JPH07110751B2 - Elevator door controls - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator door control device, and more particularly to an elevator door control device for preventing door opening outside a door zone.

[Prior art]

A schematic configuration of the elevator door opening / closing device will be described with reference to FIGS. 4 and 5. FIG. 4 is a front view of the car door device, and FIG. 5 is a schematic plan view showing the relationship between the car door and the landing door. In the figure, 1 is a double-door car door, which is a car room 2 (fifth
It is suspended by a hanger 3a so that it can be opened and closed, and the lower end is engaged with a sill 4 attached to the cab 2. Reference numeral 5 denotes a door machine installed on the cab 2, which is connected to a door motor 6, a pulley 8 connected to the door motor 6 via a belt 7 for reducing the rotation of the door motor 6, and a chain 9 connected to the pulley 8. This crank disk 10 is equipped with a crank disk 10 that is rotated.
The cage doors 1 are connected by an opening / closing link mechanism 11. 12 is an engagement device provided in the car door 1, which is used when opening and closing the door.
The opening and closing driving force is smoothly transmitted from the car side to the landing door side by being locked to the driving roller 14 attached to the landing door 13, and includes a fixed plate 12a and a movable plate 12b. Reference numeral 15 is a threshold for guiding the landing door 13. In the door opening / closing device having the above structure, when the car door 1 is fully closed, the movable plate 12b of the engagement device 12 is separated from the drive roller 14 as shown in FIG. Therefore, except when the door is opened and closed, the positional relationship between the engagement device 12 and the drive roller 14 is in the state shown in FIG. 5, and the car side can move up and down without interfering with the drive roller 14. When the car door 1 is opened from the fully closed state as the crank disk 10 of the door machine 5 is rotated, the movable plate 12b of the engagement device 12 is operated to grab the hall drive roller 14 and the door opening / closing power is applied. To the landing door 13 to open the landing door 13. At this time, the force required to open the door is as shown in FIG.
There is no door opening force more than the sum of the resistance force F 1 of the car door ₁ , the resistance force F _{2 of} the landing door 13 and the door closing force F ₃ by the closer that normally urges the landing door 13 in the closing direction. I can't open the door. Further, in the vicinity of the fully closed doors, the movable plate 12b of the engagement device 12 is not fully engaged with the driving roller of the landing door 13, but only F ₁ of the car side, fully engaged the movable plate After joining, the force required to open the door is F ₁ + F ₂ + F ₃ . As described above, when the engagement device 12 is engaged and when the engagement device 12 is not engaged, a difference in force corresponding to F ₂ + F ₃ for the landing door is generated between them. Also,
As for the inertial force acting on acceleration and deceleration, there is a difference in value proportional to the weight of the landing door. FIG. 7 is a control circuit of a conventional door opening / closing device. In the figure, 16 is a power supply circuit for driving the door motor 6, 17 is a drive circuit for controlling the power supplied to the door motor 6, and 18
Is a speed generator that is directly connected to the door motor 6 and generates a speed signal proportional to the rotation speed of the door motor 6, and 19 is a speed generator
An amplifier that amplifies the speed signal from 18 and outputs its output voltage V ₁
Are supplied to the differential amplifier 20. Reference numeral 21 is a speed command voltage generation circuit for driving the door motor in a predetermined speed pattern, and the speed command voltage Vp is the differential amplifier 20.
Further, the output voltage V ₂ of the differential amplifier 20 is input to the driving circuit 17 through the gate circuit 22. 23 is a door opening command signal generating circuit,
Fully closed position detection switch for landing doors and car doors (not shown)
The door opening / closing command signal V ₃ is transmitted based on the switch signal from the. When the door opening / closing command signal V ₃ is “H”, it is a door opening command, and when it is “L”, it is a door closing command. signal
V ₃ is supplied to the gate circuit 22. In the control circuit configured as described above, when the elevator car arrives at the destination floor and stops after a call is generated, the ON / OFF state of the switch for detecting the fully closed position of the landing door and the car door is signaled after a certain time. Check with the generation circuit 23,
When it is detected that both are off, the door open signal V ₃
= “H” is generated, the door side of the gate circuit 22 is gated, and the output voltage V ₂ of the differential amplifier 20 is supplied to the drive circuit 17,
As a result, the drive circuit 17 is operated to control the door motor 6 at a speed according to the speed pattern from the speed command voltage generation circuit 21. When the door motor 6 is activated, the fourth
The crank disk 10 and the link mechanism 11 shown in the figure operate to open the car door 1 and the landing door 13. Also, if only the position detection switch on the car side is turned off,
Immediately door opening and closing command signal V ₃ causes the door closing operation the drive circuit 17 becomes "L", the control circuit door-closing sequence mode.

