JPH07315734A - Control device of elevator door - Google Patents

Abstract

PURPOSE:To avoid free motion when the door control function is stopped by furnishing a control means to control the drive of a DC motor in conformity to an opening/closing signal for an elevator door, and equipping this control means with a braking logic circuit which emits a brake signal regardless of failure of the door opening/closing signal in conformity to the brake signal generated during the door opening/closing motion. CONSTITUTION:A control device for an elevator door comprises a driving element 2 turned on when the door is to be closed, a driving element 3 operating when the door is to be opened or when brake is applied to the door closing motion, a driving element 4 to operate when the door is to be closed or when brake is applied to the door opening motion, and a driving element 5 turned on when the door is to be closed, and thereby the current feeding direction to a DC motor 10 is inverted through these driving elements 2-5 constituting a bridge structure. A logic circuit 13 is furnished to emit a brake signal, when a brake signal is generated from a brake signal generating means 12g during the door opening or closing motion, and is equipped with inverter elements 13i and 13j to emit the inverted signals of a door open signal and a door close signal, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator door opening / closing control device for controlling opening / closing of an elevator door, and in particular,
The present invention relates to a control device for an elevator door, which prevents free operation when the control function of the door is stopped and also brakes the door by a self-closing device so that the door is not fully closed.

[0002]

2. Description of the Related Art FIG. 9 is a block diagram of a conventional elevator door control device known from Japanese Utility Model Laid-Open No. 41748/1992. In FIG. 9, 1 is a rectifying element 1a
˜1d, AC power supply 1e, DC power supply device composed of smoothing capacitor 1f, 2 is a drive element that is turned on during the door closing power running operation,
Reference numeral 3 denotes a drive element that operates during the door opening power running operation and the door closing braking operation, 4 denotes a drive element that operates during the door closing power running operation and the door opening braking operation, and 5 denotes a drive element that is turned on during the door opening power running operation.
Reference numeral 9 denotes a rectifying element that can be energized in a direction opposite to the conduction direction of the driving elements 2 to 5, and 10 denotes a self-exciting DC motor (hereinafter, simply referred to as a DC motor), and the driving elements 2 to 5 having a full bridge structure. Thus, a driving means for reversibly controlling the current flowing direction to the DC motor 10 by reversing the direction is constituted.

Further, 11 is an elevator control panel, and 11a and 11b are door opening signals and door closing signals sent from the elevator control panel 11. Reference numeral 12 denotes a speed control device. The speed control device 12 includes a door position detector 12a for detecting the position of the door, a position detection signal thereof, and a door opening signal 11a and a door closing signal 11b from the elevator control panel 11. Speed pattern generation circuit 12 for outputting a speed command value based on
b, a speed detector 12c for detecting the speed of the DC motor 10, a differential amplifier 12d for obtaining a deviation between the speed detection signal and a speed command value, and a PW corresponding to the deviation signal.
A PWM generator circuit 12e that outputs a PWM command with a changed M width, a powering signal generator 12f that generates a powering signal when the deviation signal has a positive value, and a braking when the deviation signal has a negative value. Braking signal generating means 12g for outputting a signal
It has and.

Reference numeral 13 indicates a logic circuit having a powering logic circuit and a braking logic circuit. This logic circuit 13
AND gate element 13a for obtaining a door opening power running signal by logical product of the output of the inverter element 13g which outputs the inverted signal of the door open signal 11a and the door close signal 11b and the power running signal from the power running signal generating means 12f, and the door close Inverter element 13 that outputs an inverted signal of signal 11b and door opening signal 11a
An AND gate element 13b for obtaining a door closing power running signal by a logical product of the output of h and the power running signal from the power running signal generating means 12f, and 19 are the door closing signal 11b and the braking signal from the braking signal generating means 12g. An AND gate element 13c that obtains a door closing braking signal based on the AND gate element 13d that obtains a door opening braking signal based on the door opening signal 11 and the braking signal from the braking signal generating means 12g; OR gate element 13e for synthesizing a door closing braking signal
And an OR gate element 13f for synthesizing the door closing power running signal and the door opening braking signal. The AND gate elements 13a and 13b and the inverter elements 13g and 13h form a powering logic circuit, and the AND gate elements 13c and 13d and the OR gate elements 13e and 13f form a braking logic circuit.

Further, reference numeral 14 denotes a drive command generation circuit which outputs a drive command to the drive elements 2 to 5 based on the output from the logic circuit 13. The drive command generation circuit 14 includes an amplifier 14a for driving the drive element 5 by the output of the AND gate element 13a and an AND gate element 1
An amplifier 14b for driving the driving element 2 by the output of 8
And the output of the OR gate element 21 and the PWM generation circuit 12
and an amplifier 14c for driving the drive element 3 based on the output from e, and an amplifier 14d for driving the drive element 4 based on the output from the OR gate element 22 and the output from the PWM generation circuit 12e. There is. Based on the opening / closing signal of the elevator door by the logic circuit 13 for inputting the door opening signal and the door closing signal from the speed control device 12 and the elevator control panel 11 and the drive command generating means 14, each drive element 2 of the driving means.
A control means for driving and controlling Nos. 5 to 5 is configured.

Next, the operation of the above configuration will be described. First, during the door opening operation, the door opening signal 11a is input from the elevator control panel 11 to the logic circuit 13 and the speed pattern generation circuit 12b and the logic circuit 13 of the speed control device 12. The speed pattern generation circuit 12b generates a predetermined speed command value based on the door opening signal 11a. When the speed command value is larger than the speed detection value by the speed detector 12c, the power running is performed based on the output of the differential amplifier 12d. The signal generator 12f operates, and the powering signal generator 12f outputs a powering signal. At this time, the AND gate element 13a of the logic circuit 13 causes the door opening signal 11a and the door closing signal 11b.
It operates by the three logical products of the output of the inverter 13g for obtaining the inverted output of the power running signal and the power running signal from the power running signal generating means 12f. Based on the output of the AND gate element 13a, the amplifier 14a of the drive command generating means 14 operates, the drive element 5 operates, and the signal of the AND gate element 13a operates the OR gate element 13e and the amplifier 14c to drive. The element 3 operates.

As a result, power is supplied from the (+) side of the power supply device 1, and a current flows to the (-) side of the power supply device 1 through the drive element 5, the DC motor 10 and the drive element 3, and the DC motor 10 is Rotate. At this time, when the door is opened, the drive element 5 is continuously turned on based on the output of the amplifier 14a, while the drive element 3 is set to the output of the PWM generation circuit 12e as shown in FIGS. Based on amplifier 1
The switching operation is performed by 4e, and the pulse width is controlled according to the deviation between the speed command value and the speed detection value to gradually accelerate. After that, when the speed of the DC motor 10 reaches the speed command value and the deviation becomes small, the ON time of switching is shortened, the current flowing through the DC motor 10 is reduced, and the DC motor 10 is rotated at a constant speed. Next, when the door reaches the deceleration point, the braking operation is started.

Then, during door-open braking, that is, when the speed command value from the speed pattern generation circuit 12b becomes smaller than the speed detection value by the speed detector 12c, the power running signal generating means is output based on the output of the differential amplifier 12d. 12
The powering signal from f is cut and the braking signal generating means 12
g operates to generate a braking signal. OF of the above powering signal
At the same time as F, the drive element 5 is turned off, and the AND gate element 13d, the OR element 13f, the amplifier 14d and the drive element 4 are operated by the door open signal 11a and the braking signal from the braking signal generating means 12g to perform braking. . As a result, the generated energy generated by the rotation of the DC motor 10 causes a current to flow through the drive element 4, the rectifying element 7, and the DC motor 10, causing the DC motor 10 to perform a braking operation and decelerating the door.

That is, when the speed command generator 12b of the speed controller 12 outputs the speed command value shown by the solid line in FIG. 10A, for example, as is well known, the speed detector 12c of the DC motor 10 outputs the speed command value. The speed detection signal indicated by the dotted line in FIG. 10 (a) is detected, and as a result, the difference between the speed detection signal and the speed command value is obtained from the differential amplifier 12d as shown in FIG. 10 (b). Then, the PWM generating circuit 12e outputs a PWM command in which the PWM width is changed in accordance with the deviation signal, as shown in FIG. 10C. At this time, the deviation from the differential amplifier 12d is output. When the signal has a positive value, the powering signal generating means 12f outputs a powering signal, and when the deviation signal from the differential amplifier 12d has a negative value, the braking signal generating means 12g outputs a braking signal. That.

Here, the power running signal generating means 13 is a door opening / closing signal, a speed instruction signal of a speed instruction generating circuit 12b corresponding to the position of the door, and a speed signal obtained from a speed detector 12c attached to the DC motor 10. When the speed command signal is large, the deviation amplifier 12d for comparing the values with and operates the powering signal generation means 12f and controls the PWM generation circuit 12e according to the deviation to change the switching time to change the acceleration. . On the contrary, in the braking signal generating means, when the speed signal obtained from the speed detector 12c is large, the powering signal is turned off and the braking signal is output. Similar to the power running operation, the switching time is changed according to the deviation to change the deceleration.

