JPH0699093B2 - Hydraulic elevator controller - Google Patents

Description

TECHNICAL FIELD The present invention relates to a control device for a hydraulic elevator.

[Conventional technology]

2 and 3 illustrate a hydraulic circuit and an electric circuit of a conventional hydraulic elevator control device. In FIG. 2, (1) is a hydraulic jack and (2) is a car driven by the hydraulic jack. , (3) is a pump for supplying pressure oil to the hydraulic jack (1), (3a) is its electric motor, (4) is a pressure reducing valve on the rising side, (5) is an electromagnetic rising control valve, and (6) is a relief. Valve, (7) check valve, (8) electromagnetic check valve, (9) down pressure reducing valve, (10) electromagnetic down control valve, (11) tank, (12) tank (11 ) Low temperature detector,
(13) is a high temperature detector, (14) is a hoistway provided with a hydraulic jack (1), (15) is a landing provided at this,
(16) is an oil temperature raising circuit connecting the pump (3), the pressure reducing valve (4) on the rising side, the electromagnetic rising control valve (5), and the tank (11),
(17) is a car position detection device, (17a) is a switch fixed to the car (2), (17b) is a normally open contact of the switch (17a), (17c) is fixed to the hoistway (14) Switch (1
A cam arranged corresponding to 7a) engages the switch (17a) when the car (2) faces the landing (15) and is in the door zone.

Further, in FIG. 3, (12a) is a normally open contact of the low temperature detector (12), (13a) is a normally closed contact of the high temperature detector (13), and (1
8) is a control mechanism consisting of an electromagnetic relay, (18a) is its normally open contact, (18b) is also the normally open contact of the control mechanism (18), (1)
9) is a temperature raising device that energizes the pump (3) to circulate pressure oil in the oil temperature raising circuit to raise the oil temperature, (20a) is a normally closed contact point that opens when there is a floor alignment command, (21a) Is a normally closed contact that can be called and that opens when the running conditions are met.

That is, FIG. 2 shows a hydraulic circuit diagram of a well-known hydraulic elevator, in which pressure oil is supplied to the hydraulic jack (1) by the pump (3) to raise the car (2) and the hydraulic jack (1). ) Is the pressure oil is discharged from the cage (2)
Moves down. Further, if the temperature of the pressure oil decreases, the ride comfort of the car (2) may deteriorate due to changes in viscosity, or the car (2) may not stop at a predetermined position corresponding to the landing (15). When the pressure oil temperature is lowered to prevent such a problem, the contact (12a) is closed and the contact (13a) is also closed. Moreover, the car (2) faces the landing (15) and the cam (17c) switches (1
If 7a) is in the pressed position, the contact (17b) is closed.

As a result, (+)-(12a)-(13a)-(17b)-
The control mechanism (18) is urged by the circuit of (20a)-(21a)-(18)-(-) to close the contact (18a), and the control mechanism (18) is held by itself. Further, the contact (18b) is closed, and the temperature increasing device (19) is energized by the circuit of (+)-(18b)-(19)-(-) to increase the oil temperature by the pump (3). Is operated and the oil temperature rises. When the oil temperature reaches the specified value, the high temperature detector (13) operates and the contact (13a)
Is released, the control mechanism (18) is deactivated, and the temperature raising device (19) is deactivated. During operation of the temperature increasing device (19), the pressure in the oil temperature increasing circuit (16) increases and reverses due to abnormalities such as incomplete adjustment of the operation of the electromagnetic increase control valve (5). It is conceivable that the stop valve (7) opens.
In this state, although the car (2) rise command is not issued, the car (2) rises unintentionally, but the car (2) is stopped at the landing (15) and the car (2) is stopped. If an emergency rise occurs when the door is opened, it may result in an accident for passengers of the hydraulic elevator. In order to prevent such an accident, when the car (2) faces the hall (15), the car (2) is accidentally lifted out of the door zone that is set within the door openable range of the car (2). It is sometimes proposed to stop energizing the pump (3) to raise the oil temperature.

[Problems to be Solved by the Invention]

In such a configuration, if the accidental rise of the car during the oil temperature rise operation is not enough to pass through the door zone, it goes above a predetermined position, and a descending floor alignment command is issued, and the contact (20
a) is opened, the temperature raising device (19) is stopped, the floor is aligned in the descending direction, the normal floor position is reached, and the contact (20a) is closed again. After that, the car moves again by the oil temperature increasing operation, and the car goes over a predetermined position and repeats floor alignment in the descending direction (hereinafter referred to as hunting).

On the other hand, even if the oil temperature raising operation is in progress, the contact point (21a) is opened when the passenger makes a call to get in, so the oil temperature raising operation is stopped.
You can drive according to the call.

When passengers board the car while the car is hunting in this way, the passengers may feel uneasy when they see it, or if drunk passengers board the car without knowing it There was a risk of injury.

The present invention has been made to solve the above-mentioned problems, and the passengers can board safely even if the car has repeated hunting due to the above-mentioned abnormality during the oil temperature rising operation, and at the time of maintenance. It is an object of the present invention to obtain a hydraulic elevator control device capable of checking this abnormality.

