JPH02249884A - Elevator controller - Google Patents

Abstract

PURPOSE:To improve carriage efficiency by installing a means, detecting each portion of variations in machine room temperature, starting frequency or supply voltage and so on, another means setting the extent of overload exceeding the rated loadage conformed to this detected value, and a control means effectively operating an elevator as far as the set overload, respectively. CONSTITUTION:When temperature in a machine room is less than a specified value (for example, 10 deg.C) detected by a machine room temperature detector 20, output of an operational amplifier 21 comes to L, and an output signal of a NOT gate circuit 28 comes to H. In this state, if a travel signal (a) comes to H, a transistor 30 comes on, and an overload detecting relay 31 is energized with current, making operation possible to the extent of 110% of rated loadage. Next, whe the machine room temperature exceeds 10 deg.C, an output signal of the amplifier 21 is reversed to H, the transistor 30 is turned to OFF, and the relay is unenergized. Here, when the travel signal (a) comes to H, an output signal of an AND gate circuit 25 is reversed to H, a transistor 26 comes on, and an overload detecting relay 27 is energized, thereby making operation possible to the extent of 130% of the rated loadage.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an elevator control device, and particularly to an elevator S push device that increases operating efficiency in all travel directions.

[Conventional technology]

FIGS. 4 and 5 are circuit diagrams showing a conventional elevator control device disclosed, for example, in Japanese Patent Publication No. 61-31714. In the figure, reference numeral 1 denotes a hoisting machine installed in a machine room provided at the top of the hoistway, and includes a hoisting motor 2 and this hoisting motor! ! It is attached to the rotation output shaft of DJ machine 2,
A brake mechanism 3 that stops rotation, and this brake mechanism 3
#R is formed by a speed reducer 4 that decelerates the rotational output of the speed reducer 4, and a sheave 6 that is rotationally driven by the output shaft of the speed reducer 4 and runs the suspended main rope 5. 7 is a car connected to one end of the main rope 5, and 8 is a load detection device attached to the overload 7 to detect the load of the car 7. Here, the load detection device 8 is connected to a power source as shown in FIG.
Terminal 8a is connected to (+), and terminal 8b is electrically connected to terminal 8a when the detected load exceeds the rated live load as the first load point. Upper train! It has a terminal 8c that is electrically connected to the terminal 8a when a second load point, which is a load that generates a torque corresponding to the torque applied to rlIIa12 in the downward direction, is exceeded. This load detection device 8 has a terminal 8b and a voltage (-).
An overload detection relay 10 is connected between the terminal 8c and the power source (-) to constitute a first overload detection means, and an overload detection relay 11 is connected between the terminal 8c and the power supply (-). , constituting the second overload detection means. Further, in FIG. 1, reference numeral 9 denotes a counterweight connected to the other end of the main rope 5, and 12 a speed command signal generator for commanding the vertical speed of the heel 7. A speed command signal is output from the output terminal 12a. Output. 13 is an upward operation detection contact that is closed when the car 7 is operated in the upward direction; 14 is a downward operation detection contact that is closed when the car 7 is operated in the downward direction;
10a is a normally closed contact of the overload detection relay 10, and the speed command (No. 8 generator 1
2 and the input terminal 15a of the speed control device 15, thereby forming upward direction driving prevention means. lla is a normally closed contact of the overload detection relay 11, and is connected to the input terminal 15 of the speed command signal generator 12 and speed control device 15 via the downward operation detection device 14.
By being connected between the lower and the upper end of the lower end, a downward direction driving prevention means is constituted. 15c and 1.5d are speed control devices 1
The hoisting motor 2 constituting the hoisting 811 is connected between the terminals 15c and 1.5d. In the elevator control device configured in this way,
