JPH0768015B2 - Hydraulic elevator controller - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a device for controlling a hydraulic elevator, particularly for controlling deceleration.

[Conventional technology]

FIG. 7 is a block diagram showing a hydraulic elevator disclosed in, for example, Japanese Patent Laid-Open No. 57-199770.

In the figure, (1) is a hoistway, (2) is a cylinder standing upright at the bottom of the hoistway (1) and filled with oil (3), (4) is a plunger inserted in the cylinder (2), (5) is a car coupled to the top of the plunger (4), (6) is a deceleration switch installed in the car (5), (7a) is the first floor, (7b) is the second floor , (8) is a deceleration cam fixed at a fixed distance above the floor (7a) of the first floor and fixed to the wall of the hoistway (1), (9) is a conduit connected to the cylinder (2),
(10) is a solenoid valve for rising that sends pressure oil to the pipeline (9) when it is connected to the pipeline (9), and (11) is a solenoid valve for descending that discharges oil from the pipeline (9), (12) is a hydraulic pump connected to the ascending solenoid valve (10), (13) is a motor for driving the hydraulic pump (12), and (14) is a descending solenoid valve (11).
And an oil tank connected to the hydraulic pump (12).

The conventional hydraulic elevator is configured as described above, and when a rising command is issued, the electric motor (13) rotates and the hydraulic pump (1
The solenoid valve (10) for raising is controlled while driving 2). As a result, the oil (3) in the oil tank (14) is sent from the rising solenoid valve (10) to the cylinder (2) through the conduit (9), so that the car (5) rises. When a descending command is issued, the descending solenoid valve (11) is controlled and the cylinder (2)
The oil (3) therein is discharged to the oil tank (14) through the pipeline (9) and the descending solenoid valve (11), so that the car (5) descends.

The basket (5) is now landing on the second floor (7b), the first floor (7a)
When a down command is issued by a call from, the descent is started as described above and a predetermined high speed is reached. Basket (5) is on the first floor (7a)
When reaching a point a certain distance before, the deceleration switch (6) engages with the deceleration cam (8). With this, a deceleration command is issued from a control device (not shown), the flow rate of the descending solenoid valve (11) is controlled, and the car (5) starts deceleration. The car (5) descends at a low speed after deceleration, and when it reaches the first floor (7a), a stop command is issued, and the car (5) is placed on the first floor (1a).
Land on.

However, in the hydraulic elevator, the viscosity changes when the temperature of the oil (3) changes, and increases as the oil temperature decreases. Therefore, even if an operation command is given to the descending solenoid valve (11), the time required for flow rate control becomes long. As a result, the deceleration decreases and the distance required for deceleration increases. Further, as the oil temperature rises, the viscosity of the oil (3) becomes lower, the flow control time becomes shorter and the deceleration becomes larger and the deceleration distance becomes shorter.

On the other hand, if the position of the deceleration cam (8) that gives the deceleration command is set to the shorter deceleration distance, the deceleration cam (8) may be stopped when the oil temperature drops, so that the deceleration cam (8) is stopped. The position of () is generally fixedly set assuming the average value of the oil temperature. Therefore, when the oil temperature is high, the time required for low speed traveling from the operating position of the descending solenoid valve (11) to the stop of the car (5) becomes long.

Therefore, when the oil temperature is detected and the deceleration switch (6) is engaged with the deceleration cam (8), a deceleration command is generated after a time corresponding to the oil temperature (hereinafter referred to as deceleration start point control), and the oil temperature is changed. When the oil temperature is low, the deceleration start is accelerated, and when the oil temperature is high, the deceleration start is delayed.

[Problems to be Solved by the Invention]

In the conventional hydraulic elevator control device as described above,
When the deceleration switch (6) engages the deceleration cam (8),
Since the deceleration command is issued after the time corresponding to the oil temperature, the operating performance improves, but the cost increases. on the other hand,
Some hydraulic elevators do not have deceleration start point control, so there is a problem that the number of control devices is two. Also, if the addition of deceleration start point control is requested after the hydraulic elevator is installed,
There is also a problem that the control panel needs to be changed drastically.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a control device for a hydraulic elevator that can easily cope with a case where deceleration start point control is performed and a case where deceleration start point control is not performed.

