JPS6353112B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to door control using special switches used only by maintenance personnel and managers.

[Conventional technology]

On the elevator operating board (hereinafter abbreviated as OPB),
Only elevator maintenance personnel and managers are provided with switches that are used for elevator operation. These include the car ventilation door, car lighting, stop, maintenance switching, door opening/closing, etc., and are not necessary for general passengers to operate directly.

For this reason, as shown in Figure 1, in a typical OPB, these switches are usually stored in a compartment with a special cover on the OPB, and are always locked using a special key. Figure 2 shows this compartment with the cover removed.

These switches are of the two-position type and can be pressed in the direction desired by the operator to perform the function corresponding to that position, and can be operated by anyone as long as the door is open.

[Problem that the invention seeks to solve]

By the way, when moving relatively large items such as moving an apartment, there are times when it is necessary to keep the elevator door open for a considerable period of time. In this case, the manager will give the person in charge of the move a key to open the switch box, and when moving, the manager will operate the internal door lock switch to temporarily open and close the door, making it easier to transport the belongings. Sometimes I'm allowed to do something.

As shown in Figure 3, this door stop directly cuts the door opening/closing circuit, so if you push it when the door is open, it will stay open, and if you push it when it is closed, it will stay closed. .

For this reason, simply by returning the door stop switch shown in Figure 2, the vehicle is operating normally with the box (a) cover open, and children are not allowed to operate in this state (when interrupting work for a short period of time, such as during lunch). If a child gets into an elevator and accidentally presses the door stop switch while the door is closed, the child will remain trapped in the car, and if the child is an infant, it will take a lot of effort to rescue the child. . (However, there is a risk that similar troubles may occur if a special switch other than the door stop is pressed.) In view of the problems of the prior art, an object of the present invention is to provide an elevator control circuit that is safe even if a special switch is operated incorrectly. There is a particular thing.

[Means for solving problems]

The present invention is characterized in that a switch is provided that can temporarily stop the opening and closing of the elevator door, and even if this switch is operated, the door will automatically open when the elevator is at the landing level. It is something.

〔Example〕

FIG. 4 shows one embodiment of the invention. The door circuit in Figure 3 indicates that the elevator is in its normal landing position (meaning it is in the open zone) for safety reasons.
When the door is open, the door opens. However, since the door lock switch cuts the door circuit itself, the door lock switch remains pressed.
The door will not open even if it stops at the correct landing position. Therefore, as shown in FIG.
Release delay type relay 10T held for ~5 seconds
After the elevator stops at its normal position, the door stop switch is short-circuited for the time required for the door to open. As a result, even if a child accidentally presses the door lock switch while driving, the door can be opened once the child has stopped at level.

Also, the elevator has stopped at the level,
When the door stop is pressed in this state, the contact of the relay DST, which detects when the door stop is pressed, short-circuits the door stop switch for only the time that the door can be opened. , prohibiting the opening and closing of the door. In addition, relay DST,
Contacts, not shown, provide a command to the door circuit to open the door.

Further, a contact point MS indicates a contact point of a relay of a switch operated by a maintenance worker during maintenance of the elevator. When maintenance personnel operate the door stop, they want to stop the door in that state, as in the past, so the normally closed contact of this MS cuts the short circuit of the door stop switch.

〔Effect of the invention〕

According to the present invention, even if the special switch is erroneously operated, the door will open, so there is no danger of being trapped inside the car.

[Brief explanation of the drawing]

FIG. 1 is a front view of a conventional OPB, FIG. 2 is a diagram showing the contents of a switchbox, FIG. 3 is a conventional door stop circuit diagram, and FIG. 4 is a circuit diagram of an embodiment of the present invention. 10...Relay.

Claims (1)

[Claims] 1 Equipped with a door circuit that opens and closes the elevator door and a switch that can temporarily stop the opening and closing of the elevator door, even if this switch is operated,
An elevator control circuit characterized in that when the elevator is at the landing level, the door automatically opens and then temporarily stops opening and closing the door.