JPH0342476A - Control device for hydraulic elevator - Google Patents

Abstract

PURPOSE:To prevent a cage from being stopped past a door zone by nullifying deceleration start point control, and immediately outputting a deceleration command when an abnormality detecting circuit or a landing state detecting means detects an abnormality. CONSTITUTION:A deceleration delay time calculating circuit 23 calculates the delay time based on the data such as the cage speed, load and oil temperature. When an abnormality detecting circuit 22 or a landing state detecting means 30 detects an abnormality, an operation control circuit 24 nullifies the deceleration start point control based on the signal of the deceleration delay time calculating circuit 23 and immediately outputs a deceleration command. When the deceleration command is sent from the operation control circuit 24, a cutoff command is sent to a lifting high-speed solenoid valve control circuit 25, the feed quantity of oil to a cylinder is decreased, and a cage is decelerated. When the cage reaches a stop position point, a lifting low-speed solenoid valve control circuit 26 is cut off, and the cage is stopped. The cage is prevented from being stopped past a door zone.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for a hydraulic elevator.

[Prior Art] Generally, in a hydraulic elevator, when the temperature of oil changes, the viscosity of the oil changes, and when the oil temperature decreases, the viscosity of the oil increases. This affects the performance of the flow control valve, and even if an operation command is given to the flow control valve, the time required for flow control becomes longer.

As a result, the deceleration becomes smaller and the distance required for deceleration becomes longer. On the other hand, as the oil temperature increases, the viscosity of the oil decreases,
The time required for flow rate control becomes shorter, the deceleration becomes greater, and the deceleration distance becomes shorter.

The load pressure of the car also affects the performance of the flow control valve; for example, when the car is rising, the greater the load, the greater the differential pressure between the input and output of the flow control valve, and the shorter the deceleration distance.

Therefore, if the position of the deceleration cam that gives the deceleration command is set at the shortest deceleration distance, there is a risk of stopping beyond the normal landing point when the oil temperature drops. Fixedly set assuming the average value of Therefore, when the oil temperature is high and the deceleration is large, the time required for the car to travel at low speed from the operating position of the *ffi control valve to the stop position becomes longer, reducing the operating efficiency of the hydraulic elevator. Energy loss increases and becomes uneconomical. Also, if the oil temperature is low and the deceleration is small, the deceleration distance will be long, causing the engine to overshoot and stop, necessitating re-alignment each time.

Therefore, as shown in JP-A-57-199770, for example, the start of deceleration is controlled according to the oil temperature and the car load (hereinafter referred to as deceleration start point control) to obtain appropriate deceleration characteristics. What is proposed is that it can be obtained.

[Problems to be Solved by the Invention] However, in a device that performs deceleration start point control according to oil temperature and car load, if an excessive deceleration delay time is output due to an abnormality etc., deceleration cannot be started. The system was delayed, and the stop command was issued before the deceleration was completed, resulting in the stopping distance being extended, resulting in the train stopping inadvertently, or in the worst case scenario, passing through the door zone and stopping, trapping passengers inside the car.

In this way, excessive deceleration delay time is output when, for example, the detected load pressure is lower than the actual load pressure due to a disconnection or half-break in the pressure sensor, or when the detected value is lower than the actual load pressure due to slippage of the car speed detection device, etc. This occurs when the value is lower than the speed, when there is a failure in an electric circuit such as an arithmetic circuit, or when there is a single malfunction such as noise, but it is a problem that it immediately becomes impossible to operate due to this.

In view of the above points, the present invention prevents the car from passing through the door zone and stopping during deceleration start point control even if an excessive deceleration delay time is output due to an abnormality etc., and prevents the car from accidentally leaving the door zone. To provide a control device for a hydraulic elevator that can prevent passengers from being trapped in a car by making it possible to re-align the floors up to a predetermined number of times even if the elevator stops due to a car.