Next, during the door closing operation, the door closing signal 11b is input from the elevator control panel 11 to the speed pattern generating circuit 12b and the logic circuit 13 of the speed control device 12. Based on this door closing signal 11b, the speed pattern generation circuit 12
b generates a predetermined speed command value, and when this speed command value is larger than the speed detection value by the speed detector 12c, the power running signal generating means 12 is generated based on the output of the differential amplifier 12d.
f operates, and a powering signal is output from the powering signal generating means 12f. At this time, the AND gate element 13b of the logic circuit 13 uses three logical products of the door closing signal 11b, the output of the inverter 13h which obtains the inverted output of the door opening signal 11a, and the power running signal from the power running signal generating means 12f. The drive element 2 operates and the amplifier 14b of the drive command generating means 14 operates based on the output of the AND gate element 13b to drive the drive element 2
Is operated, the OR gate element 13f and the amplifier 14d are operated by the signal of the AND gate element 13b, and the driving element 4 is operated.

As a result, power is supplied from the (+) side of the power supply device 1, and a current flows to the (-) side of the power supply device 1 through the drive element 2, the DC motor 10, and the drive element 4, and the DC motor 10 is It rotates in the direction opposite to the door opening direction. At this time, when the door is opened, the drive element 2 is continuously turned on based on the output of the amplifier 14b, while the drive element 4 is switched to the PWM generation circuit 12 as shown in FIGS.
A switching operation is performed by the amplifier 14d based on the output of e, and the pulse width is controlled according to the deviation between the speed command value and the speed detection value to gradually accelerate. Then, the DC motor 10
When the speed reaches the speed command value and the deviation becomes small, the ON time of switching is shortened, the current flowing through the DC motor 10 is reduced, and the DC motor 10 is rotated at a constant speed. Next, when the door reaches the deceleration point, the braking operation is started.

Then, when the door is closed, that is, when the speed command value from the speed pattern generating circuit 12b becomes smaller than the speed detection value by the speed detector 12c, the powering signal generating means is generated based on the output of the differential amplifier 12d. 12
The powering signal from f is cut and the braking signal generating means 12
g operates to generate a braking signal. At the same time when the powering signal is turned off, the driving element 2 is turned off and the door closing signal 11b is generated.
AND with the braking signal from the braking signal generating means 12g
The gate element 13c, the OR element 13e, the amplifier 14c, and the driving element 3 operate to brake. As a result, the generated energy generated by the rotation of the DC motor 10 causes a current to flow to the drive element 3, the rectifying element 8 and the DC motor 10, so that the DC motor 10 performs a braking operation to control the deceleration of the door.

[0014]

Since the conventional elevator door control device is configured to obtain the door opening braking by the product of the door opening signal and the braking signal, the elevator control panel 11
If the door open signal 11a is interrupted during door opening due to a defective built-in element, noise, erroneous operation, or the like, door opening braking cannot be performed and the elevator door becomes free operation. Further, the same applies to the door closing braking, and since it is configured to obtain the product of the door closing signal and the braking signal, if the door closing signal 11b is interrupted during the door closing, the door closing braking cannot be performed, and the elevator is closed. The door operates freely. Further, when a power failure occurs in the power supply device while the elevator door is open or closed, the DC motor 10 that drives the door becomes uncontrollable and the braking of the door does not work, which is dangerous to those using the elevator. It will work. Further, if the door open / close signals are simultaneously turned on or off while the elevator door is open or closed, the drive elements 2 to 5 are
Is turned off, the DC motor 10 that drives the door becomes uncontrollable, and the braking of the door does not work, which is a dangerous operation for those using an elevator.

Further, in an elevator door that cannot obtain a fully open holding force like a linear door mechanism, if the door open signal or the door close signal is turned off in the car, or the power is cut off, the self-closing force of the landing door causes If the elevator doors are fully closed and the elevator doors are fully closed, the elevator cannot be restored unless it is opened with a key from the landing. Therefore, for example, Japanese Patent Application Laid-Open No. 63-235284 discloses a braking device that prevents the door from being fully closed by a self-closing device when the door drive stop switch is operated. That is, when the door opening / closing command is not issued and the door function is lost, this braking device detects the door, sets the output of the door speed command generation circuit to zero, and allows the braking current to flow and responds only to the input from the door speed detector. By performing such control, the braking current corresponding to the self-closing speed is made to flow to limit the self-closing force, and a load is provided and the door is stopped without being fully closed by the load. However, such a braking device requires a special structure for limiting the self-closing force and a structure for stopping the door when the door is not fully closed.

The present invention has been made in order to solve the problems of the above-mentioned conventional example, and it is necessary not to have a free operation when the control function of the door is stopped and to require a special structure. The purpose is to obtain an elevator door control device that can be applied to an elevator door that cannot obtain a fully open holding force like a linear door mechanism and that can be braked by a self-closing device so that the door does not fully close Is.

[0017]

An elevator door control apparatus according to the present invention includes a DC motor for driving the elevator door,
An elevator door provided with a drive means having a drive element of a full bridge structure for reversibly controlling the rotation of the DC motor, and a control means for drive-controlling each drive element of the drive means based on an opening / closing signal of the elevator door. In the above control device, the control means includes a braking logic circuit for forcibly outputting a braking signal based on a braking signal generated during opening or closing of the door regardless of an abnormality in the door opening / closing signal. To do.

In the elevator door control apparatus according to the present invention, the braking logic circuit uses the logical product of the inversion signal of the door opening signal and the braking signal as the door closing braking signal, and the inversion signal of the door closing signal and the braking signal. A logical product with the signal may be output as the door opening braking signal.

Further, in the elevator door control apparatus according to the present invention, the braking logic circuit forcibly turns off the door opening / closing signal and the braking signal when the door opening signal and the door closing signal are simultaneously turned on. May be configured to be output.

In the elevator door control apparatus according to the present invention, the braking logic circuit is configured to forcibly output the braking signal when the door open signal and the door close signal are simultaneously turned off. Is also good.

Further, the elevator door control device of the present invention includes a self-exciting DC motor for driving the elevator door, a power supply device for supplying DC power to the self-exciting DC motor, and a rectifying element connected in antiparallel. An elevator door provided with a drive means having a bridge-type drive element for reversibly controlling the rotation of the self-excited DC motor, and a control means for drivingly controlling each drive element of the drive means based on an opening / closing signal of the elevator door. In the above control device, there is provided detection means for detecting interruption of the power supply device, and braking time switching means for braking the self-excited DC motor based on a detection signal from the detection means. is there.

Further, the elevator door control apparatus according to the present invention includes, as the braking switching means, a storage battery for supplying a DC power source, and a drive element that operates during braking based on the detection signal from the detection means is operated by the control means. The battery may be separated, and the storage battery may be connected to the control electrode terminal of the drive element to turn on the drive element.

Further, in the elevator door control apparatus according to the present invention, as the braking switching means, the drive element that operates during braking based on the detection signal from the detection means is disconnected from the control means, and the control electrode of the drive element is separated. The generated electric power of the self-excited DC motor may be supplied to the terminal to turn on the drive element thereof.

Further, the elevator door control device according to the present invention may be arranged to short-circuit both ends of the armature of the self-excited DC motor based on a detection signal from the detection means, as the braking switching means.

Further, the elevator door control device according to the present invention may be arranged so that the both ends of the power supply line are short-circuited on the basis of the detection signal from the detection means as the braking switching means.

Further, the elevator door control apparatus according to the present invention may be provided with an operation switch as the braking switching means for opening a short circuit which is short-circuited on the basis of the detection signal from the detection means.

[0027]

The elevator door controller according to the present invention includes a direct current motor for driving the elevator door, a drive means having a drive element of a full bridge structure for reversibly controlling the rotation of the direct current motor, and an elevator door opening / closing signal. In a control device for an elevator door, which includes a control means for driving and controlling each drive element of the drive means based on the above, in the control means, an abnormality of a door opening / closing signal based on a braking signal generated during door opening or closing By providing the braking logic circuit that forcibly outputs the braking signal regardless of, it is possible to perform the door opening braking operation and the door closing braking operation regardless of the door opening and closing signal.
Even when the door open / close signal is broken, the DC motor that drives the door can be immediately braked and stopped, improving the safety for the user, and the door's self-closing force fully closes the door. Prevent it from falling.

Further, in the elevator door control apparatus according to the present invention, the braking logic circuit uses the logical product of the inversion signal of the door opening signal and the braking signal as the door closing braking signal and the inversion signal of the door closing signal. Since the logical product with the braking signal is output as the door opening braking signal, even if the door opening signal is turned off during the door opening braking, the logical product of the inversion signal of the door closing signal and the braking signal is used. The door opening braking signal can be obtained regardless of whether the door opening signal is on or off, and even if the door closing signal is turned off during door closing braking, the inverted signal of the door opening signal and the braking are applied. The door closing braking signal can be obtained by the logical product of the signals and the door closing braking operation can be performed regardless of whether the door closing command is ON or OFF. Therefore, the door is driven even when the door opening / closing signal is disconnected. The DC motor can be immediately braked and stopped. , It is possible to improve the safety of the user, also prevented that fully closed is door by door of the self closing force.

