JP3336702B2 - Elevator door opening and closing control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for controlling the opening and closing of an elevator door, and more particularly to a device for preventing a malfunction from being erroneously detected.

[0002]

BACKGROUND OF THE INVENTION Figures 3 and 4, a diagram illustrating the opening and closing control device of a conventional elevator door, FIG. 3 is a block diagram, FIG. 4
7 is an operation waveform diagram when the door is normally closed.

In FIG. 3 , (1) is a power source, (2) is a power source (1)
A power circuit connected to the power circuit (3) and driven by the gate signal generation circuit (3), (4) is a motor connected to the power circuit (2) and drives the door, and (5) is a pulse corresponding to the rotation speed of the motor (4). (6) is a control panel for controlling the elevator, (7) is a door control device, CPU (7A), ROM (7B),
It has a RAM (7C), a pulse count unit (7D), an input / output port (7E), and a PWM (pulse width modulation) unit (7F).

The pulse count unit (7D) is connected to the speed detector (5), and the input / output port (7E) is connected to the elevator control panel.
In (6), the PWM unit (7F) is connected to the gate signal generation circuit (3).

The conventional elevator door opening / closing control device is configured as described above. When a door opening command or a door closing command is generated from the elevator control panel (6), it is input to an input / output port (7E). speed command value which indicates a ROM (7B) corresponds to FIG. 4 (a) (11) are read into CPU (7A). This speed command value (11) counts the pulse output from the speed detector (5) by the pulse count unit (7D), and the CPU (7A) reads the count value to calculate the position of the door,
The value corresponding to that position is read from the ROM (7B) and output.

[0006] Based on the CPU (7A) is read speed command value (11), calculates FIG 4 (B) are shown the torque command value required for the rotation of the electric motor (4) and (12A). This torque command value (12
A) is controlled so as not to exceed the torque limit value (13) shown in FIG. 4 (B). Then, the calculated torque command value (12A)
Is sent to the PWM unit (7F), where it is converted to a gate signal and sent to the gate signal generation circuit (3).

The gate signal generating circuit (3) outputs a gate signal to drive the power circuit (2) to rotate the electric motor (4). When the motor (4) rotates, the speed detector (5) also rotates,
The output is counted, and CP is calculated based on the count value.
U (7A) calculates the position of the door and the rotation speed (14A) of the electric motor (4) shown in FIG. 4 (A) as described above, and the rotation speed (14A) of the electric motor (4) is the speed command value ( The speed is controlled to follow 11).

On the other hand, the elevator door opening / closing control device as described above needs to be able to detect a failure of the speed detector (5). Therefore, for example, Japanese Patent Application Laid-Open
According to Japanese Patent No. 3487, the speed command value (11) is equal to or more than the set value,
In addition, the state in which the rotation speed (14A) of the motor (4) is zero continues for a predetermined time, and furthermore, the failure of the speed detector (5) is determined based on the operation status of the door deceleration start position switch, and a failure signal is generated. After that, it has been proposed to control the voltage applied to the electric motor (4) to zero to stop the door.

[0009]

In the conventional elevator door opening / closing control apparatus as described above, the state where the speed command value (11) is equal to or higher than the set value and the rotation speed (14A) of the electric motor (4) is zero. When a predetermined time has elapsed, it is determined that the speed detector (5) has failed and the door is stopped. However, the speed command value
Even if (11) is output at or above the set value, if the actual door opening / closing force is weak, the door is stopped due to human actions such as mischief, clogging of the door sill, etc., and the rotation of the motor (4) speed
(14A) becomes zero.

[0010] Therefore, there is a problem that the operation efficiency is deteriorated by erroneously detecting that the speed detector (5) has failed and stopping the door to disable the elevator.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is capable of reliably detecting a failure of a speed detector without erroneously detecting a failure of the speed detector, thereby preventing deterioration of the operation efficiency of the elevator. An object of the present invention is to provide an elevator door opening / closing control device.

[0012]

Means for Solving the Problems] switching controller for elevator doors according to this inventions is next rotational speed is zero and instantaneously from the state where the motor is rotating at the rotational speed higher than a predetermined value for opening and closing the door and forcing its state failure determining means which operates when continued for a certain time or more, and the rotational speed and the failure determining means operates to stop the control to follow the speed command value, to drive the motor by a predetermined torque command value It is provided with driving means.

[0013]

[Action] Oite this inventions, when the motor is continued for a predetermined value or more rotational speed rotational rotating speed by instantaneously from the state which was becomes zero, and its state a predetermined time or more, fast
The speed feedback control is stopped, and
Since you so that to drive the electric motive by the torque command value, at the door-opening start, such as during the door-closing start, passenger mischief,
The door by dust clogging is erroneously detected as a failure of the speed detector be constrained rather than the door is forcibly opened and closed.

[0014]

PREFERRED EMBODIMENTS FIG. 1 and FIG. 2 a view showing an embodiment of the inventions, FIG 1 is an operation waveform diagram, Figure 2 is an operation flow chart, similarly to the conventional device parts are indicated by the same reference numerals. The figure
3 is shared with the first embodiment.

