solve the above problems, and it is a first object of the present invention to obtain an elevator door device which facilitates maintenance work of an electric circuit provided with a capacitor. A second object is to obtain an elevator door device that automatically detects the state of the condenser.

[0016]

In an elevator door device according to the present invention, an electric motor for opening and closing a door, a control device for controlling the electric motor through the output of a microcomputer, and a power circuit for the control device are connected. In addition, when the main power supply circuit is shut off, an auditory alarm device that operates by remaining voltage of a capacitor provided for smoothing the power supply is provided.

Further, in the elevator door device according to the present invention, when the main power supply circuit connected to the power circuit of the control device is cut off by the operation of the inspection switch, the voltage of the capacitor provided for smoothing the power supply An audible alarm device is provided that operates by remaining.

Further, in the elevator door device according to the present invention, the electric motor for opening and closing the door, the control device for controlling the electric motor through the output of the microcomputer, and the main power supply circuit connected to the power circuit of the control device. And an insulating cap made of a transparent material for covering the terminals of the capacitor provided for smoothing the power source of the above.

Further, in the elevator door apparatus according to the present invention, the insulating cap having the through hole arranged facing the terminal of the capacitor is provided.

Further, in the elevator door device according to the present invention, the electric motor for opening and closing the door and the power circuit connected to the main power supply circuit are connected to control the electric motor through the output of the microcomputer. Detects the time required for the residual voltage of the capacitor provided for smoothing the power supply at the time of power shutdown to reach the reference voltage for determining the capacity decrease of the capacitor, and detects the capacity decrease when the time is shorter than the reference time. A controller for generating a signal is provided.

Further, in the elevator door apparatus according to the present invention, the power circuit is connected to the electric motor for opening and closing the door and the main power supply circuit having the condenser to control the electric motor through the output of the microcomputer. A control device that detects a rise time until the voltage of the power supply reaches a reference voltage for determining a rise in the power supply when the power supply circuit is turned on, and generates a capacitor capacitance decrease detection signal when the rise time is shorter than the reference time. And are provided.

Further, in the elevator door apparatus according to the present invention, the electric motor for opening and closing the door and the power circuit connected to the main power supply circuit are connected to control the electric motor via the output of the microcomputer. Detects the time required for the residual voltage of the capacitor provided for smoothing the power supply at the time of power shutdown to reach the reference voltage for determining the capacity decrease of the capacitor, and detects the capacity decrease when the time is shorter than the reference time. A control device that generates a signal, detects a voltage of the main power supply circuit before power-off, and corrects the reference voltage according to the detected value is provided.

Further, in the elevator door apparatus according to the present invention, an electric motor for opening and closing the door and a power circuit connected to the main power supply circuit are connected to control the electric motor through the output of the microcomputer and the opening and closing operation of the door. And a controller for detecting a voltage rise of the main power supply circuit therein and generating a capacitor capacitance drop detection signal when the detected value is equal to or higher than a specified value.

Further, in the elevator door apparatus according to the present invention, there is provided a notifying device which operates in response to the capacitor capacity decrease detection signal of the control device to notify the replacement of the capacitor.

Further, the elevator door apparatus according to the present invention is provided with the capacitor switching circuit which operates in response to the capacitor capacity decrease detection signal of the control device and switches to the spare capacitor.

Further, in the elevator door device according to the present invention, a control device for controlling the door opening / closing operation at a low speed by generating the capacitor capacity decrease detection signal is provided.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1. FIG. 1 is a diagram showing an example of an embodiment of the present invention and is a diagram corresponding to FIG. 16 described above. An elevator door device is configured similarly to the above-described FIGS. 15 to 18 except for FIG. In the figure, 1 is an electric motor for driving a door opening / closing mechanism (not shown), 2 is an encoder,
It is connected to the electric motor 1 and generates a pulse proportional to the rotation angle of the electric motor 1. A power circuit 3 is connected to the electric motor 1 and is composed of a MOS-FET connected to a main power supply circuit 4 composed of a DC power supply, which will be described later, and converts DC into AC.

Reference numeral 4 denotes a main power supply circuit, which is composed of an AC power supply 12 supplied from a machine room (not shown) of the elevator, an inspection switch 13 provided on an elevator car (not shown) for shutting off power, and a diode. Rectified circuit 14, capacitor 15 for smoothing the power supply and absorbing regenerative energy during braking, energizing relay 16, normally closed contact 16a of energizing relay 16, auditory alarm 17 including a buzzer, and current limitation of auditory alarm 17. It is composed of a resistor 18. Reference numeral 19 is an auditory alarm device formed by the energizing relay 16 and the auditory alarm 17 as main parts.

In the elevator door device constructed as described above, the door is always controlled in the same manner as in FIGS. 15 to 18 described above. Further, the energizing relay 16 is normally energized, and the normally closed contact 16a thereof is open. When a worker rides on the elevator car to perform maintenance and inspection work, when the inspection switch 13 is opened and the power is cut off, the energizing relay 16 is deenergized and the normally closed contact 16
a closes.