Also, in the elevator door control apparatus according to the present invention, the braking logic circuit forcibly turns off the door opening / closing signal when the door opening signal and the door closing signal are simultaneously turned on,
Moreover, since the braking signal is output, even if the door opening / closing signals are simultaneously turned on during the door opening / closing operation, the DC motor for driving the door can be immediately braked to stop the door. Prevents the door from fully closing due to self-closing force.

Further, the elevator door control device according to the present invention forcibly outputs the braking logic circuit when the door opening signal and the door closing signal are simultaneously turned off during the door opening / closing operation. With this configuration, even if the door open / close signals are simultaneously turned off, the direct current motor that drives the door can be immediately braked to stop the door, and the safety for the user can be improved. Prevents the door from fully closing due to its self-closing force.

Further, the elevator door control device of the present invention includes a self-exciting DC motor for driving the elevator door, a power supply device for supplying a DC power source to the self-exciting DC motor, and a full-rectifier element connected in antiparallel. Control of an elevator door including drive means having a bridge-type drive element for reversibly controlling the self-excited DC motor, and control means for driving and controlling each drive element of the drive means based on an opening / closing signal of the elevator door. In the device, by including the detection means for detecting the interruption of the power supply device, and the braking time switching means for performing the braking operation of the self-excited DC motor based on the detection signal by the detection means, during the door opening and closing operation, Even if the power supply is cut off, the self-excited DC motor that drives the door can be immediately braked to stop the door and improve the safety for the user. To prevent the door it will be fully closed by the closing force.

Further, the elevator door control apparatus according to the present invention includes, as the braking switching means, a storage battery for supplying a DC power source, and the drive element operating during braking based on the detection signal from the detection means. In addition to disconnecting from the power supply device, the storage battery is connected to the control electrode terminal of the drive element to turn on the drive element, so that the door is driven even if the power supply is cut off during the door opening / closing operation. The DC motor can be immediately braked to stop the door and improve safety for the user.
Prevents the door from fully closing due to its self-closing force.

Further, in the elevator door control apparatus according to the present invention, as the braking switching means, the drive element that operates during braking based on the detection signal from the detection means is disconnected from the control means, and the drive element is controlled. By supplying the generated electric power of the self-excited DC motor to the electrode terminals to turn on the drive element of the self-excited DC motor, a self-excited DC motor that drives the door even when the power supply is cut off during the door opening / closing operation is provided. Immediate braking is applied to stop the door to improve safety for the user, and the door is prevented from being fully closed due to the self-closing force of the door.

Further, the elevator door control device according to the present invention is configured such that, as the braking switching means, the armature ends of the self-excited DC motor are short-circuited based on the detection signal from the detection means. Even if the power is cut off during the opening / closing operation, the motor that drives the door can be immediately braked to stop the door and improve the safety for the user. Prevent it from happening.

Further, in the elevator door control apparatus according to the present invention, the braking time switching means is configured to short-circuit both ends of the power supply line on the basis of the detection signal from the detection means, so that the door opening / closing operation is performed. Even if the power supply is cut off, the self-exciting DC motor that drives the door can be immediately braked to stop the door and improve the safety for the user. Prevent it from happening.

Further, the elevator door control apparatus according to the present invention includes, as the braking switching means, the operation switch for opening the short circuit which is short-circuited on the basis of the detection signal from the detection means. Even if you want to move the door by hand, braking can be prevented and maintenance can be performed easily.

[0037]

【Example】

Example 1. Hereinafter, the present invention will be described based on illustrated embodiments. FIG. 1 is a block diagram of a control device for elevator doors according to a first embodiment. 1, the same reference numerals as those of the conventional control device shown in FIG. 9 denote the same parts, and 1 denotes rectifying elements 1a to 1d, an AC power supply 1e, and a smoothing capacitor 1f.
A DC power supply device consisting of 2 is a drive element that is turned on during a door closing power running operation, 3 is a drive element that operates during a door opening power running operation and a door closing braking operation, and 4 is a drive that operates during a door closing power running operation and a door opening braking operation Elements 5 are drive elements that are turned on during the door-opening power running operation, 6-9 are rectifying elements that can energize in the opposite direction to the conduction direction of the drive elements 2-5, and 10 are self-exciting DC motors (hereinafter,
(Referred to simply as "DC motor"), and the DC motor 10 is driven by the drive elements 2 to 5 having a full bridge structure.
Driving means for reversible control by reversing the direction of current flow to the.

Further, 11 is an elevator control panel, and 11a and 11b are door opening signals and door closing signals sent from the elevator control panel 11. Reference numeral 12 is a door position detector 12a for detecting the position of the door, a position detection signal thereof, and a door opening signal 11a and a door closing signal 1 from the elevator control panel 11.
1b, a speed pattern generation circuit 12b for outputting a speed command value, a speed detector 12c for detecting the speed of the DC motor 10, and a differential amplifier 12d for obtaining a deviation between the speed detection signal and the speed command value. , PWM that outputs a PWM command in which the PWM width is changed according to the deviation signal
A generating circuit 12e, a powering signal generating means 12f for generating a powering signal when the deviation signal has a positive value, and a braking signal generating means 12g for outputting a braking signal when the deviation signal has a negative value.
And a speed control device.

Reference numeral 13 denotes a logic circuit having a powering logic circuit and a braking logic circuit. This logic circuit 13
Inverter element 1 that outputs an inverted signal of the door closing signal 11b
An AND gate element 13 for obtaining a door-open powering signal by logical product of 3g, the door-opening signal 11a, the output of the inverter element 13g, and the power-running signal from the powering signal generating means 12f.
a, an inverter element 13h that outputs an inverted signal of the door opening signal 11a, a door closing signal 11b, and the inverter 13h.
And an AND gate element 13b that obtains a door closing power running signal by a logical product of the output of the power running signal generating means 12f and the power running signal from the power running signal generating means 12f.
Inverter element 13i that outputs an inverted signal of 1a and inverter element 13 that outputs an inverted signal of door closing signal 11b
j, an AND gate element 13c for obtaining a logical product of the output of the inverter element 13i and the braking signal from the braking signal generating means 12g and outputting a door closing braking signal, and the inverter element 1
The AND gate element 13d, which obtains the logical product of the output of 3j and the braking signal from the braking signal generating means 12g and outputs the door opening braking signal, and the AND gate elements 13a and 13c, the logical sum of the AND gate elements 13a and 13c. OR for synthesizing closed braking signal
Gate element 13e and AND gate elements 13b and 13d
A braking logic circuit is formed by the OR gate element 13f that synthesizes the door closing power running signal and the door opening braking signal by the logical sum of the above.

Further, 14 is a drive command generation circuit for outputting a drive command to the drive elements 2 to 5 based on the output from the logic circuit 13. The drive command generation circuit 14 is
From the output of the ND gate element 13a, the amplifier 14a for driving the driving element 5, the amplifier 14b for driving the driving element 2 by the output of the AND gate element 18, the output of the OR gate element 21, and the PWM generating circuit 12e. Amplifier 14c for driving the driving element 3 based on the output of
And the output of the OR gate element 22 and the PWM generation circuit 12
An amplifier 14d for driving the drive element 4 based on the output from e, a logic circuit 13 for inputting a door opening signal and a door closing signal from the speed control device 12 and the elevator control panel 11, and a drive command. Each drive element 2 to 5 of the drive means is generated by the generation means 14 based on the opening / closing signal of the elevator door.
It constitutes a control means for driving and controlling.

That is, in the configuration of the first embodiment, FIG.
The configuration different from the conventional example shown in FIG. 3 is a braking logic circuit portion in the logic circuit 13, and forcibly outputs a braking signal when a braking signal is generated during door opening or closing regardless of an abnormality in the door opening / closing signal. It has a braking logic circuit that operates, and as a new configuration, outputs an inverted signal of the door open signal 11 from the elevator control board 11 and an inverted signal of the door close signal 12 from the elevator control board 11. In the first embodiment, the inverter element 13j for performing the door open braking signal is generated by the logical product of the inversion signal of the door close signal and the braking signal even if the door open signal is turned off during the door opening braking. As a result, the door opening braking operation can be performed regardless of whether the door opening command is ON or OFF, and even if the door closing signal is turned off during the door closing braking, the inversion signal of the door opening signal and the braking signal are Door closing braking signal by logical product Te, on the door close command, the braking logic circuit so as to be able to independently door closing braking operation off is configured. Other configurations are similar to those of the conventional control device.

Next, the operation of the above configuration will be described. First, during the door opening operation, the door opening signal 11 a is input from the elevator control panel 11 to the speed pattern generation circuit 12 b and the logic circuit 13 of the speed control device 12. The speed pattern generation circuit 12b generates a predetermined speed command value based on the door opening signal 11a, and the speed command value is used as the speed detector 12
When it is larger than the speed detection value by c, the differential amplifier 1
The power running signal generation means 12f operates based on the output of 2d, and the power running signal is output from the power running signal generation means 12f. At this time, the AND gate element 13a of the logic circuit 13
Is an output of an inverter 13g for obtaining an inverted output of the door opening signal 11a and the door closing signal 11b, and a powering signal generating means 12
It operates by three logical products of the powering signals from f,
The amplifier 14a of the drive command generating means 14 operates based on the output of the ND gate element 13a, the drive element 5 operates, and the OR gate element 13e and the amplifier 14c operate according to the signal of the AND gate element 13a to drive the drive element 3 Works.

