KR0130361B1 - Elevator door control equipment & method - Google Patents

Abstract

The presented method detects malfunctioning of a photoelectric device in elevator doors, and cancels no-close signal when the photoelectric device is malfunctioning so as to prevent the interruption of the operation of an elevator. The photoelectric device generates(16S) operation signal as it starts detecting an object between the doors. A timer counts(17S) the operation time of the photoelectric device starting from a call signal input. If the time counted is below expected time, the doors remain opened(18S) taken the photoelectric device is normal. Otherwise, a controller sets(19S) and outputs(20S) a malfunctioning signal, and cancels forced open signal. After the malfunctioning signal is output, the functionality of the shoe is judged. If the shoe is working normally, the elevator finishes the closing operation and moves(14). However, the controller outputs forced open signal if the shoe is malfunctioning.

Description

Elevator Door Control Device and Method

1 is a conceptual diagram of a general elevator door safety device operation.

2 is a flow chart of a conventional elevator door operation.

3 is a circuit diagram of an elevator door controller according to the present invention.

4 is a flowchart illustrating the operation of an elevator door controller according to the present invention.

* Explanation of symbols for main parts of the drawings

1: door closing command 2: door opening command,

3: photoelectric device failure detection unit 4: door closing stop command unit,

5: display unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator door control device and method, and more particularly, in a door control device in which a safety device using a mechanical shoe and a photoelectric device is combined, a photoelectric device malfunctions due to a change in the characteristics of the photoelectric device or careless use of an elevator. Therefore, the present invention relates to an elevator door control device and a method suitable for preventing a defect such as an inability to operate an elevator.

Generally, the most widely used safety device for elevator doors is a mechanical shoe.

Here, the mechanical shoe is a safety device that reopens the door by operating the switch by using the displacement of the shoe generated when the object and the shoe, when there is a passenger or object between the door when closing the door.

Such a mechanical shoe device is mandated by a lifting elevator due to a legal obligation to install it.

This safety device has the advantage that the reliability of the safety device is very high because of its simple operation principle, but it has a problem of causing anxiety or discomfort when the passenger rides by detecting collision with the door.

In order to compensate for this problem, a photoelectric device is installed between the doors in parallel with the mechanical shoe device to detect an object by light rays, a human body detection method using ultrasonic waves, and a human body is applied to the door in a state where high frequency is applied to the door. Indirect detection methods, such as the use of a change in capacitance between the door and the ground at the time of approach, have been put into practical use, and safety devices using optical devices have been widely applied due to economic problems.

A safety device is to protect human life or property by detecting an inappropriate situation and taking appropriate action (usually proper operation such as stopping operation or alarming) .However, if the safety device itself malfunctions, You have to bear a lot of inconvenience.

Referring to the accompanying drawings, such a general elevator door safety device is as follows.

Figure 1 is a general view of the elevator door safety device operation, Figure 2 shows a conventional elevator door operation flowchart.

FIG. 1 is designed to stop the closing operation when there is a passenger or foreign object between the doors and operate it to open once in the process of closing the door after the door is opened, and to operate the elevator only when the door is completely closed by repeating this operation. .

That is, the mechanical shoe is a signal that opens the door again by operating the micro switch SW when the door is closed with the passenger MAN while the door is closed in the direction of the arrow and the shoe moves in the direction opposite to the door travel direction. To generate.

The optoelectronic device is composed of a light-transmitting unit (PHT) for generating light and a light-receiving unit (PHR) for receiving light, and is fixed to the door (DOOR) by a separate support (BRKT).

The light BEAM emitted from the light-transmitting part PHT passes through the SHOE HOLE of a shoe made of transparent acrylic or the like to reach the light receiving part PHR.

When the light is interrupted by the passenger MAN, the output of the light receiver PHR is changed from the OFF state to the ON state, and generates a signal for re-opening the door using this signal.

The conventional operation of such an elevator safety device is as follows.

That is, when the elevator call signal is generated as shown in FIG. 2 (IS), the elevator immediately closes the door and moves to the floor where the call is generated, thereby generating a door closing command for closing the door and closing the door (2S). At this time, if the photoelectric device or the mechanical shoe is operated and there is a passenger or other material between the doors (3S), the door is opened again (4S).

If there is no passenger or other material between the doors in step 3S, the door is closed (5S) and the elevator starts to the calling registration floor (6S).

However, such a conventional elevator door control device has the following problems.