[Means for Solving the Problems]

A control device for a hydraulic elevator according to the present invention is provided with an operation control device for controlling the operation of a car and a separate operation control device for detecting the oil temperature, the car load and the car speed to delay the start of deceleration. An independent operation setting means that has a deceleration control device that calculates an output and outputs an abnormal signal, connects the two with a transmission line, and sets the operation control device to an independent state when the operation control device removes the transmission line Is provided.

[Action]

In this invention, since the operation control device and the deceleration control device are separated and connected by the transmission line, the delay time calculation and the abnormality detection related to the deceleration start point control are processed by the deceleration control point control side. If the operation is not performed, the deceleration controller can be removed, and the operation controller is set to the independent state.

〔Example〕

1 to 6 are views showing an embodiment of the present invention.
Fig. 2 is a block diagram of a hydraulic elevator, Fig. 2 is a block diagram of a control circuit, Fig. 3 is a block diagram of transmission signals, Fig. 4 is a flow chart showing deceleration delay calculation operation, and Fig. 5 is deceleration start point control operation. FIG. 6 is a flow chart showing the abnormality detecting operation, and the same parts as those of the conventional apparatus are designated by the same reference numerals.

In FIG. 1, (21) is a car speed detecting device, which is endlessly wound around pulleys (22), (23), pulleys (22) and (23) supported by a fixed part and one side of which is a car ( It is composed of a rope (24) coupled to 5) and a speedometer generator (25) driven by a pulley (23). (26) is a load sensor that detects the load pressure in the jack (2) that changes according to the load in the car (5), and (27) is the oil tank (1
An oil temperature sensor installed in 4) that detects the temperature of the oil (3).

In FIG. 2, (21a) is a speed signal from the car speed detection device (21), (26a) is a load signal from the pressure sensor (26),
(27a) is an oil temperature signal from the oil temperature sensor (27), (31) is a deceleration control device, a load detector (32) for converting the load signal (26a) into a digital signal, and the oil temperature signal (27a) Each of the detectors (32) consisting of an oil temperature detector (33) for converting the temperature, a car speed detector (34) for converting the speed signal (21a), and a microcomputer (hereinafter referred to as a microcomputer).
A deceleration delay calculation circuit (35) that calculates a deceleration delay time based on the signal of (34), an abnormality detection circuit (36) that similarly detects an abnormality in the output of each detector (32) to (34), and a deceleration delay It is composed of a signal transmission circuit (37) that transmits a signal, an abnormal signal, etc., and receives a running state signal from the operation control circuit (40) which will be described later. (38) is an operation control device,
A signal transmission circuit (39) for receiving a signal from the deceleration control device (31) and for transmitting the above-mentioned running state signal, and is composed of a microcomputer and controls the operation of the car (5) in response to a hall call and a car call. Well-known operation control circuit (4
0), the operation control circuit (40) and the deceleration control device (31) detect an abnormal signal and output a signal (“H” under normal conditions) for controlling the operation of the car (5) (41) ), OR
Gates (42), (43), and AND gates (44)-(48)
It is composed of. (49) is a signal transmission circuit (37), (3
9) A transmission line consisting of a cable that connects the two, and is normally pulled up to "H" when there is no signal transmission or when there is a break. (50) is an electric motor control circuit for controlling the rotation of the electric motor (13), (51) is a high speed solenoid valve control circuit for giving a high speed operation command to the solenoid valve (10) for rising, (5
2) is a low-speed solenoid valve control circuit for raising that also gives a low-speed operation command, (53) is a high-speed solenoid valve control circuit for lowering that gives a high-speed operation command to the lowering solenoid valve (11), and (54) is also a low-speed operation command It is a low-speed solenoid valve control circuit for lowering.

In FIG. 3, (37a) is a signal transmitted by the signal transmission circuit (37),
It consists of a 5-bit deceleration delay time signal TIME and a 1-bit abnormality detection signal IJYO. (39a) is a signal transmission circuit (3
The output signal of 9) is composed of a 1-bit ascending signal A, a descending signal B, a deceleration preparation signal C, a deceleration signal D, a high-speed traveling signal E, and a low-speed traveling signal F.

Next, the operation of this embodiment will be described with reference to FIGS. Of these flow chart programs, the one shown in FIG. 4 is for the deceleration delay calculation circuit (35), the one shown in FIG. 5 is for the operation control circuit (40), and the one shown in FIG. 36) are stored in the memory (not shown).

