JPH07109149B2 - Drive device with overload protection device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive unit with an overload protection device.
For more details on the installation, refer to
Sidewind windshield and sunroof roof
Overload protection device that prevents accidents when opening and closing panels
Drive device. [0002] Conventionally, as a drive device with an overload protection device
Is an apparatus described in Japanese Patent Application Laid-Open No. 58-222792.
It has been known. This device is driven by drive means
When the opening cover moves, the load on the drive means
Learn the comparison value used to detect the overload of the driving means
It can be stored in memory and the stored comparison value can be compared with the load.
Is used to detect the overload of the opening covering material. So
Then, stop the opening and closing of the opening covering in the middle of fully opening and closing,
When it is opened and closed again, overcurrent due to static friction force etc.
Since it will flow, in the above case, the specified time is exceeded.
The load detection is stopped. [0003] However, the above-mentioned
With conventional technology, there is time to stop overload detection.
Therefore, there is a problem that overload cannot be detected during this period.
It For example, the opening covering moves and stops repeatedly at ultra-short cycles.
When the load gradually increases while
May not be able to detect overload. Therefore, the present invention has been made in view of the above problems.
The opening and closing of the opening covering is in the middle of fully opening and closing.
Even when stopped and opened and closed again, the comparison value is learned properly.
Learn to overload protection device that can detect overload
An object of the present invention is to provide an auxiliary drive device. In order to achieve the above-mentioned object
The drive device with overload protection device of the present invention is shown in FIG.
Driving means for opening and closing an opening covering member that covers the opening
And the drive at the time of opening and closing the opening covering by the drive means
Load detecting means for detecting the load of the means, and the drive means
When the opening cover is moved by being driven by the
The overload of the drive means based on the load of the drive means
Comparison value learning means for learning the comparison value used for detection,
The opening covering is moved by being driven by the driving means.
When the above-mentioned detected load value of the driving means is learned
And a comparison means for comparing
The detected load value of the drive means is larger than the above comparison value.
If it is determined that the
Drive load reducing means,
Comparison value learned before stopping when the driving means is started
The comparison value is learned based on. The drive device with the overload protection device of the present invention is as follows.
To work. The drive device with the overload protection device of the present invention is
Opening of the opening covering (M1) for covering the opening by means (M2)
Closes but is opened by being driven by the driving means (M2)
When the covering material (M1) moves, the load detection means (M3)
The value based on the load of the driving means (M2) detected by
The comparison value learning means (M4) learns as a comparison value. Na
When the drive means (M2) is started, the comparison value when stopped
Based on this, learning of the comparison value is performed. And drive means
Driven by (M2), the opening cover (M1) moves
The driver's hand detected by the load detection means (M3) when
By the load value of the stage (M2) and the comparison value learning means (M4)
The comparison with the learned comparison value is performed by the comparison means (M5).
The result of comparison is detected from the learned comparison value.
It is determined that the load value of the driving means (M2) is larger.
When the drive means (M6)
The operation of 2) works to forcibly reduce the load. Next, the structure of a drive unit with an overload protection device of the present invention will be described.
A preferred embodiment together with the drawings to further clarify the composition
I will explain. FIG. 2 shows the overload protection of one embodiment of the present invention.
It is a schematic structure figure showing composition of a drive with a protection device. As shown, the overload protection device of this example
The stationary drive system is a vehicle side window (hereinafter simply referred to as
(Sometimes referred to as a wind) SW window glass WG opening
It closes the window regulator WR, wheel
DC motor 1 as a drive source of the hand regulator WR,
A forward rotation relay that normally rotates the DC motor 1 when in the ON state.
-2. Reverse rotation to rotate DC motor 1 in reverse when it is in ON state
Rolling relay 3 (forward rotation relay 2 and reverse rotation relay 3 simultaneously
It is not turned on), and it affects the DC motor 1
Load detection circuit 4, which detects the load, of the windshield WG
Wind glass position sensor 6 for detecting the moving position X
It is operated when the worker decides the position of the windshield WG.
