JP3365268B2 - Elevator monitoring device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator monitoring system for monitoring a plurality of elevators, and to a backup method in the event of a system abnormality or failure. 2. Description of the Related Art In a building having a plurality of elevators, all elevators are usually driven by a commercial power supply from outside the building. When the commercial power supply is interrupted, equipment for driving an elevator using a self-generated power supply equipment is provided. However, since the self-generated power supply can supply only a limited amount of power, it is not possible to drive all elevators at one time. Usually, only one elevator can be driven for a plurality of elevator groups. It has become. For this reason, in the conventional elevator control device, when switching from the external commercial power supply to the self-powered power supply, the self-powered control system in which the elevators are sequentially operated one by one to the evacuation floor to rescue the passengers trapped in the elevator. Driving function is provided. [0003] An example of such a conventional elevator control device is disclosed in Japanese Patent Application Laid-Open No. 63-288883. FIG. 3 shows a signal system of the conventional self-running control operation automatic control system of the elevator control device, in which three elevators 1 to 3 perform a self-running control operation of one group, and the order of return is 1-. Units 2-3 are in order. As shown in FIG. 3, a commercial power supply detection signal 5 and a private power supply detection signal 6 are input to a monitoring device 4 that controls self-powered control of a plurality of elevators 1 to 3 in a private power system as a group. Is given as a signal. The monitoring device 4 sends return command signals 7 to 9 to the elevator control devices 2 of the respective units.
And a return completion signal 1 indicating completion of return to the evacuation floor from each elevator control device 2 to the monitoring device 4.
0 to 12 are provided. [0004] Fig. 4 is a time chart showing such an autonomous control automatic operation state. When the commercial power detection signal 5 is turned off from on and the self power detection signal 6 is turned on, the monitoring device 4 outputs The return command signal 7 is output to the elevator of the first unit, and the first unit moves to the evacuation floor. Then, when returning to the evacuation floor, the control device 2 of the first elevator outputs a return completion command signal 10 to the monitoring device 4, and upon receiving this signal 10, the monitoring device 4 turns off the return command signal 7 to the first elevator. Then, the return command signal 8 is output to the next elevator No.2. After completion of the return of the second elevator, elevator 3
The elevator is returned to the evacuation floor, and the passengers in the elevators 1 to 3 are rescued. [0005] Normal operation is performed in this manner. However, according to this method, when a certain elevator has a failure, a return completion command signal is not output, so that return to the next car cannot be performed. For this reason, conventionally, a backup timer relay set to the maximum required travel time required to arrive at the evacuation floor after receiving the return instruction is provided, and if the return completion signal is not output from each elevator, this backup timer relay is provided. The timer relay terminates the return instruction of that unit and issues a return instruction to the next unit to deal with a failure.
For example, as shown in FIG. 5, when this elevator cannot operate during the self-start operation of the first elevator, the return completion signal for the first elevator is not output from the monitoring device 4 even if the return command 7 is received. Although the elevator after the unit cannot return, the backup timer relay which is set to the maximum travel time required to arrive at the evacuation floor after receiving the return instruction is provided. Terminated the return command 7, output the return command 8 to the second elevator, and sequentially returned. [0006] However, in such a conventional elevator control device, even if the restriction is made by the timer, unless the completion signal is received from the car which received the return command, the next car return. Since there is no command, if the transmission is interrupted due to the failure of the monitoring device itself or the failure of one of the relays or the timer, there is a disadvantage that it cannot return to the next unit. [0007] In the elevator monitoring apparatus according to the present invention, the monitoring apparatus performs the return control with the leadership in a normal state, but when the monitoring apparatus and the elevator control apparatus fail, the monitoring apparatus performs a return control. The authority to return to each elevator control device is delegated, and the elevators before and after are separated so that the elevator can return independently. An embodiment of the present invention will be described below. FIG. 1 shows a control system diagram of the elevator monitoring device and the respective elevator control devices according to the present embodiment at the time of autonomous control. FIG. 2 shows a time chart of the self-control operation in the present embodiment. In FIG. 1, a method of returning the self-control when each control device 2 and the monitoring device 4 are normal is returned to each control device under the command of the monitoring device 4 as shown in FIG. The order is passed and the order is returned. However, the power supply status changes from power failure to self-powered operation, so that all the devices may not operate normally. In addition, a power failure due to a fire may cause the power supply to self-start, and some devices may be abnormal. An embodiment of the present invention of the self-control operation in such a state will be described with reference to FIG. Signal 16 indicating that the control system is abnormal is ON