Since the output of the abnormality control circuit (41) is "H" during normal operation, when the call registration circuit (not shown) registers a call for the upper floor, the operation control circuit (40) responds to this. A signal is output and the output of the AND gate (44) becomes "H". With this, the electric motor control circuit (50) operates, the electric motor (13) rotates, and the hydraulic pump (12) is driven. Further, the rising high speed solenoid valve control circuit (51) operates from the OR gate (42) via the AND gate (45), and the rising low speed solenoid valve control circuit (52) operates via the AND gate (46). , The solenoid valve for raising (10) is controlled. Now the oil tank (14)
The oil (3) is sent from the rising solenoid valve (10) to the cylinder (2) through the pipe (9), so that the car (5) rises at high speed. At this time, the safety of the traveling of the car (5) is confirmed by the abnormality control circuit (41), and when an abnormality is detected, the output of the abnormality control circuit (41) becomes "L", so the AND gate ( The outputs of 44) to (48) become “L”, the control circuits (50) to (52) become inoperative, and the car (5) stops.

When the car (5) approaches the floor to be stopped and the deceleration switch (6) engages with the deceleration cam (8), the deceleration preparation signal (6a) is output and the signal transmission circuit (39) transmits It is input to the deceleration delay calculation circuit (35) via the line (49) and the signal transmission circuit (37).

Here, the deceleration preparation signal (6a) is input at step (61), and the speed signal (21a) is input at step (62).
The load signal (26a) is detected in 3) and the oil temperature signal (27a) is detected in step (64). And step (65)
Then, based on these signals (21a), (26a), (27a),
The deceleration delay time is calculated, and the sending signal (37a) shown in FIG. 3 (a) is output from the signal transmission circuit (3) at step (66).
7), is transmitted to the operation control circuit (40) via the transmission line (49) and the signal transmission circuit (39). Here, if the deceleration delay time signal TIME is 50 milliseconds per bit, a maximum delay of 1.55 seconds is possible.

The transmission signal taken into the operation control circuit (40) is processed as shown in FIG.

In step (71), it is judged whether or not the deceleration preparation signal (6a) is input, and if it is input, in step (72) the sending signal (37) is sent.
Enter a). In step (73), it is judged whether all the input signals are "H". If there is no abnormality in the transmission line (49), the signal data (37a) are not all "H", so the process proceeds to step (74), and the abnormality detection signal IJYO of the signal (37a) is judged to be normal (IJYO If "1") is determined, the deceleration delay time signal TIME is transferred to the counter CONT in step (75). Then, in step (76), it is judged whether the counter CONT is zero, and if it is not zero, the counter CO
Decrement 1 from NT and return to step (76), then step (7
Repeat steps 6) and 77), and at step (76), use the counter CON
When it is determined that T has become zero, the process proceeds to step (78) and the deceleration command signal is output. In this way, when the deceleration command signal is output after the delay time, the shutoff command signal is sent to the ascending high-speed solenoid valve control circuit (51) via the OR gate (42) and the AND gate (45), and the ascending command signal is issued. Solenoid valve (10)
Operates, the amount of oil delivered to the cylinder (2) decreases, and the car (5) decelerates to run at a constant low speed. When the car (5) comes to the stop position point, a stop command signal is output, the rising low-speed solenoid valve control circuit (52) is also cut off via the AND gate (46), and the car (5) is stopped.

In the descending operation, the descending high-speed and low-speed solenoid valve control circuits (53) and (54) are controlled as in the ascending operation, and the speed signal (21
A), deceleration start point control based on the load signal (26a) and the oil temperature signal (27a) is performed.

Next, the case where there is no deceleration start point control will be described.

In this case, the deceleration control device (31) and the transmission line (49) are not provided, so that the contents of the signal received by the operation control circuit (40) from the signal transmission circuit (39) are all "H". The operation control circuit (40) recognizes this signal state and judges that there is no deceleration start point control, so the step (7
Proceed from step 3) to step (78). That is, when the deceleration command signal (6a) is issued, the deceleration command signal is immediately issued and the car (5) starts deceleration. Therefore, the low-speed running time will be long. Where the step (73)
Constitutes an independent operation setting means.

Next, the case where the input signal to the deceleration control device (31) is abnormal will be described.