When the car 7 is operated with a load below the first load point, none of the overload detection relays 10[deg.]] is energized. Therefore, contact 1 of overload detection relay 10, 1.1
Both 0a and lla are in a closed state. Here, when the car 7 is operated in the upward direction, the upward operation detection contact 13 is closed, and the downward operation detection contact 14 remains open. As a result, the speed command signal generator 1
The speed command signal output from 2 is the upstream operation detection contact 1.
3. It is supplied to the speed control device 15 via the contact 10a and the input terminal 15a. In the speed control bag M15, the hoisting electric motor I! By driving the car 2, the upward traveling speed of the car 7 is controlled. Next, when the car 7 is operated in the downward direction with a load equal to or less than the first load point, the upward operation detection contact 13 is opened and the downward operation detection contact 14 is closed. When the downhill operation detection contact 14 is closed, the speed command signal output from the speed command signal generation bag M8 is transmitted to the speed control device 15 via the downhill operation detection contact 14 and the normally closed contact 11a of the overload detection relay 11. is supplied to the input terminal 1.5b of. In the speed control device 15, the downward running speed of the car 7 is controlled by driving the hoisting electric e-ketsu 2 according to the speed command signal supplied from the speed command signal generating device 12. This is normal elevator operation. Next, when the load detection device 8 detects that the load on the car 7 exceeds the first load point and is below the second load point, the load detection device 8 connects the input terminal 8a and the output terminal 8.
Since conduction is established between the two terminals b, the overload detection relay 10 is energized and its normally closed contact 10a is opened. Note that since the overload detection relay 11 is de-energized,
The normally closed contact 11a remains closed. Here, basket 7
When the is driven in the up direction, the up drive detection contact 13 is closed, but since the contact 10a is closed, the speed command signal generated by the speed command signal generator 12h is It is no longer supplied to the speed control device 15, and the upward operation of the car 7 is prevented. On the other hand, if the load on the car 7 exceeds the first load point and is below the second load point, Mf! ! Since the downhill operation detection contact 14 is closed when driving in the downhill direction, the speed command signal generated from the speed command signal generator 12 is transmitted through the downhill operation detection contact 14 and the contact 11a. By being supplied to the speed control device 15 via the car 7, the car 7 is operated in the downward direction while its speed is controlled. Next, when a load exceeding the first load point and further exceeding the second load point is applied to the car 7, the load detecting device 8 is connected between the input terminal 8a and the terminal 8b, and the input The terminal 8a and the terminal 80 are both electrically connected. As a result, both overload detection relays 10.11 are energized, so that their normally closed contacts 10a, 11a are both opened. Here, when the car 7 is operated in the upward direction, the upward operation detection contact 13 is closed, but since the contact 10a of the overload detection relay 10 is already open, the speed command signal generator The speed command signal generated from 12 is not supplied to speed control device 15. Car 7 is prevented from driving in the upward direction for the sake of car B. Further, when the car 7 is loaded with the above load and is operated in the downward direction, the downward operation detection contact 14 is closed, but since the contact 11a of the overload detection relay 11 is already open, The speed command signal generated from the speed command signal generator 12 is not supplied to the speed control device 15. For this reason, the car 7 is prevented from driving in the downward direction. In other words, if the load exceeds the second load point, operation in both the up and down directions will be inhibited. In this case, if the load of the car 7 is reduced to below the second load point, the overload detection relay 11 is deenergized and its contact 11a is closed, so that only the operation in the downward direction is possible. becomes possible. Furthermore, if the load on the car 7 is lower than the first load point, both up and down direction operation becomes possible.

