JPH047277A - Control device for hydraulic elevator - Google Patents

Abstract

PURPOSE:To have proper and stable speed control and avoid worsening of the riding comfort in an elevator cage by obtaining the mean as the actual speed of cage from sensing values for a certain period immediately before the speed sensing timing, comparing this mean value with the target speed, and thereupon performing speed control. CONSTITUTION:The oil amount supplied from an oil pressure pump 8 to a hydraulic jack 2 is controlled on the basis of the rate-of -flow control command for a valve 9 given by a speed control device 13, and the speed of a cage 1 is adjusted into a specified speed pattern. A speed pattern producing part receives signals from an oil temp. sensor 17 and an oil pressure sensor 16 and produces the corresponding speed pattern. A controlled object speed calculating part takes in the sensing speed of a speed sensor 18, and the mean of speed values over a certain period immediately before it is determined at each sensing timing, and the result is used as actual speed. The rate-of-flow control command is given to the valve 9 on the basis of the deviation of this actual speed from the specified speed pattern, and the cage is adjusted so that rise and fall is obtained according to the specified speed pattern, and thus stable speed control is achieved without frequent variations due to dispersion of the sensing values of oil temp. and oil pressure.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a control device for a hydraulic elevator.

(Prior Art) Hydraulic elevators generally employ a flow control method using valves. With this flow rate control method, when the elevator ascends, the hydraulic pump is rotated at a constant speed, and a fixed amount of oil is returned to the tank from this hydraulic pump.When a start command is issued, the amount of oil returned to the tank is adjusted using a valve. Control this speed by When the elevator descends, the speed of the car is controlled by controlling the flow rate of oil flowing back from the hydraulic cylinder to the tank depending on the weight of the car.

This control method originally requires circulating excess oil when ascending, and also causes a large energy loss as potential energy is consumed by the heat generated by the oil during descending.
The oil temperature rise is large.

To explain the operation of such a conventional hydraulic elevator control device, a valve for circulating pressure oil is closed when the car is stopped, and is opened in response to an operation command. The speed control device controls the amount of pressure oil discharged through this valve, and raises the car according to a predetermined speed pattern.

The speed characteristics at this time follow the speed pattern A shown by the solid line in FIG. 14 by the speed control device. That is, the car starts up in response to a start command, accelerates to the rated speed vO, then increases at the rated speed VO, and begins to decelerate when it reaches the deceleration switch position. Then, when it rises at a constant landing speed v1 and reaches the upper limit position, a stop switch is activated to stop the rise.

In addition, during descending operation, the descending speed of the car is adjusted by controlling the amount of oil discharged from the hydraulic jack due to the weight of the car using a valve.

(Problem to be Solved by the Invention) However, in such conventional hydraulic elevator control devices, when the load pressure or oil temperature of the hydraulic elevator changes, the viscosity of the oil changes and the volumetric efficiency of the hydraulic pump decreases. However, there was a problem in that the running pattern of the car deviated from a predetermined pattern. For example, when the car is raised, as shown in Fig. 15, a hydraulic pump generally decreases the amount of pressure oil discharged as the load pressure or oil temperature increases, and increases the amount of pressure oil discharged as the load pressure or oil temperature decreases, and accordingly, When the load pressure or oil temperature increases, the speed pattern of the car changes from the solid line running pattern A in Figure 14 to the dashed line running pattern B, and conversely, when the load pressure or oil temperature decreases, the running pattern C changes to the dashed line in the figure. becomes.

Furthermore, when descending, a phenomenon opposite to the above-described phenomenon occurs when ascending.

In the case of driving pattern B shown by the broken line, the driving time becomes longer, leading to a decrease in service, and in the case of driving pattern C shown by the dotted chain line, there is a problem that the riding comfort, especially when stopping, deteriorates. was.

Therefore, even when the load pressure or oil temperature fluctuates, measures are taken to reduce variations in the running pattern by outputting a control command value for a speed pattern that is close to the target speed pattern. . This method can be implemented by selecting parameters from a preset parameter table for speed pattern generation based on the input values of the oil temperature sensor and load pressure sensor for the current pressure oil.