Now, for example, something is wrong with the pressure sensor (26),
It is assumed that there is no person in the car (5), but the load signal (26a) is output when there are passengers over the capacity.
In the flow control valve, when the load pressure on the jack side decreases, the time from the shut-up of the high-speed solenoid valve control circuit (51) to the actual operation of the solenoid valve for lift (10) becomes longer, which results in deceleration time. As the car becomes longer, the low speed traveling time of the car (5) becomes shorter. On the other hand, the signal from the load detector (32) input to the deceleration delay calculation circuit (35) is a signal under a heavy load. Therefore, a predetermined deceleration delay time is output by the calculation. For this reason, the car (5) operates in such a manner that the deceleration start is delayed and the deceleration is slow,
Since the speed is high even when the vehicle comes to the regular stop position point, the stop does not become a normal stop, but it will stop by going too far. As a result, in the worst case, if it passes through the door zone and the door opens in this state, it is extremely dangerous. Therefore, an abnormality detection circuit (36) is provided and processed as shown in FIG.

That is, the load signal (26a), which is pressure data, is fetched at step (81), and the load signal (26a) is fetched at step (82).
Is compared with a predetermined pressure range (for example, from no load to capacity) data (not shown), and if it is judged to be within the range, the abnormality detection signal IJYO is set to "1" at step (83) and out of range. If it is determined that the signal transmission circuit (37), transmission line (4)
9) and the signal transmission circuit (39) through the operation control circuit (4
0). When the abnormality detection signal IJYO is judged to be "0" at step (74) in Fig. 5, the process proceeds to step (78), where the deceleration command signal is immediately issued and the deceleration delay time becomes zero. (5) does not go too far, ensuring safety.

The rising signal A is added to the sending signal (39a) in FIG. 3 (b).
And the signal B during descent are input on the deceleration control device (31) side when the car speed is too low due to a failure of the car speed detector (34) or when a reverse running signal is output. This is because the car speed is abnormally detected by the same means as in FIG. 6, an abnormal signal is generated, and the deceleration start point control is invalidated.

In the above embodiment, the deceleration control device (31) is connected to the operation control device (38) via the transmission line (49) using a cable, but it may be connected to the bus on the board. In this case, the deceleration control device (31) is a large-scale integrated circuit (LSI),
Since it is composed of an integrated circuit (IC) or a one-chip microcomputer, if an IC socket is provided, it is possible to easily cope with the presence or absence of deceleration start point control.

〔The invention's effect〕

As described above, in the present invention, the operation control device and the deceleration control device are separated, and these are connected by the transmission line, so that the calculation of the delay time and the abnormality detection related to the deceleration start point control are processed on the deceleration control device side. When the deceleration start point control is not performed, the deceleration control device may be removed, and the operation control device is set to an independent state, which has an effect that it is possible to easily cope with the case where the deceleration start point control is performed and the case where it is not. .

[Brief description of drawings]

1 to 6 are views showing an embodiment of a hydraulic elevator control device according to the present invention. FIG. 1 is a block diagram of the hydraulic elevator, FIG. 2 is a block diagram of a control circuit, and FIG. 4 is a flow chart showing deceleration delay calculation operation, FIG. 5 is a flow chart showing deceleration start point control operation, FIG. 6 is a flow chart showing abnormality detection operation, and FIG. 7 is a conventional flow chart. It is a block diagram which shows a hydraulic elevator. In the figure, (5) is a car, (6) is a deceleration switch, (6a) is a deceleration preparation signal, (8) is a deceleration cam, (21) is a car speed detection device, (21a) is a speed signal, (26). Is a pressure sensor, (2
6a) is a load signal, (27) is an oil temperature sensor, (27a) is an oil temperature signal, (31) is a deceleration controller, (38) is an operation controller,
(49) is a transmission line, (50) is a motor control circuit, (51) is a rising high-speed solenoid valve control circuit, (52) is a rising low-speed solenoid valve control circuit, and (53) is a descending high-speed solenoid valve control circuit. , (54)
Is a descending low-speed solenoid valve control circuit. The same reference numerals in the drawings denote the same parts.

Claims (1)

[Claims] 1. An operation control device for controlling the operation of a car according to a hall call and a car call and outputting an operation state signal indicating this operation state, and an oil temperature and a car provided separately for this operation control device. A deceleration control device that detects a load and a car speed and calculates a delay time signal and an abnormal signal from when the car reaches a point at a certain distance in front of the floor where the car should stop to when the car starts deceleration,
A transmission line for connecting the operation control device and the deceleration control device to transmit the operation state signal, the delay time signal and the abnormality signal, and the operation control device provided in the operation control device and removing the transmission line. A control device for a hydraulic elevator, comprising independent operation setting means for setting an independent state.