As a result, the residual voltage of the capacitor 15 causes the circuit of +18 1716a-in FIG. In this way, the residual voltage of the condenser 15 is notified to the worker by the sound of the auditory alarm 17, that is, the operation of the auditory alarm device 19. Therefore, since the danger can be clearly notified even under high illuminance by the illumination for maintenance and inspection work, an electric shock accident due to the residual voltage of the capacitor 15 of the worker can be prevented, and the maintenance work is easy and safe. Can be converted.

Embodiment 2 FIG. 2 is a diagram showing an example of another embodiment of the present invention and is a diagram corresponding to FIG. 16 described above. Note that the elevator door device is configured similarly to the above-described FIGS. 15 to 18 except for FIG. In the figure,
The same symbols as those in FIG. 1 described above indicate corresponding parts, and 13a and 13
Reference character b is a normally open contact of the inspection switch 13, and reference character 13c is a normally closed contact of the inspection switch 13.

In the elevator door device constructed as described above, the doors are always controlled in the same manner as in FIGS. 15 to 18 described above. Since the auditory alarm device 19 is provided, the same operation as that of the embodiment of FIG. 1 can be obtained. Also, when a worker rides on the elevator car to perform maintenance and inspection work, the normally closed contact 13c is closed and the energization relay 16 is deenergized when the inspection switch 13 is opened and the power is cut off. The normally closed contact 16a is closed.

As a result, the residual voltage of the capacitor 15 causes +18 1716a 13c-in FIG.
The audible alarm 17 is energized by the circuit of FIG. In this way, the residual voltage of the capacitor 15 is changed to the auditory alarm 17
Of the sound, that is, the operation of the auditory alarm device 19 notifies the worker.

Therefore, when the AC power supply 12 is cut off for a reason other than the operation of the inspection switch 13 by a worker, the auditory alarm device 19 does not operate, and the auditory alarm device 19 does not operate. No false alarms are blocked. Therefore, it is possible to prevent a problem that a suspicious feeling occurs due to a false alarm operation of the auditory alarm device 19.

Embodiment 3 FIG. FIG. 3 is also a diagram showing an example of another embodiment of the present invention, and is an enlarged perspective view of a condenser portion. The elevator door device is configured in the same manner as in FIGS. 15 to 18 except for FIG. In the figure, 20 is an insulating cap made of a transparent material, which is fitted to cover the terminals of the capacitor 15.

In the elevator door device constructed as described above, the door is always controlled in the same manner as in FIGS. 15 to 18 described above. Since the auditory alarm device 19 is provided, the same operation as that of the embodiment of FIG. 1 can be obtained. Further, the insulating cap 20 is fitted on the terminal portion of the capacitor 15. Therefore, even if the worker touches the capacitor 15 with the residual voltage when he / she rides on the elevator car and performs maintenance / inspection work,
There is no direct contact with the terminals of the condenser 15.

Therefore, it is possible to prevent an electric shock accident of a worker at the time of maintenance and inspection and to improve safety. Moreover, since the insulating cap 20 is made of a transparent material,
It is possible to easily inspect the screw tightened state and the like at the terminals of the condenser 15 and to streamline the inspection work.

Fourth Embodiment FIG. 4 is also a view showing an example of another embodiment of the present invention, which is equivalent to the above-mentioned FIG.
An elevator door device is configured similarly to the above-described FIGS. 15 to 18 except for FIG. In the figure, 20
Is an insulating cap made of a transparent material fitted to cover the terminals of the capacitor 15, 21 is a through hole provided on the upper surface of the insulating cap 20 and facing the terminals of the capacitor 15, and 22 is for measuring the terminal voltage. In the voltmeter, the contactor is inserted into the through hole 21 and connected to the terminal of the capacitor 15 as needed.

In the elevator door device constructed as described above, the door is always controlled in the same manner as in FIGS. 15 to 18 described above. Since the auditory alarm device 19 is provided, the same operation as that of the embodiment of FIG. 1 can be obtained. Moreover, since the insulating cap 20 made of a transparent material is fitted to the terminal portion of the capacitor 15, the same operation as that of the above-described embodiment of FIG. 3 can be obtained.

Also, in the embodiment of FIG. 4, the contact of the voltmeter 22 for measuring the terminal voltage is inserted into the through hole 21 and connected to the terminal of the capacitor 15 as needed, and the terminal voltage of the capacitor 15 is measured. To be done. Therefore, the terminal voltage of the capacitor 15 can be easily measured, and the maintenance and inspection work can be streamlined.

Embodiment 5. 5 to 7 are also diagrams showing an example of another embodiment of the present invention, FIG. 5 is a circuit diagram conceptually showing electrical connection, and FIG. 6 is a flow chart for explaining the operation by the circuit of FIG. FIG. 7 is a graph showing the characteristic of the DC power supply voltage drop when the DC power supply of the main power supply circuit of FIG. 5 is cut off. An elevator door device is configured similarly to the above-described FIGS. 15 to 18 except for FIGS. 5 to 7.

In the figure, the same reference numerals as those in the above-mentioned FIGS. 15 to 18 indicate the corresponding parts, and 23 is a DC power supply voltage monitoring circuit arranged between the main power supply circuit 4 and the A / D converter 56. The high voltage of the DC power supply of the circuit 4 is converted into a weak voltage proportional to the voltage of the DC power supply and supplied to the A / D converter 56. 2
Reference numeral 4 denotes a capacitor capacity drop detection signal which is activated by the output signal of the input / output port 53 of the microcomputer 5.

