JP3925118B2 - Electric switch opening and closing method and electric switch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an opening / closing method and an electric switching device that can detect an abnormality of an electric switch at an early stage.
[0002]
[Prior art]
Conventionally, a power window has been known as an example of an electric switch. In order to prevent a foreign object such as a person or an object from being caught, a sensor for detecting the pinching is attached to the sash, or the motor rotation speed or the motor current is set. If it is detected or exceeds a certain threshold value, it is determined that the glass is caught, and control is performed to reverse the glass.
[0003]
[Problems to be solved by the invention]
However, if an abnormality occurs in the sensor for detecting pinching, current detection, etc., pinching cannot be detected, which may lead to a serious accident. was there.
[0004]
For this reason, even if an abnormality occurs in the pinch detection unit, it is necessary to prepare another pinch detection unit as a backup and ensure safety on both sides.
[0005]
SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and provides a highly safe opening / closing method of an electric switch and an electric switching device that can detect and avoid abnormalities such as pinching at an early stage even when there is an abnormality in a sensor or the like. The purpose is to provide.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the opening / closing method of the electric switch according to the present invention sets the fully closed position (or fully opened position) to the minimum pulse count value 0 by the pulse of the pulse generating means, and fully opens the position (or fully closed position). Is set to the maximum pulse count value, the time required to move from the current position to the fully open position (or the fully closed position) is measured, and stored in the microcomputer in a table that compares the timer and pulse count value. When the close switch or open switch is turned on, the microcomputer recognizes the current position based on the pulse count value from the pulse generation means, and counts the current position and the movement distance to the fully closed position or the fully open position. calculated from the difference between the values, sets the timer in accordance with the calculated pulse count value, starts the motor in the closing direction or the opening direction A first step that, after the first step, and counting the pulses from the pulse generating means, when it reaches a minimum pulse count or the maximum pulse count value predetermined, the timer is time-up before a certain stomach to reach And a second step of stopping the electric motor when the operation is performed.
[0007]
Further, when the timer expires while the motor is operating, the motor is reversed.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In order to solve the above-mentioned problem, an invention according to claim 1 is an electric switch comprising an electric motor, pulse generating means for generating a pulse according to the rotation or moving speed thereof, an open switch, a closed switch, and a stop switch. , The fully closed position (or fully open position) is set to the minimum pulse count value 0 by the pulse of the pulse generating means, the fully open position (or fully closed position) is set to the maximum pulse count value, and the fully open position (or from the current position) (or The time required to move to the fully closed position) is measured and stored in advance in a microcomputer with a table that compares the timer and pulse count values. When the close switch or open switch is turned on, the micro The computer recognizes the current position based on the pulse count value from the pulse generation means, and determines whether the current position and the fully closed position or fully open position. Travel distance calculated from the difference between the pulse count value, and sets a timer corresponding to the calculated pulse count value, a first step to start the motor in the closing direction or opening direction, after the first step, from the pulse generating means counting pulses, in which the timer before have the to reach that upon reaching the minimum pulse count value or the maximum pulse count value determined in advance and a second step of stopping the motor when the time is up, An abnormality in the electric switch can be detected early, and at the same time, an overload state of the motor can be avoided.
[0009]
Further, the invention according to claim 2 reverses the electric motor when the timer expires while the electric motor is in operation, and the unsafe state such as pinching that cannot be avoided simply by stopping the electric motor continues. Can be prevented, and safety can be further improved.
[0010]
According to a third aspect of the present invention, there is provided an electric switch comprising an electric motor, pulse generating means for generating a pulse according to the rotation or moving speed thereof, and switch means having an open switch, a closed switch, and a stop switch. Timer means for setting a time according to the moving distance of the electric switch, control means for counting pulses from the pulse generating means, comparing the set time by the timer means to determine the operation of the motor, and the pulse generating means From the current position to the fully open position (or fully closed position), set the fully closed position (or fully open position) to the minimum pulse count value 0 and the fully open position (or fully closed position) to the maximum pulse count value. Measure the time required to move, and the microcomputer stored in advance in a table that compares the timer and pulse count value And Bei, when the open switch or closing switches of the switch means is turned ON, the microcomputer recognizes the current position by the pulse count from the pulse generating means, the moving distance to the current position and the fully closed position or fully open position Is determined from the difference between the pulse count values, the time corresponding to the calculated pulse count value is set, the motor is started, and after the motor is started, the pulse from the pulse generating means is set to a predetermined minimum pulse count value or maximum pulse count. an electric switchgear to stop the motor when the time set has elapsed by the timer means before some stomach to reach when it reaches a value, at the same time as the opening and closing abnormality can be detected at an early stage, the motor overload A state can be avoided.
