JP2001247265A - Elevator control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control system of an elevator capable of executing the group supervisory operation and control in safety to the collision without lowering the service to passengers. SOLUTION: In this elevator control system for controlling an elevator where plural cars are commissioned in one shaft, plural deceleration patterns are prepared, so that the car can be decelerated and landed in accordance with the deceleration pattern selected in consideration of positions of the other cars in the same shaft, when one of plural cars travels and stops at a destination floor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control system for an elevator system in which a plurality of cars are used in one shaft.

[0002]

2. Description of the Related Art Generally, an elevator has one shaft.
Although two cars are provided, an elevator system in which a plurality of cars are provided on one shaft has also been proposed. In the case of the former general elevator system, a so-called group management control is usually used. Group management control has also been proposed for an elevator system in which a plurality of cars are serviced in one shaft, but in this case, it is necessary to perform control so as to avoid collision of cars in service in the same shaft. Required.

As a group management control device that satisfies such demands, for example, methods described in Japanese Patent Application Laid-Open Nos. 9-272662 and 8-133611 have been proposed.

Japanese Unexamined Patent Publication No. 9-272662 presupposes a so-called low-press elevator system in which each car can move vertically and horizontally, and stops a car without a call or moves it to a traversing path to avoid collision. Is disclosed.

[0005] Japanese Patent Application Laid-Open No. 8-133611 discloses a section in which a certain car is prohibited from entering another car.
A control device for stopping other cars from entering this section is disclosed.

[0006]

The above-mentioned prior art has the following problems. In the group management control device described in the former publication, a car without a call is moved to a traverse,
It is not effective for systems that cannot be evacuated, and simply stops the uncalled car in the shaft if it is not moved to a traverse.

[0007] On the other hand, in the group management control device described in the latter publication, a temporary call is given to a car having no call in front of a no-entry section and stopped. In each case, the description is merely for safety of stopping, and no details are given in the operation part for stopping. SUMMARY OF THE INVENTION It is an object of the present invention to provide an elevator control system that solves the above-described problems and that can perform group management control that is safer against a collision without lowering service to passengers.

[0008]

SUMMARY OF THE INVENTION An elevator control system according to the present invention is an elevator control system for controlling an elevator in which a plurality of cars are put into service in a single shaft. When the vehicle travels to the destination floor and tries to stop, the vehicle decelerates to land according to the deceleration pattern selected according to the position of another car in the same shaft.

Further, the plurality of deceleration patterns include a first deceleration pattern as a normal deceleration pattern and a second deceleration pattern for extending the time from the deceleration start point to the end of landing, and A stop floor difference determining means for determining the floor difference between the stop determination floor and the floor at which the other car is stopped or the stop determination floor, and the stop floor difference determination means determines that the floor difference is within a predetermined floor difference. And a deceleration pattern selecting means for selecting the second deceleration pattern.

Further, the second deceleration pattern may be one in which the vehicle is decelerated to a very low speed just before the stop determination floor, and the vehicle is made to proceed while landing at the very low speed.

Further, the second deceleration pattern may be a pattern in which the vehicle temporarily stops at a position just before the stop determination floor, and then proceeds at a slow speed to land.

[0012]

FIG. 3 is a cross-sectional view of an elevator in which a plurality of cars are used in one shaft according to an embodiment of the present invention. FIG. 4 is a block diagram of a control portion of an elevator in which a plurality of cars are used in one shaft according to the embodiment of the present invention.

In FIG. 3, an elevator in which a plurality of cars are used in one shaft according to an embodiment of the present invention is an electric motor in which cars 1a and 1b ascending and descending in a shaft 2 move up and down the cars 1a and 1b. Weights 4a, 4b for balancing with 5a, 5b and cars 1a, 1b
Are roping each. 3 is a landing floor.

In FIG. 4, an elevator in which a plurality of cars are used in one shaft according to the embodiment of the present invention includes motors 5a, 5a for raising and lowering the cars 1a, 1b.
b. Control devices 7a and 7 that feed back the speed detectors 6a and 6b attached to the controller b to control the movement of the elevator.
b is connected to the group management device 8 that manages the assignment of calls for a plurality of elevators.

FIG. 1 shows a flowchart for explaining an embodiment of the present invention. In FIG. 1, it is determined whether or not the car has been determined to stop at the destination floor in step S1. If a stop decision has been made, a stop decision floor is output to the group management device 8 in step S2. In step S3, stop floor information for stopping or stopping other cars is input from the group management device 8, and in step S4, it is determined whether or not there is a decision to stop other cars. If there is no stop floor information, the process proceeds to step S7, where a normal deceleration pattern PT1 is selected.