In the elevator door device constructed as described above, the door is controlled in the same manner as in FIGS. 15 to 18 described above. The operation of the elevator door device according to FIGS. 5 to 7 will be described with reference to the flowchart shown in FIG. That is, the program of this flowchart is R
It is stored in the OM 57, and if the power supply of the main power supply circuit 4 is reversed from ON to OFF in step 201, the process proceeds to step 202. Then, in step 202, the DC power supply voltage monitoring circuit 2
The read value of the DC power supply voltage sent from the No. 3 to the A / D converter 56 is checked.

Next, in step 203, the timer is counted and then in step 204, the A / D converter 5
If the read value of the DC power supply voltage sent to 6 is not less than the reference value, the process returns to step 202, and if it is less than the reference value, the process proceeds to step 205. If the timer value is equal to or smaller than the reference value in step 205, it is determined that the capacity of the capacitor 15 is insufficient due to the short discharge time of the capacitor 15, and the process proceeds to step 206.

Then, in step 206, the capacitor capacity drop detection signal 24 is activated to notify the abnormality of the capacitor 15. If the timer value is not less than the reference value in step 205, the condenser 15 is determined to be normal. The capacity of the condenser 15 decreases with the passage of time as shown in FIG. 18, but sharply decreases after the elapse of a predetermined time.

The DC power supply voltage when the DC power supply of the main power supply circuit 4 is cut off decreases as shown in FIG. That is, when the input voltage is cut off, the capacitor 15 is cut off and the voltage of the main power supply circuit 4 drops due to the characteristics shown in FIG. If the capacitance of the capacitor is normal, the characteristic shown by the solid line is obtained, and the timer value in step 205 when the read value of the DC power supply voltage sent to the A / D converter 56 in step 204 is equal to or less than the reference value. Since t1 is equal to or larger than the reference value, the condenser 15 is determined to be normal.

When the capacity of the capacitor 15 is decreased, the characteristic shown by the alternate long and short dash line is obtained, and the read value of the DC power supply voltage sent to the A / D converter 56 in step 204 is the reference value. Step 2 when
The timer value t2 in 05 becomes equal to or less than the reference value, and the capacity of the capacitor 15 is determined to be low. As a result, the capacitor capacity drop detection signal 24 is activated to notify the abnormality of the capacitor 15.

Therefore, abnormality due to deterioration or failure of the capacitor 15 can be easily detected, and the capacitor 15 can be replaced before the end of its service life, or the capacitor 15 can be deteriorated before the periodical replacement cycle and the door can be damaged. It is possible to prevent problems such as inability to open / close and damage to the control device 11 in advance.

Embodiment 6 FIG. In the embodiments of FIGS. 5 to 7, the time required for the residual voltage of the capacitor 15 at the time of shutting off the DC power supply of the main power supply circuit 4 to reach the reference voltage for determining the voltage drop of the main power supply circuit 4 is collated. To be done. Then, when this required time is shorter than the reference time, a decrease in the capacity of the capacitor 15 is detected.

With respect to such a configuration, the time required for the voltage of the DC power supply when the DC power supply of the main power supply circuit 4 is turned on to reach the reference voltage for judging the rise of the power supply having the capacitor 15 is checked. It can be easily configured. As a result, when the time required to reach the reference voltage for determining the rise of the power supply is shorter than the reference time, it is possible to detect the capacitance decrease of the capacitor 15. Even with such a configuration, the same operation as that of the embodiment shown in FIGS. 5 to 7 can be obtained.

Embodiment 7 FIG. 7 and 8 are also diagrams showing an example of another embodiment of the present invention. FIG. 7 is a graph showing a DC power supply voltage lowering characteristic when the DC power supply of the main power supply circuit of the elevator door apparatus is cut off. 3 is a flowchart illustrating the operation of the elevator door device. In addition,
An elevator door device is configured in the same manner as in FIGS. 5 to 7 except for FIGS. 7 and 8.

In the elevator door device of FIGS. 7 and 8, the door is controlled in the same manner as in FIGS. 15 to 18 described above. The operation of the elevator door device according to FIGS. 7 and 8 will be described with reference to the flowchart shown in FIG. That is, the program of this flowchart is RO
The read value of the DC power supply voltage stored in M57 and sent from the DC power supply voltage monitoring circuit 23 to the A / D converter 56 in step 301 is checked.

Then, in step 302, a reference value of the power supply voltage for determination in step 306 described later is set according to the read value of the DC power supply voltage. The reference value of the power supply voltage is RO as a value corresponding to the power supply voltage.
It is stored as M57 data. Then, in step 303, if the power of the main power supply circuit 4 is turned on and off, the process proceeds to step 304. Then, in step 304, the read value of the DC power supply voltage sent from the DC power supply voltage monitoring circuit 23 to the A / D converter 56 is checked.

Next, in step 305, the timer is counted and then in step 306, the A / D converter 5
If the read value of the DC power supply voltage sent to 6 is less than the reference value, the process returns to step 304, and if it is less than the reference value, the process proceeds to step 307. If the timer value is equal to or less than the reference value in step 307, it is determined that the capacity of the capacitor 15 is insufficient due to the short discharge time of the capacitor 15, and the process proceeds to step 308. Then, step 308
The capacitor capacity drop detection signal 24 is energized to notify the abnormality of the capacitor 15.