[0011]
Further, the invention according to claim 4 is an electric opening and closing device that reversely operates the motor when the preset time of the timer means elapses while the control means is operating the motor, and cannot be avoided simply by stopping the motor. It is possible to prevent an unsafe state such as pinching from continuing, and to further improve safety.
[0012]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0013]
Example 1
In FIG. 1, a pulse generating means 2 is attached to an electric motor 1, and an output signal thereof is input to a microcomputer 3. Further, signals of the open switch 4, the closed switch 5 and the stop switch 6 are input to the computer 3, and the motor 1 is driven by the motor drive circuit 9 according to the result calculated from the pulse count value from the pulse generating means 2. The window glass 8 is opened and closed through an opening / closing mechanism 7.
[0014]
First, after the power is turned on, the minimum pulse count value is set to 0 at the maximum closed position (fully closed position) of the window glass 8, and the maximum pulse count value is stored in the microcomputer 3 at the maximum open position (fully opened position). (Initial)
[0015]
When the stored maximum pulse count value (fully opened position) or minimum pulse count value 0 (fully closed position) is reached, the microcomputer 3 causes the motor drive circuit 9 to stop driving the motor 1. Is output to the motor drive circuit 9.
[0016]
However, if the maximum pulse count value (fully opened position) or the minimum pulse count value 0 (fully closed position) is not reached, the motor 1 is abnormal even though the driving state of the motor 1 is continued. Presumably in an (overloaded or constrained) state.
[0017]
Therefore, when the electric motor 1 does not stop after a predetermined time has elapsed, it is necessary to detect an abnormality by another method to ensure safety. This method will be described with reference to the flowchart of FIG.
[0018]
First, when the close switch is turned on (S1), the movement distance from the current position to the fully closed position is obtained from the difference between the current pulse count value and the count value 0 which is the fully closed position, and the calculated pulse A timer corresponding to the count value is set (S2), and the motor is driven in the closing direction for the time set by the timer (S3).
[0019]
At the same time, the microcomputer 3 performs a pulse count of the output signal of the pulse generating means 2 (S4), and when the pulse count value becomes 0 which is the fully closed position (S5), the motor is stopped (S7). Also, when the timer expires before the pulse count value reaches 0 (fully closed position) (S6), the driving of the motor is stopped (S7).
[0020]
Here, the timer setting will be described. Measure the time required to move the distance from the current position of the window glass to the fully closed position or fully open position (time when the motor is driven in normal operation and taking into account variations), and compare the timer with the pulse count value. The table is stored in advance in the microcomputer.
[0021]
Similarly, when the closed switch is OFF and the open switch is ON (S8), the moving distance from the current position to the fully open position is obtained from the difference between the current pulse count value and the maximum count value at the fully open position, and calculated. A timer corresponding to the pulse count value thus set is set (S9), and the motor is driven in the opening direction (S10).
[0022]
At the same time, the microcomputer 3 performs pulse counting from the output signal of the pulse generating means 2 (S11), and when the pulse count value reaches the fully open position (S12), the motor is stopped (S7). Also, when the timer expires before reaching the maximum pulse count value (fully opened position) (S13), the motor 1 is stopped (S7).
[0023]
If a brushless motor provided with a commutation sensor is used, the commutation sensor can be used in place of the pulse generating means, and the configuration becomes simpler.
[0024]
Further, the pulse generating means does not need to be attached to the motor, and may be attached to a place where the pulse generating means signal is output according to the operation of the switch, for example, the switch itself.
[0025]
(Example 2)
The second embodiment relates to the avoidance of abnormality during the operation of the electric motor. What is different from the first embodiment is the operation after the timer has timed out.
[0026]
In FIG. 3, when the pulse count value at the current position reaches the stored minimum pulse count value 0 (S5), which is the fully closed position, or the maximum pulse count value (S13), which is the fully open position, the motor is stopped (S7). This is the same as in the first embodiment.