By the way, when modeling the characteristics of a valve to be controlled, it is difficult to do so using a mathematical model that uses physical laws, and conventionally modeling has generally been done using statistical models. . For example, oil temperature and load pressure are registered as sensor input value data, and the speed level is set based on the magnitude of the data.Example tables are shown in FIGS. 5 and 6. In other words, the current oil temperature sensor and load pressure (hydraulic) sensor input values p, t
Based on this, address A is determined from the sensor input value table shown in FIG.
We seek.

However, even if you try to correct such a speed pattern, if you try to correct it to match the speed target value, the actual speed pattern will follow the target value with a delay due to the delayed response of the controlled system, resulting in divergence. There were some problems that could arise.

In addition, since the speed detection value at the time of speed detection is used as the actual value of the elevator speed,
When the load or oil temperature of the hydraulic elevator changes, the detected speed value also varies, and as a result, the target speed of the elevator cannot be stably followed, resulting in a problem that the elevator landing time varies.

The present invention has been made in view of these conventional problems, and provides a control device for a hydraulic elevator that can always obtain stable running characteristics by correcting the running characteristics of the hydraulic elevator using a control circuit with a simple configuration. The purpose is to provide

[Structure of the Invention] (Means for Solving the Problem) The control device for a hydraulic elevator according to the invention of claim 1 includes a hydraulic jack that raises and lowers an elevator car, and a hydraulic pump that supplies pressure oil to the hydraulic jack. an oil temperature sensor and an oil pressure sensor for pressure oil flowing through the hydraulic jack; a valve that controls the amount of oil supplied to the hydraulic jack by the hydraulic pump and the amount of oil discharged from the hydraulic jack; a speed detector that detects the speed of the car; a speed pattern generator that inputs the signal from the sensor and generates a predetermined travel speed pattern according to oil temperature and oil pressure; a speed control device that compares a predetermined speed pattern from the speed pattern generator with the actual speed detected by the speed detector and gives a flow control command to the valve based on the deviation so that the valve can move up and down; and a controlled object speed calculation unit that averages the speed detected by the speed detector over a predetermined period immediately before the speed detection point, and provides this average speed to the speed control device as an actual speed to be controlled. It is.

The control device for a hydraulic elevator according to the invention of claim 2 includes a hydraulic jack that raises and lowers an elevator car, a hydraulic pump that supplies pressure oil to the hydraulic jack, and an oil temperature sensor for the pressure oil flowing through the hydraulic jack. and a hydraulic sensor, a valve that controls the amount of oil supplied to the hydraulic jack by the hydraulic pump and the amount of oil discharged from the hydraulic jack, a speed detector that detects the speed of the car, and the sensor. a speed pattern generation unit that inputs a signal from the valve and generates a predetermined travel speed pattern according to oil temperature and oil pressure; and a speed pattern generation unit that inputs a signal from a speed control device that compares a predetermined speed pattern from the speed detector with the actual speed detected by the speed detector and gives a flow rate control command so as to approach the predetermined speed pattern in stages based on the deviation. It is.

Furthermore, the control device for a hydraulic elevator according to the invention of claim 3 comprises:
A hydraulic jack for raising and lowering an elevator car, a hydraulic pump for supplying pressure oil to the hydraulic jack, an oil temperature sensor and a hydraulic pressure sensor for the pressure oil flowing to the hydraulic jack, and the hydraulic pump for the hydraulic jack. a valve that controls the amount of oil supplied by the hydraulic jack and the amount of oil discharged from the hydraulic jack; a speed detector that detects the speed of the car; a speed pattern generation section that provides a predetermined traveling speed pattern; and a detection of the predetermined speed pattern from the speed pattern generation section and the speed detector for the valve so that the hydraulic jack can move up and down in the predetermined speed pattern. and a speed control device that compares the actual speed and, if the deviation exceeds a predetermined value, issues a flow rate control command to approach a predetermined speed pattern.

(Function) In the hydraulic elevator control device of the invention of claim 1, the hydraulic elevator and Adjust the speed of the car to a predetermined speed pattern.