If the timer value is not less than the reference value in step 307, the condenser 15 is judged to be normal. As described above, before it is determined in step 303 whether the power supply of the main power supply circuit 4 is reversed from on to off, in step 301, the DC power supply voltage monitoring circuit 23 outputs A
The read value of the DC power supply voltage sent to the / D converter 56 is checked. Then, in step 302, the reference value of the power supply voltage for determination in step 306 described later is corrected according to the read value of the DC power supply voltage.

Further, the DC power supply voltage when the DC power supply of the main power supply circuit 4 is cut off decreases as shown in FIG. That is, depending on the DC voltage when the power of the main power supply circuit 4 is turned on, the characteristic shown by the one-dot chain line is shown when the DC voltage is normal, and the characteristic shown by the three-dot chain line when the DC voltage is low.
Then, the same value as the timer value t2 can be obtained as shown in FIG. 7 by setting the reference value of the power supply voltage for the determination in step 306 by the voltage of the DC power supply.

In short, this embodiment is based on the main power supply circuit 4
According to the DC power supply voltage, the reference voltage for determining the voltage drop of the DC power supply is corrected. Therefore, abnormality due to deterioration or failure of the capacitor 15 can be easily detected with high accuracy, and the capacitor 15 can be replaced before its life reaches its end, or the capacitor 15 is deteriorated before the periodical replacement cycle. Can not open and close,
It is possible to prevent a problem that the control device 11 is damaged.

Embodiment 8. 9 and 10 are also diagrams showing an example of another embodiment of the present invention. FIG. 9 is a flow chart for explaining the operation of the elevator door device, and FIG.
0 is a graph showing the characteristics of the door operation and the DC power supply voltage of the main power supply circuit in the elevator door device of FIG. The elevator door device is configured in the same manner as in FIGS. 5 to 7 except for FIGS. 9 and 10.

In the elevator door device of FIGS. 9 and 10, the door is controlled in the same manner as in FIGS. 15 to 18 described above. The operation of the elevator door device will be described with reference to the flowchart shown in FIG. That is, the program of this flowchart is stored in the ROM 57, the door opening / closing command is read from the elevator control panel 8 in step 401, and the process proceeds to step 402.

Then, in step 402, the door opening command signal 8
If it is 1, the process proceeds to step 403, the data value of the pulse counting unit 51 is read, and the door closing command signal 82
If so, the process proceeds to step 404. In addition, step 403
To step 405, the fully open position signal 71 and the fully closed position signal 72 are input from the position switch 7, the door position is calculated from the data value of the pulse counting unit 51, and the process proceeds to step 406.

Thus, in step 406, the speed Vt of the electric motor 1 is calculated from the data value of the pulse counting unit 51. Then, the process proceeds to step 407, and the read value of the DC power supply voltage of the main voltage circuit 4 supplied from the DC power supply voltage monitoring circuit 23 to the A / D converter 56 is checked.

Then, the process proceeds to step 408, and if the read value of the DC power supply voltage of the main voltage circuit 4 is not less than the reference value,
Step 409 as occurrence of capacity failure of the condenser 15
Then, the capacitor capacity drop detection signal 24 is energized to notify the abnormality of the capacitor 15. If the read value of the DC power supply voltage of the main voltage circuit 4 is not the reference value or more, the process proceeds to step 410, and the speed command modes of acceleration, constant and deceleration are discriminated according to the position of the door, and step 4 is executed.
Proceed to 11.

In step 411, the speed command value Vp corresponding to the position of the door is read from the ROM 57 and step 4
12, the deviation between the speed command value Vp and the speed Vt is calculated. Next, in step 413, the phase compensation calculation is performed, and in step 414, the speed command value Vp and the speed Vt are calculated.
The deviation K is multiplied by the gain K. Next, the routine proceeds to step 415, where the torque is limited by the position of the door, and at step 416 the PWM device 54 is supplied with the calculated value at step 414 and a PWM signal is issued.

Although detailed description is omitted in step 404, the operation corresponding to the door closing command is performed in accordance with the case of the door opening command. In addition, the PWM signal is output to the gate signal generation circuit 6, and the MOS-FET of the power circuit 3 is output.
The speed of the electric motor 1, that is, the speed of the door is controlled with high accuracy by the PWM control of the gate of the.

As shown in FIG. 10, the door of the elevator door device operates and the DC power supply voltage of the main power supply circuit 4 changes. When the capacity of the capacitor 15 is normal, the DC power supply voltage of the main power supply circuit 4 has the characteristic shown by the solid line in FIG. Further, when the capacity of the capacitor 15 is insufficient, the DC power supply voltage of the main power supply circuit 4 has the characteristic shown by the alternate long and short dash line in FIG. 10. This is because when the capacity of the capacitor 15 decreases, the regenerative energy during braking of the door is absorbed. Is insufficient and the DC power supply voltage rises.