If it is determined in step S4 that there is stop floor information of another car, in step S5, the stop determination floor of the own car is compared with the stopped floor or stop determination floor of the other car. If the comparison value is equal to or greater than the predetermined floor difference, the process proceeds to step S7, where a normal deceleration pattern PT1 is selected.

If the comparison value is within the predetermined floor difference, in step S6, a deceleration pattern PT2 for increasing the time from the deceleration start point to the end of landing is selected.

The predetermined floor difference may be set in advance according to each situation of the installed elevator.

The options of the deceleration pattern have been described so far with one normal pattern and one deceleration pattern for extending the time from the deceleration start point to the end of landing. However, the present invention is not limited to this. A plurality of types of deceleration patterns for increasing the time from the deceleration start point to the end of landing may be prepared, including a combination with preparing a plurality of threshold values of the floor difference.

FIG. 2 shows a normal deceleration pattern and a deceleration pattern for increasing the time from the deceleration start point to the end of landing. FIG. 2A shows a normal deceleration pattern PT1, in which the vehicle is landed on the stop determination floor at a constant deceleration.

FIG. 2B shows an example of a deceleration pattern PT2 for increasing the time from the deceleration start point to the end of landing,
At a point earlier than the normal deceleration pattern PT1, the vehicle starts decelerating at a constant deceleration from the steady running, decelerates to a low speed, and then makes a constant running at the low speed before landing. Accordingly, when there is another car on the adjacent floor within a predetermined number of floors from the stop determination floor, the speed is reduced before the normal speed, so that the probability of collision can be reduced. In addition, since the vehicle enters the stop determination floor at a very low speed, it is possible to reduce the impact even if the vehicle cannot be stopped due to some trouble and the vehicle collides.

FIG. 2c shows another example of the deceleration pattern PT2 for increasing the time from the deceleration start point to the end of landing. At a time earlier than the normal deceleration pattern PT1, the vehicle is decelerated at a constant deceleration from the steady running, temporarily stopped before the stop determination floor, and then travels at a low speed again to land on the determined floor. According to this pattern, it is possible to confirm that the vehicle stops once, so that a more secure pattern is obtained.

[0023]

The elevator control device according to the present invention has the following features.
In an elevator control system that controls an elevator in which a plurality of cars enter service in a shaft of a book, when one of a plurality of cars in the same hoistway travels to a target stop determination floor and tries to stop, When it is determined that another car is stopping or stopping on the floor adjacent to the floor within the predetermined number of floors of the stop determination floor, a deceleration pattern that increases the time from the deceleration start point to the end of landing is selected and landing is performed. Since only the extension of time during deceleration is performed, passengers do not feel much lower service. Since the vehicle enters the stop determination floor at a very low speed, it is possible to reduce the probability of collision, and if the vehicle cannot be stopped due to some trouble, the impact can be reduced even in the case of collision.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating an embodiment of the present invention.

FIG. 2 Deceleration pattern diagram

FIG. 3 is a cross-sectional view of an elevator in which a plurality of cars are placed in one shaft according to an embodiment of the present invention.

FIG. 4 is a block diagram of a control portion of an elevator having a plurality of cars in one shaft according to an embodiment of the present invention.

[Explanation of symbols]

1a, 1b basket, 2 shafts, 3 landing floor,
4a, 4b weight, 5a, 5b motor, 6
a, 6b speed detector, 7a, 7b control device, 8
Group management device, PT1 first deceleration pattern, PT2 second deceleration pattern

Claims (4)

[Claims] An elevator control system for controlling an elevator in which a plurality of cars are put into service in a single shaft has a plurality of deceleration patterns, and one of the plurality of cars travels to a destination floor and tries to stop. An elevator control system characterized in that, at the time, the vehicle is decelerated and landed according to a deceleration pattern selected according to the position of another car in the same shaft. 2. The plurality of deceleration patterns include a first deceleration pattern as a normal deceleration pattern, and a second deceleration pattern for increasing the time from the deceleration start point to the end of landing, and A stop floor difference determining means for determining the floor difference between the stop determination floor and the floor at which the other car is stopped or the stop determination floor, and the stop floor difference determination means determines that the floor difference is within a predetermined floor difference. 2. The elevator control system according to claim 1, further comprising: a deceleration pattern selection unit that selects the second deceleration pattern. 3. The elevator control system according to claim 2, wherein the second deceleration pattern is to decelerate to a very low speed just before the stop determination floor, and proceed while landing at the very low speed to land. 4. The elevator control device according to claim 2, wherein the second deceleration pattern is to stop once before a stop determination floor, and then proceed at a slow speed to land.