Opening of wind glass positioner 8 and wind glass WG
Electronic control device that controls closing (hereinafter simply referred to as ECU)
It is composed of 10 parts. In addition, the overload protection of this embodiment
The drive with device is connected via the ignition switch IG.
Power is supplied from the on-vehicle battery BAT. Well
In addition, in this embodiment, the side window SW, the window
De regulator WR, DC motor 1, window glass position
Position sensor 6, window glass position setter 8 etc.
It will be referred to as the window portion 12. The load detection circuit 4 includes a resistor R1 and a differential amplifier.
And a negative current flowing through the DC motor 1.
The load current I is measured by the resistor R1 (the value of the resistor R1 is very small).
Is converted to a voltage and the voltage drop due to this resistor R1
The pressure is detected by being amplified by the differential amplifier 14. C
The Indian glass position sensor 6 is a potentiometer, etc.
It is configured from the
It is output as a voltage change. In this embodiment, the win
Each time the position of the dock glass WG rises, its output voltage is
It is configured to be large. The window glass position setter 8 slides.
It consists of a variable resistor of the type
Corresponding to the position of Indian glass WG, setting position is high
It is configured to generate a higher voltage. ECU
10 is a well-known CPU 30, ROM 31, RAM 32,
Backup RAM 33, output circuit 35, input circuit 3
A logical operation circuit in which 6 and the like are mutually connected by a bus 37
Is configured. The output circuit 35 includes a forward rotation driver 40 and a reverse rotation driver 40.
The output signals are connected to the rotary driver 41 so that they can be output.
It The forward rotation driver 40 and the reverse rotation driver 41 are
Connected to the forward rotation relay 2 and reverse rotation relay 3 described above.
And when raising the windshield WG,
The output circuit 35 outputs a high-level output signal to the forward rotation driver 40.
Use a bell, and when lowering the windshield WG,
The output circuit 35 outputs a high level signal to the reverse rotation driver 41.
Let's call it Bell. This raises the wind glass WG.
When turning on, the forward rotation relay 2 is in the ON state, the reverse rotation relay
3 is turned off, and the load (driving) power of the DC motor 1 is turned on.
Current I flows from the make contact 2a of the forward rotation relay 2 to the DC motor.
To the breaker of the reverse rotation relay 3 from the DC motor 1
The resistance of the load detection circuit 4 from the break contact 3b to the point 3b
Flow to the device R1 to rotate the DC motor 1 forward. (Fig. 2
At the current Ia). On the contrary, wind rattle
When lowering the switch WG, the forward rotation relay 2 is turned off.
State, the reverse rotation relay 3 is turned on, and the DC motor 1
Load current I from the make contact 3a of the reverse rotation relay 3
From DC motor 1 to DC motor 1
From break contact 2b to break contact 2b to resistor R1
To rotate the DC motor 1 in the reverse direction (in FIG.
Flow Ib). On the other hand, the input circuit 36 has a load detection circuit as described above.
The differential amplifier 14 of the output circuit 4 and the window glass of the window 12
Position sensor 6 and window glass position setter 8
It is connected via the / D converter 42. This allows
The ECU 10 uses the DC motor 1 detected by the differential amplifier 14.
Of the load current I of the window glass position sensor 6
Movement position X of windshield WG, windshield position
Setting position SP of the window glass WG output from the setting device 8
The movement of the windshield WG based on each input value such as
The position X is preferably controlled. Next, the operation of the ECU 10 will be described with reference to FIGS.
Explanation is made using the flowcharts shown in 5 (A) to (C).
Reveal. The frame shown in FIGS. 3, 4, and 5 (A) to (C)
The chart shows “Overload” executed by the ECU 10.
“Protection process”. First, the ignition switch
When the IG is turned on, the process starts from step 100.
