JPH04153174A - Control unit for obliquely moving elevator - Google Patents

Abstract

PURPOSE:To ensure the safety to passengers by quickly working a brake at the time of an urgent emergency stop, and gently working the braking force of the brake at the time of an emergency stop which is not urgent. CONSTITUTION:When an urgent emergency stop condition detecting circuit 5 is operated, an electromagnetic relay UES is extinguished to lay a normally opened contact UESa in open state. When a safety circuit 2 is operated in this state, an electromagnetic relay ES is extinguished to open a normally opened contact, and a brake current IB from a brake control circuit 4 to a brake coil 3 is interrupted. However, as the normally opened contact UESa is opened, the brake current IB can not be refluxed as shown by a broken line, and the brake current IB is immediately interrupted. Thus, the braking force is also immediately increased and works so as to immediately stop an elevator. Thus, the safety to passengers can be ensured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a skew elevator, and particularly relates to a control device for a skew elevator that controls braking force on an elevator heel.

[Conventional technology]

Conventionally, as a diagonal elevator, "Unexamined Japanese Patent Publication No. 1-22069
There was a ``skew elevator'' disclosed in ``No. 1''. A general emergency stop control circuit for a skew elevator is constructed as shown in Figure $3.

In the figure, (1) is the DC power supply of the emergency stop control circuit, (2) is the elevator safety circuit, and ES is the safety circuit (2).
) The electromagnetic relay coil operates in response to the operation of ) is a brake control circuit that controls the excitation current of the brake coil, ES is a normally open contact of the above coil ES, and the brake coil (3) is controlled by the brake control circuit (4).
Controls the excitation current to be cut off.

Next, the operation of the conventional circuit according to the above configuration will be explained with reference to FIG. FIG. 4 is a conceptual diagram of the relationship between the braking force and the acceleration inside the car when the brake is activated.

As shown in FIG. 4, since the elevator is running for a certain period before time t1, the safety circuit (2) is not activated, the coil ES is in an energized state, and the normally open contact ES.

is in a closed state. Therefore, the brake control circuit (4
) is applied to the brake coil (3) to release and close the brake. However, at time t1, if some abnormality occurs in the elevator system, the safety circuit (2) is activated to cut off the excitation current to the coil ES and deenergize the coil ES. Therefore, the normally open contact ES becomes open and cuts off the brake current I8 from the brake control circuit (4) to the brake coil (3). Therefore, in a short time from time t1 to time t2, the brake force for stopping the elevator and the car increases instantaneously, bringing the elevator to an emergency stop. At this time, the deceleration inside the car is instantaneously reduced to the maximum deceleration α1 as shown in FIG.

[The invention tries to solve i! As mentioned above, when an emergency stop is applied to a diagonal elevator, unlike a normal elevator that travels vertically, the
A horizontal force F) I shown in Figure 5 acts on the passenger, and if this force is large (if the deceleration α1 is large), the passenger may fall, but in the case of an emergency stop, the force shown in Figure 4 t,
The braking operation time from t2 to t2 is required to be short, and as a result, the in-car deceleration tends to increase, and this tendency affects normal stops, resulting in discomfort to passengers every time the car stops.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a control device for a diagonal elevator that does not give a stopping shock to car passengers during normal stopping.

[Means to solve the problem]

An elevator control device according to the present invention includes: a brake mechanism that brakes an elevator running on a ramp; an fSl stop circuit that controls a car to stop while gradually increasing the braking force of the brake mechanism; and the brake mechanism. and a second stop circuit that immediately increases the braking force of the car and controls the car to stop suddenly.

[Effect]

According to this invention, the first and second stop circuits are provided which have different braking control modes for the brake mechanism, and when an emergency stop is required, the first stop circuit is activated to perform a quick braking operation. During a normal stop that does not require an emergency, the second stop circuit is activated to gently apply the braking force of the brake.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is an overall circuit diagram of a control device for a skew elevator in this embodiment. In the figure, the same reference numerals as in FIG. 3 indicate the same or corresponding parts, and detailed explanation thereof will be omitted. In the figure, (5) is an emergency stop condition pressure detection circuit, which detects, for example, the door being open or the car approaching the end of the hoistway. - The UES will follow the approach detection results,
The electromagnetic relay to be deenergized, UES, is the normally open contact of the electromagnetic relay UES, (6) is the resistor that consumes the brake current, and (7) is the brake current, which is connected to the brake coil through the resistor (7). 3) is a rectifier that returns the flow to 3).

Next, the operation of this embodiment according to the above configuration will be explained with reference to FIG. 2 as well.

First, the case of normal stop will be explained. Now, if the safety circuit (2) operates while the emergency stop condition detection circuit (5) is not operating, the electromagnetic relay ES deenergizes, the normally open contact ES opens, and the brake control circuit (4) Brake current 1. is blocked. However, at this point, the normally open contact UES of the electromagnetic relay UES is in the closed state, so the electromagnetic energy stored in the brake coil (3) gradually decreases through the resistor (6). As shown by the broken line in (a) of the figure, the brake current IB2 gradually decreases, and as a result, as shown in (b) of the figure.
As shown by the broken line, the brake F[12 also gradually increases toward a constant braking force. Therefore, the deceleration inside the car is also reduced as shown by α2 in FIG.

Next, consider an emergency stop in a state where the emergency stop condition detection circuit C5) is operating. At this time, there is a high possibility that passengers will be in a dangerous situation if the brake operation is delayed, so it is necessary to stop the elevator urgently.

First, when the emergency stop condition detection circuit (5) is activated, '
The magnetic relay UES is deenergized and the normally open contact UES becomes open. When the safety circuit (2) operates in this state, the electromagnetic relay ES is deenergized and the normally open contact ES is turned off.

is opened, and the brake current IB from the brake control circuit (4) to the brake coil (3) is cut off. However, since the normally open contact UES is open, the brake current ■ cannot flow back as shown by the broken line, and the brake current IB is
It is immediately shut off like 1B1 in a).

Therefore, the braking force increases immediately as shown by FB in FIG. 2(b), and acts to immediately stop the elevator. At this time, the deceleration within the car becomes sharp as indicated by al in (C) of FIG. 2, but it is comparable to that of the conventional system.

The brake control method described above is not limited to lobe-type skew elevators, but can be applied to general skew elevators.

〔Effect of the invention〕

As described above, according to the present invention, the first stop circuit that gradually increases the braking force for stopping the running of the elevator car, and the second stop circuit that immediately applies the braking force are provided, and the second stop circuit is provided as necessary. Since the stop circuit is configured to use different stop circuits, unnecessary sudden braking force is not applied to the car, and passenger safety can be ensured.

[Brief explanation of the drawing]

FIG. 1 is an overall circuit diagram of a control device for a skew elevator according to an embodiment of the present invention, FIG. Figure 4 is an overall circuit diagram of a conventional skew elevator control system, Figure 4 is a diagram showing the relationship between braking force and in-car deceleration in the braking operation of the conventional system, and Figure 5
The figure is a diagram showing the forces acting in the horizontal direction within the car. In the figure, (2) is a safety circuit, (3) is a brake coil, Ia is a brake current, (4) is a brake control circuit,
(5) is an emergency stop condition detection circuit, ES and IIES are electromagnetic relays, and ES, UES are normally open contacts. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] a brake mechanism that brakes an elevator car running on a ramp; a first stop circuit that controls the car to stop while gradually increasing the braking force of the brake mechanism; and a first stop circuit that immediately increases the braking force of the brake mechanism to stop the car. A control device for a diagonal elevator, comprising: a second stop circuit for controlling a sudden stop.