[0015] In the switching controlgear of configured elevators door as shown in FIG. 3, pulse by the rotation speed of the motor as shown in FIG. 1 during door opening and closing operation (4) (14A) is the speed detector (5) And sent to the pulse count unit (7D). The pulse count unit (7D) counts the pulses and sends the count value to the CPU (7A). The CPU (7A) determines whether the current door status instantaneously becomes zero from a state in which the rotation speed (14A) of the electric motor (4) is equal to or higher than a predetermined value, and determines whether or not this has continued for a certain period of time. As a result, when it is determined that these conditions are satisfied, it is determined that the speed detector (5) has failed and a failure signal is generated.

Next, the above operation will be described with reference to FIG. The program of this flowchart is stored in the ROM (7
B). First, in step S1, the previous rotation speed is retracted to V1, the previous rotation speed is retracted to V2, and the current rotation speed is entered to V. Next, in step S2, it is determined whether or not the current rotation speed V is zero.
Otherwise, the process proceeds to step S6. In step S3, it is determined whether the detection counter t is zero, that is, whether time counting is in progress. If counting is in progress, the process proceeds to step S5, and if not, the process proceeds to step S4.

In step S4, it is determined whether or not the previous rotation speed V2, which has been retracted in step S1, is equal to or greater than a predetermined value A (a speed at which the rotation speed does not become zero instantaneously due to mischief, dust clogging, or the like). If the value is equal to or more than the predetermined value A, the process proceeds to step S5. If the value is smaller than the predetermined value A, the process proceeds to step S6. That is, when the speed becomes zero instantaneously from the time Y, as in the case of the rotation speed (14B) in FIG. 1A, it is determined that there is an abnormality, and 1 is added to the detection counter t in step S5. If the rotational speed does not become zero instantaneously as in the case of the rotational speed (14C) of (1), it is determined that there is no abnormality and the detection counter t is reset in step S6.

After counting up in step S5, it is determined whether or not the detection counter t is equal to a predetermined number n in step S7.
That is, it is determined whether a predetermined time has elapsed since the abnormality was detected. If it is determined that the time has elapsed, a failure flag is set in step S8, a failure signal is output, and the motor (4) is stopped. After clearing the detection counter in step S6 or when it is determined in step S7 that the predetermined time has not elapsed, the failure flag is reset in step S9 every time.

Further, in this embodiment , when a failure of the speed detector (5) is detected, the current speed and position of the door are not normal values. Stop the feedback control and set the motor to the specified torque command value.
(4) that is configured to drive.

That is, a predetermined torque command value (not shown) at the time of failure detection is read from the ROM (7B), and the motor (4) is driven by the torque command value to open and close the door.
The predetermined torque command value is stored in the ROM (7B) in advance, and the speed detector (5) is not normal. The value is set so that there is no problem even if a person is pinched during opening and closing.

The above operation will be described more specifically. When the speed detector (5) fails and the CPU (7A) performs a failure determination process,
The fault flag is set. The CPU (7A) detects the failure flag, stops the speed feedback processing that was performed until immediately before the failure, and changes to the processing at the time of failure detection. In the failure detection process,
First, a failure detection torque command value is read from the ROM (7B).

Based on the read torque command value, the CPU (7A) converts the torque command value required for rotation of the electric motor (4) into PWM.
Output to the gate signal generation circuit (3) by the unit (7F). Here, the signal is converted into a gate signal, and the power circuit (2) is driven by the output of the gate signal generation circuit (3), so that the motor
Rotate (4). Then, the door opening and closing operation due to the failure detection time for the torque command value, as compared with normal door opening and closing operation, since the movement of the door becomes unsmooth, abnormality is easily found, it is convenient to maintenance and inspection. Until then, such processing is repeated.

[0023]

This inventions As described above, according to the present invention, when the electric motor is continued for a predetermined value or more rotational speed rotational rotating speed by instantaneously from the state which was becomes zero, and its state a predetermined time or more, Judge that the speed detector has failed and return the speed
Stop the control and drive the motor with the specified torque command value
Having to so that is, at the door-opening start, such as during the door-closing start, passenger mischief, dust clogging without door is erroneously detected as a failure of the speed detector be restrained etc., door forced It opens and closes without stopping the elevator,
There is an effect that operation efficiency can be improved.

[Brief description of the drawings]

[1] Operation waveform diagram showing an embodiment of the invention of this.

FIG. 2 is an operation flowchart showing an embodiment of the present invention .

[Figure 3] invention and block diagram illustrating a switching controller for conventional elevator door this.

FIG. 4 is an operation waveform diagram when the normal door is closed according to FIG. 3;

[Explanation of symbols]

4 motor , 5 speed detector , 11 speed command value , 14
A to 14C rotation speed

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-294587 (JP, A) JP-A-3-238286 (JP, A) JP-A-2-300080 (JP, A) (58) Field (Int. Cl. ⁷ , DB name) B66B 1/00-13/30

Claims (1)

(57) [Claims] 1. A method for detecting a position of the door by detecting a rotation speed of an electric motor for opening and closing the door, generating a speed command value based on the position, and causing the rotation speed to follow the speed command value. In the door opening and closing control device that outputs a torque command value to the door to open and close the door, the rotation speed instantaneously becomes zero from a state in which the electric motor is rotating at a rotation speed equal to or higher than a predetermined value, and the state becomes Failure determination means that operates when the operation continues for a predetermined time or more , and the failure determination means operates.
Stop the control to make the rotation speed follow the speed command value
And the motor is driven by a predetermined torque command value.
An opening and closing control device for an elevator door, comprising a moving means .