JPS633822B2 - - Google Patents

Description

[Detailed description of the invention]

This invention relates to an improvement in a device for controlling the opening/closing and operation of elevator doors. In an elevator, when a car enters a section of a floor where the door can be opened, the car door and the landing door (hereinafter simply referred to as the door) are opened electrically. This will be explained with reference to FIGS. 1 and 2. In the figure, 1 is a hoisting motor, 2 is a driving sheave of the hoisting machine driven by the electric motor 1, 3 is a deflection sheave, 4 is a main rope wound around the net sheave 2 and the deflection sheave 3,
5 and 6 are a car and a counterweight connected to both ends of the main rope 4, respectively, 7 is a floor, and 8 is a shield placed in the hoistway and set to a length corresponding to the section where the door of floor 7 can be opened. A plate 9 is a door-openable area detector that is provided on the car 5 and faces the shielding plate 8 when the car 5 enters the door-openable area on the floor 7. 9A is an oscillator of an electromagnetic coupling method, and 9B is an oscillator 9A. 9C is a rectifier circuit that rectifies the output; 9C is a relay drive circuit in which the output 9a becomes "L" if there is an input; and the output 9a becomes "H" if there is no input; 10 is a control circuit; 11 is provided in the control circuit 10; The door opening possible section detection relay 17a is a door opening command signal issued from the control circuit 10. That is, the oscillator 9A of the door-openable section detector 9
constantly oscillates magnetic flux, and the rectifier circuit 9B rectifies and outputs this. Therefore, the output 9a of the relay drive circuit 9C becomes "L", and the door-openable section detection relay 11 is deenergized. When the car 5 arrives at the section of the floor 7 where the door can be opened, the detector 9 faces the shield plate 8, so the oscillation of the oscillator 9A is stopped and the output of the rectifier circuit 9B disappears. Now, the output 9a of the drive circuit 9C becomes "H", and the door-openable section detection relay 11 is energized. As a result, the door opening command signal 17a becomes "H", the door driving device (not shown) operates, and the door opens. That is, after the detector 9 detects that the car 5 has arrived at the area where the door can be opened, the door opening command signal 17a is sent.
to ensure the safety of passengers. However, if the detector 9 fails and the output 9a is held at "H", the door may open even if the car 5 stops between floors, which is extremely dangerous. It is. This invention is intended to improve the above-mentioned problems, and in the event of a detector failure, it prevents the generation of a door-opening command signal, and also detects whether the failure diagnosis has been completed and determines whether or not the car can be restarted. To provide an elevator control device that ensures safety and prevents passengers from being unnecessarily trapped in a car. An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In Fig. 3, (+) and (-) are DC power supplies, 11a is a normally open contact of the door-openable section detection relay 11, and 11b
12 is a normally closed contact, 12 is a start command relay contact that opens when the closed car 5 lands on the floor, and 13 is a running relay that causes car 5 to run when energized and stops when deenergized. So, 13a, 13b
is its normally open contact, 13c to 13e are normally closed contacts, 14 is a fault diagnosis command relay, and 14a, 14
b is its normally open contact, 15 is the fault detection relay, and 1
5a to 15e are normally open contacts, 16 is a failure diagnosis completion relay, 16a to 16c are normally open contacts, 1
6d is a normally closed contact, 17 is a door open command relay that issues a door open command signal 17a when energized, 18 is an initial setting relay, and 18a is its normally open contact;
b and 18c are normally closed contacts, and 19 is a position detection relay contact that closes when the car 5 reaches a point a certain distance before the floor 7 where it is scheduled to stop. Other than the above, the configuration is the same as in FIGS. 1 and 2. Next, the operation of this embodiment will be explained. A When the power is turned on (initial setting) When the power (+) and (-) are turned on, (+) -1
The failure detection relay 15 is energized by the circuit 8b-15-(-) and self-maintains by closing the contacts 15b and 15c. In addition, the contacts 15a, 15
d, 15e are also closed. (+)-18c-16-
With the (-) circuit, the failure diagnosis completion relay 16 is energized and self-maintained by closing the contact 16a. Further, the contacts 16b and 16c are closed, and the contact 16d is opened. The initial setting relay 18 is energized by the closing of the contacts 15e and 16c, and is self-maintained by the closing of the contact 18a. Further, the contacts 18b and 18c are opened. This completes the initial settings. B For normal driving When start command relay contact 12 closes, (+)
-12-15a-13-(-) circuit energizes traveling relay 13, and car 5 starts traveling. Further, due to the energization of the traveling relay 13, the contacts 13a and 13b are closed, and the contacts 13c to 13e are closed.
is open. Failure detection relay 15 is deenergized by opening contact 13c. In addition, contact point 13d
By opening, the failure diagnosis completion relay 16 is also deenergized. When the car 5 continues to run and reaches a point a certain distance before the scheduled stop floor 7, the position detection relay contact 19 closes and (+)-19-13b-14
- (-) circuit, the failure diagnosis command relay 14 is energized and the contacts 14a, 14b are closed. Note that the detector 9 is set not to face the shielding plate 8 at the moment the contact 19 closes. Therefore, the output 9a of the relay drive circuit 9C is "L", the door-openable section detection relay 11 is deenergized, and the contact 11b is closed, so that (+)-14a- 11b-15
- (-) circuit, the failure detection relay 15 is energized and self-maintains by closing the contact 15c.
Furthermore, in the (+)-14b-16-(-) circuit,
The failure diagnosis completion relay 16 is energized. When the car 5 approaches the scheduled stop floor 7 and the detector 9 faces the shielding plate 8, the door-openable section detection relay 11 is energized as described above, and the contact 11a is activated.
is closed, and contact 11b is opened. When the car 5 lands on the scheduled stop floor 7, the start command relay contact 12 is opened, the traveling relay 13 is deenergized, the contact 13b is opened, and the failure diagnosis command relay 14 is deenergized. Also, since the contact 13c is closed, (+)-13c-15b-15c-15-
With the (-) circuit, the failure detection relay 15 is self-maintained. In addition, since the contact 13d is also closed,
(+)-13d-16a-16-(-) circuit,
The failure diagnosis completion relay 16 also holds its own. As described above, the contacts 11a, 15d, 16b, 13e
Since all are closed, the door open command relay 17 is energized, the door open command signal 17a becomes "H", and the door opens. C When the door-openable section detector 9 fails If the detector 9 fails and the output 9a continues to be held at "H", the door-openable section detection relay 11 continues to be energized and the contact 11b continues to open. . Therefore, the position detection relay contact 19 is closed,
The failure diagnosis command relay 14 is energized, and the contact 14
Even if a is closed, the failure detection relay 15 is not energized.