[Means for Solving the Problems] A control device for a hydraulic elevator according to the present invention has the following features:
An abnormality detection circuit detects the presence or absence of an abnormality based on detection signals from multiple detectors that detect load pressure, oil temperature, etc., and a deceleration preparation command is input based on the detection signals from the multiple detectors. After that, there is a deceleration delay time calculation circuit that calculates the delay time until the start of deceleration, a landing state detection means that detects the landing state of the car and detects whether there is an abnormality in the control, and a deceleration delay time calculation circuit that calculates the delay time until the start of deceleration. deceleration command means for outputting a deceleration command after a deceleration delay time calculated by the time calculation circuit, and immediately outputting a deceleration command when an abnormality detection signal from the abnormality detection circuit or landing state detection means is input. It is something.

[Function] In the present invention, when the abnormality detection circuit or the landing state detection means detects an abnormality, the deceleration command means invalidates the deceleration start point control based on the signal of the deceleration delay time calculation circuit and immediately outputs the deceleration command. This prevents the car from passing through the door zone and stopping. As a result, even if the deceleration delay time is excessively output due to an abnormality or the like, it is possible to prevent the hydraulic elevator from being stopped.

[Examples] The present invention will be explained below with reference to illustrated examples. FIG. 1 is a system configuration diagram of a hydraulic elevator according to an embodiment of the present invention. In the figure, (1) is a hoistway, (2> is a hoistway (1)
) is a cylinder filled with oil (3), which is installed at the bottom of (
4> is the plunger inserted into the cylinder (2), (5)
is a cage connected to the head of the plunger (4), (5a)
Car floor, (6) is a deceleration position detection switch provided on the car (5> side), and (7) is a cam that is provided on the hoistway (1) side and engages with the operating lever of the deceleration position detection switch (6). ,
(8) A basket speed detection device, which includes a pulley, rope,
and a pulse generator.

Therefore, (9) is a pipe connected to cylinder (2),
(lO> is connected to pipe (9>) and when operated, pipe (9)
The rising solenoid valve that sends pressure oil to the pipe (9) (engineering 1)
(12) is a hydraulic pump connected to the ascending solenoid valve (10); (13) is a hydraulic pump electric motor that drives the hydraulic pump (12);
4) is the lowering solenoid valve (11) and hydraulic pump (12)
The oil tank (15) connected to the cylinder (2) is a pressure sensor that detects the load pressure inside the cylinder (2), which changes depending on the load inside the car. In addition, (L6> is the oil tank (14)
This is an oil temperature sensor installed inside the engine to detect the temperature of the oil (3).

FIG. 2 is a block configuration diagram of the control circuit in this embodiment, in which (8a) is a pulse signal from the car speed detection device (8), (15a) is a pressure signal from the pressure sensor (15), (18a) is the oil temperature signal from the oil temperature sensor (1B), (18) is a travel distance calculation circuit that calculates the travel distance and remaining distance to the stop floor, etc. based on the pulse signal (8a), and (19) is A car speed detector that converts a pulse signal (8a) into a car speed, (20) a load detector that converts a pressure signal (15a) into a predetermined value, and (21) an oil temperature signal (18).
(22) is an abnormality detection circuit that detects abnormalities in each detector and circuit; (23) is a car speed;
This is a deceleration delay time calculation circuit that calculates delay time based on data such as load and oil temperature, and is composed of, for example, a microcomputer.

Further, 24) is a known operation control circuit that controls the operation of the car (5) in response to a normal call, and is composed of, for example, a microcomputer. (25) is a high-speed ascending solenoid valve control circuit that gives a command to the ascending solenoid valve (10) to operate at high speed, and (26) is also the ascending solenoid valve (10).
(27) is a low speed solenoid valve control circuit for lowering which gives a command to the lowering solenoid valve (11) to operate at a low speed; (27) is a high speed solenoid valve control circuit for lowering which gives a command to the lowering solenoid valve (11) to operate at high speed;
Similarly, the lowering solenoid valve control circuit gives a command to the lowering solenoid valve (11) to operate at low speed, (29) is the motor control circuit that controls the rotation of the electric motor (13), and (30) is the car (5). ) is a landing state detection means that detects the landing state of the vehicle and detects whether or not there is an abnormality in its control.