As a result, power is supplied from the (+) side of the power supply device 1, and a current flows through the drive element 5, the DC motor 10, and the drive element 3 to the (-) side of the power supply device 1, and the DC motor 10 is driven. Rotate. At this time, when the door is opened, the drive element 5 is continuously turned on based on the output of the amplifier 14a, while the drive element 3 is set to the output of the PWM generation circuit 12e as shown in FIGS. Based on amplifier 1
The switching operation is performed by 4e, and the pulse width is controlled according to the deviation between the speed command value and the speed detection value to gradually accelerate. After that, when the speed of the DC motor 10 reaches the speed command value and the deviation becomes small, the ON time of switching is shortened, the current flowing through the DC motor 10 is reduced, and the DC motor 10 is rotated at a constant speed. Next, when the door reaches the deceleration point, the braking operation is started.

Then, at the time of door opening braking, that is, when the speed command value from the speed pattern generating circuit 12b becomes smaller than the speed detection value by the speed detector 12c, the power running signal generating means is output based on the output of the differential amplifier 12d. 12
The powering signal from f is cut and the braking signal generating means 12
g operates to generate a braking signal. At the same time when the powering signal is turned off, the drive element 5 is turned off and the door closing signal 11b is generated.
AND gate element 1 by the output of the inverter 13j for obtaining the inversion signal of and the braking signal from the braking signal generating means 12g.
3d, the OR element 13f, the amplifier 14d, and the driving element 4 operate to brake. At this time, even if the door open signal 11a is broken due to some cause during the door open braking, the door open braking is performed based on the output of the inverter 13j that obtains the inverted signal of the door closed signal 11b. Therefore, the door opening braking operation can be continued without changing the door opening braking operation.

Next, during the door closing operation, the door closing signal 11b is input from the elevator control panel 11 to the speed pattern generating circuit 12b and the logic circuit 13 of the speed control device 12. Based on this door closing signal 11b, the speed pattern generation circuit 12
b generates a predetermined speed command value, and when this speed command value is larger than the speed detection value by the speed detector 12c, the power running signal generating means 12 is generated based on the output of the differential amplifier 12d.
f operates, and a powering signal is output from the powering signal generating means 12f. At this time, the AND gate element 13b of the logic circuit 13 uses three logical products of the door closing signal 11b, the output of the inverter 13h which obtains the inverted output of the door opening signal 11a, and the power running signal from the power running signal generating means 12f. The drive element 2 operates and the amplifier 14b of the drive command generating means 14 operates based on the output of the AND gate element 13b to drive the drive element 2
Is operated, the OR gate element 13f and the amplifier 14d are operated by the signal of the AND gate element 13b, and the driving element 4 is operated.

As a result, power is supplied from the (+) side of the power supply device 1, and current flows through the drive element 2, the DC motor 10 and the drive element 4 to the (-) side of the power supply device 1, and the DC motor 10 is driven. It rotates in the direction opposite to the door opening direction. At this time, when the door is opened, the drive element 2 is continuously turned on based on the output of the amplifier 14b, while the drive element 4 is switched to the PWM generation circuit 12 as shown in FIGS.
A switching operation is performed by the amplifier 14d based on the output of e, and the pulse width is controlled according to the deviation between the speed command value and the speed detection value to gradually accelerate. Then, the DC motor 10
When the speed reaches the speed command value and the deviation becomes small, the ON time of switching is shortened, the current flowing through the DC motor 10 is reduced, and the DC motor 10 is rotated at a constant speed. Next, when the door reaches the deceleration point, the braking operation is started.

Then, when the door is closed, that is, when the speed command value from the speed pattern generating circuit 12b becomes smaller than the speed detection value by the speed detector 12c, the powering signal generating means is generated based on the output of the differential amplifier 12d. 12
The powering signal from f is cut and the braking signal generating means 12
g operates to generate a braking signal. At the same time when the powering signal is turned off, the driving element 2 is turned off and the door opening signal 11a is generated.
AND gate element 1 by the output of the inverter 13i for obtaining the inversion signal of
3c, the OR element 13e, the amplifier 14c, and the driving element 3 operate to brake. At this time, even if the door closing signal 11b is broken for some reason during the door closing braking, the door closing braking is performed based on the output of the inverter 13i that obtains the inverted signal of the door opening signal 11a. Therefore, the door closing braking operation can be continued without changing the door closing braking operation.

Therefore, according to the first embodiment, a braking logic circuit for forcibly outputting the braking signal when the braking signal is generated regardless of the abnormality of the door opening / closing signal while the door is opened or closed is provided, and The braking logic circuit is configured so that the logical product of the inversion signal of the door opening signal and the braking signal is used as the door closing braking signal, and the logical product of the inversion signal of the door closing signal and the braking signal is output as the door opening braking signal. By doing so, it is possible to perform the door opening braking operation and the door closing braking operation regardless of the door opening / closing signal. In particular, even if the door opening signal is turned off during the door opening braking, the reverse signal of the door closing signal and the braking operation are performed. The door open braking signal can be obtained by the logical product of the signal and the door open braking operation can be performed regardless of whether the door open signal is on or off. The door closing braking signal is obtained by the logical product of the inversion signal of the opening signal and the braking signal. On the door closing command to obtain, so that it is possible to perform independent door-closing braking operation off. With this, even when the door open / close signal is broken, the DC motor that drives the door can be immediately braked and stopped,
It can improve safety for users, prevent free operation when the door control function is stopped, and provide a fully open holding force like a linear door mechanism without requiring a special configuration. It can be applied to elevator doors that cannot be obtained and can be braked by the self-closing device so that the door does not close completely.

Example 2. Next, FIG. 2 is a block diagram showing a control device for elevator doors according to the second embodiment. In FIG. 2, the same parts as those in the first embodiment shown in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. As a new configuration, 13
k is an AND gate element that detects the simultaneous opening of the door opening signal 11a and the door closing signal 11b, 13l is an inverter element that gives its inverted signal, 13m is an AND that obtains the logical product of the door opening signal 11a and the output of the inverter element 13l Gate element,
13n is an AND gate element for obtaining a logical product of the door closing signal 11b and the output of the inverter element 13l, and 13o is a braking signal from the braking signal generating means 12g and the AND gate element 13
An OR gate element that obtains a logical sum with the output of k is shown. A braking logic circuit is constituted by these configurations and the configuration including AND gate elements 13c and 13d, OR gate elements 13e and 13f, and inverter elements 13i and 13j similar to those in the first embodiment, and the door opening signal 11a and the door closing signal are formed. When 11b and 11b are simultaneously turned on, the door opening / closing signal is forcibly turned off and a braking signal is output.

Next, the operation of the above configuration will be described. First, in the door opening operation, power is supplied from the (+) side of the power supply device 1 in the same manner as in the first embodiment, and the driving element 5,
A current flows through the DC motor 10 and the drive element 3 to the (−) side of the power supply device 1, and the DC motor 10 is rotating. At this time, when the door is opened, the drive element 5 is continuously turned on based on the output of the amplifier 14a, while the drive element 3 is switched by the amplifier 14e based on the output of the PWM generation circuit 12e to detect the speed command value and the speed. The pulse width is controlled according to the deviation from the value to gradually accelerate. After that, when the speed of the DC motor 10 reaches the speed command value and the deviation becomes small, the ON time of switching is shortened, the current flowing through the DC motor 10 is reduced, and the DC motor 10 is rotated at a constant speed. Next, when the door reaches the deceleration point, the braking operation is started.

Then, at the time of door opening braking, that is, when the speed command value from the speed pattern generating circuit 12b becomes smaller than the speed detection value by the speed detector 12c, the power running signal generating means is generated based on the output of the differential amplifier 12d. 12
The powering signal from f is cut and the braking signal generating means 12
g operates to generate a braking signal. At the same time when the powering signal is turned off, the drive element 5 is turned off and the door opening signal 11a is generated.
And the door close signal 11b are not simultaneously ON, the output of the AND gate element 13k for obtaining the logical product of the door open signal 11a and the door close signal 11b is at the low level, and the output of the inverter element 13l is at the high level. AND gate element 1
3n is at a low level and the inverter element 13j is at a high level, so that the OR gate element 13o is at a high level by the braking signal from the braking signal generating means 12g, and AN
D gate element 13d, OR gate element 13f, amplifier 1
4d, the drive element 4 is operated and braking is applied. At this time, the inverter 13 that obtains the inverted signal of the door closing signal 11b even if the door opening signal 11a is broken for some reason
The door opening braking operation can be continued without changing the door opening braking operation based on the output of j. Also, during door opening braking,
When the door open signal 11a and the door close signal 11b are turned on at the same time, the output of the AND gate element 13k is high level, the output of the inverter element 13l is low level, AND
The outputs of the gate elements 13m and 13n are low level, the outputs of the inverters 13i and 13j are high level, and A
The outputs of the ND gate elements 13c and 13d become high level, and as a result, the amplifiers 14c and 14d operate via the OR gate elements 13e and 13f to drive the driving elements 3 and 4 and apply braking.