[0027]
Then, when the timer expires while the motor is operating in the closing direction (S6), the motor is reversed for a certain time (S8) and the motor is stopped (S7).
[0028]
Similarly, when the timer expires while the motor is operating in the opening direction (S14), the motor is reversed for a certain time (S15), and the motor is stopped (S7).
[0029]
In the first and second embodiments, the description has been given using the power window, but the same can be applied to the electric shutter.
[0030]
And if it uses for the power window of a motor vehicle, people with little operation knowledge, such as a child and an elderly person, will not be involved in unsafely, and the safety of a car will improve.
[0031]
Moreover, if it is used for an electric shutter that is often installed in places where people and vehicles go in and out, such as a garage, the safety for people and vehicles can be improved.
[0032]
【The invention's effect】
As is apparent from the above embodiments, according to the first and third aspects of the invention, an abnormality of the electric switch can be detected, and the electric motor can be reliably stopped and protected.
[0033]
Further, according to the second and fourth aspects of the invention, it is not possible to escape from the abnormal state simply by stopping the electric motor. Therefore, the safety is improved by reversing the electric motor.
[0034]
Therefore, it is possible to provide a highly safe electric switchgear that can detect and avoid abnormalities such as pinching at an early stage.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an electric switchgear showing an embodiment of the present invention. FIG. 2 is a flowchart of an opening and closing method in Embodiment 1 of the present invention. FIG. 3 is a flowchart of an opening and closing method in Embodiment 2 of the present invention. Explanation】
DESCRIPTION OF SYMBOLS 1 Electric motor 2 Pulse generation means 3 Microcomputer 4 Open switch 5 Close switch 6 Stop switch 7 Opening / closing mechanism 8 Window glass 9 Motor drive circuit

Claims (4)

In an electric switch equipped with an electric motor and pulse generating means for generating a pulse in accordance with its rotation or moving speed, an open switch, a closed switch, and a stop switch, a fully closed position (or a fully open position) by a pulse of the pulse generating means Set the minimum pulse count value to 0, set the fully open position (or fully closed position) to the maximum pulse count value, measure the time required to move from the current position to the fully open position (or fully closed position), A table in which the timer and the pulse count value are compared is stored in advance in the microcomputer. When the close switch or the open switch is turned on, the microcomputer recognizes the current position from the pulse count value from the pulse generating means. Calculates the movement distance from the current position to the fully closed position or fully open position based on the difference in pulse count value Sets a timer corresponding to the pulse count value, a first step to start the motor in the closing direction or opening direction, after the first step, and counting the pulses from the pulse generating means, the minimum pulse count value or predetermined the second step and the opening and closing process of the electric switch provided with said timer before some stomach to reach when it reaches a maximum pulse count value stops motor when the time is up.   The method for opening and closing an electric switch according to claim 1, wherein when the timer expires while the electric motor is operating, the electric motor is reversed. An electric switch comprising an electric motor, pulse generating means for generating a pulse in accordance with its rotation or moving speed, and switch means having an open switch, a closed switch, and a stop switch, according to the moving distance of the electric switch The timer means for setting the time, the control means for counting the pulses from the pulse generating means and comparing the set time by the timer means to determine the operation of the motor, and the fully closed position (or the fully opened position by the pulse of the pulse generating means) Position) is set to the minimum pulse count value 0, the fully open position (or fully closed position) is set to the maximum pulse count value, and the time required to move from the current position to the fully open position (or fully closed position) is measured. and, it includes a microcomputer that is pre-stored in the contrasted timer and pulse count value table, Hirakisu switching means When pitch or closed switch is turned ON, the difference in the microcomputer recognizes the current position by the pulse count from the pulse generating means, pulse count value movement distance to the current position and the fully closed position or fully open position The time is set according to the calculated pulse count value , the motor is started, and after starting the motor, the pulse from the pulse generating means reaches the predetermined minimum pulse count value or the maximum pulse count value. There is an electric switchgear to stop the motor when the time set has elapsed by the timer means before reach. 4. The electric switchgear according to claim 3 , wherein the control means reversely operates the motor when a time preset by the timer means elapses while the motor is operating.

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