In this way, the rise in the DC power supply voltage during the opening and closing operation of the door is detected, and when the voltage rise value becomes equal to or more than the specified value, the capacity failure of the capacitor 15 is detected. Therefore, abnormality due to deterioration or failure of the condenser 15 can be easily detected, and the condenser 15 can be replaced before the end of its life, or the condenser 15 is deteriorated before the periodical replacement cycle and the door cannot be opened or closed. It is possible to prevent problems that may occur or damage the control device 11 in advance.

Embodiment 9 FIG. 11 is also a diagram showing an example of another embodiment of the present invention, and FIG. 11 is a main-portion circuit diagram conceptually showing electrical connection. An elevator door device is configured similarly to FIGS. 5 to 7 except for FIG. 11.

In the figure, reference numeral 24 is a capacitor capacity lowering detection signal which is activated by an output signal of the input / output port 53 of the microcomputer 5, and 25 is an informing device which operates by receiving the capacitor capacity lowering detection signal 24. Although omitted, it is composed of a visual indicator using a lamp and an auditory indicator using a buzzer.

In the elevator door device constructed as described above, the door is controlled in the same manner as in FIGS. 15 to 18 described above. When the capacity of the condenser 15 has decreased, the condenser capacity decrease detection signal 24 is activated as in the elevator door device according to FIGS. Then, the notification device 25 is operated by the capacitor capacity decrease detection signal 24 to notify that the capacity of the capacitor 15 is decreased.

In this way, the operation of the alarm device 25 accurately displays the occurrence of abnormality due to deterioration or failure of the capacitor 15, so that the capacitor 15 can be replaced quickly. Therefore, it is possible to prevent the problem that the door cannot be opened and closed. Further, if the voltage of the main circuit power supply 4 becomes too high, the semiconductor element connected to the DC power supply may be damaged due to insufficient withstand voltage, but such a problem can be prevented in advance.

Tenth Embodiment FIG. 12 is also a diagram showing an example of another embodiment of the present invention, and FIG. 12 is a main part circuit diagram conceptually showing the electrical connection and corresponds to FIG. 1 described above. The elevator door device is configured in the same manner as in FIGS. 5 to 7 except for FIG. In the figure, the same reference numerals as those in FIGS. 1 and 5 indicate corresponding parts, 26 is a spare capacitor similar to the capacitor 15, 27 is a transistor, 28 is a switching relay, 28a is a switching relay 2
8 is a normally closed contact, and 28b is a normally open contact of the switching relay 28. Reference numeral 29 is a capacitor switching circuit constituted by the switching relay 28.

In the elevator door apparatus constructed as described above, the switching relay 28 is normally deenergized, and the capacitor 15 is energized by the + 28a 15-circuit to make it similar to FIGS. 15 to 18 described above. The door is controlled. When the capacity of the condenser 15 has decreased, the condenser capacity decrease detection signal 24 is activated as in the elevator door device according to FIGS. Then, the switching relay 28 is energized by the capacitor capacity drop detection signal 24.

The energizing of the switching relay 28 opens the normally closed contact 28a and closes the normally open contact 28b. As a result, the spare capacitor 26 is energized by the + 28b 26-circuit and the capacitor 1 whose capacity has decreased
5 is disconnected from the circuit and the door is controlled via a spare capacitor 26. Therefore, when an abnormality such as deterioration or failure of the condenser 15 occurs, the condenser switching circuit 29 automatically connects the auxiliary condenser 26 to the circuit, so that the door cannot be opened or closed, or the control device 1
It is possible to prevent the problem that 1 is damaged.

Embodiment 11 FIG. 13 and 14 are also diagrams showing an example of another embodiment of the present invention. FIG. 13 is a flowchart for explaining the operation of the elevator door apparatus, and FIG. 14 is a door operation and main operation in the elevator door apparatus of FIG. It is a graph which shows the characteristic of the direct-current power supply voltage of a power supply circuit. In addition, other than FIG. 13 and FIG.
~ An elevator door device is constructed as in Fig. 7.

In the elevator door device of FIGS. 13 and 14, the door is controlled in the same manner as in FIGS. 15 to 18 described above. The operation of the elevator door device is shown in FIG.
This will be described with reference to the flowchart shown in FIG. That is, the program of this flowchart is stored in the ROM 57, the door opening / closing command is read from the elevator control panel 8 in step 501, and the process proceeds to step 502. If it is the door opening command signal 81 in step 502, the process proceeds to step 503 to read the data value of the pulse counting unit 51, and if it is the door closing command signal 82, the process proceeds to step 504.

In addition, steps 503 to 505
To the fully open position signal 71 and the fully closed position signal 72 from the position switch 7, and the pulse counting unit 5
The position of the door is calculated from the data value of 1 and step 50
Go to 6. Accordingly, in step 506, the speed V of the electric motor 1 is calculated from the data value of the pulse count unit 51.
t is calculated. Then, the process proceeds to step 507, and the read value of the DC power supply voltage of the main voltage circuit 4 supplied from the DC power supply voltage monitoring circuit 23 to the A / D converter 56 is checked.