Next, at the time of the door closing operation, power is supplied from the (+) side of the power source device 1 through the drive element 2, the DC motor 10 and the drive element 4 in the same manner as in the first embodiment. Current flows toward the −) side, and the DC motor 10 rotates in the direction opposite to the door opening direction. At this time, the door opening starts
While continuously controlling the drive element 2 based on the output of the amplifier 14b, the drive element 4 is switched by the amplifier 14d based on the output of the PWM generation circuit 12e, and pulsed according to the deviation between the speed command value and the speed detection value. Control the width and gradually accelerate. After that, when the speed of the DC motor 10 reaches the speed command value and the deviation becomes small, the ON time of switching is shortened, the current flowing through the DC motor 10 is reduced, and the DC motor 10 is rotated at a constant speed. Next, when the door reaches the deceleration point, the braking operation is started.

When the door is closed, that is, when the speed command value from the speed pattern generating circuit 12b becomes smaller than the speed detection value by the speed detector 12c, the power running signal generating means is output based on the output of the differential amplifier 12d. 12
The powering signal from f is cut and the braking signal generating means 12
g operates to generate a braking signal. At the same time when the powering signal is turned off, the driving element 2 is turned off and the door opening signal 11a is generated.
When the door closing signal 11b and the door closing signal 11b are not simultaneously ON, the output of the AND gate element 13k for obtaining the logical product of the door opening signal 11a and the door closing signal 11b is at the low level, and the output of the inverter element 13l is at the high level. . Since the AND gate element 13m becomes low level and the inverter element 13i becomes high level, the OR gate element 13o becomes high level by the braking signal from the braking signal generating means 12g, and the AND gate element 13c, the OR gate element 13e,
The amplifier 14c and the driving element 3 are operated and braking is applied.
At this time, even if the door closing signal 11b is disconnected due to some cause, the door closing braking operation does not change based on the output of the inverter 13i that obtains the inverted signal of the door opening signal 11a, and the door closing braking operation is performed. I can continue. Further, when the door opening signal 11a and the door closing signal 11b are simultaneously turned on during the door closing braking, the output of the AND gate element 13k is high level, the output of the inverter element 13l is low level, A
The outputs of the ND gate elements 13m and 13n are low level,
The outputs of the inverters 13i and 13j are at a high level, the outputs of the AND gate elements 13c and 13d are at a high level, and as a result, the amplifiers 14c and 14d operate via the OR gate elements 13e and 13f to drive the drive elements 3 and 4. And brake.

Therefore, according to the second embodiment, the braking logic circuit forcibly turns off the door opening / closing signal and outputs the braking signal when the door opening signal and the door closing signal are simultaneously turned on. With this configuration, even if the door open / close signals are simultaneously turned on during the door open / close operation, the DC motor that drives the door can be immediately braked to stop the door, and the door is closed by the self-closing force. It is possible to prevent it from being fully closed.

Example 3. Next, FIG. 3 is a block diagram showing a control device for elevator doors according to a third embodiment. In FIG. 3, the same parts as those of the first and second embodiments shown in FIGS. 1 and 2 are designated by the same reference numerals, and the description thereof will be omitted. As a new configuration, 13p indicates a NOR element that detects simultaneous off of the door opening signal 11a and the door closing signal 11b, and this NOR element 13p and the AND gate element 13 similar to the first and second embodiments.
c and 13d, OR gate elements 13e and 13f, inverter elements 13i and 13j, and OR gate element 13o constitute a braking logic circuit, and a door open signal 1
When 1a and the door closing signal 11b are turned off at the same time,
It is configured to forcibly output the braking signal.

Next, the operation of the above configuration will be described. First, in the door opening operation, power is supplied from the (+) side of the power supply device 1 in the same manner as in the first embodiment, and the driving element 5,
A current flows through the DC motor 10 and the drive element 3 to the (−) side of the power supply device 1, and the DC motor 10 is rotating. At this time, when the door is opened, the drive element 5 is continuously turned on based on the output of the amplifier 14a, while the drive element 3 is switched by the amplifier 14e based on the output of the PWM generation circuit 12e to detect the speed command value and the speed. The pulse width is controlled according to the deviation from the value to gradually accelerate. After that, when the speed of the DC motor 10 reaches the speed command value and the deviation becomes small, the ON time of switching is shortened, the current flowing through the DC motor 10 is reduced, and the DC motor 10 is rotated at a constant speed. Next, when the door reaches the deceleration point, the braking operation is started.

Then, at the time of door opening braking, that is, when the speed command value from the speed pattern generating circuit 12b becomes smaller than the speed detected value by the speed detector 12c, the power running signal generating means is generated based on the output of the differential amplifier 12d. 12
The powering signal from f is cut and the braking signal generating means 12
g operates to generate a braking signal. At the same time when the powering signal is turned off, the drive element 5 is turned off and the door opening signal 11a is generated.
When the door closing signal 11b and the door closing signal 11b are not simultaneously OFF, NOR is obtained to obtain the logical sum of the door opening signal 11a and the door closing signal 11b.
The output of the gate element 13p is at low level, the OR gate element 13o becomes high level by the braking signal from the braking signal generating means 12g, and the output of the inverter element 13j which obtains the inverted signal of the door closing signal 11b causes the AND gate element. 13d, OR gate element 13f, amplifier 14d,
The drive element 4 operates and braking is applied. At this time, even if the door opening signal 11a is broken for some reason, the door opening braking operation is not changed based on the output of the inverter 13j that obtains the inverted signal of the door closing signal 11b. I can continue. Also, during door-open braking, door-open signal 1
When 1a and the door closing signal 11b are turned off at the same time, the outputs of the inverters 13i and 13j are at the high level, and the output of the NOR gate element 13p is at the high level, the AND gate elements 13c and 13c.
The output of d becomes high level, and as a result, the amplifiers 14c and 14d operate via the OR gate elements 13e and 13f to drive the driving elements 3 and 4 and apply braking.

Next, during the door closing operation, power is supplied from the (+) side of the power supply device 1 through the drive element 2, the DC motor 10, and the drive element 4 in the same manner as in the first embodiment. Current flows toward the −) side, and the DC motor 10 rotates in the direction opposite to the door opening direction. At this time, the door opening starts
While continuously controlling the drive element 2 based on the output of the amplifier 14b, the drive element 4 is switched by the amplifier 14d based on the output of the PWM generation circuit 12e, and pulsed according to the deviation between the speed command value and the speed detection value. Control the width and gradually accelerate. After that, when the speed of the DC motor 10 reaches the speed command value and the deviation becomes small, the ON time of switching is shortened, the current flowing through the DC motor 10 is reduced, and the DC motor 10 is rotated at a constant speed. Next, when the door reaches the deceleration point, the braking operation is started.

Then, when the door is closed, that is, when the speed command value from the speed pattern generating circuit 12b becomes smaller than the speed detection value by the speed detector 12c, the power running signal generating means is generated based on the output of the differential amplifier 12d. 12
The powering signal from f is cut and the braking signal generating means 12
g operates to generate a braking signal. At the same time when the powering signal is turned off, the driving element 2 is turned off and the door opening signal 11a is generated.
If the door close signal 11b and the door close signal 11b are not simultaneously OFF, N
The output of the OR gate element 13p is at a low level, and the OR gate element 13o is at a high level by the braking signal from the braking signal generating means 12g, and the AND gate element 13 is turned on.
c, OR gate element 13e, amplifier 14c, drive element 3
Is activated and braking is applied. At this time, door closing signal 11b
Even if the wire breaks for some reason, the door open signal 11
The door closing braking operation can be continued without causing a change in the door closing braking operation based on the output of the inverter 13i that obtains the inverted signal of a. Further, when the door open signal 11a and the door close signal 11b are simultaneously turned off during the door close braking, NOR is performed.
The output of the gate element 13p becomes high level, the output of the OR gate element 13o becomes high level, and the inverter 1
Since the outputs of 3i and 13j are high level, AND
The outputs of the gate elements 13c and 13d become high level, as a result, the amplifiers 14c and 14d operate via the OR gate elements 13e and 13f, and the driving elements 3 and 4 are driven.
To drive and brake.

Therefore, according to the third embodiment, the braking logic circuit is configured to forcibly output the braking signal when the NOR element 13p detects simultaneous OFF of the door opening / closing signal. Even if it is turned off, the DC motor that drives the door can be immediately braked to stop the door, improving the safety for the user.
It is possible to prevent the door from being fully closed by the self-closing force of the door.

