JPS6320694Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a device for controlling the opening and closing of elevator doors.

In recent years, various safety devices, control devices, etc. of elevators have been made contactless, and their reliability has improved dramatically. However, in the unlikely event that a failure occurs in these devices, if the elevator car is running, the elevator car will be brought to a sudden stop to ensure safety. After the car is brought to a sudden stop, various safety checks are automatically performed, and once the minimum safety detection required for low-speed operation is completed, low-speed automatic operation is performed in which the car is driven to the nearest floor at low speed. It's becoming like that. When the car lands in the section where the door can be opened on the nearest floor in low-speed automatic operation and the door opens, a certain period of time is counted, during which time it is detected whether or not the car can be restarted. This is for the purpose of safely confirming whether or not the failure location poses a problem for future operation, and detecting whether or not there is an abnormality in other devices related to this.

However, if the door close button is pressed inside the car while counting the above-mentioned predetermined time, the door starts to close. Further, after a predetermined period of time (for example, 4 seconds) has elapsed after the car landed on the floor and the door opened, the door similarly begins to close. However, as described above, since it takes a certain amount of time to detect whether or not the restart is possible, the restart does not necessarily start immediately even if the door is closed. After detecting whether or not a restart is possible, there is no problem if the restart is possible, but if the restart is not possible, the door will be closed even though the service is unavailable, which will create a significant sense of distrust among passengers. .

This invention improves the above-mentioned problem by preventing the door from closing even if the door closing condition is met during the restart possibility detection time, thereby eliminating the sense of distrust among passengers caused by closing the door when restart is possible. An object of the present invention is to provide an elevator door control device that enables the following.

An embodiment of this invention will be described below with reference to figures.

In the figure, (+) and (-) are DC power supplies, 1 is a safety confirmation relay contact that opens if everything in the safety confirmation circuit (not shown) is normal, and closes if there is any abnormality, and 2a and 2b are safety confirmation relay contacts. a normally closed contact of a door-openable section detection relay (not shown), which is energized when the car is in the door-openable section and deenergized when the car is outside the door-openable section; 2;
C is also a normally open contact, and 3 operates immediately when energized and issues a command to automatically operate the car at low speed, and when de-energized, it returns after a certain period of time (for example, 1 to 2 seconds) and cancels the above command. 3a and 3b are normally open contacts, 4 is a door open completion detection contact that closes when the door is completely opened, and 5 is a time relay for low-speed automatic operation commands that is activated once voltage is applied between terminals A and C. Detects whether it is possible to restart within a certain period of time (4 to 10 seconds),
A safety confirmation detection circuit that opens terminals A and C and connects terminals B and D when restartability is detected;
Reference numeral 6 indicates a restart disabling command relay that issues a command to prevent the car from restarting when energized; 7 operates immediately when energized, and operates for a certain period of time (for example, 12
7a is a normally open contact, 7b is a normally closed contact, and 8a and 8b are energized to release the brake when the car is running, and deenergized when the car is stopped. 9 is a normally open contact of a brake release command relay (not shown) that applies the brake when activated; 9 is a door control relay that issues a door close command when energized; and a door control relay that issues a door open command when deenergized; 10 is a door control relay that causes the door to open; 11 is a door opening time setting relay, 11a and 11b are normally open contacts, and 12 operates immediately when energized and opens when deenergized. A time relay for setting door open time that returns after a certain period of time (for example, 4 seconds), 12a is its normally closed contact, 13 is a door close button provided inside the car, and 14 is a landing door and when the car door is closed and the landing door is closed. A door closed detection relay contact that opens when the door is locked and closes otherwise; 15 is a door closing promotion relay; 15a is its normally closed contact; 15
Similarly, b is a normally open contact.

Next, the operation of this embodiment will be explained.

If an abnormality occurs in the safety device while the car is running in response to a car call from a destination button inside the car, the safety confirmation relay will operate and the car will suddenly stop. Also, contact 1 is closed. At this time, if the car is stopped between floors, the relay contact 2a for detecting the section where the door can be opened is closed, so (+)
-1-2a-3-(-) circuit energizes the low-speed automatic operation command time relay 3, and self-holds by closing the contact 3a. Now, the well-known low-speed automatic operation circuit will ensure minimum safety, and then the car will travel at low speed to the nearest floor. At this time, since the brake release command relay contact 8a is closed, the door control relay 9 is energized and the door is kept in the closed state. Also, since contact 8b is also closed,
The door opening time setting relay 11 is energized, and the contact 11
a is closed. Also, since contact 11b is also closed, (+)-11b-15a-12-(-)
In this circuit, the door closing time setting time relay 12 is energized and the contact 12a is open.