[Problems to be Solved by the Invention]

In the conventional elevator door control device described above, the control panel,
Especially due to malfunction or failure of the door open / close command signal generation circuit,
When a door open signal is generated in a place where there is no landing door, that is, outside the door zone, the drive circuit 17 is controlled in the opening operation direction, and the car door 1 is opened outside the door zone, that is, between floors of the hoistway. There was a problem that it became dangerous and the safety of the elevator was impaired. The present invention has been made to solve the above problems, and even if the door open signal occurs outside the door zone due to a failure,
An object of the present invention is to provide an elevator door control device capable of preventing door opening outside the door zone and ensuring elevator safety.

[Means for Solving the Problems]

The elevator door control device of the present invention compares the deviation signal between the speed signal of the door motor and the speed command signal from the speed command generation circuit and the reference value for a certain period of time from the start of the door opening, so that the car door side is engaged with the landing door. When the deviation signal is below the reference value, it is determined that a door opening command signal is generated outside the door zone, and a hall non-engagement detection circuit that outputs a signal, and this hall non-engagement detection circuit A door opening signal blocking circuit for blocking a door opening command signal by an output signal from the engagement detection circuit and for generating a door closing command signal for the door control system.

[Action]

In the present invention, the hall disengagement detection circuit determines whether the engagement device on the car door side is engaged with the hall door side from the deviation signal of the door control system and the reference value, and the deviation signal is the reference. When it is determined that the value is less than or equal to the value, it is determined that the engagement device is not engaged on the landing door side and only the car door is open outside the door zone, and a blocking command is given to the door opening signal blocking circuit. The erroneously generated door opening command signal is inverted to the door closing command signal to close the car door that is starting to open. Therefore, according to the present invention, even if the door open command is erroneously generated, it is possible to prevent the car door from opening outside the door zone, and the safety of the elevator can be secured.