Therefore, the speed pattern generation section receives the oil temperature and oil pressure detection signals from the oil temperature sensor and the oil pressure sensor, and generates and outputs a speed pattern corresponding to the oil temperature and oil pressure. Further, the controlled object speed calculating section takes in the detected speed from the speed detector, calculates the average speed over a certain period immediately before the detected time at each detection point, and outputs the average speed as the actual speed of the controlled object.

Then, the speed control device compares the predetermined speed pattern from the speed pattern generation section and the actual speed from the controlled object speed calculation section, and gives a flow control command to the valve based on the deviation. By controlling the flow rate based on commands, the hydraulic jack and car are adjusted to move up and down in a predetermined speed pattern, and stable speed control is achieved without frequent fluctuations due to variations in oil temperature or oil pressure detection values. conduct.

In the hydraulic elevator control device of the invention of claim 2, the speeds of the hydraulic jack and car are controlled to a predetermined speed by controlling the amount of oil supplied from the hydraulic pump to the hydraulic jack based on the valve flow rate control command from the speed control device. Adjust to speed pattern.

Therefore, the speed pattern generation section receives the oil temperature and oil pressure detection signals from the oil temperature sensor and the oil pressure sensor, and generates and outputs a speed pattern corresponding to the oil temperature and oil pressure.

The speed control device then compares the predetermined speed pattern from the speed pattern generator with the actual speed from the speed detector,
If there is a deviation, it is recommended to give the flow control command to the valve in several stages so that it approaches the specified speed little by little, and to reduce the divergence that tends to occur when controlling the flow rate to cover a large deviation at once. prevention and accurate speed control.

In the hydraulic elevator control device of the invention of claim 3, the speed of the hydraulic jack and the car is controlled to a predetermined speed by controlling the amount of oil supplied from the hydraulic pump to the hydraulic jack based on the valve flow rate control command from the speed control device. Adjust to speed pattern.

Therefore, the speed pattern generation section receives the oil temperature and oil pressure detection signals from the oil temperature sensor and the oil pressure sensor, and generates and outputs a speed pattern corresponding to the oil temperature and oil pressure.

The speed control device then compares the predetermined speed pattern from the speed pattern generator with the actual speed from the speed detector,
If the deviation is larger than a predetermined value, control the valve's flow rate so that it approaches the predetermined speed pattern, and if the deviation is not that large, do not control the flow rate to cover the large deviation at once. This prevents the divergence that tends to occur when driving the vehicle, and also prevents the deterioration of ride comfort caused by frequent speed control.

(Embodiments) Hereinafter, embodiments of the invention according to claims 1 to 3 will be described in detail based on the drawings.

FIG. 1 is a block diagram of an embodiment of the invention, in which a car 1 is suspended from a lobe 5 wrapped around a pulley 4 that is moved up and down by a plunger 3 of a hydraulic jack 2.

Reference numeral 6 denotes a hydraulic pipe, in which oil from a hydraulic pump 8 rotatably driven by an electric motor 7 is supplied to a hydraulic jack 2 via a valve 9.
It is provided between the hydraulic pump 8 and the hydraulic jack 2 in order to supply oil from the hydraulic jack 2 to the tank 0 via a valve 9.

11 is a power source for the electric motor 7.

Reference numeral 12 is an elevator control device that controls all operations of this hydraulic elevator, and reference numeral 13 is a speed control device that controls the traveling speed of the car 1.

In order to give necessary signals to the speed control device] 3, a deceleration switch 14 and a stop switch 15 are provided near each floor of the hoistway, and a hydraulic pressure sensor 16 is further provided in the hydraulic piping 6. , oil temperature sensor 1 is installed in tank 10.
7 is provided, and the car 1 is further provided with a speed detector 18.

The detailed configuration of the speed control device 13 is shown in FIG. 2, which includes a deceleration switch 14, a stop switch 15, and a speed detector 1
External signal input circuit 13 for inputting digital signals from 8
1, and a valve control controller 13 that generates a speed pattern based on an operation command from the elevator control device 12.
2, a valve control unit 133 that outputs a valve control signal to the valve 9 based on the speed pattern, and an electric motor 7.
and a pump control unit 134 that drives the pump.