Example 4. Next, FIG. 4 is a block configuration diagram showing a control device for elevator doors according to a fourth embodiment. 4, the same parts as those in the conventional example shown in FIG. 9 are designated by the same reference numerals, and the description thereof will be omitted. As a new code, 20 is a contact point that is dropped out when the AC power supply 1e is cut off.
0a and 20b are closed and contacts 20c and 20d
The relays 21a and 21b for opening the switch are connected to the gate terminals of the driving elements 3 and 4 which are operated during braking when the power is cut off during the door opening / closing operation, and the driving elements 3 and 4 are turned on to perform the braking operation. Shows a storage battery for. By the contacts 20a to 20d and the storage batteries 21a and 21b, the drive elements 3 and 4 are separated from the drive command generating means 14 side when the power is cut off during the door opening / closing operation, and the drive elements 3
The self-excited DC motor 1 for driving the door by connecting the storage batteries 21a and 21b to the gate terminals of 4 and 4 and turning on the driving elements 3 and 4 to perform the braking operation.
The braking switching means for immediately applying a braking force to 0 and stopping the door is configured.

The elevator door control apparatus according to the fourth embodiment performs the door opening operation and the door closing operation in the same manner as the conventional example. However, when the AC power supply 1e is shut off during the door opening and closing operation, Relay 20 drops out, contact 20c,
20d opens and disconnects the drive elements 3 and 4 operating during braking from the amplifiers 14c and 14d, and the contacts 20a and 20b close to supply the DC power from the storage batteries 21a and 21b to the gate terminals of the drive elements 3 and 4. Then, the drive elements 3 and 4 are turned on, and the generated energy generated by the rotation of the self-excited DC motor 10 is used to perform the braking operation. The polarity of the generated voltage generated by the rotation of the self-excited DC motor 10 varies depending on the rotation direction, and the current path during braking is the self-excited DC motor 10, the drive element 4, the rectifying element 7, and the self-excited DC motor 10 Or the closed circuit of the self-excited DC motor 10, the drive element 3, the rectifying element 8 and the self-excited DC motor 10.

Therefore, according to the fourth embodiment, when the power supply is cut off, the relay 20 detects this and disconnects the drive elements 3 and 4 which operate during braking from the drive command generating means 14 side, and at the same time, the drive element 3 Since the storage batteries 21a and 21b are connected to the gate terminals of 4 and 4 and the driving element thereof is turned on, the self-excited DC motor 1 that drives the door even if the power supply device is shut off during the door opening / closing operation.
It is possible to immediately apply the brake to 0 and stop the door to improve the safety for the user, and it is possible to prevent the door from being fully closed by the self-closing force of the door.

Example 5. Next, FIG. 5 is a block diagram showing a control device for elevator doors according to a fifth embodiment. 5, the same parts as those in the fourth embodiment shown in FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted. 22 as a new code
Reference numerals a and 22b denote rectifying elements, which are contact elements 20a to 20d of the relay 20 that drop out when the AC power source 1e is cut off and the rectifying elements 22a and 22b, and drive elements 3 and 4 when the power is cut off during the door opening / closing operation. Is separated from the drive command generating means 14 side, the drive elements 3 and 4 are turned on to perform the braking operation, and the self-excited DC motor 10 for driving the door is immediately braked to stop the door. It is designed to make up.

The elevator door control apparatus according to the fifth embodiment performs the door opening operation and the door closing operation in the same manner as the conventional example. However, if the AC power supply 1e is shut off during the door opening and closing operation, The relay 20 drops out, the contacts 20c and 20d are opened, and the driving elements 3 and 4 which operate during braking are disconnected from the amplifiers 14c and 14d, and the contacts 20a are
And 20b are closed, and the self-excited DC motor 1 is connected to the gate terminals of the driving elements 3 and 4 via the rectifying element 22a or 22b.
The generated voltage generated by the rotation of 0 is supplied to turn on the drive elements 3 and 4 to perform the braking operation. The generated voltage generated by the rotation of the self-excited DC motor 10 has different polarities depending on the rotation direction. However, even if the rectifying elements 22a or 22b have different polarities, the driving elements 3 and 4 can be turned on to perform the braking operation. Further, the current path during braking is the closed circuit of the self-excited DC motor 10, the drive element 4, the rectifying element 7, and the self-excited DC motor 10, or the self-excited DC motor 10,
It flows through the closed circuit of the drive element 3, the rectifying element 8 and the self-excited DC motor 10.

Therefore, according to the fifth embodiment, when the power is cut off, the relay 20 detects this and disconnects the drive elements 3 and 4 which operate during braking from the drive command generating means 14 side, and at the same time, the drive element 3 Since the generated electric power of the self-excited DC motor 10 is supplied to the gate terminals of 4 and 4 to be turned on, the self-excited DC motor 10 that drives the door even when the power supply device is cut off during the door opening / closing operation. Immediate braking can be applied to stop the door to improve safety for the user, and it is possible to prevent the door from being fully closed due to the self-closing force of the door.

Example 6. Next, FIG. 6 is a block diagram showing a control device for elevator doors according to a sixth embodiment. 6, the same reference numerals as those of the fourth embodiment shown in FIG. 4 indicate the same parts, 20 is a relay connected to the AC power supply 1e, and 20
Reference numeral a denotes a contact of the relay 20, which is connected to both ends of the armature of the DC motor 10 and constitutes a switching unit during braking so as to be closed when the relay 20 drops out.

With the above construction, the door opening operation and the door closing operation are performed in the same manner as in the conventional example. However, if the AC power supply 1e is shut off during the door opening / closing operation, the relay 20 drops. Since the contact 20a is turned off and the contact 20a is closed, both ends of the DC motor 10 are short-circuited, and when the DC motor 10 rotates, a braking operation is performed.

Therefore, according to the sixth embodiment, the braking switching means is configured to short-circuit both ends of the armature of the DC motor 10 based on the relay 20 and its contact 20a that drop out when the AC power supply 1e is shut off. Thus, during the door opening / closing operation, even if the power is cut off, the DC motor 10 that drives the door can be immediately braked to stop the door and the safety for the user can be improved, and the door can be closed automatically. It is possible to prevent the door from being fully closed by force.

Example 7. Next, FIG. 7 is a block diagram showing a control device for elevator doors according to a seventh embodiment. In FIG. 7, the same reference numerals as those of the fourth embodiment shown in FIG. 4 denote the same parts, 20 is a relay connected to the AC power supply 1e, and 20
Reference numeral a denotes a contact of the relay 20, which is connected so as to short-circuit both ends of the DC power supply line, and constitutes a closed circuit when braking the relay 20 so that the relay 20 is closed.

With the above construction, the door opening operation and the door closing operation are performed in the same manner as the conventional example. However, when the AC power supply 1e is shut off during the door opening / closing operation, the relay 20 drops. Since it is turned off and the contact 20a is closed, both ends of the DC power supply line are short-circuited, and when the DC motor 10 rotates, a braking operation is performed. That is, when the contact 20a is closed and the motor rotates, the rectifying element 7, the DC motor 10, the rectifying element 9, the contact 20a and the closed circuit of the rectifying element 7 or the rectifying element 8, the DC motor 10, the rectifying element 6, the contact. A current flows through the closed circuit of 20a and the rectifying element 8 to perform the braking operation.

Therefore, according to the seventh embodiment, the braking switching means is configured to short-circuit both ends of the power supply line based on the relay 20 and its contact 20a which drop out when the AC power supply 1e is shut off. During the door opening / closing operation, even if the power is cut off, the direct current motor 10 that drives the door is immediately braked to stop the door and prevent the user from hitting it, thereby eliminating the danger to the user and ensuring safety. It is also possible to prevent the door from being fully closed by the self-closing force of the door.

Example 8. Next, FIG. 8 is a block diagram showing a control device for elevator doors according to the eighth embodiment. 8, the same reference numerals as those of the seventh embodiment shown in FIG. 7 indicate the same parts, and the description thereof will be omitted. 23 as a new code
Is a switch of braking time switching means provided between both ends of the DC power supply line together with the contact 20a of the relay 20, and is operated to open the short-circuited braking circuit of the seventh embodiment at the time of elevator maintenance.

By virtue of the above configuration, the seventh embodiment
Similarly, the braking operation can be performed, and even if the door is manually moved, it does not move easily. In this case, the switch 2
By disconnecting the braking circuit short-circuited by the operation of 3, the braking operation can be turned off, and the maintenance work can be easily performed. In the sixth embodiment as well, the same effect can be expected by providing the switch 20 together with the contact 20a between both ends of the armature of the DC motor 10.

Therefore, according to the eighth embodiment, since the switch 23 for opening the braking circuit that is short-circuited on the basis of the detection of the power interruption by the relay 20 is provided as the braking switching means, the elevator maintenance is performed when the power is interrupted. Work can be facilitated.

[0076]

As described above, according to the present invention, the control means for driving and controlling the drive elements of the drive means on the basis of the opening / closing signal of the elevator door generates the braking signal during the opening or closing of the door. In this case, by providing the braking logic circuit that forcibly outputs the braking signal regardless of the abnormality of the door opening / closing signal, it is possible to perform the door opening braking operation and the door closing braking operation regardless of the door opening / closing signal. With this, when a braking signal is generated even when the door opening / closing signal is broken, the DC motor that drives the door can be immediately braked and stopped, and the DC motor can be prevented from becoming a free operation. There is an effect that danger can be eliminated and safety can be improved, and that the door can be prevented from being fully closed by the self-closing force of the door.

