JPH0780665B2 - Elevator door control device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for controlling the opening / closing of an elevator door, and more particularly, to a device that normally opens / closes even when a device for detecting the opening / closing position of the door fails. The present invention relates to an elevator door control device that can be controlled and can easily investigate a failure part.

[Prior Art] As a conventional technology related to an elevator door control device, for example, a technology described in Japanese Patent Publication No. 2-272 is known.

This type of conventional technology uses mechanical contacts, optical switches, etc. as means for detecting the opening / closing position of the door, and by using these, it detects the moving position of the door necessary for opening / closing control of the door and opens / closes the door. For example, in the case of using an optical switch, even when the optical switch is normally shielded from light,
Alternatively, even when light is blocked due to a failure due to adhesion of dust or oil, the door is controlled at a low speed to ensure safety for passengers.

[Problems to be Solved by the Invention] In the above-described conventional technique, an optical switch is used to detect the opening / closing position of the door, so that a switch as a switch is used as compared with the case where a conventional mechanical contact is used. I was able to extend the life significantly. However, in this conventional technique, when the optical switch is shielded by dust, oil, or the like, the operating state is exactly the same as in the case of normal operation, and therefore periodic maintenance such as cleaning of the optical switch is required. There is a problem of doing.

Further, in the above-mentioned conventional technology, if the optical switch malfunctions because it is shielded by dust, oil, or the like, and it malfunctions, the entire opening / closing section from the open end to the closed end of the door may be controlled to open / close at a low speed. It has a problem that service performance is deteriorated.

The above-mentioned conventional technique can easily detect and detect the failure of the optical switch from the state of the opening / closing operation of the door. However, in the prior art, in order to return to a normal state after the occurrence of a failure of the optical switch, the customer or passengers discover the failure, and the person who finds the failure notifies the elevator maintenance company of the abnormality, and the maintenance is performed. Since the maintenance personnel must rush from the company to carry out inspections, repairs, and restore normal operation, if left unreported without the notification in the above section, the abnormal condition will continue for a long time and the elevator service performance will be reduced. In addition to the decrease, there is a problem in that the responsiveness to the failure is insufficient in terms of maintenance.

Further, due to the abnormality of the door position detecting means, it is not possible to normally decelerate the door, which is dangerous.

An object of the present invention is to provide an elevator door control device capable of performing safe door deceleration control even if there is an abnormality in the door position detection means.

Another object of the present invention is to speed up recovery to normal and suppress deterioration of serviceability while continuing safe door deceleration control even if there is an abnormality.

[Means for Solving the Problem] A feature of the present invention is that first deceleration start point detection means for detecting a door opening or closing door deceleration start point by a signal generated according to rotation of a door drive motor, Second deceleration start point detection means that is arranged on the door opening / closing path and operates when the door reaches the opening or closing door deceleration start point, and the first and second deceleration starting point detection means during the door opening or closing operation. Means for decelerating the door drive motor in response to the output of any one of the means.

Another feature of the present invention is that, when an output is generated from only one of the first and second deceleration start point detecting means, or when such an output has reached a predetermined number of times, It is to send an abnormal signal.

[Operation] First deceleration start point detection means for detecting a door opening or closing door deceleration starting point by a signal generated according to the rotation of the door driving motor, and the door arranged on the door opening / closing path to start the opening or closing door deceleration. Since it is extremely unlikely that both of the second deceleration start point detecting means that operate when the point is reached are abnormal at the same time, deceleration control of the door by any one of the outputs causes the door to operate safely.

In this way, while maintaining normal door deceleration,
If it is restored by transmitting an abnormal signal, serviceability will not be deteriorated.

[Embodiment] An embodiment of an elevator door control device according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a flow chart for explaining its operation. First
In the figure, 1 is a microcomputer (MPU), 4 is a base drive circuit (BDC), 5 is an I / O input / output buffer,
6 is position detecting means, 7 is an electric motor, 8 is a drive element, 10 is an elevator control device, 11 is closing end detecting means, 12 is closing door deceleration point detecting means, 13 is opening door deceleration point detecting means, and 14 is opening end detection. Means, 15 is a position detection cam, 16 is a door, and 20 is a door control unit.

FIG. 1 shows the overall configuration of an elevator device including a door control device according to the present invention. The elevator device includes an elevator control device 10 for controlling the operation of the elevator and a door for controlling an elevator door 16. Control unit 20
An electric motor 7 for driving the door 16, a drive element 8 such as an inverter for driving and controlling the electric motor 7, and a position detecting means 6.

In the elevator device configured as described above, the door control device 20 is composed of the MPU 1, the ROM 2, the RAM 3, the base drive circuit 4 for controlling the door drive element 8, and the I / O input / output buffer 5.

