JPS643793B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device for rescue operation of an elevator.

When an elevator car abnormally stops outside the door opening zone, a widely used method is to detect this, switch the car to low speed, and drive the car to the door opening zone of the nearest floor to rescue passengers from inside the car. ing. Conventionally, this rescue operation was performed by driving in a predetermined direction (usually in a descending direction).

When a car abnormally stops in the middle of a floor, there are many factors such as failure of equipment used and poor contact. Some of the above equipment, such as driving direction relays and position detection devices, are installed independently for ascending and descending operations, but these dedicated equipment for ascending and descending operations are usually economical. It is commonly used for both normal driving and rescue driving. Therefore, if the driving direction of the rescue operation is predetermined to be, for example, a descending operation, the car may stop in the middle of the floor due to a failure of the descending operation equipment such as the descending operation direction relay or the descending operation position detection device. If this happens, it will be impossible to conduct a rescue operation.

The present invention solves the above-mentioned drawbacks, and aims to provide an elevator rescue operation device capable of reliably carrying out a rescue operation of a car even when equipment dedicated to upward operation or downward operation fails.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In the figure, EL is an elevator car, which is suspended from one end of a rope ROP wrapped around a hoist TR driven by a single electric motor, and balanced by a lift weight CW attached to the other end. Tsute hoistway
This is for raising and lowering the SH. GAT is a car door that opens and closes the entrance to car EL, DOR is a landing door installed at landing COR, PB is a push button installed at landing COR, and SP receives a signal from this push button PB to operate car EL. This is a control circuit that determines the direction, and when ascending operation, the ascending operation relay is connected via OR element U.
UR is energized, and during descending operation, descending operation relay DR is energized via OR element D. DC is the drive circuit, when the rising operation relay UR is energized,
The hoist TR is driven to raise the car EL, and when the descending operation relay DR is energized, the hoist TR is driven to lower the car EL. UR1 and UR2 are normally open contacts that close when the upward operation relay UR is energized, and DR1 and DR2 are normally open contacts that are closed when the downward operation relay DR is energized. Outputs a “1” signal. DZS is a door open zone detection switch installed on the car EL that engages the cam DZC installed on the hoistway SH when the floor of the car EL is within a predetermined range above and below the floor of the landing (COR). outputs a signal of logic level "1". In other words,
The door opening zone detection switch DZS and the cam DZC function as a door opening zone detection device 20. DZN is an inverter that inverts the output of the door open zone detection switch DZS to "1" when it is "0".
RN is a NOR gate that outputs "1" when both contacts UR2 and DR2 are open, that is, when car EL stops, RA is an AND gate to which the outputs of inverter DZN and NOR gate RN are respectively input, and EMS is This flip-flop is set by the output "1" of the AND gate RA, outputs "1" to the output terminal Q, and is reset by the output "1" of the door opening zone detection switch DZS.

That is, the above inverter DZN, contact UR2,
In the circuit consisting of contact DR2, NOR gate RN, AND gate RA, and flip-flop EMS, flip-flop EMS is set by a logic level "1" signal from AND gate RA when the car EL stops outside the door opening zone. It functions as a rescue command device 21 that generates a rescue command signal EMa.

In the figure, 1 to 4 are input signal terminals. Terminal 1 receives a logic level "1" signal when normally open contact UR1 is closed during upward operation, and terminal 2 receives a signal of logic level ``1'' when normally open contact DR1 is closed during downward operation. Similarly, the signal “1” is
Similarly, a signal of "1" is applied to the terminal 3 when the car EL is in the door opening zone, and the rescue operation command signal EMa is applied to the terminal 4. 5 and 6 are AND gates, 7 is set input terminal S, reset input terminal R
The flip-flop is equipped with a flip-flop which enters a set state when passing through a door opening zone during upward driving, and functions as driving direction storage means which outputs a signal of logic level "1" to its output terminal Q. 8 and 9 are
AND gate, 10 is an inverter. The AND gate 8 issues a descending operation command 8a when its output is at logic level "1", and the AND gate 9 issues an ascending operation command 9a when its output is also at "1", and the operation relays UR and DR in the corresponding directions are activated. energize.
In other words, it functions as a rescue operation circuit 22.

Next, the operation of this embodiment will be explained based on FIG. 2.

