JPS6131024B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling an elevator, and particularly to a method for controlling an elevator in which a plurality of cars are installed.

In the current social situation where energy conservation is discouraged, buildings with multiple elevator facilities often have some percentage of all elevators idle for the purpose of energy conservation. Particularly in a country like Japan, which is dependent on energy resources from overseas, it is extremely difficult to resolve this situation, and it has become well-established in general society through the mass media that some inconvenience is irreplaceable in terms of energy conservation. It is estimated that such demands will continue in the future.

Conventionally, the method of stopping elevators for energy saving is to stop several of the elevators, but in most cases, this is done at the end of the elevator hall or at a specific elevator such as one for passenger cargo. is common.

However, as mentioned above, it is undesirable for elevators to remain inactive for a long period of time, both mechanically and electrically. In other words, mechanically, it is composed of a large number of mechanically driven devices, such as the hoisting machine used to move the elevator up and down, and the speed governor used as a safety device for various mechanical devices installed in the hoistway. The structure is such that each driving part can operate smoothly and have good lubricity during each drive.
In addition, the ropes, lifting rails, etc. are designed to have a lubricating effect including rust prevention. However, as these effects are stopped due to long-term suspension, the mechanical lubrication effect is stopped and not only the rust prevention effect is reduced, but also the life of the mechanism itself is shortened due to inactivated old oil etc. also occurs. Also, in the switching contacts used in electrical circuits, the self-cleaning function of the contacts is lost because the current does not switch or close, and the oxide film on the surface is not destroyed by collisions between the contact surfaces, and the self-cleaning function of the contacts is lost. The adhesion of dust inside and the formation of an oxide film on the surface due to gas progress, resulting in a decrease in contact reliability. Leaving the system out of service for such a long time both mechanically and electrically may degrade the performance of the entire system and even shorten its lifespan.

The present invention has been made in order to eliminate such a troublesome phenomenon, and instead of fixing the elevator car to be stopped, it automatically switches the idle state of multiple elevator cars one after another, so that the next elevator car can be moved to the next car before the above-mentioned problem occurs. An object of the present invention is to provide a control method for an elevator that operates so as to make the elevator car idle.

The present invention will be explained below based on the drawings to which the present invention is applied.

For the sake of convenience, the specific embodiment will be described based on a case where four cars are installed (cars A to D).
FIG. 1 shows a block diagram of a switching signal generating device, in which T is a clock type time switch which generates a signal at regular intervals. The CU uses a ring counter device to send the signal sent from the clock type time switch T to only one of the receivers A1, B1, C1, and D1 installed for the four cars. ing. For example, when the first signal is sent from the clock type time switch T, the signal continues to be sent only to the receiver A1. When the second signal is sent after a certain period of time has elapsed, the signal to receiver A1 is cut off and the signal continues to be sent only to receiver B1. In this way, the stages are sequentially advanced, and when the next signal after which the receiver D1 has been activated comes, the receiver A1 is activated again, so that the operation is repeated. Figure 2 shows the elevator stop command circuit, P and N are power supplies, S
are power switches, A1 _1a , B1 _1a , C1 _1a , D1 _1a
are the a contacts of each of the receivers A1, B1, C1, and D1 in FIG. RA, RB, RC, and RD indicate the stop command relays for each of the four cars,
RA _1a , RB _1a , RC _1a , and RD _1a are the stop command relays
The a-contacts of RA to RD, HA _1a , HB _1a , and HC _1a are the a-contacts of a reference floor return relay (not shown) for each car, and are configured to close when the car returns to the reference floor. For example, to explain the operation of the stop command relay RA of car No. A, when the receiver A1 in FIG. 1 is energized, the a contact A1 _1a is closed. At this time A
If the unit is stopped on the standard floor, P-S-A1 _1a -
The stop command relay RA is immediately energized by the HA _1a - RA - N circuit, but if the train is running or stopped on a floor other than the standard floor, the a contact of the standard floor return relay is energized.
HA _1a remains open and the pause command relay RA
remains inactive. In this manner, the suspension command is issued to the car only when the conditions of energizing the receiver A1 and closing the reference floor return relay contact are satisfied. The a-contact RA _1a is a self-holding a-contact of the pause command relay RA, and is used to ensure that once it is energized, it continues to operate until the signal to the receiver A1 is cut off. Below B, C,
Since the circuit configuration for machine D has the same function, the explanation will be omitted. Figure 3 is a circuit diagram for stopping the car. PA, PB, PC, and PD are manually operated stop switches installed in each car. This switch is installed in such a way that the power supply to the PC is cut off and the PC goes into hibernation mode by operating this switch.This figure shows the case where the PC goes into hibernation mode when the circuit is opened. .

RA _1b , RB _1b , RC _1b , and RD _1b are the b contacts of each of the stop command relays RA, RB, RC, and RD shown in Fig. 2. As shown in Fig. 3, the b contact RA _1b is connected in series with the switch RA.
The b contact RB _1b is connected in series with the switch PB, the b contact RC _1b is connected in series with the switch PC, and the b contact RB _1b is connected in series with the switch PD. Therefore, to explain the case of Unit A, when the stop command relay RA is energized,
Since RA _1b is opened, it has exactly the same function as opening the already installed halt switch PA, and the car is put into a halt state. Also, set the output generation time of the clock type time switch T to occur during off-peak hours as much as possible, and set the next signal generation time to an integer multiple of 24, such as 24 hours or 48 hours later, so that the switching time can always be set. It can be made constant.

As explained above, according to the present invention, all the cars can be brought to a resting state on average, so by appropriately selecting the switching cycle, the entire elevator system can be constantly activated both mechanically and electrically. It is possible to provide an elevator control method that can keep the mechanical equipment stable and at the same time achieve an energy saving effect.

[Brief explanation of the drawing]

The figures show a block diagram and a circuit diagram to which the present invention is applied. Fig. 1 is a block diagram of a switching signal generator, Fig. 2 is an elevator stop command circuit diagram,
FIG. 3 is an elevator stop circuit diagram. T...Time switch, A1, B1, C1, D
1... Receiver, HA _1a , HB _1a , HC _1a , HD _1a ... Standard floor return relay, RA, RB, RC, RD... Pause command relay, RA _1a , RB _1a , RC _1a , RD _1a ... Pause command relay a contact, RA _1b , RB _1b , RC _1b , RD _1b ...
...B contact of the pause command relay.

Claims (1)

[Claims] 1. In a car in which a plurality of cars are installed in parallel, a time switch common to the plurality of cars installed in parallel and a receiver corresponding to each car are provided, and one of these receivers 1. A control method for an elevator, which operates sequentially in response to signals from a switch, and sets the elevator car to a rest state when the elevator car corresponding to the operated receiver lands on a predetermined floor.