Further, the door 16 is configured to be driven by the electric motor 7 via a pulley and a belt, and a position attached to the door 16 for detecting that the door 16 is located at a closed end or an open end. A detection cam 15 is provided, and a closing end detection means 11 is provided on the frame of the door, a door opening deceleration point detection means 13 for detecting a position where deceleration of the door is started during the door opening operation, and deceleration of the door is started during the door closing operation. Door closing deceleration checking means for detecting position 12
And an open end detecting means 14 is attached.

The position detecting means 6 is attached to the electric motor 7 and is composed of a rotary encoder or the like which converts the rotation of the electric motor 7 into a pulse signal and gives it to the door control unit 20.

The door control unit 20 receives the detection signals from the position detection means 6, the closed end detection means 11, the open end detection means 14 and the command from the elevator control device 10 via the I / O input / output buffer 5, and the MPU 1 Give to. The MPU1 uses the ROM2, RAM3 based on the given signals and commands, or determines the control method for the door 16 based on the data in these memories, and the drive element for driving the electric motor 7. The control signal for 8 is output via BDC4.

Next, the operation of the embodiment of the present invention shown in FIG. 1 will be described with reference to the flow shown in FIG.

(1) The MPU 1 checks the operating state of the closed end detection means 11, and if the closed end detection means 11 is operating and there is no door open command output signal from the elevator control device 10,
The door is stopped and held with the door closed (steps 401 to 403).

(2) In step 202, when the opening command signal is output from the elevator control device 10, the MPU 1 starts the door opening operation and detects the position by using the output signal from the closed end detecting means 11 as a starting point. The counting of the output pulse signal from the means 6 is started, and the door is accelerated with a predetermined acceleration to move the door. Then, the operation of accelerating the door with a predetermined acceleration is continued for a predetermined time (steps 404 to 407).

(3) When it is detected in step 407 that a predetermined time has elapsed, the acceleration is terminated and the door is run at a predetermined rated speed. After that, when the door further moves, the integrated value obtained by counting the output pulse signals from the position detecting means 6 reaches the first predetermined value, and the door opening deceleration point detecting means 13 operates, the door at the rated speed is reached. Stop running at the rated speed of and switch to running in deceleration mode. Next, when the door is further moved, the integrated value reaches the second predetermined value, and the opening end detecting means 14 operates to detect that the door reaches the opening end, the speed of the door. Switch the command from deceleration mode to door stop mode and stop the door (steps 407 to 409, 414 to 4
19).

(4) In step 409, if the integrated value does not reach the first predetermined value and the door opening deceleration point detection means 13 does not operate, the door acceleration is terminated as in the case of (3). ,
The vehicle is run at the rated speed (steps 409, 410, 408).

(5) In steps 409 and 410, when it is detected that the door opening deceleration point detecting means 13 operates before the integrated value reaches the first predetermined value, the position detecting means 6 or the door opening deceleration inspection Since it can be determined that the output means 13 is out of order, an abnormal mode processing routine is performed to issue a failure signal to the position detecting means 6 or the door opening deceleration point detecting means 13 and the speed command for the door is rated to maintain safety. The running mode is switched to the deceleration running mode (steps 411 to 413).

(6) In step 414, if the door opening deceleration point detecting means 13 does not operate even if the integrated value reaches the first predetermined value, the position detecting means 6 or the door opening deceleration inspection is performed as described above. Since it can be determined that the output means 13 is out of order, the same processing as the above (5) is executed (step 41).
1 to 413).

(7) In step 416, if the integrated value does not reach the second predetermined value and the open end detecting means 14 does not operate, the door has not reached the open end, so the process returns to step 415 to decelerate the door. Run as it is in mode. Further, if the open end detecting means 13 operates before the integrated value reaches the second predetermined value, it can be determined that the position detecting means 6 or the open end detecting means 14 has a failure, so that the door stop processing is performed. After that, an abnormal mode processing routine is performed to send a failure signal of the position detecting means 6 or the open end detecting means 14 to stop the door (steps 417, 420 to 423).

(8) In step 401, the closed end detecting means 11 is inoperative,
Moreover, when the open end detecting means 14 is also inoperative, the position of the door is unclear, so safety is emphasized, the speed command of the door is switched to the low speed mode, and the opening output from the elevator control device 10 is performed. Alternatively, run the door once according to the closing command, and after the door reaches the closed or open end, step
Return to operation after 401 (steps 401, 424, 427,
428).

(9) In step 424, when the open end detecting means 14 is operating, the door is located at the open end, and henceforth,
According to the close command output signal from the elevator control device 10,
In the same order of steps as when opening the door in steps 401 to 423,
Stop, hold and close the doors (step 424)
~ 427).

In the configuration and operation of the one embodiment of the present invention described above, the position detection means 6 and the processing of steps 405 to 409 constitute the first deceleration start point detection means, and the closed door deceleration check is performed. The output means 12 and the door opening deceleration point detection means 13 are the second
Of the deceleration start point. Also, step 41
The processes of 2 and 415 constitute means for decelerating the door drive motor, and steps 413 and 422 constitute means for transmitting an abnormality occurrence signal.