[Problem to be solved by the invention]

Since the conventional elevator control device is configured as described above, the transportation efficiency for down-direction operation is improved. However, the capacity of the hoisting motor is determined so that the rated load can be increased in anticipation of a decrease in the efficiency of the hoist, the number of elevator starts per unit time, and a decrease in power supply voltage. Common. Therefore, when the hoisting machine efficiency is normal, the hoisting motor has sufficient capacity and can withstand considerable overload during its stay. This invention was made to solve the above-mentioned problems, and an object of the present invention is to provide an elevator control device that can improve the transport efficiency of the elevator not only in the downward direction but also in the upward direction. This is the purpose.

[Means to solve the problem]

The elevator control device according to the present invention has a machine room temperature,
means for detecting the number of starts or fluctuations in power supply voltage, etc., means for setting an overload exceeding a fixed RAM loading weight according to the detected value from this detection means, and effective operation of the elevator up to the set overload. A control means is provided.

[Effect]

In the elevator control device of the present invention, it is possible to board passengers up to an overload exceeding the rated loading capacity set by the overload setting means, and by allowing appropriate loading according to the capacity of the hoisting motor. , it is possible to improve transportation efficiency in both upstream and downstream operations.

【Example】

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 20 is a temperature detection device that detects the temperature of the machine room provided at the top of the hoistway and outputs a temperature detection signal having a level proportional to the detected temperature, and 21 is a positive output signal only. The temperature detection signal output from the temperature detection device 11 is used as a positive input. 22 to 24 are resistors that supply a reference voltage V' to the negative input terminal of the operational amplifier 21 by dividing the voltage of the power supply element V, and 25 is an ant game that calculates the logical product of the output signal of the operational amplifier jiij 21 and the running signal a. 1.Circuit 26 is a transistor that is turned on by the output signal of Antoge 1.Circuit 25, and a first overload detection relay 27 is connected between its collector and power supply terminal 2. The first overload detection relay 27 enables operation for a load up to 130% of the rated load. 28 is a not gate path for inverting the output signal of the operational amplifier 21, and 29 is a not gate path. A circuit 30 is a transistor that is turned on by the output signal of the circuit 28 and a running signal a, and a transistor 30 is connected between its collector and a power supply of 1 V. A second overload detection relay 31 is connected to the rated load detection relay 31.
Enables operation with live loads up to 0%. In addition,
When the traveling signal a and the traveling command signal are generated, '
11 level, and during other periods, the signal is ``L level.'' In the elevator control device configured in this way,
If the temperature in the machine room is normal (for example, 10°C to 40°C), the efficiency of the hoisting machine is good because the oil in the hoisting machine has a high coefficient of friction. Therefore, the capacity of the hoisting motor in this state allows the carrying load of the elevator to be considerably larger than the rated capacity. Therefore, the temperature of the machine room is detected by the machine room 1 degree detection I#20, and if the value of B is below a certain value (for example, 10 degrees Celsius), the resistor is set so that the output of the operational amplifier I1121 becomes "L" level. The reference @Vr is set by 22 to 24. Therefore, when the machine room temperature falls below 10°C, the knot gate and in this state the running signal a becomes 11 8 11
When this happens, the output signal of the Antogame 1 circuit 29 becomes 'H'.
Therefore, the transistor 30 is turned on and the second overload detection relay 31 is energized, thereby making it possible to operate with an I load up to 110% of the rated load. Next, when the machine room temperature exceeds 10°C, the operational amplifier 21
Since the output signal of is inverted to “■1” level,
Since the not gate level is reached and the I-transistor 30 is turned off, the second overload detection relay 31 is deenergized. Here, when the running signal α reaches the "I" level,
Since the output signal of the anti-game circuit 25 is inverted to "H" level, the transistor 26 is turned on,
The first overload detection relay 27 will be energized. When the first overload detection relay 27 is energized, the elevator can operate with a load up to 130% of the rated load. Therefore, in the circuit configured as described above, since the operable overload load is set according to the temperature of the machine room, the operating efficiency is increased in all traveling directions. In other words, it is configured to detect the machine room temperature, etc., and set the elevator overload limit value according to this detected value. This will allow the elevator to be operated with a load exceeding 100,000 yen, which will improve the operating efficiency of the elevator in all directions. FIG. 2 is a main circuit diagram showing another embodiment of the elevator control device according to the present invention, in which 32 is at the "H" level when a travel command is issued, and is at the "H" level during other periods. 33 is a clock signal generation circuit which generates a clock signal CK with a period T of one hour, for example. Reference numeral 34 denotes an ant game circuit which calculates the AND of the running command signal 32 and the clock signal CK output from the clock signal generation circuit 33. 35 is a counter that counts the number of runs per unit time (1 hour) set in the ``H'' period of the clock signal GK by counting the output No. 15 of the Antogame circuit 34; 1110 with count value as count value