Be done. In step 100, after being stored in the RAM 32
So-called initial settings that return the values of the various flags described to the initial values
Is executed. After this initial setting, the process is step
Proceed to 110. At step 110, the CPU 30
Entrapment load F stored in the backup RAM 33
(X) is read and the read sandwiching load F is read.
The process of writing (X) into the RAM 32 is executed. This sandwich
The load F (X) will be described with reference to the graph shown in FIG.
It The graph shown in FIG. 6 shows the windshield position.
The movement position X of the windshield WG output by the sensor 6
The horizontal axis shows the differential based on the load current I flowing in the DC motor 1.
The motor load M (X) output from the amplifier 14 is plotted on the vertical axis.
The solid line U (X) is when the windshield is rising.
The broken line D (X) indicates the moving position when the window glass descends.
It shows the level of the motor load M (X) with respect to X, respectively.
(Hereinafter, the solid line U (X) is the ascending load U (X) and the broken line D is
(X) is referred to as a falling load D (X)). Also, the alternate long and short dash line F
(X) represents the pinching load F (X), which is lowered.
The load D (X) multiplied by a predetermined value Z (Z> 1)
It This is the motor load when rising in the steps described below.
It is compared with M (X). The moving position X is a window glass position sensor.
The voltage output from 6 is A / D converted by the A / D converter 42.
The value is 1, and 1 when the window glass WG is fully open and fully closed.
The position of the windshield is 10 so that it becomes 100 in the state.
Expressed as a digital value X divided by 0, and the value X is large
It shows that the position of the windshield WG is above
It As can be seen from this graph, generally,
The level of the data load M (X) depends on the window regulator W.
Position of windshield WG due to differences in R gear efficiency, etc.
Change significantly. Also, the graph of the falling load D (X)
The shape of F and the graph of rising load U (X) are very similar.
However, the level is off. This falling load D (X) and rising
The difference in load U (X) is the effect of the window regulator WR.
Even though the rate is almost the same during the fall and rise,
Friction force, such as wind glass WG and wind SW
Frictional force against the rubber material of the door sash and wind glass W
Affected by the weight of G and window regulator WR
This is due to the fact that the conditions are different when falling and when rising. Shi
However, the movement of the windshield WG from this graph
If the level of the descending load D (X) with respect to the position X is known,
Overloads such as things being caught in the windshield SW are directly
Level of rising load U (X) unless it is added to the flow motor 1.
It can be seen that Therefore, in this embodiment,
Is the wind glass when the wind glass WG descends.
Use the down load D (X) corresponding to the moving position X
Determine the pinching load F (X) of the window,
Store the load F (X) in the backup RAM 33
(This is done in the steps described below). This
Here, the moving position X of the windshield WG is a small object such as a finger.
Closed to the extent that it is not pinched (moving position X> F
In E), as shown in the graph of FIG.
The value of (X) is made sufficiently large. This is the windga
I made a mistake when the Las WG approached the fully closed state and became overloaded.
I didn't judge that something was caught in the window SW.
It is. In this embodiment, the pinching load F
(X) applies a predetermined value Z (Z> 1) to the falling load D (X).
Although it is a digit value, it is not a value based on the falling load D (X).
It can be used at any value, for example, down load D
As a value obtained by adding a predetermined value Z1 (Z1> 0) to (X)
Well, the value obtained by multiplying the falling load D (X) by a predetermined value Z
It may be a value obtained by adding the constant value Z1. Entrapment load F in step 110
When the process of writing (X) to the RAM 32 is completed, the process is
Go to the next step. Subsequent processing after step 120
Is a process that actually controls the operation of the windshield WG.
is there. First, in step 120,
Position setting device 8, window glass position sensor 6, differential increase
Setting of the wind glass WG output from the width device 14
Position SP, window glass movement position X, DC motor 1
A / D conversion of each analog signal of motor load M (X)
A / D converted by the device 42 and the A / D converted value
Processing to store each as a digital value in RAM 32 is performed
Be done. Here, the set position SP is the same as the moving position X described above.