When the car enters the section where the door of the nearest floor can be opened, the contacts 2a and 2b are opened and the contact 2c is closed. At the same time, a stop command is issued and the car stops. At this time, contacts 12a, 2b, and 8a are all opened and door control relay 9 is deenergized, so the door opens.

On the other hand, contacts 2c and 3b are also closed, and when the door opening completion detection contact 4 is closed, 2c-
Since a voltage is applied between terminals A and C of the safety confirmation detection circuit 5 through the circuit 3b-4, it is detected whether or not the restart is possible within 4 to 10 seconds (details are omitted). Further, in the circuit (+)-2c-3b-4-7-(-), the safety confirmation detection time setting time relay 7 is energized, the contact 7a is closed, and the contact 7b is opened. The door open time setting relay 11 is held by closing the contact 7a. Therefore, timed relay 12
is also held, and contact 12a continues to open. on the other hand,
When the contact 2a is opened, the low-speed automatic operation command time relay 3 is deenergized and returns after 1 to 2 seconds, and the contact 3b is opened, but the above restart operation continues. Further, when the contact 3b is opened, the time relay 7 is deenergized, but the contact 7a is closed for 12 seconds. That is, during the operation to detect whether restart is possible, contact 12a is open (contact 2b,
8a is also open), the door control relay 9 is not energized, and even if the door closing condition is satisfied, the door closing operation does not occur.

As a result of the above-mentioned restartability detection operation, if it is detected that restarting is not possible, the terminal A- of the safety confirmation detection circuit 5
C is open, and terminals B and D are connected. Therefore, the restart impossible command relay 6 is energized, and restarting of the car is prevented. When it is detected that restart is possible, when time relay contact 7a opens, both contacts 8b and 10 are open, so door opening time setting relay 11 is deenergized and contacts 11a and 11b are opened. By opening the contact 11b, the time relay 12 is deenergized, and the contact 12a is closed after 4 seconds. The door control relay 9 is now energized, a door closing command is issued, and the door begins to close.

Also, when the door close button 13 is pressed while the contact 7b is closed, (+)-13-7b-14-
The door closing promotion relay 15 is energized by the circuit 15-(-) and self-maintains by closing the contact 15b.
Also, since the contact 15a is open, the time relay 1
2 is deenergized and the door can be closed even if the 4 second set time has not expired. When the door closes, the door close detection relay contact 14 opens, so the door close promotion relay 15 is deenergized, the contact 15a closes, and the contact 15b opens. However, when the contact point 7b is open, even if the door close button 13 is pressed, the door close promotion relay 15 is not energized and the door does not close. That is, during the restart possibility detection operation, even if the door closing condition is satisfied, the door closing operation does not proceed.

As explained above, in this invention, a car that has stopped between floors due to a breakdown is run at low speed to the nearest floor, and there it is detected whether or not it can be restarted within a predetermined time. Even if the door closing condition is satisfied during this time, the door closing operation is prevented, so it is possible to eliminate the sense of distrust on the part of passengers due to the door being closed without being able to be restarted.
Further, since the door can be closed after the long set time, the time difference from the predetermined time can be used to guide passengers to get on and off the car when restart is possible or not.

[Brief explanation of the drawing]

The figure is a circuit diagram showing an embodiment of an elevator door control device according to this invention. 1... Safety confirmation relay contact, 2a to 2c... Door opening possible section detection relay contact, 3... Time limit relay for low-speed automatic driving command, 5... Safety confirmation detection circuit, 6
...Restart impossible command relay, 7...Timed relay for setting safety confirmation detection time, 9...Door control relay, 1
1... Door open time setting relay, 12... Door open time setting time limit relay, 13... Door close button, 15
... Door closing promotion relay.

Claims (1)

[Scope of utility model registration request] 1. An elevator door control device which, when a car stops between floors due to a malfunction while traveling, operates the car automatically at low speed to travel to the nearest floor and opens the doors, and when the car reaches the nearest floor, cancels the low speed automatic operation, characterized in comprising: a safety confirmation detection circuit which automatically determines whether the car can be restarted within a predetermined time when the car reaches the nearest floor; a safety confirmation time setting timer circuit which sets a time longer than the predetermined time when the low speed automatic operation is canceled; and a door closing prevention circuit which prevents the door closing operation while this timer circuit is operating and enables the door closing operation regardless of the determination result of the safety confirmation detection circuit when the timer circuit is inoperative.