Then, the process proceeds to step 508, and if the read value of the DC power supply voltage of the main voltage circuit 4 is not less than the reference value,
Step 509 as the capacity failure of the condenser 15 occurs.
Then, the capacitor capacity drop detection signal 24 is energized to notify the abnormality of the capacitor 15. Then, the process proceeds to step 5091 and the low speed command value V corresponding to the position of the door.
Read p and proceed to step 512. Step 5
If the read value of the DC power supply voltage of the main voltage circuit 4 is not equal to or greater than the reference value at 08, the process proceeds to step 510, where speed command modes of acceleration, constant speed and deceleration are determined according to the position of the door, and the process proceeds to step 511. .

In step 511, the speed command value Vp corresponding to the position of the door is read from the ROM 57, and step 5
12, the deviation between the speed command value Vp and the speed Vt is calculated. Next, in step 513, phase compensation calculation is performed, and in step 514, the speed command value Vp and the speed Vt are calculated.
The deviation K is multiplied by the gain K. Next, the routine proceeds to step 515, where the torque is limited by the position of the door, and at step 516 the PWM device 54 is supplied with the calculated value at step 514 and a PWM signal is issued.

Although detailed description is omitted in step 504, the operation corresponding to the door closing command is performed in accordance with the case of the door opening command. In addition, the PWM signal is output to the gate signal generation circuit 6, and the MOS-FET of the power circuit 3 is output.
The speed of the electric motor 1, that is, the speed of the door is controlled with high accuracy by PWM controlling the gate of the.

The DC power supply voltage of the main power supply circuit 4 when the door is opened and closed at the normal speed has the characteristics shown by the solid line in FIG. When the capacity failure of the capacitor 15 occurs, the DC power supply voltage of the main power supply circuit 4 rises as shown in FIG. 14, but in this case, the speed of the door is decreased to reduce the DC power supply voltage of the main power supply circuit 4. Can be kept low.

As described above, when the capacity of the capacitor 15 is insufficient, the speed of the door is reduced through the operation of reading the low speed command value Vp corresponding to the position of the door in step 5091. The voltage can be kept low. By controlling the door opening / closing operation at a low speed, it is possible to prevent the control device 11 from being damaged, and prevent an accident in which the elevator device becomes unusable.

[0082]

As described above, the present invention includes the electric motor for opening and closing the door, the control device for controlling the electric motor through the output of the microcomputer, and the main power supply circuit connected to the power circuit of the control device. The present invention is provided with an audible alarm device which operates when the voltage of a capacitor provided for smoothing the power supply remains when the power is cut off.

As a result, the residual voltage of the capacitor is notified by the operation of the auditory notification device when the main power supply circuit connected to the power circuit of the control device is shut off. Therefore, the danger can be clearly notified even under high illuminance due to the illumination for maintenance and inspection work, so it is possible to prevent an electric shock accident due to the residual voltage of the capacitor of the worker, simplifying and safety maintenance work. Has the effect of

Further, according to the present invention, as described above, when the main power supply circuit connected to the power circuit of the control device is cut off by the operation of the check switch, the voltage remaining in the capacitor provided for smoothing the power supply remains. The audible alarm device is operated by.

As a result, when the main power supply circuit connected to the power circuit of the control device is cut off by the operation of the inspection switch, the residual voltage of the capacitor is notified by the operation of the auditory notification device. Therefore, the danger can be clearly notified even under high illuminance due to the illumination for maintenance and inspection work, so it is possible to prevent an electric shock accident due to the residual voltage of the capacitor of the worker, simplifying and safety maintenance work. Has the effect of Also, if the main power circuit is cut off due to a reason other than the operation of the inspection switch by the worker due to a power failure of the AC power supply, etc. It has the effect of eliminating the suspicious feeling caused by various operations.

Further, as described above, the present invention includes the electric motor for opening and closing the door, the control device for controlling the electric motor through the output of the microcomputer, and the main power supply circuit connected to the power circuit of the control device. An insulating cap made of a transparent material is provided to cover the terminals of the capacitor provided for smoothing the power supply.

As a result, when a worker rides on the car of an elevator and performs maintenance work, even if he touches a capacitor having a residual voltage, the terminal of the capacitor is not directly contacted. Therefore, it is possible to prevent the electric shock accident of the worker at the time of maintenance and inspection, and there is an effect that the safety is improved. Further, since it is an insulating cap made of a transparent material, it is possible to easily inspect the screw tightening state and the like at the terminals of the capacitor, which has the effect of streamlining the inspection work.

Further, as described above, the present invention is provided with the insulating cap having the through hole arranged so as to face the terminal of the capacitor.

As a result, when a worker rides on the car of an elevator and performs maintenance work, even if he touches a capacitor having a residual voltage, the terminal of the capacitor is not directly contacted. Therefore, it is possible to prevent the electric shock accident of the worker at the time of maintenance and inspection, and there is an effect that the safety is improved. Further, since it is an insulating cap made of a transparent material, it is possible to easily inspect the screw tightening state and the like at the terminals of the capacitor, which has the effect of streamlining the inspection work. In addition, the terminal voltage can be measured through the through hole of the capacitor, which has the effect of streamlining maintenance and inspection work.

As described above, according to the present invention, the electric motor for opening and closing the door and the power circuit connected to the main power supply circuit are connected to control the electric motor through the output of the microcomputer, and the power supply of the main power supply circuit is controlled. When the residual voltage of the capacitor provided for smoothing the power supply at the time of interruption is detected, it detects the decrease time until it reaches the reference voltage for judging the decrease in the capacity of the capacitor, and when the decrease time is shorter than the reference time, the capacitor capacity decrease detection signal And a control device for generating.