As described above with reference to FIG. 2, the first embodiment of the present invention described above, the position detector 6, open end and closed end detection means 14, 11, open door deceleration point and closed door deceleration point detection means 13, 12
When a failure occurs in the device, processing for transmitting an abnormality occurrence signal and stopping the door or switching to the deceleration mode is performed.

However, the elevator control device 10 controls a large amount of electric power to drive and control the elevator car, which causes a lot of noise that causes malfunction of the electronic device. In addition, when a switch or the like is used as the detecting means, a contact failure may occur temporarily, but then the device may naturally return to the normal state.

Therefore, in the embodiment of the present invention, if the processing such as the deceleration mode and the stop is continuously performed after the occurrence of only one and only transient failure or malfunction, the service performance is significantly deteriorated. It is possible to store the history of abnormalities due to the malfunctions and malfunctions of the above-mentioned detection means, and switch to the deceleration mode, stop, etc. processing when the abnormalities occur a predetermined number of times.

According to the above-described embodiment of the present invention, the door position detecting means such as a rotary encoder and the open end and closed end detecting means are provided, and the moving position of the door with the open end and closed end detecting means as a starting point. Since it is possible to control the speed of the door based on the counted value by counting, the position detecting means using many optical switches, mechanical switches, etc. at the opening / closing intermediate position of the door, as in the case of the prior art. Can be completely eliminated, and reliability can be improved. Further, when a failure occurs in the position detecting means, the open end and the closed end detecting means, by transmitting an abnormality occurrence signal, it is possible to shorten the time from abnormality occurrence to repair and restoration, thereby improving service performance. The drop can be controlled.

Further, a door deceleration point and a door deceleration point detection means for detecting the position where the door deceleration is started are further provided, and the switching processing to the door deceleration mode is performed by mutual comparison with the count value output from the position detection means. Since the operation is performed, even if one of the position detecting means and the opening door deceleration point and the closing door deceleration point detecting means fails, the door can be switched to the deceleration mode. Can be improved.

[Effect of the Invention] As described above, according to the present invention, it is provided with the position detecting means for detecting the moving position of the door, the open end, the closed end detecting means, the open door deceleration point, and the closed door deceleration point detecting means. Since the MPU can control the speed of the door based on the output signals from these detection means, there is no need to detect the position of the door in the middle part of the opening and closing of the door, and the reliability of the opening and closing control of the door can be improved. It is possible to improve the integrity.

Further, the MPU monitors the operating state of the detection means and can immediately send an abnormality occurrence signal when an abnormality occurs, so that the time from the occurrence of the abnormality to the restoration can be shortened, and the service performance of the elevator can be improved. The decrease can be suppressed.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a flow chart for explaining its operation. 1 ... Microcomputer (MPU), 4 ... Base drive circuit, 5 ... I / O input / output buffer, 6 ... Position detection means, 7 ... Electric motor, 8 ... Drive element, 10 ... Elevator control device , 11 ...... Closed end detecting means, 12 ...... Closed door deceleration point detecting means, 13 ...... Opening door deceleration point detecting means, 14 ...... Open end detecting means, 15 ...... Position detection cam, 16 ...... Door, 20 ... … Door control.

Claims (3)

[Claims] 1. A door control device for an elevator, comprising: means for detecting a door opening or closing door deceleration starting point; and speed control means for decelerating a door driving motor in response to an output of the deceleration starting point detecting means. First deceleration start point detection means for detecting a door opening or closing door deceleration start point by a signal generated according to rotation of the door drive motor, and a door arranged on the door opening / closing path, the door being the door opening or closing door deceleration start point And a second deceleration start point detection means that operates when the output of the first deceleration start point is reached, and a second deceleration start point detection means that operates when the door is opened or closed.
A door control device for an elevator, comprising: means for decelerating the door drive motor. 2. A door control device for an elevator comprising: means for detecting a door opening or closing deceleration start point; and speed control means for decelerating a door drive motor in response to an output of the deceleration start point detection means. First deceleration start point detection means for detecting a door opening or closing deceleration start point by a signal generated according to the rotation of the door driving motor, and a door arranged on the door opening / closing path, the door being the door opening or closing deceleration start point In response to the output of only one of the first deceleration start point detection means and the second deceleration start point detection means operating when the door is opened or closed. And a means for transmitting an abnormality occurrence signal while decelerating the door drive motor, and an elevator door control device. 3. An elevator door control device comprising means for detecting a door opening or closing deceleration start point and speed control means for decelerating a door drive motor in response to an output of the deceleration start point detection means. First deceleration start point detection means for detecting a door opening or closing deceleration start point by a signal generated according to the rotation of the door driving motor, and a door arranged on the door opening / closing path, the door being the door opening or closing deceleration start point In response to the output of only one of the first deceleration start point detection means and the second deceleration start point detection means operating when the door is opened or closed. And a means for decelerating the door drive motor and a means for transmitting an abnormality occurrence signal in response to the occurrence of the output of only one of a predetermined number of times, and the elevator door control. Dress .