That is, due to inadvertent use of the elevator, deformation of the shoe due to collision with the shoe during getting on and off, contamination of the life of the shoe treated with transparent acrylic material to pass light, change of the characteristics of the photoelectric device and distortion of the door, etc. Due to the same causes, the light generated by the light emitting unit does not reach the light receiving unit, and even though there are no passengers or other materials between the doors, the doors are not closed and thus the elevator operation is stopped.

The present invention has been made to solve the above problems, and an object thereof is to prevent the operation of the elevator due to malfunction of the photoelectric device.

Features of the elevator door control device of the present invention for achieving the above object is a failure detection unit which is installed inside the elevator door to detect a failure of the photoelectric device and output a failure signal; A door closing command unit for instructing the door to be closed when there is no operation signal of the elevator shoe and a door closing blocking signal and a call signal of the elevator, and releasing the door closing blocking signal when there is a failure signal of the photoelectric device; A door opening command unit generating an opening command of the elevator door; A door closing stop command unit for outputting only a door closing stop signal when the elevator door closing signal and the failure signal of the photoelectric device are not generated; The display device may be configured to include a display unit displaying a failure of the photoelectric device when a signal according to the photoelectric device failure is detected by the failure detection unit.

In addition, a first step of commanding the closing of the door and determining the abnormal operation of the photoelectric device and the shoe when the elevator call signal is a feature of the elevator door control method of the present invention; A second step of performing an elevator door forced opening step if the operation of the photoelectric device and the shoe is abnormal in the first step, and closing the elevator door and moving the elevator to a calling floor if it is normal; When the operation time of the photoelectric device is counted in the first step and the predetermined time elapses, it is determined that the photoelectric device is broken and the forced opening command of the elevator door is released, and the elevator door is forcibly opened according to the abnormality of the elevator shoe operation. And a third step of repeating the closing step.

Hereinafter, exemplary embodiments of an elevator door control apparatus and method according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram of the elevator door control circuit according to the present invention, Figure 4 is a flow chart according to the control operation of the elevator door of FIG.

First, in FIG. 3, a separate relay core control circuit is omitted and only the contacts are displayed. ) Is a contact, normally closed contact ( ) Is described as contact b.

Lift call signal (CALL) a contact, timer (TIME) contact, shoe operation signal (XSHOE) b contact, door closed stop signal (NOCLOSE) b contact is connected in series to lift signal of elevator and shoe operation signal And a door close command unit 1 for instructing the door door to be closed when there is no door close stop signal and releasing the door close stop signal when a photoelectric device malfunctions, and a door close command b. If the contact and open logic are connected in series and there is no problem in opening the door (OPEN LOGIC), the door open command part (2) which generates the door open command, and the photoelectric device operation signal (XPHB) a contact, the door close completion signal (DOORSW) The photoelectric device fault detection unit (3), which detects a fault of the photoelectric device by contacting the contact point b and the lifter call signal CALL, the contact point a in series, and the contact point a. Operation signal (XPHB) a contact, door close button signal (XCL) b contact , Photoelectric device fault signal (PHERROR) b contact is connected in series, there is no door close signal and there is no fault signal of the photoelectric device, the door closing stop command (4) for commanding the door closing stop signal, and the light device fault signal (PHERROR) a) contact point, door closing completion signal (DOORSW) b contact point, PLICKER, etc. are connected in series, and the display part 5 which displays the failure of the photoelectric device in the case of a photoelectric device failure is comprised.

Here, the door closing command unit 1 is connected to the contact of the door close button signal (XCL) a and the door close invalid signal (XCLCUT) b in series, these contacts are the call signal (CALL) of the elevator, the timer (TIME) ) a contact, shoe operation signal (XSHOE) b is connected in parallel to prevent the door to be closed manually, and the door close invalid signal (XCLCUT) b contact and photoelectric device fault signal (PHERROR) a contact in parallel If the photoelectric device fails, the door close invalid signal is automatically released.

Referring to the operation and effect of the elevator door control device of the present invention configured as described above are as follows.

That is, as shown in Fig. 4, the elevator call signal CALL is generated (11S), and after a predetermined time elapses, the door closing command CLOSE is generated (12S).

However, when the operation signal XSHOE or the door closing stop signal NOCLOSE of the shoe, which is the door safety device, is generated, the door closing command OPEN is generated and the door is opened.