[Table] As explained above, in this invention, a fault diagnosis is performed on the door-openable section detector while the car is running, and if it is normal, a door-opening command is issued, and when the car stops, the fault diagnosis is completed. In addition, if a failure is detected, the restart of the car is prevented, and if the failure diagnosis is not completed, the restart of the car is enabled. As a result, even if the car stops between floors due to a failure of the door-openable section detector, the door will not open, ensuring the safety of passengers. Further, if the failure diagnosis is not completed, the car can be restarted, and reliability can be improved without unnecessarily trapping passengers in the car.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a conventional elevator control device, Fig. 2 is a block circuit diagram of the door-openable section detector shown in Fig. 1, and Fig. 3 is an embodiment of the elevator control device according to the present invention. FIG. 1... Hoisting motor, 5... Car, 7... Floor,
8... Shielding plate, 9... Door-openable section detector, 1
0...Control circuit, 11...Door opening possible section detection relay, 12...Start command relay contact, 13...Travel relay, 14...Failure diagnosis command relay, 15...
Failure detection relay, 16... Failure diagnosis completion relay,
17...Door opening command relay, 19...Position detection relay contact, and the same parts in the drawings are indicated by the same reference numerals.

Claims (1)

[Claims] 1. A door-openable section detector that operates when the car is in a door-openable section of the floor, and a failure detection device that checks the operation of the door-openable section detector while the car is running and operates if it is normal. a door-opening command circuit that issues a door-opening command when the door-openable section detector and the failure detection circuit operate together; a failure diagnosis completion circuit that operates when the failure detection circuit performs an inspection; When the car stops, if the failure diagnosis completion circuit operates and the failure detection circuit does not operate, the car is prevented from restarting, and if the failure diagnosis completion circuit does not operate, the car is restarted. An elevator control device equipped with a running circuit that enables this.