FIG. 3 is a processing flowchart of the main routine showing the operation of the control circuit in this embodiment, in which processing A calculates the deceleration delay time, processing B performs deceleration start point control,
In process C, an abnormality is detected.

Next, the operation of the apparatus of this embodiment will be explained based on the processing flowcharts of FIGS. 4 to 6 showing subroutines of each processing unit in FIGS. 1, 2, and 3. When a call for an upper floor is registered in a call registration circuit (not shown), the electric motor control circuit (29) operates to rotate the electric motor (t8) and drive the hydraulic pump (12). Further, the high-speed ascending solenoid valve control circuit (25) and the low-speed ascending solenoid valve control circuit (2B) operate to control the ascending solenoid valve (10). As a result, the oil in the oil tank (14) is transferred from the ascending solenoid valve (10) to the cylinder (2) through the pipe (9).
) and the car (5) rises. Needless to say, at this time, the safety of the running of the car (5>) is confirmed by the abnormality detection circuit (22).

When the car (5) approaches the floor where it should stop, the operating lever of the deceleration position detection switch (8) engages the cam (7), the deceleration position detection switch (6) operates, and the deceleration preparation command (6) is activated.
a) is emitted.

At this time, the deceleration delay time calculation circuit (23) reads the driving direction, high speed driving, low speed driving, etc. as shown in FIG. 4 (Step 31), and reads the pulse signal from the speed detecting device (8), Detect the speed from the speed signal (8a) from the car speed detector (19) (step 32), detect the pressure from the pressure signal (15a) from the load detector (20) (step 83), oil temperature detector (21) Detect the oil temperature from the oil temperature signal (-16a) from 5tep34)
If the abnormality detection circuit (22) confirms that there is no abnormality in speed, pressure, and oil temperature (Step 35), and further confirms that the flag < I J YO) is "0" (Step 3B) , detected car speed, load pressure,
Calculate deceleration delay time based on oil temperature (Si20) 3
7) o However, if it is determined that there is an abnormality in 5step 35, set the flag (IJYO) to "1" and 5step 3B),
Furthermore, after confirming that the flag (IJYO) is not "0" at step 36, the delay time is set to zero (Step 36).
p39), disables deceleration start point control.

The deceleration start point control is performed by the operation control circuit (24) as shown in FIG. First, deceleration position detection switch (8)
(Step 41) and issues a deceleration preparation command (Step 41).
Determine whether or not a> has appeared (Step 42); if not, clear the flag (FLAG) to zero (Step 43)
. If it is output, check whether the flag (FLAG) is set to "1" or not (5step 44), "1"
If it is not set to , that is, when the signal of the deceleration position detection switch (6) is detected for the first time, the flag (FLAG) was cleared to zero in the previous cycle, so the counter (TIME) is set to the value calculated in step 37 above. At the same time, the flag (FLAG) is set to "1" (Step 45). Here the flag (
After setting FLAG) to "1", even if the signal from the deceleration position detection switch (6) is detected, the counter (T
The value of IME) does not change.

Next, it is determined whether the flag (IJYO) is set to "1", that is, whether an abnormality is detected at step 3Ei described above (5step 4B), and if an abnormality is detected, a deceleration command is immediately issued. Output 5tep4
7), decelerate the car (5). If there is no abnormality, check the value of the counter (TIME) (5 steps 48), and if it is not zero, subtract the value of the counter (TIME) (5 steps)
49), when it becomes zero in the subsequent cycle, 5tep4
The process proceeds from step 8 to step 47, and a deceleration command is output.

After the delay time, when a deceleration command is issued by the operation control circuit (24), a cutoff command is sent to the high-speed ascending solenoid valve control circuit (25), and the cylinder (2) is activated by the operation of the ascending solenoid valve (10). The amount of oil (3) sent to the car (5) decreases and the car (5) decelerates. When the car reaches the stop position, the lift low-speed solenoid valve control circuit (26) is also shut off, and the car (5) stops.

For descending operation, use the descending solenoid valve (11) in the same way as for ascending.
) is controlled, and the oil (3) in the cylinder (2) is connected to the pipe (9).
) and the oil tank (14) through the lowering solenoid valve (11).
is discharged to. As a result, the car (5) decelerates and stops.