Power outage (signal 5 is OFF), autonomous state (signal 6 is O
At N), the control device of each elevator starts timer counting (signals 13 to 15) all at once. The timer previously sets the time for each car in the order of return, and the time is set to the total of the maximum required time for the previous car to move to the evacuation floor in response to the return command. In FIG. 2, since self-control has been performed in the abnormal state, the timers of the respective control devices simultaneously start counting. The return order is the order of the first, second, and third units. First, since the first car is the first car, the backup timer 13 finishes counting after the self-generated power is established, and issues a return command 7 to the first car. As a result, Unit 1 starts returning and returns to the evacuation floor, and issues a completion signal 10. Here, the completion signal 10 is only output and has no meaning in control. Next, the backup timer 14 of the second unit, which is set to be equal to or longer than the maximum required time to complete the return of the first unit, finishes counting and issues a return instruction 8 to the own unit. As a result, the second unit starts returning. However, in this embodiment, an example is shown in which the second unit cannot perform the control operation due to a failure, and the completion signal 11 is not output because the second unit cannot return. Next, the backup timer 15 of the third unit, which has been set to a time equal to or longer than the maximum required time to complete the return of the first and second units, finishes counting and issues a return instruction 9 to the own unit. As a result, Unit 3 starts returning, returns to the evacuation floor, and issues a completion signal 12. As described above, according to the present invention, the control command operation in the control system abnormal state is delegated to each elevator control device, and can be cut off independently of the state of the elevator before and after the return order to operate independently in the own car. ,
All normal elevators can be returned. In FIG. 1, each return command and completion signal are connected to a monitoring device and each control device, and are transmitted one-to-one. However, the present invention is also applicable to a device that exchanges signals by multiplex transmission between control devices. it can. Further, the backup timer can be realized by either a hard timer or a soft timer. As described above, according to the present invention, the operation of the autonomous control operation when the elevator or the monitoring device fails is described.
The control command can be reliably given to the elevator that can be operated, and the elevator passengers can be rescued and evacuated regardless of the failure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a control system diagram according to the present invention. FIG. 2 is a time chart illustrating a self-control operation in the present invention. FIG. 3 is a control system diagram in a conventional example. FIG. 4 is a time chart 1 illustrating a self-control operation in a conventional example. FIG. 5 is a time chart 2 illustrating a self-control operation in a conventional example. [Description of Signs] 1 ... elevator, 2 ... elevator control device, 3 ... signal transmission unit in elevator control device and monitoring device, 4
... monitoring device, 5 ... commercial power supply detection signal, 6 ... private power supply detection signal, 7-9 ... return instruction, 10-12 ... return completion signal, 13-15 ... backup timer, 16 ... failure signal.

────────────────────────────────────────────────── (5) References JP-A-53-87448 (JP, A) JP-A-57-27880 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B66B 5/00-5/28

Claims (1)

(57) [Claims] [Claim 1] An elevator group consisting of a plurality of elevators is supplied with power from an emergency private power generator in the event of a power outage for elevator operation. A first return command means for sequentially giving a return command to each elevator in accordance with a predetermined order, and a part or monitoring of a device in the group. Second return command means in the event of a device failure , and power failure for the elevator operation.
However, some of the devices in the group or the monitoring device
Fault detecting means for constantly monitoring , and
If the failure is not determined by the failure detection means,
Activating the first return command means, and when the power is
If the failure detection means determines that a failure has occurred, the second
An elevator monitoring device characterized by operating return instruction means .