Similarly, 1 at the position where the windshield WG is fully open, and the position where it is fully closed.
Is a digital value that is set to 100. Well
Also, the motor load M (X) moves the windshield WG.
Shows the load level of DC motor 1 for position X
Irrespective of whether the DC motor 1 is rotating normally or reversely, the load current I
The larger the value, the larger the value. At the following step 130, the passengers
Change of the set position SP set by the windshield position setter 8.
Whether or not there is a change, that is, in step 120
Set position SP remembered and set position SP read this time
It is determined whether there is a change between and. Where the crew
The window glass position setter 8 is operated by
When it is determined that the position SP has changed, the
The value of the load flag OF is reset to the value 0 (step
140), on the other hand, it was determined that the set position SP did not change.
Sometimes it goes directly to the next step 150. In step 150, the moving position X is set to the occupant.
To the extent that part of the limbs can no longer be caught in the window SW
It is determined whether or not it is below the fully closed position FE.
are doing. This is because the movement position X is above the position FE.
If you do, things will not be caught in the window SW
is there. Here, when the movement position X ≦ FE is satisfied,
It is determined whether the windshield WG is currently descending.
(Step 160). This determination is a process described later.
Is set to 1 when the windshield WG descends
It is carried out by determining the value of the descending flag DF. When the descending flag DF = 1, the processing is down.
Proceed to the descending process DRT, and if DF = 1, the process is
Proceed to climb processing URT. This descending process DRT and ascending process
The processing performed by the logical URT will be described with reference to the graph of FIG. 7. Figure
The graph shown in 7 is similar to the graph shown in FIG.
However, the window glass WG is fully opened and closed when it descends and rises.
Stops in the middle of, and descends when descending and rising again
Load D (X), rising load U (X), pinching load F
(X) is shown respectively. Where the descent begins
The position to start is indicated by DP and the position to start ascending is indicated by UP.
However, hereinafter, the descent start position DP and the ascending start position UP are simply referred to as
Call. In the descending process DRT, first, the motor negative
The load M (X) corresponds to the movement position X of the windshield WG.
The processing for setting the falling load level D (X) is performed (step
170). Subsequently, the moving position X is set to the descent start position DP
Is greater than the value obtained by subtracting the predetermined movement amount CW from
It is determined (step 180). Moving position X> DP-C
If it is determined that W is satisfied, the process proceeds to step 190,
If it is determined that the condition is not satisfied, the process proceeds to step 200. In step 190, the wind glass WG
To the falling load D (DP + 1) just before the stop
In step 200, the applied load is the descent load during descent.
Multiplying D (X) by a predetermined value Z, the sandwiching load F
It is stored in the backup RAM 33 as (X). this
Is due to the following reasons. Graph of falling load D (X) in FIG.
As shown in, the windshield is moved at the moving position X = DP.
The state in which the switch WG is stopped [The value of the descending load D (X) is zero.
Level], the DC motor 1
Is an overcurrent due to the motor starting current and static friction
Therefore, based on the downward load D (DP) at the stop position,
When the pinching load F (X) is set, the overload level becomes relative.
This is because it becomes low, which causes malfunctions and the like. this
Therefore, until the wind glass WG starts to work stably,
That is, it is not affected by motor starting current, static friction force, etc.
Until the moving position X = DP-CW passes,
Use the down load D (DP + 1) to insert the pinching load F (X)
It is calculated. As a result, the position of the moving position X
In the range from the descent start position DP to the position DP-CW
Shows the value of the sandwiching load F (X) in the graph of FIG.
It becomes a constant value. In addition, the trapping negative at the time of this descent start
The load F (X) is, for example, a down load D (DP + 1) and a win.
Down load D (DP-CW) where the glass window starts to move stably
Assuming a straight line connecting and and based on this assumed value
It is also possible to set it. On the other hand, in the ascending processing URT, first, the moving position
A predetermined movement amount BW is set to the ascending start position UP when the position X is raised.