Next, a case where an excessive deceleration delay time is output due to some abnormality will be explained based on FIG. 6.

First, it is determined whether a deceleration command is output at step 47 of deceleration start point control (Fig. 5) (step 50),
If it is output, it is determined whether the car (5) has stopped or not (step 51), and if it has stopped, the landing state detection means (step 51) is output.
) to determine whether the stop position is within the door zone (St
ep52). If it is within the door zone, it is determined whether it is at the normal stop position (Step 53), if it is not at the normal stop position, a well-known re-floor alignment command is issued (Step 54), and if it is not within the door zone, the value of eont is advanced (Step 53).
55).

Next, it is determined whether the value of cont is within a predetermined value (5step 5B), and if it is within the predetermined value, the process proceeds to 5step 54, a re-floor alignment command is generated to enable floor re-alignment, and if it is greater than the predetermined value, deceleration is performed. It is determined that there is an abnormality in the start point control, and the flag IJYO is set to "1" (Step 57). From then on, the deceleration start point control is disabled, and when the deceleration preparation command (6a) is issued, step 544-45- in FIG. 48-4
Process in the order of 7 and immediately decelerate.

After that, if the vehicle exits the door zone, it is determined that the abnormality is other than deceleration start point control, and restarting is disabled. Further, if the car speed when entering the door zone is so high that it is obvious that the car will pass through the door zone, the door may not be opened.

As described above, in this embodiment, when the abnormality detection circuit (22) or the landing state detection means (30) detects an abnormality, the operation control circuit (24) performs deceleration based on the signal from the deceleration delay time calculation circuit (23). Start point control is disabled and a deceleration command is immediately output to prevent the car (5) from passing through the door zone and stopping.This allows the hydraulic elevator to continue operating even if an excessive deceleration delay time is output due to an abnormality. It is possible to prevent the car from being left in a stopped state, and it is possible to detect the problem multiple times in response to reoccurring failures, and it is possible to prevent passengers from becoming immediately trapped in the car. can.

[Effects of the Invention] As described above, according to the present invention, when the abnormality detection circuit or landing state detection means detects an abnormality, the deceleration command means performs deceleration start point control based on the signal of the deceleration delay time calculation circuit. Since the configuration is configured to output the deceleration command immediately after disabling it, even if an excessive deceleration delay time is output due to some abnormality,
It is possible to prevent the car from passing through the door zone and stopping, and it is possible to prevent the hydraulic elevator from being stopped, which prevents the operation of the hydraulic elevator from being disrupted and allows passengers to This has the effect of not causing any mistrust.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram showing one embodiment of a hydraulic elevator control device according to the present invention, FIG. 2 is a block configuration diagram of its control circuit, FIG. 3 is a processing flowchart of a main routine showing its operation, and FIG. 4 to 6 respectively show the subroutines of each processing section in FIG. 3. FIG. 4 is a processing flowchart for deceleration delay time calculation, FIG. 5 is a processing flowchart for deceleration start point control, and FIG. The figure is a processing flowchart of abnormality detection. In the figure, (5) is the car, (6a) is the deceleration preparation command,
(19) is the car speed detector, (20) is the load detector, (
21) is the oil temperature detector, (22) is the abnormality detection circuit, (23)
) is the deceleration delay time calculation circuit, (24) is the operation control circuit (
Deceleration command means) and (30) are landing state detection means. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] An abnormality detection circuit that detects the presence or absence of an abnormality based on detection signals from multiple detectors that detect car speed, load pressure, oil temperature, etc.;
a deceleration delay time calculation circuit that calculates the delay time until the start of deceleration after a deceleration preparation command is input; a landing state detection means that detects the landing state of the car and detects whether there is an abnormality in the control; Specifically, a deceleration command is output after the deceleration delay time calculated by the deceleration delay time calculation circuit, and the deceleration command is immediately output when an abnormality detection signal from the abnormality detection circuit or landing state detection means is input. A control device for a hydraulic elevator, comprising a command means.