As shown in FIG. 3, the valve control controller 132 includes a signal input/output control section 1321 and a storage section in which data fetched from the signal input/output control section 1321 and programs for control calculations are stored. 1322
, an average speed calculation section 1323 that calculates a speed average value based on the speed detection values stored in the storage section 1322, and a speed pattern generation section that outputs a predetermined speed pattern based on oil temperature data and oil pressure data. 1324, and a valve control calculating section 1325 that calculates the amount of oil supplied to the hydraulic jack 2.

Note that the location where the oil temperature sensor 17 is provided is not particularly limited to inside the tank 10, and may be provided on the hydraulic jack 2 or in the middle of the piping between the hydraulic jack 2 and the hydraulic pump 8. Furthermore, although oil temperature and load pressure were used as control factors in the above embodiments, the control factors are not limited to these factors, and for example, valve temperature, tank temperature, oil flow rate, etc. may also be used.

Next, the operation of the hydraulic elevator control device having the above configuration will be explained.

When the car 1 is stopped, the electromagnetic switching valve of the valve 9 is closed. Then, when a driving command is given from the elevator control device 12, the electric motor 7 starts rotating. Therefore, based on the speed pattern generated by the speed control device 13, the opening and closing of the valve 9 is controlled, thereby controlling the discharge amount of the hydraulic pump 8, and the lifting speed of the plunger 3 of the hydraulic jack 2 and the car 1. or controlled.

As mentioned above, if you try to control the speed according to the same speed pattern shown in Figure 14 regardless of oil pressure and oil temperature, the actual running waveform will change significantly due to changes in oil pressure and oil temperature. It turns out. Therefore, in order to obtain a predetermined speed pattern even when the oil pressure and oil temperature change, it is necessary to generate a speed pattern as shown in FIG. 4. In other words, if the normal oil pressure and oil temperature pattern is AO, when the oil pressure and oil temperature are high, the hydraulic pump discharge amount is small, so the pattern A1 is generated.

For this reason, the storage unit 1322 of the valve control controller 131 in the speed control device 13 includes a first table for selecting a speed pattern based on a combination of oil pressure and oil temperature as shown in FIG. 5, and a first table as shown in FIG. Acceleration α, deceleration β, and top pattern S1 for each speed pattern as shown
, a second table defining the creep pattern S2 is stored. Therefore, based on the oil temperature signal and oil pressure signal input, the speed pattern generation section 1324 refers to these first and second tables to find a corresponding speed pattern and outputs it to the valve control calculation section 1325.

In addition, the average speed calculation unit 1323 stores the speed detection signal from the speed detector 18 in the storage unit 1322, and at the same time, each time each speed signal is input, the average speed calculation unit 1323 calculates the average speed for a predetermined period immediately before the speed detection time. is calculated from the data stored in the storage section 1322 and output to the valve control calculation section 1325.

The valve control calculation unit 1325 includes the average speed calculation unit 1
A speed deviation is obtained by comparing the average speed from 323 with the speed pattern from the speed pattern generation section 1324, and the corresponding flow rate control amount is calculated and used as a flow rate control command signal to control the valve via the input/output control section 1321. unit 1
Output to 33.

The valve control unit 133 determines the necessary valve control amount based on the flow control command from the valve controller 132, adjusts the valve opening of the valve 9 to control the amount of circulating oil, and controls the hydraulic jack 2. The vertical speed of the plunger 3 is controlled to be a predetermined speed pattern AO.

Next, a series of detailed operations of these speed control devices 13 will be explained based on the flowcharts of FIGS. 7 and 8.

First, an operation command is input from the elevator control device 12,
The startup routine is entered only when predetermined startup conditions are met (step 5101). When started,
First, oil temperature and oil pressure detection signals are input from each sensor 16, 17 (step 5102).

Next, from the first table of FIG. 5 stored in advance, the address Aij corresponding to the oil temperature and oil pressure at that time is determined.
(Step 8103).

Next, similarly, the second part of Fig. 6, which is stored in advance,
From the table, extract a plurality of data stored in the extracted address Atj, that is, acceleration α, deceleration β, top pattern S1, and creep pattern S2 (
Step S104).

Then, based on the velocity pattern thus extracted, an acceleration pattern based on the acceleration α is output in accordance with a calculation formula stored in advance (step 5105).