If the car EL moves upward from the door opening zone, the upward operation relay UR is energized and the contacts
UR1 is closed and the output 20a of the door opening zone detection device 20 becomes "1", so the AND gate 5 becomes logic level "1" while in the door opening zone.
The flip-flop 7 is set by generating the output 5a of the logic level "1" at the output terminal Q. Now, if the device dedicated to the lift operation fails during the lift operation and the car EL stops outside the door opening zone, the rescue operation command signal EMa, that is, a signal of logic level "1" is applied to the terminal 4. In other words,
Since it is outside the door opening zone, the output signal 20a of the door opening zone detection device 20 is "0" and the inverter
The output of DZN becomes "1", and since the car EL stops, both contacts UR2 and DR2 are opened, and the output of NOR gate RN becomes "1". Therefore, the output RAa of the AND gate RA becomes "1" and sets the flip-flop EMS. As a result, the rescue command signal EMa becomes logic level "1". At this time, the output 7q of flip-flop 7
Since the output 8a is also at the logic level "1", the output 8a becomes the logic level "1", a descending operation command is generated, and the car performs a rescue operation in the descending direction. The flip-flop 7 remains set until the AND gate 6 generates an output 6a of logic level "1", that is, until the car moves downward within the door opening zone. Now, when the car EL reaches the door opening zone, the terminal 3 becomes "1", the flip-flop 7 is reset and the output 7q becomes "0". Therefore, the descending operation command 8a becomes "0", the descending operation is interrupted, and the car EL is stopped. On the other hand, the flip-flop EMS is reset when the car EL stops within the door opening zone, and its rescue operation command signal EMa becomes "0".

Therefore, even if the device dedicated to upward operation is out of order, the device dedicated to downward operation can drive the car to the door opening zone of the nearest floor, open the door, and rescue passengers from inside the car. Even if the car stops outside the door opening zone due to a failure of the descending operation equipment during descending operation, the car can be rescued to the door opening zone of the nearest floor using the equipment dedicated to ascending operation in the same way. . (Fig. 3) In addition, when the elevator speed control device malfunctions and the elevator goes too far and stops outside the door opening zone, if the stopping position is between the lowest floor and the floor above it, If a rescue operation is performed in the descending direction, there is a risk that the vehicle will go further past the bottom floor and collide with the shock absorber. However, according to the embodiment, since the rescue operation is performed in the opposite direction to the direction of operation immediately before the abnormal stop, even if the speed control device is malfunctioning, there is a possibility that the rescue operation will overshoot the terminal floor and collide with the shock absorber. Therefore, a highly safe rescue operation can be performed.

As explained above, in this invention, when a car abnormally stops between floors, the rescue operation is performed by causing the car to run in the opposite direction to the driving direction when passing through the door opening zone immediately before the abnormal stop, and the rescue operation The signal for stopping the car is the signal from the door opening zone detector, so even if the equipment dedicated to up or down operation fails, the car can be reliably stopped in the door opening zone and the passenger can be safely stopped. Not only can a rescue operation be performed, but also a highly safe rescue operation can be performed even when the speed control device is out of order.

[Brief explanation of the drawing]

Fig. 1 is an electric circuit diagram showing an embodiment of an elevator rescue operation device according to the present invention, Fig. 2 is a timing diagram of the output of each device in Fig. 1 during rescue descending operation, and Fig. 3 is during rescue ascending operation. 2 is a timing diagram of each output of the device in FIG. 1. FIG. 1... Ascending operation signal input terminal, 2... Descending operation signal input terminal, 3... Door opening zone signal input terminal, 4... Rescue operation command signal input terminal, 5, 6...
...AND gate, 7...Flip-flop (driving direction storage means), 8, 9...AND gate, 10...
...Inverter, EL...Car, DZS...Door zone detection switch, DZC...Cam, COR...Passenger area,
20...Door open zone detection device, 21...Rescue command device, 22...Rescue operation circuit.

Claims (1)

[Claims] 1. In a device in which when a car driven by one electric motor stops between floors, the car is restarted and runs to a predetermined door opening zone for each floor, where the door opening zone is a door opening zone detection device that detects when the car is located in the door opening zone; a driving direction storage device that updates and stores the latest driving direction every time the car passes through the door opening zone; A rescue command device that generates a rescue command signal when the car stops outside the door zone, and when the rescue command signal is issued, the car is driven in the opposite direction to the driving direction stored in the driving direction storage device, and the car is driven in the door opening zone. A rescue operation device for an elevator, comprising a rescue operation circuit that stops the car based on a detection signal from a detection device.