Subsequently, it is determined whether or not the photoelectric device has a failure signal (13S). If the photoelectric device is broken, the door is closed and the elevator is moved (14S) if the shoe does not operate according to the shoe operation.

When the operation signal or the door closing stop signal of the shoe as the door safety device is generated in the step 14S, the door closing command is released and the door opening command is generated to open the door (15S).

Here, the door close button signal XCL may be inputted to close the door by pressing the door close button mounted on the operation panel in the elevator even after a predetermined time elapses after the elevator call signal is generated. At this time, the door close button invalid signal (XCLCUT) prevents the door from being closed manually, thereby reducing the power consumption, and the fault detection signal (PHERROR) automatically releases the door close button invalid signal (XCLCUT) in the event of a photoelectric device failure. The door may be closed by the door close button signal XCL.

On the other hand, if the photoelectric device is not broken in the step 13S, the photonic device detects passengers between doors and the photoelectric device operates abnormally despite the absence of passengers between doors due to a wrong cause. When the device is activated, the operation signal XPHB is input (16S). Therefore, when the optoelectronic device is operated, the operation time is counted through a timer (17S). If the operation time is less than a predetermined time, the optoelectronic device operates normally and detects a person or an object between the doors. (18S).

If the operation time is more than a predetermined time in step 18S, it is determined that the photoelectric device malfunctions due to an abnormality of the photoelectric device even when there are no people or objects between the doors (19S), and a forced door open command is issued. At the same time, the photoelectric device fault signal is output (20S).

When the fault signal is output from the photoelectric device, it is determined whether the shoe operation is abnormal. If the shoe operation is abnormal, the door closing command signal is output to perform the forced opening operation of the door. Complete the operation and move the elevator to the calling floor (14S).

That is, when the door is closed within the normal operation time, the time counter value of the photoelectric device failure detection signal, which is a timer, is reset, and the time counter value of the failure detection signal starts from the time when the lift call signal CALL occurs. It is set.

If the photovoltaic device is normal or there are no passengers between the doors, the photoelectric device operation signal is canceled, so the counter value of the fault detection signal is reset. The device operation signal and the door closing stop signal are input and the door cannot be closed because the normally closed circuit contact is connected by the coil part.

The fault detection signal is set in the photoelectric device if this abnormal operation continues for a time (e.g., 30 seconds) far exceeding the time normally required for the passenger to get off.

When the fault detection signal is set, the door closing stop signal is forcibly released to the normally closed circuit contact and a door closing command is applied.

Therefore, even if the photoelectric device fault detection signal PHERROR is generated, the elevator can continue to operate.

As described above, the elevator door control apparatus and control method of the present invention have the following effects.

First, because the photoelectric device fault detection signal is maintained, the door closing stop signal is always released.The door close command signal is operated only by the lifter call signal, the automatic door closing time, and the mechanical safety device operation signal. Is automatically disconnected to save power and continue to operate the elevator.

Second, when the door close completion signal is turned off to indicate the state that the photoelectric device failure detection signal is set to the outside, a fricker signal, which is a failure indication signal, can be displayed to the outside, so as to promptly identify the failure situation and use the door closed button of passengers. It is possible to minimize the inconvenience of using the elevator.

Claims (2)

A failure detection unit installed inside the elevator door to detect a failure of the photoelectric device and output a failure signal; A door closing command unit for instructing the door to be closed when there is no operation signal of the elevator shoe and a door closing blocking signal and a call signal of the elevator, and releasing the door closing blocking signal when there is a failure signal of the photoelectric device; A door opening command unit generating an opening command of the elevator door; A door closing stop command unit outputting only a door closing stop signal when the elevator door closing signal and the failure signal of the photoelectric device are not generated; And a display unit which displays a failure of the photoelectric device when another signal is detected in the failure of the photoelectric device by the failure detection unit. A first step of instructing the door to be closed and determining the abnormal operation of the photoelectric device and the shoe when an elevator call signal is generated; A second step of performing an elevator door forced opening step if the operation of the photoelectric device and the shoe is abnormal in the first step, and closing the elevator door and moving the elevator to a calling floor if it is normal; The operation time of the photoelectric device is counted in the first step, and when a predetermined time elapses, the operation of the photoelectric device is determined to be a failure of the photoelectric device, and the forced opening command of the elevator door is released, and the elevator door is forced to open according to the abnormality of the elevator shoe operation. Elevator door control method characterized in that it comprises a third step and repeating the step of closing.