[Means for Solving the Problems]

A control device for a hydraulic elevator according to the present invention is provided with a hydraulic circuit for supplying pressure oil by a pump to operate a hydraulic jack to drive a car supported by the hydraulic jack to a landing, and a part of the hydraulic circuit. An oil temperature increasing circuit is provided in the oil temperature increasing circuit and a temperature increasing device is provided for increasing the oil temperature by circulating the pressure oil through the oil temperature increasing circuit by the pump when the temperature of the pressure oil becomes lower than a predetermined value. Of the car, the door close detection switch that detects that the car and the door of the hall are closed in the door zone set in the openable range of the door of the car when the car corresponds to the hall A condition that activates the temperature raising device by the activation signal and controls the temperature raising device by the operation switch even when the door close detection switch does not issue the closing signal. Those with the road.

[Action]

The control device for a hydraulic elevator according to the present invention has a condition circuit added to the oil temperature increasing circuit, and during normal operation, the oil temperature increasing circuit is energized only when the door is closed, and the door is closed during maintenance. Make it possible to check without doing it.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1 in which the same parts as those in FIG. 3 are designated by the same reference numerals.

In Fig. 1, (22) is an oil temperature rising operation condition relay having a normally open contact (22a), (23a) is a door closing contact (door closing detection contact switch which is closed when the door of the hall and the car is closed). ), (24a), (24b) are normally open contacts and normally closed contacts of an operation switching relay (not shown) that is closed during normal operation and opened during maintenance operation, and (25) indicates an operation switch A temperature raising device that raises the oil temperature by circulating pressure oil in the temperature raising circuit,
In general operation, it is possible only when the door is completely closed, and in maintenance operation it can be opened with a switch, to prevent accidental rising of the car or hunting during oil temperature rising operation. It is designed to enable safe driving without giving passengers a feeling of abnormality, and to easily check for abnormalities during maintenance.

Now, it is assumed that the oil temperature is lowered during the normal operation, the contact (12a) is closed, and the contacts (13a), (17b), (20a), and (21a) are closed. That is, it is assumed that the vehicle is stopped at the regular position in the door zone and waiting. At this time, if the electromagnetic rise control valve (5) is not properly adjusted, the door closing contact (23a) is closed when the door is closed, so the oil temperature rising operating condition relay (22) Energized, the control mechanism (18) is energized, and the temperature raising device (19) performs the oil temperature raising operation,
As described above, since the floor shifts upward, hunting is performed by repeating the descending direction floor alignment command. At this time, when there is a call at the floor of the car, the door opens and the contact (24a) is closed, the contact (24b) is open, and the contact (23a) is open. The relay (22) is deactivated.
Therefore, the control mechanism (18) is not energized and the oil temperature increasing operation is stopped, so that passengers can use the car without feeling any abnormality.

In general, hunting during oil temperature rising operation is due to improper adjustment of the electromagnetic rising control valve (5), which leads to raising the car. However, even if the car operates normally in this state, it is a safety problem. There is no such thing. Therefore, in this case, it is difficult to find this anomaly while the passenger gets on and off, the door is opened, and the call is repeated. For this reason, the detection is performed at the time of maintenance, but in this case, the detection can be overlooked because the door can be seen only when the door is closed. In this case, since the contact (24b) is closed during maintenance by closing the operation switch (25), the oil temperature increase operating condition relay (22) is energized and the temperature increase device (19) Can operate, and with the door open from the hall, you can check the movement of the car during oil temperature rise operation to a minute amount, and you can find defects etc.

In addition, in this embodiment, the relay contact is configured,
You may implement | achieve using a microcomputer.

〔The invention's effect〕

As described above, according to the present invention, the temperature raising device for raising the oil temperature by circulating the pressure oil in the oil temperature raising circuit is enabled only during the general operation when the door is completely closed, and During maintenance operation, it is possible to open the door with a switch, enabling safe operation without giving passengers a feeling of abnormal rise or hunting of the car during oil temperature rise operation. It is possible to realize a hydraulic elevator control device that can easily check for abnormalities.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram showing an embodiment of a hydraulic elevator control device according to the present invention, FIG. 2 is a schematic hydraulic circuit diagram showing a hydraulic elevator control device, and FIG. 3 is a conventional example corresponding to FIG. It is an electric circuit diagram of. (1) …… hydraulic jack, (2) …… car, (3) …… pump, (15) …… landing, (16) …… oil temperature rise circuit, (17) …… car position detector, ( 18) …… Control mechanism, (19) …… Temperature riser, (22) …… Oil temperature rise operating condition relay, (23a) …… Door closing contact, (24a), (24b) …… Operation changeover relay Contact, (25) …… Operation switch. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A hydraulic circuit for supplying pressure oil by a pump to operate a hydraulic jack is provided to drive a car supported by the hydraulic jack to a landing, and an oil temperature raising circuit is provided in a part of the hydraulic circuit. When the temperature of the pressure oil is lower than a predetermined value and a temperature raising device for raising the oil temperature by circulating the pressure oil in the oil temperature raising circuit is provided by the pump, When the door corresponds to the landing, the temperature of the door is detected by the closing signal of the door closing detection switch that detects that the car and the door of the landing are closed in the door zone set in the openable range of the door of the car. An oil characterized by being equipped with a condition circuit for energizing the temperature raising device and for enabling the temperature raising device to be energized by the operation switch even when the door close detection switch does not output the closing signal. Control device for an elevator.