Next, when the acceleration pattern becomes equal to the top pattern S1, the top pattern S1 as a constant speed pattern is output, and speed control is performed to maintain this as the target speed (steps 5106 and 5107).
.

Next, pattern correction processing begins (step 5108).
.

In the pattern correction process, as shown in FIG. 8, the current running speed of the elevator is detected (step 5201) and compared with the target speed S1 (step 5202).

Here, the running speed of the elevator is determined by the speed detector 18.
The detected speed is not directly used, but the average speed calculated by the average speed calculating section 1323 is used. That is, as shown in FIG. 9, the speed data Vl, V2 .・
..., the average value Vx of Vn is determined as follows, and this is used as the actual speed to be actually controlled.

Vx −Σ Vi Therefore, the actual speed of the elevator Vx is higher than the target speed S1.
If is larger, the speed pattern value ■ is decreased by a predetermined amount δ (step 8203).

On the other hand, if the actual speed VX of the elevator is smaller than the target speed S1, the speed pattern value V is increased by a predetermined amount δ (step 5204).

The speed pattern value V corrected in this way is output as a target speed, and speed control is performed to match this speed (step 205).

Next, when traveling at the rated speed, the external signal input circuit 13
When the signal from the deceleration switch 14 of the destination floor is input from 1 to 1, a deceleration pattern is output based on the deceleration β (steps 5109 and 5IIO).

Next, when the deceleration pattern becomes equal to the creep pattern S2, the creep pattern S2 is maintained and output (step 5ill, 5112). Then, the same pattern correction process as in step 8108 described above is performed here as well (step 311B).

Next, when a signal from the destination floor stop switch 15 is input from the external signal input circuit 131, pattern output is stopped (steps 8114 and 5115).

Since the speed pattern is corrected in this way, the actual running speed of car 1 can be maintained at the same speed as normal (pattern A shown in FIG. 14). become.

Next, the invention of claim 2 will be explained in detail. The embodiment of the invention of claim 2 has the same circuit configuration as the embodiment of the invention of claim 1, and FIGS. 1 and 2 can be used in common. The valve controller 132 of the speed control device 13 has a configuration as shown in FIG.

In other words, the speed control device 13 includes a signal input/output control section 1321 that controls input of each signal and output of calculation results, and a signal input/output control section 1321 shown in FIG. 5 for determining a speed pattern corresponding to oil temperature and oil pressure. A storage unit 1322 that stores the table, a second table shown in FIG. 6, other necessary parameters, calculation programs, etc., and a speed pattern generation unit 1324 that generates a speed pattern in response to input oil temperature and hydraulic pressure data. and a valve control calculation unit 1325 that calculates a valve control amount from the deviation between the speed pattern generated by the speed pattern generation unit 1324 and the actual traveling speed.

Next, the operation of this embodiment of the invention according to claim 2 will be explained. This embodiment also operates based on FIGS. 1 and 2 in substantially the same way as the embodiment of the invention claimed in claim 1.

Also, does the speed control device 13 control the traveling speed so that it always matches a constant target speed based on the flowchart of FIG. 7, as in the embodiment of the invention of claim 1?
The pattern correction processing in steps 5108 and 5113 is different from the embodiment of claim 1, and operates as shown in the flowchart of FIG.

That is, the current elevator running speed is input and compared with the target speed S1 or S2 (step 5301). If the actual car speed of the elevator is greater than the target speed, the speed pattern value V is decreased by a predetermined amount δ2 (step 5302). However, if the car speed is lower than the target speed, the speed pattern value V is increased by a predetermined amount δ2 (step 3303).

In this way, in the -th correction process, the correction is performed by 62 minutes, and the corrected speed pattern value ■ is output as the target speed (step 5304).

If the speed pattern of the target value is not reached even after this - degree correction, the above-mentioned 62-minute correction is repeated (step 5305).

In other words, as shown in FIG. 12, the target speed S1 or S
2, the control command speed ■ is controlled to approach the current elevator speed V step by step by 62 minutes at a time, and -
This prevents the divergence that tends to occur when correcting the separation Δ at the same time, and enables accurate speed control.