Further, according to the present invention, the braking logic circuit sets the logical product of the inversion signal of the door opening signal and the braking signal as the door closing braking signal, and the logic of the inversion signal of the door closing signal and the braking signal. By outputting the product as the door opening braking signal, even if the door opening signal is turned off during the door opening braking, the door opening braking signal is obtained by the logical product of the inversion signal of the door closing signal and the braking signal. The door opening braking operation can be performed regardless of whether the door opening signal is ON or OFF, and even if the door closing signal is turned OFF during door closing braking, the logical product of the inverted signal of the door opening signal and the braking signal. The door closing braking signal can be obtained by performing the door closing braking operation regardless of whether the door closing signal is ON or OFF.This allows the DC motor that drives the door to immediately brake even when the door opening and closing signal is disconnected. Safety for users by preventing free operation after stopping Can be improved, also, there is an effect that it is possible to prevent the fully closed is door by door of the self closing force.

Further, according to the present invention, the braking logic circuit is configured to forcibly turn off the door opening / closing signal and output the braking signal when the door opening signal and the door closing signal are simultaneously turned on. With this configuration, even if the door open / close signals are turned on at the same time during the door open / close operation, the DC motor that drives the door can be immediately braked to stop the door, and the DC motor that controls the door will operate abnormally. Can be prevented, the danger to the user can be eliminated and the safety can be improved.
There is an effect that it is possible to prevent the door from being fully closed by the self-closing force of the door.

Further, according to the present invention, the braking logic circuit is configured to forcibly output the braking signal when the door opening signal and the door closing signal are simultaneously turned off. Even if both are turned off at the same time, the DC motor that drives the door can be braked to stop the door, prevent the motor that controls the door from operating abnormally, and eliminate the danger to the user. It is possible to improve safety and prevent the door from being fully closed due to the self-closing force of the door.

Further, according to the present invention, a self-exciting DC motor for driving an elevator door, a power supply device for supplying DC power to the self-exciting DC motor, and a drive of a full bridge structure in which rectifying elements are connected in antiparallel. In a control device for an elevator door, which includes a drive means having an element for reversibly controlling the rotation of the self-excited DC motor, and a control means for driving and controlling each drive element of the drive means based on an opening / closing command of the elevator door. Detecting means for detecting interruption of the power supply device,
The self-excited DC motor that drives the door even when the power supply device is shut off during the door opening / closing operation by providing the braking-time switching means for braking the self-excited DC motor based on the detection signal from the detection means. It is possible to brake the vehicle and stop the door to improve the safety for the user, and it is possible to prevent the door from being fully closed due to the self-closing force of the door.

Further, according to the present invention, as the braking switching means, a storage battery for supplying a DC power source is provided, and the drive element that operates during braking based on the detection signal from the detection means is disconnected from the control means. By connecting the storage battery to the control electrode terminal of the drive element to turn on the drive element, the self-excited DC motor that drives the door immediately after the power supply is cut off during the door opening / closing operation Braking is applied to prevent abnormal operation,
There is an effect that the safety to the user can be improved and the door can be prevented from being fully closed by the self-closing force of the door.

Further, according to the present invention, as the braking time switching means, the drive element that operates during braking based on the detection signal from the detection means is separated from the control means, and the control electrode terminal of the drive element is connected to the above. By supplying the generated power of the self-excited DC motor to turn on its drive element, the door can be driven even if the power supply is cut off during the door opening / closing operation without requiring a special power source. The self-excited DC motor can be immediately braked to prevent abnormal operation and improve user safety, and also prevent the door from fully closing due to the self-closing force. There is an effect that can be done.

Further, according to the present invention, the braking-time switching means is configured so that both ends of the armature of the self-excited DC motor are short-circuited on the basis of the detection signal from the detection means. It can be braked by the electric current generated by rotation, and without requiring a special power supply, the self-excited DC motor that drives the door will be immediately braked and stopped when the power is cut off during the door opening / closing operation. Therefore, there is an effect that it is possible to prevent the user from hitting it, improve safety, and prevent the door from being fully closed by the self-closing force of the door.

Further, according to the present invention, the braking switching means is configured to short-circuit both ends of the power supply line based on the detection signal from the detection means.
The generated electric current generated by the rotation of the self-excited DC motor can be used for braking, and no special power supply is required. It is possible to improve the safety by braking and stopping the door so that it does not hit the user, and it is possible to prevent the door from fully closing due to the self-closing force of the door. is there.

Further, according to the present invention, as the braking switching means, the operation switch for opening the short circuit which is short-circuited based on the detection signal from the detection means is provided, so that the elevator maintenance work can be performed when the power is cut off. The effect is that it can be made easier.

[Brief description of drawings]

FIG. 1 is a block configuration diagram showing a control device for elevator doors according to a first embodiment of the present invention.

FIG. 2 is a block configuration diagram showing a control device for elevator doors according to a second embodiment of the present invention.

FIG. 3 is a block configuration diagram showing an elevator door control device according to a third embodiment of the present invention.

FIG. 4 is a block configuration diagram showing a control device for elevator doors according to a fourth embodiment of the present invention.

FIG. 5 is a block configuration diagram showing a control device for elevator doors according to a fifth embodiment of the present invention.

FIG. 6 is a block configuration diagram showing a control device for elevator doors according to a sixth embodiment of the present invention.

FIG. 7 is a block diagram showing a control device for elevator doors according to a seventh embodiment of the present invention.

FIG. 8 is a block configuration diagram showing a control device for elevator doors according to an eighth embodiment of the present invention.

FIG. 9 is a block configuration diagram showing a control device for an elevator door according to a conventional example.

FIG. 10 is a waveform diagram for explaining the operation of FIG.

[Explanation of symbols]

1 DC power supply device, 1a to 1d rectifying element, 1e AC power supply, 1f smoothing capacitor, 2 to 5 driving element, 6 to
9 rectifying element, 10 self-excited DC motor, 11 elevator control panel, 11a door open signal, 11b door close signal, 1
2 speed control device, 12f powering signal generating means, 12g
Braking signal generating means, 13 logic circuits, 13a to 13
d, 13k, 13m, 13n AND gate element, 13
e, 13f, 13o OR gate element, 13g to 13
j, 13l inverter element, 14 drive command generating means, 14a to 14d amplifier, 20 relay, 20a to
20d contact, 21a, 21b storage battery, 22a, 22
b Rectifying element, 23 switch.

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 15, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

Reference numeral 13 indicates a logic circuit having a powering logic circuit and a braking logic circuit. This logic circuit 13
AND gate element 13a for obtaining a door opening power running signal by logical product of the output of the inverter element 13g which outputs the inverted signal of the door open signal 11a and the door close signal 11b and the power running signal from the power running signal generating means 12f, and the door close Inverter element 13 that outputs an inverted signal of signal 11b and door opening signal 11a
An AND gate element 13b for obtaining a door closing power running signal by a logical product of the output of h and the power running signal from the power running signal generating means 12f, and 19 are the door closing signal 11b and the braking signal from the braking signal generating means 12g. An AND gate element 13c for obtaining a door closing braking signal based on the AND gate element 13d for obtaining a door opening braking signal based on the door opening signal 11a and the braking signal from the braking signal generating means 12g, and a door opening force running signal. OR gate element 13e for synthesizing a door closing braking signal
And an OR gate element 13f for synthesizing the door closing power running signal and the door opening braking signal. The AND gate elements 13a and 13b and the inverter elements 13g and 13h form a powering logic circuit, and the AND gate elements 13c and 13d and the OR gate elements 13e and 13f form a braking logic circuit.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

Further, reference numeral 14 denotes a drive command generation circuit which outputs a drive command to the drive elements 2 to 5 based on the output from the logic circuit 13. The drive command generation circuit 14 includes an amplifier 14a for driving the drive element 5 by the output of the AND gate element 13a and an AND gate element 1
An amplifier 14 for driving the driving element 2 by the output of 3b
b, an amplifier 14c for driving the drive element 3 based on the output of the OR gate element 13e and the output from the PWM generation circuit 12e, the output of the OR gate element 13f , and the PW.
An amplifier 14d for driving the drive element 4 based on the output from the M generation circuit 12e. A drive circuit 2 for driving the drive means is driven based on an open / close signal of the elevator door by a logic circuit 13 for inputting a door open signal and a door close signal from the speed control device 12 and the elevator control panel 11 and a drive command generating means 14. It constitutes a control means for controlling.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