【Example】

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an entire door control circuit provided with a door control system according to the present invention, and the same parts as those in FIG. 7 are designated by the same reference numerals. In the figure, a power supply circuit 1 for supplying electric power to the door motor 6
6, a drive circuit 17 that controls the power supplied from the power supply circuit 16 to the door motor 6, and a speed generator 18 that extracts a signal proportional to the speed of the door motor 6, and an amplifier 19 that amplifies the speed signal, A differential amplifier 20 for extracting the difference between the output voltage V _{1 of} the speed command voltage generating circuit 21 and the amplifier 19 for setting the switching speed and the speed command voltage Vp from the speed command voltage generating circuit 12, and the differential amplifier 20 A gate circuit 22 that supplies the deviation output signal V ₂ to the drive circuit 17 and a door opening / closing command signal generation circuit 23 that controls the gate circuit 22 so that the drive circuit 17 operates in the door opening or door closing direction, and a differential circuit. amplifier
A hall disengagement detection circuit 24 for detecting disengagement of the engagement device from the output signal V _{2 of} 20 to the hall door is newly provided, and an opening / closing signal from the door opening / closing command signal generating circuit 23 to the gate circuit 22. The output system is provided with a door opening signal blocking circuit 25 that blocks a door opening signal generated when the control panel is broken down.The door opening signal blocking circuit 25 is controlled by a signal sent from the hall disengagement detection circuit 24. It is something. FIG. 2 is a specific circuit diagram of the hall disengagement detection circuit 24 and the door opening signal blocking circuit 25. In FIG. 2, the hall disengagement detection circuit 24 is an operational amplifier.
24a, whose inverting input terminal has a resistance from the input terminal Tin.
The output signal V ₂ of the differential amplifier 20 is input through 24b, and the reference voltage obtained by dividing the + V voltage by the variable resistor 24c and the resistor 24d is applied to the resistor 24e at the non-inverting input terminal. It is supposed to be input via. The output terminal of the operational amplifier 24a is a transistor via a resistor 24f.
The transistor 24g is connected to the base of 24g, the collector of the transistor 24g is connected to the + V power source through the resistor 24h, and the resistor 24i and the diode 24j are connected in parallel between the base and the emitter. In addition, a NAND gate is connected to the collector of the transistor 24g through a resistor 24k and an inverter 24l.
One input end of 24m is connected, and the position signal V ₅ is input to the other input end. The output terminal of the NAND gate 24m is connected to the base of the transistor 24o via the resistor 24n, the emitter thereof is connected to the + V power source, and the capacitor 24p is connected between the collector and the ground. In addition, at the connection point between the collector of the transistor 24o and the capacitor 24p, an inverter 24q, a resistor 24r and a diode 24s
Are connected to each other, and the reset signal "H" is input from the terminal T to the input terminal of the inverter 24q to discharge the electric charge of the capacitor 24p. The door open signal blocking circuit 25 includes a buffer gate 25a which receives the charging voltage of the capacitor 24p as an input, and the output terminal of the buffer gate 25a is connected to a transistor 25c through a resistor 25b.
Is connected to the base, the collector together with being connected to an output terminal Tout, the output signal V ₃ from the output said terminal Tout via a resistor 25d door opening and closing command signal generating circuit 23
Is entered. Also, the transistor 25
The emitter of c is grounded, and a resistor 25e is connected between this emitter and base. Next, the operation of this embodiment configured as described above will be described with reference to the waveform chart of FIG. First, in FIG. 3, (A) is a speed signal when the door is open.
The waveform of V ₁ , the figure (B) is the waveform of the output signal V ₂ of the differential amplifier 20 showing the difference signal between the speed signal V ₁ and the speed command signal Vp when the door is open, and the figure (C) is the door open At this time, the position signal V ₅ that generates a signal in a certain section “H” state after the engagement device engages with the landing door side
2D, the waveform of the output signal V ₆ of the operational amplifier 24a is shown in FIG. The differential signal of the differential amplifier 20 when the engagement device 12 shown in FIGS. 4 and 5 is engaged with the drive roller 14 of the landing door 13 to open both the car door and the landing door (gate circuit 22 (Actual command signal supplied to the drive circuit 17 through) is shown in FIG. 3 (B).
As shown by the solid line in FIG. 4, the speed command voltage Vp from the speed command voltage generation circuit 21 changes according to the acceleration, constant speed, and deceleration pattern, and thereby controls the drive circuit 17 to drive the door motor 6 to drive the car. Open the door and the landing door. Further, when the difference signal V ₂ having the waveform shown by the solid line in FIG. 3B is applied to the inverting input terminal of the operational amplifier 24a of the hall disengagement detection circuit 24, the difference signal V ₂ is not inverted by the operational amplifier 24a. Acceleration / constant speed zone with a higher level than the reference voltage applied to the input terminal (this can be changed by the variable resistor 24c)
In S1, the output signal V ₆ of the operational amplifier 24a is set to "L", the acceleration start point and deceleration (braking), the zone S2 "H", the output waveform shown by the solid line in FIG. 3 (D) Like Here, in the braking zone S2, the output of the operational amplifier 24a becomes "H", and accordingly, the transistor 24g is turned on,
Moreover, since the input of the inverter 24l becomes "L", its output becomes "H". However, since the position signal V _{5 is} also “L”, the output of the NAND gate 24m becomes “H” and the transistor 24o is held in the off state. Therefore, the capacitor 24p is not charged and its potential is the ground potential, so that the door open signal blocking circuit 25 is in the inoperative state. That is, since the output of the buffer gate 25a is set to "L", the transistor 25c is placed in the off state, thereby outputting the door opening and closing signal V ₃ directly to the output terminal Tout, and the
This is input to the gate circuit 22. However, when V ₃ is “H”, the door is open and when it is “L”, the door is closed. On the other hand, outside the door zone, the door open / close command signal generation circuit
A door open signal is generated due to a failure such as 23, and this is the gate circuit
When the drive circuit 17 operates by being supplied to the door motor 22 and the door motor 6 is driven, the door machine operates to open the door, but at this time, the elevator car is outside the door zone and the engaging device Is not engaged with the landing door side,
Only the car door will be opened. Therefore, the load torque applied to the door motor corresponds to the resistance F ₁ of the car door, and as a result, the difference signal V ₂ of the differential amplifier 20 has a waveform as shown by the broken line in FIG. 3 (B). . This difference signal
When V ₂ is applied to the operational amplifier 24a of the hall disengagement detection circuit 24, the voltage level thereof is lower than the reference voltage, so the output of the operational amplifier 24a is "H" as shown by the broken line in FIG. 3 (D).
Becomes Then, the transistor 24g is turned on, and the input of the inverter 24l becomes "H" accordingly, so that the output becomes "H", and this is added to one input end of the NAND gate 24m. When the position signal V ₅ shown in FIG. 3 (C) is input to the other input terminal during this period, the output of the NAND gate 24m becomes “L” for one period corresponding to the position signal V ₅ , so that the transistor 24n Turns on and charges the capacitor 24p to + V voltage. This causes the buffer gate 25a to operate,
Type "H" signal to the base of the transistor 25c, by turning the transistor 25c, dropping the door opening and closing signal V ₃ applied to the output terminal Tout to "L" (ground potential). That is, the door opening signal blocking circuit 25 is operated to block the door opening signal (“H”) generated by the failure from being output to the gate circuit 22, and at the same time, the door opening and closing signal V ₃ is inverted to “L”. Then, the door is closed. Therefore, the gate circuit 22 receiving the door closing command signal sets the drive circuit 17 to the door closing mode to close the car door which is about to open and prevent the car door from opening outside the door zone. To do. Since the input impedance of the buffer gate 25a is high, once the capacitor 24p is charged, the output "H" state of the buffer gate 25a due to this is held for a long time. When the reset signal “H” is input to the terminal T, the output of the inverter 24q is “L”.
Therefore, the charging charge of the capacitor 24p is
s, discharged through resistor 24r. In the above-described embodiment, the difference signal V _{2 of the} differential amplifier 20 is
In the landing disengagement detection circuit 24 is compared with the reference voltage for a certain period from the door opening start, and when the difference signal V ₂ is equal to or less than the reference voltage, the engagement device is not engaged on the landing door side, and the car outside the door zone Door open signal blocking circuit, judging that only the door is open
25, the door opening command signal generated by mistake is inverted to the door closing command signal to close the door motor drive circuit 17, so that the door opening and closing command signal generation circuit 23 such as outside the door zone. Even if the door open command signal is generated due to a failure, the car door does not open outside the door zone, and the safety of the elevator can be secured. The hall disengagement detection circuit 24 and the door opening signal blocking circuit 25 in the present invention are not limited to those having the circuit configuration shown in FIG.