Furthermore, in the invention of claim 2 as well, instead of using the detection value of the speed detector 18 as it is as the actual speed of the car, the value at each detection time is used as in the embodiment of claim 1 shown in FIG. Take the average speed in the previous predetermined period,
This average speed may be used as the actual speed and compared with the target speed, and by doing so, more stable speed control is possible.

Next, an embodiment of the invention according to claim 3 will be described.

The embodiment of the invention of claim 3 has the same circuit configuration as the embodiments of the invention of claims 1 and 2, and FIGS. 1 and 2 can be used in common. The valve control controller 132 of the speed control device 13 has a configuration similar to that shown in FIG. 10 as an embodiment of the invention of claim 2.

In other words, the speed control device 13 includes a signal input/output control section 1321 that controls input of each signal and output of calculation results, and a signal input/output control section 1321 shown in FIG. 5 for determining a speed pattern corresponding to oil temperature and oil pressure. A storage unit 1322 that stores the table, a second table shown in FIG. 6, other necessary parameters, calculation programs, etc., and a speed pattern generation unit 1324 that generates a speed pattern in response to input oil temperature and hydraulic pressure data. and a valve control calculation unit 1325 that calculates a valve control amount from the deviation between the speed pattern generated by the speed pattern generation unit 1324 and the actual traveling speed.

Next, the operation of this embodiment of the invention according to claim 3 will be explained. This embodiment also operates based on FIGS. 1 and 2 in substantially the same way as the embodiments of the invention according to claims 1 and 2.

Then, the speed control device 13 controls the traveling speed so as to always match a constant target speed based on the flowchart of FIG. 7, as in the embodiments of the invention of claims 1 and 2. and step 811
The pattern correction processing of No. 3 is different from the embodiments of either claim 1 or claim 2, and operates as shown in the flowchart of FIG.

That is, first, the current running speed of the elevator car is input, and it is determined whether this is located within a certain range centered on the target speed S1 or S2. If the actual speed is within a certain range including the target speed, no correction is required and the process returns. However, if it is not included in that area, correction will be performed (step 5401).

First, if the car speed is greater than the upper limit of the allowable range for the target speed, the target speed is set to a speed pattern value V by δ3 (steps 5402 and 8403).

Conversely, if the car speed is smaller than the lower limit of the allowable range for the target speed, the speed pattern value V is set as the target speed increased by δ3 (step 54025404).

Then, the speed pattern value V thus obtained is returned to the main routine as a correction output, and a valve control command is issued to match this speed pattern to adjust the car speed.

By performing speed control in this way, it is no longer necessary to frequently change the speed pattern to be followed when the actual speed does not fluctuate much, and this prevents deterioration of ride comfort due to changes in speed pattern. be able to.

In this embodiment as well, the configuration of the valve controller 132 of the speed control device 13 may be as shown in FIG. 3, and the average value for a predetermined period immediately before the speed detection time may be used as the actual speed of the car. In this case, there is no need to respond too sensitively to temporary changes in oil temperature or oil pressure, and more stable speed control can be achieved.

[Effect of the Invention] As described above, according to the invention of claim 1, when controlling the speed, the average of the detected values for a certain period immediately before the speed detection time is determined as the actual speed of the car, and this average speed is set as the target speed. Since the speed is controlled by comparison, it is possible to avoid speed control that is too sensitive to temporary fluctuations in oil temperature or oil pressure, and it is possible to perform accurate and stable speed control. It is also possible to avoid deterioration in ride comfort caused by the change.

In addition, in the invention of claim 2, when controlling the speed, a speed pattern is generated that brings the actual speed closer to the target speed in stages. Divergence that tends to occur when changing speed patterns frequently can be prevented, and stable speed control can be achieved.

Furthermore, in the invention of claim 3, when the actual speed deviates from the target speed by a large amount beyond a predetermined range, the speed control is performed by changing the speed pattern, or the speed is controlled by changing the speed pattern. If the separation does not exceed a predetermined range, a constant speed pattern is maintained, so the oil temperature,
It is possible to realize the running of the elevator car in a speed pattern in a speed range that always has an appropriate constant range without being affected by fluctuations in oil pressure.