It is determined whether it is smaller than the added value (step
210). It is determined that the movement position X <UP + BW is established.
Then, in step 215, the descent load D of the moving position X is
(X) Predetermined load DW based on overcurrent at motor startup
After the value obtained by adding is set as the sandwiching load F (X),
On the other hand, if it is determined that the condition is not satisfied, the process directly proceeds to step 220.
Proceed to. This is for the following reason. As shown in the graph of rising load U (X) in FIG.
As a result, the windshield WG moves at the moving position X = UP.
Stopped state [Value of rising load U (X) is zero level]
From the same way as when descending,
Due to overcurrent due to starting current and static friction force
The trapping load stored in the backup RAM 33.
Let F (X) be the comparison target of the motor load M (X) as it is.
This may cause a malfunction. For this reason,
Until the glass WG starts to move stably (UP <movement position
Place X <UP + BW), memorized pinching load F (X)
The value obtained by adding the predetermined load DW to
Then, it is the target of comparison. In step 220, the backup RAM
Sandwiching load F (X) stored in
Trapping load F (X) calculated in step 210 and win
Comparison with the motor load M (X) when the dock glass WG rises
ing. This is because the motor load M (X) when rising is
If the pinching load F (X) is exceeded,
Also for determining that an arm, finger, etc. has been caught in the hand switch
Of. Here, the motor load M (X)> F (X) is satisfied.
If it is determined to be standing, it proceeds to step 230 and then is not established.
When the determination is made, the ascending process URT is finished as it is. At step 230, an object is placed in the window SW.
Set the overload flag OF when pinched to a value of 1,
For safety, win from the moving position X where there was a pinch.
The position of the dock glass WG is lowered by a predetermined movement amount AW.
As a position for MP (hereinafter referred to as a protection position MP)
Remember. The descending process DRT and the ascending process URT described above
When completed, the process proceeds to step 250. In addition, this real sister
In the example, the pinching load F (X) at the start of descending and ascending is set.
The wind glass WG has a predetermined amount CW,
Although the period was set to move only BW, using a timer etc.
Or set a predetermined delay time with a program etc.
It is also possible to make it. In the following step 250, the overload flag O
The value of F is determined. That is, the overload flag OF = 1
If it is determined to be upright, the next protection processing SRT (step 26
0 to 280) is executed. This protection processing SRT
Sets the movement position X of the windshield WG to the step 23.
To lower to the protection position MP set at 0
Processing. First, at step 260, the moving position X and
The comparison with the protection position MP is made. Here, the moving position X>
When it is determined that MP is established, the processing is step 27.
If it is determined that the condition is not satisfied, the process proceeds to step 0.
Go to page 280. “Wind” performed in step 270
"Glass lowering process" lowers the wind glass WG
Is a process for
"Glass stop processing" stops the windshield WG
This is a process for (details will be described later). This station
Protective processing SRT of the 260 to 280
The windshield position setting device 8 is operated to set the position.
SP changes and the value of the overload flag OF is reset to 0
(Steps 130 and 140) until it is executed. This
As a result, the wind glass WG will be
A predetermined amount AW below the position where it was determined to be caught.
It can be let down. On the other hand, in step 250, an overload is detected.
If not issued, the overload flag OF = 1 has failed.
It is determined to be upright, and the process proceeds to step 300 and thereafter, and
Align the moving position X of the windshield WG with the set position SP.
Perform processing for saving. In step 150 above
If it is determined that the moving position X> FE is satisfied,
Since there is no worry of inclusion, step 160 described above
Without performing the processing of No. to 280,
Proceed to step 300 and subsequent steps. First, in step 300, the moving position X and
The magnitude relationship with the set position SP is determined. That is, moving position
When it is determined that the position X> SP, the process moves to step 270.
When it is determined that the position X = SP, the process proceeds to step 280.
