JPS6153979B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device for group management of elevators.

Among the group control elevators that manage multiple cars as a group, there is one called a staggered departure system. This improves service to all floors by causing the car to depart after the scheduled departure time has elapsed, regardless of whether there is a call from a predetermined departure floor (usually the first floor), and responding to calls en route in sequence. It also aims to equalize the situation. In such group control elevators, when traffic is quiet, all cars are normally kept waiting at the departure floor to prevent cars from running unnecessarily. Then, when a hall call occurs, the car designated as the first car departs. However, if the first car is set to depart immediately when a hall call occurs, the next car designated as the first car will also leave, and in the end all cars will depart. The car is set to depart when the scheduled departure time expires, such as after a certain period of time has elapsed since the preceding car left the departure floor. Normally, this departure time is set to be slightly longer than the time from when the car departs from the departure floor to when the car responds to a hall call at a given floor. By setting in this way, it is possible to prevent unnecessary departures of several cars from the departure floor in response to one hall call.

However, even if a number of cars are on the departure floor and a waiting passenger on an intermediate floor registers a landing call, the car will not depart from the departure floor until the departure time has expired, resulting in a long wait for the waiting passenger. This may result in you having to wait.

This invention is intended to improve the above-mentioned problem.When a hall call occurs on an intermediate floor other than the departure floor, if there is no running car, the first car waiting on the departure floor will be canceled regardless of the departure time. It is an object of the present invention to provide a group management device for elevators that allows elevators to depart from each other, thereby improving service.

Hereinafter, an embodiment in which the present invention is applied to a case where three cars, A to C, are installed will be described with reference to FIGS. 1 to 3. However, Figures 1 and 3 are common to all, and Figure 2 shows the one for machine A. Note that the numbers with A to C added to the end of the codes are for cars A to C, respectively, and those without the numbers are common to each car.

In the figure, (+) and (-) are DC power supplies, 1a is a car position contact that closes when the car is on the first floor, 2 is a starter selection relay, 2a and 2b are its normally closed contacts, 2
c and 2d are normally open contacts, 3 is a hall call detection relay contact that closes when a hall call is detected, 4 is a car call detection relay contact that closes when a car call is detected, and 5 is an energized contact. 5a is a normally closed contact, 6 is a departure command relay that gives a departure command to a car.
Traveling relay contact that closes when the basket travels, 7
is the running car detection relay, 7a is its normally closed contact,
8 is a time-limited relay that operates after a predetermined time (for example, 20 seconds) when it is energized and returns immediately when it is de-energized, and 8a is its normally open contact.

Next, the operation of this embodiment will be explained.

Now, cars A to C are all waiting on the first floor, and assuming car A is designated as the first car, car position contacts 1aA, 1bA, 1aB, and 1bC are closed. In addition, the starting selection relay 2A is energized,
Contact 2cA is closed and self-maintaining. Also,
Since the contacts 2aA and 2bA are open, the advance selection relays 2B and 2C of the B and C cars are not energized. In addition, the contact 2dA is also closed.

If a hall call does not occur in this state, the hall call detection relay contact 3 will not close, so the departure command relay 5A will not be energized, and Car No. A will not depart.

When a hall call occurs, the hall call detection relay contact 3 is closed. If the departure time has not expired at this time, the time relay contact 8a is open as will be described later, so the departure command relay 5A is not energized and the A-car does not depart. If the departure time has expired, the time relay contact 8a will close, so
The departure command relay 5A is energized by the (+)-8a-3-1bA-2dA-5A-(-) circuit, and the A-car departs. Further, when there is no running car, all running relay contacts 6A to 6C are open, running car detection relay 7 is deenergized, and contact 7a is closed. Therefore, even if the departure time has not expired, the departure command relay 5A
is energized and Unit A departs.

When Car No. A departs, the running relay contact 6A closes, so the running car detection relay 7 is energized.
Contact 7a is open. When Unit A leaves the first floor,
Since the car position contact 1aA is open, the starter selection relay 2A is deenergized, the contacts 2aA and 2bA are closed, and the contacts 2cA and 2dA are opened. with this,
In the (+)-1aB-2aA-2bC-2B-(-) circuit, the starter selection relay 2B is energized and the contact 2cB
It maintains itself by closing. In addition, contact 2aB,
2bB is open. Car B is now designated as the starter. However, as can be easily understood by rereading Figure 2 for Car B, when the departure time expires, the time limit relay contact 8a closes, but when there is no running car, the running car detection relay contact 7a closes. Until this is achieved, the departure command relay 5B will not be energized and the B aircraft will not be able to depart. On the other hand, when Car A leaves the first floor, car position contact 2bA opens, so departure command relay 5A is deenergized (However, if Car A departs before the departure time expires, both contacts 8a and 7a open. Therefore, when aircraft A departs, departure command relay 5A is activated.
is deactivated. ), and the contact 5aA is closed. Now, the time relay 8 is energized by the circuit (+)-5aA-5aB-5aC-8-(-) and the counting of the departure time is started. When 20 seconds have elapsed since the time relay 8 was energized, the contact 8a is closed.
This is the expiry of the departure time.

In addition, when a car call occurs in the car of car A while car A is on standby, car call detection relay contact 4A
is closed, so (+)-4A-1bA-2dA-5
The departure command relay 5A is energized by the A-(-) circuit, and the A-car departs immediately.

In addition, if the running relay contacts 6A to 6C are changed to contacts that close when the car is running in the up direction, if there is no car running in the up direction, if a hall call occurs even before the departure time has expired, , the departure command relay 5A is energized and aircraft A can be started.

As explained above, in this invention, in an elevator with a staggered departure system, when a hall call occurs on an intermediate floor other than the departure floor, if there is no running car, the first car will be departed regardless of the departure time. Since the departure is made from the floor, it is possible to improve the service when a hall call occurs while waiting.

[Brief explanation of the drawing]

FIG. 1 is a first car selection circuit diagram showing an embodiment of an elevator group management system according to the present invention, FIG. 2 is a departure command circuit diagram, and FIG. 3 is a traveling car detection and departure time detection circuit diagram. 1aA, 1bA, 1aB, 1aC...car position contacts for cars A to C, 2A to 2C...same forward selection relay, 3...hall call detection relay contact, 5A...
... Departure command relay for car No. A, 6A to 6C... Running relay contacts for cars A to C, 7... Running car detection relay, 8... Time-limited operation type time-limited relay.

Claims (1)

[Scope of Claims] 1. A system in which a plurality of cars are made to wait on a departure floor, and when a hall call occurs, the first car departs after the scheduled departure time, which detects the running of the plurality of cars and detects the running of the car. a running car detection means that operates when it detects that there is no running car, and a departure command means that causes the first car to depart regardless of the departure time when the detection means is activated and the hall call occurs. Elevator group control device equipped with. 2. An elevator group management device according to claim 1, wherein the running car detection means operates when detecting that there is no car running in an upward direction.