As a result, when the capacity of the capacitor is decreased, the capacitor capacity decrease detection signal is activated to notify the abnormality of the capacitor. Therefore,
Abnormalities due to deterioration or failure of the condenser can be easily detected, the condenser is replaced before the end of its life, or the condenser deteriorates before the regular replacement cycle and the door cannot be opened or closed. This has the effect of preventing damage to the equipment.

As described above, according to the present invention, the power circuit is connected to the main power supply circuit having the electric motor for opening and closing the door and the condenser, and the electric motor is controlled through the output of the microcomputer. A control device that detects the rise time until the voltage of the power supply reaches a reference voltage for determining the rise of the power supply when the power of the circuit is turned on, and generates a capacitor capacitance decrease detection signal when the rise time is shorter than the reference time. And are provided.

As a result, when the capacity of the capacitor is decreased, the capacitor capacity decrease detection signal is activated to notify the abnormality of the capacitor. Therefore,
Abnormalities due to deterioration or failure of the condenser can be easily detected, the condenser is replaced before the end of its life, or the condenser deteriorates before the regular replacement cycle and the door cannot be opened or closed. This has the effect of preventing damage to the equipment.

As described above, according to the present invention, the electric motor for opening and closing the door and the power circuit connected to the main power supply circuit control the electric motor through the output of the microcomputer, and the power supply of the main power supply circuit is controlled. When the residual voltage of the capacitor provided for smoothing the power supply at the time of interruption is detected, it detects the decrease time until it reaches the reference voltage for judging the decrease in the capacity of the capacitor, and when the decrease time is shorter than the reference time, the capacitor capacity decrease detection signal And a control device that detects the voltage of the main power supply circuit before power-off and corrects the reference voltage according to the detected value.

In this way, the reference voltage for determining the voltage drop of the DC power supply is corrected according to the detected value of the voltage of the main power supply circuit before the power supply is cut off. Then, when the capacity of the capacitor is decreased, the abnormality of the capacitor is highly accurately verified, and the capacitor capacity decrease detection signal is activated to notify the abnormality of the capacitor. Therefore, it is possible to easily find an abnormality due to deterioration or failure of the capacitor, replace the capacitor before the end of its life, or deteriorate the capacitor before the periodical replacement cycle to make it impossible to open or close the door, This has an effect of preventing a problem that the control device is damaged.

As described above, according to the present invention, the electric motor for opening and closing the door and the power circuit connected to the main power supply circuit are connected to the electric motor to control the electric motor through the output of the microcomputer. And a control device for detecting a voltage rise of the main power supply circuit and generating a capacitor capacitance decrease detection signal when the detected value is equal to or more than a specified value.

In this way, the voltage rise of the main power supply circuit during the opening / closing operation of the door is detected, and when the voltage rise value exceeds the specified value, the capacity failure of the capacitor is detected. Therefore, abnormality due to deterioration or failure of the capacitor is clearly verified, the capacitor is replaced before the end of its life, or the capacitor is deteriorated before the periodical replacement cycle and the door cannot be opened or closed. This has the effect of preventing damage to the equipment.

Further, as described above, the present invention is provided with the informing device which operates in response to the capacitor capacity decrease detection signal of the control device to inform the replacement of the capacitor.

As described above, since the abnormality of the condenser due to deterioration or failure is accurately displayed by the operation of the alarm device, the condenser can be replaced promptly. Therefore, it is possible to prevent the occurrence of the problem that the door cannot be opened and closed, and the semiconductor element connected to the DC power supply is broken due to the failure of the capacitor due to insufficient withstand voltage and the control device is damaged. It has the effect of preventing it.

Further, as described above, the present invention is provided with the capacitor switching circuit which operates in accordance with the capacitor capacity drop detection signal of the control device and switches to the spare capacitor.

In this way, when an abnormality occurs due to deterioration or failure of the capacitor, the capacitor switching circuit automatically connects the spare capacitor to the circuit, which may cause the door to be unable to open or close, or the control device to be damaged. It has the effect of preventing defects.

Further, as described above, the present invention is provided with the control device for controlling the door opening / closing operation at low speed by generating the capacitor capacity decrease detection signal.

In this way, when the capacity of the condenser is insufficient, the opening / closing operation of the door is controlled at a low speed to suppress the DC power supply voltage of the main power supply circuit to a low level, preventing damage to the control device and making the elevator device unusable. Is effective in preventing the occurrence of.

[Brief description of drawings]

FIG. 1 is a diagram showing the first embodiment of the present invention and is equivalent to FIG. 16 described later.

FIG. 2 is a view showing the second embodiment of the present invention and is equivalent to FIG. 16 described later.

FIG. 3 is a diagram showing a third embodiment of the present invention, and is an enlarged perspective view of a capacitor portion of an elevator door device main power supply circuit.

FIG. 4 is a view showing Embodiment 4 of the present invention, and is an enlarged perspective view of a capacitor portion of the elevator door device main power supply circuit.

FIG. 5 is a diagram showing a fifth embodiment of the present invention and is a circuit diagram conceptually showing electrical connection of an elevator door device.