When it is determined that the moving position X <SP, the process proceeds to step 310,
Each process proceeds. This step 270, 280, 310
"Wind glass descent processing", "Wind glass stop
Processing "and" Wind glass rise processing "are shown in Fig. 5 (A) respectively.
This will be described with reference to the flowcharts (a) to (c). "Wind glass descending process" is shown in FIG.
The process shown in the flowchart of is executed. First step
In 350, the value of the descending flag DF is determined.
It Here, when it is determined that the descending flag DF = 1 is satisfied,
Wind Glass WG is already descending, processing
Is returned to "RETURN", and when it is determined that it is not established,
The processing of steps 360 to 380 is executed. At step 360, the descending process is started.
As the values of the up flag UF and the down flag DF, respectively.
The process of setting 0, 1 is performed. This rising flag U
When the value F is set to 1 for the F and the descending flag DF,
It shows that they are rising and falling respectively. Next move
The moving position X is stored in the RAM 32 as the descent start position DP.
Processing is performed (step 370). Continued Step 3
At 80, the DC motor 1 is rotated in the reverse direction and the windshield is rotated.
Reverse rotation via output circuit 35 to lower WG
A process of setting the output signal of the driver 41 to a high level is performed.
Be done. As a result, while the value of the descending flag DF is 1,
Indian Glass WG continues to descend. "Wind glass stop processing" is shown in FIG. 5 (B).
The process shown in the flowchart of is executed. That is, step
In 390, the moving position X reaches the set position SP.
Reset the rising flag UF and the falling flag DF to 0 respectively.
Then, in step 400, the DC motor is stopped for 1 time.
Therefore, through the output open circuit 35, the forward rotation driver 40, reverse rotation
Processing for setting the output signal of the driver 41 to low level is performed.
Be played. As a result, the DC motor 1 is stopped. "Wind glass rise processing" is shown in FIG. 5 (C).
The process shown in the flowchart of is executed. First step
In 410, the value of the rising flag UF is determined.
It Here, when it is determined that the rising flag UF = 1 is established.
Wind Glass WG is already on the rise,
The reason is that when it is judged that it is not established,
Executes the processing of steps 420 to 440. At step 420, ascending processing is started.
As the values of the up flag UF and the down flag DF, respectively.
The process of setting to 1, 0 is performed. Next current movement position
Processing for storing x in the RAM 32 as the ascending start position UP
Is performed (step 430). Continued Step 440
Now, rotate the DC motor 1 forward and wind glass WG
In order to raise the
The output signal of the aver 40 is processed to the high level.
It As a result, while the value of the rising flag UF is 1, the wheel is
Windshield WG continues to rise. Steps 300, 270, 280, 3
Wind glass WG by performing the process of 10
Is lowered or raised to the set position SP, and the set position
It is stopped at the setting SP. Above, I explained in detail
According to the drive device with the overload protection device of the present embodiment, the win
Every time the dog glass WG descends, the lower position corresponding to the movement position X
A value obtained by multiplying the down load D (x) by a predetermined value Z (Z> 1) is sandwiched.
Recorded as backup load F (x) in backup RAM 33
Remember, the stored pinching load F (x) is
The arm or finger is caught when the dog glass WG rises
Is used as the comparison value. This allows the DC motor
1 or window regulator WR or side window
Sufficiently counters secular changes such as rubber materials in the SW door sash
The entrapment load F (x) shown is the comparison value for entrapment detection.
Can be used as As a result, the DC motor 1
The window regulator WR has changed over time,
Even if the characteristics change, or the rubber material is aged
Even if the frictional force changes due to changes, it is always
Entrapment load F (x) whose sensitivity is adjusted according to the new state
And motor load M (x) can be compared,
It is possible to detect only the spots accurately and with high sensitivity.
Therefore, the sensitivity of the trapping detection may be reduced, or malfunction may occur.
There is no such thing as causing problems such as rubbing
It Further, in this embodiment, the wind glass WG is lowered and raised.