As a result, power is supplied from the (+) side of the power supply device 1, and a current flows to the (-) side of the power supply device 1 through the drive element 5, the DC motor 10 and the drive element 3, and the DC motor 10 is Rotate. At this time, when the door is opened, the drive element 5 is continuously turned on based on the output of the amplifier 14a, while the drive element 3 is set to the output of the PWM generation circuit 12e as shown in FIGS. Based on amplifier 1
The switching operation is performed by 4c, and the pulse width is controlled according to the deviation between the speed command value and the speed detection value to gradually accelerate. After that, when the speed of the DC motor 10 reaches the speed command value and the deviation becomes small, the ON time of switching is shortened, the current flowing through the DC motor 10 is reduced, and the DC motor 10 is rotated at a constant speed. Next, when the door reaches the deceleration point, the braking operation is started.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

Here, the powering signal generating means 12f includes a door opening / closing signal, a speed instruction signal of a speed instruction generating circuit 12b corresponding to the door position, and a speed signal obtained from a speed detector 12c attached to the DC motor 10. When the speed command signal is large, the deviation amplifier 12d for comparing the values with and operates the powering signal generation means 12f and controls the PWM generation circuit 12e according to the deviation to change the switching time to change the acceleration. . On the contrary, in the braking signal generating means, when the speed signal obtained from the speed detector 12c is large, the powering signal is turned off and the braking signal is output. Similar to the power running operation, the switching time is changed according to the deviation to change the deceleration.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

As a result, power is supplied from the (+) side of the power supply device 1, and a current flows to the (-) side of the power supply device 1 through the drive element 2, the DC motor 10, and the drive element 4, and the DC motor 10 is It rotates in the direction opposite to the door opening direction. At this time, when the door is closed , the drive element 2 is continuously turned on based on the output of the amplifier 14b, while the drive element 4 is switched to the PWM generation circuit 12 as shown in FIGS.
A switching operation is performed by the amplifier 14d based on the output of e, and the pulse width is controlled according to the deviation between the speed command value and the speed detection value to gradually accelerate. Then, the DC motor 10
When the speed reaches the speed command value and the deviation becomes small, the ON time of switching is shortened, the current flowing through the DC motor 10 is reduced, and the DC motor 10 is rotated at a constant speed. Next, when the door reaches the deceleration point, the braking operation is started.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0040

[Correction method] Change

[Correction content]

Further, 14 is a drive command generation circuit for outputting a drive command to the drive elements 2 to 5 based on the output from the logic circuit 13. The drive command generation circuit 14 is
An amplifier 14a for driving the driving element 5 by the output of the ND gate element 13a, an amplifier 14b for driving the driving element 2 by the output of the AND gate element 13b , and an OR
An amplifier 14 for driving the drive element 3 based on the output of the gate element 13e and the output from the PWM generation circuit 12e.
c and an amplifier 14d for driving the drive element 4 based on the output of the OR gate element 13f and the output from the PWM generation circuit 12e, and a door opening signal from the speed control device 12 and the elevator control panel 11. The logic circuit 13 for inputting the door closing signal and the drive command generating means 14 constitute a control means for driving and controlling the drive elements 2 to 5 of the drive means based on the opening / closing signal of the elevator door.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0043

[Correction method] Change

[Correction content]

As a result, power is supplied from the (+) side of the power supply device 1, and a current flows through the drive element 5, the DC motor 10, and the drive element 3 to the (-) side of the power supply device 1, and the DC motor 10 is driven. Rotate. At this time, when the door is opened, the drive element 5 is continuously turned on based on the output of the amplifier 14a, while the drive element 3 is set to the output of the PWM generation circuit 12e as shown in FIGS. Based on amplifier 1
The switching operation is performed by 4c, and the pulse width is controlled according to the deviation between the speed command value and the speed detection value to gradually accelerate. After that, when the speed of the DC motor 10 reaches the speed command value and the deviation becomes small, the ON time of switching is shortened, the current flowing through the DC motor 10 is reduced, and the DC motor 10 is rotated at a constant speed. Next, when the door reaches the deceleration point, the braking operation is started.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0046

[Correction method] Change

[Correction content]

As a result, power is supplied from the (+) side of the power supply device 1, and current flows through the drive element 2, the DC motor 10 and the drive element 4 to the (-) side of the power supply device 1, and the DC motor 10 is driven. It rotates in the direction opposite to the door opening direction. At this time, when the door is closed , the drive element 2 is continuously turned on based on the output of the amplifier 14b, while the drive element 4 is switched to the PWM generation circuit 12 as shown in FIGS.
A switching operation is performed by the amplifier 14d based on the output of e, and the pulse width is controlled according to the deviation between the speed command value and the speed detection value to gradually accelerate. Then, the DC motor 10
When the speed reaches the speed command value and the deviation becomes small, the ON time of switching is shortened, the current flowing through the DC motor 10 is reduced, and the DC motor 10 is rotated at a constant speed. Next, when the door reaches the deceleration point, the braking operation is started.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0050

[Correction method] Change

[Correction content]

Next, the operation of the above configuration will be described. First, in the door opening operation, power is supplied from the (+) side of the power supply device 1 in the same manner as in the first embodiment, and the driving element 5,
A current flows through the DC motor 10 and the drive element 3 to the (−) side of the power supply device 1, and the DC motor 10 is rotating. At this time, when the door is opened, the drive element 5 is continuously turned on based on the output of the amplifier 14a, while the drive element 3 is switched by the amplifier 14c based on the output of the PWM generating circuit 12e to detect the speed command value and the speed. The pulse width is controlled according to the deviation from the value to gradually accelerate. After that, when the speed of the DC motor 10 reaches the speed command value and the deviation becomes small, the ON time of switching is shortened, the current flowing through the DC motor 10 is reduced, and the DC motor 10 is rotated at a constant speed. Next, when the door reaches the deceleration point, the braking operation is started.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0056

[Correction method] Change

[Correction content]

Next, the operation of the above configuration will be described. First, in the door opening operation, power is supplied from the (+) side of the power supply device 1 in the same manner as in the first embodiment, and the driving element 5,
A current flows through the DC motor 10 and the drive element 3 to the (−) side of the power supply device 1, and the DC motor 10 is rotating. At this time, when the door is opened, the drive element 5 is continuously turned on based on the output of the amplifier 14a, while the drive element 3 is switched by the amplifier 14c based on the output of the PWM generating circuit 12e to detect the speed command value and the speed. The pulse width is controlled according to the deviation from the value to gradually accelerate. After that, when the speed of the DC motor 10 reaches the speed command value and the deviation becomes small, the ON time of switching is shortened, the current flowing through the DC motor 10 is reduced, and the DC motor 10 is rotated at a constant speed. Next, when the door reaches the deceleration point, the braking operation is started.

[Procedure Amendment 11]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

[Procedure Amendment 12]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

Claims (10)

[Claims] 1. A direct current motor for driving an elevator door,
An elevator door provided with a drive means having a drive element of a full bridge structure for reversibly controlling the rotation of the DC motor, and a control means for drive-controlling each drive element of the drive means based on an opening / closing signal of the elevator door. In the above control device, the control means includes a braking logic circuit for forcibly outputting a braking signal based on a braking signal generated during opening or closing of the door regardless of an abnormality in the door opening / closing signal. Elevator door control device. 2. The braking logic circuit uses a logical product of an inversion signal of a door opening signal and a braking signal as a door closing braking signal, and
The elevator door control device according to claim 1, wherein a logical product of an inversion signal of the door closing signal and the braking signal is output as a door opening braking signal. 3. The braking logic circuit forcibly turns off the door opening / closing signal and outputs the braking signal when the door opening signal and the door closing signal are simultaneously turned on. Item 2. An elevator door control device according to item 1. 4. The elevator door control according to claim 1, wherein the braking logic circuit forcibly outputs the braking signal when the door open signal and the door close signal are simultaneously turned off. apparatus. 5. A self-excited DC motor for driving an elevator door, a power supply device for supplying DC power to the self-excited DC motor, and a drive element having a full-bridge structure in which rectifying elements are connected in antiparallel. In an elevator door control device comprising drive means for reversibly controlling the rotation of an excitation type DC motor and control means for driving and controlling each drive element of the drive means based on an opening / closing signal of the elevator door, shutting off the power supply device. A control device for an elevator door, comprising: a detection means for detecting the above-mentioned condition; and a braking-time switching means for performing a braking operation of the self-excited DC motor based on a detection signal from the detection means. 6. The braking-time switching means includes a storage battery for supplying a DC power source, disconnects a drive element that operates during braking based on a detection signal from the detection means from the control means, and controls electrodes of the drive element. The said storage battery is connected to a terminal and it carries out on operation | movement.
Elevator door control device described. 7. The braking-time switching means separates a drive element that operates during braking based on a detection signal from the detection means from the control means, and a control electrode terminal of the drive element generates power from the self-excited DC motor. The elevator door control device according to claim 5, wherein the elevator door control device is turned on by supplying electric power. 8. The control device for an elevator door according to claim 5, wherein the braking-time switching means short-circuits both ends of the armature of the self-excited DC motor during braking based on a detection signal from the detection means. . 9. The control apparatus for an elevator door according to claim 5, wherein the braking switching means short-circuits both ends of the power supply line during braking based on a detection signal from the detection means. 10. The control of an elevator door according to claim 8 or 9, wherein the braking-time switching means includes an operation switch for opening a short circuit that is short-circuited based on a detection signal from the detection means. apparatus.