【The invention's effect】

As described above, according to the present invention, whether the engagement device engages with the landing door by comparing the deviation signal during the door opening control by the speed command signal with the reference value for a predetermined time from the door opening start. When the deviation signal is less than the reference value, it is determined that the door open command signal is erroneously generated outside the door zone and the door open command signal is blocked and the door close command signal is generated. Therefore, even if the door opening command signal is generated outside the door zone due to a failure of the door opening / closing command signal generating circuit or the like, the car door can be prevented from opening outside the door zone, and the safety of the elevator can be secured.

[Brief description of drawings]

FIG. 1 is an overall block diagram showing an example of an elevator door control device of the present invention, FIG. 2 is a circuit diagram showing a concrete example of a hall disengagement detection circuit and a door opening signal blocking circuit in FIG. Figures (A) to (D) are output waveform diagrams for explaining each part,
FIG. 4 is a schematic front view of an elevator car door device, and FIG.
The figure is a schematic plan view of the main part showing the relationship between the car door and the landing door, Fig. 6 is an explanatory view showing the force required when the car door is opened by engaging with the landing door, and Fig. 7 is a conventional elevator door. It is a block diagram of a control device. 1 ... car door, 2 ... car room, 5 ... door machine, 6 ...
… Door motor, 12 …… Engagement device, 13 …… Landing door, 16 ……
Power supply circuit, 17 …… Drive circuit, 18 …… Speed generator, 19 ……
Speed signal amplifier, 20 ... Differential amplifier, 21 ... Speed command voltage generation circuit, 22 ... Gate circuit, 23 ... Door opening / closing command signal generation circuit, 24 ... Landing hall disengagement detection circuit, 25 ... Door Open signal blocking circuit. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A door control system for controlling opening and closing of a door motor based on a speed signal of a door motor and a speed command signal from a speed command generation circuit, wherein a deviation signal between the speed signal and the speed command signal and a reference value are opened. By comparing for a certain time from the start, it is determined whether the car door side is engaged with the landing door and when the deviation signal is below the reference value, it is determined that the door opening command signal is generated outside the door zone. A hall disengagement detection circuit that outputs a signal, and a door opening command signal that inhibits a door opening command signal by an output signal from the hall disengagement detection circuit and that generates a door opening command signal to the door control system A door control device for an erator including a circuit.