The pinching load F (x) at the time of movement is set to the previously stored win
Using the pinching load F (x) before stopping the glass WG
Set the motor load when starting up the windshield WG
The pinching load F (x) compared with M (x) is stored
Based on the overcurrent of the DC motor 1, the trapped load F (x)
The predetermined value AW based on the above is added. By this
DC due to the starting current of the DC motor 1 and static friction force
Sense of malfunction or pinching due to overcurrent of motor 1
Stable sandwiching without causing irregularities
It also has the effect of enabling detection and control.
It In this embodiment, the pinching load F
(X) is configured to be stored in the backup RAM 33
However, it may be configured to be simply stored in the RAM 32.
Of course, in this case, the ignition
Window switch IG is turned on, wind glass WG
Is not fully closed, the pinching load F (x) is
Store the sandwiching load F (x) with a wide margin in the ROM 31.
In addition, it may be possible to configure to use this value.
Be done. At this time, the windshield WG is in the fully closed state.
At this time, as shown in this embodiment, the falling load D (x) is
Set the pinching load F (x) using the
And use the motor load M (x) when raising the window WG.
The net load F (x) may be set. This will
Power-up for backup RAM 33 and backup RAM 33
A simple configuration can be achieved without providing a source or the like. Further, in this embodiment, the wind glass WG is used.
Process for moving (steps 300, 270, 28
0,310) moving position without hysteresis
Although it was configured to determine x,
Even if the hysteresis processing used for positioning is performed
No problem whatsoever. The drive device with the overload protection device of the present invention comprises:
When the drive means is started, it is based on the comparison value learned before the stop.
Learning the comparison value based on the
We are comparing with the load. Thereby, for example, the driving means
Arms, fingers, etc. are caught when the opening covering is closed at startup.
In this case, the entrapment is detected as a driving means.
For example, it is necessary to fully reflect the secular change of the motor and opening covering material.
The excellent effect that it is performed based on the comparison value
It Therefore, while moving the opening covering, overloading, that is, trapping
It is possible to detect defects and the like always accurately and with high sensitivity.
As a result, the sensitivity of trapping detection is low.
If you cause a problem such as lowering or malfunctioning
I have never said it.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram illustrating a basic configuration of a drive device with an overload protection device of the present invention. FIG. 2 is a schematic configuration diagram showing a configuration of a drive device with an overload protection device according to an embodiment of the present invention. FIG. 3 is a flowchart showing an “overload protection process” executed by the ECU 10. FIG. 4 is a flowchart showing an “overload protection process” executed by the ECU 10. 5 (A), (B) and (C) are flowcharts showing an "overload protection process" executed by the ECU 10. FIG. FIG. 6 is a graph illustrating a motor load M (x) with respect to each moving position x. FIG. 7 is a graph illustrating a motor load M (x) with respect to each moving position x. [Explanation of reference numerals] 1 DC motor 2 Forward rotation relay 3 Reverse rotation relay 4 Load detection circuit 10 Electronic control unit (ECU) 12 Window BAT Battery IG Ignition switch R1 Resistor SW Side window WG Wind glass WR Window regulator

Claims (1)

[Claims] 1. Driving means for opening and closing the opening covering material for covering the opening, load detecting means for detecting a load of the driving means when the driving means opens and closes the opening covering material, and the opening covering driven by the driving means. When the material moves, a comparison value learning means for learning a comparison value used for detecting the overload of the driving means based on the detected load of the driving means, and the opening covering material driven by the driving means. When the vehicle moves, comparing means for comparing the detected load value of the driving means with the learned comparison value, and the load value of the driving means detected by the comparing means is larger than the comparison value. When it is determined that the comparison value is based on the comparison value learned before stopping when the drive means is started, the comparison load learning means reduces the load on the drive means. Study Overload protection device with driving unit and performing. 2. The overload protection device according to claim 1, wherein the comparison means uses a value based on a comparison value learned last time and a load value detected at the time of startup as the comparison value when the driving means is started. Drive device.