When the clock signal CK exceeds the clock signal CK, the output signal This is a reset signal that is generated when the count value in each cycle does not reach the set value.In the circuit configured in this way, the travel command signal that is generated from the control system (not shown) is the clock signal generation port!
“H” JCl of clock signal OK output from @33
ffl! Only at Jl will it be supplied to the input C of the counter 34 via the antgame 1 circuit 34. The counter 34 sequentially counts the A: signals supplied to the input terminal C, and this count value indicates that the clock signal CK is "1".
If the set value has not been reached at the end of one cycle of inversion from 1" to "L++, a reset signal S is generated and a reset process is performed. Furthermore, when the count value exceeds the set value, the second overload detection relay 31 shown in FIG. 1 is energized by sending out the output signal , by allowing people to get into the car until the number of activations within a certain period of time exceeds a certain level, while suppressing the heat generation of the hoisting motor.
It becomes possible to increase the transportation efficiency of elevators. FIG. 3 is a schematic diagram showing still another embodiment of the present invention, in particular a case where load detection is performed by detecting power fluctuations in a speed control device that drives a hoisting N mower. . In the same figure, R, S, and T indicate each phase of a three-phase AC power supply, and 36 is a converter that converts the three-phase AC power supply into DC power by inputting it, and is composed of a diode bridge. . 37 is a smoothing capacitor that is connected between the output terminals of the converter 36 to smooth the converted DC output, and 38 is a three-phase AC power whose frequency corresponds to an external speed command. An inverter 39 is a hoisting motor driven by the three-phase AC power output from the inverter 38. Further, 40 and 41 are resistors connected in series between the power lines of the smoothed DC power source input to the inverter 38,
A divided voltage output is taken out between the connection point of the resistors 40 and 41. 42 to 44 are resistors that generate a reference voltage Vr by dividing a DC voltage of 10 V; 45 is a resistor 40;
This is an operational amplifier that compares the divided voltage signal of the DC power supply outputted from the connection point 41 with a reference value Vr. In the circuit configured in this manner, the three-phase AC current is configured by a diode bridge, and is converted to DC by the elevator 36. The DC converted by the converter 36 is smoothed by a smoothing capacitor 37 and converted into stable DC. Further, this direct current is converted into three-phase alternating current at a frequency corresponding to the speed command supplied from the outside in the inverter 38, and the hoisting power 1il.
By being supplied to the I machine 39, the elevator car is driven up and down at a specified speed. On the other hand, the DC voltage is taken out by being divided by the resistors 40 and 41, and this divided voltage value is applied to the rA calculation amplifier 4.
5 (Here, fluctuations in the DC power supply are detected by comparing with the reference signal Vr output from the reference value circuit constituted by the resistors 42 to 44. In other words,
If the voltage of the DC power supply is equal to or higher than the reference value Vr, the output signal of the operational amplifier 45 becomes "11 parepel", and by energizing the first overload detection relay 27 shown in FIG. It is controlled to allow load operation up to 130% of the voltage of the DC power supply.
If it has fallen below IIVr, the operational amplifier 45
Since the output signal of becomes "L" level, the first overload detection relay 27 is deenergized and the rated! Prevents operation with a load greater than A load. In addition, in the above explanation, we explained the case where the overload is set in two stages, but on the floor inside the elevator car,
Embedded with piezoelectric elements that generate voltage according to the load capacity,
If the output voltage of this piezoelectric element is configured to be limited according to the machine room temperature, it becomes possible to smoothly set the overload. [Effects of the Invention] As described above (According to the present invention, the temperature of the 81 machine room, etc. is detected, the overload # limit value of the elevator is set according to this detected value, and the elevator is effectively operated up to this overload. Because it is configured so that it can be used, it is possible to allow an appropriate number of elevators depending on the capacity of the hoisting motor, etc., and it is said that transportation efficiency can be improved in omnidirectional operation of elevators. effective.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an elevator control device according to the present invention, FIGS. 2 and 3 are schematic diagrams showing other embodiments of the elevator control device according to the present invention, and FIG. 4 is a conventional elevator control device. FIG. 5 is a circuit diagram showing the main parts of the device, and FIG. 5 is a circuit diagram showing peripheral circuits of the load detection circuit shown in FIG. 4. 20 Temperature detection device, 21 Operational amplifier, 22 to 24
Resistance, 25, 29 ・Antgame 1, circuit, 26.3
0-1-ransistor, 27 first overload detection relay,
28. Inverter circuit, 31.. Second overload detection relay 32.. Running command signal, 33. Clock signal generation circuit, 34.. Ant game 1. circuit, 35. Counter, 3.
6. Converter, 37 smoothing capacitor, 38. Inverter, 39. Hoisting motor, 40-44 Resistor, 45
・Operation amplifier. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] In an elevator control device that controls elevator operation, there is a means for detecting machine room temperature, number of starts, or variations in power supply voltage, etc., and an overload that exceeds the rated load weight is set according to the detected value from this detection means. What is claimed is: 1. A control device for an elevator, comprising: means for controlling the elevator; and a control means for effectively operating the elevator up to the set overload.