FIG. 6 is a flowchart illustrating an operation of the circuit of FIG.

FIG. 7 is a characteristic of the main power supply circuit shown in FIG. 5 of decreasing the DC power supply voltage when the DC power supply is cut off, and a decrease of the DC power supply voltage when the main power supply circuit of the elevator door apparatus showing the sixth embodiment of the present invention is cut off. A graph showing characteristics.

FIG. 8 is a diagram showing the seventh embodiment of the present invention and is a flowchart for explaining the operation of the elevator door device.

FIG. 9 is a diagram showing the eighth embodiment of the present invention and is a flowchart for explaining the operation of the elevator door device.

10 is a graph showing the characteristics of the door operation and the DC power supply voltage of the main power supply circuit in the elevator door device of FIG.

FIG. 11 is a diagram showing the ninth embodiment of the present invention, and is a main-portion circuit diagram conceptually showing the electrical connection of the elevator door device.

FIG. 12 is a view showing a tenth embodiment of the present invention, which is a main part circuit diagram conceptually showing the electrical connection of the elevator door device, and is equivalent to FIG. 1 described above.

FIG. 13 is a diagram showing the eleventh embodiment of the present invention and is a flowchart for explaining the operation of the elevator door device.

14 is a graph showing the characteristics of the door operation and the DC power supply voltage of the main power supply circuit in the elevator door device of FIG.

FIG. 15 is a view showing a conventional elevator door device, and a circuit diagram conceptually showing electrical connection.

16 is a main power supply circuit diagram connected to the power circuit of FIG.

17 is a flowchart illustrating the operation of the elevator door device using the circuit of FIG.

FIG. 18 is a graph showing a capacitance change of a capacitor provided in the main power supply circuit of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 motor, 3 power circuit, 4 main power circuit, 5 microcomputer, 11 control device, 13 inspection switch, 15 condenser, 19 auditory alarm device, 20
Insulation cap, 21 through holes, 24 condenser capacity drop detection signal, 25 alarm device, 26 preliminary condenser, 29 condenser switching circuit.

Claims (11)

[Claims] 1. An electric motor for opening and closing a door, a control device for controlling the electric motor through an output of a microcomputer, and a main power circuit connected to a power circuit of the control device. Elevator door device equipped with an audible alarm device that operates due to the remaining voltage of the capacitor provided for the vehicle. 2. An audible alarm device which operates when the main power circuit connected to the power circuit of the control device is cut off by the operation of the inspection switch by the remaining voltage of the capacitor provided for smoothing the power supply. The elevator door device according to claim 1, wherein: 3. An electric motor for opening and closing a door, a control device for controlling the electric motor via an output of a microcomputer, and a main power supply circuit connected to a power circuit of the control device for smoothing the power supply. Elevator door device with an insulating cap made of transparent material that covers the terminals of the capacitor. 4. The elevator door apparatus according to claim 3, wherein the insulating cap has a through hole arranged so as to face the terminal of the capacitor. 5. An electric motor for opening and closing a door, and a power circuit connected to a main power supply circuit for controlling the electric motor through the output of a microcomputer, and for smoothing the power supply when the main power supply circuit is powered off. Control for detecting the time required for the remaining voltage of the provided capacitor to reach the reference voltage for determining the capacity decrease of the capacitor, and for generating the capacitor capacity decrease detection signal when the decrease time is shorter than the reference time. Elevator door device with device. 6. An electric motor for opening and closing a door, and a power circuit having a power source connected to a main power supply circuit for controlling the electric motor via an output of a microcomputer, and at the time of power-on of the main power supply circuit. And a controller for detecting a rise time until the voltage of the power supply reaches a reference voltage for judging the rise of the power supply and generating a capacitor capacitance decrease detection signal when the rise time is shorter than the reference time. Elevator door device. 7. An electric motor for opening and closing a door and a power circuit connected to a main power supply circuit for controlling the electric motor via an output of a microcomputer, and for smoothing the power supply when the main power supply circuit is shut off. The remaining voltage of the provided capacitor detects a decrease time until it reaches a reference voltage for determining the capacity decrease of the capacitor, and generates a capacitor capacity decrease detection signal when the decrease time is shorter than the reference time, An elevator door apparatus, further comprising: a control device that detects a voltage of the main power supply circuit before the power is cut off and corrects the reference voltage according to the detected value. 8. An electric motor for opening and closing a door, and a power circuit connected to a main power supply circuit for controlling the electric motor through an output of a microcomputer, and a voltage of the main power supply circuit during the opening and closing operation of the door. An elevator door device provided with a controller for detecting a rise and generating a capacitor capacity drop detection signal when the detected value is equal to or higher than a specified value. 9. The elevator door apparatus according to claim 5, further comprising a notification device that operates in response to a capacitor capacity decrease detection signal of the control device to notify replacement of the capacitor. 10. A capacitor switching circuit which operates in response to a capacitor capacity drop detection signal of the control device to switch to a spare capacitor.
The elevator door device according to claim 8. 11. The elevator door device according to claim 5, wherein the elevator door device is a control device that controls a door opening / closing operation at a low speed by generating a capacitor capacity decrease detection signal.