[Brief explanation of drawings]

Fig. 1 is a system diagram of an embodiment of the invention of claim 1, Fig. 2 is a circuit block diagram of the speed control device of the above embodiment, and Fig. 3 is a circuit block diagram of the valve control controller in the speed control device of the above embodiment. 4 is a timing chart for explaining the control operation of the above embodiment, FIG. 5 is an explanatory diagram of the first table stored in the storage section of the above embodiment, and FIG. 6 is a timing chart for explaining the control operation of the above embodiment. FIG. 7 is a flowchart explaining the operation of the speed control device of the above embodiment, and FIG. 8 is a flowchart showing the speed pattern correction processing routine of the speed control device of the above embodiment. , FIG. 9 is an explanatory diagram of the speed control operation of the above embodiment, the first
0 is a block diagram showing the configuration of a valve control controller in a speed control device according to an embodiment of the invention according to claim 2, FIG. 11 is a flowchart showing a speed pattern correction processing routine of the speed control device according to the above embodiment, and FIG. The figure is an explanatory diagram of the operation of the speed control device of the above embodiment, and FIG.
14 is a timing chart showing the operating characteristics of a general hydraulic elevator, and FIG. 15 is an explanation showing the characteristics of a general hydraulic pump. It is a diagram. 1... Car 2... Hydraulic jack 8
...Hydraulic pump 9...Valve 10...Tank 12...Elevator control device 13...Speed control device 14...Deceleration switch 1
5... Stop switch 16... Oil pressure sensor 17.
...Oil temperature sensor 18...Speed detector 131...
- External signal input circuit 132... Valve control controller 133... Valve control unit 134... Pump control unit 1321... Input/output control section 1322... Storage section 1323... Average speed calculation section 1324...・Speed pattern generation unit 1325...Valve control calculation unit

Claims (3)

[Claims] (1) A hydraulic jack for raising and lowering an elevator car; a hydraulic pump for supplying pressure oil to the hydraulic jack; an oil temperature sensor and a hydraulic pressure sensor for the pressure oil flowing to the hydraulic jack; and for the hydraulic jack. A valve that controls the amount of oil supplied by the hydraulic pump and the amount of oil discharged from the hydraulic jack; A speed detector that detects the speed of the car; A signal from the sensor is input, and the oil temperature and oil pressure are determined. a speed pattern generating section that generates a predetermined running speed pattern according to the speed pattern; a speed control device that compares the actual speed detected by the speed detector and gives a flow control command based on the deviation; and averages the speed detected by the speed detector over a predetermined period immediately before the speed detection point,
A control device for a hydraulic elevator, comprising: a controlled object speed calculation unit which provides the average speed to the speed control device as an actual speed to be controlled. (2) A hydraulic jack for raising and lowering an elevator car, a hydraulic pump for supplying pressure oil to the hydraulic jack, an oil temperature sensor and a hydraulic pressure sensor for the pressure oil flowing to the hydraulic jack, and for the hydraulic jack. A valve that controls the amount of oil supplied by the hydraulic pump and the amount of oil discharged from the hydraulic jack; A speed detector that detects the speed of the car; A signal from the sensor is input, and the oil temperature and oil pressure are determined. a speed pattern generating section that generates a predetermined running speed pattern according to the speed pattern; A control device for a hydraulic elevator, comprising: a speed control device that compares the actual speed detected by the elevator with the actual speed detected by the elevator, and gives a valve control command so that the actual speed approaches the speed pattern stepwise based on the deviation. (3) A hydraulic jack for raising and lowering an elevator car, a hydraulic pump for supplying pressure oil to the hydraulic jack, an oil temperature sensor and a hydraulic pressure sensor for the pressure oil flowing to the hydraulic jack, and for the hydraulic jack. A valve that controls the amount of oil supplied by the hydraulic pump and the amount of oil discharged from the hydraulic jack; A speed detector that detects the speed of the car; A signal from the sensor is input, and the oil temperature and oil pressure are determined. a speed pattern generating section that generates a predetermined running speed pattern according to the speed pattern; A control device for a hydraulic elevator, comprising: a speed control device that compares the actual speed detected by the elevator and, if the deviation is larger than a predetermined value, issues a flow control command to approach a predetermined speed pattern.